Cleaning of hollow fiber filters utilized in lumenal gas flow

Details Cleaning of hollow fiber filters utilized in lumenal gas flow Cleaning of hollow fiber filters utilized in lumenal gas flow

1987-06-03

1988-08-30

Sever, Frank

Liquid purification or separation

Processes

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

210794, B01D 1300, B01D 2938

Patent

active

047675390

ABSTRACT:
A method of cleaning a filter having a plurality of elastic, porous hollow fibers with lumens within a shell or housing and in which filtration is carried out by applying a liquid suspension feedstock to the outer surface of the fibers whereby a portion of feedstock passes through the walls of the fiber to be drawn from the fiber lumens as a filtrate or permeate, and a portion of the solids in the feedstock are retained on or in the pores of the fibers, with the non-retained solids being removed from the shell or housing with the remainder of the feedstock, said method entailing introducing a pressurized gas into the fiber lumens which passes through the walls of the fibers to dislodge the retained solids, the gas being applied at a pressure which is sufficient to overcome the effect of the surface tension of the continuous phase of the feedstock within the pores of the membrane.

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Sourirajan, "Reverse Osmosis and Synthetic Membranes", Nat. Res. Con. Canada; NRCC No. 15627; 1977; pp. 325-328.
"Membrane Filtration", by Thomas D. Brock, Science Tech., Inc., (1983), pp. 6, 48, 50, 306 and 307.
"Fifteen Years of Ultrafiltration . . . ", by A. Michaels, pp. 1-17, in Ultrafiltration Membranes and Applications, Edited by A. R. Cooper, (Am. Chem. Soc. Sym., Washington, Sep. 9-14, 1979, Plenum Press, N.Y., 1980.

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