[Stoves] Powerful Little Gasifier

[andrew schofield]

Hi Masseurs Miles, Piggot,

  Please note the question a stover asked a few weeks ago was about Jatropha seed PRESS-CAKE, which may be very different than whole seeds.

 I described a fluidized-bed cherry pit combustor a few years ago on the gasification forum:
Cherry pits circulate like boiling water when a bed is fluidized by a degree of higher velocity air from beneath the bed.
The same effect is seen either when the pits are cold, or at pyrolizing temperature.
There seems to be a certain critical velocity where the pits begin to circulate.

 Someday I shall work out correct free-board, and amount of over-fire air, to prevent the hideous black smoke that issues from the gasifier maw.
To sustain reaction for hours, cherry pits roll into the maw; similar to Dr Reed's cool animation on The BEF website:

http://www.woodgas.com/gasification.htm

Click the animation start button and watch those pits GO (in a down draft gasifier)... I am entertained easily with simple things...

Pits happily act like ball-bearings in a feed system. 
To utilize a paste-like mass left over from mechanical seed-oil extraction, an extrusion of the waste paste could be metered into the maw for co-combustion with pits.
Most places in the world do not have cherry pits. So a special refractory "grog" could be heated, and circulated to burn gooey pastes alone.

Please wear eye protection when gasifying stuff,

Andrew Schofield
Renewable Fuel Systems






 		 	   		  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20110202/b8a4c15d/attachment.html>