Method of removing SO.sub.2 and/or other acid components from wa

Details Method of removing SO.sub.2 and/or other acid components from wa Method of removing SO.sub.2 and/or other acid components from wa

1975-06-30

1977-08-02

Wyse, Thomas G.

Gas separation

Means within gas stream for conducting concentrate to collector

55 73, 55 89, 423242, B01D 5314, B03C 100, C01B 1700

Patent

active

040393046

ABSTRACT:
Waste gas is contacted with a solution of a salt from a pollutant of the gas. This solution is obtained from another stage of the process used for cleansing or purifying the gas. The resulting mixture of gas and solution is subjected to vaporization so as to obtain a dry gaseous substance constituted by the waste gas and the evaporated solvent for the salt. The gaseous substance thus formed contains crystals of the salt as well as the pollutant present in the original waste gas. The salt crystals and other solid particles are removed from the gaseous substance in the form of a dry solids mixture. The gaseous substance is subsequently mixed with an absorption fluid such as an ammonia solution in order to wash out and redissolve any salt crystals which may remain in the gaseous substance and in order to remove the pollutant present in the original waste gas from the gaseous substance. The pollutant and the redissolved salt crystals form a salt solution together with the absorption fluid and it is this salt solution which is brought into contact with the waste gas. The gaseous substace is exhausted to the atmosphere after being mixed with the absorption fluid.

REFERENCES:
patent: 2598116 (1952-05-01), Du Bois
patent: 2628193 (1953-02-01), D'Alelio
patent: 3305307 (1967-02-01), Spormann et al.
patent: 3405508 (1968-10-01), Peters et al.
patent: 3456709 (1969-07-01), Vegeby
patent: 3485014 (1969-12-01), Atsukawa et al.
patent: 3772854 (1973-11-01), Tamura et al.
patent: 3785119 (1974-01-01), McIlvaine
patent: 3907526 (1975-09-01), Saleem et al.
patent: 3932587 (1976-01-01), Grantham et al.

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