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Bringing up the control room panel. Most of this was prebuilt, they had already built two power plants so they had it down by this time and construction was really fast.
Control Room as seen from the connected managers office. Notice the IBM computer monitor, if I remember correctly it was probably an 8086 running DOS. It was my first introduction to computers. We had to input meter readings everynight at 10pm. These were entered into a Wordstar Spreadsheet. It's where I taught myself to become computer literate.
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Another pic from a road high above the plant, where the Trout fishing is great. The plant elevation was about 2600ft, the red buildings on the left are the lumber mill buildings. The power plant sits at the top all other buildings are covered lumber sheds or kilns.
The fuel comes from the reclaimers and drops into a metering bin. There are two bins, each has two counter rotating ribbon screws that drags the fuel to the drop leg so it falls into the combustor. As you can see, there is CO (smoke) there so the furnace must have just gone positive, it normally runs in a vacuum and going positive is NOT good. You can also see the heat damage from not only the heat that rises from combustor through the drop legs, but when the leg plugs, it can catch fire which doesn't do the metal housing any good.
The Exciter is in the fore ground and Generator behind that. The turbine can't be seen but it is attached at the other end. The pipe in the right corner of the picture, is the steam inlet for the HOG Ejector system for turbine vacuum
Another picture of the snow covered wood chip fuel pile. Unlike Auberry, Northfork did not burn to much Almond Shell. Most of our fuel was right from the mill, it was generally really good wood chips.
Control board for Northfork Energy, 12.5 mw wood burning co-generation plant. The leftside (black switches and blue controllers) of the panel controls the wood combustion and steam generation. The rightside is the Electrical side that includes the generator and sync controls.
DA, short for Deaerator Tank, it does exactly what the name implies. A deaerator is a device that is used for removing oxygen and other dissolved gases from the boiler feedwater.
I see pallets of new sand in front of the elevator. This is a startup where new sand is being put into the combustor and the preheat burner is running to warm up the sand prior to adding wood.
Main Condenser with end caps removed, the tubes are the cooling water side. The tank below is the condensate section. The steam that has exhausted from the turbine is condensed back down to water so we can reuse. It is also used in this tank to help maintain the vacuum on the turbine so this level must be maintained at a specific level so the vacuum is not broken.
Another view of the bed and nozzles. The sand and dirt below the feed chutes as seen in other pictures. You can also see all the metal lying in and around the nozzles. Even with two powerful magnets on the fuel feed belts, nails and all kinds of metal objects would end up in the bed and had to be cleaned out. You could not run extended periods of time burning this kind of fuel, weeks maybe a month.
Generator and turbine casing without the rotor and blades. The top half is upside down just to the right. No govoner or anything yet.
View from the fuel recalimers to the combustor. The belt on the right is taking fuel up and dropping it into the metering bins. Any excess fuel is returned by the overhead belt on the left and is recycled back onto the feed belt.
Another view of the fuel feed legs from the metering bins above. The line coming from the left and attached to each of the legs is forced air being pumped in to help spread the fuel out across the combustor bed as it enters.
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A little out of focus but this is the ground floor, the turbine/generator sits on the floor above. The four tanks in the fore ground are the Demineralized Water treatment section used to chemically treat the boiler water. The larger cylinder is the main turbine condenser.
Electrostatic Precipitator to the left and the Almond shell fuel pile in the back, sans snow. Look for "Auberry 1986 - Winter Fuel", to see the snow version of this picture.
Left to right, Electrostatic Precipitator, ID Fan, Multiclone. This was the back end of the combustion process. The ID Fan pulls a negative pressure on the entire combustor, it pulls the burnt ash through the multiclone, where some ash is reinjected but most is dropped into a hopper and disposed. The ash flows through the ID Fan and it is then pushed through the precipitator. The precip uses electrically charged panels to make the ash fall out of the flue stream. There are three sections and each has a hopper that collects the ash for disposal.
Cooling Tower at Northfork. Picture was probably taken from the top of the Electrostatic Precipitator.
The crisscross conveyors are the fuel feed and return from the Fuel bldg. to the Plant.
This is what you don't want to see in a Fluidized bed Combustor. Sand and dirt forming huge boulders, KLINKERS. When you were called for a klinker party, well it was usually worse than this.
Looking at the Electrostatic Precipitator and the snow covered Almond shell pile. This is the Winter version of picture "Auberry 1986 - Spring Fuel".
This is a shot from the DA deck above the control room. The room below is the maintenance room, we used the overhead crane to lift large equipment up to the turbine deck. The door straight ahead later became the Water Treatment sample testing room.
Another shot of the control room from the turbine room. The walls and doors to the control room were not in place yet. We were running this plant for about a week before the walls, doors and real windows were put in. Notice the bottom panel doors don't have their latches yet.
Turbine Generator set at Northfork, General Electric 12.5 MW. Front view of the Turbine, everything looks complete including office and control room. Plant was operational at this time. I can tell becasue on the walls are what look like smaller windows, they are blow up pictures, these pictures that I had blown up framed and hung throughout the turbine building. It was cool to walk around and see large pictures of the plant during construction.
Worker cleaning the view port into the combustor box. It can build up with klinkers, the port glass would need to be removed and the HOT suit because it is about 1700 degrees at that spot.
Front view of the combustor at Northfork. The glass in front was not really of much use except to see that flame was visible. You still had to go around back to the view ports to really view the burn. Auberry and Northfork were Fluidized Bed combustors while Dinuba was a Traveling Grate. The air was heated then pushed through nozzles to fluidize the sand to burn the wood. This picture is only showing 3 of the 4 fuel legs coming into the combustor. You can see the one on the right has been HOT before, that is the reason for the pinkish/white looking color. They were known to plug with fuel and catch fire occasionally....
These are the hex shaped air nozzles that push air from the FD fan to lift the sand and burn the wood. The dirt and sand seen in the lower left is just below the feed chutes. This is dirt coming in with the fuel and it settles in the bed.
The four bed hoppers and the sand shaker system were used to clean and recycle the combustor sand. The pile of wood chips there in front is from two decks above where a fuel chute was unplugged and the excess fuel fell through the grate floors.
Initial start up of steam system. All steam lines were open to atmosphere, most had spitters or traps as well as metal coupons to test for corrosion and to purge the steam pipes prior to sending steam to the turbine. This was a 3 day process and the town of Northfork had to be notified that we were going to do this, as it was quite NOISY.
When the Plant Manager and Head Engineer wants to sit in the combustor while I ramp up air flow, I don't have a problem with that. So they sat in there and we ran several air flow tests to check sand distribution and bed activity. Honestly, I can't imagine that they could see ANYTHING in there, have you ever been in a sand storm?
The fluidized bed had four hoppers that fed a shaker screen for cleaning. The good material is fed back into the combustor and the small stuff or oversized stuff would go through the elevator and be dumped into the loader bucket for waste removal.
Workers removed the glass view port to clean the area, the ports would have build up of sand and dirt blocking the view. If you did not keep it clean it, it will harden up and force you to get some kind of mechanical tool to clean it. You can see the hot embers flying out of the view port.
The combustor was kept at a slight Negative pressure but it would quite often go POSITIVE, which would blow embers, dust, sand, smoke and ash out of every orifice it could find. The entire combustor/furnace section had Explosion doors on every level, they were heavy doors that lifted when the furnace went POSITIVE, to allow the pressure to escape before exploding or damaging the combustor/furnace.