Backwashable filter

Details Backwashable filter Backwashable filter

1981-04-07

1982-11-09

Wyse, Thomas G.

Liquid purification or separation

Filter

With residue removing means or agitation of liquid

210498, 210485, B01D 2938

Patent

active

043583709

ABSTRACT:
A backwashable filter comprises a generally cylindrical housing with an inlet and an outlet, a cylindrical filter basket located within the housing between the inlet and the outlet, and a backwashing arm bearing against the inside face of the filter basket and arranged to rotate about the axis of the filter basket. The filter basket is formed by an inner and outer perforated cage with a filter medium interposed between them. The outer surface of the inner cage is configured to provide channelling between the inner cage and the filter medium to allow liquid to be filtered to contact substantially all of the inner surface of the filter medium. Direct flow of liquid to be filtered from the inside of the inner cage into the backwashing arm along the channelling is prevented by arranging the channelling axially or by arranging the channelling in the circumferential direction and then providing a wide shoe on the backwashing arm.

REFERENCES:
patent: 2910183 (1959-10-01), Hayes
patent: 3016984 (1962-01-01), Getzin
patent: 3511374 (1970-05-01), Beal
patent: 3574509 (1971-04-01), Zentis et al.
patent: 3840123 (1974-10-01), McClure
patent: 4178246 (1979-12-01), Klein

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