B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
182/13
B01D 63/06 (2006.01) B01D 65/08 (2006.01)
Patent
CA 1102250
FLUID PURIFICATION SYSTEM ABSTRACT A fluid purification system for performing filtration of particles from a feed liquid by a tan- gential flow of the feed liquid over a membrane surface. In one embodiment, the purification system includes a filter cartridge contained within a filter housing having ports permitting ingress and egress of feed liquid and filtrate. The cartridge includes a filter element hav- ing a layered construction with a thin flow channel be- tween the layers. One layer of the filter element is formed of a sheet of impervious material defining one wall of the thin flow channel. Another layer of the filter element is spaced from the one layer and formed of a sheet of permeable membrane material and defines another wall of the thin flow channel. The spacing between the walls of the thin flow channel is maintained by a sheet of reticular material that provides turbu- lence in the thin flow channel to promote cross flow filtration. The filter element is formed into a pleated, cylindrical shape with a flow axis parallel to the pleats. The sheet of impervious material may be provided with a limited number of pores of sufficient dimension to permit intermittent entry of feed liquid along the thin flow channel to linearize the pressure along the flow channel without a proportionate decrease in mass flux. In another embodiment, the purification system is adapted for dialysis and/or diafiltration by modify- ing the cartridge and filter element to include another flow path for dialyzate. A second thin flow channel is formed by the addition of another layer of impervious sheet material, Both flow paths share a common membrane boundary.
318750
Hauk Dale I.
Tanny Gerald B.
Pall Corporation
Smart & Biggar
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