Counter current dual-flow spiral wound dual-pipe membrane separation
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United States of America Patent
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Jul 23, 1991
Issued Date -
N/A
app pub date -
Jun 7, 1990
filing date -
Jan 29, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to an improved design for a spiral wound membrane separation device. The improved module has one feed pipe separated into compartments which are connected axially to a porous spacer surrounded by a membrane envelope. A separate permeate pipe is immediately adjacent and generally in a parallel configuration to the fluid feed pipe and is in fluid communication with a different porous spacer sheet. When the porous feed membrane and pipe and spacer and permeate pipe are combined using appropriate complementary shaped spaced filling means, a spiral wound membrane separation device is obtained having two centrally located pipes. In one aspect, the membrane separation module further includes means for the addition of a countercurrent or cocurrent sweep fluid (gas) the permeate.
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