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公开(公告)号：US20190336914A1
公开(公告)日：2019-11-07
申请号：US16424121
申请日：2019-05-28
Applicant: HITACHI, LTD.
Inventor： Hiroki MIYAKAWA , Kotaro KITAMURA , Masayuki MATSUURA , Takanori OSHIKIRI , Yusuke OKAWA
Abstract: 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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2.发明公开公开(公告)号：US20240317609A1
公开(公告)日：2024-09-26
申请号：US18269713
申请日：2022-02-04
Applicant: Hitachi, Ltd.
Inventor： Jun TANAKA , Yasuko KOBAYASHI , Takuya KAMBAYASHI , Daisuke YAGI , Makiko UDAGAWA , Kotaro KITAMURA , Hiroki MIYAKAWA
IPC: C02F1/00 , C02F11/147
CPC classification number: C02F1/008 , C02F11/147 , C02F2209/006 , C02F2209/008 , C02F2209/02 , C02F2209/44
Abstract: A sludge treatment facility operation assistance navigation system acquires an operating flock state that is a flocculation flock state during operation of a sludge treatment facility, acquires an operating sludge water content that is a water content of dehydrated sludge during operation of the sludge treatment facility, selects or generates facility operation contents of a flocculation tank and a sludge dehydrator based on the operating flock state, the operating sludge water content, a desired flocculation flock state, and a desired sludge water content, and displays the facility operation contents on a display device.
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3.发明公开公开(公告)号：US20240102925A1
公开(公告)日：2024-03-28
申请号：US18274583
申请日：2021-11-30
Applicant: Hitachi, Ltd.
Inventor： Yasuko KOBAYASHI , Jun TANAKA , Takuya KAMBAYASHI , Yusuke KAGA , Shunsuke KONO , Kotaro KITAMURA , Makiko UDAGAWA , Hiroki MIYAKAWA
IPC: G01N21/3554 , C02F1/00 , C02F11/12
CPC classification number: G01N21/3554 , C02F1/008 , C02F11/12 , C02F2209/006 , G01N2201/12753
Abstract: A moisture content measurement method that calculates moisture content of dehydrated sludge using a calibration curve for calculating the moisture content of the dehydrated sludge, the calibration curve being obtained by performing multivariate regression analysis after first-order differential processing or an offset correction is performed on absorbance for reflected light or reflectance for infrared rays from dehydrated sludge, the absorbance or the reflectance being obtained by measuring the dehydrated sludge using an infrared measurement apparatus provided with a light-receiving unit that can receive at least infrared rays reflected from a target object to be measured and a light source that has a plurality of infrared LEDs that can emit infrared rays having respectively different wavelengths or a light source having an infrared-region tungsten lamp or halogen lamp.
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公开(公告)号：US20190300394A1
公开(公告)日：2019-10-03
申请号：US16288254
申请日：2019-02-28
Applicant: HITACHI, LTD.
Inventor： Hiroki MIYAKAWA , Kotaro KITAMURA , Masayuki MATSUURA , Takanori OSHIKIRI , Yusuke OKAWA
IPC: C02F1/44
Abstract: A desalination system includes: a pressurized vessel which generates concentrate water and permeate water by causing treatment target water to pass through a reverse osmosis membrane element built in the pressurized vessel; an energy recovery device which is located on a discharge channel so as to discharge the permeate water, and recovers energy of the permeate water; a bypass discharge channel which branches off from the discharge channel and is located between the pressurized vessel and the energy recovery device, and which discharges the permeate water; and a bypass control mechanism which is located on the bypass discharge channel and controls a discharge volume of the permeate water.
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公开(公告)号：US20170121202A1
公开(公告)日：2017-05-04
申请号：US15403294
申请日：2017-01-11
Applicant: HITACHI, LTD.
Inventor： Yasunori SEKINE , Kazuhiko NOTO , Akira SASAKI , Kotaro KITAMURA
CPC classification number: C02F9/00 , B01D61/022 , B01D61/025 , B01D61/06 , B01D61/145 , B01D61/58 , B01D2317/022 , B01D2317/025 , C02F1/001 , C02F1/441 , C02F1/444 , C02F3/1268 , C02F3/1273 , C02F2103/08 , C02F2303/10 , Y02A20/131 , Y02W10/15 , Y02W10/30
Abstract: This desalinization system, which obtains industrial-use water and drinking water from seawater and wastewater, is provided with: a purification device that purifies wastewater by removing activated sludge therefrom; a first RO membrane that removes salt from the output of the purification device by transferring said salt to first concentrated water, thereby producing industrial-use water; a UF membrane that seawater passes through and that removes particulates from said seawater; a second RO membrane that removes salt from the treated output of the UF membrane by transferring said salt to second concentrated water, producing drinking water; an agitation device to which the second concentrated water from the second RO membrane and the first concentrated water from the first RO membrane are sent to be agitated; and a third RO membrane removing salt from the liquid mixture agitated by the agitation device by transferring said salt to third concentrated water, producing industrial-use water.
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Patent Agency Ranking
公开(公告)号：US20190224624A1
公开(公告)日：2019-07-25
申请号：US16319831
申请日：2018-02-07
Applicant: HITACHI, LTD.
Inventor： Kotaro KITAMURA , Yuichi NAKANO
Abstract: A reverse osmosis treatment apparatus includes: a first unit including a plurality of parallel-arranged reverse osmosis membrane modules that perform a primary treatment on water to be treated; and a plurality of second units each including one or more parallel-arranged reverse osmosis membrane modules that perform a subsequent treatment on concentrated water separated at the first unit. Each of the second units includes a concentrated water supply pipe, a concentrated water discharge pipe, a supply pipe valve, and a discharge pipe valve. The concentrated water discharge pipes are connected to the concentrated water supply pipes through a concentrated water return pipe and return pipe valves. A reverse osmosis treatment method includes, after performing subsequent treatments through two or more second units, switching the second unit that performs the subsequent treatment at the last stage.
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公开(公告)号：US20180280888A1
公开(公告)日：2018-10-04
申请号：US15936643
申请日：2018-03-27
Applicant: HITACHI, LTD.
Inventor： Koji FUKUZAKI , Makoto ONISHI , Shinichi YOSHIKAWA , Shuji YAMADA , Kotaro KITAMURA , Yasutaka KONDO
Abstract: A reverse osmosis treatment apparatus includes a membrane unit including an osmosis membrane module. The membrane unit includes a plurality of banks connected in series, each bank including an osmosis membrane module. At least one of the banks includes a treatment water pipe valve and a concentrated water pipe valve, and a bypass pipe capable of diverting the water to be treated, which is to be supplied to the bank, around the bank and draining the water to be treated and a chemical cleaning pipe capable of supplying the reverse osmosis membrane module disposed in the bank with chemical cleaning water are connected. A reverse osmosis treatment method is for cleaning intermittently a bank having the treatment water pipe valve and the concentrated water pipe valve while continuing the reverse osmosis treatment using the remaining bank.
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公开(公告)号：US20170120195A1
公开(公告)日：2017-05-04
申请号：US15403427
申请日：2017-01-11
Applicant: HITACHI, LTD.
Inventor： Yasunori SEKINE , Kazuhiko NOTO , Akira SASAKI , Kotaro KITAMURA
CPC classification number: C02F9/00 , B01D61/022 , B01D61/025 , B01D61/06 , B01D61/145 , B01D61/58 , B01D2317/022 , B01D2317/025 , C02F1/001 , C02F1/441 , C02F1/444 , C02F3/1268 , C02F3/1273 , C02F2103/08 , C02F2303/10 , Y02A20/131 , Y02W10/15 , Y02W10/30
Abstract: This desalinization system, which obtains industrial-use water and drinking water from seawater and wastewater, is provided with: a purification device that purifies wastewater by removing activated sludge therefrom; a first RO membrane that removes salt from the output of the purification device by transferring said salt to first concentrated water, thereby producing industrial-use water; a UF membrane that seawater passes through and that removes particulates from said seawater; a second RO membrane that removes salt from the treated output of the UF membrane by transferring said salt to second concentrated water, producing drinking water; an agitation device to which the second concentrated water from the second RO membrane and the first concentrated water from the first RO membrane are sent to be agitated; and a third RO membrane removing salt from the liquid mixture agitated by the agitation device by transferring said salt to third concentrated water, producing industrial-use water.
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公开(公告)号：US20170354930A1
公开(公告)日：2017-12-14
申请号：US15613587
申请日：2017-06-05
Applicant: Hitachi, Ltd.
Inventor： Kotaro KITAMURA , Hiroki MIYAKAWA , Koji FUKUZAKI
IPC: B01D61/12 , C02F1/44 , B01D61/02 , B01D61/08 , C02F103/08
CPC classification number: B01D61/12 , B01D61/022 , B01D61/06 , B01D61/08 , B01D2311/06 , B01D2311/20 , B01D2311/25 , B01D2313/243 , B01D2313/246 , B01D2317/025 , C02F1/008 , C02F1/441 , C02F2103/08 , C02F2209/001 , C02F2209/005 , C02F2209/03 , C02F2209/05 , C02F2209/40 , C02F2303/10 , Y02A20/131 , Y02W10/30 , B01D2311/04
Abstract: An object of the present invention is to provide a desalination apparatus in which a high pressure pump can be operated at a high efficient operation point even when temperature, salt concentration or the like of water to be treated vary. The desalination apparatus includes a high pressure pump which is provided in a first flow path and supplies raw water to a first module at high pressure to apply reverse osmotic pressure to a first module and a second module, a third flow path for supplying second concentrated water after separation in the second module to upstream of the high pressure pump in the first flow path, and a fourth flow path for supplying a portion of the first concentrated water after separation in the first module to upstream of the high pressure pump in the first flow path.
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公开(公告)号：US20170173534A1
公开(公告)日：2017-06-22
申请号：US15385044
申请日：2016-12-20
Applicant: HITACHI, LTD.
Inventor： Hiroki MIYAKAWA , Kotaro KITAMURA , Masayuki MATSUURA , Takanori OSHIKIRI , Yusuke OKAWA
CPC classification number: B01D61/08 , B01D61/12 , B01D63/12 , B01D2311/14 , B01D2313/246 , B01D2317/022 , C02F1/441 , C02F2103/08 , C02F2209/03 , C02F2303/10 , F01D5/02 , F03B1/02 , F04B23/04 , F04F1/18 , Y02A20/131 , Y02E10/223 , Y02E10/28 , Y02W10/30
Abstract: 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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