JPH1130422A - Low nox combustor for two-fluid cycle - Google Patents

Low nox combustor for two-fluid cycle

Info

Publication number
JPH1130422A
JPH1130422A JP9183584A JP18358497A JPH1130422A JP H1130422 A JPH1130422 A JP H1130422A JP 9183584 A JP9183584 A JP 9183584A JP 18358497 A JP18358497 A JP 18358497A JP H1130422 A JPH1130422 A JP H1130422A
Authority
JP
Japan
Prior art keywords
combustion
steam
injection valve
combustor
fuel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9183584A
Other languages
Japanese (ja)
Inventor
Yasuhiro Ishikawa
康弘 石川
Jun Hosoi
潤 細井
Hidemi Fuji
秀実 藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHI Corp
Original Assignee
IHI Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by IHI Corp filed Critical IHI Corp
Priority to JP9183584A priority Critical patent/JPH1130422A/en
Publication of JPH1130422A publication Critical patent/JPH1130422A/en
Pending legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/14—Combined heat and power generation [CHP]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
    • Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply

Landscapes

  • Air Supply (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a low NOx combustor for a two-fluid cycle to increase a large amount of steam against a combustor when a power demand is high, completely eliminate injection of steam as the generation of NOx is suppressed when a power demand is low and a demand for stem is high, and increase utility steam and reduce an amount of consuming fuel through this constitution. SOLUTION: This combustor comprises a hollow cylindrical combustor can having one end being opened, a pilot combustor 14 arranged at the central part of the other end such that flame is injected in the combustion can, and a plurality of hybrid injection valves 15 arranged around a pilot combustor. A hybrid injection valve 15 is formed such that a lean premixture combustion injection valve 16 and a steam injection diffusion fuel injection valve 18 are combined together, and the steam injection diffusion combustion valve 18 is incorporated in the hollow cylindrical premixture chamber 16a of the lean premixture fuel injection valve.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、二流体サイクル用
の低ＮＯｘ燃焼器に関する。TECHNICAL FIELD The present invention relates to a low NOx combustor for a two-fluid cycle.

【０００２】[0002]

【従来の技術】近年、ガスタービンと蒸気タービンを組
み合わせて発電効率の向上を図るコージェネレーション
システムが脚光を浴びている。図４は、特公平８−２６
７８０号公報に開示された二流体サイクルの構成図であ
り、ガスタービン設備１の排熱Ｅで発生した水蒸気２を
混合器３で圧縮空気４と混合し、この混合ガスを排熱Ｅ
で加熱してガスタービンの燃焼器５に噴射することによ
り、余剰水蒸気２ａをユーティリィティとして供給しな
がら、電力需要に応じて発電出力が増大できるようにな
っている。なおこの図で６は排熱回収ボイラ、Ａは空
気、Ｆは燃料、Ｗは給水である。2. Description of the Related Art In recent years, a cogeneration system for improving power generation efficiency by combining a gas turbine and a steam turbine has been spotlighted. Figure 4 shows the Japanese Patent Publication No. 8-26.
1 is a configuration diagram of a two-fluid cycle disclosed in Japanese Patent Application Publication No. 780, in which steam 2 generated by exhaust heat E of a gas turbine facility 1 is mixed with compressed air 4 by a mixer 3, and the mixed gas is exhausted by heat exhaust E
By heating the fuel and injecting it into the combustor 5 of the gas turbine, the power generation output can be increased according to the power demand while supplying the surplus steam 2a as a utility. In this figure, 6 is an exhaust heat recovery boiler, A is air, F is fuel, and W is water supply.

【０００３】一方、環境保護のために、ガスタービンの
燃焼排ガス中のＮＯｘ（窒素酸化物）を低減することが
義務付けられており、我国では、全国基準でも例えば７
０ｐｐｍ以下、大都市（例えば東京）では例えば２５〜
３０ｐｐｍ以下にする必要がある。ＮＯｘの発生要因
は、燃焼時の高温火炎により空気中の窒素が酸化する、
いわゆるサーマルＮＯｘが主であり、このサーマルＮＯ
ｘを低減するには、火炎中のホットスポットを減少さ
せ、高温火炎の発生をなくすことが効果的である。この
ため、上述した二流体サイクルでは、水蒸気の噴射によ
り火炎温度を低下させる手段が用いられ、燃焼器には水
蒸気を噴射しても安定燃焼ができる拡散燃焼器が使用さ
れていた。On the other hand, to protect the environment, it is required to reduce NOx (nitrogen oxides) in the combustion exhaust gas of a gas turbine.
0 ppm or less, for example, 25-
It is necessary to make it 30 ppm or less. The cause of NOx is that the nitrogen in the air is oxidized by the high-temperature flame during combustion.
So-called thermal NOx is mainly used.
To reduce x, it is effective to reduce the number of hot spots in the flame and eliminate the occurrence of high-temperature flame. For this reason, in the two-fluid cycle described above, means for lowering the flame temperature by injecting steam is used, and a diffusion combustor capable of performing stable combustion even when injecting steam is used in the combustor.

【０００４】[0004]

【発明が解決しようとする課題】上述した二流体サイク
ルでは、電力需要が大きいときには大量の水蒸気を燃焼
器に噴射してガスタービンの出力を増大させ、電力需要
が小さく水蒸気の需要が大きいときには、逆に蒸気噴射
を最小限に絞って燃料消費を抑制するようになってい
る。しかし、上述した従来の燃焼器（蒸気噴射拡散燃焼
器）では、水蒸気を減らしすぎるとＮＯｘ発生量が増大
して規制値を超えるおそれがあり、常に蒸気噴射が必要
となり、その分ユーティリィティ蒸気量が減り、かつ燃
料消費量が多くなる問題点があった。In the two-fluid cycle described above, when the power demand is large, a large amount of steam is injected into the combustor to increase the output of the gas turbine, and when the power demand is small and the steam demand is large, Conversely, fuel consumption is suppressed by minimizing steam injection. However, in the above-described conventional combustor (steam injection diffusion combustor), if the steam is reduced too much, the NOx generation amount may increase and exceed the regulation value, so that steam injection is always required, and the utility steam amount is correspondingly increased. However, there is a problem that fuel consumption is increased and fuel consumption is increased.

【０００５】一方、低ＮＯｘ化が可能な燃焼器として、
上述した蒸気噴射拡散燃焼器の他に希薄予混合燃焼器が
知られている。この希薄予混合燃焼器は、燃料を十分な
空気量と予混合して均質化し、これを希薄燃焼させるも
のであり、大量の空気と共に燃焼させるため、ホットス
ポットがなく、高温火炎の発生をなくし低ＮＯｘ化を実
現することができる。しかし、この希薄予混合燃焼器
は、蒸気を必要としない反面、燃焼が不安定になりやす
い問題点がある。このため、希薄予混合燃焼器に水蒸気
を噴射すると火炎温度が下がり過ぎ、ほとんど安定燃焼
ができず失火してしまう問題点があった。On the other hand, as a combustor capable of reducing NOx,
In addition to the steam injection diffusion combustor described above, a lean premix combustor is known. This lean premixed combustor premixes fuel with a sufficient amount of air to homogenize it and burns it lean.Therefore, since it is burned with a large amount of air, it has no hot spots and eliminates the generation of high-temperature flames. Low NOx can be realized. However, although this lean premixed combustor does not require steam, it has a problem that combustion tends to be unstable. Therefore, when steam is injected into the lean premixed combustor, the flame temperature becomes too low, and there is a problem that almost stable combustion cannot be performed and a misfire occurs.

【０００６】本発明は、かかる問題点を解決するために
創案されたものである。すなわち本発明の目的は、電力
需要が大きいときには大量の水蒸気を燃焼器に噴射して
ガスタービンの出力を増大させることができ、かつ電力
需要が小さく水蒸気の需要が大きいときに、ＮＯｘの発
生を抑制しながら、水蒸気噴射を完全になくし、これに
よりユーティリィティ蒸気の増加と燃料消費量の低減を
図ることができる二流体サイクル用の低ＮＯｘ燃焼器を
提供することにある。The present invention has been made to solve such a problem. That is, an object of the present invention is to increase the output of a gas turbine by injecting a large amount of steam into a combustor when power demand is large, and to reduce NOx generation when power demand is small and steam demand is large. It is an object of the present invention to provide a low-NOx combustor for a two-fluid cycle, in which steam injection is completely eliminated while suppressing the fuel consumption, thereby increasing utility steam and reducing fuel consumption.

【０００７】[0007]

【課題を解決するための手段】本発明は上述した蒸気噴
射拡散燃焼器と希薄予混合燃焼器を組み合わせて、電力
需要が大きいときでも、逆に電力需要が小さく水蒸気の
需要が大きいときでも、最も効率的に機能するようにし
たものである。SUMMARY OF THE INVENTION The present invention combines the above-described steam injection diffusion combustor with a lean premixed combustor to be used even when power demand is large or conversely when power demand is small and steam demand is large. It is designed to work most efficiently.

【０００８】すなわち、本発明によれば、一端が開口し
た中空円筒形の燃焼缶と、該燃焼缶内に火炎を噴射する
ように他端中央部に配置されたパイロット燃焼器と、該
パイロット燃焼器のまわりに配置された複数のハイブリ
ッド噴射弁とを備え、前記パイロット燃焼器は蒸気を用
いない拡散燃焼管であり、前記ハイブリッド噴射弁は、
燃料と空気を予混合して希薄燃焼させる希薄予混合燃焼
噴射弁と燃料を拡散燃焼させこれに蒸気を混入する蒸気
噴射拡散燃焼噴射弁とが組み合わされている、ことを特
徴とする二流体サイクル用の低ＮＯｘ燃焼器が提供され
る。That is, according to the present invention, a hollow cylindrical combustion can with one end opened, a pilot combustor arranged at the center of the other end to inject a flame into the combustion can, and the pilot combustion A plurality of hybrid injection valves disposed around a vessel, wherein the pilot combustor is a steam-free diffusion combustion tube, and the hybrid injection valve includes:
A two-fluid cycle, wherein a lean premixed combustion injection valve for premixing fuel and air to perform lean combustion and a steam injection diffusion combustion injection valve for diffusing and burning fuel and mixing steam with the fuel are combined. A low NOx combustor is provided.

【０００９】上記本発明の構成によれば、噴射弁が、希
薄予混合燃焼噴射弁と蒸気噴射拡散燃焼噴射弁を組み合
わせたハイブリッド噴射弁であるので、電力需要が大き
いときには、蒸気噴射拡散燃焼噴射弁で燃焼することに
より、水蒸気の噴射により大量の水蒸気を燃焼器に噴射
してガスタービンの出力を増大させることができると共
に、拡散燃焼時の火炎温度を低下させ低ＮＯｘ化を達成
することができ、電力需要が小さく水蒸気の需要が大き
いときには、希薄予混合燃焼噴射弁で燃焼することによ
り、水蒸気の供給なしに、燃料と空気を予混合して希薄
燃焼させて低ＮＯｘ化を達成することができる。また、
この燃焼時にパイロット燃焼器（拡散燃焼管）も燃焼さ
せることにより、低ＮＯｘ化を阻害することなく燃焼の
安定化を実現できる。According to the configuration of the present invention, since the injection valve is a hybrid injection valve combining the lean premixed combustion injection valve and the steam injection diffusion combustion injection valve, when the power demand is large, the steam injection diffusion combustion injection By burning with a valve, it is possible to increase the output of the gas turbine by injecting a large amount of steam into the combustor by injecting steam, and to reduce the flame temperature during diffusion combustion to achieve low NOx. When the power demand is small and the demand for steam is high, the fuel and air are premixed and burned lean without fuel vapor to achieve low NOx by burning with a lean premixed combustion injection valve. Can be. Also,
By burning the pilot combustor (diffusion combustion tube) during this combustion, the combustion can be stabilized without impairing the reduction of NOx.

【００１０】本発明の好ましい実施形態によれば、前記
ハイブリッド噴射弁は、中空円筒形の予混合室を有する
希薄予混合燃焼噴射弁と、該予混合室内に内蔵された蒸
気噴射拡散燃焼噴射弁からなる。この構成により、希薄
予混合燃焼噴射弁のみの使用時には、予混合室で燃料と
空気を十分に混合して希薄燃焼させることができ、蒸気
噴射拡散燃焼噴射弁を単独又は併用して使用する場合に
も、予混合室の機能を損なうことなく、拡散燃焼時の火
炎温度を低下させ低ＮＯｘ化を達成することができる。According to a preferred embodiment of the present invention, the hybrid injection valve includes a lean premixed combustion injection valve having a hollow cylindrical premixing chamber, and a steam injection diffusion combustion injection valve incorporated in the premixing chamber. Consists of With this configuration, when only the lean premixed combustion injection valve is used, the fuel and air can be sufficiently mixed in the premixing chamber to perform lean combustion, and when the steam injection diffusion combustion injection valve is used alone or in combination. In addition, the flame temperature during diffusion combustion can be reduced and the NOx reduction can be achieved without impairing the function of the premixing chamber.

【００１１】また、更に、燃料と水蒸気をハイブリッド
噴射弁に供給する切換器を備え、該切換器により、電力
需要が小さく水蒸気の需要が大きいときには、燃料のみ
を希薄予混合燃焼噴射弁のみに供給する。この構成によ
り、電力需要が小さく水蒸気の需要が大きいときに、水
蒸気を燃焼器で消費することなく、希薄燃焼により低Ｎ
Ｏｘ化を達成することができ、電力需要が大きいときに
は、これと併用して、或いはこれを切り換えて蒸気噴射
拡散燃焼噴射弁に水蒸気を燃焼器に噴射してガスタービ
ン出力の増大と、火炎温度の低下による低ＮＯｘ化を達
成することができる。Further, a switch is provided for supplying fuel and steam to the hybrid injection valve. When the power demand is small and the steam demand is large, the switch supplies only fuel to the lean premixed combustion injection valve only. I do. With this configuration, when the power demand is small and the steam demand is large, the low N
Oxification can be achieved, and when the power demand is large, the steam is injected into the combustor by using the steam injection diffusion combustion injection valve together with or when the power demand is increased, thereby increasing the gas turbine output and the flame temperature. NOx can be reduced due to the decrease in NOx.

【００１２】[0012]

【発明の実施の形態】以下に本発明の好ましい実施態様
を図面を参照して説明する。なお、各図において、共通
する部分には同一の符号を付し重複した説明を省略す
る。図１は、本発明による二流体サイクル用の低ＮＯｘ
燃焼器の正面図であり、図２は、図１のＡ−Ａ線におけ
る断面図である。これらの図に示すように、本発明の低
ＮＯｘ燃焼器１０は、中空円筒形の燃焼缶１２、パイロ
ット燃焼器１４、ハイブリッド噴射弁１５及び切換器２
０からなる。Preferred embodiments of the present invention will be described below with reference to the drawings. In each of the drawings, common portions are denoted by the same reference numerals, and redundant description will be omitted. FIG. 1 shows a low NOx for a two-fluid cycle according to the present invention.
FIG. 2 is a front view of the combustor, and FIG. 2 is a cross-sectional view taken along line AA of FIG. As shown in these figures, a low NOx combustor 10 of the present invention comprises a hollow cylindrical combustion can 12, a pilot combustor 14, a hybrid injection valve 15, and a switching device 2.
Consists of zero.

【００１３】燃焼缶１２は、一端（図２で下端）が開口
した中空円筒形をしており、その内部に燃焼室１２ａが
形成される。燃焼缶１２は、燃焼器本体１３の内部に内
壁から間隔を隔てて設置されており、図に矢印で示すよ
うに燃焼缶１２のまわりを空気Ａが流れ、パイロット燃
焼器１４、ハイブリッド噴射弁１５を通って燃焼缶１２
の内部に流入して燃焼に寄与し、この燃焼により発生し
た高温ガスが、燃焼室１２ａに連通した内管１３ａを通
って、図示しないガスタービンに供給される。The combustion can 12 has a hollow cylindrical shape whose one end (the lower end in FIG. 2) is open, and a combustion chamber 12a is formed therein. The combustion can 12 is installed inside the combustor main body 13 at a distance from the inner wall, and air A flows around the combustion can 12 as shown by an arrow in the figure, and a pilot combustor 14 and a hybrid injection valve 15 are provided. Burning can 12 through
Flows into the inside of the combustion chamber and contributes to combustion, and the high-temperature gas generated by this combustion is supplied to a gas turbine (not shown) through an inner pipe 13a communicating with the combustion chamber 12a.

【００１４】図１に示すように、単一のパイロット燃焼
器１４が、燃焼缶１２の他端（図２で上端）の中央部に
配置され、燃焼缶１２の内部（すなわち燃焼室１２ａ）
に火炎を噴射するようになっている。このパイロット燃
焼器１４は蒸気を用いない拡散燃焼管であり、常時燃焼
してハイブリッド噴射弁１５の燃焼を安定化するように
なっている。すなわち、パイロット燃焼器１４はハイブ
リッド噴射弁１５からの燃料−空気混合気及び／又は燃
料−空気−蒸気混合気に火炎と熱を与え燃焼を安定させ
る役割を果たしている。As shown in FIG. 1, a single pilot combustor 14 is disposed at the center of the other end (the upper end in FIG. 2) of the combustion can 12, and is provided inside the combustion can 12 (ie, the combustion chamber 12a).
The flame is to be sprayed. The pilot combustor 14 is a diffusion combustion tube that does not use steam, and is constantly burned to stabilize combustion of the hybrid injection valve 15. That is, the pilot combustor 14 plays a role of providing flame and heat to the fuel-air mixture and / or the fuel-air-steam mixture from the hybrid injection valve 15 to stabilize combustion.

【００１５】図３はハイブリッド燃焼弁１５の構成を示
す図２の部分拡大図である。この図に示すように、ハイ
ブリッド噴射弁１５は、燃料Ｆと空気Ａを予混合して希
薄燃焼させる希薄予混合燃焼噴射弁１６と燃料Ｆを拡散
燃焼させこれに蒸気Ｓを混入する蒸気噴射拡散燃焼噴射
弁１８とが組み合わされている。すなわち、ハイブリッ
ド噴射弁１５は、中空円筒形の予混合室１６ａを有する
希薄予混合燃焼噴射弁１６と、予混合室１６内に内蔵さ
れた蒸気噴射拡散燃焼噴射弁１８からなる。希薄予混合
燃焼噴射弁１６には、燃料管１６ｂから燃料Ｆが供給さ
れ、予混合室１６ａ内で空気と予混合されて蒸発し、予
混合室１６ａの下端から燃焼室１２ａに供給され、パイ
ロット燃焼器１４の火炎により安定に燃焼する。また、
蒸気噴射拡散燃焼噴射弁１８には、燃料管１８ａから燃
料Ｆ、蒸気管１８ｂから水蒸気Ｓがそれぞれ供給され、
予混合室１６ａ内の空気又は予混合燃料と混合し、燃料
が拡散しながら燃焼室１２ａに供給され、パイロット燃
焼器１４の火炎により安定に燃焼する。FIG. 3 is a partially enlarged view of FIG. 2 showing the configuration of the hybrid combustion valve 15. As shown in this figure, a hybrid injection valve 15 is a lean premixed combustion injection valve 16 for premixing fuel F and air A to perform lean combustion, and a vapor injection diffusion for diffusing and burning fuel F and mixing steam S therein. The fuel injection valve 18 is combined. That is, the hybrid injection valve 15 includes a lean premixed combustion injection valve 16 having a hollow cylindrical premixing chamber 16a, and a steam injection diffusion combustion injection valve 18 built in the premixing chamber 16. The fuel F is supplied from the fuel pipe 16b to the lean premixed combustion injection valve 16, is premixed with air in the premixing chamber 16a, evaporates, and is supplied from the lower end of the premixing chamber 16a to the combustion chamber 12a. The flame of the combustor 14 stably burns. Also,
The fuel F and the steam S are supplied to the steam injection diffusion combustion injection valve 18 from the fuel pipe 18a and the steam pipe 18b, respectively.
The fuel is mixed with the air or the premixed fuel in the premixing chamber 16a, supplied to the combustion chamber 12a while the fuel is diffused, and is stably burned by the flame of the pilot combustor 14.

【００１６】従って、この構成により、希薄予混合燃焼
噴射弁１６のみの使用時には、予混合室１６ａで燃料Ｆ
と空気Ａを十分に混合して希薄燃焼させることができ、
蒸気噴射拡散燃焼噴射弁１８を単独又は併用して使用す
る場合にも、予混合室１６ａの機能を損なうことなく、
拡散燃焼時の火炎温度を低下させ低ＮＯｘ化を達成する
ことができる。Therefore, according to this configuration, when only the lean premixed combustion injection valve 16 is used, the fuel F is stored in the premixing chamber 16a.
And air A can be mixed sufficiently to cause lean combustion,
Even when using the steam injection diffusion combustion injection valve 18 alone or in combination, without impairing the function of the premixing chamber 16a,
The flame temperature at the time of diffusion combustion can be reduced to achieve low NOx.

【００１７】本発明の二流体サイクル用の低ＮＯｘ燃焼
器１０は、更に燃料Ｆと水蒸気Ｓをハイブリッド噴射弁
１５に供給する切換器２０を備えている。この切換器２
０は、電力需要が小さく水蒸気の需要が大きいときに
は、燃料Ｆのみを希薄予混合燃焼噴射弁１６のみに供給
し、電力需要が大きい場合には、これと併用して、或い
はこれを切り換えて、蒸気噴射拡散燃焼噴射弁１８に水
蒸気Ｓと燃料Ｆを供給するようになっている。The low NOx combustor 10 for a two-fluid cycle according to the present invention further includes a switch 20 for supplying the fuel F and the steam S to the hybrid injection valve 15. This switch 2
0 indicates that when the power demand is small and the demand for steam is large, only the fuel F is supplied to the lean premixed combustion injection valve 16 only, and when the power demand is large, the fuel F is used together with or switched over. The steam S and the fuel F are supplied to the steam injection diffusion combustion injection valve 18.

【００１８】この構成により、電力需要が小さく水蒸気
の需要が大きいときに、水蒸気Ｓを燃焼器で消費するこ
となく、希薄燃焼により低ＮＯｘ化を達成することがで
き、電力需要が大きいときには、水蒸気Ｓの噴射により
ガスタービン出力の増大と、火炎温度の低下による低Ｎ
Ｏｘ化を同時に達成することができる。With this configuration, when the power demand is small and the demand for steam is large, it is possible to achieve low NOx by lean combustion without consuming steam S in the combustor. Injection of S increases gas turbine output, and lowers N due to lower flame temperature.
Oxification can be achieved simultaneously.

【００１９】上述した本発明の構成によれば、噴射弁
が、希薄予混合燃焼噴射弁１６と蒸気噴射拡散燃焼噴射
弁１８を組み合わせたハイブリッド噴射弁１５であるの
で、電力需要が大きいときには、蒸気噴射拡散燃焼噴射
弁１８を単独又は併用して燃焼することにより、水蒸気
の噴射により大量の水蒸気を燃焼器に噴射してガスター
ビンの出力を増大させることができると共に、拡散燃焼
時の火炎温度を低下させ低ＮＯｘ化を達成することがで
きる。また、電力需要が小さく水蒸気の需要が大きいと
きには、希薄予混合燃焼噴射弁１６のみで燃焼すること
により、水蒸気の供給なしに、燃料と空気を予混合して
希薄燃焼させて低ＮＯｘ化を達成することができる。ま
た、この燃焼時にパイロット燃焼器（拡散燃焼管）も燃
焼させることにより、低ＮＯｘ化を阻害することなく燃
焼の安定化を実現できる。According to the configuration of the present invention described above, the injection valve is the hybrid injection valve 15 in which the lean premixed combustion injection valve 16 and the steam injection diffusion combustion injection valve 18 are combined. By burning the injection diffusion combustion injection valve 18 alone or in combination, a large amount of steam can be injected into the combustor by the injection of steam to increase the output of the gas turbine, and the flame temperature during diffusion combustion can be reduced. It is possible to achieve lower NOx by lowering NOx. When the demand for electric power is small and the demand for steam is large, combustion is performed only with the lean premixed combustion injection valve 16 so that fuel and air are premixed and lean combustion is performed without supply of steam to achieve low NOx. can do. Further, by burning the pilot combustor (diffusion combustion tube) at the time of this combustion, the combustion can be stabilized without inhibiting the reduction of NOx.

【００２０】なお、本発明は上述した実施形態に限定さ
れず、本発明の要旨を逸脱しない範囲で種々変更できる
ことは勿論である。It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that various changes can be made without departing from the spirit of the present invention.

【００２１】[0021]

【発明の効果】上述したように、本発明の二流体サイク
ル用の低ＮＯｘ燃焼器は、電力需要が大きいときには大
量の水蒸気を燃焼器に噴射してガスタービンの出力を増
大させることができ、かつ電力需要が小さく水蒸気の需
要が大きいときに、ＮＯｘの発生を抑制しながら、水蒸
気噴射を完全になくし、これによりユーティリィティ蒸
気の増加と燃料消費量の低減を図ることができる、等の
優れた効果を有する。As described above, the low NOx combustor for a two-fluid cycle of the present invention can increase the output of a gas turbine by injecting a large amount of steam into the combustor when the power demand is large, In addition, when the power demand is small and the demand for steam is large, it is possible to completely eliminate the steam injection while suppressing the generation of NOx, thereby increasing the utility steam and reducing the fuel consumption. Has the effect.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明による低ＮＯｘ燃焼器の正面図である。FIG. 1 is a front view of a low NOx combustor according to the present invention.

【図２】図１のＡ−Ａ線における断面図である。FIG. 2 is a sectional view taken along line AA of FIG.

【図３】ハイブリッド燃焼弁の構成を示す図２の部分拡
大図である。FIG. 3 is a partially enlarged view of FIG. 2 showing a configuration of a hybrid combustion valve.

【図４】従来の二流体サイクルの一例を示す構成図であ
る。FIG. 4 is a configuration diagram showing an example of a conventional two-fluid cycle.

【符号の説明】[Explanation of symbols]

１ ガスタービン設備 ２ 水蒸気 ３ 混合器 ４ 圧縮空気 ５ 燃焼器 ６ 排熱回収ボイラ １０ 低ＮＯｘ燃焼器 １２ 燃焼缶 １２ａ 燃焼室 １３ 燃焼器本体 １４ パイロット燃焼器 １５ ハイブリッド噴射弁 １６ 希薄予混合燃焼噴射弁 １８ 蒸気噴射拡散燃焼噴射弁 ２０ 切換器 Ａ 空気 Ｅ 排熱 Ｆ 燃料 Ｗ 給水 Ｓ 水蒸気 DESCRIPTION OF SYMBOLS 1 Gas turbine equipment 2 Steam 3 Mixer 4 Compressed air 5 Combustor 6 Exhaust heat recovery boiler 10 Low NOx combustor 12 Combustion can 12a Combustion chamber 13 Combustor body 14 Pilot combustor 15 Hybrid injection valve 16 Lean premixed combustion injection valve 18 Steam injection diffusion combustion injection valve 20 Switch A Air E Waste heat F Fuel W Feed water S Steam

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｆ２３Ｃ 11/00 ３３２ Ｆ２３Ｃ 11/00 ３３２ Ｆ２３Ｌ 7/00 Ｆ２３Ｌ 7/00 Ｃ Ｆ２３Ｒ 3/28 Ｆ２３Ｒ 3/28 Ｃ Ｂ 3/30 3/30 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 6 Identification code FI F23C 11/00 332 F23C 11/00 332 F23L 7/00 F23L 7/00 C F23R 3/28 F23R 3/28 C B 3/30 3/30

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 一端が開口した中空円筒形の燃焼缶と、
該燃焼缶内に火炎を噴射するように他端中央部に配置さ
れたパイロット燃焼器と、該パイロット燃焼器のまわり
に配置された複数のハイブリッド噴射弁とを備え、 前記パイロット燃焼器は蒸気を用いない拡散燃焼管であ
り、前記ハイブリッド噴射弁は、燃料と空気を予混合し
て希薄燃焼させる希薄予混合燃焼噴射弁と燃料を拡散燃
焼させこれに蒸気を混入する蒸気噴射拡散燃焼噴射弁と
が組み合わされている、ことを特徴とする二流体サイク
ル用の低ＮＯｘ燃焼器。1. A hollow cylindrical combustion can open at one end,
A pilot combustor arranged at the center of the other end so as to inject a flame into the combustion can, and a plurality of hybrid injection valves arranged around the pilot combustor; A diffusion combustion tube not used, wherein the hybrid injection valve is a lean premixed combustion injection valve for premixing fuel and air to perform lean combustion, and a vapor injection diffusion combustion injection valve for diffusing and burning fuel and mixing steam into the fuel. A low NOx combustor for a two-fluid cycle, wherein: 【請求項２】 前記ハイブリッド噴射弁は、中空円筒形
の予混合室を有する希薄予混合燃焼噴射弁と、該予混合
室内に内蔵された蒸気噴射拡散燃焼噴射弁からなる、こ
とを特徴とする請求項１に記載の二流体サイクル用の低
ＮＯｘ燃焼器。2. The hybrid injection valve according to claim 1, wherein the hybrid injection valve comprises a lean premixed combustion injection valve having a hollow cylindrical premixing chamber, and a steam injection diffusion combustion injection valve incorporated in the premixing chamber. A low NOx combustor for a two-fluid cycle according to claim 1. 【請求項３】 更に、燃料と水蒸気をハイブリッド噴射
弁に供給する切換器を備え、該切換器により、電力需要
が小さく水蒸気の需要が大きいときには、燃料のみを希
薄予混合燃焼噴射弁のみに供給する、ことを特徴とする
請求項１に記載の二流体サイクル用の低ＮＯｘ燃焼器。3. A switching device for supplying fuel and steam to the hybrid injection valve, wherein the switching device supplies only fuel to the lean premixed combustion injection valve only when power demand is small and steam demand is large. The low NOx combustor for a two-fluid cycle according to claim 1, wherein:
JP9183584A 1997-07-09 1997-07-09 Low nox combustor for two-fluid cycle Pending JPH1130422A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9183584A JPH1130422A (en) 1997-07-09 1997-07-09 Low nox combustor for two-fluid cycle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9183584A JPH1130422A (en) 1997-07-09 1997-07-09 Low nox combustor for two-fluid cycle

Publications (1)

Publication Number Publication Date
JPH1130422A true JPH1130422A (en) 1999-02-02

Family

ID=16138382

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9183584A Pending JPH1130422A (en) 1997-07-09 1997-07-09 Low nox combustor for two-fluid cycle

Country Status (1)

Country Link
JP (1) JPH1130422A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001227745A (en) * 1999-12-08 2001-08-24 General Electric Co <Ge> Fuel system configuration and method for staging fuel for gas turbines utilizing both gaseous and liquid fuels
JP2002130674A (en) * 2000-10-25 2002-05-09 Ishikawajima Harima Heavy Ind Co Ltd LOW NOx COMBUSTOR FOR TWO-FLUID CYCLE AND ITS OPERATING METHOD
WO2016056180A1 (en) * 2014-10-08 2016-04-14 川崎重工業株式会社 Gas turbine engine combustor and operating method for same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001227745A (en) * 1999-12-08 2001-08-24 General Electric Co <Ge> Fuel system configuration and method for staging fuel for gas turbines utilizing both gaseous and liquid fuels
JP2002130674A (en) * 2000-10-25 2002-05-09 Ishikawajima Harima Heavy Ind Co Ltd LOW NOx COMBUSTOR FOR TWO-FLUID CYCLE AND ITS OPERATING METHOD
WO2016056180A1 (en) * 2014-10-08 2016-04-14 川崎重工業株式会社 Gas turbine engine combustor and operating method for same

Similar Documents

Publication Publication Date Title
US20060101814A1 (en) Combustor of a gas turbine
EP0399336A1 (en) Combustor and method of operating same
JPH03175211A (en) Combustor, combustor for turbine, burner and method of combustion
JP2001182908A (en) LOW NOx BURNR AND METHOD OF COMBUSTION IN LOW NOx BURNER
JPH1130422A (en) Low nox combustor for two-fluid cycle
JP2005526205A (en) Burner and its driving method
JPH1130421A (en) Low nox combustor for two-fluid cycle
JP3706455B2 (en) Hydrogen / oxygen combustor for hydrogen combustion turbine
JP2755603B2 (en) Gas turbine combustor
JPH10110630A (en) Fuel plant for gas turbine combustor
JPH09152105A (en) Low nox burner for gas turbine
JPH06213452A (en) Burner and operating method therefor
JP3632590B2 (en) Fuel cell system
JP4635324B2 (en) Low NOx combustor for two-fluid cycle and operation method thereof
JPH09145011A (en) Combustor
JP2000329346A (en) Premixture combustor and co-generation system having the combustor
JPH1151312A (en) Low nox combustion equipment for liquid fuel
JP4018809B2 (en) Additional combustion method using gas turbine exhaust gas and additional burner using this additional combustion method
JP3585960B2 (en) Gas turbine combustor for low calorie gas
JPH06294517A (en) Premixing combustor
JPH066952U (en) Gas turbine combustor
KR101041466B1 (en) The low NOx gas turbine combustor having the multi-fuel mixing device
JP4182414B2 (en) Combustion control method for steam injection gas turbine
JP2004308596A (en) Output control method of steam jet gas turbine
JPH09243083A (en) Gas turbine combustion device