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41. 发明专利

JPH05203148A GAS TURBINE COMBUSTION APPARATUS AND ITS CONTROL METHOD 失效
公开(公告)号：JPH05203148A
公开(公告)日：1993-08-10
申请号：JP364492
申请日：1992-01-13
申请人： HITACHI LTD
发明人： TSUKAHARA SATOSHI , INOUE HIROSHI , HAYASHI NORIYUKI , IWAI KAZUMI , INNAMI TAMIO , ISHIBASHI YOJI , KURODA MICHIO , OTAWARA YASUHIKO , IKEDA HIROSHI , ITO KAZUYUKI , NAKAMURA SHOZO , FUJIMURA HIDEKAZU , KOYAMA KAZUHITO
IPC分类号： F02C9/28 , F23R3/28 , F23R3/34
摘要： PURPOSE:To obtain a combustion method and construction for a gas turbine with less NOx generation. CONSTITUTION:A first fuel nozzle 105 and a swirler 155 for diffusion combustion are mounted at the center on the end of an inner drum 103, two or more annular pre-mixing chambers 123 and 124 are provided around the periphery of the swirler, and fuel supply nozzles 106 and 107 are respectively mounted in the pre-mixing chambers. Recess type flame stabilizers 121 and 122 are provided on the outer wall near the outlets of the pre-mixing chambers to enhance the combustion stability of pre-mixed gas. As a result, the major portion of fuel can be burned in dilute pre-mixed combustion with only a little portion of fuel burned in diffusion combustion, so that the NOx generation can be considerably reduced.

42. 发明专利

JPH05187637A COMBUSTION EQUIPMENT 失效
公开(公告)号：JPH05187637A
公开(公告)日：1993-07-27
申请号：JP364592
申请日：1992-01-13
申请人： HITACHI LTD
发明人： HAYASHI NORIYUKI , TSUKAHARA SATOSHI , IWAI KAZUMI , ISHIBASHI YOJI , AKATSU SHIGEYUKI , INOUE HIROSHI , OMORI TAKASHI , IKEDA HIROSHI , IIZUKA NOBUYUKI , SATO ISAO , OTAWARA YASUHIKO , KURODA MICHIO , ITO KAZUYUKI , NAKAMURA SHOZO , FUJIMURA HIDEKAZU , KOYAMA KAZUHITO
IPC分类号： F23R3/16 , F23R3/18 , F23R3/30
摘要： PURPOSE:To enable attainment of combustion of low NOx which is stable and free from the possibility of' burnout and backfire, by making a partition plate end inside a premixer and by making a part of a slanting part of a flame stabilizer form a flow passage inside the premixer. CONSTITUTION:A partition plate 9 or a swirler 6 is made to end in the middle inside a premixer 4 and a slanting part 6a of a flame stabilizer 6 located on the downstream side thereof is extended from just behind the partition plate 9 or the swirler 5 in the premixer 4 to a sharply expanded part surface 6b of the flame stabilizer 6. According to this constitution, the sectional area of a flow passage in the premixer 4 through which air-fuel premixture AF flows decreases little by little on the downstream side of the partition plate 9 or the swirler 5. Accordingly, unstable combustion due to fire spread to a region just behind the partition plate or the swirler or retention of flame therein is eliminated.

43. 发明专利

JPH05187270A OPERATION METHOD FOR GAS TURBINE COMBUSTOR 失效
公开(公告)号：JPH05187270A
公开(公告)日：1993-07-27
申请号：JP364792
申请日：1992-01-13
申请人： HITACHI LTD
发明人： ISHIBASHI YOJI , IWAI KAZUMI , HAYASHI NORIYUKI , TSUKAHARA SATOSHI , INOUE HIROSHI , KATO FUMIO , OMORI TAKASHI , AKATSU SHIGEYUKI , KURODA MICHIO , OTAWARA YASUHIKO , ITO KAZUYUKI
IPC分类号： F02C9/28
摘要： PURPOSE:To perform operation in a state to maintain a premixture flame in a constantly stable state, to perform combustion on a fuel lean condition, and to produce an effect to reduce the generation of NOx by measuring a fluctuating pressure in a combustor and controlling the combustion condition of a premixture flame so that the fluctuating pressure is prevented from exceeding a reference value. CONSTITUTION:A first stage combustion chamber 60 to effect diffusion combustion is arranged on the upper stream side of a combustor, a second stage combustion chamber 70 to effect premixture combustion is arranged on the downstream side thereof, and an annular premixer 4 is arranged on the outer peripheral side of a connection part therebetween. In the first stage combustion chamber, a diffusion flame is formed through the feed of first stage fuel and air-fuel premixture of second stage fuel is fed to the second stage combustion chamber on the downstream side to form a premixture flame.

44. 发明专利

JPH0470524B2 失效
公开(公告)号：JPH0470524B2
公开(公告)日：1992-11-11
申请号：JP2457387
申请日：1987-02-06
申请人： HITACHI LTD
发明人： IWAI KAZUMI , ARAI TOORU , KOIZUMI HIROMI , WADA KATSUO
IPC分类号： F23N1/02 , F23C99/00 , F23D14/24 , F23D17/00 , F23K5/00 , F23N5/00

45. 发明专利

JPH04203808A METHOD AND APPARATUS FOR CONTROLLING GAS TURBINE COMBUSTION DEVICE 失效
公开(公告)号：JPH04203808A
公开(公告)日：1992-07-24
申请号：JP32944590
申请日：1990-11-30
申请人： HITACHI LTD
发明人： INOUE HIROSHI , TSUKAHARA SATOSHI , IWAI KAZUMI
IPC分类号： F02C9/00 , F01D17/08 , F23R3/26
摘要： PURPOSE:To enable the most suitable combustion to be always carried out at all combustion devices even in the case that a gas turbine has a plurality of combustion devices by a method wherein either a turbine discharged gas temperature distribution or a turbine discharging gas concentration distribution is measured and a controlling amount of an air distribution adjusting device of each of the combustion devices is shifted from this distribution. CONSTITUTION:An indicating temperature of each of thermo-couples 36 is compared with a mean temperature of all thermo-couples. In the event that there is a high displacement from the mean value, an amount of shift Xs of a degree of opening of an air distribution adjusting valve 18 of each of the combustion devices is set. This amount of shift Xs is added to a standard value Xo of a combustion control device 19 and then a degree of opening X signal of an air adjusting valve is sent to an adjusting valve driving device 21. Operation at this shifting amount Xs is continuously carried out at a specified time interval tau. Due to this fact, an air distribution of each of the combustion devices is always kept at its most suitable value during an operation of the gas turbine. NOx or Co in each of the combustion devices or a discharged hydrocarbon of it is detected with a discharged gas temperature distribution measuring thermocouple 36 being applied as a discharged gas sensor and a degree of opening shifting amount Xs of an air distribution adjusting valve 18 of each of the combustion devices is set and then an air distribution of each of the combustion devices is always kept at its most suitable state.

46. 发明专利

JPH04124519A FUEL SPRAYING DEVICE FOR GAS TURBINE COMBUSTOR 失效
公开(公告)号：JPH04124519A
公开(公告)日：1992-04-24
申请号：JP24401190
申请日：1990-09-17
申请人： HITACHI LTD
发明人： HAYASHI NORIYUKI , TSUKAHARA SATOSHI , KOBAYASHI SHIGEYOSHI , IWAI KAZUMI
IPC分类号： F23R3/00
摘要： PURPOSE:To shorten a time, in which a compressor installed in a different place is run, as much as possible and to improve the thermal efficiency of the whole of a gas turbine by a method wherein a part of air fed to a burner is branched, and a steam system is connected to an air system where atomization of liquid fuel is promoted by means of air pressurized by the compressor installed in a different place. CONSTITUTION:A nozzle core 11 through which liquid fuel 101 is atomized is located to the central part of a fuel nozzle 1, the liquid fuel 101 is atomized at a vortex chamber 12, and injected as spray through a nozzle hole 13. A cone 15 to form a spray air flow passage 14 is located to the outer periphery of the nozzle hole. Steam 106 the pressure of which is increased in an exhaust heat recovery boiler 53 produces a high speed swirl by means of a spray swirler 16, the swirl being discharged through the nozzle hole 13. Since atomization is promoted, even when a compressor 54 installed in a different place is stopped, the atomizing characteristics of the liquid fuel 101 is not lowered. Since steam 103 and steam 106 are used for atomization of liquid fuel grains, a mixing state of steam in a region where fuel reaction on the fuel nozzle side in a liner is active is improved and production of NOX is reduced by means of a less amount of steam.

47. 发明专利

JPH0484010A FUEL NOZZLE 失效
公开(公告)号：JPH0484010A
公开(公告)日：1992-03-17
申请号：JP19793690
申请日：1990-07-27
申请人： HITACHI LTD
发明人： IWAI KAZUMI , KOIZUMI HIROMI , KOBAYASHI SHIGEYOSHI , URUSHIYA HARUO , IIZUKA NOBUYUKI , MORITOMO YOSHIKAZU
IPC分类号： F23D14/48 , F23D17/00 , F23R3/28
摘要： PURPOSE:To stabilize the flame and cool effectively the fuel nozzle by providing an air jet opening very close to a high calorie fuel jet opening. CONSTITUTION:Near a high calorie fuel jet opening 36, an air opening 60 is provided which leads a part of the air to be supplied to air rotating vanes 45 and the air supplied to the air opening 60 is introduced from an air intake port 61 at the outer circumference of a nozzle, and it crosses the inside of the nozzle and is jetted out from the front face of the nozzle with air rotation. This crossing flow channel cools the nozzle body. An oil fuel jet opening 36 is located at the center and fuel atomization air jet openings 40 are provided on its circumference. A main jet opening 44 of the coal gas which directly influences the flame stability is a little off the center at the position required for the flame stabilization. Air jet openings 60 for stabilizing the combustion of high calorie fuel 30, 40 are provided near the jet opening of the high calorie fuel. Air jet openings that contribute to the stabilization of the combustion of low calorie fuel 43, 44 are arranged on the outer circumference of the jet opening.

48. 发明专利

JPH0339821A BURNER 失效
公开(公告)号：JPH0339821A
公开(公告)日：1991-02-20
申请号：JP17275289
申请日：1989-07-04
申请人： HITACHI LTD , CENTRAL RES INST ELECT
发明人： MACHIDA TAKASHI , MIYATA HIROSHI , NAKAKADO MASAAKI , IWAI KAZUMI , ABE TOSHIO , HISAMATSU NOBORU
IPC分类号： F23R3/42 , F23D14/22
摘要： PURPOSE:To efficiently utilize the heat resistance of ceramics and suppress an increase in manufacturing man-hour, cost and weight by arranging ceramic layers in the given partial regions of the inner surface of an internal cylinder. CONSTITUTION:A burner is composed of an internal cylinder 1 and a tail cylinder 2 connected to the internal cylinder 1 in the direction of the length of the cylinder 1 or composed of at least the internal cylinder 1. At least one combustion air hole 3 is formed in the circumferential wall of the internal cylinder 1 and ceramic layers 6 are arranged on the inner surface of the internal cylinder 1. The ceramic layers 6 are arranged in at least given partial regions of the inner surface of the internal cylinder 1 whose temperatures are raised. For example, the ceramic layers are arranged only in the neighborhood of the combustion air hole 3 formed in the inner surface of the internal cylinder 1. The neighborhood of the ceramic layers 6 are the regions wherein the most violent combustion reaction is conducted and the maximum temperature 1500-2000 deg.C is locally generated. By arranging the ceramic layers 6 only in these regions, the cooling air can be reduced and an increase in manufacturing man-hour and weight can be suppressed.

49. 发明专利

JPS6454123A CERAMIC BURNER 失效
公开(公告)号：JPS6454123A
公开(公告)日：1989-03-01
申请号：JP21006587
申请日：1987-08-26
申请人： HITACHI LTD
发明人： IWAI KAZUMI , ARAI TORU , ISHIBASHI YOJI , KOIZUMI HIROMI , WADA KATSUO
IPC分类号： F23R3/06 , F23R3/42
摘要： PURPOSE:To lighten the weight of the burner as a whole and simplify the manufacture thereof by setting the thickness of structural material ceramics to a thickness which is required for heat shielding, and loosely connecting the ceramics to metal cylinders surrounding the same, in the ceramic burner for use in a gas turbine. CONSTITUTION:Holes for passing cooling air or combustion air are formed in the metal outer cylinder 2 of the laminated ceramic burner. Fiber ceramics 3 and porous ceramics 4 are inserted between the metal outer cylinder 2 and structural material ceramics 5 thereby to prevent the metal 2 from directly contacting the structural ceramics 5. The structural ceramics 5 are laminated with spaces in such a degree that cooling air 1 can flow therethrough. The porous ceramics 4 are formed to wrap the structural ceramics so that they do not contact high-temperature combustion gas 7.

50. 发明专利

JPS63101622A CATALYSTIC BURNER 失效
公开(公告)号：JPS63101622A
公开(公告)日：1988-05-06
申请号：JP24742986
申请日：1986-10-20
申请人： HITACHI LTD
发明人： KOIZUMI HIROMI , IWAI KAZUMI , YOKOTA OSAMU , WADA KATSUO
IPC分类号： F23R3/40
摘要： PURPOSE:To provide a catalystic burner which is capable of burning completely an unburned fuel portion by providing a throttle at part of a flow passage of the high temperature gas which is generated from a pilot flame that is formed in the rear stage catalyst and mixing well an unburned portion which is generated at the front stage catalyst and the high temperature gas obtained from the pilot flame which is formed at the rear stage catalyst. CONSTITUTION:The concentration of a premixed gas upstream of a front stage catalyst 1 is always changing, and the catalyst is not always used at its optimum temperature. Accordingly, the combustion of the front stage catalyst 1 is not necessarily a complete combustion. But the temperature of the gas at the outlet of a rear stage catalyst 2 is always at optimum temperature for the catalyst and since a temperature over 1,000 deg.C can be obtained, a pilot flame 15 is formed behind the catalyst. Furthermore, by throttling at a throttle section 16 a burner liner 3 in order to promote the mixing of a high temperature gas which can be obtained from the pilot flame 15 at a short distance from it and an unburned portion other than the high temperature gas which is formed by the catalystic reaction the unburned portion generated by the catalystic reaction is mixed well with the pilot flame 15 after passing through the rear stage catalyst 2 and achieves complete combustion.

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