JP2960190B2 - Steam turbine bypass spray system in combined cycle power plant - Google Patents
Steam turbine bypass spray system in combined cycle power plantInfo
- Publication number
- JP2960190B2 JP2960190B2 JP7669691A JP7669691A JP2960190B2 JP 2960190 B2 JP2960190 B2 JP 2960190B2 JP 7669691 A JP7669691 A JP 7669691A JP 7669691 A JP7669691 A JP 7669691A JP 2960190 B2 JP2960190 B2 JP 2960190B2
- Authority
- JP
- Japan
- Prior art keywords
- bypass
- spray
- steam turbine
- steam
- pressure
- 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.)
- Expired - Lifetime
Links
Classifications
-
- 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
- F01K23/10—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 with exhaust fluid of one cycle heating the fluid in another cycle
- F01K23/106—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 with exhaust fluid of one cycle heating the fluid in another cycle with water evaporated or preheated at different pressures in exhaust boiler
-
- 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]
Landscapes
- 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)
Description
［発明の目的］ [Object of the invention]
【０００１】[0001]
【産業上の利用分野】本発明は、ガスタービンと蒸気タ
ービンを複合した発電設備の改良に係わり、特に複数の
ユニット構成のガスタービン・蒸気タービン複合サイク
ル発電設備における蒸気タービンバイパスのスプレー系
統に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a power generation system combining a gas turbine and a steam turbine, and more particularly to a spray system for a steam turbine bypass in a gas turbine / steam turbine combined cycle power generation system having a plurality of units.
【０００２】[0002]
【従来の技術】近年、ガスタービンと蒸気タービンを併
用した複合サイクル発電設備が多用されるようになって
きた。2. Description of the Related Art In recent years, combined cycle power generation equipment using both a gas turbine and a steam turbine has been frequently used.
【０００３】図２は従来の複合サイクル発電設備の概略
構成を示すもので、空気圧縮機１及びガスタービン２に
はガスタービン発電機３が直結されており、また蒸気タ
ービン４には蒸気タービン発電機５が直結されている。
高圧主蒸気配管及び低圧主蒸気配管から分岐するバイパ
ス管の途中には、高圧主蒸気タービンバイパス弁６と低
圧主蒸気タービンバイパス弁７が介挿されており、それ
らの下流側は高圧バイパス減温器８及び低圧バイパス減
温器９を介して復水器１２に連結されている。復水器１
２に貯えられた復水は復水ポンプ１３によって加圧さ
れ、排熱回収蒸気発生器１４に導入される。また、高圧
バイパス減温器８と低圧バイパス減温器９には、復水ポ
ンプ１３からの復水が、高圧バイパス・スプレー配管１
０と低圧バイパス・スプレー配管１１を介して、冷却水
として供給される。FIG. 2 shows a schematic configuration of a conventional combined cycle power generation facility, in which a gas turbine generator 3 is directly connected to an air compressor 1 and a gas turbine 2, and a steam turbine power generator is connected to a steam turbine 4. Machine 5 is directly connected.
A high-pressure main steam turbine bypass valve 6 and a low-pressure main steam turbine bypass valve 7 are interposed in the middle of a bypass pipe branching from the high-pressure main steam pipe and the low-pressure main steam pipe. It is connected to a condenser 12 through a condenser 8 and a low-pressure bypass desuperheater 9. Condenser 1
The condensate stored in 2 is pressurized by a condensate pump 13 and introduced into an exhaust heat recovery steam generator 14. Condensate from the condensate pump 13 is supplied to the high-pressure bypass desuperheater 8 and the low-pressure bypass desuperheater 9.
0 and supplied as cooling water via a low pressure bypass / spray pipe 11.
【０００４】上述の構成の複合サイクル発電設備におい
て、ガスタービン２で発生した高温のガスは排熱回収蒸
気発生器１４へ導かれ、復水ポンプ１３及び高圧給水ポ
ンプ１６によって送り込まれた給水を加熱する。排熱回
収蒸気発生器１４において加熱された給水は蒸気を含む
二相流になり、低圧ドラム１５と高圧ドラム１７で蒸気
相と液相に分離される。分離された蒸気は蒸気タービン
４に導入されて仕事をし、仕事を終えた後、復水器１で
凝縮し、再び給水として復水ポンプ１３によって排熱回
収蒸気発生器１４へと送られる。[0004] In the combined cycle power generation system having the above-described configuration, the high-temperature gas generated in the gas turbine 2 is guided to the exhaust heat recovery steam generator 14, and heats the feedwater sent by the condensate pump 13 and the high-pressure feedwater pump 16. I do. The feedwater heated in the exhaust heat recovery steam generator 14 becomes a two-phase flow containing steam, and is separated into a steam phase and a liquid phase by the low-pressure drum 15 and the high-pressure drum 17. The separated steam is introduced into the steam turbine 4 to perform work. After the work is completed, the steam is condensed in the condenser 1 and sent again to the exhaust heat recovery steam generator 14 by the condensate pump 13 as feed water.
【０００５】高圧主蒸気タービンバイパス弁６と低圧主
蒸気タービンバイパス弁７は、蒸気タービン４の起動時
あるいは停止時に開いて各弁の前圧を調整しつつ余剰蒸
気を復水器１２へ放出する。この時、各バイパス蒸気は
高圧バイパス減温器８及び低圧バイパス減温器９におい
て、高圧バイパス・スプレー配管１０及び低圧バイパス
・スプレー配管１１を介して供給される復水により減温
される。また、高圧バイパス減温器８及び低圧バイパス
減温器９に供給される復水の量は調節弁１８，１９によ
って調節される。［発明の構成］The high-pressure main steam turbine bypass valve 6 and the low-pressure main steam turbine bypass valve 7 are opened when the steam turbine 4 is started or stopped to release excess steam to the condenser 12 while adjusting the pre-pressure of each valve. . At this time, each bypass steam is cooled by the condensate supplied through the high-pressure bypass spray pipe 10 and the low-pressure bypass spray pipe 11 in the high-pressure bypass cooler 8 and the low-pressure bypass cooler 9. The amount of condensed water supplied to the high-pressure bypass desuperheater 8 and the low-pressure bypass desuperheater 9 is adjusted by control valves 18 and 19. [Configuration of the Invention]
【０００６】[0006]
【発明が解決しようとする課題】以上説明した従来の複
合サイクル発電設備において、高圧バイパス・スプレー
配管１０または低圧バイパス・スプレー配管１１に、調
整弁のスティックや復水ポンプの吐出圧低下等の異常が
発生した場合、別軸型の複合サイクル発電設備には、蒸
気タービンのバイパス運用によりガスタービン単独の運
転が可能であるという運用上のフレキシビリティーがあ
るにもかかわらず、蒸気タービンバイパス蒸気の減温水
が確保できないためバイパス運用に移行できず、ガスタ
ービン２や排熱回収蒸気発生器１４に異常がなくても、
プラント全体を停止せざるを得なかった。In the conventional combined cycle power plant described above, the high pressure bypass / spray pipe 10 or the low pressure bypass / spray pipe 11 has abnormalities such as a stick of a regulating valve or a drop in discharge pressure of a condensate pump. In the event of a storm, the separate-shaft combined cycle power plant has the operational flexibility of being able to operate the gas turbine alone by bypassing the steam turbine, but the steam turbine bypass steam Even if the gas turbine 2 and the exhaust heat recovery steam generator 14 have no abnormality,
The entire plant had to be shut down.
【０００７】この場合、プラントの再起動はスプレー配
管の復旧を待って行うことになるため、プラント再起動
には長時間を必要とし、その間は給電運用計画から除外
され、フレキシブルな運用が可能という複合サイクル発
電設備の特徴を損なう要因となっていた。[0007] In this case, since the restart of the plant is performed after the recovery of the spray pipe, the restart of the plant requires a long time, during which time it is excluded from the power supply operation plan, and flexible operation is possible. This was a factor that impaired the characteristics of combined cycle power generation equipment.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
に、本発明の蒸気タービンバイパス・スプレー系統は、
複数のユニット構成のガスタービン．蒸気タービン複合
サイクル発電設備において、各ユニットに対して共通の
蒸気タービンバイパス・スプレーヘッダーと、各ユニッ
トにおいて主蒸気管から分岐しバイパス減温器を介して
復水器に接続されたバイパス・スプレー配管と、前記蒸
気タービンバイパス・スプレーヘッダーと前記各バイパ
ス減温器とをバックアップ・スプレー弁を介して接続す
るバックアップ・スプレー配管と、いずれかのユニット
の前記バイパス・スプレー配管の系統に異常が発生して
前記バイパス減温器のスプレー水に不足を来したときに
前記バックアップスプレー弁を作動させて前記スプレー
水をバックアップさせる制御機構とを具備したことを特
徴とする。In order to achieve the above object, a steam turbine bypass spray system according to the present invention comprises:
Gas turbine with multiple units. In a steam turbine combined cycle power plant, a common
Steam turbine bypass / spray header and each unit
Branch from the main steam pipe at the
Bypass spray piping connected to the condenser and the steam
Gas turbine bypass / spray header and each of the aforementioned bypasses
Connected to the heater through a backup spray valve
Backup / spray piping and any unit
An error has occurred in the bypass / spray piping system
When there is a shortage of spray water in the bypass desuperheater
Activate the backup spray valve to activate the spray
And a control mechanism for backing up water .
【０００９】[0009]
【作用】このように構成した本発明装置においては、自
ユニットの蒸気タービンバイパス・スプレー配管に異常
がある場合でも、他系統からバックアップスプレー水が
供給されるため、健全な蒸気タービンバイパス運用が可
能となり、プラントを停止することなく継続した起動操
作が行えることになる。その結果、蒸気タービンの起動
時間の短縮を図ることができ、また、ガスタービンの単
独運転も可能となる。In the apparatus of the present invention configured as described above, even if there is an abnormality in the steam turbine bypass / spray pipe of the own unit, backup spray water is supplied from another system, so that a sound steam turbine bypass operation can be performed. Thus, a continuous start-up operation can be performed without stopping the plant. As a result, the startup time of the steam turbine can be reduced, and the gas turbine can be operated alone.
【００１０】[0010]
【実施例】次に、図１を参照しながら本発明の実施例を
説明する。なお、図１において、図２におけると同一部
分には同一符号を付し、それらの説明は省略する。Next, an embodiment of the present invention will be described with reference to FIG. In FIG. 1, the same portions as those in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted.
【００１１】図１は本発明による複合サイクル発電設備
の概略系統を示すもので、同一構成の２つのガスタービ
ン・蒸気タービン複合サイクル発電ユニットＡ，Ｂが並
列的に設置されており、両ユニットの復水ポンプ１３の
吐出側配管には、それぞれ逆止弁２０を介して、蒸気タ
ービンバイパス・バックアップスプレーヘッダー２１が
接続されている。この蒸気タービンバイパス・バックア
ップスプレーヘッダー２１と、各高圧バイパス減温器８
及び低圧バイパス減温器９との間を連結する高圧バイパ
ス・バックアップスプレー配管２２、低圧バイパス・バ
ックアップスプレー配管２３との間には、それぞれバッ
クアップスプレー調節弁２４，２５が介挿されている。FIG. 1 shows a schematic system of a combined cycle power generation system according to the present invention, in which two gas turbine / steam turbine combined cycle power generation units A and B having the same configuration are installed in parallel. A steam turbine bypass / backup spray header 21 is connected to a discharge-side pipe of the condensate pump 13 via a check valve 20, respectively. This steam turbine bypass / backup spray header 21 and each high-pressure bypass desuperheater 8
Backup spray control valves 24 and 25 are interposed between the high pressure bypass / backup spray pipe 22 and the low pressure bypass / backup spray pipe 23 connecting the low pressure bypass / warmer 9 and the low pressure bypass / warmer 9, respectively.
【００１２】上記構成の本発明装置において、Ａ，Ｂ両
ユニットのガスタービン２にて発生した高温のガスは、
排熱回収蒸気発生器１４へ導かれ、復水ポンプ１３及び
高圧給水ポンプ１６によって加圧・供給される給水を加
熱する。排熱回収蒸気発生器１４において加熱された給
水は蒸気を含む二相流となり、低圧ドラム１５と高圧ド
ラム１７において蒸気相と液相とに分離される。分離さ
れた蒸気は、蒸気タービン４に送られ、そこで仕事をし
た後、復水器１２で凝縮し、再び給水として復水ポンプ
１３によって排熱回収蒸気発生器１４へと送られる。In the apparatus of the present invention having the above-described structure, the high-temperature gas generated in the gas turbine 2 of both the A and B units is
The feed water guided to the exhaust heat recovery steam generator 14 and heated and supplied by the condensing pump 13 and the high-pressure feed pump 16 is heated. The feedwater heated in the exhaust heat recovery steam generator 14 becomes a two-phase flow containing steam, and is separated into a steam phase and a liquid phase in the low-pressure drum 15 and the high-pressure drum 17. The separated steam is sent to the steam turbine 4, where work is performed, then condensed in the condenser 12, and sent again to the exhaust heat recovery steam generator 14 by the condensate pump 13 as feed water.
【００１３】高圧主蒸気タービンバイパス弁６と低圧主
蒸気タービンバイパス弁７は蒸気タービン４の起動時或
いは停止時に開いて各弁の前圧を調整しつつ余剰蒸気を
復水器１２へ放出する。The high-pressure main steam turbine bypass valve 6 and the low-pressure main steam turbine bypass valve 7 are opened when the steam turbine 4 is started or stopped to release the excess steam to the condenser 12 while adjusting the pre-pressure of each valve.
【００１４】ここで、高圧バイパス・スプレー配管１０
または低圧バイパス・スプレー配管１１のいずれかの系
統に異常（調節弁１８，１９のスティックや復水ポンプ
１３の吐出圧低下など）が発生した場合には、異常ユニ
ット側のバックアップスプレー調節弁２４，２５が作動
し、高圧バイパス減温器８及び低圧バイパス減温器９へ
の蒸気タービンバイパス・スプレー水は蒸気タービンバ
イパス・バッアップスプレーヘッダー１８から供給さ
れ、蒸気タービンバイパス蒸気の減温を行う。Here, the high-pressure bypass spray pipe 10
Alternatively, if an abnormality (such as a stick of the control valves 18 and 19 or a decrease in the discharge pressure of the condensate pump 13) occurs in any system of the low-pressure bypass / spray pipe 11, the backup spray control valve 24, The steam turbine bypass / spray water to the high-pressure bypass desuperheater 8 and the low-pressure bypass desuperheater 9 is supplied from the steam turbine bypass / backup spray header 18 to reduce the temperature of the steam turbine bypass steam.
【００１５】上述のように、本発明においては、Ａ，Ｂ
両ユニットの高圧バイパス・スプレー配管１０および低
圧バイパス・スプレー配管１１の間に、蒸気タービンバ
イパス・バックアップスプレーヘッダー２１を設けたこ
とにより、蒸気タービンバイパス・スプレー系統に、調
節弁１８，１９のスティックや復水ポンプ１３の吐出圧
低下等の異常が発生した場合でも、蒸気タービンのバイ
パス運用が可能であり、ガスタービン単独運転が可能で
ある。また、蒸気タービンの起動及び再起動時の蒸気条
件確立に要する時間の短縮が可能となり、プラントの稼
働率の向上を図ることができる。As described above, in the present invention, A, B
By providing the steam turbine bypass / backup spray header 21 between the high pressure bypass / spray pipe 10 and the low pressure bypass / spray pipe 11 of both units, the steam turbine bypass / spray system can be provided with the sticks of the control valves 18 and 19 and the like. Even when an abnormality such as a drop in the discharge pressure of the condensate pump 13 occurs, the bypass operation of the steam turbine is possible, and the gas turbine can be operated alone. In addition, the time required for establishing the steam conditions at the time of starting and restarting the steam turbine can be reduced, and the operation rate of the plant can be improved.
【００１６】[0016]
【発明の効果】本発明によると、自ユニットの蒸気ター
ビンバイパス・スプレー系統に異常が生じた場合にも、
蒸気タービンバックアップ・スプレーヘッダーを経由し
て、他ユニットからスプレー水を供給できるため、負荷
要求に対して遅延なくガスタービンを起動することが可
能になり、複合サイクル発電設備の特徴である高効率運
用の条件を早期に確立させることが出来ると共に、起動
・停止といったフレキシブルな運用に対する信頼性を一
段と向上させることが可能となる。According to the present invention, even if an abnormality occurs in the steam turbine bypass / spray system of its own unit,
Spray water can be supplied from another unit via the steam turbine backup / spray header, so that the gas turbine can be started without delay in response to load demands, and high efficiency operation, which is a feature of combined cycle power generation equipment Can be established at an early stage, and the reliability of flexible operation such as starting and stopping can be further improved.
【図１】本発明における複合サイクル発電設備の概略系
統図である。FIG. 1 is a schematic system diagram of a combined cycle power generation facility according to the present invention.
【図２】従来技術における複合サイクル発電設備の概略
系統図である。FIG. 2 is a schematic system diagram of a combined cycle power generation facility according to the related art.
１………空気圧縮器 ２………ガスタービン ３………ガスタービン発電機 ４………蒸気タービン ５………蒸気タービン発電機 ６………高圧主蒸気タービンバイパス弁 ７………低圧主蒸気タービンバイパス弁 ８………高圧バイパス減温器 ９………低圧バイパス減温器 １０………高圧バイパス・スプレー配管 １１………低圧バイパス・スプレー配管 １２………復水器 １３………復水ポンプ １４………排熱回収蒸気発生器 １５………低圧ドラム １６………高圧給水ポンプ １７………高圧ドラム １８，１９…調節弁 ２０………逆止弁 ２１………蒸気タービンバイパス・スプレーヘッダー ２２………高圧バイパス・バックアップスプレー配管 ２３………低圧バイパス・バックアップスプレー配管 ２４，２５…バックアップスプレー調節弁 1 ... Air compressor 2 ... Gas turbine 3 ... Gas turbine generator 4 ... Steam turbine 5 ... Steam turbine generator 6 ... High-pressure main steam turbine bypass valve 7 ... Low pressure Main steam turbine bypass valve 8 High pressure bypass cooler 9 Low pressure bypass cooler 10 High pressure bypass spray pipe 11 Low pressure bypass spray pipe 12 Condenser 13 … Condenser pump 14… Exhaust heat recovery steam generator 15… Low pressure drum 16… High pressure water supply pump 17… High pressure drum 18, 19… Control valve 20… Check valve 21… ... Steam turbine bypass / spray header 22 ... High pressure bypass / backup spray piping 23 ... Low pressure bypass / backup spray piping 24,25 ... Backup spray control valve
Claims (1)
気タービン複合サイクル発電設備において、各ユニット
に対して共通の蒸気タービンバイパス・スプレーヘッダ
ーと、各ユニットにおいて主蒸気管から分岐しバイパス
減温器を介して復水器に接続されたバイパス・スプレー
配管と、前記蒸気タービンバイパス・スプレーヘッダー
と前記各バイパス減温器とをバックアップ・スプレー弁
を介して接続するバックアップ・スプレー配管と、いず
れかのユニットの前記バイパス・スプレー配管の系統に
異常が発生して前記バイパス減温器のスプレー水に不足
を来したときに前記バックアップスプレー弁を作動させ
て前記スプレー水をバックアップさせる制御機構とを具
備したことを特徴とする蒸気タービンバイパス・スプレ
ー系統。In a gas turbine / steam turbine combined cycle power generation facility having a plurality of units, each unit
Steam turbine bypass and spray header
-In each unit, bypass from the main steam pipe
Bypass spray connected to condenser through desuperheater
Piping and steam turbine bypass / spray header
And a backup spray valve between each of the bypass desuperheaters
And backup spray piping connected via
To the bypass / spray piping system of any of these units
An error has occurred and the spray water of the bypass desuperheater is insufficient.
When the backup spray valve is activated
And a control mechanism for backing up the spray water.
A steam turbine bypass spray system that is equipped with:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7669691A JP2960190B2 (en) | 1991-04-10 | 1991-04-10 | Steam turbine bypass spray system in combined cycle power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7669691A JP2960190B2 (en) | 1991-04-10 | 1991-04-10 | Steam turbine bypass spray system in combined cycle power plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04311607A JPH04311607A (en) | 1992-11-04 |
| JP2960190B2 true JP2960190B2 (en) | 1999-10-06 |
Family
ID=13612654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7669691A Expired - Lifetime JP2960190B2 (en) | 1991-04-10 | 1991-04-10 | Steam turbine bypass spray system in combined cycle power plant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2960190B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2363577A1 (en) * | 2010-02-24 | 2011-09-07 | Alstom Technology Ltd | Steam turbine plant |
| JP4888578B2 (en) * | 2010-04-15 | 2012-02-29 | 住友金属鉱山株式会社 | Nickel oxide ore wet smelting plant and method of operation thereof |
-
1991
- 1991-04-10 JP JP7669691A patent/JP2960190B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04311607A (en) | 1992-11-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19990713 |