DESALTING PERFORMANCE RECOVERY METHOD OF REVERSE OSMOSIS MEMBRANE

To provide a desalting performance recovery method of a reverse osmosis membrane which can shorten plant operation stop time, and can reduce a used amount of chemicals.SOLUTION: A desalting performance recovery method of a reverse osmosis membrane includes: a cleaning step of circulating a cleaning...

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Bibliographische Detailangaben
Hauptverfasser:	HORI TAKAYOSHI, ITO YOSHIAKI, KATSUNISHI SUMIHISA, MASUI TAKAHIRO, YOKOGAWA SHO, KAMITO RYO, UEDA ATSUNARI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING
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Beschreibung
Zusammenfassung:	To provide a desalting performance recovery method of a reverse osmosis membrane which can shorten plant operation stop time, and can reduce a used amount of chemicals.SOLUTION: A desalting performance recovery method of a reverse osmosis membrane includes: a cleaning step of circulating a cleaning liquid, and bringing the cleaning liquid into contact with a revere osmosis membrane; and a recovery step of adding a recovery agent to the cleaning liquid during circulation, and bringing the recovery agent into contact with the reverse osmosis membrane.SELECTED DRAWING: Figure 1 【課題】プラントの運転停止時間を短くでき、薬品の使用量も少なくできる、逆浸透膜の脱塩性能回復方法を提供する。【解決手段】逆浸透膜の脱塩性能回復方法は、洗浄液を循環させて逆浸透膜に洗浄液を接触させる洗浄工程と、循環中の前記洗浄液に回復剤を添加し、前記回復剤を前記逆浸透膜に接触させる回復工程と、を備える。【選択図】図１