[Terrapreta] [Gasification] small scale charcoal making design

[gfwhell at aol.com]

 The novel machine for producing charcoal , reminds me of some experiments conducted on the reduction of "scrap iron" for the production of hydrogen. Packing a retort, "steel tube" with scrap metal and bringing the temperature up within, makes an excellent hydrogen generator, by blowing super heated steam in at one end to produce volumes of hydrogen at the other. The hydrogen is used to heat the retort with some to spare.
The product of course,  is ferric oxide, which used to be in great demand, at one time.

GF


 


 

-----Original Message-----
From: Thomas Reed <tombreed at comcast.net>
To: Discussion of biomass pyrolysis and gasification <gasification at listserv.repp.org>
Cc: terrapreta <terrapreta at bioenergylists.org>
Sent: Mon, 26 Nov 2007 7:30 pm
Subject: Re: [Gasification] small scale charcoal making design










Dear Jim:

But fire on the top, fresh wood on the bottom is best of all and gives a 
good yield of charcoal (20-30%) PLUS a very combustible and very steady 
operation, since each layer of wood has to heat the next one below. 

TOM REED     BEF

jim mason wrote:
>> Here's the instructables method of feeding the smoke back into the fire:
>> http://www.instructables.com/id/How-to-Make-some-Charcoal/
>>     
>
>
> here is a nice design for a small scale retort type charcoal maker.
> this is an improvement on the classic 55 gal drum charcoal retort as
> the volitile gas out pipe is buried in a wood fire, so the smoke is
> burned even before it is flammable by itself.
>
> the smoke problem on charcoal makers is during startup, when the smoke
> is mostly steam, and thus not flammable.  you need to vaporize all the
> water out of the wood before the gas quality will get reasonably high
> and burn.  in practice, there will nearly always be some combination
> of steam and tarry pyrolysis smoke.  and the transition to an
> adequately energy dense gas to burn can be long, and the smoke
> produced voluminous.
>
> a retort design like the above is much more controllable than a "fire
> in the bottom and raw biomass on the top" design.  such are famously
> smoky.  properly started, this design can make charcoal without nasty
> smoke.
>
> better insulation, flue gas control, and temp sensors could be added
> for controlled temp char making.
>
> jim
>
>
>   

-- 
ÐÏࡱá

_______________________________________________
Gasification mailing list
Gasification at listserv.repp.org
http://listserv.repp.org/mailman/listinfo/gasification_listserv.repp.org
http://gasifiers.bioenergylists.org
http://info.bioenergylists.org



 


________________________________________________________________________
Email and AIM finally together. You've gotta check out free AOL Mail! - http://mail.aol.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: /pipermail/terrapreta_bioenergylists.org/attachments/20071126/a7c08335/attachment.html