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1. 发明专利

JPH07243622A GAS BURNER OF COMBUSTOR 失效
公开(公告)号：JPH07243622A
公开(公告)日：1995-09-19
申请号：JP3829494
申请日：1994-03-09
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： MASAI TADAHISA , SATO ISAO
IPC分类号： F23D14/22 , F23D14/58 , F23D14/74
摘要： PURPOSE:To provide a burner which allows the diameter of a throttle hole, i.e., a passageway for flame-holding gas, to be greater than the limiting diameter against choking and effects the combustion in a stabilized state without involving choking of the nozzle hole or an unbalance in the circular spread of the ejected gas. CONSTITUTION:Inside a manifold 14 a flame-holding gas chamber 13 it provided adjacently to a gas chamber 2. The flame-holding gas chamber 13 and the gas chamber 2 are connected by throttle holes. Flame-holding fuel gas is fed from the flame-holding gas chamber 13 toward the flame-holding gas nozzle holes of a plurality of fuel nozzles 15.

2. 发明专利

JPH0634135A BURNER 失效
公开(公告)号：JPH0634135A
公开(公告)日：1994-02-08
申请号：JP18970492
申请日：1992-07-16
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： MASAI TADAHISA , KUMADA KAZUHIKO , ISHIBASHI YOJI
IPC分类号： F23R3/28 , F23R3/30
摘要： PURPOSE:To expedite mixture of premixed combustion air and fuel without increasing a burner itself. CONSTITUTION:A premixing chamber 13 of a premixed combustion burner 17 has a combustion air inlet 22 opened in a direction of a downstream of an injecting direction of premixed gas 59 as a reference, and a channel of U-shaped longitudinal section directed in the direction of an upstream at a predetermined distance from the injecting direction of the gas 59 from the inlet 22 as a reference and connected to a premixed gas injection port 56 directed in the direction of a downstream therefrom. A fuel injection nozzle 35 for injecting fuel 14 is provided in the channel directed from the inlet 22 of the chamber 13 upward.

3. 发明专利

JPH07190367A FUEL NOZZLE FOR COMBUSTION OF GASEOUS FUEL 失效
公开(公告)号：JPH07190367A
公开(公告)日：1995-07-28
申请号：JP33489193
申请日：1993-12-28
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： MASAI TADAHISA , KOBAYASHI SHIGEYOSHI , SATO ISAO
IPC分类号： F23R3/18 , F23R3/28
摘要： PURPOSE:To enlarge the range of stable combustion, by a method wherein a flame-holding ring is formed so as to intersect perpendicularly to air-flow and flame-holding fuel flows at the rear of the flame-holding ring. CONSTITUTION:Air-flow 12 flows-in through an opening 13 for main combustion air, following which part of the flow of air is dammed by a flame-holding ring 11 intersecting perpendicularly to the air-flow 12 and having a L-shaped cross section. At this time, the flow of the air peels off at the point part (a) of the flame-holding ring 11, and a vortex occurs to the downstream side thereof. The strength of the vortex depends on the speed of the air-flow 12, and the faster the speed is, the stronger the vortex becomes. Stable flames can be formed by supplying flame-holding fuel to this vortex part through flame- holding gas jets 3 at the rear of the flame-holding ring 11, independent of gaseous fuel 1 through main gas jets. In this way, the range of stable combustion can be enlarged.

4. 发明专利

JPH06101840A PREMIXING STRUCTURE FOR GAS TURBINE COMBUSTOR 失效
公开(公告)号：JPH06101840A
公开(公告)日：1994-04-12
申请号：JP24982792
申请日：1992-09-18
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： MASAI TADAHISA , FUJIMURA HIDEKAZU , SATO ISAO , NAKAMURA SHOZO
IPC分类号： F23R3/28 , F23R3/30
摘要： PURPOSE:To provide an effective premixing structure being fundamental arts through which premixture air and fuel are uniformly mixed together when premixed combustion is executed to suppress the production of NOx owing to a gas turbine combustor. CONSTITUTION:At a premixing burner 11 port arranged in a single stage or a multistage, an annular premixing passage 10 at each stage is divided into a plurality of sections by means of a hollow member 7 or the hollow member 7 and a partition plate to reduce a hydraulic diameter, and a plurality of fuel gas injection nozzles are arranged on both sides of the hollow member 7. Fuel is fed to a hollow part 8 of a hollow member to feed fuel responding to a local premixed air flow rate of the divided premixing passage 10, and mixture is promoted by the reduction part of the premixing passage 10 formed of a hollow member 7.

5. 发明专利

JPH0835617A INJECTION FLOW MIXING METHOD OF FLUID 失效
公开(公告)号：JPH0835617A
公开(公告)日：1996-02-06
申请号：JP17229394
申请日：1994-07-25
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： MASAI TADAHISA , FUJIMURA HIDEKAZU
IPC分类号： F23D11/38
摘要： PURPOSE:To execute a wide dispersion of an injection flow in an initial condition in a main flow by supplying the injection flow with an inclination to the right or to the left, in the height direction of a path section, in order to utilize characteristics wherein the injection flow is made to disperse to a lateral direction by the main flow in the path section where the main flow runs. CONSTITUTION:On one side of a rectangular duct, a plurality of injection flow opening sections 4 are formed with an inclination against an injection opening face 19. Flow direction 17 of a main flow gas is orthogonal to the paper face. The injection flow has a Y' axis by its rotation at alpha degree to the right from the Y axis, as a flow direction of the injection flow. By executing an alpha degree rotation of the injection flow axis, the spread of the injection flow in the Z direction becomes large, so the injection flow spreads in the Z' axis direction. By increasing an angle alpha, since a spread to the Y axis direction is increased dispersion of the injection flow, for example, of a mixture gas in the Y axis direction is greatly improved.

6. 发明专利

JPH07190370A HYBRID TYPE COMBUSTOR FOR COMBUSTION OF GASEOUS FUEL 失效
公开(公告)号：JPH07190370A
公开(公告)日：1995-07-28
申请号：JP33489293
申请日：1993-12-28
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： MASAI TADAHISA , KOBAYASHI SHIGEYOSHI , SATO ISAO
IPC分类号： F23R3/30 , F23R3/34
摘要： PURPOSE:To uniformize the temperature of combustion gas, and to attain the reduction of NOx, by a method wherein a plurality of diffusion jets are provided between a plurality of premix openings partitioned and on the inner or outer surface of the premix openings, and diffusion flames are divided. CONSTITUTION:A plurality of second-stage premix openings 34 each are partitioned by a plurality of second-stage diffusion partitions 35, and a plurality of first-stage premix openings 37 each are partitioned by a plurality of first- stage diffusion partitions 38. The second-stage diffusion partitions 35 and the first-stage diffusion partitions 38 are composed of double walls, and passages for diffusion fuel to be supplied through diffusion fuel supply passages provided in a second-stage inside wall 26 and in a first-stage inside wall 39 are formed. On the other hand, a plurality of central air holes 40 are formed on a central air tube 41, and a plurality of louvers 42 for the central air tube are provided for cooling of the point thereof. In this way, the temperature of combustion gas can be uniformized and the reduction of NOx can be attained by dividing of diffusion flames.

7. 发明专利

JPH06281146A BURNER FOR COMBUSTOR 失效
公开(公告)号：JPH06281146A
公开(公告)日：1994-10-07
申请号：JP7181193
申请日：1993-03-30
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： ISHIBASHI YOJI , IWAI KAZUMI , INNAMI TAMIO , HAYASHI NORIYUKI , INOUE HIROSHI , YOSHIDA SHOHEI , AKATSU SHIGEYUKI , SASAO TOSHIBUMI , AZUHATA SHIGERU , ITO KAZUYUKI , MASAI TADAHISA , SATO ISAO
IPC分类号： F23R3/20 , F23R3/28
摘要： PURPOSE:To reduce NOx and the combustion vibration by rapidly promoting the diffusion of a fuel and air by a method wherein a second fuel injection port is arranged on the upstream side of a fuel injection port on the peripheral surface of a nozzle, and a flame holder is arranged on the upstream side of the second fuel injection port. CONSTITUTION:A combustor is equipped with an outer cylinder 11 and cover 12, and is arranged between a turbine casing 10 and compressor casing 26. Also, the combustor is constituted to be a two stage model with a plurality of burners 5A, 7A. In addition. the respective burners 5A, 7A are constituted of respective nozzles 5, 6 and combustion air passages 2, 3. In the meantime, a combustion chamber 1 which is surrounded by a combustion cylinder 4 is formed, and a flame holder 8 is arranged at the exit of the second stage burner 7A. Then, a primary fuel feeding pipe 21 is arranged at the center of the first stage nozzle 5 to divide a secondary fuel feeding passage 22, and at the same time, a first stage fuel 201 which is fed from the secondary fuel feeding passage 22 is fed into a fuel-air stream from a secondary fuel injection port 24.

8. 发明专利

JPH06281144A GAS TURBINE BURNER 失效
公开(公告)号：JPH06281144A
公开(公告)日：1994-10-07
申请号：JP6980893
申请日：1993-03-29
申请人： HITACHI ENG CO LTD , HITACHI LTD
发明人： MASAI TADAHISA , AZUHATA SHIGERU , SATO ISAO , IWAI KAZUMI
IPC分类号： F23R3/06
摘要： PURPOSE:To lower the transformation into NOx of a gas turbine, unify the temperature distribution of a gas at the exit of a burner, and improve the efficiency of the combustion for a gas turbine burner. CONSTITUTION:On a liner 9 of a gas turbine burner, a plurality of combustion air holes 17 are arranged in series with high temperature combustion gas stream lines 19 which are formed in the liner 9 in a plurality of rows in such a manner that the central axis extension line of the combustion air hole 17 may penetrate respectively the same stream line of the high temperature combustion gas stream line 19 for each row. Diluted air holes 18 are also arranged at the downstream side of a high temperature combustion gas stream 21 in the liner 9 in the exactly same manner as the case of combustion air holes 17. Then, both the combustion air holes 17 and diluted air holes 18, a pitch for the plurality of air holes is kept to be 3 times or less of the diameter of the air hole respectively, and the diameter of an air hole which is located to be adjacent on the downstream side is kept to be 1.3 times or less of the diameter of an air hole which is located on the upstream side.

9. 发明专利

JPH06101841A AIR-FUEL PREMIXING STRUCTURE FOR GAS TURBINE COMBUSTOR 失效
公开(公告)号：JPH06101841A
公开(公告)日：1994-04-12
申请号：JP25117892
申请日：1992-09-21
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： MASAI TADAHISA , IWAI KAZUMI , KUMADA KAZUHIKO
IPC分类号： F23R3/28 , F23R3/30
摘要： PURPOSE:To provide an effective structure being a basic technology through which premixing of the air and fuel is carried out at the time when premixed combustion is executed to suppress the production of NOx by a gas turbine combustor. CONSTITUTION:In a premixing burner port 10 arranged in a single stage or a multistage, an annular pre-mixture passage 8 in each stage is divided into a plurality of sections by means of an air foil 9 and a partition plate. Through lengthening in a radial direction of a fuel nozzle simultaneously with acceleration and deceleration of pre-mixture air and fuel gas in a pre-mixture passage 8 by means of the air foil 9, a plurality of fuel gas injection nozzles 13, arranged to both sides of a fuel nozzle, are caused to change a pitch or a nozzle diameter so as to match with a local premixed air amount, and an ideal fuel-air premixing can be carried out.

10. 发明专利

JPH0650537A PREMIXING METHOD IN LOW NOX PREMIXING COMBUSTION DEVICE 失效
公开(公告)号：JPH0650537A
公开(公告)日：1994-02-22
申请号：JP20512192
申请日：1992-07-31
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： MASAI TADAHISA , KUMADA KAZUHIKO , IWAI KAZUMI
IPC分类号： F23R3/02 , F23R3/30 , F23R3/34
摘要： PURPOSE:To provide a premixing method for a gas turbine combustion device capable of getting a quite uniform premixed gas through its dispersion mixing and further capable of accomplishing a substantial low NOx operation. CONSTITUTION:A hollow member 31 is installed in a premixing passage 30 in which a combustion injection flow 40 of premixed fuel and premixed air 7 are dispersed and mixed to each other so as to divide the premixing passage 30. Both side surfaces of the hollow member 31 are provided with mixing and dispersion air openings 32, a mixed dispersion air flow 41 is injected into the premixing passage 30, it is crossed at a right angle with the premixed fuel and premixed air flow to promote the dispersion and mixing to each other and further to get a uniform premixed air. Accordingly, as regards a low NOx formation in a gas turbine combustion device, the premixing combustion is carried out with excessive amount of air so as to decrease a temperature of flame, although in the case that the premixed gas has a difference in concentration, the partial high temperature flame is generated and a low NOx formation can not be attained as expected. With such an arrangement as above, since a quite uniform premixed gas can be attained, a substantial low NOx can be realized.

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