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1. 发明专利

JPS61242683A METHOD AND DEVICE FOR DEAERATING FEED WATER 失效
公开(公告)号：JPS61242683A
公开(公告)日：1986-10-28
申请号：JP8268185
申请日：1985-04-19
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： NAKAMURA YASUAKI , URA KATSUMI , OSHIMA YOSHIKUNI
IPC分类号： C02F1/20 , B01D19/00
摘要： PURPOSE:To reduce effectively oxygen dissolved in feed water by effectively warming the feed water to be sent to a daerator with auxiliary steam and evacuating the inside of the deaerator with a deaerator vent system. CONSTITUTION:The lower end part of a feed water communicative pipe 10 for communicating a deaeration chamber 1 with a water storage tank 12 is led below the water surface in the water storage tank 12, (a) a vent pipe 14 provided with an orifice 14a and a stop valve 15 for the vent pipe and (b) a start-up vent pipe 16 furnished with a stop valve 17 for the vent pipe are arranged in parallel between the deaeration chamber 1 and a condenser and a pipe 18 for supplying heated steam to the deaeration chamber 1 is provided. The feed water deaeration device is used for heating the feed water to a boiler. When the boiler is started, the valve 17 is opened and a part of heated steam is introduced into the water storage tank 12. Consequently, time necessary for deaeration and cleanup at startup can be reduced, the amt. of auxiliary steam is saved and the cost of in-plant boiler equipment can be reduced.

2. 发明专利

JPH06126270A FEED WATER DEAERATOR 失效
公开(公告)号：JPH06126270A
公开(公告)日：1994-05-10
申请号：JP11473193
申请日：1993-05-17
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： NAKAMURA YASUAKI , URA KATSUMI , OSHIMA YOSHIKUNI
IPC分类号： B01D19/00 , C02F1/20
摘要： PURPOSE:To improve the reliability and durability of a plant by shortening the deaeration time on plant startup, simultaneously saving the quantity of auxiliary steam and improving the quality of feed water. CONSTITUTION:Steam jet nozzles 22 are installed under the surface of the water in a water storage tank 12. Not only a pipe 18 for feeding heating steam to a deaerating chamber 1 but also a pipe 20 for feeding the heating steam to the nozzles 22 are provided. The deaerating chamber 1 and a condenser are connected by a starting vent pipe 16. On boiler startup, a valve 19 is opened and simultaneously a valve 21 is opened to jet and feed heating steam into feed water in the water storage tank 12 and further a valve 17 installed at some midpoint in the starting vent pipe 16 is opened to evacuate the feed water deaerator.

3. 发明专利

JPS61171804A VALVE GLAND LEAK COLLECTION DEVICE 失效
公开(公告)号：JPS61171804A
公开(公告)日：1986-08-02
申请号：JP1091585
申请日：1985-01-25
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： MARUO MASAHIRO , NAGAI HIROTSUGU , AKATSU JUNICHI , MASUDA TOYOHIKO , OSHIMA YOSHIKUNI , IMAZU SHUICHI
IPC分类号： F01D11/00 , F01K7/44
摘要： PURPOSE:To enable continuous operation under leak by leading the fluid leaked from the gland section of valve to the drum side of low pressure water supply heater then cooling and collecting. CONSTITUTION:Leaked fluid from the gland section of valve 2 is led through a lead-off bus tube 7 to the drum side of low pressure water supply heater 20. Said heater 20 is coupled with a heated steam extraction tube 26 and an inlet piping 22. The heat-exchange capacity of said heater 20 is enormous against the leak from the valve gland section thus to collect the leaked fluid sufficiently and to enable continuous operation even upon occurrence of leakage.

4. 发明专利

JPH03175103A STEAM TURBINE EQUIPMENT, METHOD FOR SUPPLYING STEAM THERETO, POWER PLANT AND COMBINED PLANT 失效
公开(公告)号：JPH03175103A
公开(公告)日：1991-07-30
申请号：JP31598689
申请日：1989-12-05
申请人： HITACHI LTD
发明人： TAKEDA TAIJI , OSHIMA YOSHIKUNI
IPC分类号： F01D11/06 , F01D15/10 , F01K9/00 , F01K23/10
摘要： PURPOSE:To simplify steam turbine equipment so as to reduce the manufacturing cost of the equipment by supplying steam into both a packing portion and condensate after adjusting the temperature of the steam using a temperature adjusting means. CONSTITUTION:Steam from a steam source is directed to a desuperheater 22 through auxiliary steam piping 21. The flow of spray water is adjusted by a spray water flow adjusting valve 23 and the temperature of steam flowing out from the desuperheater 22 is adjusted to within the permissible temperature of packing portions 28, 29. After adjusting the temperature the steam has its pressure adjusted by a supplied steam adjusting valve 24 and a released steam adjusting valve 33 and is supplied to the packing portions 28, 29 via sealing piping 26, 27 and is also injected as deaerating steam from a steam injection nozzle 43 via steam releasing piping 103 into condensate contained in a condensate portion 5. The equipment of the grand sealing system is thus partially combined with that of the dearating system so that the equipment is simplified to reduce the manufacturing cost of the equipment.

5. 发明专利

JPS61187909A FOREIGN MATTER REMOVING DEVICE 失效
公开(公告)号：JPS61187909A
公开(公告)日：1986-08-21
申请号：JP2630485
申请日：1985-02-15
申请人： HITACHI LTD
发明人： OTAKE KATSUMOTO , OSHIMA YOSHIKUNI
IPC分类号： B01D35/02 , B01D37/04
摘要： PURPOSE:To capture and remove marine livings contained in cooling sea water as foreign matters securely by sensing pressure difference before and behind a screen and operating a backwashing valve, discharging valve, and a screen automatically. CONSTITUTION:Capture and removal of foreign matters 50 such as marine livings from cooling sea water line is executed by arranging screen 12, 13 to form a V shape, and a separating plate 16, overflow plates 17, 18, and discharging pipes 19, 20 to the center of a casing. The pressure difference generated by the sticking of foreign matters to the screens 12, 13 is sensed by a differential pressure gauge to discriminate necessity for washing operation from emergency operation, operating thus the backwashing valve 14, 15, discharging valve 21, 22, or screen 12, 13 automatically. Thus, foreign matters 50 are removed by backwashing and discharged.

6. 发明专利

JPH04106394A CONDENSER FOR STEAM TURBINE 失效
公开(公告)号：JPH04106394A
公开(公告)日：1992-04-08
申请号：JP22446290
申请日：1990-08-28
申请人： HITACHI LTD
发明人： HORIBE YOSHUN , SUMIYA YOSHIO , OSHIMA YOSHIKUNI
IPC分类号： F28B9/08
摘要： PURPOSE:To provide a condensed water descending pipe with the function of a pressure equalizing pipe and reduce the number of isolating valves by a method wherein the condensed water descending pipe, having an outlet opening above the water level of a hot well is provided in order to form two flow passages of non-condensable gas or deaerating excessive steam, ascending toward a condensing part through the central part of the pipe. CONSTITUTION:The flowing condition of a condensed water descending pipe 6 is different remarkably depending on the operating condition of a condenser and principal flow upon starting is ascending flow of excessive deaerating steam, introduced by a deaerating heater 9 and flowing from a hot well 4 into a water condensing part 3, while the flow upon normal operation is the descending flow of condensed water of the exhaust steam of a turbine, which flows from the water condensing part 3 toward the hot well 4. The superposing condition of these ascending flow and descending flow under the maximum flow rate conditions of respective flows can not be generated when a condenser is operated. The size of the condensed water descending pipe 6 is determined considering the flow conditions of both of the flows while the outlet port thereof is provided above the water level of the hot well 4 considering the ascending flow of excessive steam upon starting the operation of the condenser. The functions of a condensed water descending pipe and a pressure equalizing pipe can be realized by only the condensed water descending pipe 6 and the reduction of the number of isolating valves becomes possible.

7. 发明专利

JPS6254061A LOW C-CR-MO STEEL USED UNDER DAMP STEAM 失效
公开(公告)号：JPS6254061A
公开(公告)日：1987-03-09
申请号：JP7755386
申请日：1986-04-05
申请人： HITACHI LTD , KAWASAKI STEEL CO
发明人： HATAYA FUMIO , IZUMITANI MASAKIYO , OSHIMA YOSHIKUNI , AKUTSU KOICHI , UEDA SHUZO , ISHIKAWA MASAAKI , KUSUHARA YUJI , SHIRAISHI IWAO
IPC分类号： C22C38/00 , C22C38/24
摘要： PURPOSE:To obtain the titled economical steel excellent in EC resistance, weldability, strength and toughness by specifying a composition consisting of C, Si, Mn, Cr, Mo, Al, V and Fe. CONSTITUTION:A low C-Cr-Mo steel has a composition consisting of, by weight, 0.02-0.14% C, 0.45-0.90% Si, 0.30-0.80% Mn, 0.70-1.60% Cr, 0.40-0.70% Mo, 0.005-0.08% Al, 0.005-0.08% V and the balance essentially Fe except inevitable impurities, which shows excellent EC resistance and weldability when used under damp steam. The steel having the above properties can be obtained by subjecting a steel refined into the above composition on rolling or forging by the ordinary method and then to normalizing and successive tempering or to annealing.

8. 发明专利

JPS627904A ELECTRIC POWER PLANT SYSTEM 失效
公开(公告)号：JPS627904A
公开(公告)日：1987-01-14
申请号：JP14248085
申请日：1985-07-01
申请人： HITACHI LTD
发明人： HORIBE YOSHUN , OSHIMA YOSHIKUNI , NAGAI HIROTSUGU , OSUMI KATSUMI
IPC分类号： F01K7/40 , F01K7/22
摘要： PURPOSE:To avoid using highly moist steam which is a factor in pipe corrosion, so as to enable economical carbon steel to be used by building a system in order to use reheated steam drawn out immediately from the way-out of a reheater as a source of heated steam supply of a water supply heater. CONSTITUTION:In the case of a reheating-type atomic power plant, highly moist steam which makes work in a high pressure turbin 2, is made free from moisture through a moisture separator 3, then reheated by the first-step and the second-step reheaters 12a, 12b, and flows into a low pressure turbine 4. Then, the air drawn out of the high pressure turbine 2 is supplied as heating steam 14b for a high pressure water supply heater 11b, and so is super-heated steam in the way-out of the second-step reheater 12b as heating steam 14a for a high pressure water supply heater 11a. Similarly, the air drawn out of a low pressure turbine 4 is supplied as heating steam 13a-13d for low pressure water supply heaters 9a-9d. Factors in pipe corrosion are excluded by the above mechanism, and carbon steel can be used for piping and the cost of equipment can be reduced.

9. 发明专利

JPS625003A DRAIN TANK 失效
公开(公告)号：JPS625003A
公开(公告)日：1987-01-12
申请号：JP14247385
申请日：1985-07-01
申请人： HITACHI LTD
发明人： OTAKE KATSUMOTO , OSHIMA YOSHIKUNI
IPC分类号： F22D1/30 , F22D1/28

10. 发明专利

JPS61217603A MOVING AND HOLDING DEVICE FOR WORKING ROBOT IN WATER CHAMBER FOR HEAT EXCHANGER 失效
公开(公告)号：JPS61217603A
公开(公告)日：1986-09-27
申请号：JP5617185
申请日：1985-03-22
申请人： HITACHI LTD
发明人： FUJITANI YASUO , OTAKE KATSUMOTO , OSHIMA YOSHIKUNI , IDEUMI SHIGERU
IPC分类号： F22B37/02 , B25J5/00 , B62D57/024 , B62D57/032 , F22B37/00 , F28F11/00 , F28G15/04

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