Membrane gas dehydrator

Details Membrane gas dehydrator Membrane gas dehydrator

1996-02-14

1997-02-25

Bennett, Henry A.

Gas separation: processes

Selective diffusion of gases

Selective diffusion of gases through substantially solid...

96 8, 34416, 34417, 34 73, 34 78, B01D 5322

Patent

active

056055641

ABSTRACT:
A capillary membrane gas dehydrator. A gaseous stream having water vapor therein flows into the tube side of the capillaries. Water vapor permeates through the fibers to the shell side. A portion of the dehydrated stream is used as a purge stream for the shell side of the dehydrator. A pressure valve meter combination is used in the bypass stream to ensure that the pressure of the purge stream is maintained at a constant level independent of any variation in the pressure of the feed stream. This ensures that if there is an increase in pressure in the feed stream there is no increase in the purge rate and no corresponding increase in purge losses.

REFERENCES:
patent: 4475293 (1984-10-01), Banerjee
patent: 4883023 (1989-11-01), Tsang et al.
patent: 4935143 (1990-06-01), Kopp et al.
patent: 5160514 (1993-11-01), Newbold et al.
patent: 5187972 (1993-02-01), DeFriez
patent: 5399188 (1995-03-01), Roberts

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