Method for cyclic rejuvenation of an exhaust gas filter and apparatus
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United States of America Patent
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-
Feb 8, 1983
Grant Date -
N/A
app pub date -
Mar 3, 1980
filing date -
Mar 3, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A system for filtering combustible particulate matter from an exhaust gas stream, and for periodically rejuvenating the filter by thermally incinerating retained particles prior to their reaching the main filter. At least a part of the exhaust gas stream which enters the filter bed is periodically heated in a pretreating chamber. The latter comprises a catalyst coated oxidizing bed into which fuel, and heated air are metered to initiate combustion. The products of said combustion are thereafter combined with the exhaust gas to bring it to a sufficient temperature to incinerate the carried particles.
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