Author Topic: biomass gasifiers  (Read 2622 times)

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Offline NObshere

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biomass gasifiers
« on: July 09, 2013, 07:50:03 PM »
Some questions on this system of power/heat production. A few sites have claimed that their gasifiers, with 2 lbs of fuel will produce 2kw and burn for 2 hours. Is this low grade fuel or a  higher grade fuel, such as coal? Does the spent fuel turn into ash,tar, coke,charcoal,or anything toxic? How many tons of fuel would it take (wood chips or coal) to run a 75 kw system year round? ( house-3 freezers,lights,hot water tank...) (shop- welder, saws, power tools) I had not heard of gasifiers until recently and would have bought a system instead of running steam power. One of the sites that interested me was:

http://www.vulcangasifier.com/

I guess these questions are mostly directed towards Ranger as I've noticed on a few posts that he's mentioned being able to build one. If you could, check out the site for me and tell me what you or anyone else thinks that would be great. Thanks

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Offline Ranger2012

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Re: biomass gasifiers
« Reply #1 on: July 10, 2013, 07:09:07 AM »
Much to do with gasifier, has to do with the fuel and charge rate. You'll want wood chips that wont chinker up to much and block the grating. Most hard woods are a good burn and will prevent this. The amount of gas that you get out of it will depend on your charge rate, or how much area is being burned at one time. A 3, 4 or 6in.dia. burn chute is normal, 8 and above is commercial. Also what to look at is the air delivery system, is it top draft or side injected. For the best results, insure that you wood chips are as dry as possible. Most of this is relevant only if you plan to make your own. If your buying one than you are going to run it in accordance to manufacture specifications and use what ever fuel type that the tell you. For more information on basic gasifiers, go to FEMA site and download the Imbert gasifier in PDF.
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Offline Ranger2012

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Re: biomass gasifiers
« Reply #2 on: July 10, 2013, 01:38:52 PM »
Here is a standard setup for a Gasifier.
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Offline NObshere

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Re: biomass gasifiers
« Reply #3 on: July 11, 2013, 06:04:29 AM »
Thanks Ranger, I was looking at a Vulcan ES II (75 Kw) to run my shop. Was also wondering if a Honda genset could be converted to use the gases produced.
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Offline Ranger2012

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Re: biomass gasifiers
« Reply #4 on: July 12, 2013, 03:38:53 AM »
 The only vapors should be coming from the fuel exhaust port. On start up, you will have a fair amount of mixed exhaust/water vapor until you have a proper char bed. A properly burning gasifier, will burn 1 to 1-1/2 cubic feet of wood chips in 2 hrs. Hardwoods burns to ash, soft deciduous wood will make chinker and clog up your grate. Clear the ash daily.
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Offline NObshere

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Re: biomass gasifiers
« Reply #5 on: July 15, 2013, 07:17:14 AM »
Thanks for the info Ranger. Did you get a chance to checkout the Vulcan site? Your opinion would be greatly apreciated. Also are there any Canadian manufacturers, that you know of? Thanks again.
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Offline NObshere

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Re: biomass gasifiers
« Reply #6 on: October 08, 2013, 09:25:40 AM »
Some more fuel questions. Dry horse or chicken manure should work as well at least in theory?
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Offline Ranger2012

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Re: biomass gasifiers
« Reply #7 on: October 12, 2013, 07:40:50 PM »
You must know that manure contains a great amount of nitrates, in which although burns hot, and, can in the end erode your gasifier a great deal.
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Re: biomass gasifiers
« Reply #8 on: October 13, 2013, 03:12:09 AM »
Even if it is dry?
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Offline Ranger2012

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Re: biomass gasifiers
« Reply #9 on: October 13, 2013, 11:44:43 AM »
Even dry, when thinking of chicken poop, think of guano, it was harvested for centuries because it made great fertilizer and gunpowder. Nitrates, ammonia nitrate, potassium. all within chicken poop. Horse manure has less nitrates and more fiber, when dried should make a better burn.
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