Method and apparatus for cleaning filters contaminated by polyme

Details Method and apparatus for cleaning filters contaminated by polyme Method and apparatus for cleaning filters contaminated by polyme

1997-02-12

1999-08-31

Popovics, Robert J.

Liquid purification or separation

Processes

Separating

210798, 210409, 210411, 210177, 210184, 21033301, B01D 2962, B01D 3344

Patent

active

059450061

ABSTRACT:
A method and an apparatus for cleaning filters contaminated by hot-melting resins and polymers in situ, without removing the filtering elements. The method comprises a preliminary step, during which the circulation of the product to be filtered through the filter to be cleaned is interrupted, and a draining step, during which a pressurized draining fluid is passed through the filter in order to empty the filter of the residual product. A filter cleaning step is then performed during which a cleaning fluid, constituted at least partially by superheated steam, is passed through the filter. The fluids used to clean the filter are then subjected to treatments to eliminate pollutants.

REFERENCES:
patent: 4238428 (1980-12-01), Susumu et al.
patent: 4963271 (1990-10-01), Wilfried et al.
patent: 5200077 (1993-04-01), Mc Neice et al.
patent: 5211845 (1993-05-01), Noritsugu
patent: 5487836 (1996-01-01), Mason et al.
patent: 5516426 (1996-05-01), Hull et al.

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