sawdust fueled direct fired continuous dry kilns

[Craig Jensen]

Anyone here have experience with sawdust fueled direct fired continuous dry kilns for softwoods?   I have been asked by my superiors about them, and all I have is a basic theoretical understanding.  No actual experience with the concept.   

Looking for pros, cons, advantages, disadvantages, and things a newbie might not expect.

Has anyone installed them in the current MACT environment and if so, any ideas on the emissions side?

Thanks in advance.

CJ

[MichaelM]

Craig,
I can't comment on the emissions from a direct-fire kiln.  I will say that the MACT regulations are implemented at the state level.  Any direct-fired continuous kiln is likely to be in the Southern U.S.  Their regulators may have a different take on the subject than regulators in your state (I'm assuming you're in the West when I say that).  Please let us know what you find out.
Mike
Wood Moisture Solutions
OSU, retired