DEHYDRATION SYSTEM AND DEHYDRATION METHOD APPLICABLE TO LOW-Si ZEOLITE MEMBRANES IN HIGH-WATER-CONTENT SYSTEMS

WIPO Patent Application WO/2019/189358

A1

Provided is a dehydration system using a zeolite membrane that has an LTA crystal structure, said system being capable of extending membrane life in high-water-content systems. This dehydration system 10 removes moisture from a water-containing fluid to be separated and comprises: a membrane module 17 having a zeolite membrane having an LTA or FAU crystal structure; an inlet-side passage 15 whereby a fluid flows into an inlet 16 for the membrane module 17; an outlet-side passage 19 connected to an outlet 18 from which concentrated fluid is discharged; a concentrated fluid tank 20 connected to the outlet-side passage 19; and a recirculation passage 21 connected to the inlet-side passage 15, from the concentrated fluid tank 20. The dehydration system is characterized by: recirculating a prescribed amount of concentrated fluid from the concentrated fluid tank 20, along the recirculation passage 21 to the membrane module 17; and adjusting the prescribed amount such that the total moisture content of the water-containing fluid to be separated that flows into the inlet 16 of the membrane module 17 and the concentrated fluid recirculated along the recirculation passage 21 is no more than a prescribed value.

OKADA MASASHI (JP)
YANO TAKESHI (JP)
ASARI YOSHIHIRO (JP)
SHINOYA KENTARO (JP)

PCT/JP2019/013187

October 03, 2019

March 27, 2019

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HITACHI SHIPBUILDING ENG CO (JP)

B01D71/02; B01D61/36; C01B39/46

WO2016067677A1

2016-05-06

JP2013240795A	2013-12-05
JP2017165671A	2017-09-21

MATSUMURA Naoto et al. (JP)

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