JPH06212909A - Compound electric power plant - Google Patents
Compound electric power plantInfo
- Publication number
- JPH06212909A JPH06212909A JP5026127A JP2612793A JPH06212909A JP H06212909 A JPH06212909 A JP H06212909A JP 5026127 A JP5026127 A JP 5026127A JP 2612793 A JP2612793 A JP 2612793A JP H06212909 A JPH06212909 A JP H06212909A
- Authority
- JP
- Japan
- Prior art keywords
- boiler
- heat
- gas
- gas turbine
- amount
- 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
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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Feeding And Controlling Fuel (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Air Supply (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ガスタービンの排気を
燃焼用空気としてボイラへ投入する複合発電プラントに
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combined cycle power plant for introducing exhaust gas from a gas turbine into a boiler as combustion air.
【０００２】[0002]
【従来の技術】ガスタービンの排気を燃焼用空気として
ボイラへ投入する複合発電プラントは、既存のボイラ・
タービンによる蒸気発電プラントの出力増加と高効率化
を狙って行われることが多い。この場合、複合発電プラ
ントにあっては、図５に示すように、ガスタービン１の
排気２を燃焼用空気の全部又は図示するようにその一部
としてボイラ３へ投入することにより、ボイラ３を通過
するガスが増大しボイラ出口排ガスの温度が上昇するた
め、ボイラ３の後流側にスタックガスクーラ４を設置
し、排熱の回収を図っている。2. Description of the Related Art A combined cycle power plant that puts gas turbine exhaust into a boiler as combustion air is an existing boiler
This is often done with the aim of increasing the output and increasing the efficiency of steam power plants using turbines. In this case, in the combined cycle power plant, as shown in FIG. 5, the exhaust gas 2 of the gas turbine 1 is fed into the boiler 3 as the whole or a part of the combustion air, as shown in FIG. Since the amount of passing gas increases and the temperature of the exhaust gas from the boiler rises, a stack gas cooler 4 is installed on the downstream side of the boiler 3 to recover exhaust heat.
【０００３】なお、その他の構成について説明すると、
ガスタービン１には、燃焼器５で燃料６を圧縮機７から
の空気８によって燃焼させることにより発生したガスが
供給され、発電機９が駆動される。また、ボイラ３には
燃料１０が投入され、前述したガスタービン排気２に加
え、押込ファン１１及び空気予熱器１２を経てボイラ３
へ投入された空気１３によって燃焼させられる。そし
て、その燃焼排ガス１４は過熱器１５、再熱器１６及び
節炭器１７を通過した後、その一部は前述したスタック
ガスクーラ４に供給され、また残りは前述した空気予熱
器１２に供給され、その後両者は合流して煙突１８から
大気中へ排出される。The other components will be described below.
The gas turbine 1 is supplied with gas generated by burning the fuel 6 in the combustor 5 with the air 8 from the compressor 7, and the generator 9 is driven. Further, the fuel 10 is injected into the boiler 3, and in addition to the gas turbine exhaust 2 described above, the boiler 3 is passed through the pushing fan 11 and the air preheater 12.
It is burned by the air 13 introduced into. Then, after the combustion exhaust gas 14 passes through the superheater 15, the reheater 16 and the economizer 17, a part thereof is supplied to the stack gas cooler 4 described above, and the rest is supplied to the air preheater 12 described above. After that, the two merge and are discharged from the chimney 18 into the atmosphere.
【０００４】一方、ボイラ３内の過熱器１５で過熱され
た蒸気１９は高圧タービン２０に供給されて仕事をした
後再熱器１６に供給され、再び過熱された後中圧（又は
低圧）タービン２１に供給されて仕事をし、発電機２２
を駆動する。そして、このタービン２１で仕事を終えた
蒸気１９は復水器２３で冷却されて水２４となる。この
水２４の一部は低圧給水加熱器２５で中圧（又は低圧）
タービン２１からの抽気２６によって、また残りが前述
したスタックガスクーラ４でボイラ排ガス１４によって
それぞれ加熱された後合流し、脱気器２７で脱気され
る。この脱気された水２４の一部は高圧給水加熱器２８
で高圧タービン２０からの抽気２６によって、また残り
が前述したスタックガスクーラ４でボイラ排ガス１４に
よってそれぞれ加熱された後合流し、節炭器１７に供給
されて加熱される。On the other hand, the steam 19 superheated by the superheater 15 in the boiler 3 is supplied to the high-pressure turbine 20 for work, and then supplied to the reheater 16 and then reheated and then the intermediate-pressure (or low-pressure) turbine. Powered by 21 to work, generator 22
To drive. Then, the steam 19 that has finished its work in the turbine 21 is cooled by the condenser 23 to become water 24. Part of this water 24 is medium pressure (or low pressure) in the low-pressure feed water heater 25.
After being heated by the bleed air 26 from the turbine 21 and the rest being heated by the boiler exhaust gas 14 in the stack gas cooler 4 described above, they merge and are deaerated by the deaerator 27. A part of the degassed water 24 is a high pressure feed water heater 28.
Is heated by the extraction air 26 from the high-pressure turbine 20 and the rest is heated by the boiler exhaust gas 14 in the stack gas cooler 4 described above, and then combined and supplied to the economizer 17 to be heated.
【０００５】[0005]
【発明が解決しようとする課題】以上述べた従来の複合
発電プラントにあっては、所定のガスタービン出力を得
るために、ガスタービン１入口の燃焼器５へ投入する燃
料６の量が増大し、ガスタービン排気２がボイラ３に持
込む熱量も増加する。したがって、ボイラ出口排ガス１
４が持つ熱量も増大するので、これをスタックガスクー
ラ４により回収するようにしているが、この場合、所定
のボイラ入口給水温度を得るために、蒸気タービン抽気
２６は減少するか又は全く抽気を行わなくなる。そし
て、この抽気量の減少とともに、蒸気タービン２０，２
１の飲み込み蒸気量は減少し、その分蒸気タービン出力
が減少する。また、蒸気タービン入口蒸気量の減少に伴
ない、復水器２３へ投入される蒸気１９の量が相対的に
増大し、復水器損失（復水器で捨てられる熱量）の割合
が増大する。In the above-described conventional combined cycle power plant, the amount of fuel 6 injected into the combustor 5 at the inlet of the gas turbine 1 is increased in order to obtain a predetermined gas turbine output. The amount of heat that the gas turbine exhaust 2 brings into the boiler 3 also increases. Therefore, boiler exhaust gas 1
Since the heat quantity of No. 4 also increases, it is designed to be recovered by the stack gas cooler 4. In this case, in order to obtain a predetermined boiler inlet feed water temperature, the steam turbine extraction air 26 is reduced or no extraction is performed. Disappear. Then, along with the decrease in the extraction amount, the steam turbines 20, 2
The amount of swallowed steam of 1 decreases, and the steam turbine output decreases accordingly. In addition, as the steam amount at the steam turbine inlet decreases, the amount of steam 19 injected into the condenser 23 relatively increases, and the ratio of condenser loss (heat amount discarded in the condenser) increases. .
【０００６】本発明は、このような従来技術の課題を解
決するためになされたもので、所定の発電量、すなわち
所定のガスタービン出力又はボイラ出力を得るために必
要な燃料投入量を低減でき、またスタックガスクーラで
の給水加熱量を減少させ、蒸気タービンよりの抽気量を
増大させて蒸気タービン出力を増大でき、更に復水器の
損失を減少できる複合発電プラントを提供することを目
的とする。The present invention has been made in order to solve the problems of the prior art, and can reduce the amount of fuel input required to obtain a predetermined amount of power generation, that is, a predetermined gas turbine output or boiler output. Another object of the present invention is to provide a combined power generation plant that can reduce the feed water heating amount in the stack gas cooler, increase the extraction amount from the steam turbine to increase the steam turbine output, and further reduce the condenser loss. .
【０００７】[0007]
【課題を解決するための手段】上記の目的を達成するた
めに、請求項１記載の本発明は、ガスタービンの排気を
燃焼用空気としてボイラへ投入する複合発電プラントに
おいて、前記ボイラの排ガス熱を用いて、ガスタービン
入口の燃焼器へ投入される空気及び燃料の少なくとも一
方を加熱する熱交換器を設けたものである。In order to achieve the above-mentioned object, the present invention according to claim 1 is a combined cycle power plant in which exhaust gas of a gas turbine is injected into a boiler as combustion air. Is used to provide a heat exchanger for heating at least one of air and fuel introduced into the combustor at the inlet of the gas turbine.
【０００８】また、同じく上記の目的を達成するため
に、請求項２記載の本発明は、ガスタービンの排気を燃
焼用空気としてボイラへ投入する複合発電プラントにお
いて、前記ボイラの排ガス熱を用いて、ボイラへ投入さ
れる燃料及びガスタービン排気の少なくとも一方を加熱
する熱交換器を設けたものである。Further, in order to achieve the above-mentioned object, the present invention according to claim 2 uses the exhaust gas heat of the boiler in a combined cycle power plant in which the exhaust gas of a gas turbine is introduced into a boiler as combustion air. A heat exchanger for heating at least one of fuel injected into the boiler and gas turbine exhaust is provided.
【０００９】[0009]
【作用】請求項１記載の本発明によれば、ガスタービン
の燃焼用空気及び／又は燃料をボイラ排ガスが保有する
熱を用いて加熱（予熱）してから、ガスタービン入口の
燃焼器へ投入することにより、所定のガスタービン入口
ガス温度、すなわち所定のガスタービン出力を得るため
に必要な燃料投入量を低減することができ、ガスタービ
ンサイクルの効率を上昇させることができる。According to the first aspect of the present invention, the combustion air and / or fuel of the gas turbine is heated (preheated) by using the heat held in the boiler exhaust gas, and then is introduced into the combustor at the gas turbine inlet. By doing so, it is possible to reduce the amount of fuel input required to obtain a predetermined gas turbine inlet gas temperature, that is, a predetermined gas turbine output, and it is possible to increase the efficiency of the gas turbine cycle.
【００１０】また、請求項２記載の本発明によれば、ボ
イラの燃料及び／又は燃焼用空気となるガスタービン排
気をボイラ排ガスが保有する熱を用いて加熱（予熱）し
てからボイラへ投入することにより、所定のボイラ出
力、すなわちボイラで蒸気等が得るべき必要熱量を与え
るためのボイラ燃料投入量を減少させることができ、蒸
気タービンサイクルの効率を上昇させることができる。According to the second aspect of the present invention, the gas turbine exhaust serving as the fuel and / or the combustion air of the boiler is heated (preheated) by using the heat held in the boiler exhaust gas, and then is introduced into the boiler. By doing so, it is possible to reduce the boiler fuel input amount for giving a predetermined boiler output, that is, the required amount of heat that steam or the like should obtain in the boiler, and it is possible to increase the efficiency of the steam turbine cycle.
【００１１】更に、請求項１及び２記載のいずれの本発
明によっても、ガスタービンの燃焼用空気及び／又は燃
料或いはボイラの燃料及び／又は燃焼用空気となるガス
タービン排気を加熱するための熱量をボイラ排ガスより
取ることにより、ボイラ排ガス温度が低下し、これによ
りスタックガスクーラで回収すべき熱量が減少する。し
たがって、スタックガスクーラで給水が加熱される量が
減少するため、蒸気タービンよりの抽気量を増大させて
これを補う必要がある。これにより、結果的に蒸気ター
ビン抽気量が増大するため、タービンへ投入できる蒸気
量が増大し、蒸気タービン出力すなわち発電機出力が増
大する。更に、蒸気タービン抽気量の増大に伴い、ター
ビン入口蒸気量に対するタービン出口蒸気量が減少する
ため、復水器の損失が減少する。また、蒸気タービン入
口蒸気量の増大により、ボイラで蒸気が吸収する熱量が
増大するため、ボイラより排出される熱量が低下しボイ
ラ効率も上昇する。以上より、プラント効率を高くする
ことができる。Further, according to the present invention as defined in any one of claims 1 and 2, the heat quantity for heating the gas turbine exhaust serving as combustion air and / or fuel for the gas turbine or fuel and / or combustion air for the boiler. Is taken from the boiler exhaust gas, the temperature of the boiler exhaust gas is lowered, which reduces the amount of heat to be recovered by the stack gas cooler. Therefore, the amount of feed water heated by the stack gas cooler decreases, and it is necessary to increase the amount of bleed air from the steam turbine to compensate for this. As a result, the amount of steam extracted from the steam turbine is increased, so that the amount of steam that can be injected into the turbine is increased and the output of the steam turbine, that is, the output of the generator is increased. Furthermore, as the steam turbine extraction amount increases, the turbine outlet steam amount with respect to the turbine inlet steam amount decreases, so the loss of the condenser decreases. Further, since the amount of heat absorbed by the steam in the boiler increases due to the increase in the steam amount at the steam turbine inlet, the amount of heat discharged from the boiler decreases and the boiler efficiency also increases. From the above, the plant efficiency can be increased.
【００１２】[0012]
【実施例】以下、図面を参照して本発明の実施例につい
て詳細に説明する。Embodiments of the present invention will now be described in detail with reference to the drawings.
【００１３】図１及び図２は請求項１記載の本発明につ
いての２つの異なる実施例を示し、図５に示したものと
同一の部分には同一の符号を付して、重複する説明は省
略する。FIG. 1 and FIG. 2 show two different embodiments of the present invention according to claim 1, and the same parts as those shown in FIG. Omit it.
【００１４】まず図１に示す実施例は、ガスタービン１
の排気２を燃焼用空気としてボイラ３へ投入する複合発
電プラントにおいて、ボイラ排ガス１４の熱を用いて、
ガスタービン１入口の燃焼器５へ投入される空気８を加
熱する熱交換器３１を設けたものである。First, the embodiment shown in FIG. 1 is a gas turbine 1
In a combined cycle power plant in which the exhaust gas 2 of the above is input to the boiler 3 as combustion air, the heat of the boiler exhaust gas 14 is used,
A heat exchanger 31 is provided for heating the air 8 introduced into the combustor 5 at the inlet of the gas turbine 1.
【００１５】なお、この熱交換器３１は本実施例ではヒ
ートパイプ式熱交換器とされ、ヒートパイプを用いてボ
イラ排ガス１４より抽出した熱により圧縮機７出口の空
気、すなわちガスタービン１入口の燃焼器５へ投入され
る空気８が加熱されるようになっているが、ボイラ排ガ
ス１４により該空気８を直接加熱する鋼管式等の他の型
式の熱交換器とすることもできる。また、この熱交換器
３１のボイラ排ガス１４側伝熱面は本実施例ではボイラ
３とスタックガスクーラ４とを結ぶダクトに設けられて
いるが、ボイラ３中に設けることもできる。In this embodiment, the heat exchanger 31 is a heat pipe type heat exchanger, and the heat extracted from the boiler exhaust gas 14 using the heat pipe causes air at the outlet of the compressor 7, that is, at the inlet of the gas turbine 1. Although the air 8 fed into the combustor 5 is heated, the heat exchanger of another type such as a steel pipe type in which the air 8 is directly heated by the boiler exhaust gas 14 can be used. Further, the heat transfer surface of the heat exchanger 31 on the boiler exhaust gas 14 side is provided in the duct connecting the boiler 3 and the stack gas cooler 4 in the present embodiment, but may be provided in the boiler 3.
【００１６】このような熱交換器３１を設けてガスター
ビン１入口の燃焼器５へ投入される空気８を加熱するこ
とにより、燃焼用空気８の温度が上昇するため所定のガ
スタービン入口ガス温度、すなわち所定のガスタービン
出力を得るために必要な燃料６の投入量を減少すること
ができる。By providing such a heat exchanger 31 to heat the air 8 introduced into the combustor 5 at the inlet of the gas turbine 1, the temperature of the combustion air 8 rises, so that the gas temperature at the predetermined gas turbine inlet is increased. That is, it is possible to reduce the input amount of the fuel 6 required to obtain a predetermined gas turbine output.
【００１７】また、ボイラ出口排ガス１４が持つ多大な
熱量を熱交換器３１により回収するため、スタックガス
クーラ４で回収すべき熱量が減少する。したがって、所
定のボイラ入口給水温度を得るための給水２４の加熱は
高圧タービン２０および中圧タービン２１の抽気２６を
用いて高圧給水加熱器２８及び低圧給水加熱器２５によ
り行うこととなる。よって、図５に示した従来例の場合
に比べ蒸気タービン２０，２１よりの抽気２６が増大
し、その分タービンが飲み込み可能な蒸気量が増大し、
蒸気タービン出力が上昇する。また、蒸気タービン入口
蒸気量及びタービン抽気量の増大に伴ない、復水器２３
へ投入される蒸気１９の量が相対的に低下し、復水器損
失の割合が低下する。更に、蒸気タービン入口蒸気量の
増大により、ボイラ３で蒸気１９が吸収する熱量が増大
するため、ボイラより排出される熱量が低下しボイラ効
率も上昇する。Further, since a large amount of heat of the boiler outlet exhaust gas 14 is recovered by the heat exchanger 31, the amount of heat to be recovered by the stack gas cooler 4 is reduced. Therefore, the heating of the feed water 24 to obtain the predetermined boiler inlet feed water temperature is performed by the high pressure feed water heater 28 and the low pressure feed water heater 25 using the extraction air 26 of the high pressure turbine 20 and the intermediate pressure turbine 21. Therefore, as compared with the case of the conventional example shown in FIG. 5, the extraction air 26 from the steam turbines 20 and 21 is increased, and the amount of steam that can be swallowed by the turbine is increased accordingly.
Steam turbine output increases. Further, as the steam turbine inlet steam amount and the turbine extraction amount increase, the condenser 23
The amount of steam 19 injected into the device relatively decreases, and the rate of condenser loss decreases. Furthermore, since the amount of heat absorbed by the steam 19 in the boiler 3 increases due to the increase in the amount of steam at the steam turbine inlet, the amount of heat discharged from the boiler decreases and the boiler efficiency also increases.
【００１８】次に、図２に示す実施例は、ガスタービン
１の排気２を燃焼用空気としてボイラ３へ投入する複合
発電プラントにおいて、ボイラ排ガス１４の熱を用い
て、ガスタービン１入口の燃焼器５へ投入される燃料６
を加熱する熱交換器、本実施例ではヒートパイプ式の熱
交換器３２を設け、これによりガスタービン用燃料６を
加熱するようにしたものである。したがって、本実施例
によっても、図１に示した実施例と同様な作用効果が得
られる。Next, in the embodiment shown in FIG. 2, in the combined power generation plant in which the exhaust gas 2 of the gas turbine 1 is injected into the boiler 3 as combustion air, the heat of the boiler exhaust gas 14 is used to perform combustion at the inlet of the gas turbine 1. Fuel 6 thrown into vessel 5
A heat exchanger that heats the gas turbine, in this embodiment, a heat pipe type heat exchanger 32 is provided to heat the gas turbine fuel 6. Therefore, according to this embodiment, the same operational effect as that of the embodiment shown in FIG. 1 can be obtained.
【００１９】また、図示はしないが、図１、図２に示し
た２つの実施例を組合せ、ガスタービン１入口の燃焼器
５へ投入される空気８及び燃料３の両方を熱交換器で加
熱するようにしても、前述したと同様な作用効果が得ら
れるものである。Although not shown, the two embodiments shown in FIGS. 1 and 2 are combined to heat both the air 8 and the fuel 3 introduced into the combustor 5 at the inlet of the gas turbine 1 with a heat exchanger. Even if it does so, the same effect as described above can be obtained.
【００２０】次に、図３及び図４は請求項２記載の本発
明についての２つの異なる実施例を示し、図５に示した
ものと同一の部分には同一の符号を付して、重複する説
明は省略する。Next, FIGS. 3 and 4 show two different embodiments of the present invention according to claim 2, and the same parts as those shown in FIG. The description will be omitted.
【００２１】まず図３に示す実施例は、ガスタービン１
の排気２を燃焼用空気としてボイラ３へ投入する複合発
電プラントにおいて、ボイラ排ガス１４の熱を用いて、
ボイラ３へ投入される燃料１０を加熱する熱交換器、本
実施例ではヒートパイプ式の熱交換器３３を設けたもの
である。First, the embodiment shown in FIG. 3 is a gas turbine 1.
In a combined cycle power plant in which the exhaust gas 2 of the above is input to the boiler 3 as combustion air, the heat of the boiler exhaust gas 14 is used,
A heat exchanger for heating the fuel 10 charged into the boiler 3, that is, a heat pipe type heat exchanger 33 in this embodiment is provided.
【００２２】このような熱交換器３３を設けてボイラ用
燃料１０をボイラ排ガス１４で加熱することにより、ボ
イラ３へ投入される燃料１０の温度が上昇するため、所
定のボイラ出力、すなわち所定のボイラ入熱を得るため
に必要な燃料１０の投入量が減少する。また、スタック
ガスクーラ４で回収すべき熱量も減少するため、図１に
示した実施例と同様な作用効果を得ることができる。By heating the boiler fuel 10 with the boiler exhaust gas 14 by providing such a heat exchanger 33, the temperature of the fuel 10 charged into the boiler 3 rises, so that a predetermined boiler output, that is, a predetermined boiler output is obtained. The input amount of the fuel 10 required to obtain the heat input to the boiler is reduced. Further, since the amount of heat to be recovered by the stack gas cooler 4 is also reduced, it is possible to obtain the same effect as that of the embodiment shown in FIG.
【００２３】次に、図４に示す実施例は、ガスタービン
１の排気２を燃焼用空気としてボイラ３へ投入する複合
発電プラントにおいて、ボイラ排ガス１４の熱を用い
て、ボイラ３へ燃焼用空気として投入されるガスタービ
ン排気２を加熱する熱交換器、本実施例ではヒートパイ
プ式の熱交換器３４を設けたものである。Next, in the embodiment shown in FIG. 4, in a combined power plant in which the exhaust gas 2 of the gas turbine 1 is injected into the boiler 3 as combustion air, the heat of the boiler exhaust gas 14 is used to supply the combustion air to the boiler 3. A heat exchanger for heating the gas turbine exhaust 2 that is input as the heat exchanger, in this embodiment, a heat pipe type heat exchanger 34 is provided.
【００２４】このような熱交換器３４を設けてボイラ３
へ燃焼用空気として投入されるガスタービン排気２をボ
イラ排ガス１４で加熱することにより、ボイラ３へ投入
される燃焼用空気の温度が上昇するため、図３に示した
実施例と同様に、所定のボイラ出力、すなわち所定のボ
イラ入熱を得るために必要な燃料１０の投入量が減少す
る。また、スタックガスクーラ４で回収すべき熱量も減
少するため、図１に示した実施例と同様な作用効果を得
ることができる。The boiler 3 is provided with such a heat exchanger 34.
By heating the gas turbine exhaust 2 that is input as combustion air to the boiler exhaust gas 14, the temperature of the combustion air that is input to the boiler 3 rises. Therefore, as in the embodiment shown in FIG. The boiler output, that is, the input amount of the fuel 10 required to obtain a predetermined boiler heat input is reduced. Further, since the amount of heat to be recovered by the stack gas cooler 4 is also reduced, it is possible to obtain the same effect as that of the embodiment shown in FIG.
【００２５】[0025]
【発明の効果】以上述べたように、請求項１記載の本発
明によれば、ガスタービンの燃焼用空気及び／又は燃料
をボイラ排ガスが保有する熱を用いて加熱してから、ガ
スタービン入口の燃焼器へ投入することにより、所定の
ガスタービン入口ガス温度、すなわち所定のガスタービ
ン出力を得るために必要な燃料投入量を低減することが
でき、ガスタービンサイクルの効率を上昇させることが
できる。As described above, according to the first aspect of the present invention, the combustion air and / or the fuel of the gas turbine is heated by using the heat of the boiler exhaust gas, and then the gas turbine inlet is used. By injecting the gas into the combustor, it is possible to reduce the fuel injection amount required to obtain a predetermined gas turbine inlet gas temperature, that is, a predetermined gas turbine output, and it is possible to increase the efficiency of the gas turbine cycle. .
【００２６】また、請求項２記載の本発明によれば、ボ
イラの燃料及び／又は燃焼用空気となるガスタービン排
気をボイラ排ガスが保有する熱を用いて加熱してからボ
イラへ投入することにより、所定のボイラ出力、すなわ
ちボイラで蒸気等が得るべき必要熱量を与えるためのボ
イラ燃料投入量を減少させることができ、蒸気タービン
サイクルの効率を上昇させることができる。According to the second aspect of the present invention, by heating the gas turbine exhaust serving as the fuel and / or the combustion air of the boiler by using the heat held in the boiler exhaust gas, it is introduced into the boiler. It is possible to reduce the boiler fuel input amount for giving a predetermined boiler output, that is, the required amount of heat that steam or the like should obtain in the boiler, and it is possible to increase the efficiency of the steam turbine cycle.
【００２７】更に、請求項１及び２記載のいずれの本発
明によっても、蒸気タービン抽気量の増大により蒸気タ
ービンに投入できる蒸気量が増大し、蒸気タービン出力
が増加するとともに、復水器損失の割合を減少させるこ
とができ、蒸気タービンサイクルの効率を上昇させるこ
とができる。Further, according to the present invention as set forth in any one of claims 1 and 2, the amount of steam that can be injected into the steam turbine is increased due to an increase in the steam turbine extraction amount, the steam turbine output is increased, and the condenser loss is increased. The rate can be reduced and the efficiency of the steam turbine cycle can be increased.
【００２８】以上より、本発明によれば、複合発電プラ
ントの効率の上昇、プラント出力の増加を図ることがで
き、所定の発電量を得るための燃料使用量を減少させる
ことができる。As described above, according to the present invention, it is possible to increase the efficiency of the combined power generation plant and increase the plant output, and it is possible to reduce the amount of fuel used to obtain a predetermined amount of power generation.
【図１】請求項１記載の本発明に係る複合発電プラント
の一実施例を示す系統図である。FIG. 1 is a system diagram showing an embodiment of a combined cycle power plant according to the present invention according to claim 1.
【図２】同じく請求項１記載の本発明に係る複合発電プ
ラントの他の実施例を示す系統図である。FIG. 2 is a system diagram showing another embodiment of the combined cycle power plant according to the present invention as defined in claim 1;
【図３】請求項２記載の本発明に係る複合発電プラント
の一実施例を示す系統図である。FIG. 3 is a system diagram showing an embodiment of a combined cycle power plant according to the present invention as set forth in claim 2.
【図４】同じく請求項２記載の本発明に係る複合発電プ
ラントの他の実施例を示す系統図である。FIG. 4 is a system diagram showing another embodiment of the combined power generation plant according to the present invention as defined in claim 2;
【図５】従来の複合発電プラントを示す系統図である。FIG. 5 is a system diagram showing a conventional combined cycle power plant.
１ ガスタービン ２ 排気 ３ ボイラ ５ 燃焼器 ６ 燃料 ７ 圧縮機 ８ 空気 １０ 燃料 １４ 排ガス ３１ 熱交換器 ３２ 熱交換器 ３３ 熱交換器 ３４ 熱交換器 1 Gas Turbine 2 Exhaust 3 Boiler 5 Combustor 6 Fuel 7 Compressor 8 Air 10 Fuel 14 Exhaust Gas 31 Heat Exchanger 32 Heat Exchanger 33 Heat Exchanger 34 Heat Exchanger
Claims (2)
イラへ投入する複合発電プラントにおいて、前記ボイラ
の排ガス熱を用いて、ガスタービン入口の燃焼器へ投入
される空気及び燃料の少なくとも一方を加熱する熱交換
器を設けたことを特徴とする複合発電プラント。1. In a combined cycle power plant in which exhaust gas of a gas turbine is supplied to a boiler as combustion air, the exhaust gas heat of the boiler is used to heat at least one of air and fuel injected into a combustor at the gas turbine inlet. A combined cycle power plant having a heat exchanger that operates.
イラへ投入する複合発電プラントにおいて、前記ボイラ
の排ガス熱を用いて、ボイラへ投入される燃料及びガス
タービン排気の少なくとも一方を加熱する熱交換器を設
けたことを特徴とする複合発電プラント。2. A heat exchange for heating at least one of fuel injected into a boiler and gas turbine exhaust by using exhaust gas heat of the boiler in a combined cycle power plant that inputs the exhaust of a gas turbine to a boiler as combustion air. Combined power plant characterized by having a power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5026127A JPH06212909A (en) | 1993-01-21 | 1993-01-21 | Compound electric power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5026127A JPH06212909A (en) | 1993-01-21 | 1993-01-21 | Compound electric power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06212909A true JPH06212909A (en) | 1994-08-02 |
Family
ID=12184905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5026127A Pending JPH06212909A (en) | 1993-01-21 | 1993-01-21 | Compound electric power plant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06212909A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5673634A (en) * | 1992-11-17 | 1997-10-07 | Apparatebau Rothemuhle Brandt & Kritzler Gmbh | Incineration plant with heat exchanger |
| JP2010254544A (en) * | 2009-03-30 | 2010-11-11 | Tokyo Gas Co Ltd | Hydrogen separation type hydrogen production system having carbon dioxide separation recovery device attached thereto |
| JP2011116604A (en) * | 2009-12-04 | 2011-06-16 | Tokyo Gas Co Ltd | Hydrogen separation type hydrogen production system including carbon dioxide separation and recovery apparatus |
| JP2011132103A (en) * | 2009-12-25 | 2011-07-07 | Tokyo Gas Co Ltd | Hybrid hydrogen production system |
| US11274575B2 (en) | 2016-03-29 | 2022-03-15 | Mitsubishi Power, Ltd. | Gas turbine plant and operation method therefor |
| KR20220058348A (en) * | 2020-12-02 | 2022-05-09 | 두산에너빌리티 주식회사 | Hybrid power generation equipment and control method thereof |
| US11702964B2 (en) | 2020-10-30 | 2023-07-18 | Doosan Enerbility Co., Ltd. | Hybrid power generation equipment and control method thereof |
-
1993
- 1993-01-21 JP JP5026127A patent/JPH06212909A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5673634A (en) * | 1992-11-17 | 1997-10-07 | Apparatebau Rothemuhle Brandt & Kritzler Gmbh | Incineration plant with heat exchanger |
| JP2010254544A (en) * | 2009-03-30 | 2010-11-11 | Tokyo Gas Co Ltd | Hydrogen separation type hydrogen production system having carbon dioxide separation recovery device attached thereto |
| JP2011116604A (en) * | 2009-12-04 | 2011-06-16 | Tokyo Gas Co Ltd | Hydrogen separation type hydrogen production system including carbon dioxide separation and recovery apparatus |
| JP2011132103A (en) * | 2009-12-25 | 2011-07-07 | Tokyo Gas Co Ltd | Hybrid hydrogen production system |
| US11274575B2 (en) | 2016-03-29 | 2022-03-15 | Mitsubishi Power, Ltd. | Gas turbine plant and operation method therefor |
| US11702964B2 (en) | 2020-10-30 | 2023-07-18 | Doosan Enerbility Co., Ltd. | Hybrid power generation equipment and control method thereof |
| KR20220058348A (en) * | 2020-12-02 | 2022-05-09 | 두산에너빌리티 주식회사 | Hybrid power generation equipment and control method thereof |
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