Steam recompression type vacuum drying apparatus
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United States of America Patent
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-
Nov 23, 1999
Grant Date -
N/A
app pub date -
Jul 21, 1997
filing date -
Oct 31, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A steam re-compression vacuum dryer includes a vacuum tank for accommodating waste; a first steam duct for removing steam from the vacuum tank; a steam compressor for compressing steam removed from the vacuum tank via the first steam duct and for producing a vacuum pressure in the vacuum tank; a steam condenser disposed in and/or thermally coupled to the vacuum tank; a non-condensing gas exhausting device for automatically exhausting non-condensing gas from the steam condenser; and a condensation water exhausting device for automatically exhausting condensation water from the steam condenser. If desired, a gas heater can be provided on the first steam duct to heat gas withdrawn from the tank through this duct. This gas heater may use steam discharged from the steam compressor as a heat source. The steam condensing device can be disposed in the vacuum tank, or it can be integral with an outer surface of the vacuum tank (e.g., the tank wall may have a double wall construction).
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