Backwash method and apparatus

Details Backwash method and apparatus Backwash method and apparatus

1982-05-03

1983-09-20

Hart, Charles N.

Liquid purification or separation

Processes

Separating

2103232, 21033301, 210411, B01D 2938

Patent

active

044054661

ABSTRACT:
The method and apparatus for filtering a liquid including a filter vessel divided into an upper filter compartment and a lower plenum compartment. An external vessel is positioned at or below the elevation of the tops of the filter element fittings in the plenum compartment. A pressurized gas is supplied to the upper portion of the external vessel forcing backwash liquid from the external vessel into the lower portion of the plenum compartment backwashing filter elements within the filter compartment.

REFERENCES:
patent: 1642673 (1927-09-01), Genter
patent: 1771928 (1930-07-01), Jung
patent: 2562699 (1951-07-01), Cooperson et al.
patent: 2710099 (1955-06-01), Kalinske
patent: 3280978 (1966-10-01), Scott
patent: 3402818 (1968-09-01), Sasaki
patent: 3438502 (1969-04-01), Schmidt, Jr. et al.
patent: 3666097 (1972-05-01), Ryan
patent: 3779386 (1973-12-01), Ryan
patent: 4089781 (1978-05-01), Asp

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