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1. 发明专利

CA2588879A1 STEAM TURBINE PLANT 未知
公开(公告)号：CA2588879A1
公开(公告)日：2007-11-18
申请号：CA2588879
申请日：2007-05-16
申请人： HITACHI LTD
发明人： ONUMA MASANORI , KOIZUMI NAOTO
IPC分类号： F01K7/38 , F01D17/02
摘要： The steam turbine plant includes an extraction system 3 (3a, 3b) which extracts a portion of main steam from an intermediate stage of a steam turbine 1 and delivers the extracted steam to a demander 8 and a steam extraction control system 7 for controlling the steam extraction. The extraction system includes an extraction steam flowmeter 5 (5a, 5b) and an extraction steam stop valve 6 (6a, 6b). The control system can set a warning flow and an extracted steam stop flow as restrictive flow values with respect to a flow of the extracted steam. When an extracted steam flow measurement value from the flowmeter reaches the warning flow, a warning is issued and after a lapse of a predetermined time period the stop valve is brought into a fixed open state for restriction of the extracted steam flow. When in the restriction state the extracted steam flow is further increased and the extracted steam flow measurement value reaches the extracted steam stop flow, the stop valve is fully closed for stoppage of steam extraction. With such features, a steam turbine plant can exercise extraction control capable of stably supplying extracted steam while it is primarily intended that the turbine can continuously be operated by avoiding occurrence of the turbine trip due to steam extraction even if it is not equipped with ahigh- performance and expensive valve device such as an extraction steam control valve and adopts high-pressure steam condition.

2. 发明专利

DE69127564T2 未知
公开(公告)号：DE69127564T2
公开(公告)日：1998-04-23
申请号：DE69127564
申请日：1991-03-07
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KOIZUMI NAOTO , ASAO TAKASHI , HOIZUMI SHINICHI , NOGUCHI YOSHIKI , SASAKI TOSHIHIKO
IPC分类号： F01K23/06 , F02C3/20
摘要： A pressurized fluidized bed combustion combined cycle power plant has a gas turbine unit of single spindle type in which a turbine (2) driven by combustion gas from burning of coal in a pressurized fluidized bed combustion boiler (4) drives an electrical generator (3) at constant speed and drives a compressor (1) supplying compressed combustion air to the boiler (4). To permit partial load running, control means are provided to effect, in dependence on an operating load of the boiler, control of at least one of (a) the flow rate of said combustion air into said boiler, and (b) the operating pressure in said combustion chamber of said boiler. The control means may be for example a valve (19) controlling a by-pass flow of the combustion air and/or inlet guide vanes (20) of the compressor (1).

3. 发明专利

CA2588879C STEAM TURBINE PLANT 未知
公开(公告)号：CA2588879C
公开(公告)日：2009-07-21
申请号：CA2588879
申请日：2007-05-16
申请人： HITACHI LTD
发明人： KOIZUMI NAOTO , ONUMA MASANORI
IPC分类号： F01K7/38 , F01D17/02
摘要： The steam turbine plant includes an extraction system 3 (3a, 3b) which extracts a portion of main steam from an intermediate stage of a steam turbine 1 and delivers the extracted steam to a demander 8 and a steam extraction control system 7 for controlling the steam extraction. The extraction system includes an extraction steam flowmeter 5 (5a, 5b) and an extraction steam stop valve 6 (6a, 6b). The control system can set a warning flow and an extracted steam stop flow as restrictive flow values with respect to a flow of the extracted steam. When an extracted steam flow measurement value from the flowmeter reaches the warning flow, a warning is issued and after a lapse of a predetermined time period the stop valve is brought into a fixed open state for restriction of the extracted steam flow. When in the restriction state the extracted steam flow is further increased and the extracted steam flow measurement value reaches the extracted steam stop flow, the stop valve is fully closed for stoppage of steam extraction. With such features, a steam turbine plant can exercise extraction control capable of stably supplying extracted steam while it is primarily intended that the turbine can continuously be operated by avoiding occurrence of the turbine trip due to steam extraction even if it is not equipped with ahigh- performance and expensive valve device such as an extraction steam control valve and adopts high-pressure steam condition.

4. 发明专利

DE69127564D1 未知
公开(公告)号：DE69127564D1
公开(公告)日：1997-10-16
申请号：DE69127564
申请日：1991-03-07
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KOIZUMI NAOTO , ASAO TAKASHI , HOIZUMI SHINICHI , NOGUCHI YOSHIKI , SASAKI TOSHIHIKO
IPC分类号： F01K23/06 , F02C3/20
摘要： A pressurized fluidized bed combustion combined cycle power plant has a gas turbine unit of single spindle type in which a turbine (2) driven by combustion gas from burning of coal in a pressurized fluidized bed combustion boiler (4) drives an electrical generator (3) at constant speed and drives a compressor (1) supplying compressed combustion air to the boiler (4). To permit partial load running, control means are provided to effect, in dependence on an operating load of the boiler, control of at least one of (a) the flow rate of said combustion air into said boiler, and (b) the operating pressure in said combustion chamber of said boiler. The control means may be for example a valve (19) controlling a by-pass flow of the combustion air and/or inlet guide vanes (20) of the compressor (1).

5. 发明专利

JPH03279602A PRESSURIZED FLUIDIZED BED COMBINED PLANT AND ITS OPERATING METHOD 失效
公开(公告)号：JPH03279602A
公开(公告)日：1991-12-10
申请号：JP22507890
申请日：1990-08-29
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KOIZUMI NAOTO , MAO TAKASHI , HOIZUMI SHINICHI , NOGUCHI YOSHIKI , SASAKI TOSHIHIKO
IPC分类号： F01K23/06 , F02C3/20
摘要： PURPOSE:To enable partial load operation even when a single-shaft gas turbine is used by providing a means for controlling at least either a flow rate or a pressure of compressed air for combustion to a pressurized fluidized bed boiler. CONSTITUTION:A pressurized fluidized bed combined system where a single-shaft gas turbine 2 is adopted is provided with an inlet guide wing 20 for controlling a flow rate of an inlet air 21 of a gas turbine compressor 1 and a bypass flow rate regulating valve 19 for controlling a flow rate of a high pressure air 22 from an outlet of the compressor 1 to a pressurized fluidized bed boiler 4. in this way, the furnace air tower speed is held constant, and the ratio between the amount and the pressure of the high pressure air 22 for combustion is made the same ratio as a rated load within the specific control range. Also, as for the ratio between air and fuel, the absolute amount is changed within the specific control range. Accordingly, even when using the single-shaft gas turbine 2, partial load operation is enabled.

6. 发明专利

JP2007309194A Steam turbine plant 有权
标题翻译：蒸汽涡轮机厂
公开(公告)号：JP2007309194A
公开(公告)日：2007-11-29
申请号：JP2006138591
申请日：2006-05-18
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KONUMA MASANORI , KOIZUMI NAOTO
IPC分类号： F01D17/20 , F01D17/24 , F01K7/38
CPC分类号： F01K17/00 , F01D21/16 , F05D2220/31
摘要： PROBLEM TO BE SOLVED: To enable to perform bleeding control capable of stable supply of bleeding steam while providing continuation of turbine operation priority with avoided turbine trip accompanying bleeding even in a steam turbine plant under a high steam condition.
SOLUTION: In the steam turbine plant provided with a bleeding system bleeding part of main steam at a middle stage of a steam turbine and supplying a customer with bleeding steam, and controlling a bleeding condition, a bleeding steam flow rate meter and a bleeding steam stop valve are provided in the bleeding system, bleeding steam stop flow rate and alarm flow rate in relation to flow rate of bleeding steam can be established as limiting flow rate values, an alarm is issued if bleeding steam flow rate measured value from the bleeding steam flow rate meter reaches the alarm flow rate, opening of the bleeding steam stop valve is set to a fixed opening for limiting bleeding steam flow rate at fixed time after the alarm, and the bleeding steam stop valve is fully opened and bleeding is stopped if bleeding steam flow rate increase under the limited bleeding steam flow rate condition and the bleeding steam flow rate measured value reaches bleeding steam stop flow rate.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：即使在高蒸汽条件下的蒸汽轮机设备中，也能够提供能够稳定供应出血蒸汽的出血控制，同时提供持续的涡轮机运行优先级，同时伴随着出血的汽轮机跳闸。解决方案：在具有渗血系统的蒸汽轮机设备中，在蒸汽轮机的中间阶段将一部分主蒸汽排出并为客户提供出血蒸汽并控制出血状况，出血蒸汽流量计和出血系统设有出血止血阀，出血蒸汽停止流量和出血蒸汽流量相关的报警流量可以设定为限流量值，如果出血蒸汽流量测量值从出血蒸汽流量计达到报警流量，出气蒸汽截止阀打开设定为一个固定开口，用于限制报警后固定时间的出血蒸汽流量，出血蒸汽截止阀完全打开，出血停止如果有出血蒸汽流量条件下出血蒸汽流量增加，出血蒸汽流量测量值达到出血蒸汽停止流量。版权所有（C）2008，JPO＆INPIT

7. 发明专利

JPH01267305A CONTROL METHOD FOR COMPOUND POWER PLANT 失效
公开(公告)号：JPH01267305A
公开(公告)日：1989-10-25
申请号：JP9343388
申请日：1988-04-18
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： YANAI EIJI , HATTORI YOICHI , NAGASAKI NOBUO , NOGUCHI YOSHIKI , HASHIMOTO TSUGIO , KOIZUMI NAOTO , HOIZUMI SHINICHI , HOSHINO KAZUSADA
IPC分类号： F01K7/20 , F01K23/10
摘要： PURPOSE:To aim at improvement in plant thermal efficiency and prevention against erosion due to wetness by measuring pressure and temperature in a mid-step end at a steam turbine for their arithmetic processing, and performing control and performance monitoring over the plant thermal efficiency, the wetness of steam turbine exhaust or the like. CONSTITUTION:A fuel flow signal 11, a gas turbine load signal 13 and a gas turbine exhaust gas temperature signal 12 are operated each by a gas turbine controller 14. On the basis of these signals 11-13, a gas turbine fuel flow control valve 5 and an inlet guide vane 2 are controlled. On the other hand, on the basis of each detection signal out of a temperature gage 42 and a pressure gage 43, high pressure main steam pressure 45, temperature 46 and low pressure main steam pressure or the like are operated by a steam turbine computing element 48, and this operated result is inputted into the gas turbine controller 14. In addition, at this gas turbine controller 14, a control signal between the inlet guide vane 2 and each of high-low pressure main steam pressure control valves 23, 24 is operated according to a deviation with a signal out of the steam turbine computing element 48.

8. 发明专利

JPH02163402A COMPOUND ELECTRIC POWER PLANT AND ITS OPERATION 失效
公开(公告)号：JPH02163402A
公开(公告)日：1990-06-22
申请号：JP31766688
申请日：1988-12-16
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： KOIZUMI NAOTO , YAMAZAKI KAZUHIKO
IPC分类号： F01K7/24 , F01K23/10
摘要： PURPOSE:To increase load down rate of an electric power plant overall by providing a means for bypassing all or a part of high-pressure steam to the lower stream side of a steam turbine. CONSTITUTION:At the time of load down, deviation between a load down requir ing signal 41 and a load output signal 45 of a generator 9 is read at a control device 40, and if the output in operation is larger than the required output, a contracting instruction 42 is sent to a fuel flow regulation valve 18. After that, when the opening degree reaches the allowable minimum degree set in advance by a signal 44 from an opening degree detector 39, an opening instruc tion 43 for opening a turbine bypass valve 19 is further sent. By this method opening degree of the turbine bypass valve 19 is controlled so that excessive steam from a waste heat recovering boiler 2 is directly bypassed to a condenser 15 and the load output from the generator 9 accords with the required output. As an existing turbine bypass valve can be utilized, and increase of load down rate can be contrived without installing any new equipment.

9. 发明专利

JP2011256734A Diagnosis method and diagnosis apparatus for service life of high temperature component 有权
标题翻译：高温部件服务寿命诊断方法及诊断装置
公开(公告)号：JP2011256734A
公开(公告)日：2011-12-22
申请号：JP2010129928
申请日：2010-06-07
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SHIGETA SEIJI , KOIZUMI NAOTO
IPC分类号： F02C9/00 , F01D25/00 , F01K23/10 , F02C6/18 , F02C9/28
CPC分类号： Y02E20/16
摘要： PROBLEM TO BE SOLVED: To provide a method for diagnosing service life of a high temperature component and a diagnosis apparatus capable of recognizing the damage condition of a gas turbine high temperature component and diagnosing the service life of the high temperature component.SOLUTION: A combined cycle power generation plant includes a gas turbine 3, an exhaust heat recovery boiler 6 using the exhaust gas of the gas turbine, and a plant control device 41 controlling the operation of the gas turbine. Temperatures in the outlet side of the gas turbine and in the inlet side of the exhaust heat recovery boiler are measured with thermometers 10, 11, respectively. Relationships between the damage level of a high temperature component and a temperature difference between the outlet side temperature of the gas turbine and the inlet side temperature of the exhaust heat recovery boiler are accumulated in a database 42. The plant control device 41 predicts and diagnoses deterioration of the gas turbine with time on the basis of changes in the temperature difference between the measured outlet side temperature of the gas turbine and the inlet side of the exhaust heat recovery boiler and by using the relationship between a temperature difference and the damage level of a high temperature component preliminarily accumulated in the database.
摘要翻译：要解决的问题：提供一种用于诊断高温部件的使用寿命的方法和能够识别燃气轮机高温部件的损坏状况并诊断高温部件的使用寿命的诊断装置。解决方案：联合循环发电厂包括燃气轮机3，使用燃气轮机废气的废热回收锅炉6和控制燃气轮机运转的设备控制装置41。燃气轮机的出口侧和废热回收锅炉的入口侧的温度分别用温度计10,11测量。高温部件的损伤水平与燃气轮机的出口侧温度与废热回收锅炉的入口侧温度之间的温差的关系被累积在数据库42中。工厂控制装置41预测并诊断劣化基于燃气轮机的测量出口侧温度与排气热回收锅炉的入口侧之间的温度差的变化，并且通过使用温度差和损伤水平之间的关系，随时间变化高温成分预先累积在数据库中。版权所有（C）2012，JPO＆INPIT

10. 发明专利

JP2001050800A CONFIRMATION SYSTEM FOR CONFIRMING LEVEL SWITCH OPERATION 失效
公开(公告)号：JP2001050800A
公开(公告)日：2001-02-23
申请号：JP22831099
申请日：1999-08-12
申请人： HITACHI LTD
发明人： MIYAMOTO YOSHIYUKI , NUNOKAWA MITSUHIRO , SUZUMURA TAKESHI , KOIZUMI NAOTO
IPC分类号： G01F25/00 , F22B37/38 , G05B23/02 , H01H35/18
摘要： PROBLEM TO BE SOLVED: To automate a level switch operation test in a plant under operation to enhance reliability for an instrumentation system. SOLUTION: This system is an equipment wherein level switches 15 (A), (B) of multiplex system for detecting a liquid level are provided in a tank or apparatus for storing a liquid to form a level measuring system for measuring the liquid level, the first separation valves 16a, 16c are provided in an upper and lower parts thereof when an inside of the equipment is under a high temperature and high pressure, a piping 19e for injecting the liquid from an outside of the level measuring system and the second separation valves 16d, 16e therefore are installed to form a testing object level switch operation confirming line, the testing object level switch is separated from liquid level monitoring in the equipment by the first separation valves 16a, 16c at the time of a starting operation for a testing object level switch operation confirming test, and the liquid is injected, in this condition, from the outside of the system into the operation confirming line via the second separation valves 16d, 16e, so as to confirm an operation of the testing object level switch under operation of the system.

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