Apparatus and method

Details Apparatus and method Apparatus and method

1979-11-13

1981-05-26

Cuchlinski, Jr., William A.

Liquid purification or separation

Processes

Separating

210503, B01D 3702

Patent

active

042697077

ABSTRACT:
A filter element having a perforated tubular core and a plurality of layers of strand material wound about the tubular core. The outermost layer has the ability to retain particles smaller than those retained by the innermost layer. The size range of particles retained by the outermost layer is from one to twenty-five microns and the size range of particles retained by the innermost layer is from twenty-five to one hundred microns.
According to the method of invention, the filter element is used to purify liquids through the steps of precoating, delivering liquid through the filter, periodically backwashing the filter, and precoating the filter again.

REFERENCES:
patent: 1751000 (1930-03-01), Goldman
patent: 2150309 (1939-03-01), Atwell
patent: 2555201 (1951-05-01), Nordell
patent: 3065856 (1962-11-01), Goldman
patent: 3105289 (1963-10-01), Jardin
patent: 3255889 (1966-06-01), Goldman et al.
patent: 3279608 (1966-10-01), Soriente et al.
patent: 3319793 (1967-05-01), Miller et al.
patent: 3648846 (1972-03-01), Sicard
patent: 3680709 (1972-08-01), Snow
patent: 3779386 (1973-12-01), Ryan
patent: 3904798 (1975-09-01), Vogt et al.

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