Two stage membrane dryer

Details Two stage membrane dryer Two stage membrane dryer

1992-02-13

1993-04-27

Spitzer, Robert

Gas separation

Means within gas stream for conducting concentrate to collector

55 68, 55158, B01D 5322

Patent

active

052058425

ABSTRACT:
This invention uses a first or roughing stage to remove the bulk of moisture and a second or polishing stage to complete the drying. The first stage can use a relatively small membrane area and a relatively low quality purge gas whereas the second stage can use a large membrane area and high quality purge gas, such as some product back purge. The arrangement provides efficient usage of available high quality purge gas, such as product, while minimizing product contamination. This two stage purging arrangement is especially attractive for those processes or systems where multigrade purge gases are available.

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