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Woodworks

Any new small charcoal retorts out there?

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Hi Richard,
Have grading over a 12.5mm screen I get about 120 kg of charcoal. Depends on the species.
Since April 2017, I’ve done 58 burns producing & selling approx 7 tonnes of charcoal.

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On 22/03/2017 at 21:41, TRADITIONAL LOGGERS said:

A portable version on a 750KG single axle trailer would be ideal. I would like to collect wood tars to use for various products.

Messing around with a new gas burning system last night and collecting wood tars my now be an option. Any ideas on how it is harvested so to speak? Fitted a gas overflow pipe to mine and plenty of wood tar was condensing on the secondary flue. Thing is it's coming out the same pipe that the excess gas does and I need to flare that for a clean burn. 

IMG_20180731_221858.jpg

Edited by Woodworks

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3 hours ago, Woodworks said:

Messing around with a new gas burning system last night and collecting wood tars my now be an option. Any ideas on how it is harvested so to speak? Fitted a gas overflow pipe to mine and plenty of wood tar was condensing on the secondary flue. Thing is it's coming out the same pipe that the excess gas does and I need to flare that for a clean burn. 

Traditionally it was a condenser followed by the flare or in more sophisticated plants, like the german one that produced acetic acid from beech at the end of the 19th century, the true gases (H2, CH4,CO,CO2 N2 and lighter vapours)  after the condenser/fractionating column went to a large single cylinder SI engine. It must have been high maintenance as the tarry gases would have contaminated the oil and coked up the combustion chamber. I read that two men would get in and clean the valves with pick axes.

 

Starting simply you could use the smallest diameter pipe that doesn’t restrict flow for the flare, with a Y junction at base and collect the tarry acid (pyroligneous acid) at the bottom. Spray water on the top so it is wet all the way down using a pond pump. You will need to dismantle it occasionally when hot to burn off the residues.

 

Also it will contain phenol like compounds and these are potentially carcinogenic.

 

 

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