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: [email protected]
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 <[email protected]> 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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