Membrane module for hyperfiltration or ultrafiltration of contai

Details Membrane module for hyperfiltration or ultrafiltration of contai Membrane module for hyperfiltration or ultrafiltration of contai

1988-09-09

1989-10-10

Sever, Frank

Liquid purification or separation

Processes

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

210650, 21032174, 21032183, B01D 1300

Patent

active

048729906

ABSTRACT:
A membrane module for hyperfiltration or ultra filtration of liquid flows comprises a membrane envelope (1) spirally wound around a tube (4) provided with openings and the membrane layers of which are alternately kept at a distance from each other by retentate spacers and permeate spacers (2), which retentate spacers comprise relatively rigid rods or wires (3) extending parallel to the center line of the module. In order to obtain a very constant and defined geometry of the retentate flow channels and a favorable ratio between membrane surface and module volume, the width dimension of the rods measured perpendicular to the membrane layers is 0.5 to 2.5 mm and the distance between the rods is 4 to 12 times said width dimension. Said width dimension of the rods measured perpendicular to the membrane layers should be at least three times the diameter of the largest particles in the liquid flow to be filtered.

REFERENCES:
patent: 3893920 (1975-07-01), Hubbard et al.
patent: 3984319 (1976-10-01), Hubbard et al.
patent: 4301013 (1981-11-01), Setti et al.
patent: 4746430 (1988-05-01), Cooley
patent: 4756835 (1988-07-01), Wilson
patent: 4781830 (1988-11-01), Olsen

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