Process for dry removal of sulfur dioxide from combustion gases

Details Process for dry removal of sulfur dioxide from combustion gases Process for dry removal of sulfur dioxide from combustion gases

1977-09-06

1979-12-11

Vertiz, O. R.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

110345, C01B 1700, B01J 800

Patent

active

041783492

ABSTRACT:
Sulfur dioxide in the combustion gases from steam-generating systems is removed therefrom by mixing the gases in a reaction chamber, for a period of from 2 seconds to about 15 seconds with dry, finely divided, reactive, lime-bearing material, and then separating most of the reacted particles in a settling chamber. The reaction and settling chambers are located between the boiler and the economizer, between the economizer and the air preheater, or between the air preheater and the precipitator, with the gases being diverted through the chambers and then returned to their normal flow path. A portion of the reacted particles from the settling chamber are mixed and ground with fresh particles of lime-bearing material and recycled back through the reaction chamber, the mixture being heated, if desired, before being introduced into the latter.

REFERENCES:
patent: 2718453 (1955-09-01), Beckman
patent: 3708266 (1973-01-01), Gustavsson
patent: 3851042 (1974-11-01), Minnick

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