公开(公告)号：US20180297866A1

公开(公告)日：2018-10-18

申请号：US16015576

申请日：2018-06-22

Applicant: Hitachi, Ltd.

Inventor： Shinichi YOSHIKAWA ,  Katsuhiro MIBU ,  Yukiko ICHIGE ,  Katsuhiko SHIMIZU ,  Hideaki KUROKAWA

IPC: C02F1/44 ,  B01D61/58 ,  B01D61/02 ,  C02F1/00 ,  C02F3/12 ,  C02F103/08 ,  B01D61/14 ,  B01D61/06

Abstract: Provided are a water treatment system and a water treatment method capable of downsizing a facility and inexpensively producing freshwater. A water treatment system includes: a first reverse osmosis treatment device for separating wastewater into desalinated permeate water and concentrated wastewater; a mixing unit for mixing the separated concentrated wastewater and intake seawater; a second reverse osmosis treatment device for separating mixed water obtained by mixing the concentrated wastewater and the seawater into desalinated permeate water and concentrated mixed water; and a return pipe for returning a portion of the separated concentrated mixed water to the mixing unit. The water treatment method includes the following steps: mixing intake seawater with wastewater; separating the mixed water into permeate water and concentrated mixed water; re-mixing a portion of the concentrated mixed water with the mixed water; and producing freshwater by re-separating the re-mixed water into permeate water and concentrated mixed water.

公开(公告)号：US20170001883A1

公开(公告)日：2017-01-05

申请号：US15181472

申请日：2016-06-14

Applicant: Hitachi, Ltd.

Inventor： Shinichi YOSHIKAWA ,  Katsuhiro MIBU ,  Yukiko ICHIGE ,  Katsuhiko SHIMIZU ,  Hideaki KUROKAWA

IPC: C02F1/44 ,  B01D61/08 ,  B01D61/02

CPC classification number: C02F1/441 ,  B01D61/022 ,  B01D61/06 ,  B01D61/14 ,  B01D61/58 ,  B01D2311/04 ,  B01D2311/06 ,  B01D2311/08 ,  B01D2311/14 ,  B01D2311/25 ,  B01D2317/022 ,  C02F1/001 ,  C02F1/004 ,  C02F1/283 ,  C02F1/32 ,  C02F1/42 ,  C02F1/444 ,  C02F1/52 ,  C02F1/78 ,  C02F3/1273 ,  C02F2103/08 ,  C02F2209/001 ,  C02F2209/05 ,  C02F2209/40 ,  C02F2301/046 ,  C02F2301/08 ,  C02F2303/10 ,  C02F2303/16 ,  Y02A20/131 ,  Y02W10/15 ,  Y02W10/30

Abstract: Provided are a water treatment system and a water treatment method capable of downsizing a facility and inexpensively producing freshwater. A water treatment system includes: a first reverse osmosis treatment device for separating wastewater into desalinated permeate water and concentrated wastewater; a mixing unit for mixing the separated concentrated wastewater and intake seawater; a second reverse osmosis treatment device for separating mixed water obtained by mixing the concentrated wastewater and the seawater into desalinated permeate water and concentrated mixed water; and a return pipe for returning a portion of the separated concentrated mixed water to the mixing unit. The water treatment method includes the following steps: mixing intake seawater with wastewater; separating the mixed water into permeate water and concentrated mixed water; re-mixing a portion of the concentrated mixed water with the mixed water; and producing freshwater by re-separating the re-mixed water into permeate water and concentrated mixed water.

Abstract translation: 提供能够使设施小型化且廉价生产淡水的水处理系统和水处理方法。 水处理系统包括：将废水分离为脱盐渗透水和浓缩废水的第一反渗透处理装置; 用于混合分离的浓缩废水和进水海水的混合单元; 第二反渗透处理装置，用于将通过将浓缩废水和海水混合成脱盐的渗透水和浓缩混合水得到的混合水; 以及用于将分离的浓缩混合水的一部分返回到混合单元的返回管。 水处理方法包括以下步骤：将进水中的海水与废水混合; 将混合水分离成渗透水和浓缩混合水; 将一部分浓缩的混合水与混合水重新混合; 并通过将再混合水重新分离成渗透水和浓缩混合水来生产淡水。