JPS5939122Y2 - combined plant - Google Patents
combined plantInfo
- Publication number
- JPS5939122Y2 JPS5939122Y2 JP8615477U JP8615477U JPS5939122Y2 JP S5939122 Y2 JPS5939122 Y2 JP S5939122Y2 JP 8615477 U JP8615477 U JP 8615477U JP 8615477 U JP8615477 U JP 8615477U JP S5939122 Y2 JPS5939122 Y2 JP S5939122Y2
- Authority
- JP
- Japan
- Prior art keywords
- steam
- deaerator
- feed water
- low pressure
- pressure regulator
- 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
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- Engine Equipment That Uses Special Cycles (AREA)
Description
【考案の詳細な説明】
本案は、ガスタービン、蒸気タービン、排熱回収ボイラ
より構成されるコンバインドサイクル発電プラントにお
ける、ガスタービン蒸気噴射系統の制御方式に関する。[Detailed Description of the Invention] The present invention relates to a control method for a gas turbine steam injection system in a combined cycle power plant that includes a gas turbine, a steam turbine, and an exhaust heat recovery boiler.
第１図に、従来技術によるコンバインドサイクルプラン
トでのガスタービン蒸気噴射系統を示す。FIG. 1 shows a gas turbine steam injection system in a conventional combined cycle plant.
ガスタービン１０は圧縮機１１と燃焼器１２とタービン
１３により構成されていて、発電機１４を駆動する。The gas turbine 10 includes a compressor 11, a combustor 12, and a turbine 13, and drives a generator 14.
排熱回収ボイラ２０は、ガスの上流側より過熱器２１．
蒸発器２２、節炭器２４より構成されている。The exhaust heat recovery boiler 20 includes a superheater 21.
It is composed of an evaporator 22 and a energy saver 24.
上記蒸発器２２と上記節炭器２４との間には、蒸気噴射
用ボイラ２３が設置されている。A steam injection boiler 23 is installed between the evaporator 22 and the economizer 24 .
上記蒸気噴射用ボイラ２３には、蒸気噴射用蒸気管４１
が接続されていて、上記蒸気管４１は上記ガスタービン
１０の燃焼器１２に連結されている。The steam injection boiler 23 includes a steam pipe 41 for steam injection.
The steam pipe 41 is connected to the combustor 12 of the gas turbine 10.
上記蒸気管４１の燃焼器１２へ連絡される上流側に、蒸
気噴射量調整弁１５が設置されている。A steam injection amount adjustment valve 15 is installed on the upstream side of the steam pipe 41 that communicates with the combustor 12 .
又、蒸気タービンプラント３０は蒸気タービン３１、復
水器３２、復水ポンプ３７、低圧ヒータ３３、脱気器３
４．ドレンポンプ３６によって構成され、発電機３８を
駆動する。The steam turbine plant 30 also includes a steam turbine 31, a condenser 32, a condensate pump 37, a low pressure heater 33, and a deaerator 3.
4. It is composed of a drain pump 36 and drives a generator 38.
上記排熱回収ボイラ２０の加熱器２１と上記蒸気タービ
ン３１は主蒸気管４２で連結されている。The heater 21 of the exhaust heat recovery boiler 20 and the steam turbine 31 are connected by a main steam pipe 42.
また上記蒸気タービン３１の中間部と上記脱気器３４．
上記低圧ヒータ３３は抽気管３９Ａ、３９Ｂで連結され
、それぞれの上流側に抽気逆止弁４０Ａ、４０Ｂが設置
されている。Also, the intermediate portion of the steam turbine 31 and the deaerator 34.
The low-pressure heaters 33 are connected by bleed pipes 39A and 39B, and bleed check valves 40A and 40B are installed on the upstream side of each.
上記蒸気タービン３１．復水器３２、低圧ヒータ３３．
脱気器３４．排熱回収ボイラの節炭器２４は、復水管８
．給水管４３で連結され、上記脱気器３４と上記節炭器
２４の上流側に給水ポンプ３５が設置されている。The steam turbine 31. Condenser 32, low pressure heater 33.
Deaerator 34. The energy saver 24 of the exhaust heat recovery boiler is connected to the condensate pipe 8
．． A water supply pump 35 is installed upstream of the deaerator 34 and the energy saver 24, which are connected by a water supply pipe 43.
大気４は上記空気圧縮機１１によって圧縮され燃焼器１
２に於いて燃料９を燃焼させ、高温ガス２を発生し上記
タービン１３に注入し、上記発電機１４を駆動させてい
る。Atmosphere 4 is compressed by the air compressor 11 and sent to the combustor 1.
At step 2, fuel 9 is combusted to generate high-temperature gas 2, which is injected into the turbine 13 to drive the generator 14.
上記ガスタービン１３よりの排ガス３は約５２０℃の温
度で排熱回収ボイラ２０に注入される。The exhaust gas 3 from the gas turbine 13 is injected into the exhaust heat recovery boiler 20 at a temperature of about 520°C.
上記排熱回収ボイラ２０では、給水４３が給水され上記
節炭器２４．蒸発器２２．過熱器２１を通過する内に、
上記排ガス３の熱を回収し、５６気圧、４５５’Ｃの高
温高圧の蒸気７となり、蒸気タービン３１−・注入され
、発電機３８を駆動する。In the exhaust heat recovery boiler 20, the water supply 43 is supplied to the energy saver 24. Evaporator 22. While passing through the superheater 21,
The heat of the exhaust gas 3 is recovered and becomes high-temperature, high-pressure steam 7 of 56 atmospheres and 455'C, which is injected into the steam turbine 31 and drives the generator 38.
上記蒸気タービンの中間より、蒸気は上記抽気管３９Ａ
、３９Ｂを通じ脱気器３４．低圧ヒータ３３の熱源とな
っている。Steam flows from the middle of the steam turbine to the bleed pipe 39A.
, 39B through the deaerator 34. It serves as a heat source for the low pressure heater 33.
一方、上記蒸気噴射用蒸気ボイラ２３に給水４３が通じ
、熱回収し、１８気圧飽和蒸気５を発生する。On the other hand, feed water 43 passes through the steam boiler 23 for steam injection, recovers heat, and generates 18-atmosphere saturated steam 5.
上記飽和蒸気５は、上記ガスタービン１０の蒸気噴射用
蒸気流巽調整弁１５によって流量調整されて、上記燃焼
器１２に注入し、ガスタービン１０より排出されるＮＯ
ｘの低減に使用されている。The flow rate of the saturated steam 5 is adjusted by the steam injection steam flow regulating valve 15 of the gas turbine 10, and the NO is injected into the combustor 12.
It is used to reduce x.
コンバインドプラント用のガスタービンの蒸気噴射は、
効率効上のためＳ／Ｉボイラ（高圧の主蒸気系統とは別
の単独ボイラ）を設置するが、ガスタービンの部分負荷
時において、Ｓ／■に必要な蒸気はと発生蒸気巽の間に
過剰の蒸気が発生する場合がある。Steam injection for gas turbines for combined plants is
For efficiency, an S/I boiler (an independent boiler separate from the high-pressure main steam system) is installed, but when the gas turbine is under partial load, the steam required for S/ Excess steam may be generated.
これを利用する必要がある。上記の従来技術の欠点を解
消し、ガスタービン蒸気噴射系統の部分負荷での余剰蒸
気の有効利用をはかったコンバインドプラントの提供に
ある。You need to take advantage of this. It is an object of the present invention to provide a combined plant that eliminates the drawbacks of the above-mentioned prior art and that effectively utilizes surplus steam under partial load of a gas turbine steam injection system.
上記目的の為に、上記ガスタービン蒸気噴射系統の部分
負荷での余剰蒸気を、コンバインドプラントの脱気器、
低圧給水加熱器、復水器の優先順位に回収させた。For the above purpose, surplus steam at partial load of the gas turbine steam injection system is transferred to the deaerator of the combined plant,
Low-pressure feedwater heaters and condensers were prioritized for recovery.
第２図に本案による蒸気噴射系統の実施例を示す。FIG. 2 shows an embodiment of the steam injection system according to the present invention.
ガスタービン１０は圧縮機１１と燃焼器１２とタービン
１３により構成されていて、発電機１４を駆動する。The gas turbine 10 includes a compressor 11, a combustor 12, and a turbine 13, and drives a generator 14.
排熱回収ボイラ２０は、ガスの上流側より過熱器２１．
蒸発器２２２節炭器２４より構成されている。The exhaust heat recovery boiler 20 includes a superheater 21.
It is composed of an evaporator 222 and a economizer 24.
上記蒸気器２２と上記節炭器２４との間には、蒸気噴射
用ボイラ２３が設置されてＬ・る。A steam injection boiler 23 is installed between the steamer 22 and the economizer 24.
上記蒸気噴射用ボイラ２３には、蒸気噴射用蒸気管４１
が接続されていて、上記蒸気管４１は上記ガスタービン
１０の燃焼器１２に連結されている。The steam injection boiler 23 includes a steam pipe 41 for steam injection.
The steam pipe 41 is connected to the combustor 12 of the gas turbine 10.
上記蒸気管４１の燃焼器１２へ連絡される上流側に、蒸
気噴射量調整弁１５が設置されている。A steam injection amount adjustment valve 15 is installed on the upstream side of the steam pipe 41 that communicates with the combustor 12 .
又、蒸気タービンプラント３０は蒸気タービン３１、復
水器３２．復水ポンプ３７．低圧ヒータ３３、脱気器３
４．ドレンポンプ３６によって構成され、発電機３８を
駆動する。Further, the steam turbine plant 30 includes a steam turbine 31, a condenser 32 . Condensate pump 37. Low pressure heater 33, deaerator 3
4. It is composed of a drain pump 36 and drives a generator 38.
上記排熱回収ボイラ２０の加熱器２１と上記蒸気タービ
ン３１は主蒸気管４２で連結されている。The heater 21 of the exhaust heat recovery boiler 20 and the steam turbine 31 are connected by a main steam pipe 42.
また上記蒸気タービン３１の中間部と上記脱気器３４．
上記低圧ヒータ３３は抽気管３９Ａ、３９Ｂで連結され
、それぞれの上流側に抽気逆止弁４０Ａ、４０Ｂが設置
されている。Also, the intermediate portion of the steam turbine 31 and the deaerator 34.
The low-pressure heaters 33 are connected by bleed pipes 39A and 39B, and bleed check valves 40A and 40B are installed on the upstream side of each.
上記蒸気タービン３１．復水器３２、低圧ヒータ３３．
脱気器３４．排熱回収ボイラの節炭器２４は、復水管８
．給水管４３で連結され、上記脱気器３４と上記節炭器
２４の上流側に給水ポンプ３５が設置されている。The steam turbine 31. Condenser 32, low pressure heater 33.
Deaerator 34. The energy saver 24 of the exhaust heat recovery boiler is connected to the condensate pipe 8
．． A water supply pump 35 is installed upstream of the deaerator 34 and the energy saver 24, which are connected by a water supply pipe 43.
上記蒸気噴射用ボイラ２３に連結されている上記噴射用
蒸気管４１より余剰蒸気回収管６１が分岐されており、
上記余剰蒸気回収管６１より同時に分岐管６２，６３．
６４が分岐され、各々脱気器３４．低圧給水ヒータ３３
．復水器３２に連結されている。An excess steam recovery pipe 61 is branched from the injection steam pipe 41 connected to the steam injection boiler 23,
Branch pipes 62, 63 simultaneously from the surplus steam recovery pipe 61.
64 are branched, each having a deaerator 34. Low pressure water heater 33
．． It is connected to a condenser 32.
上記分岐管６２，６３．６４には、各々流量調整弁５３
，５５，５８が設置されている。Each of the branch pipes 62, 63, and 64 has a flow rate regulating valve 53.
, 55, and 58 are installed.
父上配流＃調整弁５３．５５．５８の上流側には圧力調
整器５１，５４，５７がそれぞれ設置されており、上記
脱気器３４．低圧給水力ｐ熱器３３には、圧力調整器５
２，５６が、それぞれ設置されている。Pressure regulators 51, 54, and 57 are installed on the upstream side of the father distribution #regulating valves 53, 55, and 58, respectively, and the deaerators 34. The low pressure water supply power p heater 33 includes a pressure regulator 5.
2,56 are installed respectively.
大気４は上記空気圧縮機１１によって圧縮され燃焼器１
２に於いて燃料９を燃焼させ、高温ガス２を発生しに記
タービン１３に注入し、上記発電機１４を駆動させてい
る。Atmosphere 4 is compressed by the air compressor 11 and sent to the combustor 1.
At step 2, the fuel 9 is combusted to generate high-temperature gas 2, which is injected into the turbine 13 to drive the generator 14.
上記ガスタービン１３よりの排ガス３は約５２０℃の温
度で排熱回収ボイラ２０に注入される。The exhaust gas 3 from the gas turbine 13 is injected into the exhaust heat recovery boiler 20 at a temperature of about 520°C.
上記排熱回収ボイラ２０では、給水４３が給水され上記
節炭器２４．蒸発器２２．過熱器２１を通過する内に、
上記排ガス３の熱を回収し、５６気圧、４５５℃の高温
高圧の蒸気７となり、蒸気タービン３１へ注入され、発
電機３８を駆動する。In the exhaust heat recovery boiler 20, the water supply 43 is supplied to the energy saver 24. Evaporator 22. While passing through the superheater 21,
The heat of the exhaust gas 3 is recovered and turned into high-temperature, high-pressure steam 7 at 56 atmospheres and 455° C., which is injected into the steam turbine 31 and drives the generator 38 .
上記蒸気タービンの中間より、蒸気は上記抽気管３９Ａ
、３９Ｂを通じ脱気器３４．低圧ヒータ３３の熱源とな
っている。Steam flows from the middle of the steam turbine to the bleed pipe 39A.
, 39B through the deaerator 34. It serves as a heat source for the low pressure heater 33.
一方、上記蒸気噴射用蒸気ボイラ２３に給水４３が通じ
、熱回収し、１８気圧飽和蒸気５を発生する。On the other hand, feed water 43 passes through the steam boiler 23 for steam injection, recovers heat, and generates 18-atmosphere saturated steam 5.
上記飽和蒸気５は、上記ガスタービン１０の蒸気噴射用
蒸気流巽調整弁１５によって流量調整されて、上記燃焼
器１２に注入し、ガスタ−ビン１０より排出されるＮＯ
ｘの低減に使用されている。The flow rate of the saturated steam 5 is adjusted by a steam flow rate regulating valve 15 for steam injection of the gas turbine 10, and the NO is injected into the combustor 12.
It is used to reduce x.
一般にこの蒸気系統は１８気圧に調整されているが、蒸
気噴射量との間に過剰蒸気６が発生した場合にはこの系
統の圧力が１８気圧をこえてくる。Generally, this steam system is adjusted to 18 atmospheres, but if excess steam 6 is generated between the amount of steam injection and the amount of steam injection, the pressure of this system will exceed 18 atmospheres.
この場合、上記圧力調整器５１は例えば１８気圧に設定
されており、この場合この設定値に調整するため上記流
量調整弁５３を開け、余剰蒸気を上記脱気器３４に流入
させる。In this case, the pressure regulator 51 is set to, for example, 18 atmospheres, and in this case, in order to adjust to this set value, the flow rate regulating valve 53 is opened to allow excess steam to flow into the deaerator 34.
又、上記圧力調整器５２は例えばＭＤＦ時の圧力２，０
５気圧に設定されており上記脱気器３４がＭＤＦ時の圧
力２，０５気圧を超えないように上記流量調整弁５３を
閉める。Further, the pressure regulator 52 is configured to adjust the pressure of MDF to 2.0, for example.
The pressure is set at 5 atm, and the flow rate regulating valve 53 is closed so that the deaerator 34 does not exceed the pressure of 2.05 atm during MDF.
又、上記圧力調整器５４は例えば１８．５気圧に設定さ
れており、この系統の圧力が１８，５気圧をこえてくる
ときに、この設定値に調整するため上記流量調整弁５５
を開げ、余剰蒸気を上記低圧ヒータ３３に流入させる。The pressure regulator 54 is set to, for example, 18.5 atmospheres, and when the pressure in this system exceeds 18.5 atmospheres, the flow rate adjustment valve 55 is activated to adjust to this set value.
is opened to allow excess steam to flow into the low pressure heater 33.
又、上記圧力調整器５６は０，４３気圧に設定されてお
り上記低圧ヒータ３３が０．４３気圧をこえないように
上記流量調整弁５５を閉める。Further, the pressure regulator 56 is set at 0.43 atmospheres, and the flow rate adjustment valve 55 is closed so that the low pressure heater 33 does not exceed 0.43 atmospheres.
さらに上記圧力調整器５７は例えば１９．０気圧に設定
されており、この系統の圧力が１９．０気圧をこえてく
るときに、この設定値に調整するため上記流量調整弁５
８を開げ、この系統の圧力が１９．０をこえないように
最終的に余剰蒸気を上記復水器３２へ流入させる。Further, the pressure regulator 57 is set to, for example, 19.0 atm, and when the pressure in this system exceeds 19.0 atm, the flow rate regulating valve 57 is set to adjust to this set value.
8 is opened, and surplus steam is finally allowed to flow into the condenser 32 so that the pressure in this system does not exceed 19.0.
このように部分負荷時に上記余剰蒸気６が発生した場合
に、上記脱気器３４．低圧ヒータ３３゜復水器３２の優
先順位で上記余剰蒸気６の有効利用をはかる。In this way, when the surplus steam 6 is generated during partial load, the deaerator 34. Effective use of the surplus steam 6 is achieved by prioritizing the low pressure heater 33 and the condenser 32.
図−２に示される本案の実施例の効果は下記である。The effects of the embodiment of the present invention shown in Figure 2 are as follows.
■）余剰蒸気による圧力上昇がおさえられるので、設計
圧力が低くなり配管の肉厚がうすくですむ。■) Since the pressure rise due to excess steam is suppressed, the design pressure is lower and the wall thickness of the piping can be reduced.
２）余剰蒸気を脱気器、低圧給水ヒータの加熱に回収す
るためプラント熱効率が向上する。2) Plant thermal efficiency is improved because excess steam is recovered to heat the deaerator and low-pressure feed water heater.
３）脱気器、低圧給水ヒータ、復水器の優先順位で余剰
蒸気を回収するため、熱効率がより一層向上する。3) Thermal efficiency is further improved because surplus steam is recovered in priority order from the deaerator, low-pressure feedwater heater, and condenser.
４）余剰蒸気の回収においても、脱気器、低圧給水ヒー
タの内圧がその設計圧力をこえないように制御し２てい
る。4) Even in the recovery of excess steam, the internal pressure of the deaerator and low-pressure water heater is controlled so as not to exceed its design pressure.
第１図は、従来技術によるガスタービン−蒸気タービン
コンバインドサイクルプラントの蒸気噴射系統図、第２
図は、本案による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の蒸気噴射系統図である。
１・・−空気、２・・・高温ガス、３・・・排ガス、４
・・・大気、５・・・飽和蒸気、６・・・過剰蒸気、７
・・・高温高圧蒸気、８・・・復水。FIG. 1 is a steam injection system diagram of a gas turbine-steam turbine combined cycle plant according to the prior art;
The figure is a steam injection system diagram of a gas turbine steam turbine combined cycle plant according to the present invention. 1...-Air, 2...High temperature gas, 3...Exhaust gas, 4
...Atmosphere, 5...Saturated steam, 6...Excess steam, 7
... High temperature and high pressure steam, 8... Condensate.
Claims (1)
、脱気器と、蒸気噴射ボイラな持つ排熱回収ボイラと、
上記蒸気噴射ボイラよりの発生蒸気の上記ガスタービン
への蒸気導入管より構成されるコンバインドプラントに
於て、上記蒸気導入管と上記脱気器、低圧給水加熱器、
復水器とを各連結管により連絡し、上記の各連結管に、
各流量調整弁を設置し、上記の各流量調整弁の上流側に
圧力調整器を設置し、さらに、上記脱気器、低圧給水加
熱器に圧力調整器を設置し、上記脱気器への連結管上の
流量調整弁を、上記脱気器への連結管上の圧力調整器と
、上記脱気器上の圧力調整器によって調整せしめ、上記
低圧給水加熱器への連結管上の流量調整弁を、上記低圧
給水加熱器への連結管上の圧力調整器と、上記低圧給水
加熱器上の圧力調整器によって調整せしめ、上記復水器
への連結管上の流量調整弁を、上記復水器への連結管上
の圧力調整器によって調整せしめることを特徴とする蒸
気噴射系統を備えたコンバインプラント。Gas turbines, steam turbines, condensers, low pressure feed water heaters, deaerators, and exhaust heat recovery boilers such as steam injection boilers,
In a combined plant comprising a steam introduction pipe for the steam generated from the steam injection boiler to the gas turbine, the steam introduction pipe, the deaerator, the low pressure feed water heater,
Connect the condenser with each connecting pipe, and connect each of the above connecting pipes with
Each flow rate adjustment valve is installed, a pressure regulator is installed upstream of each of the above flow rate adjustment valves, and a pressure regulator is installed at the above deaerator and low pressure feed water heater, and a pressure regulator is installed at the above deaerator and low pressure feed water heater. A flow rate regulating valve on the connecting pipe is adjusted by a pressure regulator on the connecting pipe to the deaerator and a pressure regulator on the deaerator, and a flow rate regulating valve on the connecting pipe to the low pressure feed water heater is adjusted. A valve is regulated by a pressure regulator on a connecting pipe to the low pressure feed water heater and a pressure regulator on the low pressure feed water heater, and a flow regulating valve on the connecting pipe to the condenser is adjusted by a pressure regulator on the connecting pipe to the low pressure feed water heater. A combination plant equipped with a steam injection system, characterized in that the pressure is regulated by a pressure regulator on a connecting pipe to a water dispenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8615477U JPS5939122Y2 (en) | 1977-07-01 | 1977-07-01 | combined plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8615477U JPS5939122Y2 (en) | 1977-07-01 | 1977-07-01 | combined plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5415640U JPS5415640U (en) | 1979-02-01 |
| JPS5939122Y2 true JPS5939122Y2 (en) | 1984-10-31 |
Family
ID=29010468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8615477U Expired JPS5939122Y2 (en) | 1977-07-01 | 1977-07-01 | combined plant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5939122Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3707089B2 (en) * | 1994-12-26 | 2005-10-19 | 石川島播磨重工業株式会社 | Plant control system in an exhaust-fired combined cycle plant |
-
1977
- 1977-07-01 JP JP8615477U patent/JPS5939122Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5415640U (en) | 1979-02-01 |
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