Method and arrangement for treating gaseous combustion products

Details Method and arrangement for treating gaseous combustion products Method and arrangement for treating gaseous combustion products

1980-06-10

1982-04-06

Spitzer, Robert H.

Gas separation

Means within gas stream for conducting concentrate to collector

55 73, 55222, 55227, 55228, 422111, 422173, 423242, B01D 5314

Patent

active

043233716

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, preferably 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 operation 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 chosen, that the pH value of the liquid in the settling tank is 7-10, preferably 8-9.

REFERENCES:
patent: 3533748 (1970-10-01), Finfer et al.
patent: 3607001 (1971-09-01), Finfer et al.
patent: 3897540 (1975-07-01), Onnen
patent: 3907526 (1975-09-01), Saleem et al.
patent: 4147756 (1979-04-01), Dahlstrom et al.
patent: 4208383 (1980-06-01), Kisters et al.
patent: 4213946 (1980-07-01), Furuta et al.

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