MEMBRANE SEPARATION SYSTEM AND METHOD FOR OPERATING MEMBRANE SEPARATION SYSTEM

원문 (중국어)

A membrane separation system includes a membrane separation unit, a condensation unit, and a decompression unit. The condensation unit is disposed between the membrane separation unit and the decompression unit. The membrane separation unit has a pervaporation membrane. The pervaporation membrane separates a feed liquid containing a volatile organic compound and a gas into a permeated fluid and a non-permeated fluid. The condensation unit condenses the organic compound contained in the permeated fluid. The decompression unit decompresses an inside of a permeation space of the membrane separation unit. An operating condition of the decompression unit is controlled in such a manner that a pressure in the permeation space of the membrane separation unit has, during operation, a value larger than a minimum value of a pressure that the inside of the permeation space of the membrane separation unit can reach during rated operation of the decompression unit.