JP3787820B2 - Gasification combined power generation facility - Google Patents

Gasification combined power generation facility Download PDF

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JP3787820B2
JP3787820B2 JP2888696A JP2888696A JP3787820B2 JP 3787820 B2 JP3787820 B2 JP 3787820B2 JP 2888696 A JP2888696 A JP 2888696A JP 2888696 A JP2888696 A JP 2888696A JP 3787820 B2 JP3787820 B2 JP 3787820B2
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gas
nitrogen
saturation
facility
combustor
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JPH09222031A (en
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敬一郎 橋本
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石川島播磨重工業株式会社
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
    • F01K23/067—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle the combustion heat coming from a gasification or pyrolysis process, e.g. coal gasification
    • F01K23/068—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle the combustion heat coming from a gasification or pyrolysis process, e.g. coal gasification in combination with an oxygen producing plant, e.g. an air separation plant
    • 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
    • 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]
    • Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a gasification composite generating equipment to increase the output of a gas turbine and reduce the generation of NOx by a combustor without lowering the output of a steam turbine. SOLUTION: Gasification compound generating equipment is formed such that a saturation equipment 5 for fuel gas is provided to humidity fuel gas, in which hydrocarbon fuel is gasified, with steam provided and humidified fuel gas is fed to the combustor 6a of a gas turbine. The gasification compound generating equipment comprises saturation equipment 12 for nitrogen to moisten nitrogen, which is separated, from air with steam; and a nitrogen gas injection line 14 to feed moistened nitrogen gas to the combustor of the gas turbine. Each of the saturation equipment for fuel gas and saturation equipment for nitrogen is provided with a hot water circulation line 13 common to respectively independent multistage contact towers 5a and 12a.

Description

【０００１】
【発明の属する技術分野】
本発明は、炭化水素系燃料をガス化してガスタービンの燃料にするガス化複合発電設備に関する。
【０００２】
【従来の技術】
図２は、従来のガス化複合発電設備のフロー図である。石炭，重質油等の炭化水素系燃料をガス化設備１で水蒸気と酸素ガスを用いてガス化して粗製ガスにし、これを脱塵装置２で脱塵し、粗ガスクーラ３で冷却し湿式脱硫設備４で脱硫してサチュレーション設備５に供給し、更に加湿された燃料ガスをガスタービン発電機６の燃焼器６ａに供給する。一方、ガスタービン発電機６の過剰空気が抽気されて空気分離器７に供給され、抽気空気と大気から空気分離装置７により酸素を分離し、この酸素をガス化設備１に供給してガス化用に供し、分離された窒素ガスはガスタービンの燃焼器に供給される。
【０００３】
ガスタービン発電設備６では、圧縮器６ｂで加圧された圧縮空気により燃料ガスが燃焼し、加湿水蒸気と窒素ガスで増量された燃焼ガスによりガスタービン６ｃを駆動して発電機６ｄにより発電し、ガスタービン６ｃの排ガスは排熱回収ボイラ８に供給されて水蒸気を発生させ、この水蒸気により蒸気タービン９を駆動して発電し、更に排ガスより熱回収して給水加熱し、加熱された給水の一部がサチュレーション設備５に供給されて加湿に用いられる。
【０００４】
サチュレーション設備５は、ガスと水が接触する多段接触塔５ａと熱水を循環させるポンプ５ｂからなり、低温（例えば約４０℃）で流入する燃料ガスを約１５０℃前後の熱水を用いて約１４０℃前後まで加熱するとともに、この温度における飽和点まで水蒸気を加湿している。
【０００５】
【発明が解決しようとする課題】
上述した従来のガス化複合発電設備では、サチュレーション設備５により燃料ガスを昇温及び加湿することにより、燃焼器６ａによる燃焼ガスの流量を増加させてガスタービン発電設備６の出力を増大させ、同時に加湿された水蒸気により燃焼器６ａにおけるＮＯx 発生量を低減している。
【０００６】
しかし、かかる従来のガス化複合発電設備では、空気分離装置７からの窒素ガスによる増量を加えても、出力増加は約１０％程度にすぎず、かつ燃料ガス中の飽和蒸気量だけでは、ＮＯx 低減も十分ではない問題点があった。
そのため、排熱回収ボイラ８で発生する水蒸気を燃焼器６ａに直接噴射してガスタービンの出力増大とＮＯx 低減を図ることも考えられるが、この場合には、過熱水蒸気を消費するので蒸気タービン９の出力低下を招き、発電効率が低下する問題点があった。
【０００７】
本発明は上述した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、蒸気タービンの出力を低下させることなく、ガスタービンの出力増加と燃焼器による低ＮＯx 化を図ることができるガス化複合発電設備を提供することにある。
【０００８】
【課題を解決するための手段】
本発明によれば、炭化水素系燃料をガス化した燃料ガスに水蒸気を加湿する燃料ガス用サチュレーション設備を備え、加湿した燃料ガスをガスタービンの燃焼器に供給するガス化複合発電設備において、空気分離した窒素ガスに水蒸気を加湿する窒素用サチュレーション設備と、加湿した窒素ガスをガスタービンの燃焼器に供給する窒素ガス噴射ラインと、を更に備え、前記燃料ガス用サチュレーション設備と窒素用サチュレーション設備は、それぞれ独立した多段接触塔と共通の熱水循環ラインを備える、ことを特徴とするガス化複合発電設備が提供される。
【００１０】
上記本発明の構成によれば、空気分離設備により大量に発生する窒素ガスに窒素用サチュレーション設備により飽和水蒸気を大量に加湿することができ、窒素ガス噴射ラインにより飽和水蒸気を含んだ大量の窒素ガスをガスタービンの燃焼器に噴射することができる。従って、燃焼器による燃焼ガスの流量を大幅に増加させてガスタービン発電設備の出力を増大させ、同時に加湿された大量の水蒸気により燃焼器におけるＮＯx 発生量を更に低減することができる。
【００１１】
また、排熱回収ボイラと蒸気タービンに供給されるガスタービンの排ガス流量も増大するため、排熱回収ボイラによる蒸気量と蒸気タービンの発電出力も増大する。更に、窒素用サチュレーション設備は、蒸気タービンの排熱で加熱された給水の一部が用いられるので、排熱回収ボイラで発生した水蒸気を全て発電等に有効利用することができ、発電効率も高めることができる。
【００１２】
更に、燃料ガス用サチュレーション設備と窒素用サチュレーション設備が、それぞれ独立した多段接触塔と共通の熱水循環ラインを備えることにより、それぞれのサチュレーション設備を最適条件で運転することができると共に、熱水循環ポンプ等の数量を低減し、設備の簡素化を図ることができる。
【００１３】
【発明の実施の形態】
以下、本発明の好ましい実施形態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、本発明によるガス化複合発電設備の全体フロー図である。この図において、ガス化複合発電設備１０は、炭化水素系燃料をガス化した燃料ガスに水蒸気を加湿する燃料ガス用サチュレーション設備５を備え、加湿した燃料ガスをガスタービン６の燃焼器６ａに供給するようになっている。かかる構成は図２に示した従来のガス化複合発電設備と同様である。
【００１４】
本発明のガス化複合発電設備１０は、空気分離装置７により空気分離した窒素ガスに水蒸気を加湿する窒素用サチュレーション設備１２と、この設備により加湿した窒素ガスをガスタービン６の燃焼器６ａに供給する窒素ガス噴射ライン１４と、を更に備えている。
【００１５】
図１に示すように、燃料ガス用サチュレーション設備５と窒素用サチュレーション設備１２は、それぞれ独立した多段接触塔５ａ，１２ａと共通の熱水循環ライン１３とを備えている。熱水循環ライン１３には、共通ポンプ１３ａが設置され、このポンプ１３ａにより、多段接触塔５ａの循環水をその下部から取り出し上部に供給すると共に、多段接触塔１２ａの循環水もその下部から取り出し上部に供給するようになっている。
【００１６】
窒素用サチュレーション設備１２には、窒素ライン１２ｂを介して空気分離装置７により分離された窒素ガスが供給され、窒素用サチュレーション設備１２で加湿された窒素ガスは、窒素ガス噴射ライン１４により燃焼器６ａに噴射されるようになっている。なお、図１において、１５ａ，１５ｂ，１５ｃ，１５ｄはそれぞれ熱交換器である。
【００１７】
図１のガス化複合発電設備１０は、以下のように作動する。
▲１▼石炭，重質油等の炭化水素系燃料をガス化設備１で水蒸気と酸素ガスを用いてガス化した粗製ガスは、脱塵装置２で脱塵され、熱交換器１５ａ，１５ｂで冷却されて粗ガスクーラ３に入り、ここで更に冷却され湿式脱硫設備４で脱硫されて約４０℃の燃料ガス（精製ガス）となり、サチュレーション設備５に供給され、ここで加湿され熱交換器１５ａで加熱されてガスタービン発電機６の燃焼器６ａに供給される。
【００１８】
▲２▼一方、ガスタービン発電機６の過剰空気の一部は抽気され、熱交換器１５ｃ，１５ｄで冷却されて空気分離器７に供給され、空気分離装置７により分離された酸素はガス化設備１に供給され、余剰窒素ガスは約１６５℃の温度で窒素ライン１２ｂを介して窒素用サチュレーション設備１２に供給される。
▲３▼窒素用サチュレーション設備１２では、熱水循環ライン１３の共通ポンプ１３ａにより、多段接触塔１２ａの循環水がその下部から取り出し上部に供給されており、多段接触塔１２ａの内部で循環水と窒素ガスが気液接触し、窒素ガス中に飽和点まで水蒸気を加湿する。
【００１９】
▲４▼水蒸気を加湿された窒素ガスは、窒素ガス噴射ライン１４を介して熱交換器１５ｃで予熱されて燃焼器６ａに噴射される。ガスタービン発電設備６では、圧縮器６ｂで加圧された圧縮空気により燃料ガスが燃焼し、加湿水蒸気と窒素ガスで増量された燃焼ガスによりガスタービン６ｃを駆動して発電機６ｄにより発電し、ガスタービン６ｃの排ガスは排熱回収ボイラ８に供給されて水蒸気を発生させ、この水蒸気により蒸気タービン９を駆動して発電し、更に排ガスより熱回収して給水加熱し、加熱された給水の一部がサチュレーション設備５及び窒素用サチュレーション設備１２に供給されて加湿に用いられる。
【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に変更できることは勿論である。
【００２１】
【発明の効果】
上述した本発明のガス化複合発電設備１０によれば、空気分離設備７により大量に発生する窒素ガスに窒素用サチュレーション設備１２により飽和水蒸気を大量に加湿することができ、窒素ガス噴射ライン１４により飽和水蒸気を含んだ大量の窒素ガスをガスタービンの燃焼器６ａに噴射することができる。従って、燃焼器６ａによる燃焼ガスの流量を大幅に増加させてガスタービン発電設備６の出力を増大させ、同時に加湿された大量の水蒸気により燃焼器６ａにおけるＮＯx 発生量を更に低減することができる。
【００２２】
また、排熱回収ボイラ８と蒸気タービン９に供給されるガスタービンの排ガス流量も増大するため、排熱回収ボイラ８による蒸気量と蒸気タービンの発電出力も増大する。更に、窒素用サチュレーション設備１２は、蒸気タービンの排熱で加熱された給水の一部が用いられるので、排熱回収ボイラ８で発生した水蒸気を全て発電等に有効利用することができ、発電効率も高めることができる。
【００２３】
更に、燃料ガス用サチュレーション設備５と窒素用サチュレーション設備１２が、それぞれ独立した多段接触塔５ａ，１２ａと共通の熱水循環ライン１３を備えることにより、それぞれのサチュレーション設備を最適条件で運転することができると共に、熱水循環ポンプ１３ａ等の数量を低減し、設備の簡素化を図ることができる。
【００２４】
従って、本発明のガス化複合発電設備は、蒸気タービンの出力を低下させることなく、ガスタービンの出力増加と燃焼器による低ＮＯx 化を図ることができる、等の優れた効果を有する。
【図面の簡単な説明】
【図１】本発明によるガス化複合発電設備の全体フロー図である。
【図２】従来のガス化複合発電設備のフロー図である。
【符号の説明】
１ ガス化設備
２ 脱塵装置
３ 粗ガスクーラ
４ 湿式脱硫設備
５ サチュレーション設備
５ａ 多段接触塔
５ｂ ポンプ
６ ガスタービン発電機
６ａ 燃焼器
６ｂ 圧縮器
６ｃ ガスタービン
６ｄ 発電機
７ 空気分離器
８ 排熱回収ボイラ
９ 蒸気タービン
１０ ガス化複合発電設備
１２ 窒素用サチュレーション設備
１２ａ 多段接触塔
１２ｂ 窒素ライン
１３ 熱水循環ライン
１３ａ 共通ポンプ
１４ 窒素ガス噴射ライン
１５ａ，１５ｂ，１５ｃ，１５ｄ 熱交換器[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a combined gasification power generation facility that gasifies a hydrocarbon-based fuel into fuel for a gas turbine.
[0002]
[Prior art]
FIG. 2 is a flow diagram of a conventional gasification combined power generation facility. Hydrocarbon fuels such as coal and heavy oil are gasified using steam and oxygen gas in the gasification facility 1 to form crude gas, which is dedusted by the dust removing device 2, cooled by the crude gas cooler 3, and wet desulfurized. The sulfur is desulfurized by the equipment 4 and supplied to the saturation equipment 5, and the humidified fuel gas is supplied to the combustor 6 a of the gas turbine generator 6. On the other hand, excess air from the gas turbine generator 6 is extracted and supplied to the air separator 7, oxygen is separated from the extracted air and the atmosphere by the air separation device 7, and this oxygen is supplied to the gasification facility 1 for gasification. The separated and separated nitrogen gas is supplied to the combustor of the gas turbine.
[0003]
In the gas turbine power generation facility 6, the fuel gas is combusted by the compressed air pressurized by the compressor 6b, the gas turbine 6c is driven by the combustion gas increased by the humidified water vapor and nitrogen gas, and the power is generated by the generator 6d. The exhaust gas from the gas turbine 6c is supplied to the exhaust heat recovery boiler 8 to generate steam, and the steam turbine 9 is driven by the steam to generate electric power. Further, heat is recovered from the exhaust gas and heated to feed water. The part is supplied to the saturation equipment 5 and used for humidification.
[0004]
The saturation equipment 5 includes a multi-stage contact tower 5a in which gas and water are in contact with each other and a pump 5b in which hot water is circulated. A fuel gas flowing in at a low temperature (for example, about 40 ° C.) is heated to about 150 ° C. While heating to around 140 ° C., the steam is humidified to the saturation point at this temperature.
[0005]
[Problems to be solved by the invention]
In the conventional combined gasification power generation facility described above, the temperature of the fuel gas is increased and humidified by the saturation facility 5, thereby increasing the flow rate of the combustion gas by the combustor 6a and increasing the output of the gas turbine power generation facility 6. The amount of NOx generated in the combustor 6a is reduced by the humidified water vapor.
[0006]
However, in such a conventional combined gasification power generation facility, even if an increase due to nitrogen gas from the air separation device 7 is added, the output increase is only about 10%, and the amount of saturated steam in the fuel gas alone will cause NOx. There was a problem that the reduction was not sufficient.
Therefore, it is conceivable that the steam generated in the exhaust heat recovery boiler 8 is directly injected into the combustor 6a to increase the output of the gas turbine and reduce NOx. In this case, however, the steam turbine 9 consumes superheated steam. As a result, the power generation efficiency is reduced.
[0007]
The present invention has been developed to solve the above-described problems. That is, an object of the present invention is to provide a combined gasification power generation facility capable of increasing the output of a gas turbine and reducing NOx by a combustor without reducing the output of the steam turbine.
[0008]
[Means for Solving the Problems]
According to the present invention, in a gasification combined power generation facility including a fuel gas saturation facility for humidifying water vapor to a fuel gas obtained by gasifying a hydrocarbon-based fuel, and supplying the humidified fuel gas to a combustor of a gas turbine, A nitrogen saturation facility for humidifying water vapor into the separated nitrogen gas; and a nitrogen gas injection line for supplying the humidified nitrogen gas to a combustor of the gas turbine, wherein the fuel gas saturation facility and the nitrogen saturation facility are There is provided a combined gasification power generation facility comprising a multi-stage contact tower and an independent hot water circulation line .
[0010]
According to the configuration of the present invention, a large amount of saturated water vapor can be humidified by a nitrogen saturation facility to a large amount of nitrogen gas generated by an air separation facility, and a large amount of nitrogen gas containing saturated water vapor can be obtained by a nitrogen gas injection line. Can be injected into the combustor of the gas turbine. Therefore, the flow rate of the combustion gas from the combustor can be greatly increased to increase the output of the gas turbine power generation facility, and at the same time, the amount of NOx generated in the combustor can be further reduced by the large amount of humidified water vapor.
[0011]
Moreover, since the exhaust gas flow rate of the gas turbine supplied to the exhaust heat recovery boiler and the steam turbine also increases, the amount of steam by the exhaust heat recovery boiler and the power generation output of the steam turbine also increase. Further, since the nitrogen saturation facility uses a part of the water supply heated by the exhaust heat of the steam turbine, all the steam generated in the exhaust heat recovery boiler can be effectively used for power generation and the like, and the power generation efficiency is also increased. be able to.
[0012]
Furthermore, the fuel gas saturation facility and the nitrogen saturation facility are provided with independent multi-stage contact towers and a common hot water circulation line, so that each saturation facility can be operated under optimum conditions, and hot water circulation The number of pumps can be reduced and the equipment can be simplified.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the common part in each figure, and the overlapping description is abbreviate | omitted.
FIG. 1 is an overall flow chart of a combined gasification power generation facility according to the present invention. In this figure, a combined gasification power generation facility 10 includes a fuel gas saturation facility 5 for humidifying water vapor to a fuel gas obtained by gasifying a hydrocarbon fuel, and supplies the humidified fuel gas to a combustor 6 a of a gas turbine 6. It is supposed to be. Such a configuration is the same as that of the conventional combined gasification power generation facility shown in FIG.
[0014]
The combined gasification power generation facility 10 of the present invention supplies a nitrogen saturation facility 12 for humidifying water vapor to the nitrogen gas separated by the air separation device 7, and supplies the nitrogen gas humidified by this facility to the combustor 6 a of the gas turbine 6. And a nitrogen gas injection line 14 for performing.
[0015]
As shown in FIG. 1, the fuel gas saturation equipment 5 and the nitrogen saturation equipment 12 include independent multi-stage contact towers 5 a and 12 a and a common hot water circulation line 13. The hot water circulation line 13 is provided with a common pump 13a. The pump 13a takes out the circulating water of the multistage contact tower 5a from its lower part and supplies it to the upper part, and also removes the circulating water of the multistage contact tower 12a from its lower part. It is designed to be supplied to the upper part.
[0016]
Nitrogen gas separated by the air separation device 7 is supplied to the nitrogen saturation facility 12 via the nitrogen line 12b, and the nitrogen gas humidified by the nitrogen saturation facility 12 is combusted by the nitrogen gas injection line 14 in the combustor 6a. Is to be injected. In addition, in FIG. 1, 15a, 15b, 15c, 15d is a heat exchanger, respectively.
[0017]
The gasification combined power generation facility 10 of FIG. 1 operates as follows.
(1) Crude gas obtained by gasifying hydrocarbon fuel such as coal and heavy oil in the gasification facility 1 using water vapor and oxygen gas is dedusted by the dust removing device 2, and is then removed by the heat exchangers 15a and 15b. It is cooled and enters the crude gas cooler 3, where it is further cooled and desulfurized by the wet desulfurization equipment 4 to become a fuel gas (refined gas) of about 40 ° C., which is supplied to the saturation equipment 5, where it is humidified by the heat exchanger 15 a. It is heated and supplied to the combustor 6 a of the gas turbine generator 6.
[0018]
(2) On the other hand, a part of excess air of the gas turbine generator 6 is extracted, cooled by the heat exchangers 15c and 15d, supplied to the air separator 7, and the oxygen separated by the air separator 7 is gasified. The excess nitrogen gas is supplied to the facility 1 and supplied to the nitrogen saturation facility 12 through the nitrogen line 12b at a temperature of about 165 ° C.
(3) In the nitrogen saturation facility 12, the circulating water of the multi-stage contact tower 12a is taken out from the lower part by the common pump 13a of the hot water circulation line 13, and supplied to the upper part. Nitrogen gas comes into gas-liquid contact, and steam is humidified in the nitrogen gas to the saturation point.
[0019]
(4) The nitrogen gas humidified with water vapor is preheated by the heat exchanger 15c through the nitrogen gas injection line 14 and injected into the combustor 6a. In the gas turbine power generation facility 6, the fuel gas is combusted by the compressed air pressurized by the compressor 6b, the gas turbine 6c is driven by the combustion gas increased by the humidified water vapor and nitrogen gas, and the power is generated by the generator 6d. The exhaust gas from the gas turbine 6c is supplied to the exhaust heat recovery boiler 8 to generate steam, and the steam turbine 9 is driven by the steam to generate electric power. Further, heat is recovered from the exhaust gas and heated to feed water. The portion is supplied to the saturation equipment 5 and the nitrogen saturation equipment 12 and used for humidification.
[0020]
In addition, this invention is not limited to embodiment mentioned above, Of course, it can change variously in the range which does not deviate from the summary of this invention.
[0021]
【The invention's effect】
According to the gasification combined power generation facility 10 of the present invention described above, a large amount of saturated water vapor can be humidified by the nitrogen saturation facility 12 to the nitrogen gas generated in a large amount by the air separation facility 7. A large amount of nitrogen gas containing saturated water vapor can be injected into the combustor 6a of the gas turbine. Therefore, the flow rate of the combustion gas from the combustor 6a can be significantly increased to increase the output of the gas turbine power generation facility 6, and at the same time, the amount of NOx generated in the combustor 6a can be further reduced by the large amount of humidified steam.
[0022]
Further, since the exhaust gas flow rate of the gas turbine supplied to the exhaust heat recovery boiler 8 and the steam turbine 9 also increases, the amount of steam by the exhaust heat recovery boiler 8 and the power generation output of the steam turbine also increase. Further, since the nitrogen saturation facility 12 uses a part of the feed water heated by the exhaust heat of the steam turbine, all the water vapor generated in the exhaust heat recovery boiler 8 can be used effectively for power generation, etc. Can also be increased.
[0023]
Further, the fuel gas saturation facility 5 and the nitrogen saturation facility 12 are provided with independent multi-stage contact towers 5a and 12a and a common hot water circulation line 13, respectively, so that each saturation facility can be operated under optimum conditions. In addition, the number of hot water circulation pumps 13a and the like can be reduced, and the equipment can be simplified.
[0024]
Therefore, the combined gasification power generation facility of the present invention has excellent effects such as an increase in the output of the gas turbine and a reduction in NOx by the combustor without reducing the output of the steam turbine.
[Brief description of the drawings]
FIG. 1 is an overall flow diagram of a combined gasification power generation facility according to the present invention.
FIG. 2 is a flow diagram of a conventional gasification combined power generation facility.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Gasification equipment 2 Dedusting device 3 Coarse gas cooler 4 Wet desulfurization equipment 5 Saturation equipment 5a Multistage contact tower 5b Pump 6 Gas turbine generator 6a Combustor 6b Compressor 6c Gas turbine 6d Generator 7 Air separator 8 Waste heat recovery boiler 9 Steam Turbine 10 Gasification Combined Cycle Power Generation Facility 12 Nitrogen Saturation Facility 12a Multistage Contact Tower 12b Nitrogen Line 13 Hot Water Circulation Line 13a Common Pump 14 Nitrogen Gas Injection Lines 15a, 15b, 15c, 15d

Claims (1)

炭化水素系燃料をガス化した燃料ガスに水蒸気を加湿する燃料ガス用サチュレーション設備を備え、加湿した燃料ガスをガスタービンの燃焼器に供給するガス化複合発電設備において、
空気分離した窒素ガスに水蒸気を加湿する窒素用サチュレーション設備と、加湿した窒素ガスをガスタービンの燃焼器に供給する窒素ガス噴射ラインと、を更に備え、
前記燃料ガス用サチュレーション設備と窒素用サチュレーション設備は、それぞれ独立した多段接触塔と共通の熱水循環ラインを備える、ことを特徴とするガス化複合発電設備。In a combined gasification power generation facility that includes a fuel gas saturation facility for humidifying water vapor into a fuel gas obtained by gasifying a hydrocarbon fuel, and supplying the humidified fuel gas to a combustor of a gas turbine,
A nitrogen saturation facility for humidifying water vapor into the nitrogen gas separated from the air; and a nitrogen gas injection line for supplying the humidified nitrogen gas to a combustor of the gas turbine,
The gasification combined power generation facility characterized in that the fuel gas saturation facility and the nitrogen saturation facility each include an independent multistage contact tower and a common hot water circulation line .
JP2888696A 1996-02-16 1996-02-16 Gasification combined power generation facility Expired - Fee Related JP3787820B2 (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
JP2888696A JP3787820B2 (en) 1996-02-16 1996-02-16 Gasification combined power generation facility

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JP3787820B2 true JP3787820B2 (en) 2006-06-21

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Publication number Priority date Publication date Assignee Title
DE19837251C1 (en) * 1998-08-17 2000-02-10 Siemens Ag Fossil-fuel burning gas and steam-turbine installation for power generation
US6343462B1 (en) * 1998-11-13 2002-02-05 Praxair Technology, Inc. Gas turbine power augmentation by the addition of nitrogen and moisture to the fuel gas
DE60033738T2 (en) * 1999-07-01 2007-11-08 General Electric Co. Device for humidifying and heating fuel gas
US7788930B2 (en) * 2007-05-01 2010-09-07 General Electric Company Methods and systems for gas moisturization control
JP5412205B2 (en) * 2009-07-31 2014-02-12 三菱重工業株式会社 Gas turbine plant and gasification fuel power generation facility equipped with the same
JP2013253611A (en) * 2013-09-17 2013-12-19 Mitsubishi Heavy Ind Ltd Gas turbine plant, method of operating the same, and gasification fuel power generation facility including gas turbine plant

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