[Stoves] SPAM: Re: Charcoal from waste - home cooking or other markets? (Re: Crispin, Anand Karve)

[Energies Naturals C.B.]

Hello Ken,

interesting experiments with your Lister!
They remind me of one i made years ago with one of mine, though not by direct application but with a simple tube-in tube heat exchanger directly on the Lister's outlet.
I charred a small charge of ground almond shells, a leftover of our almond shell pellet substitute, and introduced the pyrolized fumes into the intake of the engine.The diesel regulator responded !
It would be very interesting to know more details of that charring process of yours.
You can contact me privetely, if you want.

Thanks a lot and greetings from an island which has the first rains after 5 month!

Rolf



On Thu, 6 Oct 2016 10:55:29 +0100
Ken Boak <ken.boak at gmail.com> wrote:

> Hi Teddy, Tom, List
> 
> Thanks for that very useful link to the Thailand charcoal gasifier site.
> 
> My interest lie in a simple low tech charcoal gasifier, and a conversion
> aimed at the single cylinder Lister, Petter and Changfa type diesel engines
> that are very common in India, Asia and Africa.
> 
> I'd like to make a "magazine" that holds several briquettes,  like bullets
> in the chambers of a revolver, and so even slightly damp, fresh biomass
> briquettes could go through a drying stage, a pyrolysation stage - and once
> completely converted to charcoal, a gasification stage.
> 
> The dryer and pyrolyser are driven from the hot engine exhaust and
> supplemented by burning the tars and volatiles - the pyrolysis gas.
> 
> Separating drying and pyrolysation in separate chambers from the
> gasification, means that the volatiles and tars produced in the pyrolysing
> process can be kept completely separate from the gasification - and result
> in a very low tar gas - which is more acceptable and forgiving to the
> engine valve gear.
> 
> Initial tests were conducted (spring 2012 at APL) in pyrolysing 3 litres of
> woodchips (0.8kg) directly  with a Lister exhaust.
> 
> These tests showed that complete conversion of  to charcoal could be
> achieved within 45 minutes - just by direct action of the hot  Lister
> exhaust through the container holding the chips.
> 
> After 20 minutes of such direct heating action, the emerging gas was
> sufficiently rich in hydrocarbons to sustain a flame.
> 
> After 45 minutes there was no further smoke, and on examination I was left
> with a fine charcoal similar to biochar - about 20% by volume of the
> original woodchip sample. Whilst this might not appear a good charcoal
> conversion efficiency - half of the charcoal fines were blown out of the
> container by the pulsating Lister exhaust!
> 
> 
> 
> 
> 
> Ken


-- 
Energies Naturals C.B. <energiesnaturals at gmx.de>