B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
23/349, 165/54
B01D 53/14 (2006.01) B01D 53/50 (2006.01)
Patent
CA 1156437
ABSTRACT A method for treating gaseous combustion products, in particular, combustion products containing sulphur dioxide and smoke gases. The combustion products are led to a scrubber in which they are brought into contact with scrubbing water, into which a base, pre- ferably calcium hydroxide, has been added for obtaining suitable neutralization of the acids created in the scrubber. The scrubbing water is sprayed into the gaseous combustion products, preferably in the form of a finely divided mist, and after the scrubbing ope- ration the combustion products are led through a heat exchanger for cooling and for recovery of condensation water. The scrubbing water used and the condensation water are collected in a settling tank, at the bottom of which solid impurities are caused to settle for removal at suitable intervals. The purified surplus water is led from the settling tank and is reintroduced into the scrubber. The amount of base mixed into the scrubbing water for converting the acids created in the scrubber into settling salts, is so cho- sen, that the pH value of the liquid in the settling tank is 7-10, preferably 8-9.
353769
Kirby Eades Gale Baker
Oy Wartsila Ab
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