Process for purifying condensate while evaporating waste liquors
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United States of America Patent
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Jul 10, 2001
Grant Date -
N/A
app pub date -
Aug 19, 1998
filing date -
Nov 1, 1995
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Abstract
A process for evaporating spent liquor or other waste liquids from cellulose cooking, The evaporation is performed in a multiplicity of evaporators which are coupled in series and in which the evaporation is driven using the liquor steam. The condensates from the steam are divided, in one of more effects, into at least two fractions with respect to purity. The parer fraction from one effect is conveyed, at a high level, into a subsequent effect in the direction of movement of the liquor, while the dirtier fraction is conveyed, at a high level or at the very top, into a preceding effect in the direction of movement of the liquor.
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