Support with rotary symmetric openings for filter aid, method an

Details Support with rotary symmetric openings for filter aid, method an Support with rotary symmetric openings for filter aid, method an

1976-12-16

1981-09-08

Granger, Theodore A.

Liquid purification or separation

Processes

Separating

210498, 21049701, B01D 3702

Patent

active

042883300

ABSTRACT:
Apparatus and process settling layer filtration in which the liquid to be filtered is passed through a layer of settling layer particles settled directly upon a self-supporting support member, the support member is a plate or tube, e.g. candle filter tube, perforated by a multitudinous array of holes of circular cross-sectional shape having a diameter at their smallest point in the range of 50-250 microns, and larger than the largest dimension of the larger particles, with a density of 20-400 opening per sq. cm. of member surface area whereby the layer particles form over such circular opening dome-shaped arches exhibiting increased strength and stability during actual filtration. An effective technique for producing such members by means of laser beam drilling is disclosed.

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