Rivers and Rose in the Power Plant Palace
Originally posted January 25, 2013:
When is the appropriate time to call 911? Calling 911 in the Power Plant is when you call the Shift Supervisor to report something important. As Randy Dailey, our Safety Trainer extraordinaire, always taught us, first tap the person on the shoulder and say, “Are you all right?” Then you point your finger at someone and say, “Call 911!” That’s called “Activating the EMS” (Emergency Medical System). Besides medical emergencies, there are other reasons to call the Shift Supervisor.
I learned early on to ‘fess up when you have done something wrong.” People appreciate it when you tell them up front that you goofed. That way the problem can be dealt with directly. Dee Ball was that way. Any time he wrecked a truck, he didn’t hesitate to tell his boss. So, even as a summer help I had developed this philosophy. Never be afraid to expose your blunders. It works out better in the long run.
One example of someone not following this philosophy was Curtis Love. As I mentioned in the post Power Plant Spider Wars and Bugs in the Basement, Curtis didn’t want to tell anyone that he had been bitten by a brown recluse for the third time because he was afraid of losing his job.
The Oklahoma house spider — The Brown Recluse
His philosophy came back to bite him a year and a half later when he was on the labor crew when he was the designated truck driver. I had moved on to the electric shop by this time.
A red crew cab like this only the bed of the truck was longer
He was backing up the crew cab around a corner under the Fly Ash hoppers up at the coalyard when the side of the crew cab came into contact with one of those yellow poles designed to protect the structure from rogue vehicles. Unfortunately. This created a dent in the side of the truck.
An example of yellow poles protecting an area
Curtis, already on probation. worried that he would be fired if he told anyone about this mishap, failed to tell Larry Riley about this incident. Larry, on the other hand, was standing in front of the Coalyard Maintenance shop (the labor crew home), and saw the entire incident. At that moment, he turned to one of the labor crew hands and said, “I hope Curtis comes over here and tells me about that.” Unfortunately, Curtis decided to act as if nothing had happened. This resulted in his termination. As much as I cared about Curtis, I must admit that the Power Plant scene was probably not the best location for his vocation.
I had seen Dee Ball do the same thing over and over again, and he always reported his accidents immediately. He was never punished for an accident, though, for a number of years, he was banned from driving a truck. You can read more about this in the post: Experiencing Maggots, Mud and Motor Vehicles with Dee Ball.
One day during the summer of 1984 just after lunch, 1A PA fan tripped (PA stands for Primary Air). When this happened, number one unit had to lower it’s output from over 500 Megawatts down to around 200. The trip indicator on the 6900 volt breaker said that it had been grounded. Being grounded means that one of the three phases of the motor or cable had made a circuit with the ground (or something that was grounded). The trip circuits shut the fan down so fast that it prevents an explosion and saves the fan from being destroyed.
Diana Lucas (later Diana Brien), Andy Tubbs and I were given the task of finding the ground and seeing what we could do to fix it. We unwired the motor, which was no easy task, because the motor is about the size of a large van, and about 10 times heavier.
This is about 1/2 the size of the PA fan motor which is 1000 horsepower
So, we spent the rest of the day unwiring the motor (in the rain), and unwiring the cable to the motor from the breaker in the main switchgear and testing both the motor and the cable with various instruments looking for the grounded wire or coil that caused the motor to trip. We used a large “Megger” on the motor. It’s called a Megger because it measures Mega-Ohms. So, it’s technically called a Mega-Ohm meter. Ohms is a measurement of resistance in an electrical circuit. We usually use a small hand cranked megger, that is similar to an old hand crank telephone that generates a high voltage (good for shocking fish in a lake to make them rise to the surface). In the case of the hand cranked Megger, it would generate 1,000 volts.
A Hand cranked Megger made by the same company, only newer than the ones we had
The Megger this size would have been useless with this large motor. Instead we used one that was electric, and you ran the voltage up over 10,000 volts and watched the mega-ohms over a period of 1/2 hour or so.
For the cables, we hooked up a Hypot (or Hipot). This stands for High Potential. Potential in this case is another word for “Voltage”. It would charge up and then you pressed a button and it would send a high voltage pulse down the cable, and if there is a weak spot in the insulation,The Hypot will find it. So, we hooked a Hypot up to the cable and tried to find the grounded wire. No luck.
After spending 4 hours looking for the grounded cable or motor, we found nothing. We spent another hour and a half putting the motor and the breaker back in service. The Fan was put back into operation and we went home. As I was walking out to the car with Bill Rivers, he told me, “I knew they weren’t going to find anything wrong with that fan.” He had a big grin on his face.
At first I thought he was just making an educated guess as Rivers was apt to do on many occasions (daily). It was raining and I could see where water may have been sucked into the motor or something and had momentarily grounded the motor. Just because we didn’t find anything didn’t mean that the breaker didn’t trip for no reason.
When we were in the car and on our way to Stillwater, Oklahoma with Yvonne Taylor and Rich Litzer, Bill explained that he knew why the motor tripped. He had been walking through the main switchgear with Mike Rose, and Mike, for no apparent reason other than curiosity, had opened up the bottom door to the breaker for 1A PA fan. He looked at it for a moment and then slammed the door shut. When he did this, the breaker tripped.
So, the ground relay happened to be the one that tripped. It might as well been an over-current or a low voltage trip. It just happened to trip the ground trip. Bill said that he told Mike that he should call the Shift Supervisor and let him know so they could restart the motor. Mike on the other hand told Bill that he was already on probation and was afraid of losing his job if he reported that he had slammed the door on the breaker and tripped the fan.
If there was ever a reason to call 911, it was then. All he had to do was tell them, “I accidentally tripped the PA fan when I bumped the breaker cabinet.” They would have told him to reset the flag, and they would have started the fan right back up. No questions asked… I’m sure of it. And they wouldn’t have lost their generating capacity for the remainder of the afternoon and we wouldn’t have spent 4 hours unwiring, testing and rewiring the motor in the rain with a plastic umbrella over our head.
Bill wasn’t about to tell on Mike. If Mike didn’t want to report it, Bill wasn’t going to say anything, and I understand that. I probably would have kept it to myself at the time if I was in Bill’s shoes (I’m just glad I wasn’t because I probably wouldn’t have been able to sleep soundly for the next year). But 30 years later, I might write about it in a Blog. Even though I wouldn’t have looked to Mike to teach me much about being an electrician (he was more of an Air Condition man anyway), I still loved the guy.
Mike died almost two years ago on May 29, 2011. He was from England and had lived in Canada for a time. He used to work on trains. Trains, even though they are diesel, are really electric. The Diesel engine really runs a generator that generates electricity that runs the train. I know that Mike was a good man at heart. He loved his family with all his heart. Here is a picture of the Limey:
Mike Rose. A fair plant electrician, but a great family man!
Ok. So I know what you are thinking…. There must be a story about myself in here somewhere. Well, you would be right. First of all. I always ‘fessed up to my mistakes, as my current manager at Dell knows well (yes. I still mess up after all these years). I told my current manager the other day that CLM was my middle name. (CLM means “Career Limiting Move”). So here is my power plant “mess up” story (well one of them):
In January 1986, I returned from my Honeymoon with my new wife Kelly when I found that we had hired a new electrician. Gary Wehunt was replacing Jim Stephenson who had left the plant on February 15, 1985, which is a story all it’s own. We had just started an overhaul on Unit 1.
I remember the first Monday I spent with Gary. It was January 6, 1986 and we were working on cleaning out the exciter house on the end of the main power generator with Diana Brien (formerly Diana Lucas). We were discussing salaries and Gary was surprised to find out that I was making more than he was. Well… I had been an electrician for over 2 years and had been promoted regularly…. so I didn’t think there was anything strange about it, except that I still looked like I was only about 18 years old (even though I was 25) and Gary was about 34. I had already been promoted 4 times and my salary had gone from $7.15 to over $12 an hour.
Anyway, when that first Wednesday rolled around, Since Gary and I were assigned to Substation Inspection that week, (Some later time I may go into the details of what “Substation Inspection” entails), but for now, let’s just stick with my “911 call.” It is enough to say that we were in the main plant substation relay house on Wdnesday January 8, 1986 at 9:00 am. One of our jobs was to call other substations and perform a test called a “Transfer Trip and Carrier Test”. We had called Woodring Substation (Woodring is a town in Oklahoma and we had a 345 KV line going there), and I was talking to the man in the substation on the other end of the phone line.
At the same time I was showing Gary just how experienced I was at being an electrician. People had told me that you had to be a plant electrician for 5 years before you really became a “first class” electrician. Well. Here I was at 2 years, and I thought I was so good that I could do anything by now…. — Yeah… right. I told the guy on the other end of the line as I turned a switch…. Amber light… Back to Blue…. and I wrote down the value on the meter (paperwork… oh yes…. it’s that important. Like A-1 sauce).
Then I reached for the second switch. I said, “Carrier test”, then turned the switch. The lights in the relay house went out and we were in the dark. I told the guy on the other end of the line….. “Well. That’s not supposed to happen.” Then as I let go of the switch and it returned to it’s normal position, the lights turned back on. Okay……
I wrote the numbers down from the meter and said goodbye to the other faceless substation man on the other end of the line that I talked to over 100 times, but never met in person. He sounded like a nice guy. Then I headed for the gray phone. I heard the Shift Supervisor paging Leroy Godfrey (The Electrical Supervisor) on line 2 (we had 5 Gray phone lines. The Gray Phone was our PA system).
When I picked up the line I heard Leroy pick up the phone and the Shift Supervisor tell Leroy that we just lost station power in the main substation and it had switched over to Auxiliary power. I immediately jumped in and said, “Jim (for Jim Padgett, the Shift Supervisor), I did that. I was performing a Carrier test with Woodring and the moment I performed the carrier test the lights went out.” Leroy chimed in by saying, “That wouldn’t cause you to lose station power.”
Well, in my ‘inexperienced’ plant electrician way, I responded, “Well. All I know is that when I turned the switch to perform the carrier test, the lights went out, and when I let go of the switch, the lights came back on.” Leroy reiterated, “That wouldn’t cause you to lose station power.” I replied with, “I’m just saying….” and left it at that. I had done my job. They knew I was out here. They knew I had called 911 right away. I explained what I was doing…. they could take it from there.
I had hoped that I had showed Gary upfront that it doesn’t hurt to report your mistakes (even though I hadn’t made one as far as I could tell), but I was 100% sure I had done something to cause the relay house to lose power. Though, I couldn’t figure out why.
After lunch, Bill Bennett, our A foreman came down to the shop to tell me that they figured out how the substation lost station power. He said that a road grader had been grating the road down by the Otoe-Missouri reservation (which is actually called “Windmill road” I guess because there is a windmill down that road somewhere), and had hit an electric pole and knocked it over and had killed the power to the substation.
Substation Power Interrupting Road Grader
It turned out that the substation relay house was fed by a substation down that road where we have a radio tower. So, think about this. The exact time that I turned that switch in the substation, a road grater 2 1/2 miles away hits a telephone pole accidentally and knocks it to the ground and kills the power to the substation at the exact same time that I am performing a transfer-trip and Carrier test with Woodring Substation, and the time it takes to switch to auxiliary power is the exact time it took me to let go of the switch.
Don’t tell me that was by accident. I will never believe it. I think it was for the soul purpose of teaching me a useful lesson or two. First….. don’t be afraid to tell someone when you do something wrong. Second…. If you think you have control over the things that happen to you in your life… well, think again…… Third….. God watches you every moment, and if you let him, he will guide you to do the right thing when the time comes. Oh, and Fourth: “Doesn’t God have a great sense of humor?”
God bless you all.
COMMENTS FROM THE ORIGINAL POST:
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Monty Hansen January 26, 2013
I had a similar thing happen to me, I was upgrading to shift foreman & system called to remove a tag in the switchyard & put the switch back to auto. The tag on the pistol grip was attached with a plastic zip tie & the previous operator had put it on real tight, as I was wrestling it off with my leatherman, the pliers slipped & I banged my elbow into the control panel, at that very instant there was a loud BANG as several 345 KV breakers opened simultaneously in the switchyard, I had the phone pinched between my shoulder & ear as I was wrestling with this switch & talking to the system control operator, he said a few bad words – gotta go – & hung up. The power plant lost all power & went in the black, I, of course was just sick in the pit of my stomach, after we got power restored, the plant back on etc. I called system back to see if they found the cause & fess up to causing the trip (I figured I must have caused a trip relay to close when I hit the panel) – anyway a crane at a plant down the road had got it’s boom tangled in the power line & went to ground – AT PRECISELY THE INSTANT MY ELBOW SLIPPED & HIT THE PANEL!!
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Ron Kilman January 26, 2013
Some great illustrations of the truth in Proverbs 28:13 “He who conceals his transgressions will not prosper, But he who confesses and forsakes them will find compassion”.
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justturnright January 28, 2013
CLM: I can relate.
My first boss 30 years ago once told me he was going to officially nickname me “I’m sorry” (and make me wear it for a name badge) if I said it one more time.
Hey, there’s worse things.
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Roomy January 29, 2013
I had not thought about Mike Rose in years. He was a good guy to work with, now Rivers was a different story!!!
Sub checks, I used to love to do sub checks. I performed pilot wire & transfer trip checks for years. I hated it when they went to being done by automation.
Thanks for bringing back old memories.
Importance of Power Plant Backup Battery Preventative Maintenance
The very last thing I ever learned in High School was the importance of Backup Battery Preventative Maintenance. In fact, the entire senior class of 1978 at Rockbridge High School in Columbia, Missouri learned this lesson at the same time. It was during the graduation ceremony in May while the students were walking across the stage to receive their diplomas.
I had already received mine and I was back in my seat sitting between Tracy Brandecker and Patrick Brier (we were sitting alphabetically. My last name is Breazile). Pat was sitting on my left and Tracy was on my right. We were grinning from ear-to-ear to be graduating. My friends from the second grade, Mark Schlemper, Russell Somers and Brent Stewart had just walked across the stage in the gymnasium while a storm raged outside. As my friend from the fifth grade forward, Matt Tapley was walking across the stage there was a loud crack of thunder and the sound of an explosion as the lights went out.
Matt Tapley has albinism, giving him white hair and skin. In his black robe, the entire class witnessed Matt’s head bobbing up and down in the faint light given off from the emergency lights to either side of the stage as he was bowing to his classmates. We all clapped. The clapping soon turned to laughter as the emergency lights quickly dimmed and went entirely out within a minute.
An emergency light
As we sat in total darkness waiting for some resourceful faculty member to make their way to the hidden fallout shelter in the basement of the school to retrieve the portable generator and a spotlight, I was amazed by how quickly the emergency lighting had failed. The transformer to the school had been destroyed by the lightning strike so we finished the ceremony by the light of the large spotlight from the back of gym. My thought was that the school is only 4 years old and already the emergency lighting is too old to stay lit long enough to even begin evacuating the building, if that was what we had intended to do.
Fast forward to the spring of 1984. I had become an electrician a few months earlier. As I was learning the electrical ropes, I learned the importance of Preventative Maintenance in a power plant setting. The majority of an electrician’s job when I first joined the electric shop was doing “Preventative Maintenance”. I have some horror stories of bad preventative maintenance that I will share much later. I will point out now that most Americans know of some stories themselves, they just don’t realize that the root cause of these major failures were from a lack of preventative maintenance.
A power plant, like the emergency lights in the High School, has a battery backup system, only it is on a grand scale. There are backup batteries for every system that needs to remain online when there is a total blackout of power. These batteries needed to be inspected regularly. We inspected them monthly.
At first, I had done battery inspections with various electricians. Some people didn’t seem to take this task very seriously. I remember that when I did the inspections with Mike Rose, he usually finished by taking a gallon of soda water (a gallon of water with a box of baking soda dissolved into it) and pouring it all over the batteries.
My bucket buddy, Diana Lucas (Dee), on the other hand, took a different approach. We carefully filled each cell with just the right amount of distilled water. Then she showed me how to meticulously clean any corrosion from the battery posts using a rag soaked in the soda water, and then she would paint the area on the post where the corrosion was with No-Ox grease.
A jar of No-Ox Grease (No-Ox means No Oxide)
When I say batteries, you may think that I’m talking about batteries like you have in your car, or even in a large piece of equipment like a big dirt mover. Some of the batteries were the size of a battery used in a large dozer or dirt mover:
A battery used in a large dozer
Some of the batteries that we inspected were of this type. They were usually hooked up to generators that could be started up in case all the power was out and we needed to start up a diesel generator. However, this was just the puppies when it came to the Station Power Batteries. These were some serious batteries:
These are the type of UPS Station batteries used at the plant. The battery shown on the left is about the size of a small file cabinet
As big as these batteries are, it takes 58 of them for each system to come up with a 130 volt circuit. That’s right. 58 of these batteries all in a series. The station batteries are all in rooms by themselves known as…. “Unit 1 and Unit 2 Battery rooms”. Smaller station battery sets are found at different locations. Today, those places include the relay house in the main substation, the Microwave room on the roof of #1 boiler. The River pumps, the radio tower building, the coalyard switchgear, Enid Turbine Generators and the Co-Generation plant in Ponca City. I’m sure I’m leaving some out. Maybe a current electrician at the plant can remind me of the others in a comment below. Each of these locations have approximately 58 station batteries.
While I was still a novice electrician, one morning in May I was told that I was going with Dee and Ben Davis to Enid to a Battery training class at an electric company office where the manufacturer (C&D) was going to go over the proper maintenance of the station batteries. Ben drove the pickup. I remember sitting in the middle between Dee and Ben both going and coming back from our lesson on Battery Preventative Maintenance….
Interesting that Ben was sitting to my left and Dee to my right that day… just like Pat and Tracy during the graduation ceremony 6 years earlier to the month when we first learned the impact of bad preventative maintenance on backup batteries. This time we were learning how to prevent the problem I had witnessed years before. I don’t know why I draw parallels like that. It just seem to make life a little neater when that happens. I don’t remember Ben and Dee grinning ear-to-ear like Pat and Tracy were the night we graduated from High School, but I can assure you, I was grinning the entire 45 minutes going to Enid and the 45 minutes going back to the plant.
Since I had been trained for battery maintenance, I suppose it was like Andy Griffith becoming the Permanent Latrine Orderly (PLO) in the movie “No Time For Sergeants”. I was able to go to town inspecting all kinds of backup batteries.
Andy Griffith as Permanent Latrine Orderly in No Time for Sergeants grinning ear-to-ear
Gene Roget (pronounced with a french accent as “Row Jay” with a soft J) was a contract electrician when I first became an electrician in the shop. I wrote about him in the post New Home in the Power Plant Electric Shop. He was a great mentor that taught me a lot about how to be an electrician. He taught me how to use all the different tools in my tool bucket. He taught me how to bend conduit and make it come out the right length on both ends…
He especially taught me the importance of doing a “pretty” job when running wire or conduit or just rewiring a motor. I remember Gene stopping one day when we were walking to the precipitator and he paused to look up at the transfer tower. I asked him where he was looking. He said, “I’m just admiring the wonderful job someone did bending that set of conduit. that’s a perfect job! Just perfect!”
Anyway, Gene and I were given the task of checking all the batteries in the emergency lights throughout the plant. It happened that the emergency lights at the plant were all about 5 years old. Probably about the same age as the lights were in the high school the night of our graduation. The lights in the plant had wet cells. Which meant that you had to add distilled water to them like you do in your car, or in the station batteries. This amounted to a pretty large task as there were emergency lights stationed throughout the plant.
We found many of the lights that would never have been able to light up enough to cause a cockroach to run for cover. We took the bad ones back to the shop to work on them. A lot of the batteries had gone bad because they had never been checked. They have a built-in battery charger, and some of the chargers were not working. I drew a wiring diagram of the charger so that we could troubleshoot them and replace components that had gone bad.
All of this was like a dream to me. At the time I couldn’t think of any other place I would rather be. I loved taking things that were broken and fixing them and putting them back into operation. Eventually we decided to change the emergency light batteries to dry batteries. Those didn’t need water. We could pull out the six wet cells from each emergency light box and just plug the new batteries in place. This made a lot more sense. Who has time to go around regularly and check 50 or 60 emergency lights every 3 months? Not us. Not when we were trying to save the world.
Back to the Station Batteries:
Just to give you an idea of how important these batteries are, let me tell you what they are used for…. Suppose the power plant is just humming along at full power, and all of the sudden, the power goes out. It doesn’t matter the reason. When there is a blackout in a city, or a state, be assured, the power plant itself is in a blackout state as well. After all, the power plant is where the electricity is being created.
In the plant there is large equipment running. The largest and most valuable piece of equipment by far in a power plant is the Turbine Generator. The entire plant exists to spin this machine. As big as it is, it spins at 3600 revolutions per minute, or 60 times each second. In order to do that, oil has to be flowing through the bearings otherwise they would burn up almost instantly. This would cause the generator to come to a screeching halt — and I mean “screeching!”
A turbine Generator Room at a nuclear power plant with a waxed floor! When I was a janitor I would wax the T-G floor.
So, in order to stop a turbine generator properly, when a unit is taken offline, once it has coasted to a smooth stop, the turbine has to be engaged to something called a “Turning Gear” which slowly rotates the turbine generator. This is turned off only when the shaft has cooled down. Without this, you might as well call General Electric and order a new one.
So, one of the most important things the station batteries do is run emergency oil pumps that engage immediately when the power is cutoff from the plant. This allows the turbine generator and other important equipment throughout the plant to slowdown and come to a stop gracefully in case the power is instantly gone.
I will write a story later about a day when this happened at our plant. The moments of confusion, and the quick decisions that had to be made to keep the unit 1 boiler from melting to the ground. Rest assured that throughout this time, the emergency oil pumps had kicked in. The station batteries did their job when they were called upon. While the control room operators were performing their emergency tasks to the letter and the electricians were scrambling to come up with a workable solution to an unforeseen problem, the turbine-generator, the PA (Primary Air) fans, the FD (Forced Draft) Fans, the ID (Induction) fans were all coasting down as the groundwork was being laid to quickly restore power.
Someone in an office in the middle of Oklahoma City may have noticed their lights flicker for a moment. Maybe they dimmed slightly…
If not for the proper maintenance of the power plant station batteries, the lights would have possibly gone dark. Someone would have had to go looking for the portable generator and the spotlight. Ceremonies in progress may have to continued under candlelight.
Lifecycle of a Power Plant Lump of Coal
Originally posted August 16, 2013:
Fifty Percent of our electricity is derived from coal. Did you ever wonder what has to take place for that to happen? I thought I would walk through the lifecycle of a piece of coal to give you an idea. I will not start back when the it was still a tree in a prehistoric world where dinosaurs grew long necks to reach the branches. I will begin when the large scoop shovel digs it out of the ground and loads it onto a coal truck.
The coal is loaded onto trucks like these before it is dumped onto the train cars. This photo was found at http://www.gillettechamber.com/events/eventdetail.aspx?EventID=2827
The coal for the power plant in North Central Oklahoma came from Wyoming. There were trains from the Black Thunder Mine and the Powder River Basin.
Coal Trains on their way to power plants
It’s a long ride for the lump of coal sitting in the coal train on it’s way to Oklahoma. Through Nebraska and Kansas. It’s possible for the coal to be visited by a different kind of traveler. One that we may call “A tramp.” Someone that catches a ride on a train without paying for the ticket.
One time a tramp (or a hobo, I don’t remember which), caught a ride on one of our coal trains. They forgot to wake up in time, and found their self following the lumps of coal on their next phase of the journey. You see. Once the coal reached the plant, one car at a time enters a building called the “Rotary Dumper”.
A rotary dumper much like the one that was at our Power Plant
As each train car enters the dumper four clamps come done on the car and it rolls upside down dumping the coal into a bin below. Imagine being a tramp waking up just in time to find yourself falling into a bin full of coal. with a car full of coal dumping coal on top of you. One coal car contained 102 tons of coal (today they carry 130 tons). Today one train contains 13,300 tons of coal. This is over 26 million pounds of coal per train.
Miraculously, this passenger survived the fall and was able to call for help or someone saw him fall. He was quickly rescued and brought to safety. Needless to say, the tramp went from being penniless to being, “comfortable” very quickly. I don’t know that it made the news at the time. I think the electric company didn’t want it to become “viral” that they had dumped a hobo into a coal bin by accident. Well. They didn’t know what “going viral” meant at the time, but I’m sure they had some other phrase for it then.
Ok. Time for a Side Story:
Since I’m on the subject of someone catching a clandestine ride on a train, this is as good of a place as any to sneak in the tragic story of Mark Meeks. Well. I say it was tragic. When Mark told the story, he seemed rather proud of his experience. You see. Mark was a construction electrician. He hired on as a plant electrician in order to settle down, but in his heart I felt like he was always a construction electrician. That is, he didn’t mind moving on from place to place. Doing a job and then moving on.
Mark explained that when he was working at a construction job in Chicago where he worked for 2 years earning a ton of overtime, he figured that by the time he finished he would have saved up enough to buy a house and settle down. He was married and living in an apartment in Chicago. He didn’t spend much time at home as he was working 12 hour days at least 6 days each week. He figured that was ok, because when he was done, he would be set for life.
Unknown to him at the time, each morning when he woke up before the crack of dawn to go to work, his wife would drive to O’Hara airport and catch a plane to Dallas, Texas where she was having an affair with some guy. By the time Mark returned from work 14 hours later, she was back home. Each day, Mark was earning a ton of overtime, and his wife was burning it on airline tickets.
When the two years were over, Mark came home to his apartment to collect his wife and his things and go live in peace in some small town some where. That was when he learned that his wife had been having the affair and using all his money to do it. She was leaving him. Penniless.
Completely broke, Mark drifted around for a while. Finally one day he saw a train that was loaded down with wooden electric poles. Mark figured that wherever those poles were going, there was going to be work. So, he hopped on the train and traveled all the way from Minneapolis Minnesota riding in the cold, wedged between some wooden poles on one of the cars on the train.
The train finally arrived at its destination somewhere at a port in the Gulf of Mexico. I don’t remember if it was Mississippi or Louisiana. He watched as they unloaded the poles, waiting to see what jobs were going to be needed for whatever the poles were for. He watched as they took the large wooden poles and piled them up in the ocean. They were using them to build up the shoreline. There were no jobs.
It is when you have been beaten down to the point of breaking when you reach a very important point in your life. Do you give up, or do you pick yourself up and make something of yourself? Mark chose the latter. He was a natural fighter. He eventually ended up at our plant as contract help, and then was hired as a plant electrician.
End of side story.
Let’s follow the lump of coal after it is poured out of the coal train in the dumper…
The coal is fed onto a conveyor belt. Let’s call this Conveyor 1, (because that is what we called it in the plant). This has a choice to feed it onto belt 2 which leads up to the stack out tower, or it can feed the other way to where some day it was planned to add another conveyor with another stackout tower. This was going to go to a pile of coal for two other units that were never built.
Anyway, when the coal drops down on Conveyor 2, way under ground, it travels up to the ground level, and continues on its way up to the top of the stackout tower where it feeds onto Belt 3. Belt 3 is a short belt that is on an arm that swings out over the coal pile. The coal is fed onto the coal pile close to the stack out tower. I suppose it is called stack out, because the coal is stacked up next to the tower.
A view of the coalyard from the top of the Smoke Stack. The tower with the conveyor running up to the top is the stack out tower. Belt 3 is the arm pointing to the right in this picture
Anyway, there are large dozers (bulldozers) and dirt movers that pickup the coal and spread it out to make room for more coal from more coal trains. As mentioned above. One train now carries 26 million pounds of coal.
Dirt Mover full of coal
the coal that is spread out on the coal pile has to stay packed down otherwise it would spontaneously combust. That is, it would catch on fire all by itself. Once coal on a coal pile catches on fire it is impossible to “reasonably” put out. You can spray all the water on it you want and it won’t go out. When a fire breaks out, you just have to drag the burning coal off of the pile and let it burn out.
In order to keep the coal from performing spontaneous combustion, the dirt movers kept it packed down. As long as the coal is packed tight, air can’t freely reach the buried coal, and it doesn’t catch fire. So, dirt movers were constantly driving back and forth on the coal pile to keep the coal well packed. Even on the picture of the coalyard above from the smoke stack, you can see two pieces of heavy equipment out on the coal pile traveling back and forth packing the coal.
Anyway, the next phase in the life of the lump of coal happens when it finds itself directly under the stack out tower, and it is fed down by a vibratory feeder onto a conveyor. In our plant, these belts were called, Belts 4, 5, 6 and 7. Belts 4 and 5 fed onto Belt 8 and belts 6 and 7 fed onto belt 9.
Belts 8 and 9 brought the coal up from under the coal pile to the top of the Crusher tower. In the picture above you can see that tower to the right of the stack out tower with the long belts coming from the bottom of the tower toward the plant. The crusher tower takes the large lumps of coal that can be the size of a baseball or a softball and crushes it down to the size of marbles and large gumballs.
Coal conveyor carrying coal to the coal silos from the coalyard. This is the size of the coal after it has been crushed by the crusher
From the crusher tower the lump of coal which is now no more than a nugget of coal travels from the coal yard up to the plant on belts 10 and 11.
conveyor 10 and 11 are almost 1/2 mile long
Up at the top of this belt in the distance you can see another tower. This tower is called the Transfer tower. Why? Well, because it transfers the coal to another set of belts, Belt 12 and 13. You can see them going up to the right to that tower in the middle between the two boilers.
The tower between the two boilers is called the Surge Bin tower. That basically means that there is a big bin there that can hold a good amount of coal to feed to either unit. At the bottom of the white part of the tower you can see that there is a section on each side. This is where the tripper galleries are located. There are two belts in each tripper, and two belts that feed to each tripper belt from the surge bin. So, just to keep counting, Belts 14 and 15 feed to unit one and belts 16 and 17 feed to unit 2 from the surge bin. then Belts 18 and 19 are the two tripper belts that dump coal into the 6 silos on unit one, while belts 20 and 21 feed the silos on unit 2.
Once in the Coal silos, the coal is through traveling on belts. The silos are positioned over things called bowl mills. The coal is fed from the silo into the bowl mill through something called a Gravimetric feeder, which is able to feed a specific amount of coal into the bowl mill. This is the point that basically decides how hot the boiler is going to be.
Once the coal leaves the gravimetric feeder and drops down to the bowl mill, it is bound for the boiler. The gravimetric feeder is tied right to the control room. When they need to raise load more than just a minimal amount, a control room operator increases the amount of coal being fed from these feeders in order to increase the flow of coal into the boiler….. I don’t know… maybe it’s more automatic than that now…. The computer probably does it these days.
When the nugget of coal falls into the bowl mill the long journey from the coal mine in Wyoming is almost complete. Its short life as a nugget is over and it is pulverized into powder. The powder is finer than flour. Another name for a bowl mill is “Pulverizer”. The coal comes from the Powder River Basin in Wyoming and just before it is consumed in Oklahoma it really does become powder.
Big rollers are used to crush the coal into fine particles. The pulverized coal is blown up pipes by the primary air fans and blown directly into the boiler where they burst into flames. A bright orange flame. The color reminds me of orange sherbet Ice cream.
The color of the fireball in the boiler
At this point an incredible thing happens to the coal that so many years ago was a part of a tree or some other plant. The chemical process that trapped the carbon from the carbon dioxide millions of years earlier is reversed and the carbon is once again combined to the oxygen as it was many millennium ago. A burst of heat is released which had been trapped after a cooling effect below the tree as it sucked the carbon out of the environment way back then.
The heat is transferred to the boiler tubes that line the boiler. The tubes heat the water and turn it into steam. The steam shoots into the turbine that turns a generator that produces the electricity that enters every house in the country. The solar power from eons ago that allowed the tree to grow is being used today to power our world. What an amazing system.
To take this one step further, the carbon dioxide that is released into the atmosphere today is replenishing the lost carbon dioxide from many years ago. Back when plants could breathe freely. Back before the carbon dioxide level was depleted almost to the point of the extinction of plant life on this planet. Remember, what we look on as a pollutant and a poison, to a plant is a chance to grow. The Sahara desert used to be a thriving forest. Maybe it will be again some day.
So, there is the question of global warming. We humans are so short sighted sometimes. We want to keep everything the same way we found it when we were born. We try desperately to keep animals from becoming extinct. We don’t think about the bazillions (ok, so I exaggerate) of animals that were extinct long before man arrived. It is natural for extinction to occur. That is how things evolve. We are trying to keep a system the same when it has always been changing.
Years from now we may develop ways to harness the energy from the sun or even from the universe in ways that are unimaginable today. When that time arrives, let’s just hope that we remain good stewards of the world so that we are around to see it. I believe that the use of fossil fuels, (as odd as that may seem) is a major step in reviving our planet’s natural resources.
Comments from the previous repost:
Glad Mark fought the good fight, still a sad story.
Antion August 21, 2014
Great read. I love knowing how things work. As I read the sad story of the traveling electrician, I kept wondering if she could have pulled that off in today’s world of air travel.
when I went to the Christian College in Eugene Oregon, they forced me to take a course in biology at the University of Oregon. I willingly sat and listened to the mix of science and evolution. I admit their perspective was intriguing.
at the end of the class, the last day, the instructor asked each one of her students to tell how the class had affected their thinking.
each one gave the politically correct answer in a variety of form. all the while I sat joyfully waiting my turn.
my response hushed the class for a moment. (it’s been some decades ago so I have to paraphrase but let it be sufficient) “I’m impressed with all the material you’ve covered. it’s astounding to think of all the things that were. but for me this class has only glorified my God. because I realize that in his wisdom he created gasoline for my car.”
you’ve covered a lot of material in your post. and I’m impressed at your diligence to complete it. I thank God for His faithfulness that he has put into you. may He prosper your testimony for the glory of His Holy Son.
By His Grace
(please overlook the syntax errors in this reply it was generated on a mobile device)
We processed several hobo’s through our coal system, & injured a few, but none ever got anything from the power company. I remember we would always worried about finding a chunk of scalp or something in the grating where the tripper car drops coal down into the silo. One especially memorable event was when a coal yard operator found a down vest jacket on the coal pile and bragged about how lucky he was to find this jacket, the size even fit, but the jacket did smell a little funny. yes it was ripped off the body of a hobo by the plow above conveyor one & shot out onto the coal pile by the stackout conveyor.
It was always unnerving to have a pull cord go down in the middle of the night deep down in the coal trestle, while the belts were shut down. You’d have to go down there alone, in the dark & reset the pull cords, so the belts could be started later when needed. You knew it wasn’t a trick because the whole crew had been up in the control room together eating dinner or something. You always wondered if you might run into a real hobo – or the ghost of one.
Doing Dew Point Tests and Lowering Expectations
Originally posted May 9, 2014:
There were times when I was working at the Coal-Fired Power Plant in North Central Oklahoma when I wondered if there was anything that we couldn’t do. Surrounded by True Power Plant Men I found that when we were facing a seemingly impossible task, a Power Plant Man would come up with an extremely creative solution to the problem. One such example was during the “We’ve Got The Power” program. I talked about this program in an early post called “Power Plant We’ve Got the Power Program” so I won’t go into detail here about the program itself. I will just say that we broke out into teams to find creative ways to operate more efficiently, and to cut costs.
I was a team leader of our team, and looking back I must have had two criteria in mind when I picked the team members that would be on my team. The first would have been that they were True Power Plant Men (and woman) with a higher than average intelligence. The second criteria would have been that they were friends of mine. I say this, because everyone on my team fit the bill.
During out team meetings, Terry Blevins would often say some bombastic statement that the average person may be inclined to dismiss immediately as being absurd. I say that because I remember more than once thinking that what Terry had just said wouldn’t amount to much. As it turned out, our biggest money saving ideas were those truly bombastic statements that Terry was making. One such idea had to do with the heaters on the precipitators that kept the hoppers and the insulators on the roof too hot to collect moisture.
The Precipitator is a very large box that takes the ash out of the exhaust before it goes out of the smoke stack (how many times have I made that statement in the last two years?). Anyway, the exhaust from the boiler after the coal has been turned to ash in the fireball in the boiler contains a large amount of moisture. The last thing you want to happen is for the temperature of the flue gas to fall below the dew point. When that happens, moisture collects on the structure in a form of… well… of Acid Rain. Basically eating away the precipitator and the duct work from the inside.
Somewhere along the line, it had been determined that the dewpoint of the flue gas was not higher than 250 degrees. So, as long as the structure was at least 250 degrees, no moisture would be collected. Four heaters were mounted on each of the 84 hoppers (on each of the two precipitators) and heaters were mounted on the roof around each of the insulators that held up the wire racks on both ends.
When Terry walked into the office to attend one of our first “We’ve Got The Power” team meetings, he said, I think we could save a lot of money if we did something about the heaters on the precipitator. — He may remember being greeted with blank stares (at least from me). Um. Ok. Heaters on the precipitator. I knew they were everywhere, but I never gave them much thought.
I think Terry could tell right away that I hadn’t taken his idea seriously. I don’t know. Maybe he was bothered by the sound of my eyeballs rolling around in circles as if someone has conked me on the head. So, he explained his idea further. He pointed out that the roof heaters on just one of the precipitators used about 211 kilowatt-hours and the hopper heaters used about 345 kilowatt-hours. Together it is more than half a Megawatt of power. — This definitely caught our attention. That meant that between both of the Precipitators (since we had two boilers at our plant), we could possibly save over a Megawatt of electricity every hour we could shut down the heaters.
The plant has a similar electrostatic precipitator, only ours is twice as long
After discussing all the aspects of the idea, we decided that in order for the idea to have any merit, we had to know if the dew point really was around 250 degrees, or was it possibly a lot lower. 250 degrees seemed high to begin with since the boiling point of water is 212 degrees. If lower, then we could have a workable idea. Originally, I wanted to tackle the task of finding the dew point. So, I went about it in a Science Experiment sort of way.
I figured that if we were able to lower the temperature of the flue gas to a known temperature below the dewpoint, and by knowing the volume of the gas, and the amount of liquid we could condense out of it, we could determine (possibly) the dew point. So, I brought my Graham Condenser to work, and Scott Hubbard and I went up to the 250 foot landing on the smoke stack with the intent of sucking a known amount of exhaust from the smoke stack while the unit was at full load.
Scott Hubbard
We would run it through the condenser while running cool water through it to lower the temperature.
The Exact Graham Condenser used in our experiment Spring 1990 (and that’s my hairy hand in this selfie)
I could measure the output of the vacuum pump by filling up an inverted Erlemeyer flask with water and then letting the flue gas displace the water. — I always loved doing experiments like this in the 9th grade science glass with Mr. Godfrey our Physical Science Teacher (Donna Westhoff, who may sometimes read this blog was in my class and sat right behind me).
An Erlenmeyer Flask (from Google Images, not from my Chemistry Lab)
Ok. Side Story, since I mentioned Donna Westhoff from the 9th grade 1974-75 school year.
I knew that Donna’s father was a fire fighter, because one day during a special outing when we were with a group of bicycling Junior High School students and a teacher, we stopped at Donna Westhoff’s house to get a drink of water. On the walls in her house were different types of fire fighting treasures. Donna explained that her father was a fire fighter… That was the Spring of 1975 in Columbia, Missouri
Fast forward 16 years later (1991) at the Power Plant in the middle of nowhere in North Central Oklahoma. Just about a year after the story I’m telling now…. I left the logic room and went to catch the elevator to the Control room. When the doors opened, Tony Mena was in there with a bunch of college age students giving them a tour of the plant. I entered the elevator and turned around to face the door as it closed.
As I was standing there, I suddenly became aware that the person standing next to me was staring right at me. So, I turned to see who it was. Standing next to me was someone that looked very familiar wearing a big grin as if she knew who I was. I recognized her, and while my mind was going through filing cabinets of memories trying to index this particular person, I asked her, “Don’t I know you?” She shook her head and said, “I’m Donna Westhoff!”
A High School picture of Donna Westhoff who is on the Lower Left
As the elevator door opened and we stepped out, Donna and I began talking about what we were both doing there. She was surprised to find that I had become an electrician at a power plant instead of some kind of scientist in a lab somewhere. Donna was going to school in Stillwater where one of the best Fire Fighting Schools in the country is found. Following in her father’s footsteps, I thought. After a while I could tell that Tony was getting a little perturbed that the wisdom he was imparting about the fire protection system on the Turbine Generator wasn’t being absorbed by Donna, so I cut our conversation short. It turned out that a very good friend of hers lived just two houses from where we lived, and her friend’s mother was my landlord. Peggy Pickens.
Ok. End of the side story, and another example of how I occasionally run into friends from my childhood in the most unexpected places (see the post: “Relay Tests and Radio Quizzes with Ben Davis“).
So. Scott Hubbard and I tried using the Graham Condenser and the Erlenmeyer Flask, but we quickly found out that this wasn’t big enough, to capture a large enough quantity. So, we increased the size of the condenser by winding a garden hose around inside of a water bucket and filling it with ice. Then we captured all the water that condensed in the hose.
A 5 gallon water bucket we used as our condenser with a garden hose and ice
When it finally came down to it. Even though it was fun trying to do this experiment halfway up the 500 foot smoke stack, I never was able to figure out how to calculate the dew point given the data I had collected.
That’s when we decided to look at dew point sensors in the parts catalogs. If we could stick a probe down into the precipitator and measure the dew point directly in the flue gas, that would be best. After looking at a few in the catalog, Terry Blevins said he thought he could make one. So, he went to work.
Terry Blevins
The next day he came in with an inch and a half conduit with hoses hanging out the back and a homemade sensor on the other end. I won’t go into detail how the sensor was built because some day Terry may want to patent this thing because, as it turned out, it was so sensitive that it could detect my breathe from about a foot away. If I breathed out of my mouth toward the sensor, it would detect the moisture in my breath. This was perfect!
We went to work on the roof of the precipitator sticking the probe down into different sections of the precipitator. It not only measured the moisture, it also had thermocouples on it that we used to accurately measure the temperature of the sensor as we varied the temperature by blowing cold air through the conduit using the same ice bucket and hose from before.
I could go into a lot of detail about how we performed our experiments, but it would only excite me and bore you. So, let me just say that we came up with two very important results. First of all, at full load when the humidity outside was at 100% the dew point was around 150 degrees! A full 100 degrees below what the plant had originally assumed. This was very important, because a lot of energy was spent trying to keep the flue gas above 250 degrees, and just by lowering it down to 210 degrees, still a safe amount above the dew point, that extra energy could be used to create electricity.
The second thing that we discovered was that the middle sections of the precipitator was a lot cooler inside than the outer fields. We realized that this was caused by the air preheater coils that rotated between the flue gas and the Primary Air intake duct. This took the last amount of heat possible from the exhaust and transferred it to the air going into the boiler so that it was already hot when it was used to burn the coal. Because of the way the air preheater coils rotated, the part of the duct toward the middle of the precipitator was a lot cooler than the air on the outside.
Diagram of a boiler. See the Air Preheater? Flue Gas on one side and ambient air on the other
Lower temperatures in the precipitator increased the performance, so we decided that if we could mix the air around as it was going into the precipitator so that the outer edges were cooler, then it would increase the overall performance. One suggestion was to put a mobile home in the duct work because in Oklahoma it was a known fact that mobile homes attracted tornadoes and it would probably cause a tornadic reaction that would mix up the flue gases. — We just couldn’t figure out how to convince management to put a mobile home in the duct between the economizer and the precipitator.
Thanks to Terry’s handy dandy Dew Point Sensor, we were able to prove that the hopper and roof heaters could be lowered to where we set the thermostat at 180 degrees. At that setting the heaters that used to always run at 250 degrees would remain off anytime the ambient temperature was above 45 degrees. In Oklahoma, that is most of the year. This turned out to save over $350,000 per year in energy savings at a cost of about 1.5 cents per kilowatt-hour. Not to mention the unknown savings from being able to lower the flue gas temperature by 40 degrees.
Rivers and Rose in the Power Plant Palace
Originally posted January 25, 2013:
When is the appropriate time to call 911? Calling 911 in the Power Plant is when you call the Shift Supervisor to report something important. As Randy Dailey, our Safety Trainer extraordinaire, always taught us, first tap the person on the shoulder and say, “Are you all right?” Then you point your finger at someone and say, “Call 911!” That’s called “Activating the EMS” (Emergency Medical System). Besides medical emergencies, there are other reasons to call the Shift Supervisor.
I learned early on to ‘fess up when you have done something wrong.” People appreciate it when you tell them up front that you goofed. That way the problem can be dealt with directly. Dee Ball was that way. Any time he wrecked a truck, he didn’t hesitate to tell his boss. So, even as a summer help I had developed this philosophy. Never be afraid to expose your blunders. It works out better in the long run.
One example of someone not following this philosoply was Curtis Love. As I mentioned in the post Power Plant Spider Wars and Bugs in the Basement, Curtis didn’t want to tell anyone that he had been bitten by a brown recluse for the third time because he was afraid of losing his job.
The Oklahoma house spider — The Brown Recluse
His philosophy came back to bite him a year and a half later when he was on the labor crew when he was the designated truck driver. I had moved on to the electric shop by this time.
A red crew cab like this only the bed of the truck was longer
He was backing up the crew cab around a corner under the Fly Ash hoppers up at the coalyard when the side of the crew cab came into contact with one of those yellow poles designed to protect the structure from rogue vehicles. Unfortunately. This created a dent in the side of the truck.
An example of yellow poles protecting an area
Curtis, already on probation. worried that he would be fired if he told anyone about this mishap, failed to tell Larry Riley about this incident. Larry, on the other hand, was standing in front of the Coalyard Maintenance shop (the labor crew home), and saw the entire incident. At that moment, he turned to one of the labor crew hands and said, “I hope Curtis comes over here and tells me about that.” Unfortunately, Curtis decided to act as if nothing had happened. This resulted in his termination. As much as I cared about Curtis, I must admit that the Power Plant scene was probably not the best location for his vocation.
I had seen Dee Ball do the same thing over and over again, and he always reported his accidents immediately. He was never punished for an accident, though, for a number of years, he was banned from driving a truck. You can read more about this in the post: Experiencing Maggots, Mud and Motor Vehicles with Dee Ball.
One day during the summer of 1984 just after lunch, 1A PA fan tripped (PA stands for Primary Air). When this happened, number one unit had to lower it’s output from over 500 Megawatts down to around 200. The trip indicator on the 6900 volt breaker said that it had been grounded. Being grounded means that one of the three phases of the motor or cable had made a circuit with the ground (or something that was grounded). The trip circuits shut the fan down so fast that it prevents an explosion and saves the fan from being destroyed.
Diana Lucas (later Diana Brien), Andy Tubbs and I were given the task of finding the ground and seeing what we could do to fix it. We unwired the motor, which was no easy task, because the motor is about the size of a large van, and about 10 times heavier.
This is about 1/2 the size of the PA fan motor which is 1000 horsepower
So, we spent the rest of the day unwiring the motor (in the rain), and unwiring the cable to the motor from the breaker in the main switchgear and testing both the motor and the cable with various instruments looking for the grounded wire or coil that caused the motor to trip. We used a large “Megger” on the motor. It’s called a Megger because it measures Mega-Ohms. So, it’s technically called a Mega-Ohm meter. Ohms is a measurement of resistance in an electrical circuit. We usually use a small hand cranked megger, that is similar to an old hand crank telephone that generates a high voltage (good for shocking fish in a lake to make them rise to the surface). In the case of the hand cranked Megger, it would generate 1,000 volts.
A Hand cranked Megger made by the same company, only newer than the ones we had
The Megger this size would have been useless with this large motor. Instead we used one that was electric, and you ran the voltage up over 10,000 volts and watched the mega-ohms over a period of 1/2 hour or so.
For the cables, we hooked up a Hypot (or Hipot). This stands for High Potential. Potential in this case is another word for “Voltage”. It would charge up and then you pressed a button and it would send a high voltage pulse down the cable, and if there is a weak spot in the insulation,The Hypot will find it. So, we hooked a Hypot up to the cable and tried to find the grounded wire. No luck.
After spending 4 hours looking for the grounded cable or motor, we found nothing. We spent another hour and a half putting the motor and the breaker back in service. The Fan was put back into operation and we went home. As I was walking out to the car with Bill Rivers, he told me, “I knew they weren’t going to find anything wrong with that fan.” He had a big grin on his face.
At first I thought he was just making an educated guess as Rivers was apt to do on many occasions (daily). It was raining and I could see where water may have been sucked into the motor or something and had momentarily grounded the motor. Just because we didn’t find anything didn’t mean that the breaker didn’t trip for no reason.
When we were in the car and on our way to Stillwater, Oklahoma with Yvonne Taylor and Rich Litzer, Bill explained that he knew why the motor tripped. He had been walking through the main switchgear with Mike Rose, and Mike, for no apparent reason other than curiosity, had opened up the bottom door to the breaker for 1A PA fan. He looked at it for a moment and then slammed the door shut. When he did this, the breaker tripped.
So, the ground relay happened to be the one that tripped. It might as well been an over-current or a low voltage trip. It just happened to trip the ground trip. Bill said that he told Mike that he should call the Shift Supervisor and let him know so they could restart the motor. Mike on the other hand told Bill that he was already on probation and was afraid of losing his job if he reported that he had slammed the door on the breaker and tripped the fan.
If there was ever a reason to call 911, it was then. All he had to do was tell them, “I accidentally tripped the PA fan when I bumped the breaker cabinet.” They would have told him to reset the flag, and they would have started the fan right back up. No questions asked… I’m sure of it. And they wouldn’t have lost their generating capacity for the remainder of the afternoon and we wouldn’t have spent 4 hours unwiring, testing and rewiring the motor in the rain with a plastic umbrella over our head.
Bill wasn’t about to tell on Mike. If Mike didn’t want to report it, Bill wasn’t going to say anything, and I understand that. I probably would have kept it to myself at the time if I was in Bill’s shoes (I’m just glad I wasn’t because I probably wouldn’t have been able to sleep soundly for the next year). But 30 years later, I might write about it in a Blog. Even though I wouldn’t have looked to Mike to teach me much about being an electrician (he was more of an Air Condition man anyway), I still loved the guy.
Mike died almost two years ago on May 29, 2011. He was from England and had lived in Canada for a time. He used to work on trains. Trains, even though they are diesel, are really electric. The Diesel engine really runs a generator that generates electricity that runs the train. I know that Mike was a good man at heart. He loved his family with all his heart. Here is a picture of the Limey:
Mike Rose. A fair plant electrician, but a great family man!
Ok. So I know what you are thinking…. There must be a story about myself in here somewhere. Well, you would be right. First of all. I always ‘fessed up to my mistakes, as my current manager at Dell knows well (yes. I still mess up after all these years). I told my current manager the other day that CLM was my middle name. (CLM means “Career Limiting Move”). So here is my power plant “mess up” story (well one of them):
In January 1986, I returned from my Honeymoon with my new wife Kelly when I found that we had hired a new electrician. Gary Wehunt was replacing Jim Stephenson who had left the plant on February 15, 1985, which is a story all it’s own. We had just started an overhaul on Unit 1.
I remember the first Monday I spent with Gary. It was January 6, 1986 and we were working on cleaning out the exciter house on the end of the main power generator with Diana Brien (formerly Diana Lucas). We were discussing salaries and Gary was surprised to find out that I was making more than he was. Well… I had been an electrician for over 2 years and had been promoted regularly…. so I didn’t think there was anything strange about it, except that I still looked like I was only about 18 years old (even though I was 25) and Gary was about 34. I had already been promoted 4 times and my salary had gone from $7.15 to over $12 an hour.
Anyway, when that first Friday rolled around, Gary and I were assigned to Substation Inspection. Some later time I may go into the details of what “Substation Inspection” entails, but for now, let’s just stick with my “911 call.” It is enough to say that we were in the main plant substation relay house on Friday January 10, 1986 at 9:00 am. One of our jobs was to call other substations and perform a test called a “Transfer Trip and Carrier Test”. We had called Woodring Substation (Woodring is a town in Oklahoma and we had a 345 KV line going there), and I was talking to the man in the substation on the other end of the phone line.
At the same time I was showing Gary just how experienced I was at being an electrician. People had told me that you had to be a plant electrician for 5 years before you really became a “first class” electrician. Well. Here I was at 2 years, and I thought I was so good that I could do anything by now…. — Yeah… right. I told the guy on the other end of the line as I turned a switch…. Amber light… Back to Blue…. and I wrote down the value on the meter (paperwork… oh yes…. it’s that important. Like A-1 sauce).
Then I reached for the second switch. I said, “Carrier test”, then turned the switch. The lights in the relay house went out and we were in the dark. I told the guy on the other end of the line….. “Well. That’s not supposed to happen.” Then as I let go of the switch and it returned to it’s normal position, the lights turned back on. Okay……
I wrote the numbers down from the meter and said goodbye to the other faceless substation man on the other end of the line that I talked to over 100 times, but never met in person. He sounded like a nice guy. Then I headed for the gray phone. I heard the Shift Supervisor paging Leroy Godfrey (The Electrical Supervisor) on line 2 (we had 5 Gray phone lines. The Gray Phone was our PA system).
When I picked up the line I heard Leroy pick up the phone and the Shift Supervisor tell Leroy that we just lost station power in the main substation and it had switched over to Auxiliary power. I immediately jumped in and said, “Jim (for Jim Padgett, the Shift Supervisor), I did that. I was performing a Carrier test with Woodring and the moment I performed the carrier test the lights went out.” Leroy chimed in by saying, “That wouldn’t cause you to lose station power.”
Well, in my ‘inexperienced’ plant electrician way, I responded, “Well. All I know is that when I turned the switch to perform the carrier test, the lights went out, and when I let go of the switch, the lights came back on.” Leroy reiterated, “That wouldn’t cause you to lose station power.” I replied with, “I’m just saying….” and left it at that. I had done my job. They knew I was out here. They knew I had called 911 right away. I explained what I was doing…. they could take it from there.
I had hoped that I had showed Gary upfront that it doesn’t hurt to report your mistakes (even though I hadn’t made one as far as I could tell), but I was 100% sure I had done something to cause the relay house to lose power. Though, I couldn’t figure out why.
After lunch, Bill Bennett, our A foreman came down to the shop to tell me that they figured out how the substation lost station power. He said that a road grader had been grating the road down by the Otoe-Missouri reservation (which is actually called “Windmill road” I guess because there is a windmill down that road somewhere), and had hit an electric pole and knocked it over and had killed the power to the substation.
Substation Power Interrupting Road Grader
It turned out that the substation relay house was fed by a substation down that road where we have a radio tower. So, think about this. The exact time that I turned that switch in the substation, a road grater 2 1/2 miles away hits a telephone pole accidentally and knocks it to the ground and kills the power to the substation at the exact same time that I am performing a transfer-trip and Carrier test with Woodring Substation, and the time it takes to switch to auxiliary power is the exact time it took me to let go of the switch.
Don’t tell me that was by accident. I will never believe it. I think it was for the soul purpose of teaching me a useful lesson or two. First….. don’t be afraid to tell someone when you do something wrong. Second…. If you think you have control over the things that happen to you in your life… well, think again…… Third….. God watches you every moment, and if you let him, he will guide you to do the right thing when the time comes.
God bless you all.
COMMENTS FROM THE ORIGINAL POST:
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Monty Hansen January 26, 2013
I had a similar thing happen to me, I was upgrading to shift foreman & system called to remove a tag in the switchyard & put the switch back to auto. The tag on the pistol grip was attached with a plastic zip tie & the previous operator had put it on real tight, as I was wrestling it off with my leatherman, the pliers slipped & I banged my elbow into the control panel, at that very instant there was a loud BANG as several 345 KV breakers opened simultaniously in the swithyard, I had the phone pinched between my shoulder & ear as I was wrestling with this switch & talking to the system control operator, he said a few bad words – gotta go – & hung up. The power plant lost all power & went in the black, I, of course was just sick in the pit of my stomach, after we got power restored, the plant back on etc. I called system back to see if they found the cause & fess up to causing the trip (I figured I must have caused a trip relay to close when I hit the panel) – anyway a crane at a plant down the road had got it’s boom tangled in the power line & went to ground – AT PRECISELY THE INSTANT MY ELBOW SLIPPED & HIT THE PANEL!!
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Ron Kilman January 26, 2013
Some great illustrations of the truth in Proverbs 28:13 “He who conceals his transgressions will not prosper, But he who confesses and forsakes them will find compassion”.
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justturnright January 28, 2013
CLM: I can relate.
My first boss 30 years ago once told me he was going to officially nickname me “I’m sorry” (and make me wear it for a name badge) if I said it one more time.
Hey, there’s worse things.
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Roomy January 29, 2013
I had not thought about Mike Rose in years. He was a good guy to work with, now Rivers was a different story!!!
Sub checks, I used to love to do sub checks. I performed pilot wire & transfer trip checks for years. I hated it when they went to being done by automation.
Thanks for bringing back old memories.
Importance of Power Plant Backup Battery Preventative Maintenance
The very last thing I ever learned in High School was the importance of Backup Battery Preventative Maintenance. In fact, the entire senior class of 1978 at Rockbridge High School in Columbia, Missouri learned this lesson at the same time. It was during the graduation ceremony in May while the students were walking across the stage to receive their diplomas.
I had already received mine and I was back in my seat sitting between Tracy Brandecker and Patrick Brier (we were sitting alphabetically. My name is Breazile). Pat was sitting on my left and Tracy was on my right. We were grinning from ear-to-ear to be graduating. My friends from the second grade, Mark Schlemper, Russell Somers and Brent Stewart had just walked across the stage in the gymnasium while a storm raged outside. As my friend from the fifth grade forward, Matt Tapley was walking across the stage there was a loud crack of thunder and the sound of an explosion as the lights went out.
Matt Tapley has albinism, giving him white hair and skin. In his black robe, the entire class witnessed Matt’s head bobbing up and down in the faint light given off from the emergency lights to either side of the stage as he was bowing to his classmates. We all clapped. The clapping soon turned to laughter as the emergency lights quickly dimmed and went entirely out within a minute.
An emergency light
As we sat in total darkness waiting for some resourceful faculty member to make their way to the hidden fallout shelter in the basement of the school to retrieve the portable generator and a spotlight, I was amazed by how quickly the emergency lighting had failed. The transformer to the school had been destroyed by the lightning strike so we finished the ceremony by the light of the large spotlight from the back of gym. My thought was that the school is only 4 years old and already the emergency lighting is too old to stay lit long enough to even begin evacuating the building, if that was what we had intended to do.
Fast forward to the spring of 1984. I had become an electrician a few months earlier. As I was learning the electrical ropes, I learned the importance of Preventative Maintenance in a power plant setting. The majority of an electrician’s job when I first joined the electric shop was doing “Preventative Maintenance”. I have some horror stories of bad preventative maintenance that I will share much later. I will point out now that most Americans know of some stories themselves, they just don’t realize that the root cause of these major failures were from a lack of preventative maintenance.
A power plant, like the emergency lights in the High School, has a battery backup system, only it is on a grand scale. There are backup batteries for every system that needs to remain online when there is a total blackout of power. These batteries needed to be inspected regularly. We inspected them monthly.
At first, I had done battery inspections with various electricians. Some people didn’t seem to take this task very seriously. I remember that when I did the inspections with Mike Rose, he usually finished by taking a gallon of soda water (a gallon of water with a box of baking soda dissolved into it) and pouring it all over the batteries.
My bucket buddy, Diana Lucas (Dee), on the other hand, took a different approach. We carefully filled each cell with just the right amount of distilled water. Then she showed me how to meticulously clean any corrosion from the battery posts using a rag soaked in the soda water, and then she would paint the area on the post where the corrosion was with No-Ox grease.
A jar of No-Ox Grease (No-Ox means No Oxide)
When I say batteries, you may think that I’m talking about batteries like you have in your car, or even in a large piece of equipment like a big dirt mover. Some of the batteries were the size of a battery used in a large dozer or dirt mover:
A battery used in a large dozer
Some of the batteries that we inspected were of this type. They were usually hooked up to generators that could be started up in case all the power was out and we needed to start up a diesel generator. However, this was just the puppies when it came to the Station Power Batteries. These were some serious batteries:
These are the type of UPS Station batteries used at the plant. The battery shown on the left is about the size of a small file cabinet
As big as these batteries are, it takes 58 of them for each system to come up with a 130 volt circuit. That’s right. 58 of these batteries all in a series. The station batteries are all in rooms by themselves known as…. “Unit 1 and Unit 2 Battery rooms”. Smaller station battery sets are found at different locations. Today, those places include the relay house in the main substation, the Microwave room on the roof of #1 boiler. The River pumps, the radio tower building, the coalyard switchgear, Enid Turbine Generators and the Co-Generation plant in Ponca City. I’m sure I’m leaving some out. Maybe a current electrician at the plant can remind me of the others in a comment below. Each of these locations have approximately 58 station batteries.
While I was still a novice electrician, one morning in May I was told that I was going with Dee and Ben Davis to Enid to a Battery training class at an electric company office where the manufacturer (C&D) was going to go over the proper maintenance of the station batteries. Ben drove the pickup. I remember sitting in the middle between Dee and Ben both going and coming back from our lesson on Battery Preventative Maintenance….
Interesting that Ben was sitting to my left and Dee to my right that day… just like Pat and Tracy during the graduation ceremony 6 years earlier to the month when we first learned the impact of bad preventative maintenance on backup batteries. This time we were learning how to prevent the problem I had witnessed years before. I don’t know why I draw parallels like that. It just seem to make life a little neater when that happens. I don’t remember Ben and Dee grinning ear-to-ear like Pat and Tracy were the night we graduated from High School, but I can assure you, I was the entire 45 minutes going to Enid and the 45 minutes going back to the plant.
Since I had been trained for battery maintenance, I suppose it was like Andy Griffith becoming the Permanent Latrine Orderly (PLO) in the movie “No Time For Sergeants”. I was able to go to town inspecting all kinds of backup batteries.
Andy Griffith as Permanent Latrine Orderly in No Time for Sergeants grinning ear-to-ear
Gene Roget (pronounced with a french accent as “Row Jay” with a soft J) was a contract electrician when I first became an electrician in the shop. I wrote about him in the post New Home in the Power Plant Electric Shop. He was a great mentor that taught me a lot about how to be an electrician. He taught me how to use all the different tools in my tool bucket. He taught me how to bend conduit and make it come out the right length on both ends…
He especially taught me the importance of doing a “pretty” job when running wire or conduit or just rewiring a motor. I remember Gene stopping one day when we were walking to the precipitator and he paused to look up at the transfer tower. I asked him where he was looking. He said, “I’m just admiring the wonderful job someone did bending that set of conduit. that’s a perfect job! Just perfect!”
Anyway, Gene and I were given the task of checking all the batteries in the emergency lights throughout the plant. It happened that the emergency lights at the plant were all about 5 years old. Probably about the same age as the lights were in the high school the night of our graduation. The lights in the plant had wet cells. Which meant that you had to add distilled water to them like you do in your car, or in the station batteries. This amounted to a pretty large task as there were emergency lights stationed throughout the plant.
We found many of the lights that would never have been able to light up enough to cause a cockroach to run for cover. We took the bad ones back to the shop to work on them. A lot of the batteries had gone bad because they had never been checked. They have a built-in battery charger, and some of the chargers were not working. I drew a wiring diagram of the charger so that we could troubleshoot them and replace components that had gone bad.
All of this was like a dream to me. At the time I couldn’t think of any other place I would rather be. I loved taking things that were broken and fixing them and putting them back into operation. Eventually we decided to change the emergency light batteries to dry batteries. Those didn’t need water. We could pull out the six wet cells from each emergency light box and just plug the new batteries in place. This made a lot more sense. Who has time to go around regularly and check 50 or 60 emergency lights every 3 months? Not us. Not when we were trying to save the world.
Back to the Station Batteries:
Just to give you an idea of how important these batteries are, let me tell you what they are used for…. Suppose the power plant is just humming along at full power, and all of the sudden, the power goes out. It doesn’t matter the reason. When there is a blackout in a city, or a state, be assured, the power plant itself is in a blackout state as well. After all, the power plant is where the electricity is being created.
In the plant there is large equipment running. The largest and most valuable piece of equipment by far in a power plant is the Turbine Generator. The entire plant exists to spin this machine. As big as it is, it spins at 3600 revolutions per minute, or 60 times each second. In order to do that, oil has to be flowing through the bearings otherwise they would burn up almost instantly. This would cause the generator to come to a screeching halt — and I mean “screeching!”
A turbine Generator Room at a nuclear power plant with a waxed floor!
So, in order to stop a turbine generator properly, when a unit is taken offline, once it has coasted to a smooth stop, the turbine has to be engaged to something called a “Turning Gear” which slowly rotates the turbine generator. This is turned off only when the shaft has cooled down. Without this, you might as well call General Electric and order a new one.
So, one of the most important things the station batteries do is run emergency oil pumps that engage immediately when the power is cutoff from the plant. This allows the turbine generator and other important equipment throughout the plant to slowdown and come to a stop gracefully in case the power is instantly gone.
I will write a story later about a day when this happened at our plant. The moments of confusion, and the quick decisions that had to be made to keep the unit 1 boiler from melting to the ground. Rest assured that throughout this time, the emergency oil pumps had kicked in. The station batteries did their job when they were called upon. While the control room operators were performing their emergency tasks to the letter and the electricians were scrambling to come up with a workable solution to an unforeseen problem, the turbine-generator, the PA (Primary Air) fans, the FD (Forced Draft) Fans, the ID (Induction) fans were all coasting down as the groundwork was being laid to quickly restore power.
Someone in an office in the middle of Oklahoma City may have noticed their lights flicker for a moment. Maybe they dimmed slightly…
If not for the proper maintenance of the power plant station batteries, the lights would have possibly gone dark. Someone would have had to go looking for the portable generator and the spotlight. Ceremonies in progress may have to continued under candlelight.
Lifecycle of a Power Plant Lump of Coal
Originally posted August 16, 2013:
Fifty Percent of our electricity is derived from coal. Did you ever wonder what has to take place for that to happen? I thought I would walk through the lifecycle of a piece of coal to give you an idea. I will not start back when the it was still a tree in a prehistoric world where dinosaurs grew long necks to reach the branches. I will begin when the large scoop shovel digs it out of the ground and loads it onto a coal truck.
The coal is loaded onto trucks like these before it is dumped onto the train cars. This photo was found at http://www.gillettechamber.com/events/eventdetail.aspx?EventID=2827
The coal for the power plant in North Central Oklahoma came from Wyoming. There were trains from the Black Thunder Mine and the Powder River Basin.
Coal Trains on their way to power plants
It’s a long ride for the lump of coal sitting in the coal train on it’s way to Oklahoma. Through Nebraska and Kansas. It’s possible for the coal to be visited by a different kind of traveler. One that we may call “A tramp.” Someone that catches a ride on a train without paying for the ticket.
One time a tramp (or a hobo, I don’t remember which), caught a ride on one of our coal trains. They forgot to wake up in time, and found their self following the lumps of coal on their next phase of the journey. You see. Once the coal reached the plant, one car at a time enters a building called the “Rotary Dumper”.
A rotary dumper much like the one that was at our Power Plant
As each train car enters the dumper four clamps come done on the car and it rolls upside down dumping the coal into a bin below. Imagine being a tramp waking up just in time to find yourself falling into a bin full of coal. with a car full of coal dumping coal on top of you. One coal car contained 102 tons of coal (today they carry 130 tons). Today one train contains 13,300 tons of coal. This is over 26 million pounds of coal per train.
Miraculously, this passenger survived the fall and was able to call for help or someone saw him fall. He was quickly rescued and brought to safety. Needless to say, the tramp went from being penniless to being, “comfortable” very quickly. I don’t know that it made the news at the time. I think the electric company didn’t want it to become “viral” that they had dumped a hobo into a coal bin by accident. Well. They didn’t know what “going viral” meant at the time, but I’m sure they had some other phrase for it then.
Ok. Time for a Side Story:
Since I’m on the subject of someone catching a clandestine ride on a train, this is as good of a place as any to sneak in the tragic story of Mark Meeks. Well. I say it was tragic. When Mark told the story, he seemed rather proud of his experience. You see. Mark was a construction electrician. He hired on as a plant electrician in order to settle down, but in his heart I felt like he was always a construction electrician. That is, he didn’t mind moving on from place to place. Doing a job and then moving on.
Mark explained that when he was working at a construction job in Chicago where he worked for 2 years earning a ton of overtime, he figured that by the time he finished he would have saved up enough to buy a house and settle down. He was married and living in an apartment in Chicago. He didn’t spend much time at home as he was working 12 hour days at least 6 days each week. He figured that was ok, because when he was done, he would be set for life.
Unknown to him at the time, each morning when he woke up before the crack of dawn to go to work, his wife would drive to O’Hara airport and catch a plane to Dallas, Texas where she was having an affair with some guy. By the time Mark returned from work 14 hours later, she was back home. Each day, Mark was earning a ton of overtime, and his wife was burning it on airline tickets.
When the two years were over, Mark came home to his apartment to collect his wife and his things and go live in peace in some small town some where. That was when he learned that his wife had been having the affair and using all his money to do it. She was leaving him. Penniless.
Completely broke, Mark drifted around for a while. Finally one day he saw a train that was loaded down with wooden electric poles. Mark figured that wherever those poles were going, there was going to be work. So, he hopped on the train and traveled all the way from Minneapolis Minnesota riding in the cold, wedged between some wooden poles on one of the cars on the train.
The train finally arrived at its destination somewhere at a port in the Gulf of Mexico. I don’t remember if it was Mississippi or Louisiana. He watched as they unloaded the poles, waiting to see what jobs were going to be needed for whatever the poles were for. He watched as they took the large wooden poles and piled them up in the ocean. They were using them to build up the shoreline. There were no jobs.
It is when you have been beaten down to the point of breaking when you reach a very important point in your life. Do you give up, or do you pick yourself up and make something of yourself? Mark chose the latter. He was a natural fighter. He eventually ended up at our plant as contract help, and then was hired as a plant electrician.
End of side story.
Let’s follow the lump of coal after it is poured out of the coal train in the dumper…
The coal is fed onto a conveyor belt. Let’s call this Conveyor 1, (because that is what we called it in the plant). This has a choice to feed it onto belt 2 which leads up to the stack out tower, or it can feed the other way to where some day it was planned to add another conveyor with another stackout tower. This was going to go to a pile of coal for two other units that were never built.
Anyway, when the coal drops down on Conveyor 2, way under ground, it travels up to the ground level, and continues on its way up to the top of the stackout tower where it feeds onto Belt 3. Belt 3 is a short belt that is on an arm that swings out over the coal pile. The coal is fed onto the coal pile close to the stack out tower. I suppose it is called stack out, because the coal is stacked up next to the tower.
A view of the coalyard from the top of the Smoke Stack. The tower with the conveyor running up to the top is the stack out tower. Belt 3 is the arm pointing to the right in this picture
Anyway, there are large dozers (bulldozers) and dirt movers that pickup the coal and spread it out to make room for more coal from more coal trains. As mentioned above. One train now carries 26 million pounds of coal.
Dirt Mover full of coal
the coal that is spread out on the coal pile has to stay packed down otherwise it would spontaneously combust. That is, it would catch on fire all by itself. Once coal on a coal pile catches on fire it is impossible to “reasonably” put out. You can spray all the water on it you want and it won’t go out. When a fire breaks out, you just have to drag the burning coal off of the pile and let it burn out.
In order to keep the coal from performing spontaneous combustion, the dirt movers kept it packed down. As long as the coal is packed tight, air can’t freely reach the buried coal, and it doesn’t catch fire. So, dirt movers were constantly driving back and forth on the coal pile to keep the coal well packed. Even on the picture of the coalyard above from the smoke stack, you can see two pieces of heavy equipment out on the coal pile traveling back and forth packing the coal.
Anyway, the next phase in the life of the lump of coal happens when it finds itself directly under the stack out tower, and it is fed down by a vibratory feeder onto a conveyor. In our plant, these belts were called, Belts 4, 5, 6 and 7. Belts 4 and 5 fed onto Belt 8 and belts 6 and 7 fed onto belt 9.
Belts 8 and 9 brought the coal up from under the coal pile to the top of the Crusher tower. In the picture above you can see that tower to the right of the stack out tower with the long belts coming from the bottom of the tower toward the plant. The crusher tower takes the large lumps of coal that can be the size of a baseball or a softball and crushes it down to the size of marbles and large gumballs.
Coal conveyor carrying coal to the coal silos from the coalyard. This is the size of the coal after it has been crushed by the crusher
From the crusher tower the lump of coal which is now no more than a nugget of coal travels from the coal yard up to the plant on belts 10 and 11.
conveyor 10 and 11 are almost 1/2 mile long
Up at the top of this belt in the distance you can see another tower. This tower is called the Transfer tower. Why? Well, because it transfers the coal to another set of belts, Belt 12 and 13. You can see them going up to the right to that tower in the middle between the two boilers.
The tower between the two boilers is called the Surge Bin tower. That basically means that there is a big bin there that can hold a good amount of coal to feed to either unit. At the bottom of the white part of the tower you can see that there is a section on each side. This is where the tripper galleries are located. There are two belts in each tripper, and two belts that feed to each tripper belt from the surge bin. So, just to keep counting, Belts 14 and 15 feed to unit one and belts 16 and 17 feed to unit 2 from the surge bin. then Belts 18 and 19 are the two tripper belts that dump coal into the 6 silos on unit one, while belts 20 and 21 feed the silos on unit 2.
Once in the Coal silos, the coal is through traveling on belts. The silos are positioned over things called bowl mills. The coal is fed from the silo into the bowl mill through something called a Gravimetric feeder, which is able to feed a specific amount of coal into the bowl mill. This is the point that basically decides how hot the boiler is going to be.
Once the coal leaves the gravimetric feeder and drops down to the bowl mill, it is bound for the boiler. The gravimetric feeder is tied right to the control room. When they need to raise load more than just a minimal amount, a control room operator increases the amount of coal being fed from these feeders in order to increase the flow of coal into the boiler….. I don’t know… maybe it’s more automatic than that now…. The computer probably does it these days.
When the nugget of coal falls into the bowl mill the long journey from the coal mine in Wyoming is almost complete. Its short life as a nugget is over and it is pulverized into powder. The powder is finer than flour. Another name for a bowl mill is “Pulverizer”. The coal comes from the Powder River Basin in Wyoming and just before it is consumed in Oklahoma it really does become powder.
Big rollers are used to crush the coal into fine particles. The pulverized coal is blown up pipes by the primary air fans and blown directly into the boiler where they burst into flames. A bright orange flame. The color reminds me of orange sherbet Ice cream.
The color of the fireball in the boiler
At this point an incredible thing happens to the coal that so many years ago was a part of a tree or some other plant. The chemical process that trapped the carbon from the carbon dioxide millions of years earlier is reversed and the carbon is once again combined to the oxygen as it was many millennium ago. A burst of heat is released which had been trapped after a cooling effect below the tree as it sucked the carbon out of the environment way back then.
The heat is transferred to the boiler tubes that line the boiler. The tubes heat the water and turn it into steam. The steam shoots into the turbine that turns a generator that produces the electricity that enters every house in the country. The solar power from eons ago that allowed the tree to grow is being used today to power our world. What an amazing system.
To take this one step further, the carbon dioxide that is released into the atmosphere today is replenishing the lost carbon dioxide from many years ago. Back when plants could breathe freely. Back before the carbon dioxide level was depleted almost to the point of the extinction of plant life on this planet. Remember, what we look on as a pollutant and a poison, to a plant is a chance to grow. The Sahara desert used to be a thriving forest. Maybe it will be again some day.
So, there is the question of global warming. We humans are so short sighted sometimes. We want to keep everything the same way we found it when we were born. We try desperately to keep animals from becoming extinct. We don’t think about the bazillions (ok, so I exaggerate) of animals that were extinct long before man arrived. It is natural for extinction to occur. That is how things evolve. We are trying to keep a system the same when it has always been changing.
Years from now we may develop ways to harness the energy from the sun or even from the universe in ways that are unimaginable today. When that time arrives, let’s just hope that we remain good stewards of the world so that we are around to see it. I believe that the use of fossil fuels, (as odd as that may seem) is a major step in reviving our planet’s natural resources.
Comments from the previous repost:
Glad Mark fought the good fight, still a sad story.
Antion August 21, 2014
Great read. I love knowing how things work. As I read the sad story of the traveling electrician, I kept wondering if she could have pulled that off in today’s world of air travel.
when I went to the Christian College in Eugene Oregon, they forced me to take a course in biology at the University of Oregon. I willingly sat and listened to the mix of science and evolution. I admit their perspective was intriguing.
at the end of the class, the last day, the instructor asked each one of her students to tell how the class had affected their thinking.
each one gave the politically correct answer in a variety of form. all the while I sat joyfully waiting my turn.
my response hushed the class for a moment. (it’s been some decades ago so I have to paraphrase but let it be sufficient) “I’m impressed with all the material you’ve covered. it’s astounding to think of all the things that were. but for me this class has only glorified my God. because I realize that in his wisdom he created gasoline for my car.”
you’ve covered a lot of material in your post. and I’m impressed at your diligence to complete it. I thank God for His faithfulness that he has put into you. may He prosper your testimony for the glory of His Holy Son.
By His Grace
(please overlook the syntax errors in this reply it was generated on a mobile device)
We processed several hobo’s through our coal system, & injured a few, but none ever got anything from the power company. I remember we would always worried about finding a chunk of scalp or something in the grating where the tripper car drops coal down into the silo. One especially memorable event was when a coal yard operator found a down vest jacket on the coal pile and bragged about how lucky he was to find this jacket, the size even fit, but the jacket did smell a little funny. yes it was ripped off the body of a hobo by the plow above conveyor one & shot out onto the coal pile by the stackout conveyor.
It was always unnerving to have a pull cord go down in the middle of the night deep down in the coal trestle, while the belts were shut down. You’d have to go down there alone, in the dark & reset the pull cords, so the belts could be started later when needed. You knew it wasn’t a trick because the whole crew had been up in the control room together eating dinner or something. You always wondered if you might run into a real hobo – or the ghost of one.
Doing Dew Point Tests and Lowering Expectations
Originally posted May 9, 2014:
There were times when I was working at the Coal-Fired Power Plant in North Central Oklahoma when I wondered if there was anything that we couldn’t do. Surrounded by True Power Plant Men I found that when we were facing a seemingly impossible task, a Power Plant Man would come up with an extremely creative solution to the problem. One such example was during the “We’ve Got The Power” program. I talked about this program in an early post called “Power Plant We’ve Got the Power Program” so I won’t go into detail here about the program itself. I will just say that we broke out into teams to find creative ways to operate more efficiently, and to cut costs.
I was a team leader of our team, and looking back I must have had two criteria in mind when I picked the team members that would be on my team. The first would have been that they were True Power Plant Men (and woman) with a higher than average intelligence. The second criteria would have been that they were friends of mine. I say this, because everyone on my team fit the bill.
During out team meetings, Terry Blevins would often say some bombastic statement that the average person may be inclined to dismiss immediately as being absurd. I say that because I remember more than once thinking that what Terry had just said wouldn’t amount to much. As it turned out, our biggest money saving ideas were those truly bombastic statements that Terry was making. One such idea had to do with the heaters on the precipitators that kept the hoppers and the insulators on the roof too hot to collect moisture.
The Precipitator is a very large box that takes the ash out of the exhaust before it goes out of the smoke stack (how many times have I made that statement in the last two years?). Anyway, the exhaust from the boiler after the coal has been turned to ash in the fireball in the boiler contains a large amount of moisture. The last thing you want to happen is for the temperature of the flue gas to fall below the dew point. When that happens, moisture collects on the structure in a form of… well… of Acid Rain. Basically eating away the precipitator and the duct work from the inside.
Somewhere along the line, it had been determined that the dewpoint of the flue gas was not higher than 250 degrees. So, as long as the structure was at least 250 degrees, no moisture would be collected. Four heaters were mounted on each of the 84 hoppers (on each of the two precipitators) and heaters were mounted on the roof around each of the insulators that held up the wire racks on both ends.
When Terry walked into the office to attend one of our first “We’ve Got The Power” team meetings, he said, I think we could save a lot of money if we did something about the heaters on the precipitator. — He may remember being greeted with blank stares (at least from me). Um. Ok. Heaters on the precipitator. I knew they were everywhere, but I never gave them much thought.
I think Terry could tell right away that I hadn’t taken his idea seriously. I don’t know. Maybe he was bothered by the sound of my eyeballs rolling around in circles as if someone has conked me on the head. So, he explained his idea further. He pointed out that the roof heaters on just one of the precipitators used about 211 kilowatt-hours and the hopper heaters used about 345 kilowatt-hours. Together it more than half a Megawatt of power. — This definitely caught our attention. That meant that between both of the Precipitators (since we had two boilers at our plant), we could possibly save over a Megawatt of electricity every hour we could shut down the heaters.
The plant has a similar electrostatic precipitator, only ours is twice as long
After discussing all the aspects of the idea, we decided that in order for the idea to have any merit, we had to know if the dew point really was around 250 degrees, or was it possibly a lot lower. 250 degrees seemed high to begin with since the boiling point of water is 212 degrees. If lower, then we could have a workable idea. Originally, I wanted to tackle the task of finding the dew point. So, I went about it in a Science Experiment sort of way.
I figured that if we were able to lower the temperature of the flue gas to a known temperature below the dewpoint, and by knowing the volume of the gas, and the amount of liquid we could condense out of it, we could determine (possibly) the dew point. So, I brought my Graham Condenser to work, and Scott Hubbard and I went up to the 250 foot landing on the smoke stack with the intent of sucking a known amount of exhaust from the smoke stack while the unit was at full load.
Scott Hubbard
We would run it through the condenser while running cool water through it to lower the temperature.
The Exact Graham Condenser used in our experiment Spring 1990 (and that’s my hairy hand in this selfie)
I could measure the output of the vacuum pump by filling up an inverted Erlemeyer flask with water and then letting the flue gas displace the water. — I always loved doing experiments like this in the 9th grade science glass with Mr. Godfrey our Physical Science Teacher (Donna Westhoff, who may sometimes read this blog was in my class and sat right behind me).
An Erlenmeyer Flask (from Google Images, not from my Chemistry Lab)
Ok. Side Story, since I mentioned Donna Westhoff from the 9th grade 1974-75 school year.
I knew that Donna’s father was a fire fighter, because one day during a special outing when we were with a group of bicycling Junior High School students and a teacher, we stopped at Donna Westhoff’s house to get a drink of water. On the walls in her house were different types of fire fighting treasures. Donna explained that her father was a fire fighter… That was the Spring of 1975 in Columbia, Missouri
Fast forward 16 years later (1991) at the Power Plant in the middle of nowhere in North Central Oklahoma. Just about a year after the story I’m telling now…. I left the logic room and went to catch the elevator to the Control room. When the doors opened, Tony Mena was in there with a bunch of college age students giving them a tour of the plant. I entered the elevator and turned around to face the door as it closed.
As I was standing there, I suddenly became aware that the person standing next to me was staring right at me. So, I turned to see who it was. Standing next to me was someone that looked very familiar wearing a big grin as if she knew who I was. I recognized her, and while my mind was going through filing cabinets of memories trying to index this particular person, I asked her, “Don’t I know you?” She shook her head and said, “I’m Donna Westhoff!”
A High School picture of Donna Westhoff who is on the Lower Left
As the elevator door opened and we stepped out, Donna and I began talking about what we were both doing there. She was surprised to find that I had become an electrician at a power plant instead of some kind of scientist in a lab somewhere. Donna was going to school in Stillwater where one of the best Fire Fighting Schools in the country is found. Following in her father’s footsteps, I thought. After a while I could tell that Tony was getting a little perturbed that the wisdom he was imparting about the fire protection system on the Turbine Generator wasn’t being absorbed by Donna, so I cut our conversation short. It turned out that a very good friend of hers lived just two houses from where we lived, and her friend’s mother was my landlord. Peggy Pickens.
Ok. End of the side story, and another example of how I occasionally run into friends from my childhood in the most unexpected places (see the post: “Relay Tests and Radio Quizzes with Ben Davis“).
So. Scott Hubbard and I tried using the Graham Condenser and the Erlenmeyer Flask, but we quickly found out that this wasn’t big enough, to capture a large enough quantity. So, we increased the size of the condenser by winding a garden hose around inside of a water bucket and filling it with ice. Then we captured all the water that condensed in the hose.
A 5 gallon water bucket we used as our condenser with a garden hose and ice
When it finally came down to it. Even though it was fun trying to do this experiment halfway up the 500 foot smoke stack, I never was able to figure out how to calculate the dew point given the data I had collected.
That’s when we decided to look at dew point sensors in the parts catalogs. If we could stick a probe down into the precipitator and measure the dew point directly in the flue gas, that would be best. After looking at a few in the catalog, Terry Blevins said he thought he could make one. So, he went to work.
Terry Blevins
The next day he came in with an inch and a half conduit with hoses hanging out the back and a homemade sensor on the other end. I won’t go into detail how the sensor was built because some day Terry may want to patent this thing because, as it turned out, it was so sensitive that it could detect my breathe from about a foot away. If I breathed out of my mouth toward the sensor, it would detect the moisture in my breath. This was perfect!
We went to work on the roof of the precipitator sticking the probe down into different sections of the precipitator. It not only measured the moisture, it also had thermocouples on it that we used to accurately measure the temperature of the sensor as we varied the temperature by blowing cold air through the conduit using the same ice bucket and hose from before.
I could go into a lot of detail about how we performed our experiments, but it would only excite me and bore you. So, let me just say that we came up with two very important results. First of all, at full load when the humidity outside was at 100% the dew point was around 150 degrees! A full 100 degrees below what the plant had originally assumed. This was very important, because a lot of energy was spent trying to keep the flue gas above 250 degrees, and just by lowering it down to 210 degrees, still a safe amount above the dew point, that extra energy could be used to create electricity.
The second thing that we discovered was that the middle sections of the precipitator was a lot cooler inside than the outer fields. We realized that this was caused by the air preheater coils that rotated between the flue gas and the Primary Air intake duct. This took the last amount of heat safely possible from the exhaust and transferred it to the air going into the boiler so that it was already hot when it was used to burn the coal. Because of the way the air preheater coils rotated, the part of the duct toward the middle of the precipitator was a lot cooler than the air on the outside.
Diagram of a boiler. See the Air Preheater? Flue Gas on one side and ambient air on the other
Lower temperatures in the precipitator increased the performance, so we decided that if we could mix the air around as it was going into the precipitator so that the outer edges were cooler, then it would increase the overall performance. One suggestion was to put a mobile home in the duct work because in Oklahoma it was a known fact that mobile homes attracted tornadoes and it would probably cause a tornadic reaction that would mix up the flue gases. — We just couldn’t figure out how to convince management to put a mobile home in the duct between the economizer and the precipitator.
Thanks to Terry’s handy dandy Dew Point Sensor, we were able to prove that the hopper and roof heaters could be lowered to where we set the thermostat at 180 degrees. At that setting the heaters that used to always run at 250 degrees would remain off anytime the ambient temperature was above 45 degrees. In Oklahoma, that is most of the year. This turned out to save over $350,000 per year in energy savings at a cost of about 1.5 cents per kilowatt-hour. Not to mention the unknown savings from being able to lower the flue gas temperature by 40 degrees.
Lifecycle of a Power Plant Lump of Coal
Originally posted August 16, 2013:
Fifty Percent of our electricity is derived from coal. Did you ever wonder what has to take place for that to happen? I thought I would walk through the lifecycle of a piece of coal to give you an idea. I will not start back when the it was still a tree in a prehistoric world where dinosaurs grew long necks to reach the branches. I will begin when the large scoop shovel digs it out of the ground and loads it onto a coal truck.
The coal is loaded onto trucks like these before it is dumped onto the train cars. This photo was found at http://www.gillettechamber.com/events/eventdetail.aspx?EventID=2827
The coal for the power plant in North Central Oklahoma came from Wyoming. There were trains from the Black Thunder Mine and the Powder River Basin.
Coal Trains on their way to power plants
It’s a long ride for the lump of coal sitting in the coal train on it’s way to Oklahoma. Through Nebraska and Kansas. It’s possible for the coal to be visited by a different kind of traveler. One that we may call “A tramp.” Someone that catches a ride on a train without paying for the ticket.
One time a tramp (or a hobo, I don’t remember which), caught a ride on one of our coal trains. They forgot to wake up in time, and found their self following the lumps of coal on their next phase of the journey. You see. Once the coal reached the plant, one car at a time enters a building called the “Rotary Dumper”.
A rotary dumper much like the one that was at our Power Plant
As each train car enters the dumper four clamps come done on the car and it rolls upside down dumping the coal into a bin below. Imagine being a tramp waking up just in time to find yourself falling into a bin full of coal. with a car full of coal dumping coal on top of you. One coal car contained 102 tons of coal (today they carry 130 tons). Today one train contains 13,300 tons of coal. This is over 26 million pounds of coal per train.
Miraculously, this passenger survived the fall and was able to call for help or someone saw him fall. He was quickly rescued and brought to safety. Needless to say, the tramp went from being penniless to being, “comfortable” very quickly. I don’t know that it made the news at the time. I think the electric company didn’t want it to become “viral” that they had dumped a hobo into a coal bin by accident. Well. They didn’t know what “going viral” meant at the time, but I’m sure they had some other phrase for it then.
Ok. Time for a Side Story:
Since I’m on the subject of someone catching a clandestine ride on a train, this is as good of a place as any to sneak in the tragic story of Mark Meeks. Well. I say it was tragic. When Mark told the story, he seemed rather proud of his experience. You see. Mark was a construction electrician. He hired on as a plant electrician in order to settle down, but in his heart I felt like he was always a construction electrician. That is, he didn’t mind moving on from place to place. Doing a job and then moving on.
Mark explained that when he was working at a construction job in Chicago where he worked for 2 years earning a ton of overtime, he figured that by the time he finished he would have saved up enough to buy a house and settle down. He was married and living in an apartment in Chicago. He didn’t spend much time at home as he was working 12 hour days at least 6 days each week. He figured that was ok, because when he was done, he would be set for life.
Unknown to him at the time, each morning when he woke up before the crack of dawn to go to work, his wife would drive to O’Hara airport and catch a plane to Dallas, Texas where she was having an affair with some guy. By the time Mark returned from work 14 hours later, she was back home. Each day, Mark was earning a ton of overtime, and his wife was burning it on airline tickets.
When the two years were over, Mark came home to his apartment to collect his wife and his things and go live in peace in some small town some where. That was when he learned that his wife had been having the affair and using all his money to do it. She was leaving him. Penniless.
Completely broke, Mark drifted around for a while. Finally one day he saw a train that was loaded down with wooden electric poles. Mark figured that wherever those poles were going, there was going to be work. So, he hopped on the train and traveled all the way from Minneapolis Minnesota riding in the cold, wedged between some wooden poles on one of the cars on the train.
The train finally arrived at its destination somewhere at a port in the Gulf of Mexico. I don’t remember if it was Mississippi or Louisiana. He watched as they unloaded the poles, waiting to see what jobs were going to be needed for whatever the poles were for. He watched as they took the large wooden poles and piled them up in the ocean. They were using them to build up the shoreline. There were no jobs.
It is when you have been beaten down to the point of breaking when you reach a very important point in your life. Do you give up, or do you pick yourself up and make something of yourself? Mark chose the latter. He was a natural fighter. He eventually ended up at our plant as contract help, and then was hired as a plant electrician.
End of side story.
Let’s follow the lump of coal after it is poured out of the coal train in the dumper…
The coal is fed onto a conveyor belt. Let’s call this Conveyor 1, (because that is what we called it in the plant). This has a choice to feed it onto belt 2 which leads up to the stack out tower, or it can feed the other way to where some day it was planned to add another conveyor with another stackout tower. This was going to go to a pile of coal for two other units that were never built.
Anyway, when the coal drops down on Conveyor 2, way under ground, it travels up to the ground level, and continues on its way up to the top of the stackout tower where it feeds onto Belt 3. Belt 3 is a short belt that is on an arm that swings out over the coal pile. The coal is fed onto the coal pile close to the stack out tower. I suppose it is called stack out, because the coal is stacked up next to the tower.
A view of the coalyard from the top of the Smoke Stack. The tower with the conveyor running up to the top is the stack out tower. Belt 3 is the arm pointing to the right in this picture
Anyway, there are large dozers (bulldozers) and dirt movers that pickup the coal and spread it out to make room for more coal from more coal trains. As mentioned above. One train now carries 26 million pounds of coal.
Dirt Mover full of coal
the coal that is spread out on the coal pile has to stay packed down otherwise it would spontaneously combust. That is, it would catch on fire all by itself. Once coal on a coal pile catches on fire it is impossible to “reasonably” put out. You can spray all the water on it you want and it won’t go out. When a fire breaks out, you just have to drag the burning coal off of the pile and let it burn out.
In order to keep the coal from performing spontaneous combustion, the dirt movers kept it packed down. As long as the coal is packed tight, air can’t freely reach the buried coal, and it doesn’t catch fire. So, dirt movers were constantly driving back and forth on the coal pile to keep the coal well packed. Even on the picture of the coalyard above from the smoke stack, you can see two pieces of heavy equipment out on the coal pile traveling back and forth packing the coal.
Anyway, the next phase in the life of the lump of coal happens when it finds itself directly under the stack out tower, and it is fed down by a vibratory feeder onto a conveyor. In our plant, these belts were called, Belts 4, 5, 6 and 7. Belts 4 and 5 fed onto Belt 8 and belts 6 and 7 fed onto belt 9.
Belts 8 and 9 brought the coal up from under the coal pile to the top of the Crusher tower. In the picture above you can see that tower to the right of the stack out tower with the long belts coming from the bottom of the tower toward the plant. The crusher tower takes the large lumps of coal that can be the size of a baseball or a softball and crushes it down to the size of marbles and large gumballs.
Coal conveyor carrying coal to the coal silos from the coalyard. This is the size of the coal after it has been crushed by the crusher
From the crusher tower the lump of coal which is now no more than a nugget of coal travels from the coal yard up to the plant on belts 10 and 11.
conveyor 10 and 11 are almost 1/2 mile long
Up at the top of this belt in the distance you can see another tower. This tower is called the Transfer tower. Why? Well, because it transfers the coal to another set of belts, Belt 12 and 13. You can see them going up to the right to that tower in the middle between the two boilers.
The tower between the two boilers is called the Surge Bin tower. That basically means that there is a big bin there that can hold a good amount of coal to feed to either unit. At the bottom of the white part of the tower you can see that there is a section on each side. This is where the tripper galleries are located. There are two belts in each tripper, and two belts that feed to each tripper belt from the surge bin. So, just to keep counting, Belts 14 and 15 feed to unit one and belts 16 and 17 feed to unit 2 from the surge bin. then Belts 18 and 19 are the two tripper belts that dump coal into the 6 silos on unit one, while belts 20 and 21 feed the silos on unit 2.
Once in the Coal silos, the coal is through traveling on belts. The silos are positioned over things called bowl mills. The coal is fed from the silo into the bowl mill through something called a Gravimetric feeder, which is able to feed a specific amount of coal into the bowl mill. This is the point that basically decides how hot the boiler is going to be.
Once the coal leaves the gravimetric feeder and drops down to the bowl mill, it is bound for the boiler. The gravimetric feeder is tied right to the control room. When they need to raise load more than just a minimal amount, a control room operator increases the amount of coal being fed from these feeders in order to increase the flow of coal into the boiler….. I don’t know… maybe it’s more automatic than that now…. The computer probably does it these days.
When the nugget of coal falls into the bowl mill the long journey from the coal mine in Wyoming is almost complete. Its short life as a nugget is over and it is pulverized into powder. The powder is finer than flour. Another name for a bowl mill is “Pulverizer”. The coal comes from the Powder River Basin in Wyoming and just before it is consumed in Oklahoma it really does become powder.
Big rollers are used to crush the coal into fine particles. The pulverized coal his blown up pipes by the primary air fans and blown directly into the boiler where they burst into flames. A bright orange flame. The color reminds me of orange sherbet Ice cream.
The color of the fireball in the boiler
At this point an incredible thing happens to the coal that so many years ago was a part of a tree or some other plant. The chemical process that trapped the carbon from the carbon dioxide millions of years earlier is reversed and the carbon is once again combined to the oxygen as it was many millennium ago. A burst of heat is released which had been trapped after a cooling effect below the tree as it sucked the carbon out of the environment way back then.
The heat is transferred to the boiler tubes that line the boiler. The tubes heat the water and turn it into steam. The steam shoots into the turbine that turns a generator that produces the electricity that enters every house in the country. The solar power from eons ago that allowed the tree to grow is being used today to power our world. What an amazing system.
To take this one step further, the carbon dioxide that is released into the atmosphere today is replenishing the lost carbon dioxide from many years ago. Back when plants could breathe freely. Back before the carbon dioxide level was depleted almost to the point of the extinction of plant life on this planet. Remember, what we look on as a pollutant and a poison, to a plant is a chance to grow. The Sahara desert used to be a thriving forest. Maybe it will be again some day.
So, there is the question of global warming. We humans are so short sighted sometimes. We want to keep everything the same way we found it when we were born. We try desperately to keep animals from becoming extinct. We don’t think about the bazillions (ok, so I exaggerate) of animals that were extinct long before man arrived. It is natural for extinction to occur. That is how things evolve. We are trying to keep a system the same when it has always been changing.
Years from now we may develop ways to harness the energy from the sun or even from the universe in ways that are unimaginable today. When that time arrives, let’s just hope that we remain good stewards of the world so that we are around to see it. I believe that the use of fossil fuels, (as odd as that may seem) is a major step in reviving our planet’s natural resources.
Comments from the previous repost:
Glad Mark fought the good fight, still a sad story.
Antion August 21, 2014
Great read. I love knowing how things work. As I read the sad story of the traveling electrician, I kept wondering if she could have pulled that off in today’s world of air travel.
when I went to the Christian College in Eugene Oregon, they forced me to take a course in biology at the University of Oregon. I willingly sat and listened to the mix of science and evolution. I admit their perspective was intriguing.
at the end of the class, the last day, the instructor asked each one of her students to tell how the class had affected their thinking.
each one gave the politically correct answer in a variety of form. all the while I sat joyfully waiting my turn.
my response hushed the class for a moment. (it’s been some decades ago so I have to paraphrase but let it be sufficient) “I’m impressed with all the material you’ve covered. it’s astounding to think of all the things that were. but for me this class has only glorified my God. because I realize that in his wisdom he created gasoline for my car.”
you’ve covered a lot of material in your post. and I’m impressed at your diligence to complete it. I thank God for His faithfulness that he has put into you. may He prosper your testimony for the glory of His Holy Son.
By His Grace
(please overlook the syntax errors in this reply it was generated on a mobile device)
We processed several hobo’s through our coal system, & injured a few, but none ever got anything from the power company. I remember we would always worried about finding a chunk of scalp or something in the grating where the tripper car drops coal down into the silo. One especially memerable event was when a coal yard operator found a down vest jacket on the coal pile and bragged about how lucky he was to find this jacket, the size even fit, but the jacket did smell a little funny. yes it was ripped off the body of a hobo by the plow above conveyor one & shot out onto the coal pile by the stackout conveyor.
It was always unnerving to have a pullcord go down in the middle of the night deep down in the coal trestle, while the belts were shut down. You’d have to go down there alone, in the dark & reset the pull cords, so the belts could be started later when needed. You knew it wasn’t a trick because the whole crew had been up in the control room together eating dinner or something. You always wondered if you might run into a real hobo – or the ghost of one.
Importance of Power Plant Backup Battery Preventative Maintenance
The very last thing I ever learned in High School was the importance of Backup Battery Preventative Maintenance. In fact, the entire senior class of 1978 at Rockbridge High School in Columbia, Missouri learned this lesson at the same time. It was during the graduation ceremony in May while the students were walking across the stage to receive their diplomas.
I had already received mine and I was back in my seat sitting between Tracy Brandecker and Patrick Brier (we were sitting alphabetically. My name is Breazile). Pat was sitting on my left and Tracy was on my right. We were grinning from ear-to-ear to be graduating. My friends from the second grade, Mark Schlemper, Russell Somers and Brent Stewart had just walked across the stage in the gymnasium while a storm raged outside. As my friend from the fifth grade forward, Matt Tapley was walking across the stage there was a loud crack of thunder and the sound of an explosion as the lights went out.
Matt Tapley has albinism, giving him white hair and skin. In his black robe, the entire class witnessed Matt’s head bobbing up and down in the faint light given off from the emergency lights to either side of the stage as he was bowing to his classmates. We all clapped. The clapping soon turned to laughter as the emergency lights quickly dimmed and went entirely out within a minute.
An emergency light
As we sat in total darkness waiting for some resourceful faculty member to make their way to the hidden fallout shelter in the basement of the school to retrieve the portable generator and a spotlight, I was amazed by how quickly the emergency lighting had failed. The transformer to the school had been destroyed by the lightning strike so we finished the ceremony by the light of the large spotlight from the back of gym. My thought was that the school is only 4 years old and already the emergency lighting is too old to stay lit long enough to even begin evacuating the building, if that was what we had intended to do.
Fast forward to the spring of 1984. I had become an electrician a few months earlier. As I was learning the electrical ropes, I learned the importance of Preventative Maintenance in a power plant setting. The majority of an electrician’s job when I first joined the electric shop was doing “Preventative Maintenance”. I have some horror stories of bad preventative maintenance that I will share much later. I will point out now that most Americans know of some stories themselves, they just don’t realize that the root cause of these major failures were from a lack of preventative maintenance.
A power plant, like the emergency lights in the High School, has a battery backup system, only it is on a grand scale. There are backup batteries for every system that needs to remain online when there is a total blackout of power. These batteries needed to be inspected regularly. We inspected them monthly.
At first, I had done battery inspections with various electricians. Some people didn’t seem to take this task very seriously. I remember that when I did the inspections with Mike Rose, he usually finished by taking a gallon of soda water (a gallon of water with a box of baking soda dissolved into it) and pouring it all over the batteries.
My bucket buddy, Diana Lucas (Dee), on the other hand, took a different approach. We carefully filled each cell with just the right amount of distilled water. Then she showed me how to meticulously clean any corrosion from the battery posts using a rag soaked in the soda water, and then she would paint the area on the post where the corrosion was with No-Ox grease.
A jar of No-Ox Grease (No-Ox means No Oxide)
When I say batteries, you may think that I’m talking about batteries like you have in your car, or even in a large piece of equipment like a big dirt mover. Some of the batteries were the size of a battery used in a large dozer or dirt mover:
A battery used in a large dozer
Some of the batteries that we inspected were of this type. They were usually hooked up to generators that could be started up in case all the power was out and we needed to start up a diesel generator. However, this was just the puppies when it came to the Station Power Batteries. These were some serious batteries:
These are the type of UPS Station batteries used at the plant. The battery shown on the left is about the size of a small file cabinet
As big as these batteries are, it takes 58 of them for each system to come up with a 130 volt circuit. That’s right. 58 of these batteries all in a series. The station batteries are all in rooms by themselves known as…. “Unit 1 and Unit 2 Battery rooms”. Smaller station battery sets are found at different locations. Today, those places include the relay house in the main substation, the Microwave room on the roof of #1 boiler. The River pumps, the radio tower building, the coalyard switchgear, Enid Turbine Generators and the Co-Generation plant in Ponca City. I’m sure I’m leaving some out. Maybe a current electrician at the plant can remind me of the others in a comment below. Each of these locations have approximately 58 station batteries.
While I was still a novice electrician, one morning in May I was told that I was going with Dee and Ben Davis to Enid to a Battery training class at an electric company office where the manufacturer (C&D) was going to go over the proper maintenance of the station batteries. Ben drove the pickup. I remember sitting in the middle between Dee and Ben both going and coming back from our lesson on Battery Preventative Maintenance….
Interesting that Ben was sitting to my left and Dee to my right that day… just like Pat and Tracy during the graduation ceremony 6 years earlier to the month when we first learned the impact of bad preventative maintenance on backup batteries. This time we were learning how to prevent the problem I had witnessed years before. I don’t know why I draw parallels like that. It just seem to make life a little neater when that happens. I don’t remember Ben and Dee grinning ear-to-ear like Pat and Tracy were the night we graduated from High School, but I can assure you, I was the entire 45 minutes going to Enid and the 45 minutes going back to the plant.
Since I had been trained for battery maintenance, I suppose it was like Andy Griffith becoming the Permanent Latrine Orderly (PLO) in the movie “No Time For Sergeants”. I was able to go to town inspecting all kinds of backup batteries.
Andy Griffith as Permanent Latrine Orderly in No Time for Sergeants grinning ear-to-ear
Gene Roget (pronounced with a french accent as “Row Jay” with a soft J) was a contract electrician when I first became an electrician in the shop. I wrote about him in the post New Home in the Power Plant Electric Shop. He was a great mentor that taught me a lot about how to be an electrician. He taught me how to use all the different tools in my tool bucket. He taught me how to bend conduit and make it come out the right length on both ends…
He especially taught me the importance of doing a “pretty” job when running wire or conduit or just rewiring a motor. I remember Gene stopping one day when we were walking to the precipitator and he paused to look up at the transfer tower. I asked him where he was looking. He said, “I’m just admiring the wonderful job someone did bending that set of conduit. that’s a perfect job! Just perfect!”
Anyway, Gene and I were given the task of checking all the batteries in the emergency lights throughout the plant. It happened that the emergency lights at the plant were all about 5 years old. Probably about the same age as the lights were in the high school the night of our graduation. The lights in the plant had wet cells. Which meant that you had to add distilled water to them like you do in your car, or in the station batteries. This amounted to a pretty large task as there were emergency lights stationed throughout the plant.
We found many of the lights that would never have been able to light up enough to cause a cockroach to run for cover. We took the bad ones back to the shop to work on them. A lot of the batteries had gone bad because they had never been checked. They have a built-in battery charger, and some of the chargers were not working. I drew a wiring diagram of the charger so that we could troubleshoot them and replace components that had gone bad.
All of this was like a dream to me. At the time I couldn’t think of any other place I would rather be. I loved taking things that were broken and fixing them and putting them back into operation. Eventually we decided to change the emergency light batteries to dry batteries. Those didn’t need water. We could pull out the six wet cells from each emergency light box and just plug the new batteries in place. This made a lot more sense. Who has time to go around regularly and check 50 or 60 emergency lights every 3 months? Not us. Not when we were trying to save the world.
Back to the Station Batteries:
Just to give you an idea of how important these batteries are, let me tell you what they are used for…. Suppose the power plant is just humming along at full power, and all of the sudden, the power goes out. It doesn’t matter the reason. When there is a blackout in a city, or a state, be assured, the power plant itself is in a blackout state as well. After all, the power plant is where the electricity is being created.
In the plant there is large equipment running. The largest and most valuable piece of equipment by far in a power plant is the Turbine Generator. The entire plant exists to spin this machine. As big as it is, it spins at 3600 revolutions per minute, or 60 times each second. In order to do that, oil has to be flowing through the bearings otherwise they would burn up almost instantly. This would cause the generator to come to a screeching halt — and I mean “screeching!”
A turbine Generator Room at a nuclear power plant with a waxed floor!
So, in order to stop a turbine generator properly, when a unit is taken offline, once it has coasted to a smooth stop, the turbine has to be engaged to something called a “Turning Gear” which slowly rotates the turbine generator. This is turned off only when the shaft has cooled down. Without this, you might as well call General Electric and order a new one.
So, one of the most important things the station batteries do is run emergency oil pumps that engage immediately when the power is cutoff from the plant. This allows the turbine generator and other important equipment throughout the plant to slowdown and come to a stop gracefully in case the power is instantly gone.
I will write a story later about a day when this happened at our plant. The moments of confusion, and the quick decisions that had to be made to keep the unit 1 boiler from melting to the ground. Rest assured that throughout this time, the emergency oil pumps had kicked in. The station batteries did their job when they were called upon. While the control room operators were performing their emergency tasks to the letter and the electricians were scrambling to come up with a workable solution to an unforeseen problem, the turbine-generator, the PA (Primary Air) fans, the FD (Forced Draft) Fans, the ID (Induction) fans were all coasting down as the groundwork was being laid to quickly restore power.
Someone in an office in the middle of Oklahoma City may have noticed their lights flicker for a moment. Maybe they dimmed slightly…
If not for the proper maintenance of the power plant station batteries, the lights would have possibly gone dark. Someone would have had to go looking for the portable generator and the spotlight. Ceremonies in progress may have to continued under candlelight.
Power Plant Men 