Catalytic regenerative thermal oxidizer

Details Catalytic regenerative thermal oxidizer Catalytic regenerative thermal oxidizer

1992-05-08

1993-11-16

Warden, Robert J.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Waste gas purifier

422177, 422171, 4232453, F01N 310

Patent

active

052621316

ABSTRACT:
A catalytic regenerative oxidizer (18) comprises a closed casing (24) having upper and lower ends, an input port (20) at the lower end and an output port (22) at the upper end. The casing contains a plurality of stacked layers or beds, including upper (34), lower (32), and central beds (40) of silica gravel or the like. Two catalyst layers (36, 38) are provided in the stack, one between the lower and central gravel beds, and the other between the upper and central gravel beds. A heating element (42) is situated in the central bed, for maintaining at least one of the catalyst layers at an activation temperature in the range of about 500-1000 deg.F. The catalyst layers are formed by a multiplicity of ceramic pellets on which is deposited a catalyst material, such as precious metal. The contaminated gas stream enters the casing through the lower port and passes vertically through the stacked beds and layers. Oxidation of the organic compounds occurs in the catalyst layers, such that clean air is discharged through the outlet port.

REFERENCES:
patent: 3632304 (1972-01-01), Hardison
patent: 3853482 (1974-12-01), Bhan
patent: 3972682 (1976-08-01), Stephens et al.
patent: 4168228 (1979-09-01), Mallatt et al.
patent: 4650414 (1987-03-01), Grenfell
patent: 4701312 (1987-10-01), Kice
patent: 4983364 (1991-01-01), Buck et al.
patent: 4985211 (1991-01-01), Akiyama et al.

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