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公开(公告)号：US20240336497A1
公开(公告)日：2024-10-10
申请号：US18580588
申请日：2022-03-17
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Rena TABEI , Yasuharu MINATO
CPC classification number: C02F1/32 , C02F1/265 , C02F1/4695 , C02F1/72
Abstract: The present invention provides a method for operating a pure-water production system, which includes an ultraviolet oxidation device and an electrical de-ionization device and channels water to these devices in this order from an upstream side. The method includes: setting hydrogen peroxide concentrations of concentrated water in a concentration chamber and electrode water in an electrode chamber of the electrical de-ionization device less than a hydrogen peroxide concentration of treated water that permeates through a desalination chamber of the electrical de-ionization device.
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公开(公告)号：US12110242B2
公开(公告)日：2024-10-08
申请号：US17603586
申请日：2020-03-13
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Ayako Sakamoto , Shigeru Sato , Kazuya Watanabe , Shihoko Sekiguchi
IPC: C02F11/147 , B01D21/01 , C02F1/56 , C08F220/34 , C08F220/38
CPC classification number: C02F11/147 , B01D21/01 , C02F1/56 , C08F220/34 , C08F220/385 , C08F2800/10
Abstract: Provided are: a sludge dehydrating agent which can exert a steady dehydrating effect on various types of sludge and has excellent dehydration performance; and a sludge dehydration method using the sludge dehydrating agent. The sludge dehydrating agent of the present invention with a polymer which has a constituent unit derived from a cationic monomer, wherein a value k determined from an intrinsic viscosity [η] 1 [dL/g] of a 1-mol/L aqueous sodium nitrate solution of the polymer at 30° C. and an intrinsic viscosity [η] 0.01 [dL/g] of a 0.01-mol/L aqueous sodium nitrate solution of the polymer at 30° C. in accordance with formula (I) is 0.8 to 2.2 exclusive
k=([η]0.01−[η]1)/9 (I).-
公开(公告)号：US20240250362A1
公开(公告)日：2024-07-25
申请号：US18283337
申请日：2022-03-09
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Minoru YAGI , Mitsuru NOZUE , Jun KANEKO
IPC: H01M50/227 , H01G11/56 , H01G11/78 , H01M10/0525 , H01M50/207 , H01M50/383
CPC classification number: H01M50/227 , H01G11/56 , H01G11/78 , H01M10/0525 , H01M50/207 , H01M50/383
Abstract: The power storage device structure according to the present invention includes a power storage device and a casing that encloses the power storage device with a gap therebetween, and has a structure in which a molded body containing an acrylic resin or a molded body containing a copolymer of a monomer used for polymerization of an acrylic resin and another monomer is placed in the gap between the power storage device and the casing. The molded body is preferably in the form of a film, sheet, or plate. With such a power storage device structure, it is possible to reduce the risk of ignition in the event of an abnormality such as damage to a power storage device, particularly to a power storage device stack in which multiple power storage devices are stacked, or overcharge.
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公开(公告)号：US20240182330A1
公开(公告)日：2024-06-06
申请号：US18554019
申请日：2022-03-17
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Yasuharu MINATO , Rena TABEI
IPC: C02F1/469 , B01D61/48 , B01D61/54 , C02F1/00 , C02F103/04
CPC classification number: C02F1/4695 , B01D61/485 , B01D61/54 , C02F1/008 , B01D2317/06 , C02F2103/04 , C02F2201/005 , C02F2209/40 , C02F2301/08
Abstract: Provided are an electrodeionization system containing multiple electrodeionization devices installed in parallel and a control method for the system. The system contains a regulator varying a flow rate of supply water to the electrodeionization devices; an adjustor adjusting, for each electrodeionization device, a flow rate of concentrated water discharged from each electrodeionization device; and a maintainer maintaining the flow rate of the concentrated water at a certain level or higher. The maintainer is installed only in a main flow path where multiple sub-flow paths are integrated and a main path where multiple sub-paths are integrated. Desalted water produced in each electrodeionization device flows through each sub-flow path while concentrated water discharged from each electrodeionization device flows through each sub-path. The electrodeionization system reduces the production cost while suppressing the occurrence of scale due to a decrease in the flow rate of supply water to each electrodeionization device.
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公开(公告)号：US20240150206A1
公开(公告)日：2024-05-09
申请号：US18279917
申请日：2022-03-09
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Yuuichi OGAWA
Abstract: Functional aqueous solution supply apparatus (1) has a replenishment water production unit (3) that is supplied with ultrapure water (W) from a pipe conduit (2) and produces functional aqueous solution as washing water (W1), a storage tank (5) that is supplied/replenished with the produced washing water (W1) via a pipe (4), and a circulation pipe conduit (7) that supplies the washing water (W1) from the storage tank (5) to single-wafer type washers (6A, 6B, 6C, and 6D) and returns unused washing water (W1) to the storage tank (5). The circulation pipe conduit (7) is branched into supply pipes (7A, 7B, 7C, and 7D) and is further connected to return pipes (8A, 8B, 8C, and 8D) that communicate into the circulation pipe conduit (7) from the washers (6A, 6B, . . . ), respectively. The operation plan of the washers (6A, 6B, . . . ) is preliminarily transmitted to a control means (9), and this control means (9) can control the replenishment water production unit (3). Such a functional aqueous solution supply apparatus can supply the functional aqueous solution as the washing water to use points such as washing apparatuses for electronic components/electronic members, etc.
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Patent Agency Ranking
66.发明公开公开(公告)号：US20240053205A1
公开(公告)日：2024-02-15
申请号：US18019240
申请日：2021-07-16
Applicant: KURITA WATER INDUSTRIES LTD. , Hitachi, Ltd.
Inventor： Takashi KIKKAWA , Naoki IKEGAWA , Takuji KURINO , Koh TAKANOSE , Daisuke TAKA , Emi KAIYA
CPC classification number: G01J5/485 , B65G3/02 , G01J2005/0077
Abstract: The invention provides a management system of coal and/or steelmaking dust being managed outdoors. The management system includes an imaging unit, a threshold information acquiring unit, and a determining unit. The imaging unit is configured to perform imaging of heat distribution image information indicating a heat distribution image of a surface layer of a pile of the coal and/or steelmaking dust from a position where imaging of an entire surface layer of the pile can be performed. The threshold information acquiring unit is configured to acquire threshold information indicating a threshold of a temperature of the surface layer of the pile. The determining unit is configured to determine heat generation of the pile based on the heat distribution image information and the threshold information.
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公开(公告)号：US20240025785A1
公开(公告)日：2024-01-25
申请号：US18026787
申请日：2021-09-22
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Nobuko GAN
CPC classification number: C02F9/00 , C02F1/008 , C02F2103/04
Abstract: A production device for pH/redox potential-adjusted water (1) of the present invention includes a platinum group metal-supporting resin column (3) that is provided in a supply line (2) of ultrapure water (W) and a pH adjuster tank (4) and a redox potential adjuster tank (5) that are provided downstream the platinum group metal-supporting resin column (3). A membrane-type degassing device (6) is provided downstream them, and a gas-dissolving membrane (7) is disposed downstream the membrane-type degassing device (6). A cleaning water quality monitoring mechanism including a pH meter, an ORP meter, and an inert gas concentration measuring means is provided downstream the gas-dissolving membrane (7) of the supply line (2). The cleaning water quality monitoring mechanism is connected to a control means (not illustrated). The control means is capable of controlling a pump (4B) of the pH adjuster tank (4), a pump (5B) of the redox potential adjuster tank (5), and the gas-dissolving membrane (7) based on the measurement values of the cleaning water quality monitoring mechanism. With such a configuration, the present invention can suppress dissolution of metals to a minimum level in a rinsing step for the surfaces of wafers on which chromium group elements are exposed.
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公开(公告)号：US20240025772A1
公开(公告)日：2024-01-25
申请号：US18266259
申请日：2021-12-24
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Yuta OHTSUKA , Kunihiro HAYAKAWA , Gou NAKAGAWA
CPC classification number: C02F1/441 , C02F1/76 , B01D65/08 , C02F2303/20 , B01D2321/168
Abstract: The purpose of the present invention is to provide a technique whereby it becomes possible to operate for a longer period of time in an aqueous system equipped with a membrane separation apparatus. The present invention can provide a membrane separation method, the method comprising containing a combined-chlorine-based oxidizing agent to water of interest, and allowing the water of interest which contains the combined-chlorine-based oxidizing agent to pass through a membrane separation apparatus, in which the water of interest which contains the combined-chlorine-based oxidizing agent has a Free 300-second value of 0.036 mg/L-Cl2 or more wherein the Free 300-second value is a result of the measurement of a chlorine concentration after 300 seconds using a free chlorine measurement reagent.
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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
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.
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公开(公告)号：US20230227342A1
公开(公告)日：2023-07-20
申请号：US17928929
申请日：2021-05-18
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Keijirou TADA , Muneaki MATSUDA
Abstract: The water treatment apparatus of the present invention comprises a flocculation part into which water to be treated is introduced, at least two flocculant adding devices installed so that different flocculants can be added to the flocculation part, one or two or more water quality measurement devices for measuring the quality of the water to be treated, and a controlling part for issuing, on the basis of the measurement result from the water quality measurement device(s), a command relating to whether addition of the flocculants to the corresponding flocculant adding device is required or not and to the added amounts of the flocculants, wherein at least one of the flocculant adding devices is an auxiliary flocculant adding device.
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