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    • 6. 发明公开
    • METHOD FOR OPERATING REVERSE OSMOSIS MEMBRANE DEVICE
    • VERFAHREN ZUM BETREIBEN EINER UMKEHROSMOSE-MEMBRANVORRICHTUNG
    • EP2959964A1
    • 2015-12-30
    • EP14754337.5
    • 2014-02-10
    • Mitsubishi Heavy Industries, Ltd.
    • TOKUNAGA, KiichiYASUNAGA, Takeshi
    • B01D61/12B01D61/58C02F1/44
    • C02F1/441B01D61/025B01D61/12B01D2311/10B01D2311/16B01D2311/246B01D2313/243C02F2103/08Y02A20/131
    • To enable energy-saving operation and stable supply of permeate water while water quality level of the permeate water is satisfied during operation, clarified seawater sw subjected to pretreatment and stored in to-be-treated water tank 12 is supplied to reverse osmosis membrane module 14 via clarified seawater supply passage 16. Permeate water pw obtained by an earlier stage element of the reverse osmosis membrane elements 36 of the reverse osmosis membrane module 14 is sent to a subsequent process from permeate water sending passage 46, and permeate water pw obtained by the reverse osmosis membrane element 36 is circulated into the to-be-treated water tank 12 via permeate water circulation passage 48. The flow rate of the clarified seawater sw supplied to the reverse osmosis membrane module 14 is controlled by variable flow rate high-pressure pump 22 provided in the clarified seawater supply passage 16, and opening degree of flow regulating valve 68 provided in the permeate water circulation passage 48 is controlled, whereby the circulation flow rate of the permeate water is controlled.
    • 为了在运行中满足渗透水的水质水平的同时进行节能运行和稳定的渗透水的供给,经过预处理的澄清的海水SW被储存在待处理水箱12中,被供给到反渗透膜组件14 通过澄清的海水供给通道16.通过反渗透膜组件14的反渗透膜元件36的较早级元件获得的渗透水pw被输送到从渗透水输送通道46进行的后续处理,并且由渗透水输送通道46获得的渗透水pw 反渗透膜元件36通过渗透水循环通道48循环到待处理水箱12中。提供给反渗透膜组件14的澄清海水SW的流量由可变流量高压泵 22设置在澄清的海水供应通道16中,以及设置在渗透水回路中的流量调节阀68的开度 控制通道48,从而控制渗透水的循环流量。