Reverse osmosis treatment system for recovering energy generated both at brine and permeate sides during seawater desalination

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United States of America Patent

PATENT NO 10427101
APP PUB NO 20170173534A1
SERIAL NO

15385044

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Provided is a reverse osmosis treatment system capable of simultaneously and efficiently recovering energy generated both at brine and permeate sides. The system comprises a branched portion configured to divide second to-be-treated water into third and fourth to-be-treated water; a high-pressure pump configured to pressurize the third to-be-treated water thereby to feed fifth to-be-treated water having a higher pressure than the to-be-treated water before divided; a displacement type of first energy recovery device configured to exchange pressures between the fourth to-be-treated water and brine thus separated by a reverse osmosis treatment device, thereby to produce sixth to-be-treated water having a higher pressure than the fourth one; and a second energy recovery device configured to raise a pressure of the third to-be-treated water located at a downstream side of the branched portion with a pressure of first permeate thus separated by the reverse osmosis treatment device.

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Patent Owner(s)

  • HITACHI LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kitamura, Kotaro Tokyo, JP 18 27
Matsuura, Masayuki Tokyo, JP 10 247
Miyakawa, Hiroki Tokyo, JP 7 11
Okawa, Yusuke Tokyo, JP 15 31
Oshikiri, Takanori Tokyo, JP 4 3

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