unburnt coal

unburnt coal

PostBy: nuthcuntrynut On: Sun Sep 22, 2013 5:21 pm

threw myfirst bunch of coal Ashes out in the driveway, no problem, good way to fill in the potholes. after the rain has washed it for a few days now I'm seeing what looks to be allot of unburnt coal? It falls off the end of the stoker with no visible flame on it. Any takers on this subject?
i actually collected some of this stuff up and tried burning it with a torch, it glows red. maybe 10second it's dead again. So I'm guessing it's just the nature of the beast. i remember on our old hand feed nut coal stove, the Ashes were just that Ashes, no black left. that was over thirty yrs ago too.
:wtf:
nuthcuntrynut
 
Stoker Coal Boiler: wl110 leisure line
Coal Size/Type: rice
Other Heating: ussc pellet stove
Stove/Furnace Make: Leisure Line
Stove/Furnace Model: WL 110

Re: unburnt coal

PostBy: nuthcuntrynut On: Sun Sep 22, 2013 5:23 pm

here's a quick pix
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nuthcuntrynut
 
Stoker Coal Boiler: wl110 leisure line
Coal Size/Type: rice
Other Heating: ussc pellet stove
Stove/Furnace Make: Leisure Line
Stove/Furnace Model: WL 110

Re: unburnt coal

PostBy: tsb On: Sun Sep 22, 2013 5:41 pm

Pretty much the nature of the beast. A flat bed burner, even with the best coal,
will give unburned pieces. The rain just washes the ash away from them and
makes them more visible. I've tried to run them through again, but it's more work
than results.
tsb
 
Stoker Coal Boiler: Binford 2000
Hot Air Coal Stoker Stove: LL Pioneer top vent
Hand Fed Coal Stove: Saey Hanover II


Re: unburnt coal

PostBy: nuthcuntrynut On: Sun Sep 22, 2013 7:09 pm

it is going to make for nice drive way fill.
nuthcuntrynut
 
Stoker Coal Boiler: wl110 leisure line
Coal Size/Type: rice
Other Heating: ussc pellet stove
Stove/Furnace Make: Leisure Line
Stove/Furnace Model: WL 110

Re: unburnt coal

PostBy: Wiz On: Sun Sep 22, 2013 7:43 pm

Unburnt coal will become less once colder temps arrive.
Wiz
 
Stoker Coal Boiler: Keystoker Ka 6
Coal Size/Type: Casey Junk Coal :(

Re: unburnt coal

PostBy: lsayre On: Sun Sep 22, 2013 7:47 pm

Wiz wrote:Unburnt coal will become less once colder temps arrive.


That has been my experience as well.
lsayre
 
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Anthracite Pea
Other Heating: Resistance Boiler (if I ever get it fixed)

Re: unburnt coal

PostBy: 2001Sierra On: Sun Sep 22, 2013 7:57 pm

Hand fired more powdery ash, white ash for sure. Red ash not so much. Stokers give us Granola. Keep an eye on it as time and temps change, and ask more questions. Picture does look like a fair amount of unburned good stuff. Check out the links about stoker ashes.
Ash by volume, not by weight
2001Sierra
 
Hot Air Coal Stoker Stove: Keystoker 90 Chimney vent
Coal Size/Type: Rice
Other Heating: Buderus Oil Boiler 3115-34
Stove/Furnace Model: Keystoker 90 Chimney Vent

Re: unburnt coal

PostBy: nuthcuntrynut On: Sun Sep 22, 2013 8:04 pm

lsayre wrote:
Wiz wrote:Unburnt coal will become less once colder temps arrive.


That has been my experience as well.




huh glad i asked, wonder why maybe less cycling on idle timer makes for less sitting idle?
just received my coal order, dealer claims his coal burns 8 to 10% ash, and better than the bagged blashak i bought to play with, that runs 15%ash. i noticed his coal is dark black and heavier than the bagged stuff. maybe because it's not washed?
nuthcuntrynut
 
Stoker Coal Boiler: wl110 leisure line
Coal Size/Type: rice
Other Heating: ussc pellet stove
Stove/Furnace Make: Leisure Line
Stove/Furnace Model: WL 110

Re: unburnt coal

PostBy: tsb On: Sun Sep 22, 2013 8:18 pm

Blashak ! Now you tell me. Never so happy as when I ran out of Blashak.
tsb
 
Stoker Coal Boiler: Binford 2000
Hot Air Coal Stoker Stove: LL Pioneer top vent
Hand Fed Coal Stove: Saey Hanover II

Re: unburnt coal

PostBy: nuthcuntrynut On: Sun Sep 22, 2013 8:24 pm

tsb wrote:Blashak ! Now you tell me. Never so happy as when I ran out of Blashak.

sooooooo it is *censored* coal then! I've only got maybe 200lbs left, looking forward to trying my coal stash now! i think dealer says he got his coal from Reading area? Hulbert supply house up here sells Kimmel, what's the scoop on that coal?
:doh:
nuthcuntrynut
 
Stoker Coal Boiler: wl110 leisure line
Coal Size/Type: rice
Other Heating: ussc pellet stove
Stove/Furnace Make: Leisure Line
Stove/Furnace Model: WL 110

Re: unburnt coal

PostBy: tsb On: Sun Sep 22, 2013 8:30 pm

I think kimmels is mostly southern range coal. It will burn with lots of flame and heat.
The unburned coal will be a lot less than Blashak.
tsb
 
Stoker Coal Boiler: Binford 2000
Hot Air Coal Stoker Stove: LL Pioneer top vent
Hand Fed Coal Stove: Saey Hanover II

Re: unburnt coal

PostBy: nuthcuntrynut On: Sun Sep 22, 2013 8:44 pm

wife is heading to western. pa, next month for a visit
( Washington area), thinking I'll send her down with some coal cash to purchase other brands, know of a reading dealer down there, this coal thing is going to be fun.
nuthcuntrynut
 
Stoker Coal Boiler: wl110 leisure line
Coal Size/Type: rice
Other Heating: ussc pellet stove
Stove/Furnace Make: Leisure Line
Stove/Furnace Model: WL 110

Re: unburnt coal

PostBy: Rob R. On: Sun Sep 22, 2013 9:30 pm

Just remember, ash content is determined under laboratory conditions. An idling stoker is not the lab, and it is possible to have high quality coal that doesn't behave well in a stoker that isn't being worked. I have had ultra hard coal that burned fantastic in the heating season, but when the boiler was just loafing along I got a lot of partially burned coal in the ashes and the fire tried to out if the timer wasn't set just right.

tsb wrote:I think kimmels is mostly southern range coal. It will burn with lots of flame and heat.


Yes, and that has been my experience as well. Coal from the Western side of the Southern Field seems to have a little higher volatile content...starts easy, burns hot & thoroughly. My EFM has held a fire for 12 hours without Kimmel's rice when I forgot to turn the power back on after an adjustment. :oops:
Rob R.
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice/buck
Other Heating: Dad's 1953 EFM Highboy

Re: unburnt coal

PostBy: mcrchap On: Wed Nov 06, 2013 3:48 pm

You could try decreasing your coal feed so less gets put on the grate at a time, or slightly increasing the draft to make it burn a bit hotter. Feed and draft need to be adjusted from time to time to suit the coal you are burning...softer or harder. The nature of the coal changes with the vein it came out of and that cannot be determined by appearance.
mcrchap
 
Hot Air Coal Stoker Furnace: Keystoker A 90
Coal Size/Type: rice
Other Heating: New Yorker Oil boiler
Stove/Furnace Make: keystoker
Stove/Furnace Model: Econo

Re: unburnt coal

PostBy: Pacowy On: Wed Nov 06, 2013 3:57 pm

AFAIK it is normal for there to be a small amount of unburned coal from any stoker (and probably hand-fired, too). As each piece of coal burns the outer portion turns to ash and may insulate some of the inner portion, preventing complete combustion. Heroic efforts should not be undertaken to deviate from specs on draft or feed/air relationships, since they pretty much invariably will reduce the overall efficiency achieved, even if they burn the coal a little more thoroughly.

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