Catalytic dryer

Details Catalytic dryer Catalytic dryer

1990-06-06

1992-08-04

Bennett, Henry

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 27, 34 32, 34 79, F26B 504

Patent

active

051347873

ABSTRACT:
A dryer apparatus and a drying method are set forth for drying an object coated with a solvent which volatilizes to form a VOC. The object is fed through an enclosure. It is heated to volatilize the VOC while it is in the enclosure. A catalytic oxidation unit is provided which oxidizes substantially all VOCs which flow through it. A VOC containing first gas from the enclosure is introduced to an upstream end of a catalytic oxidation zone in the catalytic oxidation unit. A substantially VOC free second gas is led away from a downstream end of the catalytic oxidation zone. Heat is exchanged between the hot second gas and the first gas. The first gas is pumped from a first location in the enclosure and impelled into and through the oxidation unit. A sufficient portion of the second gas is impelled into the surrounding atmosphere to maintain a pressure below that of the surrounding atmosphere within both the oxidation unit and the dryer enclosure.

REFERENCES:
patent: 3183604 (1965-05-01), Stauffer
patent: 3551189 (1970-12-01), Gray, Jr. et al.
patent: 3710756 (1973-01-01), Goyffon
patent: 4343096 (1982-08-01), Bergland
patent: 4475294 (1984-10-01), Hendricks
patent: 4694586 (1987-09-01), Reznik
patent: 4702892 (1987-10-01), Betz
patent: 4867949 (1989-09-01), Betz

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