Keystoker A 150

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ltmdl90
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Post by ltmdl90 » Fri. Oct. 16, 2015 11:52 pm

How can I improve the burn of this furnace. to much unburnt coal for my taste.

Feed rate is not over feeding. I put the 2nd blower on it for when it is in idle mode. What about the main blower? Weak?

i am burning buckwheat.

 
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blrman07
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Post by blrman07 » Sat. Oct. 17, 2015 6:28 am

It is not going to burn to powder if that is what you are expecting. Your ash will always look a bit like granola. Can you post a picture of the ash?

 
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Rob R.
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Post by Rob R. » Sat. Oct. 17, 2015 7:56 am

A fair amount of unburned coal is normal when the stoker is just idling all the time. It should clear up when the furnace starts getting some heat calls. Another possibility is that your coal supply contains more "bone" than average, or the coal is just really hard.

 
ltmdl90
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Post by ltmdl90 » Sat. Oct. 17, 2015 8:14 am

yes I will post today


 
ltmdl90
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Post by ltmdl90 » Sat. Oct. 17, 2015 9:26 am

Pic

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20151017_091733.jpg
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McGiever
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Post by McGiever » Sat. Oct. 17, 2015 6:35 pm

ltmdl90 wrote:How can I improve the burn of this furnace. to much unburnt coal for my taste.

Feed rate is not over feeding. I put the 2nd blower on it for when it is in idle mode. What about the main blower? Weak?

i am burning buckwheat.
Fines accumulated under the grate will affect the air/burn pattern...pull the small blower off and w/ added smaller tube on shop vac, you can reach tube in and clean the fines all out. :idea:

Baro setting needs to be little higher to for buck size...near .05 in/H2O if you can get it???

 
ltmdl90
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Post by ltmdl90 » Sun. Oct. 18, 2015 7:55 am

Nothing under grates it was cleaned before I fired it up.

 
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StokerDon
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Post by StokerDon » Sun. Oct. 18, 2015 9:03 am

ltmdl90 wrote:Pic
That ash looks a lot like the ash I got when running Medium Buckwheat in my Yellow Flame. I couldn't reduce the air enough to get it to burn right.

On your Keystoker, I would try turning the air down and adjusting the feed rate accordingly. Or switch to Hard Rice coal. Is your Keystoker one that is set up for Buckwheat coal?

That ash pan looks mighty heavy!

Here's what mine looked like.
BuckAsh 003.JPG
.JPG | 216.8KB | BuckAsh 003.JPG
-Don


 
ltmdl90
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Post by ltmdl90 » Sun. Oct. 18, 2015 2:23 pm

Would you think that trying to get more air rather than less?

I am going to try rice and see what happens.

 
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StokerDon
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Stoker Coal Boiler: Gentleman Janitor GJ-5, Van Wert VA-600, Axeman Anderson130 X3.
Hand Fed Coal Furnace: Harman SF3500 reduced down to 3 grates connected to its own plenum
Coal Size/Type: Rice, Chestnut and whatever will fit through the door on the Harman
Other Heating: Noth'in but COAL! Well, Maybe a little tiny bit of wood

Post by StokerDon » Sun. Oct. 18, 2015 4:32 pm

ltmdl90 wrote:Would you think that trying to get more air rather than less?

I am going to try rice and see what happens.
To me that photo you have there looks like the rocks that are in there are burnt and fractured and not turned into ash. On my unit this was the result of the coal being fired at to high of a temperature. Reducing the air helped.

Try it both ways, what have you got to loose? Just keep track of your settings so you know what worked and what didn't.

-Don

 
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Rob R.
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Post by Rob R. » Sun. Oct. 18, 2015 4:35 pm

Either it is the coal, or something is out of adjustment.

 
ltmdl90
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Post by ltmdl90 » Sun. Oct. 18, 2015 6:09 pm

I will adjust the air back and try it.

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