[Stoves] Blue Flame -- Natural Draft -- Rice Husk

[Kobus Venter]

Yes Richard, good times and great work Marc. John Davies taught us that 
if you seal of the combustion chamber and only have primary air enter at 
the base through a bed of burning coals (that has been top lit yes), you 
can have a clean burning blue flame at the ignition point (the burner 
attachment being the catalyst).  Much of this was been patented in 2006. 
This video with John talking in the background about igniting mined coal 
at the top (although this demo was with charcoal and no agri-residues), 
demonstrates the concept. The flame quality improved in subsequent 
burns: http://youtu.be/KLdI0GuOOtk leading up to the image that Richard 
attached. I think it was closer to 2003. Charcoal gasification is less 
finicky than rice husk gasification and we have proved you don't need 
forced air to achieve it, but we won't be able to replicate that 
beautiful blue color.

Regards

Kobus

On 2013/08/24 12:45 AM, stoves-request at lists.bioenergylists.org wrote:
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> Message: 9
> Date: Fri, 23 Aug 2013 15:45:55 -0700
> From: Richard Stanley <rstanley at legacyfound.org>
> To: Discussion of biomass cooking stoves
> 	<stoves at lists.bioenergylists.org>
> Cc: Venter Kobus <ventfory at iafrica.com>
> Subject: Re: [Stoves] Blue Flame -- Natural Draft -- Rice Husk
> Message-ID: <C373A76F-72DF-4675-AEC0-D3DC232637E0 at legacyfound.org>
> Content-Type: text/plain; charset="windows-1252"
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> Marc, great work to pull this off with rice husks consistently is some feat:
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> Kobus Venter and I managed same in south Africa with charcoal-agro residue blended hollow core briquettes in his stove but it was hard to replicate and very sensitive to any wind. Nevertheless it really kindles the spirit to see those blue flames  eh ? We also managed this with no forced air; It was almost by accident that it happened: Just on a lark after hours of trying different tin can ends with various holes in them for Kobus' stove top, I got ahold of a regular gas stove top diffuser (thats what I termed as the last thing between the gas outlet and the cooking pot) ..and stuck it down over  kobus' gassifier stove and voila?
> ...but again, was very sensitive to air flow. And, as that stove required top loading of the  fuel, it killed the burn for several minutes afterwards, but for that short ~ 20 minute long glimpse of blue flames !!! (You just have to experience it eh ?)
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> Now, if one can come up with a way to ignite what you've got, with push button spark or heat element convenience, for near immediate ignition, you'll enter the market for mass consumption of biomass fuel/ stoves, supplying what the consumer really wants:
> The real smell of natural,well combusted  biomass with the convenience of gas?
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> Richard Stanley
> Pietermaritzburg, south Africa and Kobus Venters house, Nov. 2000
>     Those were the best tasting steaks steaks this side of wherever,  eh Kobus ?
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