Don't Burn Wet Coal

Stoker Coal Boilers automatically feed the coal and have controls and pumps just like any conventions boiler. They are intended to be used as a primary heat and often have domestic hot water coils as an added bonus. They can be set up independently or in dual sytem with your existing oil/gas boiler. They can accommodate both hot water base board or steam plumbing.
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Joined: Wed. Jan. 16, 2008 7:59 am
Stoker Coal Boiler: EFM 520
Coal Size/Type: Rice
Stove/Furnace Make: EFM 520, 1980
Stove/Furnace Model: 520
Location: Pa.

Post Mon. Dec. 21, 2009 8:07 pm

e.alleg wrote:I learned a lesson the hard way. My coal is really dry so I have been watering it down when filling the hopper to reduce the dust. Today I smelled sulfur so I went down to check it out and while there was 200 pounds of coal in the hopper I could see the auger in the bottom of the barrel. The coal stuck to the sides and made a huge funnel. So I just pushed it down, added another couple hundred pounds and went away. Fast forward and we're freezing a few hours later. The wet coal made a pocket around the auger in the bottom of the bin so it wouldn't feed and the fire went out. I had to shovel all the coal out of the hopper because I thought the auger had broken, come to find out it wasn't broke just packed with wet coal. I never had a problem using dry to slightly damp coal but too wet is definitely bad.

BTW I got to thinking about things like holiday breakdowns (because things only break at the worst possible time) if the auger ever breaks can it just be pulled out and welded and put back into service?
I don't feel so stupid now that I'm not alone. I did the same thing for a different reason
For there is one God, and one mediator between God and men, the man Christ Jesus 1 Tim 2:5

Thou believest that there is one God; thou doest well: the devils also believe, and tremble.Ja.2:19

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Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove
Location: Lehigh Valley, PA

Post Mon. Dec. 21, 2009 8:14 pm

Yes, I have seen worms break before the sheer pin, usually at the weld.

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