Method and apparatus for vacuum drying colloidal substances
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United States of America Patent
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-
Sep 20, 1994
Grant Date -
N/A
app pub date -
May 24, 1993
filing date -
Jun 9, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A colloidal substance is injected into a vacuum chamber to be dehydrated therein. The dehydrated substance is extracted from the vacuum chamber by a screw extruder disposed at a bottom of the vacuum chamber. A gas resulting from the dehydration is drawn from the vacuum chamber into a surface condenser to be cooled through an indirect heat exchange with cooling water. After the dehydration of the substance, the extraction of the dehydrated substance and the cooling of the gas are carried out in parallel.
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