Robert W Sackett

US Patent:

48745855, Oct 17, 1989

Filed:

Mar 8, 1988

Appl. No.:

7/165312

Inventors:

Arthur F. Johnson - Boulder CO
Robert L. Sackett - Los Angeles CA

Assignee:

RCM Industries Corporation - Los Angeles CA

International Classification:

B01J 812

US Classification:

422171

Abstract:

Improved methods and apparatus for removing unwanted pollutants from flue gases are disclosed. A sequence of at least three vertical beds of particulates is disposed in the flue gas exhaust duct. A first bed comprises boiler ash or sand. Lime in the fly ash and sulfuric acid and water in the flue gas react with the particulates to form gypsum, removing the fly ash from the flue gas. In the second bed, the remaining sulfuric acid is condensed and removed on a further bed of boiler ash. In the third bed, a catalyst, typically an activated aluminous particulate with an alkali coating thereon, provided by adding ammonia to the flue gas stream, condenses out the remaining sulphur dioxide, which can then be removed from the catalyst particles in a regenerative step. A scrubber embodying these principles is readily retrofittable to pre-existing power plants burning sulphur-containing coal.

US Patent:

50614673, Oct 29, 1991

Filed:

Jul 6, 1990

Appl. No.:

7/549200

Inventors:

Arthur F. Johnson - Boulder CO
Robert L. Sackett - Los Angeles CA

Assignee:

ROM Industries Corporation - Los Angeles CA

International Classification:

C01B 1600
C01B 1169
B01J 800

US Classification:

423242

Abstract:

Improved methods and apparatus for removing unwanted pollutants from flue gases are disclosed. A sequence of at least three vertical beds of particulates is disposed in the flue gas exhaust duct. A first bed comprises boiler ash or sand. Lime in the fly ash and sulfuric acid and water in the flue gas react with the particulates to form gypsum, removing the fly ash from the flue gas. In the second bed, the remaining sulfuric acid is condensed and removed on a further bed of boiler ash. In the third bed, a catalyst, typically an activated aluminous particulate with an alkali coating thereon, provided by adding ammonia to the flue gas stream, condenses out the remaining sulphur dioxide, which can then be removed from the catalyst particles in a regenerative step. A scrubber embodying these principles is readily retrofittable to pre-existing power plants burning sulphur-containing coal.

Author:

Robert Sackett

ISBN #:

0674689852