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公开(公告)号：JP2000000437A
公开(公告)日：2000-01-07
申请号：JP17121098
申请日：1998-06-18
Applicant: TORAY INDUSTRIES
Inventor： MINEGISHI SHINICHI , KIHARA MASAHIRO , NAKANISHI TAKAYUKI
Abstract: PROBLEM TO BE SOLVED: To provide a spiral reverse-osmosis membrane element without the pressure drop being too large, with the deterioration of the element due to concn, polarization suppressed and with the intrinsic performance of the membrane fully exhibited. SOLUTION: This spiral reverse-osmosis membrane element is formed by winding an envelope-shaped reverse-osmosis membrane, a flow passage material on the permeated water side in which wiry material is arranged orthogonally to the raw water flow direction and a flow passage material having a square mesh structure on the raw water side on a water collecting pipe. In the element, the space X between the intersections of the wiry materials vertical to the axis of the water collecting pipe of the flow passage material on the raw water side is controlled to 2-5 mm, and the space Y between the intersections parallel to the axis of the water collecting pipe is adjusted to 1-1.8 times the space X.
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公开(公告)号：JPH11319507A
公开(公告)日：1999-11-24
申请号：JP14067798
申请日：1998-05-22
Applicant: TORAY INDUSTRIES
Inventor： SAKAI KENJI , TANIGUCHI MASAHIDE , KIHARA MASAHIRO
Abstract: PROBLEM TO BE SOLVED: To provide a hollow fiber membrane module whose hollow fiber membranes are prevented from damages due to deterioration of the membranes by installing a protective cylinder for covering the hollow fiber membrane bundle near the adhesive fixation part and preventing deposition of suspended solid in the protective cylinder. SOLUTION: In this hollow fiber membrane module, a bundle 2 of a large number of hollow fiber membranes having an adhesive fixed part 3 in at least one end is fixed in an upper part of a housing 1 and the circumference of the hollow fiber membrane bundle 2 in the fixed end is covered with a protective cylinder 4 extended from the adhesive fixed part 3 and an air jetting hole 6 for air scrubbing is formed in a lower part of the housing 1 and an air discharge port 7 is formed in the peripheral part of the adhesive fixed part 3 in the upper part of the housing. In such a hollow fiber membrane module, the cylindrical face of the protective cylinder 4 is made a closed face through which a fluid is impossible to pass in the region at least 10 mm from the adhesive fixed part 3 and an opening part 40 through which a fluid can freely pass is formed in a region of 10-60 mm from the adhesive fixed part 3.
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公开(公告)号：JPH11267643A
公开(公告)日：1999-10-05
申请号：JP1029499
申请日：1999-01-19
Applicant: TORAY INDUSTRIES
Inventor： NAKANISHI TAKAYUKI , KIHARA MASAHIRO , INOHARA MASAHIRO
Abstract: PROBLEM TO BE SOLVED: To economically convert sea water to fresh water by providing a means for pressurizing raw water supplied to a reverse osmosis membrane module for a pump with steam to use steam energy for the power for the pump with respect to a sea water desanilation plant containing the pump and the reverse osmosis membrane module and using a reverse osmosis membrane. SOLUTION: At least a boiler 1 for generating steam by the combustion of heavy oil or coal is provided and a steam turbine 6 is driven sing steam generated thereby as power to drive a high pressure pump 6. The steam discharged from the steam turbine 2 is utilized for heating the collected sea water in a heat exchanger 5 and the steam is cooled and discharged as drain 14. Thus, the collected sea water is heated, pressurized by the pump 6 to be fed to a reverse osmosis membrane unit 7 and separated into a concentrated water 12 concentrated in the salt portion and fresh water 13. By using the device, fresh water is efficiently and economically produced from sea water with efficient use of energy.
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公开(公告)号：JP2003200161A
公开(公告)日：2003-07-15
申请号：JP2002002095
申请日：2002-01-09
Applicant: TORAY INDUSTRIES
Inventor： NAKANISHI TAKAYUKI , KIHARA MASAHIRO , KITADE TAMOTSU
Abstract: PROBLEM TO BE SOLVED: To provide a water making method capable of achieving a high recovery ratio and energy saving while keeping water quality, in obtained drinking water or the like by separating seawater or highly concentrated salt water into transmitted water and concentrated water by an NF membrane module, and a water making apparatus using the same. SOLUTION: In the water making method constituted so that seawater and/or highly concentrated salt water is supplied to nano-filtration membrane (NF membrane) moduli in a multistage fashion to be separated into permeated water and concentrated water and the transmitted water of the NF membrane moduli is supplied to a reverse osmosis membrane (RO membrane) to be further separated into permeated water and concentrated water, the concentrated water of the front stage NF membrane module is supplied to the next stage NF membrane module. COPYRIGHT: (C)2003,JPO
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公开(公告)号：JP2003170165A
公开(公告)日：2003-06-17
申请号：JP2002274508
申请日：2002-09-20
Applicant: TORAY INDUSTRIES
Inventor： KIHARA MASAHIRO , NAKANISHI TAKAYUKI , KITADE TAMOTSU
Abstract: PROBLEM TO BE SOLVED: To provide a method to obtain fresh water from raw water with high efficiency by a membrane treatment. SOLUTION: The method for making the fresh water includes a turbidity removing process to remove the turbid substance in the raw water to obtain the fresh water free from the turbid substance, a nano filtration process to remove scale components in the water by a nano filter membrane to obtain a filtrate, and a reverse osmosis process to subject the filtrate to the treatment by a reverse osmosis membrane. The microfiltration membrane or ultrafiltration membrane is used in the turbidity removing process and the recovery rate of the fresh water is controlled to ≥90%. COPYRIGHT: (C)2003,JPO
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Patent Agency Ranking
公开(公告)号：JP2002338242A
公开(公告)日：2002-11-27
申请号：JP2001150751
申请日：2001-05-21
Applicant: TORAY INDUSTRIES
Inventor： KIHARA MASAHIRO , NAKANISHI TAKAYUKI
Abstract: PROBLEM TO BE SOLVED: To provide a method for manufacturing a mineral oxide having lower solubility in water than a chloride by efficiently separating mineral components, such as calcium and magnesium, from seawater. SOLUTION: This method for manufacturing the mineral oxide has a process step of separating the seawater to fresh water and a concentrate by reverse osmosis membrane, a process step of obtaining a high-mineral-content liquid by removing a sodium chloride from the concentrate, a process step of obtaining a high-mineral chloride by heating the high-mineral-content liquid and a process step of calcining and oxidizing the high-mineral chloride.
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公开(公告)号：JP2001252657A
公开(公告)日：2001-09-18
申请号：JP2000067420
申请日：2000-03-10
Applicant: TORAY INDUSTRIES
Inventor： MIYOSHI TOSHIRO , NAKAMURA YOSHISUKE , KIHARA MASAHIRO , FUSAOKA YOSHINARI
Abstract: PROBLEM TO BE SOLVED: To provide a fresh water generating method using reverse osmotic separation by which the water generating cost is reduced and besides, a stable operation is enabled for a long period. SOLUTION: In this fresh water generating method, >=2 stages of reverse osmotic separations different in respective operation pressures are performed and feeding sea water 10 is separated by reverse osmosis at the initial stage to obtain concentrated sea water 20b, and thereafter the operation processes by which the concentrated sea water obtained at the preceding stage is further raised in pressure and is separated by reverse osmosis at the succeeding stage, are successively performed and then fresh water is generated by recovering permeated water 20a, 40a obtained at respective stages. In this case, when salt concentration of the feeding sea water 10 is M (wt.%), the operation is performed under the salt concentration of concentrated sea water at the initial stage defined in the range of >=1.2 M and
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公开(公告)号：JP2001252655A
公开(公告)日：2001-09-18
申请号：JP2000067417
申请日：2000-03-10
Applicant: TORAY INDUSTRIES
Inventor： MIYOSHI TOSHIRO , NAKAMURA YOSHISUKE , KIHARA MASAHIRO , FUSAOKA YOSHINARI
Abstract: PROBLEM TO BE SOLVED: To provide a fresh water generating method using reverse osmotic separation by which the generating cost of fresh water is reduced and a stable operation is enabled for a long period. SOLUTION: In this fresh water generating method from sea water, at least two reverse osmosis membrane module units 2, 4 containing reverse osmosis membrane elements provided in connection in series are used, and sea water is fed to the reverse osmosis membrane module 2 at the initial stage and also concentrated sea water obtained from the reverse osmosis membrane module unit 2 at the preceding stage is fed to the reverse osmosis membrane module unit 4 at the succeeding stage, and then permeated water is obtained from respective stages. In this case, sea water us treated under the conditions in which a membrane surface flow rate of the feeding sea water is controlled at >=0.03 m/s in every reverse osmosis membrane element, and also the total recovery ratio X of the permeated water, when sea water having >=3.5 wt.% salt concentration is used as the sea water fed to the reverse osmosis membrane module unit 2 at the initial stage, and a recovery ratio Y of the permeated water by the reverse osmosis membrane module unit at the initial stage satisfy the formula: 0.2 X
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公开(公告)号：JP2001252543A
公开(公告)日：2001-09-18
申请号：JP2000067416
申请日：2000-03-10
Applicant: TORAY INDUSTRIES
Inventor： KIHARA MASAHIRO , OOTO KATSUFUMI , FURUNO SHUJI
Abstract: PROBLEM TO BE SOLVED: To provide a reverse osmosis composite membrane in which the compaction of a support membrane and the deformation of a separation function layer are controlled even during high pressure operation so that separation performance and a fresh water generation ratio can be kept. SOLUTION: In the composite membrane in which a base material 2A, the support membrane 2B having communication holes 2b, and the separation function layer 2C are laminated in turn, when, after a pressure of 5.5 MPa is applied to the composite membrane for 3 h and the application is lifted, an optical position in the thickness direction of the support membrane is X, the average bore diameter of the holes 2b at the position X is Y1 (μm), and after a pressure of 10 MPa is subsequently applied to the composite membrane for 3 h and the application is lifted, the average bore diameter of the holes 2b at a position corresponding to the position X is Y2 (μm), X and Y1 satisfy formula (1): 0.3X+0.01
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30.发明专利
公开(公告)号：JP2001239134A
公开(公告)日：2001-09-04
申请号：JP2000055876
申请日：2000-03-01
Applicant: TORAY INDUSTRIES
Inventor： TANIGUCHI MASAHIDE , KIHARA MASAHIRO , UCHIYAMA TAKESHI
Abstract: PROBLEM TO BE SOLVED: To provide a method for operating a reverse osmosis treatment device capable of maintaining the high quality of permeating water irrespective of the change in the temperature of raw water and the membrane performance of a reverse osmosis module, and reducing the cost of making water while suppressing the variation in the amount of the permeating water. SOLUTION: The reverse osmosis treatment device obtains permeating water by pressurizing the raw water (marine water) and supplying the same to a plurality of reverse osmosis membrane module-units 2a, 2b-2n. The device is provided with an operation administration/control part which controls the number of operated reverse osmosis membrane module-units depending on the temperature of the raw water and/or the quality of the permeating water. When the temperature of the raw water is elevated, the number of operation is reduced and the operation pressure is raised.
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