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21. 发明专利

JPS6286200A METHOD FOR ADJUSTING DISSOLUTION RATE IN REDUCTION DECONTAMINATION 失效
公开(公告)号：JPS6286200A
公开(公告)日：1987-04-20
申请号：JP22678385
申请日：1985-10-14
申请人： HITACHI LTD
发明人： SAWA TOSHIO , ITO HISAO , KOBAYASHI MASATO
IPC分类号： C25F3/00 , C25F1/06 , G21F9/28
摘要： PURPOSE:To exactly discriminate the completion of the decontamination of a radioactive oxide in a nuclear power plant by connecting the parts on which the radioactive oxide sticks and carbon steel sacrificial anode via an ammeter, immersing the same in a decontaminating liquid and monitoring the current value flowing in the ammeter. CONSTITUTION:The stainless steel 10 which is used in the nuclear power plant and on which the radioactive oxide sticks and the carbon steel 13 as the sacrificial electrode are immersed into the decontaminating liquid 16 essentially consisting of a complexing agent and are connected by a lead wire 14. The ammeter 15 is connected to the mid-way thereof. The steel 13 acts as the anode and the stainless steel 10 having the radioactive oxide as the cathode in the liquid 16 and electric current flows between the same. The current flowing between the radioactive oxide Fe3O4 and the electrode 13 is 0.23mA/cm and the potential is -0.62V at the electrode 13. The current is 0.11mA/cm and the potential is -0.68V between the stainless steel and the electrode 13; therefore, the completion of the dissolution of the radioactive Fe3O4 on the surface of the stainless steel parts is discriminated from the change of said values. The parts are then pulled up from the liquid 16, by which the dissolution of the stainless steel parts themselves is prevented.

22. 发明专利

JPS61118700A Method and device for slowly cooling oxide film 失效
标题翻译：用于慢速冷却氧化膜的方法和装置
公开(公告)号：JPS61118700A
公开(公告)日：1986-06-05
申请号：JP24034484
申请日：1984-11-14
申请人： Hitachi Ltd
发明人： SAWA TOSHIO
IPC分类号： C23G1/00 , G21F9/00 , G21F9/28 , G21F9/30

23. 发明专利

JPS6053680B2 失效
公开(公告)号：JPS6053680B2
公开(公告)日：1985-11-27
申请号：JP9612677
申请日：1977-08-12
申请人： HITACHI LTD
发明人： SAWA TOSHIO , IZUMI KENKICHI , SHIMOKAWABE IKUO , TAKAHASHI SANKICHI , YAMADA AKIRA , ADACHI TETSURO
IPC分类号： C02F1/461 , C02F1/46 , C02F1/64

24. 发明专利

JPS60161594A PURIFIER FOR FURNACE WATER OF REACTOR 失效
公开(公告)号：JPS60161594A
公开(公告)日：1985-08-23
申请号：JP1759984
申请日：1984-02-02
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： ETSUNO YASUO , SAITOU TOORU , SAWA TOSHIO , YAMADA AKIRA
IPC分类号： G21C19/307 , G21C19/30

25. 发明专利

JPS603598A ELECTRO-REDUCTION DECONTAMINATING SYSTEM 失效
公开(公告)号：JPS603598A
公开(公告)日：1985-01-09
申请号：JP11079183
申请日：1983-06-22
申请人： HITACHI LTD
发明人： SAWA TOSHIO
IPC分类号： G21F9/06 , G21F9/00 , G21F9/28 , G21F9/30

26. 发明专利

JPS59170300A Removing method of surface metallic oxide 失效
标题翻译：表面金属氧化物的去除方法
公开(公告)号：JPS59170300A
公开(公告)日：1984-09-26
申请号：JP4567583
申请日：1983-03-18
申请人： Hitachi Eng Co Ltd , Hitachi Ltd , Tokyo Genshiryoku Sangyo Kenkyusho
发明人： FURUYA YASUMASA , HIRA YASUO , HASEGAWA TAKASHI , MINATO AKIRA , SAWA TOSHIO , USUI HARUO , SUMIDA NOBUO
IPC分类号： G21F9/28 , C25F1/04 , G21F9/00
摘要： PURPOSE: To remove surface metallic oxide from a material to be washed without dissolving said material by bringing a washing liquid of which the reducing power is strengthened by an electrolytic reduction into contact with said material, and impressing a DC voltage on the material as cathode thereby causing cathode polarization.
CONSTITUTION: A material to be washed (piping) 1 from which the metallic oxide on the inside surface is to be removed is connected via a connecting pipe 4 to electrolytic cells 2, 3. An anode 7 and a cathode 8 are disposed via an ion exchange membrane 9 to the cell 2 and a washing liquid 6 contg. a complexing agent or reducing agent is circulated by a pump 5, then electric current is conducted to the anode 7 and the cathode 8 from a DC power source 10 to reduce electrolytically the liquid 6 and to increase the reducing power thereof. On the other hand, only the anode 11 is provided via an ion exchange member 12 in the cell 3 and electric current is conducted from a DC power source 13 to the material 1 as cathode so that the material 1 is brought into cathode polarization. The dissolution of the metallic oxide on the inside surface of the material 1 is thus accelerated by the approximately neutral washing liquid having weak corrosiveness.
COPYRIGHT: (C)1984,JPO&Japio
摘要翻译：目的：为了通过将电解还原作用使还原能力强化的洗涤液与所述材料接触而将所述材料中的表面金属氧化物除去而不溶解所述材料，并将作为阴极的直流电压施加在材料上引起阴极极化。构成：要从其中去除内表面上的金属氧化物的要洗涤的材料（管道）1经由连接管4连接到电解池2,3，阳极7和阴极8经由离子交换膜9到电池2和洗涤液6，络合剂或还原剂通过泵5循环，然后从直流电源10向阳极7和阴极8传导电流，以电解电解液体6并增加其还原能力。另一方面，仅通过电池单元3中的离子交换构件12设置阳极11，并且从直流电源13将电流作为阴极传导到材料1，使得材料1成为阴极极化。金属氧化物在材料1的内表面的溶解因此被具有弱腐蚀性的近似中性的洗涤液加速。

27. 发明专利

JPS59162493A Method of removing iron oxide adhering to ion exchange resin 失效
标题翻译：将氧化镍粘附到离子交换树脂中的方法
公开(公告)号：JPS59162493A
公开(公告)日：1984-09-13
申请号：JP3598283
申请日：1983-03-07
申请人： Hitachi Ltd , Hitachi Eng Co Ltd
发明人： SAWA TOSHIO , OGAWA TOSHIO , IZUMI KENKICHI , SUMIDA NOBUO , KATAOKA ICHIROU
IPC分类号： G21F9/30 , B01J49/00 , G21F9/00 , G21F9/12

28. 发明专利

JPS58210200A METHOD FOR DISSOLVING IRON OXIDE FILM 失效
公开(公告)号：JPS58210200A
公开(公告)日：1983-12-07
申请号：JP9440782
申请日：1982-06-02
申请人： HITACHI LTD
发明人： SAWA TOSHIO , TAKAHASHI SANKICHI , IZUMI KENKICHI , SUMIDA OSAO , ITOU HISAO
IPC分类号： C25F7/00 , C25F1/06 , G21F9/28
摘要： PURPOSE:To enable the dissolution of iron oxide even with a base material of an intricate system without the possibility of dissolution of the base material and corrosion by the residual liquid thereof, by flowing the leakage current of an electrolytic cell connected to the metallic base material, which is stuck with the iron oxide film on the inside surface, by means of a liquid path. CONSTITUTION:A recirculation system 2 for decontamination liquid is connected to a water flow piping 1 and apparatus in an atomic power plant which are desired to be removed of the iron oxide film. An electrolytic cell 3, a storage tank 4 with a heating source, an ion recovery vessel 5 and a liquid feed pump P are disposed between both ends of said system. The cell 3 is isolated to anode and cathode chambers 7, 8 with an ion exchange membrane 6 to permit electrolysis with diaphragm. The cathode and the pipe 1 are grounded 9 and are kept at the same potential. To decontaminate the pipe 1, both valves of the piping near the juncture of the system 2 are closed and decontamination liquid is recirculted in an arrow direction by the pump P, then the liquid receives electric charge in the chamber 8. The electric charge conducts in the liquid and enters the pipe 1 where the charge passes through the iron oxide film and is received with the ground 9. As the electric charge transfers, the dissolution of the iron oxide film prograsses and the iron oxide elutes as ion ions in the decontamination liquid. The iron ions are removed with the device 5 constituted of an absorbent or the like.

29. 发明专利

JPS58184596A Electrolytic cell for recovering trace mount of metal ion or clad in rich salt solution 失效
标题翻译：电解槽用于回收金属离子或柠檬酸盐溶液中的痕迹
公开(公告)号：JPS58184596A
公开(公告)日：1983-10-28
申请号：JP6742782
申请日：1982-04-23
申请人： Hitachi Ltd
发明人： SAWA TOSHIO , MATSUMOTO TAKAYUKI , TAKAHASHI SANKICHI
IPC分类号： G21F9/06 , C25C1/00 , G21F9/00 , G21F9/12
CPC分类号： Y02P10/234

30. 发明专利

JPS57162698A WASTE WATER TREATMENT DEVICE 失效
公开(公告)号：JPS57162698A
公开(公告)日：1982-10-06
申请号：JP4647981
申请日：1981-03-31
申请人： HITACHI LTD
发明人： SAWA TOSHIO , TAKAHASHI SANKICHI , KUBOTA MASAYOSHI , MATSUMOTO TAKAYUKI
IPC分类号： C02F3/06 , C02F9/00
摘要： PURPOSE:To permit removal of BOD in waste water by pretreating the waste water in a catalytic oxidation tank and a pressure flotation separation tank prior to treating of the same in an active carbon packed electrolytic cell. CONSTITUTION:The waste water treatment device is constituted of a catalytic oxidation tank 1, a pressure flotation separation tank 2, and an active carbon packed electrolytic cell 3. The tank 1 is of a double cylindrical shape, into which the foam of air is introduced from the bottom part of a cylindrical part 4. Packings for the purpose of formation of biological membranes are loaded in an outside circumferential part 5. The liquid can be circulated by the ascending foam of the part 4. The tank 2 is of a cylindrical shape, and a flocculating agent 8 and the pressurized water from an air dissolving tank 9 can be injected through an inlet 10 into a central inside circumferential part 7. A scraper 11 for recovering of froth is provided in the upper part of the floating part. The tank 3 is constituted of a flotation part 12 with a flow regulating cylinder, a scraper 14 for recovering froth and an electrolytic part 13 packed with a granular active carbon between the cathode and the anode. When the waste water is pretreated with such tanks 1, 2, the waste water is made lower in molecules on account of the property changes of org. materials and the org. materials are effectively oxidized and decomposed in the tank 3.

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