[Gasification] Perfect Hearths

[jim mason]

it seems to me that air preheating should only mine heat from the
moment after reduction starts.  not the combustion or reduction zone.
pyrolysis zone we can debate depending on your architecture.  it seems
the best point to start mining is pretty much from the grate onwards
in the gas flow train
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i also see i flubbed the original description.  this might have been
confusing.  what was meant was "air preheating should only mine heat
from the moment after reduction ends".  not starts.    the rest of the
description tended to use the words i actually intended . . .

j