Process and apparatus for cleaning filter elements, especially f

Details Process and apparatus for cleaning filter elements, especially f Process and apparatus for cleaning filter elements, especially f

1985-03-04

1986-06-03

Castel, Benoit

Liquid purification or separation

Processes

Separating

210771, 210798, 210808, 210108, 2103232, 21033301, 210186, B01D 2932, B01D 2938

Patent

active

045928479

ABSTRACT:
The filtering vessel (1) holding cartridge filter (16) is connected to a receiver (3) through a quick-opening valve. There is generated an underpressure in (3) for separating the filter cake built up on the cartridges, said underpressure being lower than the evaporation pressure of the liquid contained in the filter cake. Accordingly, there is built up an overpressure in the filtering vessel (1). An immediate opening of the valve (2) and a proportionate temperature in system (1) and (2) results in a spontaneous bursting off of the filter cake from the cartridge surface, which bursting off, in consequence of the pressure compensation between (1) and (3) still will be increased by means of the liquid contained in the filter cake evaporating in the course of a flash procedure. The relatively dry filter cake is collected in the receiver (3). The next filtration process can be started after closing valve (2).

REFERENCES:
patent: 2779477 (1957-01-01), Swensen
patent: 2954872 (1960-10-01), Liddell
patent: 3666097 (1972-05-01), Ryan
patent: 3891551 (1975-06-01), Tiedemann
patent: 4217700 (1980-08-01), Muller
patent: 4264445 (1981-04-01), Lumikko et al.
patent: 4439327 (1984-03-01), Muller
patent: 4443346 (1984-04-01), Muller

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