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1. 发明专利

JP2004293478A Performance diagnosing system for power generation plant 有权
公开(公告)号：JP2004293478A
公开(公告)日：2004-10-21
申请号：JP2003088948
申请日：2003-03-27
申请人： Hitachi Eng Co Ltd , Hitachi Ltd , 日立エンジニアリング株式会社 , 株式会社日立製作所
发明人： SATO RYOSUKE , NEMOTO SEIJI
IPC分类号： F01D25/00 , F01K13/00
摘要： PROBLEM TO BE SOLVED: To provide a performance diagnosing system for a power generation plant capable of determining the turbine efficiency on the basis of the process data without determining wetness.
SOLUTION: The performance diagnosing system for the power generation plant includes a steam line to lead the saturated steam fed from a nuclear reactor 32 to a condenser 40 through a high-pressure steam turbine 34 and a low-pressure steam turbine 38 and a water supply line to supply the water from the condenser 40 to the nuclear reactor 32 through low-pressure water heaters 44 and 48, the two lines being composed of respective elements, and on the basis of the pro-com. data concerning the conditions of these elements, the heat balance computation for the steam line and the water supply line is executed by a heat balance calculation processing means 4 using the thermal output of the reactor 32 as reference. The heat quantity of the whole system including the steam line and the water supply line is determined and multiplied by the turbine efficiency stored in a design data storing means 9 to calculate the output of a power generator, and the output of the power generator given through the computation is compared with the actual generator output by a turbine efficiency calculation processing means 5, and if the obtained deviation lies within the allowable range, the turbine efficiency is taken as an acceptable value, and otherwise the turbine efficiency is updated, followed by a heat balance calculation and a turbine efficiency calculation until the deviation gets in the allowable range.
COPYRIGHT: (C)2005,JPO&NCIPI

2. 发明专利

JPH01191097A OXYGEN INJECTOR 失效
公开(公告)号：JPH01191097A
公开(公告)日：1989-08-01
申请号：JP1442688
申请日：1988-01-27
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： NEMOTO SEIJI , TAMURA YUHEI
IPC分类号： G21D3/08
摘要： PURPOSE:To effectively utilize the oxygen stored in an oxygen supply source by enabling oxygen injection by suction of a water ejection using the driving water of the pressure higher than an injection point even if the pressure of the oxygen supply source is lower then the pressure at the injection point. CONSTITUTION:The condensate from a discharge pipe 10 of a high-pressure condensate pump is supplied as the driving water of the water ejector 16 and the driving water pressure to assure the suction performance of the water ejector is regulated constant by a regulating valve 15. The oxygen supplied from the oxygen supply source 18 is regulated in flow rate by a regulating valve 15 and is supplied to the suction side of the water ejector 16. The oxygen sucked into the ejector 16 is mixed with the driving water and is supplied via a water release pipe 17 of the water ejector to an outlet pipe 7 of a condensate filter to increase the concn. of the dissolved oxygen in the condensate and feed water on the downstream of the outlet pipe 7, by which the prescribed concn. is assured.

3. 发明专利

JPS5798837A SAMPLE PICK UP SYSTEM 失效
公开(公告)号：JPS5798837A
公开(公告)日：1982-06-19
申请号：JP17450580
申请日：1980-12-12
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： NEMOTO SEIJI , TAMURA YUUHEI
IPC分类号： F01K13/00 , G01N1/00 , G01N1/02 , G01N1/22
摘要： PURPOSE:To pick up samples stably and continuously from a negative pressure part and to return the exhausted sample to a plant system by connecting the pipe, which is connected to the negative pressure part of a steam turbine power plant, to the pickup piping system provided with a sample recovery part whose pressure is further lower. CONSTITUTION:The vapor extracted from the turbine through a condenser 10 and an air extractor 17 is processed by an intermediate cooler 12, a low pressure side water supply heater 16 and the like in cascade mode, and recovered to the condenser 10. Drain containing most of insoluble solid materials flows into a drain pipe 19 which is connected to the heater 16 that forms a vacuum part whose pressure is negative with respect to the atomospheric pressure. A sample analyzer 22, which is connected to a drain pipe 24 of the extractor 17 whose pressure is further lower, is provided at a sample pick up pipe 20 which is connected with said pipe 19. The drain sample from the pipe 19 is picked up stably and continuously from the negative pressure part by the pressure difference regardless of a gaseous phase or a liquid phase. Furthermore, the exhausted sample from the device 22 concurrently flows into a drain pipe 18 by the pressure difference and is recovered to the condenser 10 in the plant system. Thus the excellent and positive sample pick up process is performed.

4. 发明专利

JP2002071874A BOILING WATER TYPE NUCLEAR POWER GENERATION PLANT, AND METHOD FOR MEASURING POLYMER IMPURITY OF DEGRADED ION EXCHANGE RESIN 失效
公开(公告)号：JP2002071874A
公开(公告)日：2002-03-12
申请号：JP2000257512
申请日：2000-08-28
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： AIZAWA MOTOHIRO , USUI NAOSHI , NEMOTO SEIJI , ASAKURA YAMATO
IPC分类号： G01N33/44 , B01J47/00 , C02F1/42 , G01N30/00 , G01N30/96 , G21C17/02 , G21C19/307 , G21D1/02
摘要： PROBLEM TO BE SOLVED: To determine the degree of degradation of the ion exchange resin of a condensate polisher with excellent accuracy before the temperature of cooling water of a condenser rises. SOLUTION: The condensate temperature is temporary adjusted to the summer time temperature by reducing the opening of an air inlet valve 24 of an air ejector of the condenser before the summer time starts. After the condensate temperature is adjusted, reactor water is sampled after the predetermined time is elapsed, and the concentration of impurities in the reactor water is measured.

5. 发明专利

JP2000039295A CLEANER FOR CONDENSER COOLING PIPE 失效
公开(公告)号：JP2000039295A
公开(公告)日：2000-02-08
申请号：JP20470098
申请日：1998-07-21
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KUBOTA SHOZO , NEMOTO SEIJI
IPC分类号： F28G1/12
摘要： PROBLEM TO BE SOLVED: To prevent a duct from being choked through adhesion and growth of a marine organism by providing a function for conducting sea water constantly through the entire apparatus even when ball cleaning operation is not performed. SOLUTION: A ball separator 10 is disposed between ball circulation pumps 2A, 2B and change-over valves 3A-3C. The ball separator 10 has a grid not passing a ball and the ball and the ball flows out to a ball outlet together with sea water and only sea water flows out through a sea water outlet. At the time of cleaning operation of a condenser 7A, the change-over valve 3a conducts between the ball inlet side and the ball collector 4A side whereas change-over valves 3B, 3C conduct, respectively, between the sea water inlet side and the ball collectors 4B or 4C. Consequently, the ball circulates through a duct leading to the condenser 7A and only sea water flows into condensers 7B, 7C. Since sea water does not stand at any part, the duct is prevented from being choked through adhesion and growth of a marine organism.

6. 发明专利

JPS61171809A OPERATION OF COOLING WATER SYSTEM FOR POWER PLANT 失效
公开(公告)号：JPS61171809A
公开(公告)日：1986-08-02
申请号：JP1091485
申请日：1985-01-25
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： NEMOTO SEIJI , AKATSU JUNICHI
IPC分类号： F01K13/02 , F01P7/16
摘要： PURPOSE:To reduce the operating number of cooling water pump thus to reduce the power by closing the closed nozzle arranged at the common confluence of cooling water feeding or returning conduit under stoppage of plant. CONSTITUTION:The cooling water fed through a cooling water pump 1 is cooled through a heat-exchanger 2 to be cooled then fed through a closed nozzle 30 and a small bypass valve 31 to a machine to be cooled 6. Furthermore, it is returned through a return tube 14 and a return bus tube 16 to said pump 1. Under stoppage of plant, said nozzle 30 is closed while said valve 31 is opened to feed small cooling water flow to the machine group 6. In such a manner, the power is reduced by reducing the operating number of cooling water pump.

7. 发明专利

JPH05203789A LOW LOAD PURIFICATION SYSTEM 失效
公开(公告)号：JPH05203789A
公开(公告)日：1993-08-10
申请号：JP1011792
申请日：1992-01-23
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： FUKUMOTO TOSHIHIKO , IGARASHI HIROO , MARUO MASAHIRO , NEMOTO SEIJI , USUI NAOSHI
IPC分类号： G21C19/307
摘要： PURPOSE:To suppress dissolution of a carbonoxide into water in a system and to diminish carbonoxide load to ion exchange resin of a condesate demineralizer as well as to suppress corrosion inside the system, regarding to circulation/ holding operation of condensate feeding during plant shut-down of a boiling water nuclear reactor plant. CONSTITUTION:In circulation/holding operation of condensate feeding where a small capacity pump 3 is used, a hot well bypass piping 15 is provided to conduct circulation operation through the hot well bypass, and a low pressure condensate pump 2 and a high pressure condensate pump 9 are used for that. Also, the hot well bypass piping 15 and a heat exchanger 19 as well are provided to conduct circulation operation through the hot well bypass.

8. 发明专利

JPS59229182A CONDENSING SYSTEM 失效
公开(公告)号：JPS59229182A
公开(公告)日：1984-12-22
申请号：JP10264883
申请日：1983-06-10
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： NEMOTO SEIJI , NAGAI HIROTSUGU , ISHIMARU HITOSHI , MASUDA TOYOHIKO
IPC分类号： F22D11/00 , F28B9/00 , F28B9/08
摘要： PURPOSE:To eliminate an impact pressure due to refilling of water into a cavity and to obtain a stable flow by providing a pipe arrangement configuration in which the downstream side of a valve for recovering high-temperature and high-pressure water to a low pressure vessel is kept at fully-filled up with water, in a condensing system in which high-temperature and high-pressure water is recovered to the low-pressure vessel. CONSTITUTION:A valve 2 and a spray nozzle 5 for exhausting high-temperature and high pressure, are provided at the intermediate of a pipeline connecting a pipeline 1 which circulates therethrough high-temperature and high-pressure water, and an apparatus, in a condensing system of a power plant, to a vessel 6 having a pressure which is lower than that of the apparatus. The lower end of the spray nozzle hole is disposed on a level higher than the upper end of the pipeline 3 whereby it is possible to fill the interior of the pipeline 3 with water in a closed state of the valve 2. That is, after the valve 2 is opened at an opening degree at which water can flow in a quantity required by the valve 2, the inside of the pipeline 3 is in a standby state by the filled water. Hence, water at the upstream side pushes the water filled part at the downstream side and is blown out of the nozzle 5. Since the inside of the pipeline 3 does not form a cavity at the intermediate of the pipeline, the impact pressure at the time of the cavity being filled with water can be repulsed.

9. 发明专利

JPS58219985A Apparatus for desalting condensed water 失效
标题翻译：用于冷凝水的设备
公开(公告)号：JPS58219985A
公开(公告)日：1983-12-21
申请号：JP10065082
申请日：1982-06-14
申请人： Hitachi Eng Co Ltd , Hitachi Ltd
发明人： NEMOTO SEIJI , TAMURA YUUHEI
IPC分类号： C02F1/42
摘要： PURPOSE: To prevent the diffusion of fine particles to a system, by a method wherein a pipeline connected to a condenser from a recirculation pump is provided with a means for controlling the flow amount of said pipeline and the concn. of dissolved oxygen at the outlet of a condensed water desalting apparatus is controlled to a limit value or less by the mixing dilution with condensed water.
CONSTITUTION: The suction side of a recirculation pump 18 is connected to the outlet side pipelines 14a, 14b of desalting towers 12a, 12b and the emitting side of the recirculation pump 18 is connected to a condensed water pipe 11 from a condenser. This condensed water pipe 11 is connected to the inlet side pipelines 11a, 11b of the desalting towers 12a, 12b to constitute a recirculation system and opening and closing valves 13a, 13b are provided to said pipelines 11a, 11b. In addition, a small diameter bypass pipe 22 is provided to a pipeline 20 connected to the condensed water pipe 11 from the recirculation pump 18 and a flow control valve 23 is provided to the bypass pipe 22 and a dissolved oxygen measuring apparatus 26 is provided to a condensed water pipe 25.
COPYRIGHT: (C)1983,JPO&Japio
摘要翻译：目的：为了防止细颗粒扩散到系统，通过一种方法，其中连接到来自再循环泵的冷凝器的管道设置有用于控制所述管道和所述管道的流量的装置。在冷凝水脱盐装置的出口处的溶解氧的浓度通过混合稀释与冷凝水控制在极限值以下。构成：再循环泵18的吸入侧连接到脱盐塔12a，12b的出口侧管道14a，14b，再循环泵18的出口侧从冷凝器连接到冷凝水管11。该冷凝水管11与脱盐塔12a，12b的入口侧管道11a，11b连接，构成再循环系统，在管路11a，11b上设有开关阀13a，13b。另外，从再循环泵18向与冷凝水管11连接的管路20设置小径旁通管22，向旁通管22设置流量调节阀23，将溶解氧测定装置26设置于冷凝水管25。

10. 发明专利

JPH10220206A BALL WASHING APPARATUS FOR CONDENSER AND OPERATING METHOD THEREOF 失效
公开(公告)号：JPH10220206A
公开(公告)日：1998-08-18
申请号：JP2471997
申请日：1997-02-07
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： NEMOTO SEIJI , ASANO ASAO
IPC分类号： F01K9/00 , F28B9/08 , F28G1/12
摘要： PROBLEM TO BE SOLVED: To reduce the number of ball collecting devices of a washing apparatus for condensers and the arrangement space therefor. SOLUTION: Outlet base pipes 7a, 7b of cooling water used commonly for 3 bodies A, B, and C of a condenser 1 are provided with ball collecting devices 9a, 9b. In the case of the washing operation of body A, sponge balls used for washing are collected at the ball collecting devices 9a, 9b kept in a state of collection, taken out from the ball collecting devices by ball circulating pumps 11a, 11b, and circulated after their jointing from the pumps to an A system by a flow channel changeover device 15. A ball recovery device 12A passes through balls to a ball pouring pipe 13 at the time of washing and catch them at the time of recovery. Balls passed through as above are divided into two pouring pipes 13-1, 2 and poured into an inlet pipe for cooling water 5-1 of a water chamber 4-1 and an inlet pipe for cooling water 5-2 of a water chamber 4-2. Balls having washed cooling pipes in a water chamber 4 are gathered in one as a group having the same direction of the flow in an outlet pipe for cooling water 6 and returned to the outlet base pipes for cooling water 7a, 7b.

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