Filter backwashing system using moveable member responsive to cl

Details Filter backwashing system using moveable member responsive to cl Filter backwashing system using moveable member responsive to cl

1991-11-18

1993-08-10

Drodge, Joseph W.

Liquid purification or separation

Processes

Including controlling process in response to a sensed condition

55283, 210108, 21033301, 210391, 210411, 210791, 95279, B01D 3348, B01D 2966, B01D 3512

Patent

active

052346056

ABSTRACT:
A method and apparatus for filtering a fluid flowing from a fluid supply duct in a first direction through a filtering medium in which separate solid particles or concentrate are released from the filtering medium by a back-flush. The method and apparatus has a moving means, such as a diaphragm, which receives the pressure of the fluid at both the inlet and outlet of the filter. In response to a changing pressure, such as by opening of an outlet valve, the moving means operates, e.g., the diaphragm changes its position, and operates to send a supply of the fluid through the filter medium in a second direction which is opposite to the normal first direction of fluid flow.

REFERENCES:
patent: 830652 (1906-09-01), Durbrow
patent: 2296247 (1942-09-01), Green
patent: 2411986 (1946-12-01), Cowherd
patent: 2451073 (1948-10-01), Cowherd

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