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1. 发明专利

JPH09281292A RECYCLED WATER PURIFYING DEVICE 失效
公开(公告)号：JPH09281292A
公开(公告)日：1997-10-31
申请号：JP9079796
申请日：1996-04-12
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KAZAMA SEIICHI , AKITA MINORU , SHIOZAWA YOSHIHIRO
IPC分类号： G21F9/12 , B01D65/00
摘要： PROBLEM TO BE SOLVED: To efficiently remove organic impurities in recycled water by providing an organic substance removing device halfway in a recirculation line returning to a tank from the exit side of a reproduced water transport pump. SOLUTION: The reproduced water of fixed capacity recycled in a waste processing system 21 is moved to the tank 26. The reproduced water in the tank 26 is made by a transport pump 24 to flow to the recirculation line 28 through a reproduced water collection line 22, have its organic substances removed by the organic substance removing device 23 equipped with an ultraviolet- ray irradiation device and an ion exchange device on its downstream side, and return to the tank 26. Here, a line 29 which measures the organic impurity concentration in the tank 26 monitors the water and when the concentration becomes less than a prescribed value, a control valve 25 is opened to supply the water to a condensate storage tank 10. Consequently, the organic substance concentration of the water held in the condensate storage tank 10 can be held low.

2. 发明专利

JPH08122490A DRIVE CONTROL METHOD OF CONDENSATE FILTRATION DEVICE 失效
公开(公告)号：JPH08122490A
公开(公告)日：1996-05-17
申请号：JP25785294
申请日：1994-10-24
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： OGAWA TAKEO , KOBAYASHI MASATO , KAZAMA SEIICHI
IPC分类号： G21D1/02 , B01D63/04 , C02F1/44 , G21D3/00
摘要： PURPOSE: To provide a condensate filtration device capable of facilitating the utilizing of a by-pass of a part of the device and of facilitating the adjustment of a period of water-passing through a hollow fiber membrane and a device designing differential pressure by utilizing the by-pass of the part of the device. CONSTITUTION: In a double condensate purification system consisting of a condensate filtration device 3 and a condensate demineralizer 4, a plurality of filters 7 are arranged in parallel between an entrance header 5 and an exit header 6 and a differential manometer 12 and an equal differential pressure control valve 13 are provided to each of the series of the filters 7. Differential pressures of the filters 7 are different from each other in accordance with pollution degree of a hollow fiber membrane in a tower. However, an opening extent of the equal differential pressure control valve 13 is adjusted in accordance with a signal from the differential manometer 12 to apply a differential pressure so that differential pressure of each of the series of the filters is controlled at a constant level.

3. 发明专利

JPH054029A HOLLOW YARN MEMBRANE MODULE 失效
公开(公告)号：JPH054029A
公开(公告)日：1993-01-14
申请号：JP15805891
申请日：1991-06-28
申请人： HITACHI LTD , HITACHI ENG CO LTD , HITACHI KYOWA KOGYO KK
发明人： KOBAYASHI MASATO , KAZAMA SEIICHI , SHIOZAWA YOSHIHIRO , OGASA KAZUSHI
IPC分类号： B01D63/04 , B01D65/02
摘要： PURPOSE:To improve the handling quality of the hollow yarn membrane module and to improve its performance as a filter device by inserting hollow yarn membranes into an outside cylinder and providing flow changing mechanisms in the outside cylinder in such a manner that this outside cylinder can play the role of protecting the hollow yarn membranes and original liquid filtration and air back washing can be efficiently executed by the outside cylinder and the flow changing mechanisms. CONSTITUTION:The hollow yarn membrane module is constituted by inserting the bundle of the hollow yarn membranes 40 into the outside cylinder 51 and providing one or plural pieces of the flow changing mechanisms 53 between the bottom end and top end of the bundle of the hollow yarn membranes in the outside cylinder 51. The original liquid and the air for back washing are introduced from the bottom end of the outside cylinder 51 and flow by ascending in the outside cylinder 51 while the flow thereof is changed b7 the introducing holes 54 of the flow changing mechanisms 53 and the liquid and air are uniformly supplied to respective pieces of the hollow yarn.

4. 发明专利

JP2000271411A FILTER AND METHOD OF BACKWASHING SAME 失效
公开(公告)号：JP2000271411A
公开(公告)日：2000-10-03
申请号：JP8124399
申请日：1999-03-25
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： AKAGAWA WATARU , HIRABAYASHI KENTARO , SHIOZAWA YOSHIHIRO , KAZAMA SEIICHI
IPC分类号： B01D29/07 , B01D29/66
摘要： PROBLEM TO BE SOLVED: To prevent an increase in the accumulated quantity of a suspension to an element in the case a filter is backwashed by feeding water pressurized by compressed air to the element from the reverse direction to that on filter operation to perform backwashing and keeping the pressure of the compressed air at pressure near to withstanding pressure of the element at that time. SOLUTION: In the case backwashing is performed when the surface of filter cloth is gradually covered with a separated suspension to clog it and filter pressure drop of an element 13 is increased, high pressure air fed from a backwashing air source 19 through an air valve 20 and a backwashing pipeline 21 is led into a lower vessel 15 to forcibly feed filtrate held in the lower vessel 15 into the element 13. In this way, the filtrate is led into the element 13 from below an arbor to eliminate and remove the suspension on the outer surface of the filter cloth from the surface of the filter cloth. At this time, the pressure of the air fed from the backwashing air source 19 is set at a value as high as possible not exceeding 0.35 MPa in consideration of withstanding pressure of the element 13 being 0.35 MPa.

5. 发明专利

JPH10332877A MIXING BED TYPE DEMINERALIZER 失效
公开(公告)号：JPH10332877A
公开(公告)日：1998-12-18
申请号：JP14143497
申请日：1997-05-30
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： HANAOKA SHUICHI , SHIOZAWA YOSHIHIRO , KAZAMA SEIICHI
IPC分类号： G21C19/307 , G21D3/08
摘要： PROBLEM TO BE SOLVED: To provide a condensate demineralizer provided with a means preventing performance degradation caused by the degradation of ion exchanger resin due to water containing oxidizing material such as hydrogen peroxide and maintaining reactor water at high purity in purifying and processing the condensate in a reactor power station. SOLUTION: An iron crad injector 70 injecting iron crad in a demineralizer tower inlet header 21 is provided to form a condensate demineralizer 8 capable of loading iron crad in the ion exchanger resin in a demineralizer tower 24. Since iron crad is loaded in ion exchanger resin, performance degradation of ion exchanger resin due to water containing oxidizing materials such as hydrogen peroxide in condensate purification operation and resin washing recovery can be prevented and reactor water quality can be maintained highly pure.

6. 发明专利

JPH1015364A LIQUID FILTRATION DEVICE 失效
公开(公告)号：JPH1015364A
公开(公告)日：1998-01-20
申请号：JP17204396
申请日：1996-07-02
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KAZAMA SEIICHI , KOBAYASHI MASATO , SHIOZAWA YOSHIHIRO
IPC分类号： B01D63/14 , B01D29/07 , B01D29/66 , B01D29/92 , B01D65/02 , C02F1/44
摘要： PROBLEM TO BE SOLVED: To extend the usable period of a pleat element and reduce the consumption of water when used for cleaning. SOLUTION: Inlet piping 1 is connected to the lower part of a barrel container 3 and outlet piping 2 is connected to the upper part. A water distributing pipe 11 extending from a filtrate storage tank 10 is connected to the outlet piping 2. The filtrate storage tank 10 is connected to an air tank 9 through piping 6. The piping 6 has a valve 7 and a filtrate tank diaphragm valve 5, and water piping 14 is connected to the outlet piping 2 from an area between the valve 7 and the filtrate tank diaphragm valve 5. The internal air of the air tank 9 is seat to a lid container 4 passing through the piping 14 and the outlet piping 2 by opening the valve 7 provided in the air piping 6, and also is sent to the filtrate storage tank 10 by opening the diaphragm valve 5.

7. 发明专利

JPH1085566A PLEATED TYPE FILTER 失效
公开(公告)号：JPH1085566A
公开(公告)日：1998-04-07
申请号：JP24014096
申请日：1996-09-11
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： OKUBO KYOICHI , SHIOZAWA YOSHIHIRO , KAZAMA SEIICHI
IPC分类号： G21F9/06 , B01D63/14 , B01D65/02 , C02F1/44
摘要： PROBLEM TO BE SOLVED: To discharge backwash water uniformly and improve the backwash efficiency by feeding water in a body vessel with a pleated element and increase the resistance on the outer surface of a pleated type filter membrane at the time of backwashing. SOLUTION: At the time of backwashing, a valve 6 is opened and the inside of a cover vessel 4 is pressurized by compressed air in an air tank 7. After pressurizing, when a drain valve 11 is opened quickly, the air in the cover vessel 4 is expanded, following which backwash water in the cover vessel 4 is backwashed from the inner surface to the outer surface of a plated type membrane 12 to backwash elements 12. At the time of repeating the operation, the inside of the cover vessel 4 and the body vessel 3 are in the state of being filled sufficiently with reinforcing water supply from a reinforcing water line 8 and a valve 9, and then the operation of pressurizing by the compressed air in the air tank 7 and opening the drain valve 11 is repeated to backwash the pleated type elements 12. The water level in a filter is adjusted by the arrangement and efficient backwashing is carried out to uniformize the backwash intervals and extend the period of use.

8. 发明专利

JPH057740A MULTISTAGE HOLLOW YARN MEMBRANE MODULE-CONNECTED BODY AND FILTER USING THE SAME 失效
公开(公告)号：JPH057740A
公开(公告)日：1993-01-19
申请号：JP15877391
申请日：1991-06-28
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： SHIOZAWA YOSHIHIRO , KAZAMA SEIICHI
IPC分类号： B01D63/04 , B01D65/02
摘要： PURPOSE:To dispense with the fixing metal jig connecting a plurality of hollow yarn membrane modules and to improve handling properties and transport properties by providing the hollow yarn membrane modules in the outer cylinder for inserting the hollow yarn membrane modules provided to the connected body so that said modules are superposed one upon another in up-and-down relation. CONSTITUTION:A plurality of hollow yarn membrane modules 42 each formed by bonding and fixing hollow yarn membranes and a plurality of rods 43 to end members 36 are inserted in a hollow yarn membrane module inserting outer cylinder 46. An end member 31 for hanging a filter container from a partition plate is fixed to the upper end of the outer cylinder 46 and a cap 47 is fixed to the lower end of the outer cylinder 46. Spacers 45 preventing the direct contact of the end members 36 are provided between the cap 47 and the modules 42 and between the modules 42, and the space parts of the spacers 45 are used as water gathering chambers. As a result, since the bonded body of the modules is equipped with the outer cylinder 46, the fixing metal jig connecting the modules becomes unnecessary and, since the outer cylinder 46 also plays the role of the protection of the hollow yarn membranes 40, handling properties and transport properties are improved.

9. 发明专利

JPH11207152A HOLLOW YARN MEMBRANE MODULE 失效
公开(公告)号：JPH11207152A
公开(公告)日：1999-08-03
申请号：JP1225398
申请日：1998-01-26
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： OKUBO KYOICHI , SHIOZAWA YOSHIHIRO , KAZAMA SEIICHI
IPC分类号： B01D63/00 , B01D63/02 , B01D65/02
摘要： PROBLEM TO BE SOLVED: To prevent damage to yarn on backwashing of hollow yarn membranes by low pressure air to improve the removal effect of suspended matter caught on the outer surface of the hollow yarn membranes. SOLUTION: In an outer cylinder 51 of a hollow yarn membrane module 42, a lot of holes (backwashing air holes) 47 are made for feeding original liquid and for discharging low pressure air fed on low pressure backwashing of the hollow yarn membrane module 42 to outside the module. The center positions of the holes 47 are 70 mm or more from the lower end face of an adhesive by which the upper end part of the hollow yarn membrane bundle is adhered and fixed to the outer cylinder 51, and in the outer cylinder 51 between the backwashing holes 47 nearest to the lower end face of the adhesive and the lower end face of the adhesive, air vent holes 48 of 0.5-3 mm diameter are made. And adhesive injection holes made in the upper part of the outer cylinder 51 in order to inject the adhesive when hollow yarn membranes 40 are bundled and adhered and fixed to the outer cylinder 51 are used as the air vent holes 48 by closing them with plugs in which holed of 0.5-3 mm diameter are made.

10. 发明专利

JPH10197686A REACTOR POWER PLANT AND ITS OPERATION METHOD 失效
公开(公告)号：JPH10197686A
公开(公告)日：1998-07-31
申请号：JP218697
申请日：1997-01-09
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KAZAMA SEIICHI , KOBAYASHI MASATO , SHIOZAWA YOSHIHIRO
IPC分类号： G21D1/02 , G21D3/00 , G21F9/06
摘要： PROBLEM TO BE SOLVED: To suppress to minimum the generation quantity of waste of filtering assistant and efficiently purify condensate. SOLUTION: In a condensate filtering device 6, A filtering tower group 12 having pleats type filter element and B filtering tower group 14 having hollow fiber membrane type element are connected in parallel to each other. By separately using the towers of A filtering tower group 12 and B filtering tower group 14 before startup of plant, the condensate condensed in a condenser 5 can be washed desirably and insoluble impurity and soluble impurity can be removed better than that using only powder resin precoat type or only hollow fiber membrane type so that condensate before startup of the plant can be efficiently washed. Therefore, the condensate demineralization device can surely be prolonged in life and reduction of operation cost can be planned that much.

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