Forced fluid induced backwash

Details Forced fluid induced backwash Forced fluid induced backwash

1998-09-14

2000-10-24

Popovics, Robert J.

Liquid purification or separation

Processes

Including controlling process in response to a sensed condition

210780, 210784, 210791, 210798, 210107, 210108, 210392, 210402, 210411, B01D 3704, B01D 3350

Patent

active

061362026

ABSTRACT:
A system for filtering fluids uses the pressure differential across a filter element between an internal filter volume and an external filter volume to control the rate of fluid flow through the filter element. The internal filter volume communicates with a backwash volume contained in the external filter volume. The backwash volume may be movable relative to the filter element to clean accumulated filtrate from the filter element through backwashing. By increasing the pressure in the internal filter volume, the rate of backwashing can be increased while the rate of fluid flow into the internal filter volume is decreased. Particularly when the filter element becomes clogged, damage to a filter caused by an excessive pressure differential across the filter element may be decreased.

REFERENCES:
patent: 5330645 (1994-07-01), Geldmacher
patent: 5494591 (1996-02-01), Stamm et al.
patent: 5628916 (1997-05-01), Stevens et al.
patent: 5632903 (1997-05-01), Caracciolo, Jr.
patent: 5855799 (1999-01-01), Herrmann

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