JPH11159305A - Pressurized fluidized bed combined generating plant - Google Patents
Pressurized fluidized bed combined generating plantInfo
- Publication number
- JPH11159305A JPH11159305A JP32262997A JP32262997A JPH11159305A JP H11159305 A JPH11159305 A JP H11159305A JP 32262997 A JP32262997 A JP 32262997A JP 32262997 A JP32262997 A JP 32262997A JP H11159305 A JPH11159305 A JP H11159305A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- pressurized fluidized
- fluidized bed
- water
- heat exchanger
- 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.)
- Granted
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
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は加圧流動床複合発電
プラントの改良に係わり、特に加圧流動床ボイラとガス
タービンと蒸気タービンとを備えている加圧流動床複合
発電プラントに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved pressurized fluidized bed combined cycle power plant, and more particularly to a pressurized fluidized bed combined cycle power plant including a pressurized fluidized bed boiler, a gas turbine and a steam turbine. .
【０００２】[0002]
【従来の技術】従来一般に採用されているこの種の加圧
流動床複合発電プラントは、図８にその概略系統が示さ
れているように、復水ポンプ１２と脱気器１７の間に低
圧給水加熱器１４，排ガス・灰クーラ３０および排カス
熱交換器６が並列に設置され、そして低圧給水加熱器１
４，排ガス・灰クーラ３０および排カス熱交換器６の給
水量は、その入口または出口に設けられている流量調節
弁により制御され、また、脱気器１７への給水は、復水
ポンプ１２出口に設置された脱気器水位調節弁１３によ
り制御されるようになっているのが普通である。2. Description of the Related Art This type of pressurized fluidized bed combined cycle power plant, which has been generally employed, has a low pressure between a condensate pump 12 and a deaerator 17 as shown in FIG. The feed water heater 14, the exhaust gas / ash cooler 30, and the waste heat exchanger 6 are installed in parallel, and the low pressure feed water heater 1
4. The amount of water supplied to the exhaust gas / ash cooler 30 and the waste heat exchanger 6 is controlled by a flow control valve provided at an inlet or an outlet thereof. Usually, it is controlled by a deaerator water level control valve 13 installed at the outlet.
【０００３】なお、この種加圧流動床複合発電プラント
に関連するものとしては、例えば特開平６−１８５７０
４号公報が挙げられる。[0003] Japanese Patent Application Laid-Open No. 6-18570 relates to this type of pressurized fluidized bed combined cycle power plant.
No. 4 gazette.
【０００４】[0004]
【発明が解決しようとする課題】このように形成されて
いる加圧流動床複合発電プラントであると、プラントの
緊急停止時において、給水量を急速に減少させると脱気
器水位調節弁１３の応答遅れ、脱気器１７内の蒸気凝縮
および脱気器内給水の落水により脱気器水位が上昇し脱
気器水位調節弁１３が脱気器水位計１８から信号により
全閉となり脱気器１７への給水が停止される。With the pressurized fluidized bed combined cycle power plant formed as described above, when the amount of water supply is rapidly reduced during an emergency stop of the plant, the deaerator water level control valve The response delay, the condensation of steam in the deaerator 17 and the fall of the supply water in the deaerator raise the deaerator water level, and the deaerator water level control valve 13 is fully closed by a signal from the deaerator water level gauge 18 to be fully closed. Water supply to 17 is stopped.
【０００５】一方、排ガス・灰クーラ３０および排ガス
熱交換器６は、ガス側および灰側からの入熱により給水
が加熱され、このため排ガス・灰クーラ３０および排カ
ス熱交換器６廻りの給水がフラッシュ（水⇒蒸気）し、
排ガス・灰クーラ３０および排カス熱交換器６などの機
器および配管弁を損傷することが容易に推定される。On the other hand, the feed water of the exhaust gas / ash cooler 30 and the exhaust gas heat exchanger 6 is heated by the heat input from the gas side and the ash side. Flash (water ⇒ steam)
Damage to equipment such as the exhaust gas / ash cooler 30 and the exhaust gas heat exchanger 6 and piping valves is easily estimated.
【０００６】またプラント起動停止時に少量の給水をボ
イラへ供給すると脱気器水位調節弁１３の連続制御が不
可能となり脱気器１７への給水が停止（ＯＮ−ＯＦＦ制
御）される可能性があり緊急停止時と同様の事象が発生
することが考えられる。なお、前述した特開平６−１８
５７０４号公報に記載のものでは、緊急停止時および起
動停止時における配慮に欠け、ガス側および灰側からの
入熱による排ガス・灰クーラ３０および排カス熱交換器
６廻りの給水フラッシュを防止することは不可能であっ
た。Further, if a small amount of water is supplied to the boiler at the time of starting and stopping the plant, continuous control of the deaerator water level control valve 13 becomes impossible, and the water supply to the deaerator 17 may be stopped (ON-OFF control). There is a possibility that the same event as in emergency stop occurs. Incidentally, the above-mentioned Japanese Patent Application Laid-Open No. 6-18 / 1994
Japanese Patent No. 5704 does not take into account the emergency stop and start-up stop, and prevents the flush of the exhaust gas / ash cooler 30 and the waste gas heat exchanger 6 due to heat input from the gas side and the ash side. That was impossible.
【０００７】本発明はこれに鑑みなされたもので、その
目的とするところは、プラントの起動停止時および緊急
停止時に排ガス熱交換器廻りで発生するフラッシュを充
分防止し、安定運転の確保，機器保護および信頼性の向
上を図ることが可能なこの種の加圧流動床複合発電プラ
ントを提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the foregoing, and it is an object of the present invention to sufficiently prevent a flash generated around an exhaust gas heat exchanger at the time of starting and stopping of a plant and an emergency stop, to ensure stable operation, and to secure equipment. It is an object of the present invention to provide a pressurized fluidized bed combined cycle power plant of this type capable of improving protection and reliability.
【０００８】[0008]
【課題を解決するための手段】すなわち本発明は、蒸気
を発生させる加圧流動床ボイラと、この加圧流動床ボイ
ラで発生した蒸気により駆動される蒸気タービンと、前
記加圧流動床ボイラからの排ガスにより駆動されるガス
タービンと、前記蒸気タービンの復水器から前記加圧流
動床ボイラへ給水する給水系統を備え、前記給水系統
に、給水を加熱する排ガス熱交換器，給水加熱器および
脱気器が設けられている加圧流動床複合発電プラントに
おいて、前記給水系統に、前記脱気器にて生じた排ガス
熱交換器の置換水を、前記排ガス熱交換器へ供給する置
換水供給系統を設け、またこの系統に、ポンプおよび流
量を調整する調整弁を設けるようになし所期の目的を達
成するようにしたものである。That is, the present invention provides a pressurized fluidized bed boiler for generating steam, a steam turbine driven by the steam generated by the pressurized fluidized bed boiler, and a pressurized fluidized bed boiler. A gas turbine driven by exhaust gas from the steam turbine, and a water supply system for supplying water from the condenser of the steam turbine to the pressurized fluidized-bed boiler. In the pressurized fluidized bed combined cycle power plant provided with a deaerator, replacement water supply for supplying the water supply system with replacement water for the exhaust gas heat exchanger generated in the deaerator to the exhaust gas heat exchanger. A system is provided, and a pump and a regulating valve for adjusting a flow rate are provided in the system to achieve an intended purpose.
【０００９】また本発明は、蒸気を発生させる加圧流動
床ボイラと、この加圧流動床ボイラで発生した蒸気によ
り駆動される蒸気タービンと、前記加圧流動床ボイラか
らの排ガスにより駆動されるガスタービンと、前記蒸気
タービンの復水器から前記加圧流動床ボイラへ給水する
給水系統を備え、前記給水系統に、給水を加熱する排ガ
ス熱交換器，給水加熱器および脱気器が設けられている
加圧流動床複合発電プラントにおいて、前記給水系統
に、前記排ガス熱交換器の出口側の給水を前記復水器へ
供給する給水循環系統を設けるようにしたものである。Further, the present invention provides a pressurized fluidized bed boiler for generating steam, a steam turbine driven by steam generated by the pressurized fluidized bed boiler, and driven by exhaust gas from the pressurized fluidized bed boiler. A gas turbine, and a water supply system for supplying water from a condenser of the steam turbine to the pressurized fluidized bed boiler, wherein the water supply system is provided with an exhaust gas heat exchanger, a feedwater heater, and a deaerator for heating feedwater. In the combined pressurized fluidized-bed power plant, the feedwater system is provided with a feedwater circulation system that supplies feedwater on the outlet side of the exhaust gas heat exchanger to the condenser.
【００１０】またこの場合、前記給水循環系統に、緊急
停止時および起動停止時に排ガス熱交換器出口から復水
器への置換水を規定量に制御する調節弁，流量計および
温度計を設けるようにしたものである。In this case, the water supply circulation system is provided with a control valve, a flow meter, and a thermometer for controlling the replacement water from the exhaust gas heat exchanger outlet to the condenser to a specified amount at the time of emergency stop and start-up stop. It was made.
【００１１】また本発明は、蒸気を発生させる加圧流動
床ボイラと、この加圧流動床ボイラで発生した蒸気によ
り駆動される蒸気タービンと、前記加圧流動床ボイラか
らの排ガスにより駆動されるガスタービンと、前記蒸気
タービンの復水器から前記加圧流動床ボイラへ給水する
給水系統を備え、前記給水系統に、給水を加熱する排ガ
ス熱交換器，給水加熱器および脱気器が設けられている
加圧流動床複合発電プラントにおいて、前記給水系統
に、緊急停止または起動停止時に前記脱気器の水位制御
装置からの信号により脱気器レベル調節弁を介して前記
排ガス熱交換器へ置換水を供給する置換水供給系統を設
けるとともに、この置換水供給系統に、供給置換水量を
規定量に制御する調節弁を設けるようにしたものであ
る。The present invention also provides a pressurized fluidized bed boiler for generating steam, a steam turbine driven by steam generated by the pressurized fluidized bed boiler, and driven by exhaust gas from the pressurized fluidized bed boiler. A gas turbine, and a water supply system for supplying water from a condenser of the steam turbine to the pressurized fluidized bed boiler, wherein the water supply system is provided with an exhaust gas heat exchanger, a feedwater heater, and a deaerator for heating feedwater. In the pressurized fluidized bed combined cycle power plant, the water supply system is replaced with the exhaust gas heat exchanger via a deaerator level control valve by a signal from a water level control device of the deaerator at an emergency stop or start-up stop. A replacement water supply system for supplying water is provided, and a control valve for controlling the supply replacement water amount to a specified amount is provided in the replacement water supply system.
【００１２】また、蒸気を発生させる加圧流動床ボイラ
と、この加圧流動床ボイラで発生した蒸気により駆動さ
れる蒸気タービンと、前記加圧流動床ボイラからの排ガ
スにより駆動されるガスタービンと、前記蒸気タービン
の復水器から前記加圧流動床ボイラへ給水する給水系統
を備え、前記給水系統に、給水を加熱する排ガス熱交換
器，給水加熱器および脱気器が設けられている加圧流動
床複合発電プラントにおいて、前記給水系統に、緊急停
止時および起動停止時に排ガス・灰クーラ出口から排ガ
ス熱交換器への置換水を供給する置換水供給系統を設け
るとともに、この置換水供給系統に、供給置換水量を規
定量に制御するため調節弁および流量計を設けるように
したものである。A pressurized fluidized bed boiler for generating steam, a steam turbine driven by steam generated by the pressurized fluidized bed boiler, and a gas turbine driven by exhaust gas from the pressurized fluidized bed boiler. A water supply system for supplying water from the condenser of the steam turbine to the pressurized fluidized bed boiler, wherein the water supply system is provided with an exhaust gas heat exchanger, a feed water heater, and a deaerator for heating the feed water. In the pressurized fluidized bed combined cycle power plant, the water supply system is provided with a replacement water supply system for supplying replacement water from the exhaust gas / ash cooler outlet to the exhaust gas heat exchanger at the time of emergency stop and start-up stop. In addition, a control valve and a flow meter are provided to control the supply replacement water amount to a specified amount.
【００１３】すなわちこのように形成された加圧流動床
複合発電プラントであると、排ガス熱交換器内の給水を
置換するため脱気器の給水を脱気器出口から排ガス熱交
換器へ供給するための供給系統が設けられていることか
ら、緊急停止時および起動停止時に脱気器水位調節弁が
全閉した場合であっても、脱気器の給水を脱気器から排
ガス熱交換器入口管へ供給することが可能となり、ガス
側および灰側からの入熱による排ガス熱交換器廻りの温
度上昇を緩和することができ安定した運転状態を確保す
ることが可能となるのである。That is, in the pressurized fluidized bed combined cycle power plant formed as described above, feed water of the deaerator is supplied from the deaerator outlet to the exhaust gas heat exchanger to replace the feed water in the exhaust gas heat exchanger. Even if the deaerator water level control valve is fully closed at the time of emergency stop and start-up stop, the water supply to the deaerator from the deaerator to the exhaust gas heat exchanger inlet This makes it possible to supply the heat to the pipes, so that the temperature rise around the exhaust gas heat exchanger due to heat input from the gas side and the ash side can be reduced, and a stable operation state can be secured.
【００１４】また、排ガス熱交換器の給水を置換するた
め、排ガス・灰クーラ出口の給水を排ガス・灰クーラ出
口管から排ガス熱交換器へ供給するための系統が設けら
れていることから、緊急停止時および起動停止時に脱気
器水位調節弁が全閉した場合でも排ガス・灰クーラ出口
の給水を排ガス・灰クーラ出口管から排ガス熱交換器へ
供給することが可能となるため、ガス側および灰側から
の入熱による排ガス熱交換器廻りの温度上昇を緩和する
ことがき安定した運転状態を確保することが可能とな
る。In addition, since a system for supplying water from the exhaust gas / ash cooler outlet from the exhaust gas / ash cooler outlet pipe to the exhaust gas heat exchanger is provided to replace the water supply to the exhaust gas heat exchanger, Even when the deaerator water level control valve is fully closed at the time of stoppage and start-up stop, water at the exhaust gas / ash cooler outlet can be supplied from the exhaust gas / ash cooler outlet pipe to the exhaust gas heat exchanger, The temperature rise around the exhaust gas heat exchanger due to heat input from the ash side can be reduced, and a stable operation state can be secured.
【００１５】また、排ガス熱交換器出口の給水を復水器
へ供給するための系統が設けられていることから、緊急
停止時および起動停止時に少量の給水を加圧流動床ボイ
ラへ供給する場合でも排ガス熱交換器出口の給水を復水
器へ供給することにより、脱気器水位調節弁の通水量が
増加するため脱気器水位調節弁の連続制御が可能性とな
る。このため、排ガス熱交換器の給水量が増加し、ガス
側および灰側からの入熱による排ガス熱交換器廻りの温
度上昇を緩和することができ安定した運転状態を確保す
ることが可能となる。Further, since a system for supplying the feed water at the outlet of the exhaust gas heat exchanger to the condenser is provided, a small amount of feed water is supplied to the pressurized fluidized-bed boiler at the time of emergency stop and start-up stop. However, by supplying the feedwater at the outlet of the exhaust gas heat exchanger to the condenser, the flow rate of the deaerator water level control valve increases, so that the deaerator water level control valve can be continuously controlled. For this reason, the amount of water supplied to the exhaust gas heat exchanger increases, and the temperature rise around the exhaust gas heat exchanger due to heat input from the gas side and the ash side can be reduced, and a stable operation state can be secured. .
【００１６】またもう一つの発明は、脱気器水位調節弁
の制御を脱気器水位装置（給水流量、給水ダンプ流量、
脱気器水位と緊急停止モード）からの信号等により先行
制御し排ガス熱交換器への給水を復水ポンプ出口より供
給したもので、これにより、緊急停止時および起動停止
時に少量の給水をボイラへ供給すると場合でも復水ポン
プ出口の給水を脱気器水位調節弁を介し排ガス熱交換器
へ給水することが可能となるため、ガス側および灰側か
らの入熱による排ガス熱交換器廻りの温度上昇を緩和す
ることがき安定した運転状態を確保することが可能とな
る。In another aspect of the present invention, the control of the deaerator water level control valve is performed by a deaerator water level device (water supply flow rate, water supply dump flow rate,
Water supply to the exhaust gas heat exchanger is supplied from the condensate pump outlet by pre-control based on signals from the deaerator water level and emergency stop mode). Even if it is supplied to the exhaust gas heat exchanger, it is possible to supply the water at the outlet of the condensate pump to the exhaust gas heat exchanger via the deaerator water level control valve. The temperature rise can be reduced, and a stable operation state can be secured.
【００１７】また、本発明は、給水循環ポンプ出口の配
管部に、給水量を調節するための給水循環ポンプ出口流
量計と給水循環ポンプ出口流量調節弁が設けられている
ことから、緊急停止時および起動停止時の脱気器から排
ガス熱交換器への給水量を規定値に調節することが可能
となり、ガス側および灰側からの入熱による排ガス熱交
換器廻りの温度上昇を緩和することがき安定した運転状
態を確保することが可能となる。Further, the present invention provides a water supply circulation pump outlet flow meter for adjusting the water supply amount and a water supply circulation pump outlet flow rate control valve in the piping section of the water supply circulation pump outlet, so that the emergency stop is possible. In addition, it is possible to adjust the amount of water supplied from the deaerator to the exhaust gas heat exchanger during startup and shutdown to a specified value, and to mitigate the temperature rise around the exhaust gas heat exchanger due to heat input from the gas side and ash side. It becomes possible to secure a stable operating state.
【００１８】また、排ガス熱交換器出口から復水器への
給水量を調節するための給水ダンプ流量計、給水ダンプ
流量調節弁、脱気器圧力計、復水ダンプ流量計、および
排ガス熱交換器温度計が設けられていることから、緊急
停止時および起動停止時に少量の給水をボイラへ供給す
ると場合でも排ガス熱交換器出口の給水を復水器へ供給
することにより、脱気器水位調節弁の通水量が増加する
ため脱気器水位調節弁の連続制御が可能性となる。この
ため、排ガス熱交換器の給水量が増加し、ガス側および
灰側からの入熱による排ガス熱交換器廻りの温度上昇を
緩和することがき安定した運転状態を確保することが可
能となるのである。Also, a feed water dump flow meter, a feed water dump flow control valve, a deaerator pressure gauge, a condensate dump flow meter, and an exhaust gas heat exchange for adjusting the amount of water supplied from the exhaust gas heat exchanger outlet to the condenser. Even if a small amount of water is supplied to the boiler at the time of emergency stop and start-up stop, the deaerator water level is adjusted by supplying the water at the outlet of the exhaust gas heat exchanger to the condenser due to the provision of a heater thermometer. Since the flow rate of the valve increases, continuous control of the deaerator water level control valve becomes possible. For this reason, the amount of water supplied to the exhaust gas heat exchanger increases, and the temperature rise around the exhaust gas heat exchanger due to heat input from the gas side and the ash side can be reduced, and a stable operation state can be secured. is there.
【００１９】[0019]
【発明の実施の形態】以下図示した実施例に基づいて本
発明を詳細に説明する。図１にはその加圧流動床複合発
電プラントの系統が示されている。図中４がガスタービ
ンであり、１がガスタービン圧縮機、２が加圧流動床ボ
イラ、８が高圧蒸気タービン、９が再熱蒸気タービンで
ある。なお、５はガスタービン発電機であり、１０は蒸
気タービン発電機、７は排ガス用の煙突である。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. FIG. 1 shows a system of the pressurized fluidized bed combined cycle power plant. In the figure, 4 is a gas turbine, 1 is a gas turbine compressor, 2 is a pressurized fluidized-bed boiler, 8 is a high-pressure steam turbine, and 9 is a reheat steam turbine. 5 is a gas turbine generator, 10 is a steam turbine generator, and 7 is a chimney for exhaust gas.
【００２０】まず、この図に示されているように、ガス
タービン圧縮機１に導入された空気は、高圧空気となっ
て加圧流動床ボイラ２へ導入される。そしてこの導入さ
れた高圧空気は、加圧流動床ボイラ内で燃料供給系統３
から供給される燃料とともに燃焼し、高温・高圧の燃料
ガスとなり、ガスタービン４にて膨張し仕事をする。ガ
スタービン４はガスタービン発電機５を回転させ電気出
力を得る。その後、この仕事を終えたガスタービン排ガ
スは、排ガス熱交換器６で給水と熱交換し、やがて煙突
７より大気へ放出される。First, as shown in this figure, the air introduced into the gas turbine compressor 1 becomes high-pressure air and is introduced into the pressurized fluidized bed boiler 2. Then, the introduced high-pressure air is supplied to the fuel supply system 3 in the pressurized fluidized-bed boiler.
The fuel gas is burned together with the fuel supplied from the gas turbine, becomes high-temperature and high-pressure fuel gas, expands in the gas turbine 4, and performs work. The gas turbine 4 rotates a gas turbine generator 5 to obtain an electric output. Thereafter, the gas turbine exhaust gas that has completed this work exchanges heat with feed water in an exhaust gas heat exchanger 6 and is eventually released from the chimney 7 to the atmosphere.
【００２１】一方、加圧流動床ボイラ２に供給された高
温給水は、加圧流動床ボイラ２で加熱され高温高圧蒸気
となって高圧蒸気タービン８へ送られ高圧蒸気タービン
８を回転駆動させる。さらに膨張した低圧蒸気は、再び
加圧流動床ボイラ２で熱回収が行なわれ、高温蒸気とな
り再熱蒸気タービン９に送られ再熱蒸気タービン９を回
転駆動する。これら蒸気タービン８，９は、蒸気タービ
ン発電機１０を駆動し、電気出力を得る。On the other hand, the high-temperature feed water supplied to the pressurized fluidized-bed boiler 2 is heated by the pressurized fluidized-bed boiler 2 to become high-temperature and high-pressure steam, which is sent to the high-pressure steam turbine 8 to rotate the high-pressure steam turbine 8. Further, the expanded low-pressure steam is subjected to heat recovery in the pressurized fluidized-bed boiler 2 again, becomes high-temperature steam, and is sent to the reheat steam turbine 9 to rotate and drive the reheat steam turbine 9. These steam turbines 8 and 9 drive a steam turbine generator 10 to obtain an electric output.
【００２２】再熱蒸気タービン９で仕事をした蒸気は、
低温低圧蒸気となって復水器１１で海水と熱交換され、
凝縮して復水となり復水器１１内に貯められる。復水器
１１内に貯められた復水は、復水器１１出口に設置され
た復水ポンプ１２にて昇圧されて低圧給水加熱器１４お
よび排ガス熱交換器６へ給水され、蒸気タービン抽気４
３およびガスタービンからの排ガスと熱交換を行う。The steam that has worked in the reheat steam turbine 9 is:
It becomes low-temperature low-pressure steam and heat exchanges with seawater in the condenser 11,
The condensed water is condensed and stored in the condenser 11. The condensate stored in the condenser 11 is pressurized by a condensate pump 12 installed at the outlet of the condenser 11 and supplied to the low-pressure feed water heater 14 and the exhaust gas heat exchanger 6, and the steam turbine bleed 4
3 and heat exchange with the exhaust gas from the gas turbine.
【００２３】その後この給水は、脱気器１７に導かれて
脱気される。脱気された給水はさらに給水ポンプ２０に
て昇圧されて高圧給水加熱器２２へ給水され、その後、
加圧流動床ボイラ２へ高温給水として給水される。Thereafter, the feed water is guided to a deaerator 17 and deaerated. The degassed water is further pressurized by the water supply pump 20 and supplied to the high-pressure water heater 22, and thereafter,
Water is supplied to the pressurized fluidized-bed boiler 2 as high-temperature water supply.
【００２４】なおこの系統で、緊急停止時においては、
加圧流動床ボイラ２内の加熱管を高温高圧ガスから保護
するために、少量の給水を供給しクーリング蒸気を加熱
管へ供給する必要があり、復水ポンプ１２出口の脱気器
水位調節弁１３にて脱気器１７水位を調節し、かつ給水
ポンプ２０の回転数、または給水流量調節弁２１にて給
水流量を制御するようにしている。In this system, during an emergency stop,
In order to protect the heating pipe in the pressurized fluidized-bed boiler 2 from high-temperature and high-pressure gas, it is necessary to supply a small amount of water and supply cooling steam to the heating pipe, and a deaerator water level control valve at the outlet of the condensing pump 12. At 13, the water level of the deaerator 17 is adjusted, and the number of rotations of the water supply pump 20 or the water supply flow rate is controlled by the water supply flow rate control valve 21.
【００２５】また、起動停止時においても、加圧流動床
ボイラ２へ少量の給水を復水ポンプ１２出口の脱気器水
位調節弁１３にて脱気器１７水位を調節し、かつ給水ポ
ンプ２０の回転数、または給水流量調節弁２１にて給水
流量を制御するようにしている。Also, at the time of starting and stopping, a small amount of water is supplied to the pressurized fluidized-bed boiler 2 by controlling the water level of the deaerator 17 by the deaerator water level control valve 13 at the outlet of the condensing pump 12 and the water supply pump 20. Or the supply water flow rate is controlled by the supply water flow control valve 21.
【００２６】本発明はこのような加圧流動複合発電プラ
ントにおいて、排ガス熱交換器６内の給水を置換するた
め脱気器１７の給水を脱気器１７から排ガス熱交換器６
入口管へ供給するための置換水供給系統，すなわちポン
プ２４および配管弁２６を設けたことである。According to the present invention, in such a pressurized fluidized-flow combined cycle power plant, in order to replace the water supply in the exhaust gas heat exchanger 6, the water supplied from the deaerator 17 is supplied from the deaerator 17 to the exhaust gas heat exchanger 6.
That is, a replacement water supply system for supplying to the inlet pipe, that is, a pump 24 and a piping valve 26 are provided.
【００２７】これにより、緊急停止時は給水量を急速に
減少させると脱気器水位調節弁１３の応答遅れ、脱気器
１７内の蒸気凝縮および脱気器１７内給水の落水により
脱気器１７水位が上昇し脱気器水位調節弁１３が脱気器
水位計１８からの信号により全閉となり脱気器１７への
給水が停止された場合でも脱気器１７の給水を脱気器１
７出口から給水循環ポンプ２４へ供給し、昇圧した後給
水循環ポンプ出口流量計２５、給水循環ポンプ出口流量
調節弁２６、排ガス熱交換器６入口管、排ガス熱交換器
６、脱気器１７へ循環することが可能となり、ガス側お
よび灰側からの入熱による排ガス熱交換器６廻りの温度
上昇を緩和することが可能となるのである。With this arrangement, if the amount of water supply is rapidly reduced during an emergency stop, the response of the deaerator water level control valve 13 is delayed, the steam in the deaerator 17 is condensed, and the supply water in the deaerator 17 is dropped. Even when the water level of the deaerator 17 rises and the deaerator water level control valve 13 is fully closed by a signal from the deaerator water level gauge 18 and the supply of water to the deaerator 17 is stopped, the deaerator 1 supplies water to the deaerator 17.
The water is supplied from the outlet 7 to the feed water circulation pump 24, and after the pressure is increased, the feed water circulation pump outlet flow meter 25, the feed water circulation pump outlet flow control valve 26, the exhaust gas heat exchanger 6 inlet pipe, the exhaust gas heat exchanger 6, and the deaerator 17 are provided. It is possible to circulate, and the temperature rise around the exhaust gas heat exchanger 6 due to the heat input from the gas side and the ash side can be reduced.
【００２８】特に給水循環ポンプ出口流量計２５からの
信号により給水循環ポンプ出口流量調節弁２６を制御す
ることができるため安定した運転状態を確保することが
可能となるのである。In particular, since the feed water circulation pump outlet flow rate control valve 26 can be controlled by a signal from the water supply circulation pump outlet flow meter 25, a stable operation state can be ensured.
【００２９】また、起動停止時は少量の給水を加圧流動
床ボイラ２へ給水する必要があり、脱気器水位計１８か
らの信号により脱気器水位調節弁１３が ON-OFF 動作に
なると考えられるが、前記の運転を行うことにより、ガ
ス側および灰側からの入熱による排ガス熱交換器６廻り
の温度上昇を緩和することが可能となる。At the time of starting and stopping, it is necessary to supply a small amount of water to the pressurized fluidized-bed boiler 2. When a signal from the deaerator water level gauge 18 turns on the deaerator water level control valve 13, the valve is turned on and off. It is conceivable that by performing the above-described operation, it is possible to reduce a temperature rise around the exhaust gas heat exchanger 6 due to heat input from the gas side and the ash side.
【００３０】図２は、本発明のもう一つの実施例を示す
もので、脱気器１７の給水を排ガス・灰クーラ３０から
排ガス熱交換器６の入口管へ供給するための置換水供給
系統を設けたものである。すなわち、脱気器内１７の給
水は、高温冷却水タンク水位調節弁２７を介して高温冷
却水タンク２８へ供給され、高温冷却水タンク２８へ供
給された給水（高温冷却水）は、高温冷却水ポンプ２９
で昇圧し、排ガス・灰クーラ３０にて熱交換後冷却水圧
力調節弁３１を介し高温冷却水タンク２８へ戻され、排
ガス・灰クーラ３０の交換熱量は、高温冷却水タンク２
８内でフラッシュし、高温冷却水タンク圧力調節弁３２
を介し低圧給水加熱器１４へ回収される。FIG. 2 shows another embodiment of the present invention. A replacement water supply system for supplying water of a deaerator 17 from an exhaust gas / ash cooler 30 to an inlet pipe of an exhaust gas heat exchanger 6. Is provided. That is, the supply water in the deaerator 17 is supplied to the high-temperature cooling water tank 28 via the high-temperature cooling water tank water level control valve 27, and the supply water (high-temperature cooling water) supplied to the high-temperature cooling water tank 28 is Water pump 29
The heat is exchanged by the exhaust gas / ash cooler 30 and returned to the high temperature cooling water tank 28 via the cooling water pressure control valve 31. The exchanged heat of the exhaust gas / ash cooler 30 is
8, flush the high-temperature cooling water tank pressure control valve 32
To the low-pressure feedwater heater 14.
【００３１】この場合、排ガス熱交換器６内の給水を置
換するため脱気器１７の給水を排ガス・灰クーラ３０出
口（または入口）から排ガス熱交換器６入口管へ供給す
るための配管弁が設けられていることから、これによ
り、緊急停止時に給水量を急速に減少させると脱気器水
位調節弁１３の応答遅れ、脱気器１７内の蒸気凝縮およ
び脱気器１７内給水の落水により脱気器１７水位が上昇
し脱気器水位調節弁１３が脱気器水位計１８から信号に
より全閉となり脱気器１７への給水が停止された場合で
も排ガス・灰クーラ出口給水流量調節弁３４を作動させ
ると高温冷却水タンク２８の水位が低下するため脱気器
１７内の給水が高温冷却水タンク水位計３５らの信号に
より高温冷却水タンク水位調節弁２７が作動し脱気器１
７内の給水が高温冷却水タンク２８へ供給される。In this case, a pipe valve for supplying the feed water of the deaerator 17 from the outlet (or inlet) of the exhaust gas / ash cooler 30 to the inlet pipe of the exhaust gas heat exchanger 6 to replace the feed water in the exhaust gas heat exchanger 6. Therefore, if the water supply amount is rapidly reduced during an emergency stop, the response of the deaerator water level control valve 13 is delayed, the steam condenses in the deaerator 17 and the water supply in the deaerator 17 drops. When the water level of the deaerator 17 rises and the deaerator water level control valve 13 is fully closed by a signal from the deaerator water level gauge 18 and the water supply to the deaerator 17 is stopped, the flow rate of the exhaust gas / ash cooler outlet water supply is adjusted When the valve 34 is actuated, the water level in the high-temperature cooling water tank 28 decreases, so that the water in the deaerator 17 is supplied with a signal from the high-temperature cooling water tank water level meter 35 and the high-temperature cooling water tank water level control valve 27 is operated to deaerator 1
The supply water in 7 is supplied to the high-temperature cooling water tank 28.
【００３２】そして、高温冷却水タンク２８へ供給され
た給水（高温冷却水）は、高温冷却水ポンプ２９で昇圧
され排ガス・灰クーラ３０出口から排ガス・灰クーラ出
口給水流量計３３、排ガス・灰クーラ出口給水流量調節
弁３４、排ガス熱交換器６入口管、排ガス熱交換器６、
脱気器１７へ循環することが可能となり、ガス側および
灰側からの入熱による排ガス熱交換器１７廻りの温度上
昇を緩和することが可能となる。特に排ガス・灰クーラ
出口給水流量計３３からの信号により排ガス・灰クーラ
出口給水流量調節弁３４を制御することができるため安
定した運転状態を確保することが可能となる。The supply water (high-temperature cooling water) supplied to the high-temperature cooling water tank 28 is pressurized by a high-temperature cooling water pump 29 and is supplied from an exhaust gas / ash cooler 30 outlet to an exhaust gas / ash cooler outlet feed water flow meter 33, an exhaust gas / ash Cooler outlet feed water flow control valve 34, exhaust gas heat exchanger 6 inlet pipe, exhaust gas heat exchanger 6,
It is possible to circulate to the deaerator 17 and to alleviate a temperature rise around the exhaust gas heat exchanger 17 due to heat input from the gas side and the ash side. In particular, since the exhaust gas / ash cooler outlet feedwater flow rate control valve 34 can be controlled by a signal from the exhaust gas / ash cooler outlet feedwater flow meter 33, a stable operation state can be ensured.
【００３３】また、起動停止時は少量の給水を加圧流動
床ボイラ２へ給水する必要があり、脱気器水位計１８か
らの信号により脱気器水位調節弁１３が ON-OFF 動作に
なると考えられるが、前記の運転を行うことにより、ガ
ス側および灰側からの入熱による排ガス熱交換器６廻り
の温度上昇を緩和することが可能となる。At the time of starting and stopping, a small amount of water needs to be supplied to the pressurized fluidized-bed boiler 2. When a signal from the deaerator water level gauge 18 turns on the deaerator water level control valve 13, the water is turned on and off. It is conceivable that by performing the above-described operation, it is possible to reduce a temperature rise around the exhaust gas heat exchanger 6 due to heat input from the gas side and the ash side.
【００３４】図３は、さらに本発明の他の実施例を示す
もので、この場合には、排ガス熱交換器６出口の給水を
復水器１１へ供給するための配管および弁を設け、さら
に脱気器水位計１８、脱気器圧力計１９および排ガス熱
交換器出口給水温度計１６および緊急停止モードから構
成される給水タンプ流量制御装置４１からの信号により
給水タンプ流量調節弁３９を制御したことである。FIG. 3 shows still another embodiment of the present invention. In this case, a pipe and a valve for supplying water supplied from the exhaust gas heat exchanger 6 to the condenser 11 are provided. The feed water tamper flow control valve 39 was controlled by a signal from a water tamper flow control device 41 comprising a deaerator water level gauge 18, a deaerator pressure gauge 19, an exhaust gas heat exchanger outlet feed water thermometer 16, and an emergency stop mode. That is.
【００３５】これにより、緊急停止時（燃料系停止、蒸
気タービン停止、ガスタービン停止等）は、給水タンプ
流量制御装置４１からの信号により給水タンプ流量調節
弁３９を制御することにより排ガス熱交換器６出口の給
水を復水器１１へ供給すると復水器１１から排ガス熱交
換器６出口の循環量が増加し、脱気器水位調節弁１３の
通水量が増えるため脱気器水位調節弁１３の連続制御が
可能性となる。このため、排ガス熱交換器６の給水量が
増加し、ガス側および灰側からの入熱による排ガス熱交
換器６廻りの温度上昇を緩和することがき安定した運転
状態を確保することが可能となる。Thus, during an emergency stop (fuel system stop, steam turbine stop, gas turbine stop, etc.), the feed water tamper flow control valve 39 controls the feed water tamper flow control valve 39 to control the exhaust gas heat exchanger. When the supply water at the outlet 6 is supplied to the condenser 11, the amount of circulation from the condenser 11 to the exhaust gas heat exchanger 6 increases, and the amount of water flowing through the deaerator water level control valve 13 increases, so that the deaerator water level control valve 13 Is possible. For this reason, the amount of water supplied to the exhaust gas heat exchanger 6 increases, and the temperature rise around the exhaust gas heat exchanger 6 due to heat input from the gas side and the ash side can be reduced, and a stable operating state can be secured. Become.
【００３６】また、起動停止時に少量の給水を加圧流動
床ボイラ２へ供給する場合でも給水タンプ流量調節弁３
９を制御することにより排ガス熱交換器６出口の給水を
復水器１１へ供給すると復水器１１から排ガス熱交換器
６出口の循環量が増加し排ガス熱交換器６出口の給水を
復水器１１へ供給することにより、脱気器水位調節弁１
３の通水量が増加するため脱気器水位調節弁１３の連続
制御が可能性となる。このため、排ガス熱交換器６の給
水量が増加し、ガス側および灰側からの入熱による排ガ
ス熱交換器６廻りの温度上昇を緩和することがき安定し
た運転状態を確保することが可能となる。Further, even when a small amount of water is supplied to the pressurized fluidized-bed boiler 2 at the time of starting and stopping, the water supply tamping flow control valve 3
When the feed water at the outlet of the exhaust gas heat exchanger 6 is supplied to the condenser 11 by controlling the exhaust gas 9, the circulation amount from the condenser 11 to the outlet of the exhaust gas heat exchanger 6 increases, and the feed water at the outlet of the exhaust gas heat exchanger 6 is condensed. Supply to the deaerator 11, the deaerator water level control valve 1
Since the amount of water flowing in 3 increases, continuous control of the deaerator water level control valve 13 becomes possible. For this reason, the amount of water supplied to the exhaust gas heat exchanger 6 increases, and the temperature rise around the exhaust gas heat exchanger 6 due to heat input from the gas side and the ash side can be reduced, and a stable operating state can be secured. Become.
【００３７】図４は、この実施例の概略制御説明図で、
脱気器圧力計１９、排ガス熱交換器出口給水温度計１６
および緊急停止モードの弁固定値への切替え回路並びに
給水タンプ流量調節弁３９から構成され、脱気器１７内
圧（関数により脱気器内圧を飽和温度に変換）と排ガス
熱交換器出口給水温度の偏差を一定とし比例・積分をお
こない切替えスイッチを介し給水タンプ流量調節弁３９
を制御する。また緊急停止モードの場合は、給水タンプ
流量が一定量（アナログ設定値）になるよう切替スイッ
チを介し給水タンプ流量調節弁３９を制御する。このた
め、起動停止は、排ガス熱交換器出口給水温度を脱気器
１７内圧を飽和温度に以下になるよう制御される。ま
た、緊急停止時は一定量（アナログ設定値）の給水を、
排ガス熱交換器出口から給水タンプ流量調節弁３９を介
し復水器１１に回収することが可能となる。FIG. 4 is a schematic control explanatory diagram of this embodiment.
Deaerator pressure gauge 19, exhaust water heat exchanger outlet feedwater temperature gauge 16
And a switching circuit for switching the valve to a fixed value in the emergency stop mode, and a feed water tamping flow rate control valve 39. The deviation is kept constant, the proportionality and integration are performed, and the feed water tamping flow rate control valve 39 is provided via a changeover switch.
Control. In the case of the emergency stop mode, the water supply tamping flow rate control valve 39 is controlled via a changeover switch so that the water tamping flow rate becomes constant (an analog set value). For this reason, the start and stop are controlled so that the exhaust water heat exchanger outlet feedwater temperature becomes equal to or lower than the internal pressure of the deaerator 17 at the saturation temperature. Also, in case of emergency stop, supply a certain amount of water (analog set value),
It is possible to recover the water from the exhaust gas heat exchanger outlet to the condenser 11 via the feedwater tamping flow control valve 39.
【００３８】図５は、本発明の他の実施例を示す構成図
で、前記実施例（図２）と（図３）を組み合わせ、さら
に復水流量計１５、脱気器水位計１８、給水ダンプ流量
計３８、給水流量計２３および緊急停止モードの信号に
より構成される脱気器水位制御装置４０を設けたことで
ある。FIG. 5 is a block diagram showing another embodiment of the present invention, which is a combination of the above embodiments (FIG. 2) and (FIG. 3), and further includes a condensate flow meter 15, a deaerator water level meter 18, a water supply That is, a deaerator water level control device 40 constituted by a dump flow meter 38, a feed water flow meter 23, and an emergency stop mode signal is provided.
【００３９】これにより、緊急停止時（燃料系停止、蒸
気タービン停止、ガスタービン停止等）は、脱気器水位
制御装置４０からの信号により脱気器水位調節弁１３を
制御することによりクーリング蒸気を発生するに必要な
給水を加圧流動床ボイラ２へ供給することができる。Thus, during an emergency stop (fuel system stop, steam turbine stop, gas turbine stop, etc.), the cooling steam is controlled by controlling the deaerator water level control valve 13 by a signal from the deaerator water level control device 40. Can be supplied to the pressurized fluidized-bed boiler 2.
【００４０】さらに、排ガス熱交換器出口温度が上昇す
ると、排ガス熱交換器６出口の給水を復水器１１へ供給
し復水器１１から排ガス熱交換器６出口の循環量が増加
し、脱気器水位調節弁１３の通水量が増えるため脱気器
水位調節弁１３の連続制御が可能性となる。このため、
排ガス熱交換器６の給水量が増加し、ガス側および灰側
からの入熱による排ガス熱交換器６廻りの温度上昇を緩
和することができ安定した運転状態を確保することが可
能となる。Further, when the temperature of the exhaust gas heat exchanger outlet rises, the water supplied at the outlet of the exhaust gas heat exchanger 6 is supplied to the condenser 11, and the amount of circulation from the condenser 11 to the exhaust gas heat exchanger 6 outlet increases. Since the amount of water flowing through the gas level control valve 13 increases, continuous control of the deaerator level control valve 13 becomes possible. For this reason,
The amount of water supplied to the exhaust gas heat exchanger 6 increases, so that the temperature rise around the exhaust gas heat exchanger 6 due to heat input from the gas side and the ash side can be reduced, and a stable operation state can be secured.
【００４１】また、起動停止時に少量の給水を加圧流動
床ボイラ２へ供給する場合でも給水タンプ流量調節弁３
９を制御することにより排ガス熱交換器６出口の給水を
復水器１１へ供給すると復水器１１から排ガス熱交換器
６出口の循環量が増加し排ガス熱交換器６出口の給水を
復水器１１へ供給することにより、脱気器水位調節弁１
３の通水量が増加するため脱気器水位調節弁１３の連続
制御が可能性となる。このため、排ガス熱交換器６の給
水量が増加し、ガス側および灰側からの入熱による排ガ
ス熱交換器廻りの温度上昇を緩和することができ安定し
た運転状態を確保することが可能となる。Even when a small amount of water is supplied to the pressurized fluidized-bed boiler 2 at the time of starting and stopping, the water supply tamping flow control valve 3
When the feed water at the outlet of the exhaust gas heat exchanger 6 is supplied to the condenser 11 by controlling the exhaust gas 9, the circulation amount from the condenser 11 to the outlet of the exhaust gas heat exchanger 6 increases, and the feed water at the outlet of the exhaust gas heat exchanger 6 is condensed. Supply to the deaerator 11, the deaerator water level control valve 1
Since the amount of water flowing in 3 increases, continuous control of the deaerator water level control valve 13 becomes possible. For this reason, the amount of water supplied to the exhaust gas heat exchanger 6 increases, and the temperature rise around the exhaust gas heat exchanger due to heat input from the gas side and the ash side can be reduced, and a stable operating state can be secured. Become.
【００４２】図６は、前述実施例（図５）の概略制御説
明図である。本実施例は、復水流量計１５、脱気器水位
計１８、給水ダンプ流量計３８、給水流量計２３および
給水ダンプ流量に任意流量設定値を加えかつ最低流量を
確保する様制限された流量設定回路および緊急停止モー
ドの信号にてこの設定回路側へ切替え脱気器水位調節弁
への制御設定値信号とする切替え回路並びに脱気器水位
調節弁１３にて構成され、脱気器１７の出口給水量（給
水流量）と脱気器１７の入口給水量（給水ダンプ流量、
復水流量）により脱気器１７水位を補正し復水流量を脱
気器水位調節弁１３で制御する。また脱気器１７水位が
高くかつ緊急停止モードの場合においても常に給水ダン
プ流量以上の復水流量を確保することが可能となる。FIG. 6 is a schematic control explanatory diagram of the above-described embodiment (FIG. 5). In this embodiment, the condensate flow meter 15, the deaerator water level meter 18, the feed water dump flow meter 38, the feed water flow meter 23, and the flow rate restricted to add an arbitrary flow rate set value to the feed water dump flow rate and secure the minimum flow rate. The deaerator 17 is constituted by a switching circuit for switching to the setting circuit side by a setting circuit and a signal of the emergency stop mode and a switching circuit for setting a control set value signal to the deaerator water level control valve, and a deaerator water level control valve 13. Outlet water supply (water supply flow) and inlet water supply of deaerator 17 (water supply dump flow,
The deaerator 17 water level is corrected by the deaerator 17 and the condensate flow is controlled by the deaerator water level control valve 13. In addition, even in the case where the water level of the deaerator 17 is high and the emergency stop mode is set, it is possible to always secure a condensate flow rate equal to or higher than the feedwater dump flow rate.
【００４３】図７は、他の実施例（図６）の排ガス熱交
換器廻りの流量特性図（緊急停止時モード時）である。
給水タンプ流量が増加すると脱気器入口給水量が一定と
なり排ガス熱交換器６および脱気器水位調節弁１３の通
水量が増加する。また、給水タンプ流量が無くなった場
合は、脱気器水位調節弁１３を介し脱気器１７に少量の
給水が供給される。なお、脱気器１７に供給された給水
は、給水ポンプ２０にて昇圧し加圧流動床ボイラ２に給
水される。FIG. 7 is a flow characteristic diagram (at the time of emergency stop mode) around the exhaust gas heat exchanger of another embodiment (FIG. 6).
When the flow rate of the water supply tamper increases, the water supply amount at the deaerator inlet becomes constant, and the water flow amount of the exhaust gas heat exchanger 6 and the deaerator water level control valve 13 increases. Further, when the water supply tamping flow rate is lost, a small amount of water is supplied to the deaerator 17 via the deaerator water level control valve 13. The water supplied to the deaerator 17 is pressurized by the water supply pump 20 and supplied to the pressurized fluidized-bed boiler 2.
【００４４】以上説明してきたようにこのように形成さ
れた加圧流動床複合発電プラントであると、給水を排ガ
ス熱交換器へ供給するための供給系統が設けられている
ことから、緊急停止時および起動停止時に脱気器水位調
節弁が全閉した場合であっても、排ガス熱交換器部へ給
水が行われ、ガス側および灰側からの入熱による排ガス
熱交換器廻りの温度上昇を緩和することができ安定した
運転状態を確保することができるのである。As described above, the pressurized fluidized bed combined cycle power plant formed as described above is provided with a supply system for supplying feed water to the exhaust gas heat exchanger. Even when the deaerator water level control valve is fully closed at startup and shutdown, water is supplied to the exhaust gas heat exchanger, and the temperature rise around the exhaust gas heat exchanger due to heat input from the gas side and the ash side is reduced. It is possible to relax and secure a stable operation state.
【００４５】[0045]
【発明の効果】以上説明してきたように本発明によれ
ば、プラントの起動停止時および緊急停止時に排ガス熱
交換器廻りで発生するフラッシュを充分防止し、安定運
転の確保，機器保護および信頼性の向上を図ることが可
能なこの種の加圧流動床複合発電プラントを得ることが
できる。As described above, according to the present invention, the flash generated around the exhaust gas heat exchanger at the time of start-up and emergency stop of the plant is sufficiently prevented to ensure stable operation, equipment protection and reliability. This type of pressurized fluidized bed combined cycle power plant capable of improving the fuel cell system can be obtained.
【図１】本発明の加圧流動床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 one embodiment of a combined pressurized fluidized-bed power plant of the present invention.
【図２】本発明の加圧流動床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 a combined pressurized fluidized-bed power plant of the present invention.
【図３】本発明の加圧流動床複合発電プラントの他の実
施例を示す要部系統図である。FIG. 3 is a main part system diagram showing another embodiment of the combined pressurized fluidized-bed power plant of the present invention.
【図４】本発明の加圧流動床複合発電プラントの概略制
御説明図である。FIG. 4 is a schematic control explanatory diagram of the pressurized fluidized bed combined cycle power plant of the present invention.
【図５】本発明の加圧流動床複合発電プラントの他の実
施例を示す要部系統図である。FIG. 5 is a main part system diagram showing another embodiment of the pressurized fluidized bed combined cycle power plant of the present invention.
【図６】本発明の加圧流動床複合発電プラントの概略制
御説明図である。FIG. 6 is a schematic control explanatory diagram of the pressurized fluidized bed combined cycle power plant of the present invention.
【図７】本発明の加圧流動床複合発電プラントの一実施
例における流量特性図（緊急停止モード）である。FIG. 7 is a flow rate characteristic diagram (emergency stop mode) in one embodiment of the combined pressurized fluidized-bed power generation plant of the present invention.
【図８】従来の加圧流動床複合発電プラントの要部系統
図である。FIG. 8 is a main part system diagram of a conventional pressurized fluidized bed combined cycle power plant.
１…ガスタービン圧縮機、２…加圧流動床ボイラ、３…
燃料供給系統、４…ガスタービン、５…ガスタービン発
電機、６…排ガス熱交換器、７…煙突、８…高圧蒸気タ
ービン、９…再熱蒸気タービン、１０…蒸気タービン発
電機、１１…復水器、１２…復水ポンプ、１３…脱気器
水位調節弁、１４…低圧給水加熱器、１５…復水流量
計、１６…排ガス熱交換器出口温度計、１７…脱気器、
１８…脱気器水位計、１９…脱気器圧力計、２０…給水
ポンプ、２１…給水流量調節弁、２２…高圧給水加熱
器、２３…給水流量計、２４…給水循環ポンプ、２５…
給水循環ポンプ出口流量計、２６…給水循環ポンプ出口
流量調節弁、２７…高温冷却水タンク水位調節弁、２８
…高温冷却水タンク、２９…高温冷却水ポンプ、３０…
排ガス・灰クーラ、３１…冷却水圧力調節弁、３２…高
温冷却水タンク圧力調節弁、３３…排ガス・灰クーラ出
口給水流量計、３４…排ガス・灰クーラ出口給水流量調
節弁、３５…高温冷却水タンク水位計、３６…高温冷却
水タンク圧力計、３７…高温冷却水圧力計、３８…給水
タンプ流量計、３９…給水タンプ流量調節弁、４０…脱
気器水位制御装置、４１…給水タンプ流量制御装置、４
２…抽気管、４３…抽気止め弁。1. Gas turbine compressor 2. Pressurized fluidized bed boiler 3.
Fuel supply system, 4 gas turbine, 5 gas turbine generator, 6 exhaust gas heat exchanger, 7 chimney, 8 high-pressure steam turbine, 9 reheat steam turbine, 10 steam turbine generator, 11 recovery Water condenser, 12: condensate pump, 13: deaerator water level control valve, 14: low pressure feed water heater, 15: condensate flow meter, 16: exhaust gas heat exchanger outlet thermometer, 17: deaerator,
18: deaerator water level gauge, 19: deaerator pressure gauge, 20: feed water pump, 21: feed water flow rate control valve, 22: high pressure feed water heater, 23: feed water flow meter, 24: feed water circulation pump, 25 ...
Feed water circulation pump outlet flow meter, 26 ... Feed water circulation pump outlet flow control valve, 27 ... High temperature cooling water tank water level control valve, 28
... High-temperature cooling water tank, 29 ... High-temperature cooling water pump, 30 ...
Exhaust gas / ash cooler, 31 ... Cooling water pressure control valve, 32 ... High temperature cooling water tank pressure control valve, 33 ... Exhaust gas / ash cooler outlet feedwater flow meter, 34 ... Exhaust gas / ash cooler outlet feedwater flow control valve, 35 ... High temperature cooling Water tank water level gauge, 36: high temperature cooling water tank pressure gauge, 37: high temperature cooling water pressure gauge, 38: water supply tamping flow meter, 39: water supply tamping flow rate control valve, 40: deaerator water level control device, 41: water supply tamping Flow control device, 4
2: Bleed pipe, 43: Bleed stop valve.
Claims (6)
この加圧流動床ボイラで発生した蒸気により駆動される
蒸気タービンと、前記加圧流動床ボイラからの燃焼排ガ
スにより駆動されるガスタービンと、前記蒸気タービン
の復水器から前記加圧流動床ボイラへ給水する給水系統
とを備え、前記給水系統に、給水を加熱する排ガス熱交
換器，給水加熱器および脱気器が設けられている加圧流
動床複合発電プラントにおいて、 前記給水系統に、前記脱気器にて生じた排ガス熱交換器
の置換水を、前記排ガス熱交換器へ供給する置換水供給
系統を設けたことを特徴とする加圧流動床複合発電プラ
ント。1. A pressurized fluidized bed boiler for generating steam,
A steam turbine driven by steam generated by the pressurized fluidized bed boiler, a gas turbine driven by combustion exhaust gas from the pressurized fluidized bed boiler, and a pressurized fluidized bed boiler from a steam turbine condenser. A pressurized fluidized bed combined cycle power plant, comprising: an exhaust gas heat exchanger, a feedwater heater, and a deaerator for heating feedwater, wherein the feedwater system comprises: A pressurized fluidized bed combined cycle power plant, comprising: a replacement water supply system for supplying replacement water of an exhaust gas heat exchanger generated by a deaerator to the exhaust gas heat exchanger.
び供給流量を調整する調整弁を備えたものである請求項
１記載の加圧流動床複合発電プラント。2. The pressurized fluidized bed combined cycle power plant according to claim 1, wherein the replacement water supply system includes a supply pump and a regulating valve for regulating a supply flow rate.
この加圧流動床ボイラで発生した蒸気により駆動される
蒸気タービンと、前記加圧流動床ボイラからの燃焼排ガ
スにより駆動されるガスタービンと、前記蒸気タービン
の復水器から前記加圧流動床ボイラへ給水する給水系統
とを備え、前記給水系統に、給水を加熱する排ガス熱交
換器，給水加熱器および脱気器が設けられている加圧流
動床複合発電プラントにおいて、 前記給水系統に、前記排ガス熱交換器の出口側の給水を
前記復水器へ供給する給水循環系統を設けたことを特徴
とする加圧流動床複合発電プラント。3. A pressurized fluidized bed boiler for generating steam,
A steam turbine driven by steam generated by the pressurized fluidized bed boiler, a gas turbine driven by combustion exhaust gas from the pressurized fluidized bed boiler, and a pressurized fluidized bed boiler from a steam turbine condenser. A pressurized fluidized bed combined cycle power plant, comprising: an exhaust gas heat exchanger, a feedwater heater, and a deaerator for heating feedwater, wherein the feedwater system comprises: A pressurized fluidized bed combined cycle power plant, comprising a feedwater circulation system for feeding feedwater on the outlet side of an exhaust gas heat exchanger to the condenser.
起動停止時に排ガス熱交換器出口から復水器への置換水
を規定量に制御する調節弁，流量計および温度計を設け
てなる請求項３記載の加圧流動床複合発電プラント。4. A control valve, a flow meter, and a thermometer for controlling replacement water from an exhaust gas heat exchanger outlet to a condenser to a specified amount at the time of emergency stop and startup stop in the water supply circulation system. Item 4. A combined pressurized fluidized bed power plant according to item 3.
この加圧流動床ボイラで発生した蒸気により駆動される
蒸気タービンと、前記加圧流動床ボイラからの排ガスに
より駆動されるガスタービンと、前記蒸気タービンの復
水器から前記加圧流動床ボイラへ給水する給水系統を備
え、前記給水系統に、給水を加熱する排ガス熱交換器，
給水加熱器および脱気器が設けられている加圧流動床複
合発電プラントにおいて、 前記給水系統に、緊急停止または起動停止時に前記脱気
器の水位制御装置からの信号により脱気器レベル調節弁
を介して前記排ガス熱交換器へ置換水を供給する置換水
供給系統を設けるとともに、この置換水供給系統に、供
給置換水量を規定量に制御する調節弁を設けたことを特
徴とする加圧流動床複合発電プラント。5. A pressurized fluidized bed boiler for generating steam,
A steam turbine driven by steam generated in the pressurized fluidized bed boiler, a gas turbine driven by exhaust gas from the pressurized fluidized bed boiler, and a steam turbine condenser to the pressurized fluidized bed boiler. A water supply system for supplying water, wherein the water supply system is provided with an exhaust gas heat exchanger for heating water supply;
In a pressurized fluidized-bed combined cycle power plant provided with a feedwater heater and a deaerator, the dewatering level control valve is supplied to the water supply system by a signal from a water level control device of the deaerator during an emergency stop or start-up stop. A replacement water supply system for supplying replacement water to the exhaust gas heat exchanger via the control valve, and a control valve for controlling the supply replacement water amount to a specified amount in the replacement water supply system. Fluid bed combined cycle power plant.
この加圧流動床ボイラで発生した蒸気により駆動される
蒸気タービンと、前記加圧流動床ボイラからの排ガスに
より駆動されるガスタービンと、前記蒸気タービンの復
水器から前記加圧流動床ボイラへ給水する給水系統を備
え、前記給水系統に、給水を加熱する排ガス熱交換器，
給水加熱器および脱気器が設けられている加圧流動床複
合発電プラントにおいて、 前記給水系統に、緊急停止時および起動停止時に排ガス
・灰クーラ出口から排ガス熱交換器への置換水を供給す
る置換水供給系統を設けるとともに、この置換水供給系
統に、供給置換水量を規定量に制御するため調節弁およ
び流量計を設けたことを特徴とする加圧流動床複合発電
プラント。6. A pressurized fluidized bed boiler for generating steam,
A steam turbine driven by steam generated in the pressurized fluidized bed boiler, a gas turbine driven by exhaust gas from the pressurized fluidized bed boiler, and a steam turbine condenser to the pressurized fluidized bed boiler. A water supply system for supplying water, wherein the water supply system is provided with an exhaust gas heat exchanger for heating water supply;
In a pressurized fluidized bed combined cycle power plant provided with a feedwater heater and a deaerator, replacement water is supplied from the exhaust gas / ash cooler outlet to the exhaust gas heat exchanger to the water supply system at the time of emergency stop and start-up stop. A pressurized fluidized bed combined cycle power plant, comprising: a replacement water supply system; and a control valve and a flow meter for controlling the supply replacement water amount to a specified amount in the replacement water supply system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32262997A JP3604886B2 (en) | 1997-11-25 | 1997-11-25 | Pressurized fluidized bed combined cycle power plant and power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32262997A JP3604886B2 (en) | 1997-11-25 | 1997-11-25 | Pressurized fluidized bed combined cycle power plant and power plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11159305A true JPH11159305A (en) | 1999-06-15 |
| JP3604886B2 JP3604886B2 (en) | 2004-12-22 |
Family
ID=18145854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32262997A Expired - Fee Related JP3604886B2 (en) | 1997-11-25 | 1997-11-25 | Pressurized fluidized bed combined cycle power plant and power plant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3604886B2 (en) |
Cited By (4)
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| JP2003518220A (en) * | 1999-12-21 | 2003-06-03 | シーメンス アクチエンゲゼルシヤフト | Operation method of steam turbine equipment and steam turbine equipment operated by this method |
| JP2020134054A (en) * | 2019-02-21 | 2020-08-31 | 三菱日立パワーシステムズ株式会社 | Steam plant condensate supply system and operation method for the same |
| CN113882922A (en) * | 2021-09-16 | 2022-01-04 | 华润水泥(陆川)有限公司 | Automatic power generation control system of boiler waste heat |
| CN115075897A (en) * | 2022-06-20 | 2022-09-20 | 济南奔腾时代电力科技有限公司 | High-intermediate pressure cylinder combined starting system and method for steam turbine |
-
1997
- 1997-11-25 JP JP32262997A patent/JP3604886B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003518220A (en) * | 1999-12-21 | 2003-06-03 | シーメンス アクチエンゲゼルシヤフト | Operation method of steam turbine equipment and steam turbine equipment operated by this method |
| JP2020134054A (en) * | 2019-02-21 | 2020-08-31 | 三菱日立パワーシステムズ株式会社 | Steam plant condensate supply system and operation method for the same |
| CN113882922A (en) * | 2021-09-16 | 2022-01-04 | 华润水泥(陆川)有限公司 | Automatic power generation control system of boiler waste heat |
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