OK folks, its me the old Geezer back again. What we did with one of our
models was to use the walls of the Fuel hopper as a condenser to remove
excess moisture from the fuel. . In the tropics, particularly during the
wet season, it is almost impossible to air dry fuel wood. And we were also
looking for a supply of Stockholm tar or other wood preservative as well.
So, we made a circular channel of C section about two by two inches and
welded it onto the top of throat section of the gasifier and dropped a
bare 44 gallon barrel or drum into the channel leaving a internal lip or
gutter to catch all the condnesation from the insideof the drum and channel
it to the outside through a tap on each side. The fuel hopper /drum was
held in place by ramming a line of packing between the outside of the drum
and the outer side of the channel, which was a close fit. Initially it
worked fine. Copious quantities of pyroligneous acid and a hotter fire in
the gasifier itself. Hotter, but still not hot enough to get a good gas.
However the inner gutter soon filled up with fragments and bark. And
unless one kept the fuel hopper full of fuel wood and evaporating large
quantities of water the condensate soon thickened up to really stiff tar
which would only flow if it was very hot. O.K. we did end up with Stockholm
tar, but we soon decided that with an uninsulated fuel hopper we were
losing too much valuable heat and so the Tar Baby, as we called it, was not
encorporated into the next model. Ken C.
--- Original Message e -----
From: "Rolf Uhle" <[email protected]>
To: "Discussion of biomass pyrolysis and gasification"
<[email protected]>
Sent: Monday, December 27, 2010 11:07 AM
Subject: Re: [Gasification] Drying fuel with IC exhause and
otherpleasures...
Am Sonntag, 26. Dezember 2010 18:08:31 schrieb GF:
"> If so, additional heat needs to be applied to this area in order to
convert
the "water trapped within the fuel" in to super heated steam, just before
being drawn through the "reaction zone". Perhaps we should consider the
ICE
as the primary provider of heat for pyrolization, and build the gasifier
around it."
Yes , very much so! This is how Jim set up the GEK and it could even be
improved.
Less energy to be provided by the oxidation process means less air/less
nitrogen in the process. It means a " richer poor gas"
happy new year, btw
Rolf
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