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1. 发明专利

JPH1047638A EXHAUST GAS TREATING METHOD AND APPARATUS AND GARBAGE INCINERATION POWER GENERATION PLANT 失效
公开(公告)号：JPH1047638A
公开(公告)日：1998-02-20
申请号：JP20603696
申请日：1996-08-05
申请人： HITACHI LTD , HITACHI ENG CO LTD , HITACHI ENG SERVICE
发明人： KOIKE NORIO , KOYAMA KAZUHITO , IWAI KAZUMI , SUNOU MEGUMI
IPC分类号： F01K27/02 , B01D53/34 , B01D53/70 , F01K3/24 , F23G5/16 , F23G7/06 , F23J15/00
摘要： PROBLEM TO BE SOLVED: To enable the utilization of waste heat by inhibiting the generation of dioxin. SOLUTION: After an exhaust gas from an incinerator 1 passes through a dust remover 3 such as a widely known bag filter, the exhaust gases are consolidated into one and all of the exhaust gases are thermally decomposed by an modified type combustor 4 to generate a clean exhaust gas cleared of dioxin. After passed through a superheater 5, a high temperature gas is expanded by an expansion turbine 6 to generate power and still, the remaining heat undergoes a heat exchange with a waste heat recovery device 8. Then, the gas is discharged from a stack 11 at a temperature so set as to spill no fume. On the other hand, steam generated from a boiler 2 attached to the incinerator exchanges heat with the superheater via a steam reservoir 15 and then, is guided to a steam turbine 9 to drive a generator 10. The steam 106 partially extracted enters a modifying device of a modified type combustor 4 to help generate a reducing gas. The steam leaving the steam turbine 9 undergoes a heat exchange in a condenser 12 and a part thereof is forwarded to the waste heat recovery device 8. In addition, the steam leaving the steam turbine 9 is circulated to the boiler 2 via a feed water system.

2. 发明专利

JP2002213719A COMBUSTOR FOR EXHAUST GAS PURIFYING DEVICE 失效
公开(公告)号：JP2002213719A
公开(公告)日：2002-07-31
申请号：JP2001009657
申请日：2001-01-18
申请人： HITACHI LTD , HITACHI ENG SERVICE
发明人： ISHIZAWA SHUICHI , USAMI SABURO , OKUBO DAISUKE , IWAI KAZUMI
IPC分类号： F23G7/06
摘要： PROBLEM TO BE SOLVED: To relax concentration of a stress to the shade part and the throttle part of a liner. SOLUTION: Thermal shrinkage of the shade part and the throttle part is absorbed and a stress is not concentrated to a combustion liner and the shade part and the mounting part of the throttle part.

3. 发明专利

JP2001153329A EXHUST GAS PURIFICATION PLANT FOR REFUSE BURNING AND ITS OPERATION METHOD 失效
公开(公告)号：JP2001153329A
公开(公告)日：2001-06-08
申请号：JP33315999
申请日：1999-11-24
申请人： HITACHI LTD , HITACHI ENG SERVICE
发明人： OKUBO DAISUKE , TANI MICHINARI , IWAI KAZUMI
IPC分类号： F01K27/02 , F23G5/16 , F23G5/46 , F23G5/50
摘要： PROBLEM TO BE SOLVED: To obtain an exhaust gas purification plant for refuse incineration by which an exhaust gas purification treatment can be conducted while maintaining a stable burning condition without flame-off of the combustor even when the oxygen concentration of the exhaust gas is lowered suddenly due to a soot blower. SOLUTION: When the oxygen concentration of incineration exhaust gas 32 lead into the combustor 1 is suddenly lowered, the operation mode is switched over, information of an oxygen concentration meter 17 of the combustion gas, a thermometer 16 of the combustion gas are fed back to a control device 50 to control the flow rate of flame stabilizing air 31 by regulating the flow-rate control value 11.

4. 发明专利

JPH11248120A EXHAUST GAS PURIFICATION SYSTEM FOR WASTE INCINERATOR 失效
公开(公告)号：JPH11248120A
公开(公告)日：1999-09-14
申请号：JP4567498
申请日：1998-02-26
申请人： HITACHI LTD , HITACHI ENG SERVICE
发明人： NOMOTO SATORU , KOYAMA KAZUHITO , OKUZAWA TSUTOMU , ISHIMARU HITOSHI , TAKAHAMA YOJI , SUNOU MEGUMI , IWAI KAZUMI
IPC分类号： F23G5/14 , F23G7/06
摘要： PROBLEM TO BE SOLVED: To provide an exhaust gas mixing system for waste incinerator in which dioxins and nitrogen oxides are reduced by suppressing and averaging time variation in the exhaust gas components of the incinerator thereby operating an exhaust gas recombustor stably. SOLUTION: In a system for purifying exhaust gas from a waste incineration facility by recombusting the exhaust gas through an exhaust gas recombustor, an exhaust gas duct 22 from the waste incineration facility is provided with a branch section 30 on the downstream side and a combining section 31 on the upstream side. The branch section and the combining section are coupled in loop through a branch pipe 33 into which the exhaust gas is shunted.

5. 发明专利

JP2000213726A METHOD AND DEVICE FOR DIOXIN REDUCTION 失效
公开(公告)号：JP2000213726A
公开(公告)日：2000-08-02
申请号：JP1204199
申请日：1999-01-20
申请人： HITACHI LTD , HITACHI ENG SERVICE
发明人： IWAI KAZUMI , KAWASAKI TERUFUMI , ISHIMARU HITOSHI
IPC分类号： B01D53/34 , B01D53/70 , F23G7/06 , F23J15/08
摘要： PROBLEM TO BE SOLVED: To efficiently burn and decompose a dioxin reduction obstructing substance, and reduce the discharge of dioxin by promoting the decomposition of dioxin, by thermally keeping the whole body in a combustion cylinder within a specified temperature range extending to a specified zone, by the heat energy owned by an incineration gas. SOLUTION: This dioxin reducing device 4 is constituted of a combustion cylinder 5 comprising an internal cylinder 6 and an external cylinder 7, a combustion device 11 which is provided on the upper end section of the internal cylinder 6, and a heat- keeping body 21 which is provided at the lower end of the internal cylinder 6. A flame 15 is formed by a produced gas 3 comprising a fuel and combustion air, and the combustion is continued. The temperature of the flame coming out from a nozzle 12 becomes one thousand and several hundreds degree, but an introduction hole for the produced gas 3 is provided on the internal cylinder 6, and the produced gas 3 flows in as secondary air, and the temperature of a combustion gas 19 at the lower section of the internal cylinder 6 becomes 850-950 deg.C. A gas residing time in the internal cylinder 6 until the produced gas is introduced to the heat-keeping body 21 is short, but the gas temperature high, and the reduction of dioxin occurs in this period as well.

6. 发明专利

JP2000171022A METHOD AND DEVICE FOR PURIFYING WASTE GAS OF WASTE INCINERATION 失效
公开(公告)号：JP2000171022A
公开(公告)日：2000-06-23
申请号：JP34448598
申请日：1998-12-03
申请人： HITACHI LTD , HITACHI ENG SERVICE
发明人： NOMOTO SATORU , KOYAMA KAZUHITO , OKUZAWA TSUTOMU , KAWASAKI TERUFUMI , ISHIMARU HITOSHI , TANI MICHINARI , IWAI KAZUMI
IPC分类号： B01D53/70 , F23G7/06 , F23J15/06 , F23J15/08
摘要： PROBLEM TO BE SOLVED: To decompose and reduce more effectively poisonous substances contained in the waste gas of waste incineration. SOLUTION: A part of the waste gas of waste incineration is sent into a combustion device 9 together with fresh air 15 whereby the instantaneous reduction of oxygen concentration can be restrained even when the constituents of waste gas of waste incineration, which is discharged out of a waste incinerating facility, is fluctuated and combustion through the combustion device 9 can be effected stably whereby the stability of combustion can accordingly be secured regardless of the fluctuation of constituents of the waste gas of waste incineration. Further, the other part of waste gas of the waste incineration, which is branched by a second branch pipe 8B, is sent into a mixing device 18 to mix high-temperature exhaust gas of the combustion device 9 and the waste gas of waste incineration in the mixing device 18 whereby the temperature of waste gas can be unified under the condition of a high temperature and, accordingly, poisonous substances, such as dioxins especially, can be decomposed and reduced efficiently while the faulty decomposition of the poisonous substances due to the lowering of temperature can be avoided.

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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