[Gasification] Chunking wood for small scale biochar production

[Paul Anderson]

Rolf,

I hope that you can find the photos, and revive this topic.   New 
developments in the past decade might offer some better solutions.

Paul

Doc  /  Dr TLUD  /  Prof. Paul S. Anderson, PhD
Email:  psanders at ilstu.edu
Skype: paultlud      Phone: +1-309-452-7072
Website:  www.drtlud.com

On 1/1/2014 6:43 PM, energiesnaturals wrote:
> Hello chunkers,
>
> For small manual chunking devices I cannot help much, but I see that 
> there is also some interest in more mecanized solutions.
>
> At least in Europe you can still find many of the old Jensen 
> woodchoppers with 6 and 12 cm long chunks produced and up to15 cm 
> diameter.
>
> I remember putting a series of fotos on the list some years ago, 
> perhaps on the bioenergy list.
>
> Have a good year!
>
> Rolf
>
>
>
>
> Enviado desde Samsung tablet
>
> David Coote <dccoote at mira.net> escribió:
> An inexpensive tool to chunk efficiently wood for small scale biochar
> production would be very handy. I have loads of waste woody biomass on
> my farm. There's no community scale biomass energy plants in the
> northern hemisphere sense in Gippsland (SE corner of Australia) so no
> local markets of this nature for the material. This may change in the
> next few years but in the interim I'd like to make some char as a
> weekend project. One of my nephews is a qualified boiler maker with
> tickets for various specialist welding techniques. He's interested in
> building a small char system. This would probably be similar to the
> popular 44 gallon drum with internal retort (so an indirect
> implementation) but using a better quality steel so a bit longer
> lasting. And we'll lag the drum, put a safety enclosure around it and 
> so on.
>
> One of the challenges of trying to do this beyond a hobby approach is
> chunking the material to be used for  combustion and char. I haven't got
> time to lovingly handcarve the feedstock into the appropriate size and
> form. Using an axe, saw, firewood splitter, bypass pruners would all be
> possible for different sized feedstocks (windthrow, prunings, thinnings,
> harvest residue etc) albeit labour intensive.  Something like an old
> chaff cutter would be very useful for some feedstocks. I think there are
> some commercial chunkers that would do what I want but they are
> prohibitively expensive
>
> David
>
>
>
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