efm Bituminous boiler testing is next week

Re: efm Bituminous boiler testing is next week

PostBy: stoker-man On: Fri May 02, 2008 11:12 am

The burning experiment is supposed to occur this weekend. Changes are always possible. The experiment has to start from somewhere.
stoker-man
 
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove

Re: efm Bituminous boiler testing is next week

PostBy: europachris On: Fri May 02, 2008 12:14 pm

From what I've gathered, this stoker is being designed to handle the Western bituminous coals (Wyoming, etc.) and these coals tend to not clinker like the Eastern coals. The rotating burn pot is more to just eject the ash down into the pan below, and possibly to keep any clinker formation minimal.

I don't think that stoker would burn the local Illinois coal we have here very well. The high volatile content requires high firebox temperatures which will be hard to achieve with the stoker pot hanging in the middle of air, whereas a stoker set in the traditional refractory hearth will not have the excess air and furnace volume to deal with. I also think the Illinois coal would still clinker up into a big glob and maybe take the entire fire with it when it falls over the edge.

Of course, I am totally guessing at this point, so that EFM might burn our stuff really well. That would be a GOOD thing.
europachris
 
Stove/Furnace Make: EFM 350/Iron Fireman
Stove/Furnace Model: Custom bituminous burner

Re: efm Bituminous boiler testing is next week

PostBy: LsFarm On: Fri May 02, 2008 1:08 pm

When I tried to burn West Virginia Bitum coal in my Iron Fireman, which was set up like this EFM, that is suspended over an ashpan, without supporting refractory around the firepot,,, what happened is exactly what Chris described. The tall coke tree grew, and when it fell over, the bottom of the coke tree was the fire, and the fire went with the tree into the ash pan...

From the description of the Wyoming coal I've read, the EFM design should work, it may not be as efficient as burning anthracite,,, but at ~$50/ton... who cares??

With no clinker removal needed every 12 hours,, this boiler should be a winner... nobody likes to be tethered to their heating appliance... I'm really enjoying my AA boiler in this warm weather,, my hopper holds about 2 weeks worth of coal, and an ashpan is good for about 3-4 days... virtually maintenance free.

Greg L
LsFarm
 
Stoker Coal Boiler: Axeman Anderson 260
Hand Fed Coal Boiler: Self-built 'Big Bertha' SS Boiler
Baseburners & Antiques: Keystone 11, Art Garland


Re: efm Bituminous boiler testing is next week

PostBy: stoker-man On: Mon May 05, 2008 8:21 am

The test burn went very well, with no ash problems at all, and now the experiment will continue as the pot will be installed in a working boiler nearby.
stoker-man
 
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove

Re: efm Bituminous boiler testing is next week

PostBy: stoker-man On: Sun May 11, 2008 7:05 am

As stated above, the experimental stoker is being installed into a working 520 nearby. We are waiting for a 500# shipment of coal from Wyoming to arrive.
stoker-man
 
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove

Re: efm Bituminous boiler testing is next week

PostBy: Richard S. On: Sun May 11, 2008 8:47 am

That's proabably some damn expensive coal... :lol:
Richard S.
 
Stoker Coal Boiler: Van Wert VA1200
Coal Size/Type: Buckwheat/Anthracite

Re: efm Bituminous boiler testing is next week

PostBy: Klinker Mine On: Tue May 13, 2008 11:28 am

Looking forward to your testing. Doing a shop expansion this year and will need another stoker. Here is a shot of the stoker coal we get here in Wester Co.
Gary

Image
Klinker Mine
 
Stove/Furnace Make: Lenox

Re: efm Bituminous boiler testing is next week

PostBy: Scottscoaled On: Tue May 13, 2008 9:32 pm

Hey that coal is shiny! Thought Bit coal was dull?????? :) Scott
Scottscoaled
 
Stoker Coal Boiler: EFM 520x4, 700. Van Wert 1200.
Hot Air Coal Stoker Furnace: EFM 150, Keystoker 150
Coal Size/Type: Lots of buck

Re: efm Bituminous boiler testing is next week

PostBy: stoker-man On: Tue May 13, 2008 9:32 pm

Today I heard that a larger feed worm and tube was made due to there being 3 different sizes of coal that are lumped into one grade. There are some Prill parts being recycled too for the experiment.
stoker-man
 
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove

Re: efm Bituminous boiler testing is next week

PostBy: Klinker Mine On: Tue May 13, 2008 10:25 pm

Hey that coal is shiny! Thought Bit coal was dull?????? :) Scott

Scott,
Don't know about that. I have been burning this going on 5 years now. Haven't noticed any changes in the look. I will be interested in how the stove handles the Klinkers. I think that will be the biggest hurtle with selling to the general public.
Gary
Klinker Mine
 
Stove/Furnace Make: Lenox

Re: efm Bituminous boiler testing is next week

PostBy: stoker-man On: Wed May 14, 2008 5:42 am

I don't think the coal from Wyoming created clinkers. It burned nicely.
stoker-man
 
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove

Re: efm Bituminous boiler testing is next week

PostBy: Klinker Mine On: Wed May 14, 2008 5:37 pm

No klinkers..now that would be something.
Here are my mine from yesterdays run. Only ran part of the day, as it was warm.
Gary
Image
Klinker Mine
 
Stove/Furnace Make: Lenox

Re: efm Bituminous boiler testing is next week

PostBy: LsFarm On: Wed May 14, 2008 6:38 pm

Hi Klinker Mine,, where does your coal come from?? And, what type of coal burning appliance are you burning it in?? A hand feed? A stoker, and if so, what kind??

Those clinkers look very familiar :D :D , I used to see ones like that every day, or at least every day I tried to 'hook' them from the bottom of the firebox..where they were block the air flow through the grates..

Greg L
LsFarm
 
Stoker Coal Boiler: Axeman Anderson 260
Hand Fed Coal Boiler: Self-built 'Big Bertha' SS Boiler
Baseburners & Antiques: Keystone 11, Art Garland

Re: efm Bituminous boiler testing is next week

PostBy: Klinker Mine On: Wed May 14, 2008 7:25 pm

Greg,
It is a converted Lenox. Its a stoker that feeds from the bottom. They make great additions to the road. Here is a pile I have been saving since Jan 1. I am going to rough in a road down in the bottom of my property this summer. They really help in the winter, especially up here at 7000ft :shock:
Image
The coal comes from Oxbow and their longwall mine here in Western CO
Gary

http://www.oxbow.com/ContentPageSSL.asp?FN=ProductsCoal&TS=3&MS=19&oLang=
This link is broken, either the page no longer exists or there is some other issue like a typo.
Klinker Mine
 
Stove/Furnace Make: Lenox

Re: efm Bituminous boiler testing is next week

PostBy: LsFarm On: Wed May 14, 2008 8:06 pm

Bituminous burning stokers are rare out east.. especially ones in operation.. Can you post a photo of it?? Is it an underfeed firepot, with a refractory ledge around the perimeter of the firepot where the clinkers collect for your manual removal?? I have an old 'Iron Fireman' underfeed stoker meant for bituminous, but I used it for burning anthracite,, without the perimeter ledge, the ash [no hard clinkers] just falls off the edge and into the ashpan below.

A couple of photos would be great!!

Apparently the Wyoming coal has fairly high volitiles but also a fairly high ash fusion temp, so clinker formation is rare.. sounds like nice coal once the volitiles are burnt off. Does your converted Lennox have heated over-the-fire secondary air to burn of the volitiles from the freshly feeding coal??

I think this EFM would burn your clinker-prone coal, but you may not have all the clinkers fall freely into the ashpan, you may have to coax them around the stoker's mechanism. I think most would fall without issue.

Greg L
.
LsFarm
 
Stoker Coal Boiler: Axeman Anderson 260
Hand Fed Coal Boiler: Self-built 'Big Bertha' SS Boiler
Baseburners & Antiques: Keystone 11, Art Garland