Lime scrubbing process for sulfur dioxide removal from gases

Details Lime scrubbing process for sulfur dioxide removal from gases Lime scrubbing process for sulfur dioxide removal from gases

1978-01-30

1979-08-14

Vertiz, O. R.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

C01B 1700

Patent

active

041645499

ABSTRACT:
A method for scrubbing sulfur dioxide from gaseous streams using a calcium salt-containing aqueous liquor having 250-5000 parts per million of magnesium ion to enable fast and efficient return to operation following a period of interruption of the gaseous flow by adjusting the pH of the liquor to a value between 9.8 and 12.0 during said interruption to convert sulfite ion species in the liquor to solid magnesium hydroxide and prevent oxidation thereof, and adding magnesium-containing lime to the liquor after resumption of the scrubbing process when the pH of the inlet liquor has dropped below 9.8 to the previous operational mode.

REFERENCES:
patent: 2113198 (1938-04-01), Nonhebel et al.
patent: 3919393 (1975-11-01), Selmeczi
patent: 3919394 (1975-11-01), Selmeczi
patent: 3944649 (1976-03-01), Field

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