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71. 发明专利

JPH07280265A COMBUSTION DEVICE FOR GAS TURBINE AND OPERATING METHOD FOR COMBUSTION DEVICE 失效
公开(公告)号：JPH07280265A
公开(公告)日：1995-10-27
申请号：JP7038794
申请日：1994-04-08
申请人： HITACHI LTD
发明人： INOUE HIROSHI , ISHIBASHI YOJI , YOSHIDA SHOHEI , KOGANEZAWA TOMOMI , AKATSU SHIGEYUKI , IWAI KAZUMI
IPC分类号： F23R3/12 , F23R3/30
摘要： PURPOSE:To reduce NOX by a method wherein an inclination angle of each of inclination wings installed in an annular flow passage of a premixing device can be freely changed, mixing of fuel and air is activated and combustion reaction is promoted. CONSTITUTION:Inclination wings 6 and 7 for applying a circulating component to mixture gas of fuels 21, 22 and air 50 are arranged in annular flow passages 11 and 12 of a premixing device. The inclination wing arranged at least in one annular passage, an inclination wing 7 in the annular flow passage 12, for example, is formed into a rotatable inclination wing of which inclination angle can be freely changed. Due to this arrangement, it is possible to set a reversible direction of a circulating direction of each of fuels 21, 22 and air 50 flowing in the adjoining annular flow passages 11 and 12, thereby mixing of fuels 21 and unburnt is reduced. With such an arrangement as above, it is possible to activate mixing of fuels 21, 22 and the air 50 and to promote a combustion reaction, the amount of fuel remaining unburnt is reduced bycomplete combustion, resulting in NOX reduction.

72. 发明专利

JPH07260149A COMBUSTION APPARATUS FOR GAS TURBINE 失效
公开(公告)号：JPH07260149A
公开(公告)日：1995-10-13
申请号：JP5380194
申请日：1994-03-24
申请人： HITACHI LTD
发明人： ISHIBASHI YOJI , IWAI KAZUMI , INOUE HIROSHI , YOSHIDA SHOHEI , AKATSU SHIGEYUKI , KOGANEZAWA TOMOKI
IPC分类号： F23R3/12 , F23R3/30 , F23R3/34
摘要： PURPOSE:To increase a fuel air ratio range which has a small NOx generation quantity and in which a burning flame of a premixing burner is stabilized by sequentially disposing a diffusion pilot burner, its combustion air passage and the burner from an upstream side of a combustion apparatus, and opening an exhaust port of the burner with a burning flame area of the pilot burner. CONSTITUTION:An auxiliary air channel 24 having a diffusion pilot burner 18 at a center and a special purpose auxiliary air swirler 17 for the burner on its outer periphery is provided on an upstream side end face of a combustion apparatus 2, and a main air channel 11 is further provided on an outer periphery of its downstream side. An annular first premixing burner 13 is provided on an outer periphery of the channel 11, and its upstream end becomes an air inlet of a first premixing burner. A downstream end of the premixing burner is opened with a downstream side of a main air channel for the pilot burner, i.e., premixed gas is supplied into the apparatus at the downstream side of a diffusion pilot flame.

73. 发明专利

JPH07248117A COMBUSTION METHOD FOR GAS TURBINE PREMIXING COMBUSTOR 失效
公开(公告)号：JPH07248117A
公开(公告)日：1995-09-26
申请号：JP3943094
申请日：1994-03-10
申请人： HITACHI LTD
发明人： ISHIBASHI YOJI , IWAI KAZUMI , INOUE HIROSHI , YOSHIDA SHOHEI , AKATSU SHIGEYUKI , KOGANEZAWA TOMOKI
IPC分类号： F02C9/34 , F23R3/30 , F23R3/34
摘要： PURPOSE:To provide a combustion method for a gas turbine premixing combustor capable of controlling the generation amount of NOX by a diffusion burner without deteriorating freedom and reliability in the operation of a gas turbine during the period from the start to the rated operation of the gas turbine. CONSTITUTION:A combustor is provided with a first stage combustion chamber (I), a first stage mixing region (II), a second stage combustion chamber (III), a second stage mixing region (IV) and a third stage combustion chamber (V) which are arranged in the above order from the upstream side, and combustion gas generated in the first stage combustion chamber (I) and pre-mixed gas supplied from a downstream side are mixed with each other and pre-mixed combustion is successively effected in the second stage combustion chamber (III) and the third stage combustion chamber (V) in accordance with the load of a gas turbine. Before the pre-mixed combustion on the downstream side is effected, in the first stage combustion chamber (I) mode is switched from a combustion mode by use of diffusion fuel 28 to a diffusion/first stage pre- mixed hybrid combustion mode in which most part of the diffusion fuel 28 is diverted to primarily pre-mixed fuel 29.

74. 发明专利

JPH0779530A METHOD FOR ESTIMATING DISTRIBUTION SECTION LOAD 失效
公开(公告)号：JPH0779530A
公开(公告)日：1995-03-20
申请号：JP22354693
申请日：1993-09-08
申请人： HITACHI LTD
发明人： TERUNUMA YOSHIO , INOUE HIROSHI
IPC分类号： H02J3/00
摘要： PURPOSE:To provide means for enhancing the accuracy in the estimation of distribution section load and to enhance the accuracy in the load interchange processing. CONSTITUTION:When the distribution section load is determined through proportional distribution of distribution line current being fed from power supply side based on a predetermined facility capacity ratio, the facility capacity ratio is multiplied by a load variation rate determined by the unique attributes of distribution section being fed with the distribution line current before the proportional distribution is effected again in order to determine the distribution section load.

75. 发明专利

JPH06323541A FLAME HOLDER STRUCTURE FOR COMBUSTOR 失效
公开(公告)号：JPH06323541A
公开(公告)日：1994-11-25
申请号：JP10782593
申请日：1993-05-10
申请人： HITACHI LTD
发明人： INNAMI TAMIO , INOUE HIROSHI , MORITOMO YOSHIKAZU , NAKAYAMA YOSHIHARU
IPC分类号： F23R3/18
摘要： PURPOSE:To prevent any crack and deterioration of a title structure both due to thermal stress by providing a heat insulation member on the surface of a member constituting the title structure, and altering the thickness of the heat insulation member in order to control the amount of heat transferred to a flame holder as needed. CONSTITUTION:A heat insulation member 8 having a smaller heat conductivity than that of chief members of a flame holder 1 is provided on the surface of a flame holder device end 2 being the surface to be heated and facing the flame. The thickness of the heat insulation member 8 is altered radially and circumferentially according to the distribution of the amount of heat transferred from the flame holding device end 2 to control the amount of heat transferred to the flame holder 1 for uniforming the temperature distribution in the flame holder 1. Simultaneously, the wall thickness of a flame holder body 1 is uniformed with respect to a flame surface so as to uniform the heat capacity of the flame holder 1. Hereby, the surface area for reception of heat is increased. The surface area for reception of heat is thus increased, whereby the density of the transferred heat from the surface to be heated is reduced to uniformhu the temperature distribution in the flame holder 1. Thus, the amount of the heat entering the flame holder 1 is interrupted or reduced without affecting the flame holding performance.

76. 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.

77. 发明专利

JPH0250026A GAS TURBINE COMBUSTOR AND ITS OPERATION METHOD 失效
公开(公告)号：JPH0250026A
公开(公告)日：1990-02-20
申请号：JP19598788
申请日：1988-08-08
申请人： HITACHI LTD
发明人： ISHIBASHI YOJI , INOUE HIROSHI , OMORI TAKASHI , HASHIMOTO TAKASHI , KATO FUMIO , AKATSU SHIGEYUKI , ARAI TORU , KURODA MICHIO , KUNO KATSUKUNI
IPC分类号： F02C7/22 , F02C7/26 , F23C99/00 , F23R3/34
摘要： PURPOSE:To enable a burner not to be too high temperature and make it produce low-concentration NOX at the time of start by providing an auxiliary burner for transferring a first stage combustor to a premixing chamber by flame holding and quenching in the first stage combustor by ignition. CONSTITUTION:Since there is an auxiliary burner 52, at the time of ignition thereof a diffusion burning flame is formed in a first stage combustor 1, a premixing flame is shaped and the auxiliary burner 52 is allowed to stop, so that the first stage combustor 1 is transferred to the premixing chamber. The mixing gas of the premixing chamber is flame-held in a second stage combustor together with a second stage flame and a first stage burning is premix-burned to be perfect premixing burning including the first stage flame and the second flame. Further, since at the time of transfer auxiliary burner combustion is supplied as first stage fuel, transfer for low NOX can smoothly be performed without the influence of rapid transfer, excessive load and the like for second stage premixing combustion at the time of premixing burning transfer. Further, since premixing combustion is wholly performed without any diffusion combustion part, lower NOX can be achieved.

78. 发明专利

JPH0240418A GAS TURBINE BURNER 失效
公开(公告)号：JPH0240418A
公开(公告)日：1990-02-09
申请号：JP18844488
申请日：1988-07-29
申请人： HITACHI LTD
发明人： OMORI TAKASHI , ISHIBASHI YOJI , INOUE HIROSHI , KATO FUMIO , HASHIMOTO TAKASHI , KURODA MICHIO , AKATSU SHIGEYUKI
IPC分类号： F23R3/30 , F23C99/00 , F23R3/34
摘要： PURPOSE:To obtain a gas turbine burner which is capable of carrying out stabilized premixing combustion even under lean side combustion state advantageous to the reduction in NOx and high speed conditions by bending forcibly a premixed jet stream and enlarging a circulating flow region on the downstream side. CONSTITUTION:A main combustion 5, which is larger than a sub-combustion chamber 4 in diameter, is installed. On the head of the sub-combustion chamber 4 is installed a first stage fuel nozzle 7, while a second stage premixing fuel nozzle 10, and a revolving device 8 are installed to an enlarged section which is communicated with the main combustion chamber 5. A main chamber side wall 11 near the outlet of the revolving device 8 forms a recessed part 15 based on a combination of a reduction part 12, a drastic enlarges part 13, and a circulating part 14 on an after stream side, and further forms air cooling structure by adopting a double wall layer. A part of premixed jet air stream 29 is bent at a reduced section 12 toward the central part 33, which enlarges the region of circulating stream 34 induced inside the recessed part 15 larger than it looked and promotes the reaction of combustion.

79. 发明专利

JPH01273918A FUEL PREMIXING BURNER 失效
公开(公告)号：JPH01273918A
公开(公告)日：1989-11-01
申请号：JP10034888
申请日：1988-04-25
申请人： HITACHI LTD
发明人： KURODA MICHIO , HIROSE FUMIYUKI , KIRIKAMI SEIICHI , SATO ISAO , ARAI OSAMU , SHIMIZU NOBUO , ISHIBASHI YOJI , INOUE HIROSHI
IPC分类号： F23R3/30 , F23D14/74
摘要： PURPOSE:To enable stable combustion of fuel flowing out from a premixing device which needs to process a high flow rate, by a method wherein a pilot flame forming device and flame stabilizing structure are situated in a flow passage part through which premixture fuel flows. CONSTITUTION:A premixer is formed in an annular shape, air flows in from a radial direction, and flows out through an axial annular flow passage. Air flows through a space between inner and outer side walls 1 and 2. The direction of a flow is set by means of a guide plate 3 for outflow. A fuel feed part 4 is located on the upper stream side of the guide plate 3, and fuel is injected in air through a plurality of fuel feed holes. A pilot fuel injection part 5 is mounted to an injection end part. Fuel for a pilot flame is injected through a plurality of fuel injection nozzles 7 to form flame at a downstream part. The pilot flame injection part is formed in a shape in cross section in which the generation of a vortex part 8 is apt to make on the downstream, and flame is reliably stabilized by means of the vortex part.

80. 发明专利

JPS6454122A GAS TURBINE BURNER 失效
公开(公告)号：JPS6454122A
公开(公告)日：1989-03-01
申请号：JP21009587
申请日：1987-08-26
申请人： HITACHI LTD
发明人： ISHIBASHI YOJI , HASHIMOTO TAKASHI , INOUE HIROSHI , KATO FUMIO , OMORI TAKASHI , AKATSU SHIGEYUKI , KURODA MICHIO
IPC分类号： F23R3/02 , F23R3/34
摘要： PURPOSE:To stably burn a premixed flame on the side of a dilute mixed gas under a high-speed condition by providing a barrier member with respect to a premixed gas flow in the vicinity of an outlet part of an annular premixed flow passage thereby to form a stable flame in a recirculation flow region at the downstream of the barrier member. CONSTITUTION:An annular flow passage formed by an inner peripheral flow passage wall 6 and an outer peripheral flow passage wall 6 of the burner is partitioned peripherally by a flame holding plate 7. A second stage fuel is supplied to respective partitioned flow passages, and a premixed gas is supplied to a main chamber combustion cylinder 1. Further, a flame holding plate 7 at the outlet part of the annular flow passage is tapered toward the side of the inner peripheral flow passage wall, and a barrier member 8 is provided at the downstream inner peripheral flow-passage wall of the flame holding plate 7. This barrier member 8 is provided over the entire periphery of the inner peripheral flow passage wall. Thereby, immediately after passing of a part of the premixed gas flow along the inner peripheral flow passage wall 5 through the barrier member 8, the flow passage rapidly expands to create an exfoliation and to form a recirculation flow. In this recirculation flow, a stable small flame is formed since the staying time of the premixed gas is long, thus the stability of the main flow flame being improved.

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