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Tool Talk Discussion Forum

coal fired stoker boilers

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Oliver Power

02-18-2006 12:46:40




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Looking at Keystoker and Harman VF-3000. Anyone have any experience with either of these hot water boilers. PRO"s / Con"s. Also open to suggestions on hand fired coal boilers , but prefer stoker(automatic) feed.




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Mark - IN.

02-19-2006 04:15:17




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 Re: coal fired stoker boilers in reply to Oliver Power, 02-18-2006 12:46:40  
I'm a phone guy that spends an awful lot of time in fossil (mostly coal) fired power plants, and that's some dirty, dirty stuff.

The stuff they use is a mixture of hybrids, and they treat it with all kinds of stuff to keep the pollutions down, and even though the smoke comes out the stacks white (high in moisture), at best its still full of acids that do the number on vehicles parked in the lot and everywhere around it, and I can imagine thin guage metal house and shed siding. The EPA's constantly all over them guys, and they have the ability to treat it in ways that the average Joe can't or can't afford. Coal's very corrosive, and the dust... I've seen the entire sides of plants, conveyors and crusher houses blown completely off like that federal building in Oklahoma City. And the upkeep to the boilers and burners from the corrosion is a never ending battle.

With heating costs being what they are, I can see coal trying to make a comeback, but I can also see the EPA squashing that real quick. I don't think that your neighbors are gonna like you much if you turn their homes black and rust their cars out. Besides, you'll need a supplier.

Mark

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Rollie NE,PA

02-18-2006 14:43:01




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 Re: coal fired stoker boilers in reply to Oliver Power, 02-18-2006 12:46:40  
Last year I purchased a used EFM coal boiler/stoker. I installed it in my detached garage and piped it to my oil furnace in the house. The oil burner motor is disconnected but the circulator pumps are not.The circulator on the stoker provides the hot water to the oil furnace. The stoker also heats my domestic hot water and the residual heat from the stoker heats my garage. The problem with burning coal is the dust from the ashes. The dust seems to get every where in the house Thats one reason I put mine in the garage. The other probem is you will need a coal bin. I store 8 ton. Water from the coal will leak from the bin. For me coal is the answer.
Good Luck, Rollie

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Joe in MN

02-18-2006 13:05:23




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 Re: coal fired stoker boilers in reply to Oliver Power, 02-18-2006 12:46:40  
If your looking for answeres, you have to have Questions... I'm an old Licensed Boiler Man, and would only go with the "hopper" automatic feed, and make sure any Boiler you get, has dependable Safety devices attached that can be tested from time to time. You must be in an area that has plenty of Coal, that's a Big Plus, I hope you don't smoke out your neighbors, that may be a concern my friend.

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Kevin in Wi

03-03-2006 11:59:05




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 Re: coal fired stoker boilers in reply to Joe in MN, 02-18-2006 13:05:23  
Not knowing anything about coal stokers, my question is. How does the stoker know when to turn off? I assume (maybe wrongly) that an aqua-stat turns on the stoker when the water temp gets low enough. But the introduction of fresh coal doesn't raise the water temp right away, so what limits the stoker from feeding too much coal in? thanks



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Joe in MN

03-03-2006 14:36:57




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 Re: coal fired stoker boilers in reply to Kevin in Wi, 03-03-2006 11:59:05  
Your right about the stocker operation, it turns on when the Fire is needed -- that being when the water temp drops. and turns off when the water temp is satisfied. the amount of coal needed, is determined by the size of the fire box, and the kind of coal being burned. thus, that's the Engineering part of the job -- all the Engineer has to do is watch the fire and set the auger on the hopper to what ever speed he wants. some guys know what their doing some don't --- and makes for a poor Engineer. once you get it set, it pretty much stays the course, but one must keep an eye on it... hope that helps, Joe

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