公开(公告)号：US20230285903A1

公开(公告)日：2023-09-14

申请号：US18013902

申请日：2021-09-02

Applicant: KURITA WATER INDUSTRIES LTD.

Inventor： Kazuki ISHII ,  Mamoru IWASAKI ,  Itaru ITO

IPC: B01D65/02 ,  B01D61/02 ,  B01D65/08 ,  C02F1/44

CPC classification number: B01D65/02 ,  B01D61/026 ,  B01D65/08 ,  C02F1/441 ,  B01D2317/022 ,  B01D2319/04 ,  B01D2321/02 ,  B01D2321/10 ,  B01D2321/12 ,  C02F2303/16 ,  C02F2303/22 ,  C02F2301/08

Abstract: A method for operating a desalting device that has a first desalting device and a second desalting device, said method comprising: a normal operation step for supplying to-be-treated water to the first desalting device so as to separate the to-be-treated water into first concentrated water and first desalted water, and supplying the first concentrated water to the second desalting device so as to separate the first concentrated water into second concentrated water and second desalted water; and a recovery operation step for supplying the to-be-treated water to the first desalting device so as to separate the to-be-treated water into the first concentrated water and first permeate water, and passing dilute water having a lower concentration than the first concentrated water through the second desalting device so as to recover desalting performance of the second desalting device.

公开(公告)号：US20180079663A1

公开(公告)日：2018-03-22

申请号：US15562750

申请日：2016-03-30

Applicant: KURITA WATER INDUSTRIES LTD. ,  HITACHI-GE NUCLEAR ENERGY, LTD.

Inventor： Shingo MIYAMOTO ,  Mami HIROSE ,  Mamoru IWASAKI ,  Hideyuki KOMORI ,  Motohiro AIZAWA ,  Nobuyuki OTA ,  Takako SUMIYA ,  Kazushige ISHIDA

IPC: C02F1/469 ,  B01D61/48 ,  G21F9/12

CPC classification number: C02F1/4695 ,  B01D61/48 ,  C02F1/469 ,  C02F2101/203 ,  C25C1/08 ,  C25C7/04 ,  G21F9/06 ,  G21F9/12

Abstract: A method in which an anode chamber and a cathode chamber are separated by a cation exchange membrane, an acid solution containing metal ions is introduced into the anode chamber, a cathode solution is introduced into the cathode chamber, and a current is applied across the anode and the cathode, whereby the metal ions in the solution in the anode chamber pass through the cation exchange membrane, move into the cathode solution, and precipitate as metal onto the cathode, wherein there are minimal instances where electrodeposition is impossible or the electrodeposition rate decreases. Pre-adding a salt of the acid contained in the acid solution makes it possible to suppress concentration-diffusion of the acid from the acid solution. Adding a salt of the acid into the cathode chamber makes it possible to reduce the impressed voltage, reduce the amount of hydrogen generated on the cathode, and reduce the amount of power.

公开(公告)号：US20160247589A1

公开(公告)日：2016-08-25

申请号：US15030781

申请日：2014-10-20

Applicant: KURITA WATER INDUSTRIES LTD. ,  HITACHI-GE NUCLEAR ENERGY, LTD.

Inventor： Shingo MIYAMOTO ,  Mamoru IWASAKI ,  Mami HIROSE ,  Motohiro AIZAWA ,  Nobuyuki OTA ,  Takako SUMIYA ,  Kazushige ISHIDA

IPC: G21F9/12 ,  G21F9/30 ,  C25C1/06

CPC classification number: G21F9/12 ,  C25C1/06 ,  G21F9/00 ,  G21F9/001 ,  G21F9/06 ,  G21F9/30 ,  G21Y2002/60 ,  G21Y2004/601

Abstract: In an electrodeposition treatment of an iron-group metal ion-containing liquid, without being influenced by the properties of the iron-group metal ion-containing liquid, iron-group metal ions are efficiently removed from the liquid by precipitation. An anode chamber 2A provided with an anode 2 and a cathode chamber 3A provided with a cathode 3 are separated from each other by a cation exchange membrane 5, an iron-group metal ion-containing liquid is charged into the anode chamber 2A, a cathode liquid is charged into the cathode chamber 3A, and by applying the voltage between the anode 2 and the cathode 3, iron-group metal ions in the liquid in the anode chamber 2A are moved into the liquid in the cathode chamber 3A through the cation exchange membrane 5, so that an iron-group metal is precipitated on the cathode 3.

Abstract translation: 在含铁族金属离子的液体的电沉积处理中，不受铁族金属离子的液体的性质的影响，通过析出有效地除去铁族金属离子。 设置有阳极2和设置有阴极3的阴极室3A的阳极室2A通过阳离子交换膜5彼此分离，将含铁族金属离子的液体装入阳极室2A，阴极 液体被充入阴极室3A中，并且通过在阳极2和阴极3之间施加电压，阳极室2A中的液体中的铁族金属离子通过阳离子交换移动到阴极室3A中的液体中 膜5，使得铁族金属在阴极3上析出。