Fly ash and/or residue insulating firebox?

Re: Fly ash and/or residue insulating firebox?

PostBy: Lightning On: Thu Dec 22, 2011 4:03 am

nortcan wrote:
franco b wrote:When you shake down anything you can do to minimize draft through the coal bed will help. If you keep everything closed then close off the air intake also. You can also open the upper door to temporarily divert draft from going through the coal bed. Should lessen fly ash.


100% right. It helps a lot to do so.


Oh yeah, ok - I have to open the ash pan door to access the grates to shake them. I was leaving the top door closed while I would shake. These conditions surely sent a big qyantity of air thru the coal bed to carry fly ash. I'll shake with both doors open and see how that helps.

Thanks for the great advise, you guys rock :D
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut Size / White Ash

Re: Fly ash and/or residue insulating firebox?

PostBy: pastor55 On: Wed Jan 04, 2012 12:48 pm

I also leave the handle pulled out on the draft ,so that you dont get any fumes in the house.
pastor55
 
Stove/Furnace Make: clayton 1600m
Stove/Furnace Model: us stove

Re: Fly ash and/or residue insulating firebox?

PostBy: Op4_camper On: Wed Jan 04, 2012 7:51 pm

Different take same principle. Why don't they heat sink the inside of a coal stove or furnace?
Im a machinist , fabricator and welder. Been one since good lord 1981. I know I could build a more efficient stove. Would It cost more? Guaranted. I will say it be a heat proceeding efficient stove. Would it be worth the cost? If it was bult to last and KISS then I think so, no I know so.
Op4_camper
 
Stove/Furnace Make: hot blast burning hard nut.
Stove/Furnace Model: us stove

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Re: Fly ash and/or residue insulating firebox?

PostBy: Lightning On: Wed Jan 04, 2012 8:22 pm

I was thinking, how about running a hand full of 2 inch diameter tubes thru the top of it that convection air would pass thru?
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut Size / White Ash

Re: Fly ash and/or residue insulating firebox?

PostBy: franco b On: Wed Jan 04, 2012 10:20 pm

Improving heat exchange is much less of a problem with coal than designing for instance, simpler more effective grates or a simple stoker with one motor that only runs intermittently to clear ash.
franco b
 
Hand Fed Coal Stove: V ermont Castings 2310, Franco Belge 262
Baseburners & Antiques: Glenwood Modern Oak 114
Coal Size/Type: nut and pea

Re: Fly ash and/or residue insulating firebox?

PostBy: Dennis On: Sat Jan 14, 2012 10:20 pm

Well after this evening's reloading and having the dust brush in hand. I decieded to clean the fly ash build up off the fire box walls and water baffels.When the combustion blower turned on I didn't pay much attention,but when the blower did shut off I noticed it didn't take as long for boiler temps. to recover and stack temps. were not as hot as before.I believe I will have to do this every other week since it only took 10 minutes to do. Dennis
Dennis
 
Hand Fed Coal Boiler: AHS/WOC55-multi-fuel/wood,oil,coal
Coal Size/Type: Anthracite/stove size

Re: Fly ash and/or residue insulating firebox?

PostBy: Lightning On: Mon Nov 11, 2013 8:25 am

At this point I'm three weeks into burning so far this season. Yesterday after loading (so I could work in a cooler fire box) I pulled the baffle plates and set them on top the fresh coal bed. Then I proceeded to scour the inside of the furnace with a wire brush and a paint scraper.

Later in the day, I noticed the house getting too warm. Everything was the same as the day before. Same primary and secondary air feeds, same draft, same temps on the furnace and flue pipe. Even the outside temp of 48 degrees was the same. The only thing changed was a cleaner surface in the fire box.

Keeping it clean definitely improves heat transfer from inside the furnace to air inside the jacket 8-)
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut Size / White Ash

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