D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
9/37
D21C 11/06 (2006.01) D21C 11/04 (2006.01)
Patent
CA 1156406
ABSTRACT The invention relates to a method at the liquor recovery process and more precisely after the melt dissolver and at causticizing in a continuously operating mixing depart- ment. From the melt dissolver the waste gases are led through the vapour pipe and to the vapour condenser and condensate separator via a reconnected scrubber, which uses first water as wash liquor and after the washing with the first water discharges the wash liquor with the substances washed out from the waste gases included therein directly to the suction side of the first water pump for feed to the melt dissolver. The processing tanks comprised in the mixing department, the lime-slaker with sorter, causticizing tanks and inter- mediate tank, are provided with scrubbers in the vapour pipes, in which scrubbers the waste gases flowing out are washed and cooled by atomized cooling water. Due to the pressure decrease thereby effected, vacuum is created in the respective tank. The heat in the waste gases can be recovered in the form of hot water.
344579
Gowling Lafleur Henderson Llp
Lindroos Runar I.
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