Decontamination of combustion gases in fluidized bed incinerator

Details Decontamination of combustion gases in fluidized bed incinerator Decontamination of combustion gases in fluidized bed incinerator

1980-12-12

1982-08-24

Vertiz, O. R.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

110345, B01J 800, C01B 1700

Patent

active

043460640

ABSTRACT:
Sulfur-containing atmospheric pollutants are effectively removed from exit gas streams produced in a fluidized bed combustion system by providing a fluidized bed of particulate material, i.e. limestone and/or dolomite wherein a concentration gradient is maintained in the vertical direction. Countercurrent contacting between upwardly directed sulfur containing combustion gases and descending sorbent particulate material creates a concentration gradient across the vertical extent of the bed characterized in progressively decreasing concentration of sulfur, sulfur dioxide and like contaminants upwardly and decreasing concentration of e.g. calcium oxide, downwardly. In this manner, gases having progressively decreasing sulfur contents contact correspondingly atmospheres having progressively increasing concentrations of calcium oxide thus assuring optimum sulfur removal.

REFERENCES:
patent: 3625164 (1971-12-01), Spector
patent: 3707462 (1972-12-01), Moss
patent: 3969089 (1976-07-01), Moss et al.

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