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101. 发明专利

JP2004012039A GAS TURBINE COMBUSTOR 审中-公开
公开(公告)号：JP2004012039A
公开(公告)日：2004-01-15
申请号：JP2002166942
申请日：2002-06-07
申请人： HITACHI LTD
发明人： HIRATA YOSHITAKA , YOSHIDA SHOHEI , ITO KAZUYUKI , MUROTA TOMOYA
IPC分类号： F23R3/34 , F02C7/232 , F02C9/28 , F23R3/28 , F23R3/32
摘要： PROBLEM TO BE SOLVED: To provide a gas turbine combustor using a premix and prevaporization lean combustion method for preventing generation of an autoignition phenomenon in a premixer over the overall load zone of a gas turbine and supplying sufficiently vaporized fuel to a combustion chamber. SOLUTION: This gas turbine combustor supplying combustion gas to a turbine wheel in the gas turbine is provided with a substantially cylindrical combustor inner cylinder 2 forming the combustion chamber inside, a diffusion combustion burner 10 arranged on the upstream side of the combustion chamber and having a diffusion fuel nozzle 11 directly jetting fuel into the combustion chamber, the premixer 21 mixing the vaporized fuel and air together on the inside, a low-load premix fuel nozzle 23 arranged inside the premixer 21, and a prevaporization premixing combustion burner 20 having a high-load premix fuel nozzle 22, in which a fuel jetting position is positioned on the downstream side beyond the low-load premixing fuel nozzle 23 inside the premixer 21. COPYRIGHT: (C)2004,JPO

102. 发明专利

JP2004003730A Fuel injection nozzle for gas turbine combustor 审中-公开
公开(公告)号：JP2004003730A
公开(公告)日：2004-01-08
申请号：JP2002159232
申请日：2002-05-31
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ITO KAZUYUKI , TAKEHARA ISAO , YOSHIDA SHOHEI , HIRATA YOSHITAKA
IPC分类号： F23R3/28 , F23R3/30
摘要： PROBLEM TO BE SOLVED: To provide a fuel injection nozzle for gas turbine combustor for diffusion combustion which reduces a NOx exhaust amount without complicating the structure and operation method of the combustor.
SOLUTION: The fuel injection nozzle for gas turbine combustor which injects diffusion fuel into a combustion chamber of the gas turbine combustor is provided with: an outer cylinder 6 almost in the shape of a cylinder arranged facing into the combustion chamber; a fuel injection hole 17 on the outer circumferential side provided at the tip end of this outer cylinder 6 facing the combustion chamber; an inner cylinder 7 almost in the shape of a cylinder arranged facing the combustion chamber; a fuel injection hole 13 on the inner circumferential side provided at the tip end of this inner cylinder 7 facing the combustion chamber; and a small diameter 12 for flow passage resistance provided on the side of the inner cylinder 7 with an opening area smaller than the inner circumferential side fuel injection hole 13.
COPYRIGHT: (C)2004,JPO

103. 发明专利

JP2000346362A GAS TURBINE COMBUSTOR, AND COMBUSTION METHOD FOR GAS TURBINE COMBUSTOR 失效
公开(公告)号：JP2000346362A
公开(公告)日：2000-12-15
申请号：JP15463999
申请日：1999-06-02
申请人： HITACHI LTD
发明人： MUROTA TOMOYA , OTSUKA MASAYA , YOSHIDA SHOHEI , HIRATA YOSHITAKA
IPC分类号： F23R3/48
摘要： PROBLEM TO BE SOLVED: To reduce the vibration in combustion occurring between a plurality of combustors. SOLUTION: This is a gas turbine combustor which is equipped with a plurality of combustors arranged in an annular form and producing combustion gas and a plurality of communication passages for connecting the adjacent combustors of the plurality of the combustors so that the fluid can flow, and at least one of the communication passages is made to be a communication passage having flow resistances differing according to the flow direction. Hereby, the vibration in combustion is reduced, and this combustor can perform stable combustion.

104. 发明专利

JP2000291448A GAS TURBINE COMBUSTION DEVICE AND FLAME BACKFLOW DETECTING METHOD 失效
公开(公告)号：JP2000291448A
公开(公告)日：2000-10-17
申请号：JP9485499
申请日：1999-04-01
申请人： HITACHI LTD
发明人： YOSHIDA SHOHEI , HIRATA YOSHITAKA , OTSUKA MASAYA , MUROTA TOMOYA , KOBAYASHI SHIGEYOSHI , INOUE HIROSHI , MORIWAKI BUNJI
IPC分类号： F02C9/00 , F02C9/28 , F23R3/00
摘要： PROBLEM TO BE SOLVED: To sufficiently prevent burnout of a premixing burner by instantaneously detecting that flame flows back to the burner. SOLUTION: A gas turbine combustion device having a diffuse combustion burner arranged in the axial central part of a combustion chamber, a diffusion fuel supplying system for supplying fuel to the diffuse combustion burner, a premixing combustion burner arranged around the diffuse combustion burner, and a premixing fuel supplying system for supplying fuel to the premixing combustion burner is provided with a pressure-detecting device 19 for detecting pressure in a combustor, a flame backflow deciding device 21 for deciding that the flame flows back to the inside of the burner on the basis of an output signal of the pressure detecting device, and a fuel control device 22 for controlling the supplying flow rate of the diffusion fuel supplying system and the premixing fuel supplying system on the basis of a decided output signal of the flame backflow deciding device.

105. 发明专利

JP2000097435A GAS TURBINE COMBUSTOR 失效
公开(公告)号：JP2000097435A
公开(公告)日：2000-04-04
申请号：JP27091298
申请日：1998-09-25
申请人： HITACHI LTD
发明人： YOSHIDA SHOHEI , HIRATA YOSHITAKA , OTSUKA MASAYA , MUROTA TOMOYA , KOGANEZAWA TOMOKI
IPC分类号： F02C9/34 , F23R3/28 , F23R3/32
摘要： PROBLEM TO BE SOLVED: To prevent an ignition of a diffusion burner of each combustor from being delayed at the time of a shutoff operation due to replacement of a fuel in a diffusion fuel piping with combustion air or combustion gas during a total premixed combustion operation. SOLUTION: Each of premixed fuel pipes of combustors and a diffusion fuel pipe are made to communicate with each other by a communication pipe 23, and flow regulating mechanisms 16, 20 and a check valve 25 are installed in the communication pipe. A fuel is supplied from the premixed fuel pipes to the diffusion fuel pipe by such an amount as to cause no ignition of a diffusion fuel nozzle 12 at the time of a total premixed fuel combustion operation. Therefore, since fuel flow rate supplied from the premixed fuel pipes of the combustors to the diffusion fuel pipe can be controlled in such a manner as to cause no ignition of the diffusion fuel nozzle 12, replacement of an interior of a diffusion fuel supply system 19 with combustion air or the like at the time of the total premixed fuel combustion operation so that ignition of the diffusion combustion nozzle 12 is prevented from being delayed at the time of a load shutoff operation.

106. 发明专利

JP2000055318A COMBUSTOR 失效
公开(公告)号：JP2000055318A
公开(公告)日：2000-02-22
申请号：JP22580698
申请日：1998-08-10
申请人： HITACHI LTD
发明人： OTSUKA MASAYA , YOSHIDA SHOHEI , MUROTA TOMOYA , HIRATA YOSHITAKA
IPC分类号： F02C7/24 , F23C15/00 , F23D14/22 , F23R3/00 , F23R3/28 , F23C11/04
摘要： PROBLEM TO BE SOLVED: To provide a combustor, simple in constitution, inexpensive in cost and reduced in combustion vibration or combustion noise generated upon combustion. SOLUTION: A combustor is provided with a combustion chamber 1, a fuel supplying pipeline 12 for supplying fuel into the combustion chamber 1 and an oxidizing agent supplying pipeline for supplying oxidizing agent into the combustion chamber 1 to mix the fuel and oxidizing agent, supplied through respective supplying pipelines, and burn the mixture. In such a combustor, a sound resonance mode generating means 23, fluctuated with a frequency same as the pressure fluctuation in the combustion chamber 1 and making a flow speed fluctuation at the outlet port of combustion chamber side of the fuel supplying pipeline 12 zero, is provided in the fuel supplying pipeline 12.

107. 发明专利

JPH11344224A GAS TURBINE COMBUSTOR 失效
公开(公告)号：JPH11344224A
公开(公告)日：1999-12-14
申请号：JP15250798
申请日：1998-06-02
申请人： HITACHI LTD
发明人： MUROTA TOMOYA , OTSUKA MASAYA , YOSHIDA SHOHEI , HIRATA YOSHITAKA
IPC分类号： F23R3/18 , F23R3/32 , F23R3/34
摘要： PROBLEM TO BE SOLVED: To suppress a high frequency vibration and to prevent a combustion pulsating by disposing a flame stabilizer and a combustion chamber so that an axis and an angle invariable with respect to a rotation do not exist for all angles to satisfy specific conditions, thereby asymmetrically distributing a flame in the chamber and reducing a low frequency vibration. SOLUTION: In the gas turbine combustor comprising a flame stabilizer for stabilizing a flame by forming a circulating flow, a combustion chamber and the stabilizer are disposed so that a central axis and an angle of a rotation to become substantially equal to those before they are rotatably moved do not exist in the case of rotatably moving the chamber and the stabilizer at an angle to become 360 degrees at the time of multiplying a natural number of 3 or more at a specific axis as a center. That is, an obstacle flame stabilizer 101 of an axis symmetrical shape is disposed in a cylindrical combustion chamber 103 so that its symmetrical axis does not coincide with a central axis 106 of the chamber. Unburned gas 107 and an already burned gas 108 are not distributed to an axis symmetrical at the axis 106 as a center, and a converging of a reflected pressure wave to the axis 106 is eliminated.

108. 发明专利

JPH10300088A FLAME HOLDING STRUCTURE OF COMBUSTOR 失效
公开(公告)号：JPH10300088A
公开(公告)日：1998-11-13
申请号：JP10569697
申请日：1997-04-23
申请人： HITACHI LTD
发明人： OTSUKA MASAYA , YOSHIDA SHOHEI , MUROTA TOMOYA , HIRATA YOSHITAKA
IPC分类号： F23R3/18 , F23D14/74
摘要： PROBLEM TO BE SOLVED: To improve reliability of a combustor with a higher stability of flame by a method wherein passages are provided to link the front on the upstream side of a flame holder contacting a premixed gas unburned to the rear on the downstream side of the flame holder for holding the burned gas of the premixed gas to inhibit changes in a circulation flow generated on the rear of a flame holder. SOLUTION: A plurality of passages 17 are arranged inside a flame holder 10 to link the front 15 on the upstream side of the flame holder 10 contacting a premixed gas 9 unburned to the rear 16 on the downstream side of the flame holder for holding a burned gas of the premixed gas 9. The cross section of each passage is a hole in shape and the plurality of passages on the rear 16 of the flame holder are the same in the direction of outflow. At this point, as the premixed gas 9 flows into the rear 16 of the flame holder 10 passing through the passages 17, a flow circulating in the direction the same as the direction of outflow is intensified to make the flow on the rear of the flame holder 10 asymmetrical. This reduces the circulation flow opposite to the direction of outflow of the passages 17, thereby inhibiting changes in the circulation flow as caused by the generation of an alternating flow.

109. 发明专利

JPH09236261A GAS TURBINE COMBUSTOR 失效
公开(公告)号：JPH09236261A
公开(公告)日：1997-09-09
申请号：JP4092796
申请日：1996-02-28
申请人： HITACHI LTD
发明人： KOBAYASHI SHIGEYOSHI , OTAGURO TOSHIO , OTSUKA MASAYA , YOSHIDA SHOHEI , INOUE HIROSHI , KOGANEZAWA TOMOKI
IPC分类号： F02C9/28 , F23C99/00 , F23R3/00 , F23R3/16 , F23R3/26 , F23R3/32 , F23R3/34 , F23C11/00
摘要： PROBLEM TO BE SOLVED: To effectively suppress the pulsating combustion by analyzing the pulsating frequency by the physical amounts due to the detected pulsating combustion of a combustor, calculating a control signal to suppress the variation of the amount by the frequency, and exciting the speed change of one of the premixed gas or premixing combustion air by the signal. SOLUTION: A plurality of oscillating combustion detecting means 313 for detecting the physical amount due to the pulsating combustion are installed in a combustor main chamber outer cylinder 301. An electric signal 314 for representing the amount due to the combustion obtained by the means 313 is guided to control amount calculating means 315 installed out of the combustor. In this case, necessary control amount is obtained based on the frequency, and a control signal 316 is input to heat fluid exciting means 318 provided in a premixer or heat fluid exciting means 319 provided on the surface of a flame stabilizer. These exciting means excite the heating value change in the combustor by utilizing the hydrodynamic instability in the combustor, cancels the pulsating combustion originally existed to suppress the pulsating combustion.

110. 发明专利

JPH07332669A GAS TURBINE COMBUSTOR 失效
公开(公告)号：JPH07332669A
公开(公告)日：1995-12-22
申请号：JP13009494
申请日：1994-06-13
申请人： HITACHI LTD
发明人： INOUE HIROSHI , ISHIBASHI YOJI , YOSHIDA SHOHEI , KOGANEZAWA TOMOMI , AKATSU SHIGEYUKI , IWAI KAZUMI
IPC分类号： F23R3/06 , F23C3/00 , F23R3/30
摘要： PURPOSE:To rarefy a premixed gas by a method wherein a premixing passage air inlet is formed into a large number of small holes, and the air is dispersed to upstream and downstream premixing passage wall surfaces of a fuel nozzle. CONSTITUTION:A fuel 21 for premixing is jetted into an annular premixing apparatus 12 from a fuel nozzle 8. In the meantime, air 52 for premixed combustion is jetted from a large number of air holes 53 which are provided on the premixing apparatus, and flows into the premixing apparatus 12 as a jet stream, and is mixed with the fuel for premixing which is jetted from the fuel nozzle, and thus, a premixed gas is formed. By forming the premixed gas in this manner, not only a kinetic energy of the fuel but a kinetic energy of the air can also be utilized as an energy for the mixing, and for this reason, the mixing is accelerated, a uniform premixed gas can be obtained, and it is effective for the reduction of NOx.

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