Method of and an apparatus for recovering sulphur dioxide...

Details Method of and an apparatus for recovering sulphur dioxide... Method of and an apparatus for recovering sulphur dioxide...

D - Textiles, Paper

21

C

D21C 11/06 (2006.01) B01D 53/50 (2006.01) C01B 11/02 (2006.01) C01B 17/60 (2006.01) D21C 11/00 (2006.01)

Patent

CA 2083899

ABSTRACT OF THE DISCLOSURE Sulphur dioxide is separated from the flue gases of a cellulose pulp mill by absorbing it into a sodium sulphite solution. Sulphur dioxide is regenerated from the sodium bisulphite solution produced by an evaporation-crystallization method utilizing thermo-compressor evaporation technique. A lamella evaporator is utilized as the evaporator-crystallizer, the evaporator being divided into separate compartments for ease of cleaning the lamella surfaces. The recovered concentrated sulphur dioxide can be used wherever desired, for example for the production of chlorine dioxide.

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