Appeal No. 1997-3785
Application No. 08/527,591
part of the “clean” gases through the regenerator to cause the
undesirable compounds held therein to be forced out into the
combustion chamber. Such a system, and the prior art method
for operating it, are described in the appellants’ claim 1 in
the preamble and paragraphs a) through d).
The appellants further explain that in order to properly
purge the regenerators, the external surface of the packing
material contained therein and the associated plenum and ducts
must be cleared of any volatile organic material that has
accumulated during the passage of the gases through the
regenerator while it was on line. Some of these materials,
however, have not effectively been removed by the recirculated
stream of clean gases utilized in the prior art systems, which
normally comprises no more than 10% of the total exhaust. An
objective of the appellants’ invention is the more effective
removal of liquid deposits and other residues from the
regenerators and their associated elements. The basic means
by which the appellants’ invention accomplishes this objective
is increasing the temperature of the portion of the clean
gases which are used to purge the regenerators. The invention
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