Membrane module

Details Membrane module Membrane module

B - Operations, Transporting

01

D

B01D 61/36 (2006.01) B01D 63/10 (2006.01)

Patent

CA 2090855

2090855 9204107 PCTABS00011 A spiral-wound pervaporation module, incorporating membrane envelopes (2), within and between which are channels through which the feed and permeate streams flow. The feed and permeate channels are created by feed spacers (3) and permeate spacers (4). The module is unconventional in that the permeate spacer is tailored for optimum permeate flow throughput, based on the discovery that the total permeate flow throughput passes through a maximum as the resistance to vapor transport of the permeate spacer material is progressively decreased. The resistance to vapor transport along the permeate channel is kept below a value at which it has a significant adverse effect on the membrane flux and the membrane separation properties, yet at the same time the total module throughput is within an optimum range. The increase in throughput per unit membrane area obtained more than compensates for the loss in membrane area brought about by use of a thicker permeate spacer.

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