[Gasification] new pellet mill source, and cuber question

[jim mason]

> ------------------------------------------------------------------------
> I think Greg may be using a nozzle type gasifier (WWII).  The air comes
> in horizontally, burns local gas and diffuses both up and down in the
> incoming fuel.  In areas between the nozzles there is slower heating and
> if high moisture gas circulates it could cause the "fluffing" described
> by Greg.  Conventional pellets are certainly very moisture sensitive and
> must be stored and used in dry conditions.
>
> Comments?
>


i doubt it is related to the space between the nozzles.  it is more
likely simply the sealed top, which is well known to create a hot and
steamy fuel hopper.  even with a monorator as greg runs.

even with the low moisture content of pellets, a full hopper is going
to generate a good deal of steam when the gasifier gets up to temp.
all that is going to hang out in the fuel hopper.  and such will fluff
the pellets.

an open top stratified downdraft, like thomas is likely running, won't
do this.  the open top prevents heat and steam build up, as it rises
out the top.  this is likely why i didn't see it either, as i was
reporting on behavior in an open top stratified downdraft.

yes, pellets are very sensitive to moisture.  i've ruined some left
out with a poorly sealed bag.

j