[Stoves] Pyrolysing side draft stove, 1982

[Crispin Pemberton-Pigott]

Dear Friends

 

Interesting set of features on this stove:

 

 <http://www.freepatentsonline.com/4309965.pdf>
http://www.freepatentsonline.com/4309965.pdf

 

It looks like it is a wood-pyrolysing sidedraft gas-burning concrete-lined
combustor attached to a water heater.

 

It claims to be creating pyrolysis gases, feeding them sideways from the
bottom of the hopper together with (fan-driven) secondary air creating a
flaming zone separate from the combusting/pyrolysing biomass zone. It does
this in a very restricted primary air environment and burns whole logs. It
can be refuelled continuously because the fire is on the bottom of the
chamber.

 

It makes frequent mention of refractory materials cast in situ and the
complete burning of the gases.

 

Another one might be of interest to the jatropha cake burners:

 

 <http://www.freepatentsonline.com/1469600.pdf>
http://www.freepatentsonline.com/1469600.pdf

 

It claims to be able to burn duff coal (small, to dust). Maybe with a wire
grate instead of the cast iron shown. Note that it has an updraft channel
for getting the fire started. Many stoves this size have such a feature. It
is often re-invented as a solution to the difficulties faced getting
downdraft stoves started.

 

Regards

Crispin

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