[Gasification] Gasification of briquettes

[sabbadess at aol.com]

John,

I got around the bridging issue by angling my 6 nozzles down at 45 degrees.  As a general rule I make my nozzles point just above the restriction.  By doing this it creates a hanging "icicle" of fuel which isn't touching the sidewalls.  That way if the creosote creates a cap it still has to fall down.  

The down angling has also helped clean up my gas because there is less material pyrolizing for the amount of oxygen present.  Many folks have been skeptical of this notion because there is no "plane of combustion" but the cleanliness of my piping tells a different story.

Please see the attached picture.  For the rest of the list members the picture is at 

http://groups.yahoo.com/group/WoodGas/photos/album/118107394/pic/2112012305/view?picmode=&mode=tn&order=ordinal&start=21&count=20&dir=asc

if you belong to the Yahoo woodgas group.

Stephen Abbadessa
-----Original Message-----
From: john blount <johnblount448 at hotmail.com>
To: Ken Koch <gasification at lists.bioenergylists.org>
Sent: Sat, Feb 12, 2011 9:07 am
Subject: [Gasification] Gasification of briquettes


I have a gasifier (Fluidyne design) that works excellently with two inch chunks of wood, but when we switched to burning briquettes (compressed shavings and sawdust) everything changed so much that we no longer can sustain gas production, plus have extreme amounts of slipped char and cyclone particulates.
Has anyone experience in gasifying such fuel?
The swelling from steam in the hopper causes bridging that did not occur with the chunks, but that should be easily overcome, perhaps with a monorator hopper?
Thanks,
John Blount  


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