unburnt coal in ash bin

unburnt coal in ash bin

PostBy: kbrindle On: Tue Dec 03, 2013 9:55 am

I am new to burning coal so I was unsure of this at first. I have a Reading Juniata Stove. It also has the coal trol attached to it. I always thought that there was unburnt coal in my ash bin. Some of it was burning, but there was unburnt coal sneaking by and into my ash bucket. While taking my ashes out yesterday my neighbor came over to have a look. He confirmed to me that yes it looked as if I was wasting coal, and the coal was being push forward before it was fully burnt. My fire is at least 2" away from the end of the grate, so it's not falling off while it is still on fire, but rather being pushed forward to where the air is not blowing up from underneath to keep the fire at that point on the grate. But like I said I am very new to this burning coal thing. I had to see unburnt coal in ash bin.
kbrindle
 

Re: unburnt coal in ash bin

PostBy: Pacowy On: Tue Dec 03, 2013 10:20 am

Some amount of unburned coal goes into the ash bin even with an efficient fire. If there is a 2" band of ash after the unit has run hard for 30+ minutes, I wouldn't worry about it too much. If you think it might be excessive, it would be helpful if you could post pics so we can see it, too.

Mike
Pacowy
 
Stoker Coal Boiler: H.B. Smith 350 Mills boiler/EFM 85R stoker
Coal Size/Type: Buckwheat/anthracite

Re: unburnt coal in ash bin

PostBy: Freddy On: Tue Dec 03, 2013 12:02 pm

I'm pretty sure the Juaniata has the "triburner" mechanism. What is happening is very normal for it. It can be improved. The "problem" with the triburner is that the combustion fan only blows while the burner is stoking....that is... if you stop the bed the blower would stop. On these the bed usually doesn't stop, but, as you slow the stoking down (so you don't roast yourself out) the fan slows down with it. Less fan equals less air, less air equals a burn that isn't complete. You'll find on very cold days when you ask the stove to run flat out that you get much less unburned coal because the fan is running full speed.

The cure is to remove the squirrel cage blower from the tri-burner and add a fan that runs full speed 24 hours a day. Here's a good fan: http://www.grainger.com/product/DAYTON- ... vc=IDPRRZ1

Attached is a picture of how one was added.

Also.... if you do a search on the forum for "reading upgrade" I think you'll find some posts showing this idea. Maybe someone has the posts saved and will post links to them?
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Freddy
 
Stoker Coal Boiler: Axeman Anderson 130 (pea)
Hot Air Coal Stoker Stove: Reading piece o' junk in the barn (rice)
Coal Size/Type: Pea size, Superior, deep mined

Re: unburnt coal in ash bin

PostBy: Pacowy On: Tue Dec 03, 2013 12:32 pm

I understand many people have done that but to me it doesn't seem productive. It adds equipment cost, electricity use and noise to incinerate a very small amount of coal at a time when the unit does not have a load to carry. As Freddy points out, the "problem" doesn't happen when the unit is working hard, and I would add that is when most of the coal gets used. I prefer the guidance regarding unburned coal at idle provided in some of the old-school manuals. To paraphrase: "Get over it." :D

Mike
Pacowy
 
Stoker Coal Boiler: H.B. Smith 350 Mills boiler/EFM 85R stoker
Coal Size/Type: Buckwheat/anthracite

Re: unburnt coal in ash bin

PostBy: kbrindle On: Tue Dec 03, 2013 12:48 pm

Image
kbrindle
 

Re: unburnt coal in ash bin

PostBy: kbrindle On: Tue Dec 03, 2013 12:50 pm

The picture about is my coal ash. I don't believe mine has the tri burner. And I do have a seperate combustion fan hooked up. It's hooked up to my coal trol box I also have a fan to blow the hot air.
kbrindle
 

Re: unburnt coal in ash bin

PostBy: kbrindle On: Tue Dec 03, 2013 12:59 pm

That's the picture of my ash I don't believe I have the tri burner model and I already have a seperate blower just for combustion with the coal trol conversion
kbrindle
 

Re: unburnt coal in ash bin

PostBy: Pacowy On: Tue Dec 03, 2013 1:25 pm

That does looks like quite a bit of unburned coal, especially if you already have a separate combustion fan and are running with a Coal-Trol. I'll take back my earlier suggestion, and leave it to people experienced with this set-up to help you out.

Mike
Pacowy
 
Stoker Coal Boiler: H.B. Smith 350 Mills boiler/EFM 85R stoker
Coal Size/Type: Buckwheat/anthracite

Re: unburnt coal in ash bin

PostBy: Wiz On: Tue Dec 03, 2013 1:45 pm

Could be crappy coal, where is coal from and does it have allot of smaller pieces.
Wiz
 
Stoker Coal Boiler: Keystoker Ka 6
Coal Size/Type: Casey Junk Coal :(

Re: unburnt coal in ash bin

PostBy: kbrindle On: Tue Dec 03, 2013 2:04 pm

It was from harmony in my Carmel which was supposedly very good. This stuff is from reading coal. Both stuff burned much the same
kbrindle
 

Re: unburnt coal in ash bin

PostBy: kbrindle On: Tue Dec 03, 2013 2:09 pm

..
kbrindle
 

Re: unburnt coal in ash bin

PostBy: Wiz On: Tue Dec 03, 2013 3:40 pm

Have you done a complete cleaning? What have you done on cleaning?
Wiz
 
Stoker Coal Boiler: Keystoker Ka 6
Coal Size/Type: Casey Junk Coal :(

Re: unburnt coal in ash bin

PostBy: kbrindle On: Tue Dec 03, 2013 6:08 pm

I recently vaccummed out the entire thing Cleaned grate and air holes in it as well as under it. Also replaced gaskets around grate/ fire box. Cleaned up fire brick as well
kbrindle
 

Re: unburnt coal in ash bin

PostBy: kbrindle On: Tue Dec 03, 2013 6:09 pm

Thanks for all the input so far. I was wondering if there was some setting in coal trol I should be adjusting
kbrindle
 

Re: unburnt coal in ash bin

PostBy: Wiz On: Tue Dec 03, 2013 7:57 pm

check this thread....Reading Juniata help!!
Wiz
 
Stoker Coal Boiler: Keystoker Ka 6
Coal Size/Type: Casey Junk Coal :(