Sudden Uneven Burn

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JeepinPete
Member
Posts: 127
Joined: Fri. Mar. 04, 2011 6:29 pm
Stoker Coal Boiler: EFM
Coal Size/Type: Rice
Stove/Furnace Make: EFM
Stove/Furnace Model: Highboy
Location: Quakertown PA

Post Thu. Nov. 29, 2012 11:20 pm

All has been working well up until last night. When I went down to check on the EFM, I found that the fire was wrong. The back right side of the fire was not burning, and the front right was burning way too hot. The coal was also much more mounded than normal. The odd thing is the fire was normal Tuesday evening when I checked on it.

Tonight I check it out, and the fire is not burning on the back right side of the pot. There is a bunch of unburnt coal in the ash bin. So it appears I will be letting the fire got out this weekend and cleaning it out for an inspection. Any ideas on what would cause a sudden change like this?

Thanks,
Pete

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stoker-man
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Posts: 2063
Joined: Mon. Nov. 19, 2007 9:33 pm
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 Fri. Nov. 30, 2012 5:29 am

If the worm flights get sharp edges at the bottom of the pot, it can cause that. But that wouldn't happen overnight, unless something broke. In that case, the unburned spot moves around from day to day. Could be that there is alot of caked up fines under the plates at that spot. Make sure the cover plate is fully closed and not broken. Look up through the holes in the plate and see if everything is cleaned out.

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Rob R.
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Posts: 11498
Joined: Fri. Dec. 28, 2007 4:26 pm
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy
Location: Chazy, NY

Post Fri. Nov. 30, 2012 5:41 am

Any chance it swallowed a big chunk of damp fines? Let it go out and clean out the pot for a closer look.

JeepinPete
Member
Posts: 127
Joined: Fri. Mar. 04, 2011 6:29 pm
Stoker Coal Boiler: EFM
Coal Size/Type: Rice
Stove/Furnace Make: EFM
Stove/Furnace Model: Highboy
Location: Quakertown PA

Post Sat. Dec. 01, 2012 8:37 pm

Think I found the problem today...

Image

Found that wrapped around the auger shaft. It is a stainless steel band. I do believe it does not belong there :lol: The fire is now back to normal.

Best I could tell, that band was pulverizing the coal and had built up a damn of fines to the back side of the burner, preventing air flow. Everything else looks fine inside the pot.

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Mark (PA)
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Posts: 383
Joined: Thu. Feb. 28, 2008 9:40 am
Stove/Furnace Make: 1953 EFM SF-520 High Boy
Stove/Furnace Model: Fitzgibbon Boiler
Location: South Central, PA

Post Sat. Dec. 01, 2012 9:14 pm

woweee

good thing you got that baby out of there.

Good work!

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stoker-man
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Posts: 2063
Joined: Mon. Nov. 19, 2007 9:33 pm
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 Sat. Dec. 01, 2012 9:25 pm

wow :o

daluds
Member
Posts: 282
Joined: Fri. Jun. 20, 2008 9:27 am
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice
Stove/Furnace Make: EMF
Stove/Furnace Model: DF-520

Post Sun. Dec. 02, 2012 8:49 pm

Maybe that is causing my problem too! :-)

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