Process for the recovery of heat and chemicals from spent liquor
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United States of America Patent
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May 12, 1992
Issued Date -
N/A
app pub date -
Aug 7, 1990
filing date -
Apr 25, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for the recovery of heat and chemicals from spent liquor by evaporating water out from it in order to concentrate the liquor and be feeding the concentrated liquor thereby obtained and air into the soda-ash furnace. In order to increase the dry-matter content of the liquor to a level higher than usual, without at the same time increasing the viscositty of the liquor immoderately, at least the final concentrating (5, 9) of the liquor and its feeding (16) into the soda-ash furnace (4) are carried out under pressure at a temperature higher than the atmospheric boiling point of the liquor.
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