Two stage membrane dryer

Details Two stage membrane dryer Two stage membrane dryer

B - Operations, Transporting

01

D

B01D 53/26 (2006.01) B01D 53/22 (2006.01) B01D 63/00 (2006.01)

Patent

CA 2089411

- 20 - TWO STAGE MEMBRANE DRYER Abstract of the Disclosure 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. D-16765

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