专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

21. 发明专利

JP2001324494A BOILER PIPE SCALE DISSOLVING TEST APPARATUS 失效
公开(公告)号：JP2001324494A
公开(公告)日：2001-11-22
申请号：JP2000142051
申请日：2000-05-15
申请人： KURITA ENG CO LTD
发明人： YOSHIKAWA HIROO , KIMURA TAKATOSHI
IPC分类号： G01N33/00 , F22B37/02
摘要： PROBLEM TO BE SOLVED: To provide a boiler pipe scale dissolving test apparatus, capable of reducing the amount of a dissolving liquid required in a scale dissolving test to a large extent. SOLUTION: The flange 2A, mounted on the upper end of a boiler pipe 1, has no nozzle 7, and the nozzle 41 of a circulating container 40 is inserted in the through-hole 6 of the flange 2A. The nozzle 4 is projected from the lower part of the circulating container 40 in the vertical direction. One end of a soft flexible tube 43 is connected to the liquid outlet 42, provided to the side surface of the circulating container 40, and the other end thereof is connected to the nozzle 9 of a flange 3. A tube pump 44 for sending a liquid into the tube 43 is provided on the way of the tube 43. When the tube pump 44 is driven, the scale-dissolving liquid in the circulating container 40 is circulated successively through the tube 43, the boiler pipe 1 and the circulating container 40.

22. 发明专利

JP2001083294A METHOD FOR CHEMICAL DECONTAMINATION 失效
公开(公告)号：JP2001083294A
公开(公告)日：2001-03-30
申请号：JP25753299
申请日：1999-09-10
申请人： HITACHI LTD , KURITA ENG CO LTD , KURITA WATER IND LTD
发明人： NAKAMURA FUMITO , AIZAWA MOTOHIRO , NAGASE MAKOTO , FURUKAWA SEIJI , YOSHIKAWA HIROO
IPC分类号： G21F9/28
摘要： PROBLEM TO BE SOLVED: To stably achieve goals DF and the quality of water when the chemical decontamination finishes. SOLUTION: In a method for chemical decontamination where radioactive nuclides are chemically removed from the surface of a metal member that is contaminated with the radioactive nuclides, this method for chemical decontamination is processed by a reductive decontamination process where a reductive decontamination agent composed mainly of an organic acid is used as a decontamination liquid, and by inhibiting radioactive metal ions from leaking from a resin tower during the decomposition of the reductive decontamination agent that is carried out after the completion of the reductive decontamination process. The leak of the radioactive metal ions from the resin tower can be inhibited by appropriately controlling the quantity and time of the water supplied to the resin tower on the basis of the concentration of a reductive decontamination agent, the potential of hydrogen (pH) and the concentration of metal ions in a decontamination liquid in the reductive decontamination process, and a process for decomposing the reductive decontamination agent. This makes it possible to stably achieve goals DF and the standard of water quality when chemical decontamination finishes.

23. 发明专利

JP2001012894A WASHING DEVICE FOR GROUP OF TUBES FOR HEAT EXCHANGER 失效
公开(公告)号：JP2001012894A
公开(公告)日：2001-01-19
申请号：JP18028199
申请日：1999-06-25
申请人： KURITA ENG CO LTD
发明人： SUGIMOTO YOSHIO
IPC分类号： F28G1/16
摘要： PROBLEM TO BE SOLVED: To permit the efficient and uniform washing of the group of tubes for a heat exchanger. SOLUTION: A washing device 20 for the group of tubes for a heat exchanger is equipped with a beam 21, a rack 22 extended on the upper surface of the beam 21 into the lengthwise direction of the same, a running carriage 23 equipped with a pinion engaged with the rack 22 permitted to run on the beam 21, an air motor 24 installed on the carriage 23 to drive the pinion, and lances 30, 31, 32, 33 which are attached to the carriage 23 through mounting members 25. Water is ejected from respective lances 30-33 toward both left and right sides, obliquely upward and obliquely downward of the running direction of the carriage 23.

24. 发明专利

JP2003245616A CHEMICAL WASHING METHOD 有权
公开(公告)号：JP2003245616A
公开(公告)日：2003-09-02
申请号：JP2002046537
申请日：2002-02-22
申请人： TOKYO ELECTRIC POWER CO , KURITA ENG CO LTD
发明人： AKUTSU NOBUO , UMEDA YOKO , TSUCHIDA MAKOTO , YOSHIKAWA TADAYOSHI , KIYOTAKI KAZUHIRO , KAWAGUCHI HIROTOMI , TAKESHITA MASANORI
IPC分类号： B08B3/08 , B01D61/02 , B01D61/58 , C02F1/04 , C02F1/42 , C02F1/44 , C02F1/469 , C02F5/00 , C02F5/10 , C23G1/08 , C23G1/36 , F22B37/52
摘要： PROBLEM TO BE SOLVED: To recover and reutilize an organic acid by efficiently treating an organic acid-containing washing waste liquid generated when a boiler or the like is chemically washed with a washing liquid containing the organic acid as a main component. SOLUTION: The washing liquid containing the organic acid as the main component is passed through the boiler 1 to wash the boiler. The washing waste liquid is brought into contact with an H-type cation exchange resin 5 not only to remove metal ions eluted by the organic acid but also to convert a metal salt of the organic acid to the organic acid to regenerate the discharged washing liquid. The regenerated washing liquid is circulated to be used in washing. After the washing liquid is circulated to be used, the regenerated washing liquid is concentrated to recover the highly concentrated organic acid. COPYRIGHT: (C)2003,JPO

25. 发明专利

JP2002177902A METHOD FOR CLEANING EQUIPMENT OF WASTE INCINERATOR 失效
公开(公告)号：JP2002177902A
公开(公告)日：2002-06-25
申请号：JP2000374650
申请日：2000-12-08
申请人： KURITA WATER IND LTD , KURITA ENG CO LTD
发明人： UCHIDA TOSHIHITO , ISHIZUKA KAORU , FUKUMOTO TOSHIHARU
IPC分类号： B08B3/02 , C02F1/28 , C02F1/52 , C02F1/54 , C02F1/62 , F23G5/44 , F23J1/00 , F23J1/06
摘要： PROBLEM TO BE SOLVED: To efficiently treat and reuse waste water generated when contaminants stuck to equipment of a waste incinerator are removed by using high-pressure water in the case of dismantling the equipment of the waste incinerator. SOLUTION: This cleaning method comprises insolubilizing Pd, Cd and Hg in the first reaction tank 1 by adding a dithiocarbamic acid-based chelating agent to the waste water, adsorbing dioxins in the second reaction tank 3 by adding powdery activated carbon to the waste water treated in the tank 1, reducing and insolubilizing Cr, Se and As in the third reaction tank 4 by adding ferrous salt to the waste water treated in the tank 3, carrying out flocculation treatment in a flocculation reaction tank 5 by adding inorganic and organic flocculants to the waste water treated in the tank 4, separating the treated water by using a flocculating and settling tank 6 and a filter 11 and reusing the treated water thus separated as high-pressure water.

26. 发明专利

JP2000234895A TEMPORARY WATER STOPPING JIG OF PIPE SEAT FOR WATER FLOWPIPE, METHOD FOR FIXING CHANNEL MEMBER REMOVABLY TO PIPE SEAT USING IT, AND SCREEN CLEANING METHOD FOR COLLECTING PIPE OF SPONGE BALL FOR CLEANING THIN PIPE IN SEA WATER COOLED CONDENSER 失效
公开(公告)号：JP2000234895A
公开(公告)日：2000-08-29
申请号：JP3397999
申请日：1999-02-12
申请人： KANSAI ELECTRIC POWER CO , KANDEN KOGYO INC , KURITA ENG CO LTD
发明人： FUJITA HIROYUKI , NISHIKAWA YOSHITO , NAGAI KATSUHIRO , FUJIMOTO MASAHIRO , SAITO YUKIHISA , IKEBE YOSHINORI , ARAKI YASUHIRO , MIKI HISASHI , SATO YASUMASA
IPC分类号： B08B9/04 , F16K43/00 , F16L55/18 , F28G1/12
摘要： PROBLEM TO BE SOLVED: To facilitate fixing and removal of a temporary water stop jig for closing the pipe seat of a water flow pipe temporarily in order to supply a cleaning sponge ball into the pipe or collect the ball therefrom by forming the jig of a planar body having a large diameter semicircular part of same diameter as the flange part and a small diameter semicircular part for closing the opening of the pipe seat. SOLUTION: A temporary water stop jig comprises a planar body 31 made of a steel plate having a large diameter semicircular part 32 of same diameter as the flange 2 at a pipe seat F provided integrally with a water flow pipe 1, and a small diameter semicircular part 33 which can close half circumference of the opening of the pipe seat F. Three internally threaded holes 34 and two internally threaded semicircular parts 35 are formed on the circumferential edge of the large diameter semicircular part 32 in same arrangement as a plurality of bolt holes made in the flange 2, or the like. When the jig is used, upper five bots and nuts out of eight bots and nuts 7 jointing the flanges 2, 4 are removed and the jig is inserted between the flanges 2, 4 from above and then the opening of the pipe seat F is choked with the small diameter semicircular part 33. Finally, the removed bots and nuts 7 are tightened to close the pipe seat F.

27. 发明专利

JP2000105295A CHEMICAL DECONTAMINATION METHOD AND ITS APPARATUS 失效
公开(公告)号：JP2000105295A
公开(公告)日：2000-04-11
申请号：JP27412898
申请日：1998-09-29
申请人： HITACHI LTD , KURITA ENG CO LTD
发明人： NAGASE MAKOTO , UETAKE NAOTO , ISHIDA KAZUNARI , NAKAMURA FUMITO , ANAZAWA KAZUMI , TAMAGAWA TADASHI , YOSHIKAWA HIROO
IPC分类号： G21F9/28 , G21F9/00
摘要： PROBLEM TO BE SOLVED: To provide a chemical decontamination method using a chemical decontamination agent decomposition device for selectively decomposing a component which burdens a cation resin tower and to provide a chemical decontamination method mitigating corrosion to a material and a facility for chemical decontamination, which uses a chemical decomposition agent decomposing device capable of decomposing not only a component captured in the cation resin tower but a component captured in an anion exchange resin at the same time by using the decomposing device. SOLUTION: According to this chemical decontamination method for chemically removing radioactive nuclear species from the metal member surface contaminated with the radioactive nuclear species, after the end of a reducing decontamination process using a reducing decontamination agent containing at least two kinds of components, a decontamination agent is decomposed by a decomposing device for decomposing at least two kinds of chemical substances of the reducing decomposing material.

28. 发明专利

JP2000056087A CHEMICAL DECONTAMINATING METHOD AND DEVICE THEREFOR 失效
公开(公告)号：JP2000056087A
公开(公告)日：2000-02-25
申请号：JP22262698
申请日：1998-08-06
申请人： HITACHI LTD , KURITA ENG CO LTD , KURITA WATER IND LTD
发明人： NAGASE MAKOTO , NAKAMURA FUMITO , ANAZAWA KAZUMI , YOSHIKAWA HIROO , FURUKAWA SEIJI
IPC分类号： G21C19/307 , G21F9/28
摘要： PROBLEM TO BE SOLVED: To make the water in the outlet of a resin tower satisfy a drainable quality condition and simultaneously attain the reduction in concentration of a decontaminating agent and the regulation of water level by decomposing a reductive decontaminating agent guided from a part to be intended and passing water to a mix bed resin tower. SOLUTION: In decontamination process, a reactor recirculating pump 3 is started, and the temperature is raised by use of a circulating pump 5 and a heater 6. When the temperature reaches a prescribed temperature (90±5 deg.C), oxalic acid as reductive decontaminating agent any hydrazine as pH regulating agent are injected from a chemical tank 26 to a reactor 1 by use of a chemical injection pump 27. When the oxalic acid concentration reaches a prescribed concentration (0.2%), the chemical injection pump 27 is stopped to end the injection of oxalic acid, and reductive decontamination is performed. The cracked gas generated in a reducing agent decomposing device 16 is separated in a surge tank 17 and returned to the reactor 1 through a degassing line 24. Since most of oxalic acid of the decontaminating solution flowing from the tank 17 is decomposed, the decontaminating solution is cooled to 80 deg.C or lower by a cooler 18 and then guided to a mix bed ion exchange resin 19 to remove the undecomposed oxalic acid, metal ions and the like.

29. 发明专利

JPH11347535A METHOD FOR TREATING DRAINAGE CONTAINING AMMONIA 失效
公开(公告)号：JPH11347535A
公开(公告)日：1999-12-21
申请号：JP15603298
申请日：1998-06-04
申请人： TOKYO ELECTRIC POWER CO , KURITA ENG CO LTD
发明人： UCHIDA TAKASHI , KUMAKURA TOMOE , AKIMOTO NOBUYUKI , TAKESHITA MASANORI , KIYOTAKI KAZUHIRO , KOIKE KAZUE
IPC分类号： B01D19/00 , B01D53/86 , B01J23/889 , C02F1/20
摘要： PROBLEM TO BE SOLVED: To separate/decompose ammonia in drainage containing ammonia by a method in which the drainage is stripped by spraying into a spray tank at a specified pressure to be separated into ammonia gas and water, and the separated ammonia gas is decomposed catalytically to obtain nitrogen and water. SOLUTION: In the treatment of drainage containing ammonia, the drainage in a raw water tank 1 is passed through a reverse osmosis membrane separator 2, the filtrate is supplied to a treated water tank 3, while the concentrated water is circulated to the raw water tank 1 in order to increase the ammonia concentration of the drainage. The drainage with an increased ammonia concentration is pressurized by a high pressure pump 4 and sprayed at 100 kg/cm or above into a spray tank 5 to be separated into ammonia gas and treated water. The treated water after the separation of ammonia is drawn out from the bottom part of the spray tank 1 and returned the raw water tank 1, and the circulation is performed until the ammonia concentration of the treated water reaches a prescribed concentration.

30. 发明专利

JPH11141804A METHOD OF CHEMICALLY CLEANING BOILER 失效
公开(公告)号：JPH11141804A
公开(公告)日：1999-05-28
申请号：JP30430197
申请日：1997-11-06
申请人： KURITA ENG CO LTD
发明人： FUKUMOTO TOSHIHARU
IPC分类号： B08B9/08 , B08B3/08 , C23G3/00 , F22B37/52 , F28G9/00
摘要： PROBLEM TO BE SOLVED: To provide a chemical cleaning method which raises the temperature by recovering heat from cleaning waste fluid, and shortens the extrusion washing process and also lessens the calorific value required for the heating in the next process, by raising the extrusion washing efficiency hereby, and besides can lessen the quantity of cooling water and also can lessen the capacity of storage of waste fluid, by lowering the temperature of the cleaning waste fluid, and can make the cleaning efficient by making the cooling by FDF needless hereby shortening the cleaning time. SOLUTION: Chemical cleaning liquid is led in a boiler 1 through a valve V2 by a pump 2, and it is circulated through valves V3 and V1 so as to perform chemical cleaning, and after finish of cleaning, cleaning water is passed through a valve V5 from a water supply path 7, and it is heated with a heat exchanger 11 and is poured into the boiler, and the cleaning liquid is pushed out for cleaning, and the cleaning waste fluid is cooled with the heat exchanger 11 from a valve V6 and is let flow in a waste fluid tank.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式