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81. 发明专利

JPS5179811A 失效
公开(公告)号：JPS5179811A
公开(公告)日：1976-07-12
申请号：JP441875
申请日：1975-01-08
申请人： HITACHI LTD
发明人： TSUKAHARA SATOSHI , SATO ISAO , ISHIBASHI YOJI
IPC分类号： F23L9/02 , F23C99/00 , F23R3/02 , F23R3/26

82. 发明专利

JPH08178291A GAS TURBINE BURNER 失效
公开(公告)号：JPH08178291A
公开(公告)日：1996-07-12
申请号：JP32663494
申请日：1994-12-28
申请人： HITACHI LTD
发明人： TSUKAHARA SATOSHI , KOIZUMI HIROMI , SASAO TOSHIBUMI , IWAI KAZUMI
IPC分类号： F23R3/20 , F23R3/28 , F23R3/30 , F23R3/34
摘要： PURPOSE: To provide a method for burning for generating less NOx and the structure therefor. CONSTITUTION: Diffusion burning first fuel nozzle 131 and a swirler 151 are provided at the center of the end of an inner cylinder 181. Annular premixing chambers 152, 153 and fuel supply fuel nozzles 132, 133 are provided at the outer periphery to stably burn dilute premixed gas by flame stabilizers 162, 163. Premixing fuel supply fourth fuel nozzle 135 is provided at the outer peripheral air passage of an inner cylinder 182, and fuel is premixed with the cooling air of the air cylinder. As a result, fuel air ratio or flame temperature can be reduced in the burning area of the upstream side of the inner cylinder, thereby largely reducing NOx.

83. 发明专利

JPH06193472A GAS TURBINE SYSTEM 失效
公开(公告)号：JPH06193472A
公开(公告)日：1994-07-12
申请号：JP34389092
申请日：1992-12-24
申请人： HITACHI LTD
发明人： KIRIKAMI SEIICHI , KURODA MICHIO , TSUKAHARA SATOSHI
IPC分类号： F02C7/22 , F02C9/40
摘要： PURPOSE:To restrain the production of NOx in a whole operation range of a gas turbine by feeding fuel which produces a less volume of NOx, into a diffusion burning part, and by feeding fuel which produces a large volume of NOx, into a premixture burning part. CONSTITUTION:Methanol and LNG are stored in fuel tanks 1, 2, respectively. Further, these fuels are fed by means of fuel pumps 3, 4 through a carburetor 5 into a burner 7 in a gas turbine 6. The burner 7 is composed of a diffusion fuel nozzle 8, a premixing fuel nozzle 9, and a combustion cylinder 10, as main components. At the time of starting the gas turbine 6, methanol is fed into the diffusion fuel nozzle 8 so as to be burnt. Meanwhile, upon change-over of load to the gas turbine, LNG is fed to the premixing fuel nozzle 9 so as to ignite and burn the methanol by flame 11. Thereafter, the flow rate of methanol is gradually decreased while the flow rate of the LNG is gradually increased. Thereby it is possible to restrain the production of NOx in a whole operation range of the gas turbine.

84. 发明专利

JPH06147483A FUEL NOZZLE FOR GAS TURBINE BURNER 失效
公开(公告)号：JPH06147483A
公开(公告)日：1994-05-27
申请号：JP29241492
申请日：1992-10-30
申请人： HITACHI LTD
发明人： KOIZUMI HIROMI , IWAI KAZUMI , TSUKAHARA SATOSHI , SASAO TOSHIBUMI , AZUHATA SHIGERU , ITO KAZUYUKI
IPC分类号： F23R3/16 , F23R3/30
摘要： PURPOSE:To suppress generation quantity of NOX by using part of main premixing gas as auxiliary fuel of a pilot flame, and so providing a nozzle injection port for the auxiliary fuel as to be disposed to an outer or inner peripheral side of the main nozzle injection port. CONSTITUTION:A supply unit for forming premixing gas by mixing fuel 9 and burning air 11 is provided at a fuel nozzle inlet. The premixing gas formed thereat is divided to main premixing gas flowing to a center of the nozzle and premixing gas for pilot to be supplied to its outer periphery through an orifice 16. An injection port 18 for injecting the main premixing gas is provided at a center of the nozzle, and an injection port 17 for the pilot is provided at an outer or inner peripheral side adjacent to the port 18. Since the pilot flame applies heat to a base of main premixing flame, flame stabilizing performance is improved.

85. 发明专利

JPH06147418A FUEL INJECTION VALVE 失效
公开(公告)号：JPH06147418A
公开(公告)日：1994-05-27
申请号：JP29241392
申请日：1992-10-30
申请人： HITACHI LTD
发明人： TSUKAHARA SATOSHI , YOKOTA OSAMU , KIRIKAMI SEIICHI , NARATO KIYOSHI
IPC分类号： F02C7/232 , F23D11/38 , F23R3/28
摘要： PURPOSE:To improve injection performance by providing a gas injection nozzle having a nozzle end face intersecting a center axis of the injection nozzle at an acute angle. CONSTITUTION:The title fuel injection valve comprises an inner cylinder 1 forming a liquid fuel passage 3 for conducting liquid fuel and an outer cylinder 2 forming an air passage 4 for conducting air which functions as an atomizing medium. The inner cylinder 1 is provided with a fuel injection nozzle 5, and the outer cylinder 2 with a gas injection nozzle 6. The gas injection nozzle 6 is machined such as to have an angle of theta with regard to the outer cylinder 2. The fuel injection nozzle 5 is provided such that fuel is injected to collide with a theta-angled wall face so as to atomize most of the injected fuel at a sharp edge face having the angle of theta. Thus, the injection performance is improved by effectively carrying out liquid film separation at the sharp edge face of the gas injection nozzle 6 with liquid film shearing effect raised by gas.

86. 发明专利

JPH05195821A COMBUSTOR 失效
公开(公告)号：JPH05195821A
公开(公告)日：1993-08-03
申请号：JP615192
申请日：1992-01-17
申请人： HITACHI LTD
发明人： INNAMI TAMIO , SASAO TOSHIBUMI , INOUE HIROSHI , YOSHIDA SHOHEI , TSUKAHARA SATOSHI , OTAWARA YASUHIKO , KURODA MICHIO
IPC分类号： F02C9/28
摘要： PURPOSE:To attain lean-combustion where fuel concentration of premixture air is thinned to the utmost, and suppress generation of nitrogen oxide so as to maintain a stable lean combustion condition, since reduction in nitrogen oxide included in combustion exhaust gas in the premixture combustor of a gas turbine and the like is required keenly. CONSTITUTION:Premixture air-fuel concentration of a mixing chamber 8 is detected, and the exhaust hole 34 of a local fuel leading-in mechanism is provided on the auxiliary chamber 4 side outlet end of the mixing chamber 8. The amount of local fuel supplied from the exhaust hole 34 is adjusted moderately, and thereby, pre-mixture air fuel concentration of the outlet of the mixing chamber 8 is concentrated in a local part. It is thus possible to maintain a stable combustion condition even if secondary premixture air is in a lean side. As a result, it is possible to suppress forming of nitrogen oxide in combustion exhaust gas, and to widen a pre-mixture combustion range toward fuel concentration lean side especially.

87. 发明专利

JPH05106806A COMBUSTION METHOD AND COMBUSTION APPARATUS 失效
公开(公告)号：JPH05106806A
公开(公告)日：1993-04-27
申请号：JP17031291
申请日：1991-06-17
申请人： HITACHI LTD
发明人： TANIGUCHI MASAYUKI , AZUHATA SHIGERU , MURAKAMI TADATAKA , KOBAYASHI YOSHINOBU , NARATO KIYOSHI , KURODA MICHIO , KIRIKAMI SEIICHI , TSUKAHARA SATOSHI
IPC分类号： F02C9/28 , F23C1/00 , F23D11/12 , F23R3/30
摘要： PURPOSE:To obtain an optimum combustion method for reducing NOx generation when two or more sorts of fuel including evaporation-retardant liquid fuel are used. CONSTITUTION:Low-boiling-point fuel 16 and high-boiling-point fuel 15 are respectively mixed with combustion air 20 and sprayed into a combustion chamber through spouts 25. Almost low-boiling-point fuel 16 evaporates in a mixing chamber 8 and turns into a flammable pre-mixed gas 21 before the combustion air is spouted into the combustion chamber through the spout 25. A flame stabilizer 17 is installed near the spout 25 on the flow path of the low-boiling- point fuel 16 between two flow paths of the combustion air 20. Therefore, the low-boiling-point fuel is ignited near the flame stabilizer 17 to form a pre-mix flame 22 which is propagated toward the opposite side of the spouting flow, that is, toward the airflow containing the high-boiling-point fuel 15. As a result, pre-mix combustion can be performed and NOx generation can be reduced without a reduction in combustion efficiency even when evaporation-retardant fuel is used.

88. 发明专利

JPH04371718A COOLING STRUCTURE FOR GAS TURBINE BURNER 失效
公开(公告)号：JPH04371718A
公开(公告)日：1992-12-24
申请号：JP14839791
申请日：1991-06-20
申请人： HITACHI LTD
发明人： INOUE HIROSHI , HAYASHI NORIYUKI , TSUKAHARA SATOSHI , IWAI KAZUMI
IPC分类号： F23R3/08
摘要： PURPOSE:To provide a cooling structure of a gas turbine burner which is capable of exerting the maximum performances of forced convection cooling by cooling air flowing in an air flow passage inside a structural member which forms a burner and forced convection cooling by air to be supplied in the burner without increasing pressure loss in the burner and maintaining the performance of film cooling as well. CONSTITUTION:Cooling operations are carried out, which comprise forced convection cooling of air 101 to be supplied into a burner and forced convection cooling of cooling air 101 flowing in an air flow passage 2 installed inside a structural member 1 which forms the burner and further film cooling where film cooling air 105 flows along the burner in a smooth and filmy manner on the side of combustion gas 102. The structural member 1 is designed to be thick only in the portion where the air flow passage 2 is provided and thin in the intermediate part.

89. 发明专利

JPH0350090B2 失效
公开(公告)号：JPH0350090B2
公开(公告)日：1991-07-31
申请号：JP20140089
申请日：1989-08-04
申请人： HITACHI LTD
发明人： FUJIMURA HIDEKAZU , TSUKAHARA SATOSHI , SUGITA NARIHISA
IPC分类号： F02C3/28 , F02C9/40

90. 发明专利

JPH0315502A GAS TURBINE COMBUSTOR 失效
公开(公告)号：JPH0315502A
公开(公告)日：1991-01-23
申请号：JP17902088
申请日：1988-07-20
申请人： HITACHI LTD
发明人： SEGAWA YORIHIDE , TSUKAHARA SATOSHI , ISHIBASHI YOJI , ARAI TORU
IPC分类号： B28B1/26
摘要： PURPOSE:To simply and effectively reduce combustion vibration by forming the wall face of a device near a fuel nozzle where combustion gas is passing in a rough face. CONSTITUTION:A fuel nozzle 3 and a swivel unit 2 surrounding the nozzle 3 are provided at the upstream end of a gas turbine burner 1. Latticelike grooves crossing in two directions, i.e., filed face 5 is formed on a device wall face 4 near the nozzle 3 of the burner 1 in a rough face. When combustion vibration is generated based on a swivel flow, its cause is a vortex layer generated by the swivel flow since the face 4 near the nozzle 3 is smooth, and self-excited vibration generated by mutual action of the vortex layer with an elastic material to become the wall of the burner. Here, when the face 4 is formed in a filed face 5, its surface friction is increased, and the vortex layer is not generated even by the swivel flow. Thus, there is not mutual action with the elastic material to become the wall of the combustor, thereby eliminating combustion vibration.

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