Coal Falling Off Sides of the Grate

A Coal stoker furnace or stove controls most operations including automatically feeding the coal. They are quite similar to any conventional oil and gas units and easily operated for extended periods of time. They commonly use rice coal but may use larger sizes like buckwheat. They can be used as primary heat, supplementary heat or have a dual set up with your existing oil/gas furnace.
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Tom
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Joined: Mon. Apr. 17, 2006 11:08 am
Location: Rochester, New York

Post Tue. Jan. 15, 2008 4:09 pm

Hi all,
This my second season with a stoker. I'm running an Alaska Cast Console Hearth model. I've just started getting rice coal mounding up on the grate and a small amount falling of the sides. I'm using lightly oiled rice. I used untreated rice last year. The oiled rice is dry to the touch. Combustion fan shaft is properly lubed. I keep the low fire and high fire settings within 1 to 1.5 points of each other. Stove is running fine otherwise. Any experience with this?????????
Thanks and happy New Year. Tom

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Richard S.
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Joined: Fri. Oct. 01, 2004 8:35 pm
Stoker Coal Boiler: Van Wert VA1200
Coal Size/Type: Buckwheat/Anthracite
Location: NEPA

Post Tue. Jan. 15, 2008 5:19 pm

From delivering I can tell you wet coal will stick to the chute, you need slightly more pitch than if it were completey dry particularly with rice. Same may true with the oiled coal, simply not enough pitch, even if its just a little film on it.
"The difference between stupidity and genius is that genius has its limits."

- Albert Einstein

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WNY
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Posts: 5849
Joined: Mon. Nov. 14, 2005 8:40 am
Hot Air Coal Stoker Stove: Keystoker 90K, Leisure Line Hyfire I
Coal Size/Type: Rice
Stove/Furnace Make: Keystoker, LL & CoalTrol
Stove/Furnace Model: 90K, Hyfire I, VF3000 Soon
Location: Cuba, NY
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Post Tue. Jan. 15, 2008 6:21 pm

You might have something stuck to the grate, clinker or fused coal to the grate. it stops the ashes/coal from pushing smoothly/evenly off the end and it backs up and some falls over the sides of the grate. You may have to shut it down and scrap the grate good and sand it smooth. I had it happen with a big clinker, it stopped the movement and everything decided to go over the sides of the grate....
- Dave
Hyfire I & Keystoker 90K heating an 1890 Victorian
- Amsoil Authorized T1 Certified Dealer


User avatar
Richard S.
Mayor
Posts: 12712
Joined: Fri. Oct. 01, 2004 8:35 pm
Stoker Coal Boiler: Van Wert VA1200
Coal Size/Type: Buckwheat/Anthracite
Location: NEPA

Post Tue. Jan. 15, 2008 6:26 pm

Ahhh, WNY is correct, any obstruction no matter how small will stop/slow it too. One frozen piece of rice on the chute could stop whole operation if it's barely going to begin with.
"The difference between stupidity and genius is that genius has its limits."

- Albert Einstein

Tom
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Posts: 9
Joined: Mon. Apr. 17, 2006 11:08 am
Location: Rochester, New York

Post Sat. Jan. 19, 2008 12:22 am

Thanks Richard and WNY. There was a 1/2" X 1/2" obstruction on the grate. Needed a hammer to get it off. Working fine.
Tom

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