Method and apparatus for purifying liquids employing a particula

Details Method and apparatus for purifying liquids employing a particula Method and apparatus for purifying liquids employing a particula

1988-05-20

1990-05-08

Spear, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210295, 21032169, B01D 1300

Patent

active

049236091

ABSTRACT:
A method and apparatus of purifying contaminated liquids employing a particulate filter and a membrane in combination. The particulate filter and membrane are disposed in a unitary container with the membrane being located downstream of the particulate filter. During the process of purifying a contaminated liquid, the membrane causes a back pressure to be exerted on the particulate filter thereby providing substantially even flow of liquid through the particulate filter and minimizing problems associated with uneven flow such as channeling, piping, purging and tunneling. An improved method for cleaning the liquid purification apparatus is also disclosed. The cleaning method preferably employs a gas such as air for scouring the particulate filter and the membrane in a single operation.

REFERENCES:
patent: 3436260 (1969-04-01), Duff
patent: 3498909 (1970-03-01), Littman
patent: 3505215 (1970-04-01), Bray
patent: 3827976 (1974-08-01), Stana et al.
patent: 3836458 (1974-09-01), Wallis et al.
patent: 3912624 (1975-10-01), Jennings
patent: 4169789 (1979-10-01), Lerat
patent: 4198293 (1980-04-01), Ogawa et al.
patent: 4366063 (1982-12-01), O'Connor
patent: 4636307 (1987-01-01), Inoue et al.

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