Liquid purification or separation – Casing divided by membrane into sections having inlet – Each section having inlet
Patent
1989-05-17
1990-03-06
Sever, Frank
Liquid purification or separation
Casing divided by membrane into sections having inlet
Each section having inlet
21032178, 21032183, 21032187, B01D 1300, B01D 2700
Patent
active
049063723
ABSTRACT:
A reverse osmosis or ultrafiltration separation device for treating a liquid feed wherein a separation assembly is wound spirally about a central permeate-carrying tube. The assembly includes an elongated semipermeable membrane envelope which includes an interior permeate passageway and feed-passageway-providing sheet material spirally wound with said envelope to supply a liquid feed to be treated. A cylindrical housing of circular cross section having an inlet and a pair of outlets holds the spiral wound separation assembly which is tightly surrounded by a seamless, highly porous, rigid, tubular sleeve proportioned to be snugly received within the cylindrical housing. The sleeve has a predetermined thickness relative to the diameter of the housing chamber so that a desired amount of bypass flow of liquid occurs through the space generally occupied by the sleeve.
REFERENCES:
patent: 3928204 (1975-12-01), Thomas
patent: 4001198 (1977-01-01), Thomas
patent: 4036760 (1977-07-01), Bardonnet et al.
patent: 4049550 (1977-09-01), Obidniak
Desalination Systems Inc.
Sever Frank
LandOfFree
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