Process for purifying flue gases

Details Process for purifying flue gases Process for purifying flue gases

1987-06-26

1988-12-27

Prunner, Kathleen J.

Gas separation

Means within gas stream for conducting concentrate to collector

55 22, 55 89, 55 90, 55 93, 55DIG9, 252630, 252632, 422159, B01D 5000

Patent

active

047938315

ABSTRACT:
A process for purifying flue gases by conducting the hot gases through a dry purification stage, and then through a pebble bed evaporator containing pebbles and a liquid. The flue gases then exit the pebble bed evaporator and are washed in a wet washing step. Waste liquid containing dissolved material from the wet washing step is then used as the liquid in the pebble bed evaporator; as this liquid evaporates in the pebble bed evaporator, solid precipitate forms on the pebbles. This solid precipitate is removed from the evaporator and is stored. Vapor from the pebble bed evaporator is condensed and used in the wet washing step. The purified flue gases exiting the wet washing step pass through a filter stage and are discharged.

REFERENCES:
patent: 2578315 (1951-12-01), Parker
patent: 2953218 (1960-09-01), Coates
patent: 3418788 (1968-12-01), Sugimoto
patent: 3785119 (1974-01-01), McIlvaine
patent: 3984217 (1976-10-01), Huntington
patent: 4229411 (1980-10-01), Kisters et al.
patent: 4251236 (1981-02-01), Fattinger et al.
patent: 4317806 (1982-03-01), Leisegang
patent: 4416855 (1983-11-01), Abrams et al.

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