Washing tower for the desulfurization of flue gases

Details Washing tower for the desulfurization of flue gases Washing tower for the desulfurization of flue gases

1983-07-20

1985-05-07

Richman, Barry S.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Waste gas purifier

55228, 55DIG30, 261 2, 261122, 261DIG9, 422231, 422234, 423242, C01B 1705, B01D 4700, B01D 5334

Patent

active

045157545

ABSTRACT:
A scrubber is provided with a grate in its sump through which oxygen is introduced to separate the oxidation zone above this grate from a reaction zone below the grate, a calcium containing additive being introduced into this reaction zone. Flue gas to be desulfurized is passed through a washing zone above the sump and there contacted with normally circulating scrubbing liquid containing the additive to absorb sulfur dioxide and sulfur trioxide. The sulfur dioxide is oxidized to sulfur trioxide and the additive induces precipitation of calcium sulfate in the sump. After a prolonged standstill, settled solids in the sump are induced into movement by drawing a portion of the sump liquid from an upper part thereof and injecting it into a lower part of the sump.

REFERENCES:
patent: 4102303 (1978-07-01), Cordier et al.
patent: 4102657 (1978-07-01), Mehta
patent: 4195062 (1980-03-01), Martin et al.
patent: 4366132 (1982-12-01), Holter et al.
patent: 4389351 (1983-06-01), O'Brien
patent: 4427553 (1984-01-01), Fore
patent: 4431608 (1984-02-01), Kataguri

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