[Stoves] Giving up? “mobile adam-retort” 4 photos

[scda2 at t-online.de]

Giving up? “mobile adam-retort”

Dear All, 
just sharing a few experience with my „mobile adam-retort“
I did test run#5 and I might give up, as it’s too difficult to operate the retort in a smokeless way (burning smoke). And without reduced smoke there is little sense to operate such a unit near saw mills, carpenter shops in suburbs, etc.
What’s stunning me:  during syngas operation if volatiles are passing through the unit, heavy volatiles are leaving chimney. Once I close chimney, syngas is overflowing from fire box, and burned syn gas escapes into air in kind clear volatiles. OK, you will say: larger ducts, larger diameters of channels…
But how to get this done with a “light weight “ unit (~130kg).

Photos 1: Overflowing of syn gas from fire box when chimney (~500°C) closed. 4th hr of operation.

Another phenomena, volatiles are leaving chimney kind of clear volatiles, once they get in contact with ambient air- heavy smoke develops.

Photo2 : 3rd hour of operation. Shortly before large syn gas production starts (chimney ~300°C), fire wood was removed shortly after. AGiP drums just serves as a table to hold thermometer. .

Photo3: big stress on materials (!), of retort is left open until gasification dies, chimney temp rises to ~650°C, Temperature in oil drums with wood comes to 600°C also. ( = high quality , high temperature charcoal). 

Efficiency about 30% (dry weight) or ~25% of waste wood in fire box counted. Operation about 5 hours (3hrs drying + 2hrs syn gas). ~110kg of wood dry weight loaded into 2 oil drums, ~35kg of charcoal received. ~15kg of waste wood (dry weight) burnt. Cost of retort ~500US$ (?) mass production.

Fig. 1 Drawing to explain function. (Unit Is tilted 90° for loading/unloading).
22 (chimney), 23 (opening) not needed
Fire under 1st oil drum (filled with wood) is producing syngas which is burned and is heating 2nd oil drum in caskade effect...

Cheers Chris ADAM
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