stack temp

ryan20strohl · By: **ryan20strohl** On: Tue Nov 27, 2012 8:31 pm

hello everyone, i noticed today that my stack temp was at 450 deg, the efm 520 is running at 4 teeth and 5 to 5 1/2 air. i am burning lehigh coal is this normal to have a high temp, stoker was running for more then 30 min.

stoker-man · By: **stoker-man** On: Tue Nov 27, 2012 8:54 pm

Why is your air so high? 4 on the air should be enough. If your water jacket isn't extracting the heat from the fire, your stack will be higher. Also, is the baffle in place? Is the draft regulator set right?

Rob R. · By: **Rob R.** On: Tue Nov 27, 2012 9:20 pm

With that much air and a long burn, 450F is possible...especially if the boiler is due for a cleaning.

My last batch of rice had a lot of small pieces, and required about 4.75 on the air to get a proper ash ring with 4 teeth of feed. On a long burn I could see 425F on the stack.

Have you checked the stoker for air leaks? Is the coal on the small side or unusually slow burning?

ryan20strohl · By: **ryan20strohl** On: Tue Nov 27, 2012 9:37 pm

stoker was cleaned in september, i am burning rice it look like normal size, rice looks great, all the rice is the same size no big or too little chunks, with 4.5 air i get unburt coal with 5.5 i get really great results. rice does seem like it packs more to answer ur question rob. what should a normal stack temp be and will this be harmfull in the long run. i think normal is around 350 right. YES the baffle is in place, also temp was measured before baro, baro set to 2

Rob R. · By: **Rob R.** On: Tue Nov 27, 2012 9:46 pm

You should adjust the air to keep a 1.5-2" ash ring around the fire during a long burn (30+ minutes). Do not try and eliminate all black from the ash.

ryan20strohl · By: **ryan20strohl** On: Tue Nov 27, 2012 10:08 pm

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ryan20strohl · By: **ryan20strohl** On: Tue Nov 27, 2012 10:13 pm

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baffle

Rob R. · By: **Rob R.** On: Tue Nov 27, 2012 10:17 pm

Boy, there doesn't seem to be much carbon left in those ashes! Any chance you can get a picture of the fire after the next long burn?

ryan20strohl · By: **ryan20strohl** On: Tue Nov 27, 2012 10:24 pm

sure

should i lower my setting of air or just let it be

Rob R. · By: **Rob R.** On: Tue Nov 27, 2012 10:28 pm

Set it a little under 5 and let it rip.

ryan20strohl · By: **ryan20strohl** On: Tue Nov 27, 2012 10:31 pm

ok will do now i will post pics tomarrow of ash and fire in pot

cardinal · By: **cardinal** On: Wed Nov 28, 2012 12:21 am

Where did you get lehigh coal, I 'm told they only sell in bulk and won't sell to local haulers with small trucks

ryan20strohl · By: **ryan20strohl** On: Wed Nov 28, 2012 4:56 pm

they started too get rid of it because they have soo much
they were shipping it to china but then something happened

Rob R. · By: **Rob R.** On: Wed Nov 28, 2012 5:02 pm

cardinal wrote:Where did you get lehigh coal, I 'm told they only sell in bulk and won't sell to local haulers with small trucks

According to the thread they started a while back, they take orders of 20 tons or larger.

LEHIGH ANTHRACITE

cardinal · By: **cardinal** On: Wed Nov 28, 2012 11:51 pm

Thanks Rob and Ryan for the info. I live on top of the mountain so close to lehigh anthracite I can hear the equipment operating from my backyard. And I didn't know I could purchase their coal , they always had the best coal .I have enough coal for the winter, this summer I will order 20 ton if that what it takes.Coal bin holds 8 ton I guess a large tarp will do.

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