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51. 发明专利

JPS5820646B2 失效
公开(公告)号：JPS5820646B2
公开(公告)日：1983-04-25
申请号：JP2273880
申请日：1980-02-27
申请人： HITACHI LTD
发明人： OGAWA TOSHIO , EBARA KATSUYA , TAKAHASHI SANKICHI , ITO KAZUYUKI
IPC分类号： B08B3/04

52. 发明专利

JPH08135970A GAS TURBINE COMBUSTOR 失效
公开(公告)号：JPH08135970A
公开(公告)日：1996-05-31
申请号：JP27351794
申请日：1994-11-08
申请人： HITACHI LTD
发明人： YOSHIDA SHOHEI , IWAI KAZUMI , ISHIBASHI YOJI , INOUE HIROSHI , AKATSU SHIGEYUKI , KOGANEZAWA TOMOKI , ITO KAZUYUKI
IPC分类号： F02C7/232 , F23R3/28 , F23R3/30 , F23R3/34
摘要： PURPOSE: To provide a gas turbine combustor, capable of preventing the increase of combustion vibration and excellent in stability when the combustion vibration is generated in the gas turbine combustor. CONSTITUTION: A fuel nozzle for premixing combustion is installed in a premixing device 16, partitioned by a partitioning plate 21, provided with the shape of a column extending into the flow direction of mixture in the premixing device 16, whose root part is communicated with a fuel manifold 19 connected to a fuel supplying system at the outside of a combustor, and provided with a fuel injection port 20, ejecting the fuel, at the tip end of the nozzle. In such a nozzle, the axial lengths of two sets of neighboring fuel nozzles 17a, 17b are regulated, for example, whereby distances (La, Lb) from the fuel injection port 20 to the forming position of premix flames become different.

53. 发明专利

JPH0828874A GAS TURBINE COMBUSTION DEVICE AND GAS TURBINE 失效
公开(公告)号：JPH0828874A
公开(公告)日：1996-02-02
申请号：JP16769794
申请日：1994-07-20
申请人： HITACHI LTD
发明人： ITO KAZUYUKI , MURAKAMI TADATAKA , KOBAYASHI SHIGEYOSHI , AZUHATA SHIGERU , MORITOMO YOSHIKAZU
IPC分类号： F02C9/28 , F23D14/02 , F23D23/00 , F23R3/12 , F23R3/16 , F23R3/18 , F23R3/28 , F23R3/30 , F23R3/34 , F23R3/46
摘要： PURPOSE:To provide a gas turbine combustion device in which a stable combustion can be carried out within a wide fuel flow rate range. CONSTITUTION:A burner 1 is provided with fuel nozzles 31 and 32. When an operation is carried out under a low fuel flow rate, fuel supplied from the nozzle 31 is applied to form a dispersion flame at a ring-like flame holder 11. Then, fuel is supplied from the nozzle 32. The fuel is mixed with air and reaches the flame holder 11, is held at the dispersion flame already formed and then a stable premixed flame is formed at the flame holder 11 in view of a low fuel and air ratio. Also when the flame is transmitted from the burner 1 to the burner 2, a fuel air ratio at an outer periphery of the burner 1 is locally increased by the fuel supplied from the nozzle 31. With such an arrangement as above, it is possible to improve stability in combustion with a wide fuel flow rate range and a flame transmittance to the adjoining burner may also be easily carried out.

54. 发明专利

JPH07280267A GAS TURBINE COMBUSTION DEVICE 失效
公开(公告)号：JPH07280267A
公开(公告)日：1995-10-27
申请号：JP7041694
申请日：1994-04-08
申请人： HITACHI LTD
发明人： KOMATSU YASUTAKA , URUSHIYA HARUO , AZUHATA SHIGERU , IIZUKA NOBUYUKI , WATANABE YASUYUKI , ARAI HIROYUKI , KOBAYASHI SHIGEYOSHI , OTSUKA MASAYA , ITO KAZUYUKI
IPC分类号： F23R3/18 , F23D23/00 , F23R3/20 , F23R3/26 , F23R3/28 , F23R3/30 , F23R3/34
摘要： PURPOSE:To provide a low NOx combustion device for a gas turbine in which a dispersion combustion and a premixing combustion are carried out in the same combustion chamber so as to improve a combustion stability as well as its operating characteristics and to reduce NOx. CONSTITUTION:A dispersion combustion fuel nozzle 2A is mounted at an upstream side of a premixing nozzle 3A. A conical partition wall 5 is installed between the dispersion fuel nozzle 2A and the premixing nozzle 3A so as to enable dispersion flame 9B of high temperature to be formed. In addition, in order to perform a stable combustion of dispersion flame 9B, air 4A for dispersion of dispersed fuel is injected as a circulating flow 8 with a circulating vane 7 and then a circulating flow 8 of high temperature is formed at a downstream side of the fuel nozzle 2A for the dispersion combustion. The conical partition wall 5 reduces a volume of partition wall cooling air 4B. With such an arrangement as above, it is possible to improve stability of dispersion flame and reduce unburnt substance such as carbon monoxide. In addition, it is possible to reduce NOx more with an increased amount of premixing air caused by a reduction in cooling air volume.

55. 发明专利

JPH07133927A COMBUSTION UNIT CONTROLLER 失效
公开(公告)号：JPH07133927A
公开(公告)日：1995-05-23
申请号：JP27927793
申请日：1993-11-09
申请人： HITACHI LTD
发明人： TSUBOI NOBUYOSHI , SOMA KENICHI , ITO KAZUYUKI
IPC分类号： F23N1/02 , F23N5/08
摘要： PURPOSE:To simultaneously obtain information of color image and information for spectral analysis by one camera by using an exposure controller as means for measuring a light emitting luminance in a combustion unit controller in which radical luminance of a flame in a combustion unit is measured and a fuel-air ratio is calculated. CONSTITUTION:An electronic camera 820 corresponding to RGB for collecting a light emitting image of a flame 241 to be formed by a combustion unit 200 having F1 and F2 combustion units 284, 272 is provided, RGB signals to be output from the camera 820 are sent to a calculator 806 through an image input unit 804 in parallel with outputting of the signal to a color monitor, etc. The calculator 806 measures radial luminance of the flame 241 to calculate a fuel-air ratio, and evaluates its burning state. An output signal of the calculator 806 is sent to an image processor 808, which conducts a pseudo color displaying, a binary process for splitting arbitrary intensity as a boundary, an area calculating, a position calculating and edge processing, etc., for a physical amount image to evaluate the burning state and outputs its result to a monitor 810.

56. 发明专利

JPH06323165A CONTROL DEVICE AND METHOD FOR GAS TURBINE 失效
公开(公告)号：JPH06323165A
公开(公告)日：1994-11-22
申请号：JP11495993
申请日：1993-05-17
申请人： HITACHI LTD
发明人： OYAMA TAKASHIGE , NISHIMURA YUTAKA , SATO YOSHIO , NISHIHARA MOTOHISA , AZUHATA SHIGERU , ITO KAZUYUKI
IPC分类号： F02C9/28 , F23R3/26 , F23R3/30 , F23R3/34
摘要： PURPOSE:To provide a control device for a gas turbine for properly controlling air-fuel ratio in accordance with a combustion condition so that emission of nitrogen oxide can be reduced. CONSTITUTION:In a gas turbine wherein air flow control valves 10, 12 for controlling a flow amount of combustion air are interposed in an air flow path from a compressor 1 to the gas turbine 2, air flow sensors 30, 34, 35 are arranged in the vicinity of each air flow control valve, and based on a signal from the sensors, openings of fuel amount adjusting valves 18 to 22 and air flow control valves 10, 12 are adjusted to control air-fuel ratio in a combustion part. Accordingly, by directly and high accurately detecting a combustion air amount in the gas turbine combustion part by the flow sensor arranged in the vicinity of each air flow control valve 11, since the air-fuel ratio in the combustion part is controlled to be based on an actually measured value of the sensor, the air-fuel ratio can be set to a large value in the vicinity of a limit value of air-fuel ratio, and emission of nitrogen oxide can be reduced without causing a misfire and after burn.

57. 发明专利

JPH06294516A FLAME STABILIZER FOR GAS TURBINE COMBUSTOR AND GAS TURBINE COMBUSTOR WITH THE FLAME STABILIZER 失效
公开(公告)号：JPH06294516A
公开(公告)日：1994-10-21
申请号：JP8061393
申请日：1993-04-07
申请人： HITACHI LTD
发明人： ITO KAZUYUKI , MURAKAMI TADATAKA , KAWAIKE KAZUHIKO , AZUHATA SHIGERU , KURODA MICHIO
IPC分类号： F23R3/18
摘要： PURPOSE:To improve stability of combustion of a gas turbine combustor by a flame stabilizer and to prevent generation of an overheated part of high temperature in the flame stabilizer. CONSTITUTION:On a surface of a flame stabilizer 11, except a heat receiving surface 13, which is formed of a flame stabilizing part 14 which is in contact with combustion gas and a supporting part to rectify a stream, a turbulence promoter 12 is arranged to promote heat transmission from the flame stabilizer 11 to a stream of air and fuel. In order to prevent generation of backfire due to the provision of the turbulance promoter 12, a distance from the turbulence promoter 12 arranged nearmost the heat receiving surface 13 to the heat receiving surface 13 is set four times as far as the height of the turbulence promoter 12. Thereby temperatures of the stream of air and fuel is raised to improve stability of combustion, and at the same time, the temperature of the flame stabilizer is lowered so that duration of the flame stabilizer 11 can be prolonged.

58. 发明专利

JPH06137558A FLOW RATE DISTRIBUTION CONTROL MECHANISM FOR GAS TURBINE BURNING APPARATUS 失效
公开(公告)号：JPH06137558A
公开(公告)日：1994-05-17
申请号：JP28726792
申请日：1992-10-26
申请人： HITACHI LTD
发明人： YAMAGISHI MASAHIKO , KIEDA SHIGEKAZU , HAYASHI NORIYUKI , YOSHIDA SHOHEI , AZUHATA SHIGERU , ITO KAZUYUKI
IPC分类号： F23R3/26 , F23R3/34
摘要： PURPOSE:To enable the introducing of a necessary amount of air into a premixer of a flow rate distribution control mechanism of a gas turbine burning apparatus. CONSTITUTION:The area of an opening of an air hole 2 varies with the position of a cylinder ring 5 and a first stage burner side passage is reduced with a flow rate control plate 6 moving integral with the changes thereof. This allows increase in draft resistance of the first burner side passage 7 with the flow rate control plate 6 even when the draft resistance of the premixer 3 is large thereby always enabling the introduction of a necessary amount of air into the premixer 3.

59. 发明专利

JPH06137166A SUPPORTING STRUCTURE FOR GAS TURBINE COMBUSTOR 失效
公开(公告)号：JPH06137166A
公开(公告)日：1994-05-17
申请号：JP28726992
申请日：1992-10-26
申请人： HITACHI LTD
发明人： HAYASHI NORIYUKI , IWAI KAZUMI , ISHIBASHI YOJI , AKATSU SHIGEYUKI , AZUHATA SHIGERU , ITO KAZUYUKI , INNAMI TAMIO , INOUE HIROSHI , YOSHIDA SHOHEI , TSUKAHARA SATOSHI
IPC分类号： F02C7/20 , F23R3/60
摘要： PURPOSE:To improve rigidity and wear resistance of a spring while eliminating air flowing into a tail cylinder from a liner by mounting a separate spring also between the inside of the spring and the liner, in a supporting structure wherein the spring is mounted to an end part of the liner inserted to the tail cylinder. CONSTITUTION:A spring 3, formed by bending a thin plate into a circular arc shape, is mounted on an end peripheral surface of a liner 1 on the side of a tail cylinder 2. Many slits 4 are formed in an axial direction of the liner 1. Further, a rear end part 5 of the spring 3 is spot welded by a spot 6 to the liner 1. Also between the inside of the spring 3 and the liner 1, a similarly formed spring 3' is mounted. In a condition that the liner l is completely inserted into the tail cylinder 2, both the outside/inside springs 3, 3' are overlapped with each other, and also the respective slits 4, 4' are displaced from each other. In this way, rigidity and wear resistance of the spring 3 are improved while eliminating air flowing into the tail cylinder 2 from the liner 1.

60. 发明专利

JPH06101808A PREMIXING COMBUSTION DEVICE AND COMBUSTION CONTROL THEREOF 失效
公开(公告)号：JPH06101808A
公开(公告)日：1994-04-12
申请号：JP24754392
申请日：1992-09-17
申请人： HITACHI LTD
发明人： TANIGUCHI MASAYUKI , ITO KAZUYUKI , KOBAYASHI YOSHINOBU , MURAKAMI TADATAKA , KURODA MICHIO , AZUHATA SHIGERU
IPC分类号： F23C1/02 , F23C99/00 , F23C11/00
摘要： PURPOSE:To always maintain a NOx at a low level and stabilize a flame by a method wherein fuel and/or air volume is controlled in such a manner that a composition of fuel flowing into a burner, a moisture concentration of air, a temperature of air and a flame temperature calculated in response to an air ratio are set to be within an allowable range. CONSTITUTION:At a basic control device, a flame temperature of each of burners is calculated in response to an air temperature, humidity, pressure, flow rate, composition of fuel and moisture content in fuel. Then, a flow rate, fuel distribution and air flow rate distribution are corrected when it is judged that a flame blowing-off occurs or a concentration of discharged NOx exceeds its limit value in reference to a function 1 in which a relation between the flame temperature and the NOx discharging concentration is set as a function, a function 2 in which a fuel composition and the NOx discharging concentration variation is set as a function, and a function 3 in which a relation between the flame temperature where the flame is blown off and an injection speed of the mixture gas is set as a function. With such an arrangement as mentioned above, the variation of the discharging amount of NO2 caused by the surrounding air temperature, humidity and variation of composition of the fuel and the like is minimized and a stable flame with a low NOx can be obtained.

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