Microwave heating device for lime and calcining
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United States of America Patent
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Jun 11, 1996
Issued Date -
N/A
app pub date -
Sep 29, 1994
filing date -
May 7, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A two-zone lime mud calciner is provided for processing lime mud from kraft pulp recovery operations. A conveyer is employed for conveying lime mud horizontally through the calciner. The first zone and second zone of the calciner each contains a dielectric hysteresis heating device for first drying the lime mud in the first zone and then decomposing the dried lime mud to lime and carbon dioxide. A co-current flow of purge air removes steam generated in the first zone and a counter-current flow of purge air removes carbon dioxide generated in the second zone with a vent being provided adjacent the upstream and of the second zone.
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