Concentrating evaporators – Processes – Involving waste liquid
Patent
1990-08-07
1992-05-12
Manoharan, Virginia
Concentrating evaporators
Processes
Involving waste liquid
159 21, 159 22, 162 31, 162 47, 203 2, 203 14, 203 73, 203 80, 203 88, B01D 100, B01D 306
Patent
active
051124416
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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Hyoty Paavo
Kuukkanen Kari
Ruohola Tuomo
Saiha Erik
Manoharan Virginia
OY Tampella AB
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