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Author Topic: Burning as we go  (Read 878 times)

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Offline Brad_bb

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Burning as we go
« on: April 16, 2017, 09:59:15 pm »
Just burning Ash and Walnut bark, and some yard trimmings.  Since we are cutting timbers, both live edge and sawn, we can keep up burning our waste.  The slabs that are thick enough are turned into firewood for my off bearers wood stove.  The bark, sawdust and edgings from the few boards made outside of the timber, get burned in the vortex burn barrels.  When you dump the wet sawdust in on top of a bed of coals, it dampens down the fire and takes awhile to heat the dust to drive the moisture out and start burning.
 

 
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Online trapper

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Re: Burning as we go
« Reply #1 on: April 16, 2017, 11:27:28 pm »
how do you make them?
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Offline Don_Papenburg

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Re: Burning as we go
« Reply #2 on: April 16, 2017, 11:37:14 pm »
Brad has a post on building them someplace here.  I made one fast and sloppy with an axe . Several diagonal cuts around the barrel in two rows . My barrel is only 30 gallon so two rows worked well.
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Offline thecfarm

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Re: Burning as we go
« Reply #3 on: April 17, 2017, 06:37:07 am »
Looks like you have some heat there.
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Offline petefrom bearswamp

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Re: Burning as we go
« Reply #4 on: April 17, 2017, 07:01:53 am »
Brad how do these work with green slabs?
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Offline brianJ

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Re: Burning as we go
« Reply #5 on: April 17, 2017, 07:19:34 am »
Do these hold enough coals overnight tostart again in the morning?    Or do you need to light them up each day?

Offline Brad_bb

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Re: Burning as we go
« Reply #6 on: April 17, 2017, 07:43:34 am »
I made them from a youtube video:



They will hold coals overnight if there's a good amount in the bottom plus some saw dust to slow the burn.  This barrel design helps oxygen get in better so it will burn everything better.  If you put any saw dust in, put it over hot coals against one side of the barrel and don't put too much that it smothers all the coals.  Also, I'm assuming you guys know the dangers of dumping saw dust on a fire?  Dry dust will act like pouring gasoline on a fire and climb up to where you're pouring from.  Damp dust is a lot easier to work with and keep your face away from the fire.  I have singed my my arm hair a few times, and my head hair once.

They will burn green wood, but I don't put any thick pieces in there only because my off bearer takes the thicker slab material for his wood stove, so only the thinner stuff is left to burn. But yes it will burn green slab wood fine. Green Bark will burn easily, and the heat of the fire will quickly dry the slab pieces and burn them.  Sugars in the wood also help them burn.

Again, if you're production sawing boards on a hydraulic mill, two barrels probably can't keep up with your saw dust.  But doing timbers plus a few boards and stickers from a log like I do, It can keep up.  The other good thing about these barrels is that they are closer to my mill than what we used to do(haul the dust to the back pasture for a burn pile once a year).  The barrels also burn much cleaner than an open burn pile because as the material gassifies, the added oxygen burns it like an after burner.  So once you get them going you don't have much smoke to speak of (until you dump some wet dust and smother the coals).  Open fires just create so much smoke, and are less safe.  With the burn barrels I have them on the gravel so less chance of catching anything else on fire.  Keep away from the grass to you don't get a grass fire!  I also elevate the barrels on 3 bricks to make sure they get enough air from underneath.
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Offline bandmiller2

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Re: Burning as we go
« Reply #7 on: April 17, 2017, 08:02:20 am »
Somehow it seems a shame to waste that many BTU's that could be drying lumber or heating something. Frank C.
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Offline Brad_bb

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Re: Burning as we go
« Reply #8 on: April 17, 2017, 08:33:08 am »
I agree, If there were an efficient and economical way to capture it.... The problem is you are dealing with irregular material so it's not a consistent heat level and you cannot automate feeding the fire as you can a pellet stove.  Making pellets from your scraps for one person/bandmill is not economically viable. If you figure out a good way...  If you used to heat a shop or home, the building would have to be really well insulated and you'd have to run copper tubing in the barrel to run water through for heat transfer.  But even doing that, it might get too hot at times for the copper and the tubing could hamper the vortex effect. 

FYI, vortex burn barrels can be even more efficient by placing a second vortex barrel (with the bottom cut out) on top of the first one.  It creates more afterburner effect and burns more of the gases coming off the wood.  There's videos about that on youtube, but it's really not very practical for us because it would make it harder to feed material in.
Anything someone can design, I can sure figure out how to fix!
If I say it\\\\\\\'s going to take so long, multiply that by at least 3!

Offline Kbeitz

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Re: Burning as we go
« Reply #9 on: April 17, 2017, 08:57:56 am »
Not mine ...But it's neat...

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