Has anyone ever used slabwood for thier gaser

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Jan 23, 2010
12
southwestern pa
Hello all ! has anyone used slabwood for thier gasifier? I have access to an unlimited amount of Hardwood slabs from a local timber mill for very low cost ($100) per 7 ton dump truck load. I have never tried to burn them yet for fear that they would burn too fast and I will be loading often. Have any of you tried? and if so how well did the slabs burn? a lot of people burn regular wood burners buy these slabs quite often but they tamp down thier dampers to almost chocking out the fire so slabs serve thier purpose in a non gasifier, I would hate to buy a load and then end up with the waste.

musclecar joe
 
Hum, at 5,200 lbs/cd, $100 for 2.75 cds I would go for it and try them out. Try to adjust your boiler to burn them in a reasonable matter. If it doesn't workout, you could still mix the slab wood with split wood. I can't see how you are going to loose out on this deal. I live in central NH and slab wood here is pine, and that is if you can find it. Most mills burn the slabs to heat their kilns.

Good luck
 
I think it will work good as long as you have it dry. You will get more ash as you have more bark so the btu's will be slightly less. It will also depend on what type of wood it is as how much btu's you will get. My eko will burn most anything it just depends on what it is as to how much heat I get. Right now I'm burning alot of dead poplar, ash, cottonwood, soft maple. It's stuff that is standing or fallen dead with the bark off. Some of it is dry enough and some not but the dry stuff I'm burning durring the day as I'm around and can load when ever. It's not high btu stuff but it needed to be cleaned out of the woods and it's free.
leaddog
 
Thanks for the response. I am in western Pa. and hardwoods are abundant here. The mills also burn here but there is so much scrap wood left over it is sold as slab wood, cut into firewood, or sold to paper pulp mills. In the price of $100 I must pick up in my truck. I may buy some this summer as it is green when they sell it.

on another subject, I noticed you have 500 gallons of storage. How many square feet are you heating and how long does 500 provide youwith heat?

Thanks,

Muscle car Joe
 
I am have a little trouble understanding what you are getting at. A slab is just the edge of a log that has the tapper and the outside layer of wood. It is removed to create a flat surface that will eventually turn into boards or lumber. It is the exact same chemical content as any other wood, but a slab has a nice sawn side, which means it should be able to stack tighter than split wood. The slabs will be long so you will need to cut them shorter.

Slabs make excellent firewood because very little splitting is needed and the slab thickness is commonly 2-4 inches a fast saw job. For example: I cut and stacked 1/2 cord of slabs in one hour with just a chain saw. You can't make firewood from logs that fast.

Sounds like an easy way to setup a couple of years of firewood. When biomass takes off the slabs will go that way and you will loose an easy source of firewood.
 
If you're going to buy it green this summer, then it will probably be just barely dry enough to burn next fall as slab wood drys quite rapidly because of it's size. If you stack it for a year, that wood will burn rapidly and you may need to adjust the air supply. It will make great firewood. I had some construction debris last summer and salvaged several southern yellow pine 2x4s and burned them early in the season. Since they were 30 years in the drying process they burned quite rapidly. I found that the EKO would pulsate (a series of explosions) which I attributed to fast burning fuel. By adjusting the air, I was able to stop the phenomenon.
 
Definately you can burn slabs in a gassifier and thats a great deal. I pay 70.00 for a 1.5 cords hardwood slabs . I'm now getting them to dry for next year.
 
I burn lots of pine slab wood in my Tarm, leftovers from my own small scale lumbering, sawmill, solar dry kiln, planing, and selling. Work great. Have to be just a little careful not to pack the slaps too tight to allow a little of the hot gases to circulate better.
 
I picked up a half ton truck load this afternoon . 35 dollars well spent
 
I tried a couple loads a few years back. Seemed my loads were 80% bark. While some bark has a higher btu content than the wood it covers the tables can be deceiving as they indicate BTU/ oven dried Lb. So it may take 3 cords of mostly bark slabs to equal 1 cord of wood.

But for the money it looks to be a deal. Try cutting it to length while it is still banded together, and prepare to sharpen you chain more often, lots of grit potential in the bark if it was skidded.

www.fpl.fs.fed.us/documnts/fplgtr/fplgtr29.pdf

hr
 

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