JPH0861012A - Evaporation amount control device for exhaust gas boiler - Google Patents
Evaporation amount control device for exhaust gas boilerInfo
- Publication number
- JPH0861012A JPH0861012A JP19659294A JP19659294A JPH0861012A JP H0861012 A JPH0861012 A JP H0861012A JP 19659294 A JP19659294 A JP 19659294A JP 19659294 A JP19659294 A JP 19659294A JP H0861012 A JPH0861012 A JP H0861012A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- pressure
- inlet
- evaporator
- evaporation 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.)
- Withdrawn
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
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)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、コンバインドサイクル
プラントの排ガスボイラに適用される蒸発量制御装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an evaporation control device applied to an exhaust gas boiler of a combined cycle plant.
【０００２】[0002]
【従来の技術】従来のコンバインドサイクルプラントで
は、ガスタービン等の排ガス源が部分負荷となった場
合、排ガスボイラ蒸発量も変化し、中圧や低圧の蒸発量
を任意に制御することができない。すなわち、排ガスボ
イラの蒸発量はガスタービン等の排ガス条件と、蒸発タ
ービンの入口圧力により決定され、自らの蒸発量制御が
できなかった。2. Description of the Related Art In a conventional combined cycle plant, when the exhaust gas source such as a gas turbine is partially loaded, the evaporation amount of the exhaust gas boiler also changes, and the evaporation amount at medium pressure or low pressure cannot be controlled arbitrarily. That is, the evaporation amount of the exhaust gas boiler is determined by the exhaust gas conditions of the gas turbine and the inlet pressure of the evaporation turbine, and the evaporation amount cannot be controlled by itself.
【０００３】[0003]
【発明が解決しようとする課題】従来、排ガスボイラの
蒸発量はガスタービン等の負荷（排ガス条件）に左右さ
れ、部分負荷における蒸発量を任意に制御することがで
きず、成り行きの蒸発量しか得られなかった。したがっ
て、中圧または低圧の蒸気系から、脱気器加熱蒸気やガ
スタービン冷却蒸気、その他の補助蒸気を外部へ供給す
る場合、その需要に応じた任意の蒸発量を得ることがで
きなかった。Conventionally, the amount of evaporation of an exhaust gas boiler depends on the load (exhaust gas condition) of a gas turbine or the like, and the amount of evaporation at a partial load cannot be arbitrarily controlled. I couldn't get it. Therefore, when the deaerator heating steam, the gas turbine cooling steam, or other auxiliary steam is supplied to the outside from the medium-pressure or low-pressure steam system, it is not possible to obtain an arbitrary evaporation amount according to the demand.
【０００４】[0004]
【課題を解決するための手段】本発明者は、前記従来の
課題を解決するために、コンバインドサイクルプラント
の排ガスボイラにおいて、中圧蒸発器の入口よりも上流
から高温排ガスの一部を取出し上記中圧蒸発器の入口に
再導入するバイパスダクトと、同バイパスダクトに設け
られたダンパとを備えたことを特徴とする排ガスボイラ
の蒸発量制御装置；ならびにコンバインドサイクルプラ
ントの排ガスボイラにおいて、低圧蒸発器の入口よりも
上流から高温排ガスの一部を取出し上記低圧蒸発器の入
口に再導入するバイパスダクトと、同バイパスダクトに
設けられたダンパとを備えたことを特徴とする排ガスボ
イラの蒸発量制御装置を提案するものである。In order to solve the above-mentioned conventional problems, the present inventor took out a part of the high temperature exhaust gas from the upstream of the inlet of the medium pressure evaporator in the exhaust gas boiler of the combined cycle plant. An evaporation control device for an exhaust gas boiler, comprising a bypass duct re-introduced to the inlet of the medium-pressure evaporator and a damper provided in the bypass duct; and an exhaust gas boiler of a combined cycle plant for low-pressure evaporation. Evaporation amount of the exhaust gas boiler, comprising a bypass duct for extracting a part of the high-temperature exhaust gas from the upstream of the inlet of the reactor and reintroducing it into the inlet of the low-pressure evaporator, and a damper provided in the bypass duct. A control device is proposed.
【０００５】[0005]
【作用】本発明においては、中圧蒸発器または低圧蒸発
器よりも上流で高温排ガスの一部を取出し、バイパスダ
クトを経て中圧蒸発器または低圧蒸発器の入口へ再導入
し混合するとともに、そのバイパス量をダンパで制御す
ることにより、中圧蒸発器または低圧蒸発器の入口排ガ
ス温度を任意に上昇させることができる。その結果、中
圧蒸発器または低圧蒸発器における熱回収量が多くな
り、中圧蒸発量または低圧蒸発量の増加制御が可能とな
る。In the present invention, a part of the high temperature exhaust gas is taken out upstream of the medium pressure evaporator or the low pressure evaporator, re-introduced into the inlet of the medium pressure evaporator or the low pressure evaporator through the bypass duct, and mixed. By controlling the bypass amount with the damper, the temperature of the exhaust gas at the inlet of the medium-pressure evaporator or the low-pressure evaporator can be arbitrarily increased. As a result, the amount of heat recovered in the medium-pressure evaporator or the low-pressure evaporator increases, making it possible to control the increase of the medium-pressure evaporation amount or the low-pressure evaporation amount.
【０００６】また、排ガスバイパス状態を定格状態とし
ておけば一定蒸発量制御も可能となる。Further, if the exhaust gas bypass state is set to the rated state, it is possible to control the constant evaporation amount.
【０００７】[0007]
【実施例】図１は本発明の第１実施例を示す系統図であ
る。この実施例は、ガスタービン・蒸気タービンコンバ
インドサイクルプラントにおいて、排ガスボイラの中圧
蒸気をガスタービン冷却蒸気に用い、その中圧蒸気の蒸
発量を制御する場合の例である。1 is a system diagram showing a first embodiment of the present invention. This embodiment is an example in which, in a gas turbine / steam turbine combined cycle plant, medium pressure steam of an exhaust gas boiler is used as gas turbine cooling steam and the evaporation amount of the medium pressure steam is controlled.
【０００８】図１中（１）は発電機，（２）は低圧ター
ビン，（３）は中圧タービン，（４）は高圧タービン，
（５）はガスタービン，（６）はガスタービン被冷却
部，（７）は復水器，（８）は排ガスボイラ，（９Ａ）
は排ガスバイパスダクト，（10Ａ）は排ガスバイパスダ
ンパ，（１１）は高圧過熱器，（１２）は再熱器，（１
３）は高圧ドラム，（１４）は高圧蒸発器，（１５）は
高圧二次節炭器，（１６）は中圧過熱器，（１７）は低
圧過熱器，（１８）は中圧ドラム，（１９）は中圧蒸発
器，（２０）は中圧節炭器，（２１）は高圧一次節炭
器，（２２）は低圧ドラム，（２３）は低圧蒸発器，
（２４）は低圧節炭器，（２５）は復水ポンプ，（２
６）は低圧節炭器再循環ポンプ，（２７）は中圧給水ポ
ンプ，（２８）は高圧給水ポンプをそれぞれ示す。In FIG. 1, (1) is a generator, (2) is a low pressure turbine, (3) is a medium pressure turbine, and (4) is a high pressure turbine.
(5) is a gas turbine, (6) is a gas turbine cooled part, (7) is a condenser, (8) is an exhaust gas boiler, (9A)
Is an exhaust gas bypass duct, (10A) is an exhaust gas bypass damper, (11) is a high pressure superheater, (12) is a reheater, (1
3) is a high pressure drum, (14) is a high pressure evaporator, (15) is a high pressure secondary economizer, (16) is a medium pressure superheater, (17) is a low pressure superheater, (18) is a medium pressure drum, ( 19) is a medium pressure evaporator, (20) is a medium pressure economizer, (21) is a high pressure primary economizer, (22) is a low pressure drum, (23) is a low pressure evaporator,
(24) is a low pressure economizer, (25) is a condensate pump, (2
6) is a low pressure economizer recirculation pump, (27) is a medium pressure feed pump, and (28) is a high pressure feed pump.
【０００９】本実施例では、高圧蒸発器（１４）の入口
（すなわち中圧蒸発器（１９）の入口よりも上流）で高
温排ガスの一部を取出し上記中圧蒸発器（１９）の入口
に再導入する排ガスバイパスダクト（９Ａ）が設けら
れ、その排ガスバイパスダクト（９Ａ）には排ガスバイ
パスダンパ（10Ａ）が設けられている。In the present embodiment, a part of the high temperature exhaust gas is taken out at the inlet of the high pressure evaporator (14) (that is, upstream of the inlet of the intermediate pressure evaporator (19)) and is fed to the inlet of the intermediate pressure evaporator (19). An exhaust gas bypass duct (9A) to be reintroduced is provided, and the exhaust gas bypass duct (9A) is provided with an exhaust gas bypass damper (10A).
【００１０】定格負荷時で、中圧蒸発量が十分に得られ
ガスタービン冷却蒸気の必要蒸気量を満たしている場合
は、排ガスバイパスダクト（９Ａ）に設置されている排
ガスバイパスダンパ（10Ａ）は閉じている。部分負荷時
において、中圧蒸発量が必要蒸発量に満たない場合に
は、排ガスバイパスダンパ（10Ａ）を開いて高温ガスを
導入することにより、中圧蒸発器（１９）の入口排ガス
温度を上昇させ、中圧蒸発器（１９）における熱回収を
増加させる。その結果、中圧蒸発量が増加し、必要蒸発
量が確保される。At the rated load, when the medium pressure evaporation amount is sufficiently obtained and the required steam amount of the gas turbine cooling steam is satisfied, the exhaust gas bypass damper (10A) installed in the exhaust gas bypass duct (9A) is It's closed. When the medium pressure evaporation amount is less than the required evaporation amount at the time of partial load, the exhaust gas bypass damper (10A) is opened to introduce high temperature gas, and the exhaust gas temperature at the inlet of the intermediate pressure evaporator (19) is increased. To increase heat recovery in the medium pressure evaporator (19). As a result, the medium pressure evaporation amount increases, and the required evaporation amount is secured.
【００１１】次に図２は本発明の第２実施例を示す系統
図である。この実施例は、脱気器加熱蒸気その他のニー
ズによる補助蒸気として利用する低圧蒸気の蒸発量を制
御する例である。図２において、前記図１により説明し
た第１実施例と同様の部分については、冗長になるのを
避けるため、同一の符号を付け詳しい説明を省く。Next, FIG. 2 is a system diagram showing a second embodiment of the present invention. This embodiment is an example of controlling the evaporation amount of low-pressure steam used as auxiliary steam according to other needs such as deaerator heating steam. In FIG. 2, the same parts as those of the first embodiment described with reference to FIG. 1 are designated by the same reference numerals to avoid redundancy, and detailed description thereof is omitted.
【００１２】本実施例においては、高圧蒸発器（１４）
の入口（すなわち低圧蒸発器（２３）の入口よりも上
流）で高温排ガスの一部を取出し上記低圧蒸発器（２
３）の入口に再導入する排ガスバイパスダクト（９Ｂ）
が設けられ、その排ガスバイパスダクト（９Ｂ）に排ガ
スバイパスダンパ（10Ｂ）が設けられている。In the present embodiment, the high pressure evaporator (14)
Part of the hot exhaust gas is taken out at the inlet of the low pressure evaporator (2) (that is, upstream of the inlet of the low pressure evaporator (23)).
Exhaust gas bypass duct (9B) reintroduced to the inlet of 3)
The exhaust gas bypass duct (9B) is provided with the exhaust gas bypass damper (10B).
【００１３】定格負荷時で、低圧蒸発量が十分に得られ
脱気器加熱蒸気等の必要蒸気量を満たしている場合は、
排ガスバイパスダクト（９Ｂ）に設置されている排ガス
バイパスダンパ（10Ｂ）は閉じている。部分負荷時にお
いて、低圧蒸発量が必要蒸発量に満たない場合には、排
ガスバイパスダンパ（10Ｂ）を開いて高温ガスを導入す
ることにより、低圧蒸発器（２３）の入口排ガス温度を
上昇させ、低圧蒸発器（２３）における熱回収を増加さ
せる。その結果、中圧蒸発量が増加し、必要蒸発量が確
保される。At the rated load, when the low-pressure evaporation amount is sufficiently obtained and the required steam amount such as the deaerator heating steam is satisfied,
The exhaust gas bypass damper (10B) installed in the exhaust gas bypass duct (9B) is closed. When the low-pressure evaporation amount is less than the required evaporation amount at the time of partial load, the exhaust gas bypass damper (10B) is opened to introduce high-temperature gas to raise the exhaust gas temperature at the inlet of the low-pressure evaporator (23), Increases heat recovery in the low pressure evaporator (23). As a result, the medium pressure evaporation amount increases, and the required evaporation amount is secured.
【００１４】[0014]
【発明の効果】コンバインドサイクルプラントにおい
て、部分負荷時に排ガスボイラの中圧蒸発量または低圧
蒸発量が減り、ガスタービン冷却蒸気、脱気器加熱蒸
気、その他の補助蒸気の必要蒸気量が得られなくなるよ
うな場合でも、本発明によれば中圧蒸発量もしくは低圧
蒸発量を増加させ、必要量の蒸気を発生させることがで
きる。EFFECTS OF THE INVENTION In a combined cycle plant, the amount of medium or low pressure evaporation of an exhaust gas boiler is reduced during partial load, and the required amount of steam for gas turbine cooling steam, deaerator heating steam, and other auxiliary steam cannot be obtained. Even in such a case, according to the present invention, it is possible to increase the amount of medium-pressure evaporation or the amount of low-pressure evaporation to generate the required amount of steam.
【図１】図１は本発明の一実施例を示す系統図である。FIG. 1 is a system diagram showing an embodiment of the present invention.
【図２】図２は本発明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 present invention.
（１） 発電機 （２） 低圧タービン （３） 中圧タービン （４） 高圧タービン （５） ガスタービン （６） ガスタービン被冷却部 （７） 復水器 （８） 排ガスボイラ （９Ａ），（９Ｂ） 排ガスバイパスダクト （10Ａ），（10Ｂ） 排ガスバイパスダンパ （１１） 高圧過熱器 （１２） 再熱器 （１３） 高圧ドラム （１４） 高圧蒸発器 （１５） 高圧二次節炭器 （１６） 中圧過熱器 （１７） 低圧過熱器 （１８） 中圧ドラム （１９） 中圧蒸発器 （２０） 中圧節炭器 （２１） 高圧一次節炭器 （２２） 低圧ドラム （２３） 低圧蒸発器 （２４） 低圧節炭器 （２５） 復水ポンプ （２６） 低圧節炭器再循環ポンプ （２７） 中圧給水ポンプ （２８） 高圧給水ポンプ (1) Generator (2) Low pressure turbine (3) Medium pressure turbine (4) High pressure turbine (5) Gas turbine (6) Gas turbine cooled part (7) Condenser (8) Exhaust gas boiler (9A), ( 9B) Exhaust gas bypass duct (10A), (10B) Exhaust gas bypass damper (11) High pressure superheater (12) Reheater (13) High pressure drum (14) High pressure evaporator (15) High pressure secondary coal economizer (16) Inside Pressure superheater (17) Low pressure superheater (18) Medium pressure drum (19) Medium pressure evaporator (20) Medium pressure economizer (21) High pressure primary economizer (22) Low pressure drum (23) Low pressure evaporator ( 24) Low pressure economizer (25) Condensate pump (26) Low pressure economizer recirculation pump (27) Medium pressure water supply pump (28) High pressure water supply pump
Claims (2)
ボイラにおいて、中圧蒸発器の入口よりも上流から高温
排ガスの一部を取出し上記中圧蒸発器の入口に再導入す
るバイパスダクトと、同バイパスダクトに設けられたダ
ンパとを備えたことを特徴とする排ガスボイラの蒸発量
制御装置。1. In an exhaust gas boiler of a combined cycle plant, a bypass duct for extracting a part of high-temperature exhaust gas from an upstream side of an inlet of an intermediate pressure evaporator and reintroducing it to the inlet of the intermediate pressure evaporator, and the bypass duct. An exhaust gas boiler evaporation amount control device, comprising:
ボイラにおいて、低圧蒸発器の入口よりも上流から高温
排ガスの一部を取出し上記低圧蒸発器の入口に再導入す
るバイパスダクトと、同バイパスダクトに設けられたダ
ンパとを備えたことを特徴とする排ガスボイラの蒸発量
制御装置。2. In an exhaust gas boiler of a combined cycle plant, a bypass duct for extracting a part of high temperature exhaust gas from an upstream side of an inlet of a low pressure evaporator and re-introducing it to the inlet of the low pressure evaporator, and the bypass duct. An evaporation amount control device for an exhaust gas boiler, comprising: a damper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19659294A JPH0861012A (en) | 1994-08-22 | 1994-08-22 | Evaporation amount control device for exhaust gas boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19659294A JPH0861012A (en) | 1994-08-22 | 1994-08-22 | Evaporation amount control device for exhaust gas boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0861012A true JPH0861012A (en) | 1996-03-05 |
Family
ID=16360308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19659294A Withdrawn JPH0861012A (en) | 1994-08-22 | 1994-08-22 | Evaporation amount control device for exhaust gas boiler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0861012A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0939203A1 (en) * | 1996-11-29 | 1999-09-01 | Mitsubishi Heavy Industries, Ltd. | Steam cooled gas turbine system |
| FR2981687A1 (en) * | 2011-10-21 | 2013-04-26 | Gen Electric | SYSTEM AND DEVICE FOR CONTROLLING TEMPERATURE IN HEAT RECOVERY VAPOR GENERATOR |
| CN104704205A (en) * | 2012-09-27 | 2015-06-10 | 西门子公司 | Gas and steam turbine system having feed-water partial-flow degasser |
-
1994
- 1994-08-22 JP JP19659294A patent/JPH0861012A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0939203A1 (en) * | 1996-11-29 | 1999-09-01 | Mitsubishi Heavy Industries, Ltd. | Steam cooled gas turbine system |
| FR2981687A1 (en) * | 2011-10-21 | 2013-04-26 | Gen Electric | SYSTEM AND DEVICE FOR CONTROLLING TEMPERATURE IN HEAT RECOVERY VAPOR GENERATOR |
| US9074494B2 (en) | 2011-10-21 | 2015-07-07 | General Electric Company | System and apparatus for controlling temperature in a heat recovery steam generator |
| CN104704205A (en) * | 2012-09-27 | 2015-06-10 | 西门子公司 | Gas and steam turbine system having feed-water partial-flow degasser |
| CN104704205B (en) * | 2012-09-27 | 2016-11-02 | 西门子公司 | There is combustion gas and the steam turbine installation of feedwater shunting depassing unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20011106 |