The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 21, 2019
Filed:
Feb. 10, 2014
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Kiichi Tokunaga, Tokyo, JP;
Takeshi Yasunaga, Tokyo, JP;
MITSUBISHI HEAVY INDUSTRIES ENGINEERING, LTD., Kanagawa, JP;
Abstract
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 tankis supplied to reverse osmosis membrane modulevia clarified seawater supply passage. Permeate water pw obtained by an earlier stage element of the reverse osmosis membrane elementsof the reverse osmosis membrane moduleis sent to a subsequent process from permeate water sending passage, and permeate water pw obtained by the reverse osmosis membrane elementis circulated into the to-be-treated water tankvia permeate water circulation passage. The flow rate of the clarified seawater sw supplied to the reverse osmosis membrane moduleis controlled by variable flow rate high-pressure pumpprovided in the clarified seawater supply passage, and opening degree of flow regulating valveprovided in the permeate water circulation passageis controlled, whereby the circulation flow rate of the permeate water is controlled.