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31. 发明专利

JPS638596A METHOD OF INJECTING IRON ION TO COOLING WATER FOR NUCLEAR REACTOR 失效
公开(公告)号：JPS638596A
公开(公告)日：1988-01-14
申请号：JP15166586
申请日：1986-06-30
申请人： HITACHI LTD
发明人： ITO KAZUYUKI , SAWA TOSHIO , NISHINO YOSHITAKA , ADACHI TETSURO , OSUMI KATSUMI
IPC分类号： G21C19/307 , G21C19/30

32. 发明专利

JP2001132951A GAS TURBINE COMBUSTOR AND GAS TURBINE DEVICE 失效
公开(公告)号：JP2001132951A
公开(公告)日：2001-05-18
申请号：JP31472999
申请日：1999-11-05
申请人： HITACHI LTD
发明人： SHIGETA SEIJI , SASAO TOSHIBUMI , TAKEHARA ISAO , ITO KAZUYUKI
IPC分类号： F23R3/16 , F23C99/00 , F23R3/32 , F23R3/34 , F23C11/00
摘要： PROBLEM TO BE SOLVED: To reduce the NOx content in the combustion gas of a gas turbine combustor for premix combustion by improving the stability of the premix combustion by making the fuel concentration distribution in a premixed gas uniform. SOLUTION: In a gas turbine combustor, a plurality of premixed burners having flow passages for forming premixed gas flows is annularly arranged around a diffusion combustion burner and an annular member is set up on the downstream side of the premixed burners by means of a supporting member provided between wall surfaces dividing the flow passages of the premixed burners. The openings of the flow passages facing a combustion chamber on the wall surface sides are more protruded in the axial direction of the combustion chamber positioned on the downstream side of the premixed gas flows than the openings of the flow passages on the center side of the combustion chamber. In addition, a closing member which separates the space section of the clearance formed on the outer periphery side of the wall surface dividing the flow passages for premixed gas flows of the adjacent premixed burners from the combustion chamber is provided in the space section of the clearance.

33. 发明专利

JP2001012740A GAS TURBINE COMBUSTION DEVICE 失效
公开(公告)号：JP2001012740A
公开(公告)日：2001-01-19
申请号：JP18517699
申请日：1999-06-30
申请人： HITACHI LTD
发明人： SHIGETA SEIJI , WATANABE YASUYUKI , MORIWAKI BUNJI , MORITOMO YOSHIKAZU , TAKEHARA ISAO , SASADA TETSUO , ITO KAZUYUKI , KOBAYASHI SHIGEKI
IPC分类号： F23R3/16 , F23R3/28 , F23R3/32
摘要： PROBLEM TO BE SOLVED: To provide a gas turbine combustion device to reduce incurring of a pressure loss at a premixer, sufficiently mix together fuel and air at a short premixture distance, and further sufficiently prevent the damage of a combustor due to discharge of flame to the outside of the premixer even when ignition is effected at the internal part of the premixer and flame is present. SOLUTION: A premixer 4 to mix together air and fuel is provided in a spot situated upper stream from a combustion chamber 2. The premixer comprises a gas flow passage 20 through which combustion air and mixture gas flow; and a fuel nozzle 5 situated in the gas flow passage. Fuel injected through a fuel nozzle is mixed with air in the premixer, and the air-fuel mixture is fed in the combustion chamber 2. In a so formed gas turbine combustion device, an air flow direction varying means 40 to change a flow of air flowing through the premixer into the direction of the fuel nozzle hole of the fuel nozzle is situated in a spot situated upper stream from the fuel nozzle hole of the fuel nozzle 5 and on the gas flow passage wall of the premixer. Further, a gas flow passage throttle means 30 to throttle the sectional area of the gas flow passage is situated in a spot situated downstream from the fuel nozzle hole of the fuel nozzle.

34. 发明专利

JP2000121056A GAS TURBINE 失效
公开(公告)号：JP2000121056A
公开(公告)日：2000-04-28
申请号：JP29173198
申请日：1998-10-14
申请人： HITACHI LTD
发明人： WATANABE YASUYUKI , SASADA TETSUO , TAKEHARA ISAO , MORITOMO YOSHIKAZU , SASAO TOSHIBUMI , MORIWAKI BUNJI , SHIGETA SEIJI , ITO KAZUYUKI
IPC分类号： F23R3/08 , F23R3/46
摘要： PROBLEM TO BE SOLVED: To enable a gas turbine to maintain the fuel-air ratios of combustor cans in a prescribed stable combustible range by providing a means which reduces the flow rate of a fluid in the clearance between a flame propagating pipe connecting a plurality of can-type combustors to each other and an outer cylinder covering the outer periphery of the propagating pipe. SOLUTION: Each can type combustor 1a constituting a gas turbine is provided with a diffusion burner 7 having a fuel nozzle 3 which jets fuel 10 for diffusion combustion into the inner pipe 19 of a combustion chamber 2 and a premixing burner 8 having a fuel nozzle 5 which jets fuel 11 for premixing combustion into a premixer 4. Combustion air 12 is supplied to the combustor 1a from a compressor through a flow passage 32 formed between the inner pipe 19 of the chamber 2 and an outer cylinder 21 covering the outer periphery of the pipe 19. In the burner 7, the combustion air 12 and fuel 10 from the nozzle 3 form a circulating vortex of a combustion gas and becomes a stable diffusion flame. The air 12 flowing in the premixer 4 is mixed with the fuel 11 jetted from the nozzle 5 by means of a turning device 9 and jetted into the chamber 2 for combustion. A flow rate reducing means 30 is arranged in the flow passage 22 between a flame propagating pipe 20 and its outer cylinder 21.

35. 发明专利

JP2000046333A GAS TURBINE COMBUSTOR 失效
公开(公告)号：JP2000046333A
公开(公告)日：2000-02-18
申请号：JP21682998
申请日：1998-07-31
申请人： HITACHI LTD
发明人： INOUE HIROSHI , KOGANEZAWA TOMOKI , ITO KAZUYUKI , KOBAYASHI SHIGEYOSHI
IPC分类号： F23R3/32 , F23R3/34
摘要： PROBLEM TO BE SOLVED: To reduce Nox by providing a burner for supplying a premixed gas with air at a fuel combustion chamber and forming a plurality of ejection openings of the premix burner in the inner circumferential side face of the combustion chamber along the axial direction thereof thereby making lean the premixed gas through effective use of cooling air. SOLUTION: Compressed air 50 from a compressor 10 passes between the outer tube 2 of a gas turbine combustor and a combustor liner 3 and then a part thereof flows into a premixer 12 as premix combustion air 49 while the remainder flows from a combustion air hole 14 and a cooling air hole 17 into a combustion chamber 1. Diffused combustion fuel 16 is ejected from a diffusion fuel nozzle 13 into the combustion chamber 1 to form a diffused flame 4 and premixing fuel 21 is ejected from a fuel nozzle 8 into an annular premixer 12 where it is mixed with air to produce premixed gas 22. The premixed gas 22 flows from a combustor liner 3 having a louver-like ejection opening into the combustion chamber 1 where it is fired by high temperature gas generated through diffused combustion to form a premixed flame 5 along the wall face of the liner.

36. 发明专利

JPH11218004A GAS TURBINE OPERATION MONITORING DEVICE 失效
公开(公告)号：JPH11218004A
公开(公告)日：1999-08-10
申请号：JP2174698
申请日：1998-02-03
申请人： HITACHI LTD
发明人： NAGABUCHI NAOYUKI , KAWAMURA HIDEYUKI , ITO KAZUYUKI
IPC分类号： F01K23/10 , F02C6/18 , F02C9/00 , F22B37/00 , F23N5/00
摘要： PROBLEM TO BE SOLVED: To change values of a fire temperature, a member temperature distribution and thermal stress to operation program values in which a plant output is made maximum by predicting the fire temperature from information on input/output quantity of heat of a combustor, predicting the member temperature distribution of the combustor based on this information and calculating thermal stress generated in the members. SOLUTION: After an enthalpy rate of change of combustion gas which is subtracted from total input quantity of heat and output quantity of heat and subtracts information from a flow meter 16 from total input flow rate by integrators 22, 23, the enthalpy rate of change is divided by a value setting volume of a combustor by a divider 31, a rate of change of combustion gas density is determined by an integrator 32 and a fire temperature is calculated by outputs of the integrators 23, 32. In signals from a fire temperature computing element 24, temperature and pressure meters 11, 12 and a fuel air ratio computing element 39, a peripheral direction temperature gradient value in a heat stress computing element 33 is calculated as a stress integrated value applied to a member during operation time in an integrator 34, a difference with a constant setting device 35 is outputted by a subtracter 36 and whether the difference is within an allowable range or not is evaluated by a deciding device 37. When the difference does not exceed, information on a new operating state is outputted to a display device 19.

37. 发明专利

JPH10212976A GAS TURBINE COMBUSTOR 失效
公开(公告)号：JPH10212976A
公开(公告)日：1998-08-11
申请号：JP32578897
申请日：1997-11-27
申请人： HITACHI LTD
发明人： NAGABUCHI NAOYUKI , ITO KAZUYUKI , KIMURA YOTARO
IPC分类号： F02C9/28 , F02C9/34 , F23N5/00 , F23R3/28 , F23R3/32 , F23R3/34 , F23R3/46
摘要： PROBLEM TO BE SOLVED: To restrain a fluctuation of plant output in fuel switching of a premixed combustion part by controlling the opening of a pressure regulating valve of a general piping according, to the predetermined control contents while the opening of a fuel flow adjusting valve of a fuel piping corresponding to the increased and decreased combustion part fluctuates. SOLUTION: In a gas turbine combustor 1 comprising one diffusion combustion part and two premixed combustion part, fuel to the diffusion combustion part is regulated to designated pressure by a pressure regulating valve 12, and then adjusted to a designated flow by a fuel flow adjusting valve 10 to be introduced into a diffusion nozzle 8. On the other hand, fuel to the premixed combustion part is regulated to designated pressure by a pressure regulating valve 6 and then adjusted to a designated flow by fuel flow adjusting valves 4-a, 4-b to be introduced into pre-mixing nozzles 2-a, 2-b. At this time, in the range from load O to load (a), diffusion combustion is singly performed so that fuel is thrown in by the fuel flow adjusting valve 10 to burn, and in the range from load (a) to load (b), fuel is thrown in by the fuel flow adjusting valves 10, 4-a to burn.

38. 发明专利

JPH10212975A GAS TURBINE COMBUSTION DEVICE AND GAS TURBINE FUEL FEEDER 失效
公开(公告)号：JPH10212975A
公开(公告)日：1998-08-11
申请号：JP1675497
申请日：1997-01-30
申请人： HITACHI LTD
发明人： NAMEKAWA MASAHISA , MORITOMO YOSHIKAZU , KOMATSU YASUTAKA , SASADA TETSUO , SATO TAKESHI , WATANABE YASUYUKI , ITO KAZUYUKI , MOMO SATOSHI
IPC分类号： F02C7/228 , F23K5/06
摘要： PROBLEM TO BE SOLVED: To improve control performance, and obtain a stable output by decreasing a deviation and difference of a fluidity in a fuel feeder. SOLUTION: In a gas turbine fuel feeder provided with fuel nozzles respectively provided on a plurality of fuel cans, a fuel manifold 9 for distributing and supplying fuel to respective fuel nozzles, and a fuel feed pipe 8 for leading fuel into the fuel manifold 9, a leading part extending capacity part 14 is arranged on a leading part for leading a fuel feed pipe 8 toward the manifold 9, as well as on an extending part of the leading part in an advance direction of fuel which flows in the fuel feed pipe 8.

39. 发明专利

JPH09189242A FLOW RATE CONTROL DEVICE 失效
公开(公告)号：JPH09189242A
公开(公告)日：1997-07-22
申请号：JP1596
申请日：1996-01-04
申请人： HITACHI LTD
发明人： NAGABUCHI NAOYUKI , ITO KAZUYUKI
IPC分类号： F02C9/50
摘要： PROBLEM TO BE SOLVED: To reduce the deviation of the air fuel ratio in a combustor in a fuel feed device of a gas turbine. SOLUTION: A flow rate control device comprises a flow rate feed piping consisting of a main pipe 1, a plurality of branch pipes 2 and a main pipe inlet piping 3, flow meters 7, 8 of each piping, a flow meter 9 of an air flow passage 5 of a combustor, a flow rate regulating valve 6 in the middle of the branch pipes 2, a computing unit 10 to perform the opening operation of the flow rate regulating valve based on the output of each flow meter, and a controller 11. The controller 11 is provided with a PI gain corresponding to the load change rate. An optimization computing unit is combined with the computing unit 10 so as to cope with the larger load change rate.

40. 发明专利

JPH0942672A GAS TURBINE COMBUSTOR 失效
公开(公告)号：JPH0942672A
公开(公告)日：1997-02-14
申请号：JP19965695
申请日：1995-08-04
申请人： HITACHI LTD
发明人： KOBAYASHI SHIGEYOSHI , OTAGURO TOSHIO , YAMAGISHI MASAHIKO , HAYASHI NORIYUKI , SASAO TOSHIBUMI , KOIZUMI HIROMI , YOKOTA OSAMU , ITO KAZUYUKI , OTSUKA MASAYA
IPC分类号： F23R3/28 , F23C99/00 , F23C11/00
摘要： PROBLEM TO BE SOLVED: To provide a gas turbine combustor wherein mixing is promoted within a short mixing distance, and even with a low load, i.e., even with the reduced amount of heat production stable fire transfer from a pilot burner to a main burner is ensured, and an operation range of a gas turbine is expanded. SOLUTION: A gas turbine combustor is constructed with a pilot burner 1 and a premixing main burner 10 disposed to surround the former. In the combustor the main burner 10 is constructed with a fuel nozzle 12, an annular premixer 14 for mixing a fuel jetted from the fuel nozzle and air, and a baffle disposed downstream the premixer. There is further provided a plurality of concave parts 4 in an internal peripheral side cylinder surface of the annular premixer, each concave part being directed toward an outer peripheral side and having its height and width in the flow direction of mixed gas being increased. High temperature gas burned in the pilot burner flows to the inside of the concave part.

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