Title:
WATER PRODUCTION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2017/170013
Kind Code:
A1
Abstract:
A water production system for producing fresh water from seawater and low-osmotic-pressure water having a lower osmotic pressure than seawater, said system comprising: a first reverse osmosis membrane module that has a first reverse osmosis membrane, separates freshwater from seawater via the first reverse osmosis membrane, and discharges concentrated saltwater, i.e. the concentrated seawater; a first high-pressure pump that supplies seawater to the first reverse osmosis membrane module; a second reverse osmosis membrane module that has a second reverse osmosis membrane, and separates fresh water from low-osmotic-pressure water via the second reverse osmosis membrane; a second high-pressure pump that supplies low-osmotic-pressure water to the second reverse osmosis membrane module; a forward osmosis membrane module that has a forward osmosis membrane, dilutes the concentrated saltwater using water supplied from among the low-osmotic-pressure water via the forward osmosis membrane, and discharges diluted saltwater, i.e. the concentrated saltwater that has been diluted; a low-pressure pump that supplies low-osmotic-pressure water to the forward osmosis membrane module and the second high-pressure pump; and an energy recovery device that recovers energy from the diluted saltwater, and supplies the recovered energy to the second high-pressure pump.
Inventors:
FUJIWARA NOBUYA (JP)
KUMANO ATSUO (JP)
KUMANO ATSUO (JP)
Application Number:
PCT/JP2017/011338
Publication Date:
October 05, 2017
Filing Date:
March 22, 2017
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
C02F1/44; B01D61/00; B01D61/02; B01D61/06; B01D61/58; F03G7/00
Foreign References:
| JP2014200708A | 2014-10-27 | |||
| US20130160435A1 | 2013-06-27 | |||
| US20120118826A1 | 2012-05-17 | |||
| CN104163470A | 2014-11-26 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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