Method of and apparatus for cleaning filters in tangential micro

Details Method of and apparatus for cleaning filters in tangential micro Method of and apparatus for cleaning filters in tangential micro

1991-07-25

1992-09-15

Dawson, Robert A.

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210636, 210409, 210106, 210111, 210134, 2101952, B01D 6100

Patent

active

051475529

ABSTRACT:
A method of and an apparatus for tangential filtration with filter cleaning in which a fluid to be filtered forms a liquid loop and circulates tangentially to one surface of a membrane at a pressure Ph in which a filtrate flows from the other surface of the membrane through a pipe, provided with a flow meter and a first valve, to a tank at atmospheric pressure Pa, filtration taking place by virtue of a positive transmembranal pressure Ph - Pa. In the filtration phase, the hydrodynamic pressure Ph is adjusted by means of a second regulable valve. During the filter cleaning phase the first valve is closed and at the same time the second valve is slightly opened, the second valve is suddenly opened, the first valve is opened and the second valve is progressively closed. The method and apparatus in particularly suited to the filtration of corrosive liquids.

REFERENCES:
patent: 3819513 (1974-06-01), Ishii et al.
patent: 4581236 (1986-04-01), Baudel et al.
patent: 4618431 (1986-10-01), Hindman et al.
patent: 4678477 (1987-07-01), Zhe et al.
patent: 4921610 (1990-05-01), Ford et al.

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