Process for the final evaporation of black liquor
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United States of America Patent
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Aug 31, 1999
Grant Date -
N/A
app pub date -
Jun 27, 1997
filing date -
Oct 20, 1994
priority date (Note) -
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Abstract
The process for the final evaporation has at least two evaporation appliances. These appliances are coupled in series with respect to the black liquor and in parallel with the live steam (primary steam), which drives the evaporation, and with the secondary steam that is generated by the evaporation. The pressure of the primary steam that is supplied to the appliance(s) where the liquor concentration is at the highest concentration is greater than the pressure of the primary steam supplied to the other appliances where the liquor concentration is not so high.
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