WO2014148517A1 - 蒸気タービンプラント - Google Patents
蒸気タービンプラント Download PDFInfo
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- WO2014148517A1 WO2014148517A1 PCT/JP2014/057422 JP2014057422W WO2014148517A1 WO 2014148517 A1 WO2014148517 A1 WO 2014148517A1 JP 2014057422 W JP2014057422 W JP 2014057422W WO 2014148517 A1 WO2014148517 A1 WO 2014148517A1
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- pressure
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Classifications
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- 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
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
- F01K7/22—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type the turbines having inter-stage steam heating
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- 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
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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- 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
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/34—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
- F01K7/38—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating the engines being of turbine type
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- 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
- F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
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- 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
- F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
- F01K9/02—Arrangements or modifications of condensate or air pumps
- F01K9/023—Control thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
- F28B1/02—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using water or other liquid as the cooling medium
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B7/00—Combinations of two or more condensers, e.g. provision of reserve condenser
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
Definitions
- the present invention relates to a steam turbine plant, and more particularly to a steam turbine plant having a multi-stage pressure condenser.
- the steam that drives the steam turbine is exhausted from the turbine and guided to a condenser.
- the steam guided to the condenser is condensed by exchanging heat with the cooling water guided to the condenser and returning to water (condensate).
- Condensate condensed in the condenser is heated via a feed water heater and supplied to the boiler.
- the heated condensate supplied to the boiler becomes steam and is used as a drive source for the steam turbine.
- the multi-stage pressure condenser consisting of multiple chambers with different pressures. Is used.
- this multistage pressure condenser there exists a condenser described in patent document 1, for example.
- the lower portion of the low pressure chamber is partitioned by a pressure partition, and a reheat chamber is provided in which the low pressure side condensate is introduced and stored.
- the multistage pressure condenser described in Patent Document 1 allows high-pressure steam in a high-pressure chamber, which is a high-pressure side chamber, to be introduced into the reheat chamber and also bypasses the reheat chamber. And a low pressure side condensate exiting the reheat chamber are joined to increase the temperature of the condensate.
- a heat transfer tube that is submerged in the condensate is provided, and a vent of a deaerator that performs deaeration of water supplied to the nuclear reactor, for example, is introduced into the heat transfer tube, thereby further improving the efficiency. It is set as the structure which aims at making.
- vent of the deaerator contains a lot of non-condensable gas, so it cannot be injected directly into the condensate, and the amount of vent of the deaerator is limited, which limits the improvement of reheat efficiency. There is.
- the present invention provides a steam turbine plant having a multi-stage pressure condenser that can improve reheat efficiency as compared with a conventional multi-stage pressure condenser.
- the steam turbine plant is provided with a plurality of steam turbines and below each of the steam turbines so as to correspond to the plurality of steam turbines, and is discharged from each of the steam turbines.
- a multistage pressure condenser comprising a plurality of condensers for condensing the steam to be stored as condensate, and a part of the steam in the steam turbine is converted into the lowest pressure steam of the plurality of condensers And a bleed portion introduced into the condensate of the condenser corresponding to the turbine.
- the temperature of the condensate can be increased more efficiently than before by using a part of the steam of the steam turbine as a heat source for the condensate.
- the extraction unit is provided in at least two of the plurality of steam turbines, and at least one extraction unit is selected from the extraction units of the at least two steam turbines. Thus, extraction may be performed by the at least one extraction unit.
- the extraction unit may be configured to perform extraction from an extraction stage having an appropriate pressure.
- extraction from a plurality of extraction stages can be mixed, so that steam having a more appropriate steam condition can be extracted into the reheating chamber.
- the condenser corresponding to the lowest pressure steam turbine has steam injection means for directly injecting the steam into the condensate, and the extraction unit supplies the condenser to the condensate.
- the introduction of the steam may be performed via the steam injection unit.
- a condenser corresponding to the lowest pressure steam turbine includes a heat transfer pipe that passes through the inside of the condensate, and the steam is supplied to the condenser condensate by the extraction unit.
- the introduction may be performed through the heat transfer tube.
- the steam of the steam turbine can be used as a heat source for condensate.
- the multistage pressure condenser includes a plurality of chambers having different pressures and a low-pressure chamber, which is the chamber on the low-pressure side, divided in a vertical direction, and a pressure partition including a perforated plate having a plurality of holes And the low-pressure side condensate by exchanging heat with the low-pressure side steam introduced into the low-pressure chamber and introduced into the low-pressure chamber.
- the temperature of the condensate can be increased more efficiently than before by using a part of the steam of the steam turbine as a heating source of the condensate in addition to the high-pressure side steam in the high-pressure chamber.
- the temperature of the condensate can be increased more efficiently than before by using a part of the steam of the steam turbine as a heat source for the condensate.
- FIG. 1 is a schematic configuration diagram of a steam turbine plant according to a first embodiment of the present invention. It is a schematic block diagram of the steam turbine plant of 2nd embodiment of this invention. It is a schematic block diagram of the heat exchanger tube of the modification which concerns on 1st and 2nd embodiment of this invention.
- the steam turbine plant 1 of the present embodiment includes a plurality of low-pressure turbines including a first low-pressure turbine 2, a second low-pressure turbine 3, and a third low-pressure turbine 4, and a plurality of low-pressure turbines.
- a multi-stage pressure condensate comprising a plurality of condensers 7, 8, 9 that are respectively provided below each low-pressure turbine so as to condense and condense steam discharged from each low-pressure turbine and store it as condensate.
- a boiler not shown).
- the plurality of low-pressure turbines 2, 3, 4 are connected to a high-pressure turbine (not shown) via a pipe 6.
- the multistage pressure condenser 5 is a three-cylinder multistage pressure condenser configured by connecting three condensers 7, 8, 9 of a high pressure stage condenser 7, an intermediate pressure stage condenser 8, and a low pressure stage condenser 9. It is a water vessel.
- the plurality of low-pressure turbines 2, 3, and 4 are mounted on the upper portions of the low-pressure stage condenser 9, the intermediate-pressure stage condenser 8, and the high-pressure stage condenser 7, respectively.
- the high-pressure stage condenser 7 is provided with a high-pressure cylinder 10 into which exhaust steam from the low-pressure turbine 4 is introduced from above the high-pressure stage condenser 7.
- the intermediate pressure stage condenser 8 is provided with an intermediate pressure cylinder 11 into which exhaust steam from the low pressure turbine 3 is introduced from above the intermediate pressure stage condenser 8.
- the low-pressure stage condenser 9 is provided with a low-pressure body 12 into which exhaust steam from the low-pressure turbine 2 is introduced from above the low-pressure stage condenser 9.
- a high pressure chamber 13, an intermediate pressure chamber 14, and a low pressure chamber 15 are formed inside the high pressure cylinder 10, the intermediate pressure cylinder 11, and the low pressure cylinder 12.
- the cooling water pipe group 17 comprised from many heat exchanger tubes is arrange
- a first pressure bulkhead 18 that is horizontal to the bottom surface of the intermediate pressure cylinder 11 is fixed to the lower part of the intermediate pressure cylinder 11.
- the intermediate pressure cylinder 11 is divided into an upper intermediate pressure chamber 14 and a lower first reheating chamber 19 in the vertical direction.
- a second pressure partition wall 20 is fixed to the lower portion of the low-pressure cylinder 12 so as to be horizontal to the bottom surface of the low-pressure cylinder 12.
- the low-pressure cylinder 12 is partitioned into an upper low-pressure chamber 15 and a lower second reheating chamber 21.
- Each of the pressure partition walls 18 and 20 is a perforated plate, and condensate introduction holes 18a and 20a are formed in a predetermined region at the center.
- the high pressure chamber 13 communicates with the first reheating chamber 19 of the intermediate pressure cylinder 11 by the first steam duct 23 (high pressure side steam introducing means), and the high pressure steam in the high pressure chamber 13 passes through the first steam duct 23 to One reheat chamber 19 is sent.
- the intermediate pressure cylinder 11 is communicated with the second reheating chamber 21 of the low pressure cylinder 12 by the second steam duct 24, and the high pressure steam in the high pressure chamber 13 is transferred to the first steam duct 23 and the first reheating of the intermediate pressure cylinder 11. It is sent to the second reheating chamber 21 through the chamber 19 and the second steam duct 24.
- a first tray 25 that is a receiving member is disposed horizontally with respect to the bottom surface of the intermediate pressure cylinder 11.
- This first tray 25 is set below the area where the condensate introduction hole 18a is formed in the first pressure partition wall 18 so as to be wider than this area, and can receive medium pressure condensate dripped from this condensate introduction hole 18a. It is configured.
- the first tray 25 is configured to overflow the received intermediate pressure condensate from the outer peripheral portion and drop it, and store the intermediate pressure condensate in the first reheating chamber 19 as condensate.
- a second tray 26 is disposed horizontally with respect to the bottom surface of the low-pressure cylinder 12.
- the second tray 26 is set below the region where the condensate introduction hole 20a is formed in the second pressure partition wall 20 so as to be wider than this region, and can receive the low-pressure condensate dripped from the condensate introduction hole 20a. It is configured.
- the second tray 26 is configured to overflow the received low-pressure condensate from the outer peripheral portion and drop it, and store the low-pressure condensate in the second reheat chamber 21 as condensate.
- the high pressure chamber 13 and the first reheating chamber 19 of the intermediate pressure cylinder 11 are connected by a first connecting pipe 27, and the first reheating chamber 19 of the intermediate pressure cylinder 11 and the second reheating chamber 21 of the low pressure cylinder 12 are connected.
- a second connecting pipe 28 is connected to a discharge part 29 provided at the lower part of the high-pressure chamber 13.
- the 1st low-pressure turbine 2 of this embodiment is connected with the 1st end of the extraction flow path 32 which is an extraction part which extracts a part of the steam which drives the 1st low-pressure turbine 2.
- a vent injection pipe 33 that functions as a steam injection means is disposed below the second reheating chamber 21 of the low-pressure stage condenser 9.
- the vent injection pipe 33 is a nozzle configured to be able to inject the fluid introduced thereinto to the outside, and is arranged at a position so as to be submerged in the condensate stored in the second reheat chamber 21. Yes.
- the second end of the extraction path is connected to the vent injection pipe 33. That is, the steam turbine plant 1 of the present embodiment can introduce the bleed air of the first low-pressure turbine 2 into the condensate of the second reheat chamber 21 through the vent injection pipe 33.
- the exhaust steam from the low pressure turbines 2, 3, 4 in the steam turbine plant 1 is sent to the high pressure chamber 13, the intermediate pressure chamber 14, and the low pressure chamber 15 in the multistage pressure condenser 5.
- the exhaust steam moving downward in the high pressure chamber 13, the intermediate pressure chamber 14, and the low pressure chamber 15 is condensed by coming into contact with the cooling water pipe group 17.
- the high-pressure condensate condensed in the high-pressure chamber 13 is stored in the lower portion of the high-pressure chamber 13.
- the intermediate pressure condensate condensed in the intermediate pressure chamber 14 is stored in the lower portion of the intermediate pressure chamber 14.
- the low-pressure condensate condensed in the low-pressure chamber 15 is stored in the lower portion of the low-pressure chamber 15.
- the intermediate pressure condensate condensed in the intermediate pressure chamber 14 is temporarily stored on the first pressure partition wall 18, dropped from the condensate introduction hole 18 a, and on the first tray 25 of the first reheating chamber 19. It is dropped and stored. Then, the medium pressure condensate on the first tray 25 overflows and falls in the first reheating chamber 19.
- the high-pressure steam from the high-pressure chamber 13 is sent through the first steam duct 23, and the medium-pressure condensate dripping from the condensate introduction hole 18 a to the first tray 25 is passed through the high-pressure steam. It is heated by contact heat transfer by dropping. Furthermore, medium pressure condensate overflowing the first tray 25 is heated by contact heat transfer by dropping in the high pressure steam.
- the low-pressure condensate condensed in the low-pressure chamber 15 is temporarily stored on the second pressure partition wall 20 and dropped from the condensate introduction hole 20a on the second tray 26 of the second reheating chamber 21. It is dropped and stored. Then, the low-pressure condensate on the second tray 26 overflows and falls in the second reheating chamber 21.
- the high-pressure steam in the intermediate-pressure chamber 14 is sent through the second steam duct 24, and the low-pressure condensate dripping from the condensate introduction hole 20a to the second tray 26 passes through the high-pressure steam. It is heated by contact heat transfer by dropping. Furthermore, the low-pressure condensate overflowing the second tray 26 is heated by contact heat transfer by dropping in the high-pressure steam.
- the low-pressure condensate stored in the second reheating chamber 21 of the low-pressure cylinder 12 flows into the first reheating chamber 19 of the intermediate-pressure cylinder 11 through the second connecting pipe 28.
- the condensate mixed with the low pressure condensate and the medium pressure condensate in the first reheating chamber 19 flows into the high pressure chamber 13 through the first connecting pipe 27.
- the condensate mixed with the low pressure condensate, the medium pressure condensate, and the high pressure condensate in the high pressure chamber 13 is discharged from the discharge portion 29 to the cooling water pipe 30.
- a part of the steam of the first low-pressure turbine 2 is sent to the second reheating chamber 21 via the extraction passage 32.
- a part of this steam is injected into the condensate in the second reheating chamber 21 through the vent injection pipe 33.
- the condensate stored in the second reheating chamber 21 is heated by the steam injected from the vent injection pipe 33.
- the temperature of the condensate can be increased more efficiently than before by using the extraction air of the low-pressure turbine 2 as a heating source of the condensate in addition to the steam of the high-pressure stage condenser 7. Moreover, the effect which stirs condensate can also be acquired.
- the low-pressure turbine to be extracted is the turbine of the low-pressure chamber 15, but may be extracted from the low-pressure turbines of the intermediate pressure chamber 14 and the high-pressure chamber 13.
- the steam turbine plant 1B which concerns on 2nd embodiment of this invention is demonstrated based on drawing.
- the steam turbine plant 1 ⁇ / b> B of the present embodiment has the first low-pressure turbine 2, compared with the steam turbine plant 1 of the first embodiment that is extracted from only the first low-pressure turbine 2.
- the extraction is controlled by selecting from at least one of the second low-pressure turbine 3 and the third low-pressure turbine 4.
- the first low-pressure turbine 2 is connected to the first end of the first extraction channel 32.
- the second low-pressure turbine 3 is connected to the first end of the second extraction channel 35.
- the third low-pressure turbine 4 is connected to the first end of the third extraction channel 36.
- the second ends of the extraction channels 32, 35, and 36 are connected together and connected to the vent injection pipe 33.
- the extraction of the low-pressure turbine is configured so that extraction can be performed from an extraction stage (pressure stage) with an appropriate pressure.
- an extraction stage that goes back about two stages from the outlet side of the low-pressure turbines 2, 3, and 4 takes into account the differential pressure with the extraction flow paths 32, 35, and 36.
- the selection of the extraction stage is preferably designed in consideration of the extraction efficiency.
- the drain condensed steam
- the drain is designed not to flow downstream as much as possible and less steam is drawn into the extraction side.
- a heat transfer tube 38 is provided so as to pass through the condensate, and the extracted steam is introduced into the heat transfer tube 38. That is, a part of the steam of the low-pressure turbine is not directly introduced into the condensate, and the heat of the steam is transmitted to the condensate via the heat transfer pipe 38.
- the steam introduced into the heat transfer tube 38 may be extracted by a pump such as a vacuum pump 39 or may be supplied to a predetermined flash box. According to the modified example, even when non-condensable gas is included in the extracted steam, the steam of the steam turbine can be used as a heat source for condensate.
- a configuration may be added in which the bleed air is reduced to an appropriate pressure by an expansion valve or the like as necessary.
- the temperature of the condensate can be increased more efficiently than before by using a part of the steam of the steam turbine as a heat source for the condensate.
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Abstract
Description
さらに、この多段圧復水器では、復水に水没させる伝熱管を設け、この伝熱管に例えば原子炉に供給される給水の脱気を行う脱気器のベントを導入することで、さらなる効率化を図る構成としている。
以下、本発明の実施形態について図面を参照して詳細に説明する。
図1に示すように、本実施形態の蒸気タービンプラント1は、第一低圧タービン2、第二低圧タービン3、及び第三低圧タービン4から構成される複数の低圧タービンと、複数の低圧タービンに対応するように各々の低圧タービンの下方にそれぞれ設けられて、各々の低圧タービンから排出される蒸気を凝縮させて復水として収容する複数の復水器7,8,9からなる多段圧復水器5と、ボイラ(図示せず)を有している。
そして、この高圧胴10、中圧胴11、低圧胴12の内部には、高圧室13、中圧室14、低圧室15が形成されている。そして、高圧室13、中圧室14、低圧室15を貫通するように、多数の伝熱管から構成される冷却水管群17が配置されている。冷却水管群17内の冷却水は、低圧室15、中圧室14、高圧室13の順に流れることから、各室の圧力は、高い順に、高圧室13、中圧室14、低圧室15に設定される。
蒸気タービンプラント1における低圧タービン2,3,4からの排気蒸気は、多段圧復水器5における高圧室13、中圧室14、低圧室15に送られる。この高圧室13、中圧室14、低圧室15を下方に移動する排気蒸気は、冷却水管群17と接触することにより凝縮される。そして、高圧室13で凝縮した高圧復水は、この高圧室13の下部に溜められる。また、中圧室14で凝縮した中圧復水は、この中圧室14の下部に溜められる。低圧室15で凝縮した低圧復水は、この低圧室15の下部に溜められる。
また、復水を撹拌する効果も得ることができる。
以下、本発明の第二実施形態に係る蒸気タービンプラント1Bを図面に基づいて説明する。なお、本実施形態では、上述した第一実施形態との相違点を中心に述べ、同様の部分についてはその説明を省略する。
図2に示すように、本実施形態の蒸気タービンプラント1Bは、第一実施形態の蒸気タービンプラント1が第一低圧タービン2のみから抽気しているのと比較して、第一低圧タービン2、第二低圧タービン3、及び第三低圧タービン4の少なくとも一つの低圧タービンから選択して抽気の制御を行うことが可能な構成とされている。
この変形例においては、図3に示すように、復水を通過するように伝熱管38を設け、抽気された蒸気がこの伝熱管38に導入されるように構成されている。即ち、低圧タービンの蒸気の一部が直接復水に導入される構成とされておらず、伝熱管38を介して蒸気の熱が復水に伝達されるようになっている。伝熱管38に導入された蒸気は、真空ポンプ39などのポンプによって引き抜いてもよいし、所定のフラッシュボックスに供給されるようにしてもよい。
上記変形例によれば、抽気される蒸気に不凝縮ガスが含まれている場合においても、蒸気タービンの蒸気を復水の加熱源として用いることができる。
例えば、上記各実施形態においては、三胴型の多段圧復水器として説明したが、低圧段復水器と高圧段復水器で構成される二胴型の多段圧復水器や、四胴以上の復水器で構成される多段圧復水器であっても、本発明を適用することが可能である。
2 第一低圧タービン(蒸気タービン)
3 第二低圧タービン(蒸気タービン)
4 第三低圧タービン(蒸気タービン)
5 多段圧復水器
6 配管
7 高圧段復水器
8 中圧段復水器
9 低圧段復水器
10 高圧胴
11 中圧胴
12 低圧胴
13 高圧室
14 中圧室
15 低圧室
17 冷却水管群
18 第一圧力隔壁
19 第一再熱室
20 第二圧力隔壁
21 第二再熱室
23 第一蒸気ダクト(高圧側蒸気導入手段)
24 第二蒸気ダクト(高圧側蒸気導入手段)
25 第一トレイ
26 第二トレイ
27 第一連結管
28 第二連結管
29 排出部
30 冷却水配管
32 抽気流路(抽気部)
33 ベント注入管(蒸気噴射手段)
Claims (6)
- 複数の蒸気タービンと、
前記複数の蒸気タービンに対応するように各々の蒸気タービンの下方にそれぞれ設けられて、各々の蒸気タービンから排出される蒸気を凝縮させて復水として収容する複数の復水器からなる多段圧復水器と、
前記蒸気タービン内の蒸気の一部を、前記複数の復水器のうちの最も低圧の蒸気タービンに対応する復水器の復水に導入する抽気部と、を備える
蒸気タービンプラント。 - 請求項1に記載の蒸気タービンプラントであって、
前記抽気部は、前記複数の蒸気タービンのうち少なくとも二つの蒸気タービンに設けられており、
前記少なくとも二つの蒸気タービンの抽気部のうち、少なくとも一つの抽気部が選択されるように制御されて、前記少なくとも一つの抽気部により、抽気が実施される
蒸気タービンプラント。 - 請求項2に記載の蒸気タービンプラントであって、
前記抽気部は、適切な圧力の抽気段から抽気が行えるように構成されている
蒸気タービンプラント。 - 請求項1~請求項3のいずれか一項に記載の蒸気タービンプラントであって、
前記最も低圧の蒸気タービンに対応する復水器は、前記復水に直接前記蒸気を噴射する蒸気噴射手段を有し、
前記抽気部による前記復水器の復水への前記蒸気の導入は、前記蒸気噴射手段を介して行われる
蒸気タービンプラント。 - 請求項1~請求項3のいずれか一項に記載の蒸気タービンプラントであって、
前記最も低圧の蒸気タービンに対応する復水器は、前記復水の内部を通過する伝熱管を有し、
前記抽気部による前記復水器の復水への前記蒸気は、前記伝熱管に導入される
蒸気タービンプラント。 - 請求項1から請求項5のいずれか一項に記載の蒸気タービンプラントであって、
前記多段圧復水器は、
圧力が異なる複数の室と、
低圧側の前記室である低圧室を上下方向に分割し、複数の孔を有する多孔板を備えた圧力隔壁と、
前記圧力隔壁によって仕切られた前記低圧室の上部に設けられて、冷却水が導入されて前記低圧室に導かれた低圧側蒸気と熱交換することにより前記低圧側蒸気を低圧側復水に凝縮する冷却水管群と、
前記圧力隔壁によって仕切られた前記低圧室の下部であって、前記圧力隔壁の前記孔から流下する前記低圧側復水が溜まる再熱室と、
高圧側の前記室である高圧室内の高圧側蒸気を前記再熱室に導入する高圧側蒸気導入手段と、を備える
蒸気タービンプラント。
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CN201480016351.XA CN105189941B (zh) | 2013-03-22 | 2014-03-18 | 蒸汽涡轮设备 |
US14/777,589 US9726048B2 (en) | 2013-03-22 | 2014-03-18 | Steam turbine plant |
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CN105189941B (zh) | 2017-03-15 |
CN105189941A (zh) | 2015-12-23 |
US9726048B2 (en) | 2017-08-08 |
KR20150119339A (ko) | 2015-10-23 |
JP2014185532A (ja) | 2014-10-02 |
EP2960445A4 (en) | 2016-03-16 |
KR101718647B1 (ko) | 2017-03-21 |
EP2960445A1 (en) | 2015-12-30 |
JP6101527B2 (ja) | 2017-03-22 |
US20160290171A1 (en) | 2016-10-06 |
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