Filter

Details Filter Filter

1981-08-03

1986-08-05

Lander, Ferris H.

Liquid purification or separation

Plural distinct separators

Filters

B01D 2300

Patent

active

046042016

ABSTRACT:
A filter is provided with a number of elongated filter elements disposed in a pressure vessel. Each element has a filter web extending about the length of the element and fastened at the top and the bottom. Rigid support means are provided inside the filter element in order to support the web. They extend about the length of the element and preferably extend over a part only of the circumference of the element so as to permit the web to perform a limited movement outwards and inwards in radial direction. During the operation the web is pressed against the support means by the inflowing liquid permitting a filter cake to build up at its outside while upon a backwash operation the web moves outwardly away from said support means thus loosening the filter cake. Inlet and outlet means are provided on the pressure vessel. This permits a build-up and easy removal of the filter cake without the use of a bellows type filter web.

REFERENCES:
patent: 1734325 (1929-11-01), Cannon
patent: 2657808 (1953-11-01), Mankin

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