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Ken Boak writes on cyclone preprep:
<snip>
.> and could be preceded by a drying chamber which not only dries
> > the fuel stock in a stream of hot air (or more likely hot nitrogen),
> > but chars it to the point of it becoming friable and easily broken
> > up into smaller particles. I imagine a revolving drum - not unlike
> > that of a washing machine, where chipped wood enters at one end and
> > is tumbled between an inner and outer drum, drying and then charring.
>
The idea is good.
This is exactly what some of us other biomass-for-power folks have been
working on for a while. Doing this with steam.
Making easy friable wood pieces (lumps or chips).
But not for gasification, just for direct pulverizing and cofiring in
boilers.
After all, why go through an enormous additional expense of gasifying if you
just can easily cofire this friable wood without any additional expense?
best regards,
Andries Weststeijn
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