JP2006002729A - Steam turbine plant and moisture separation heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steam turbine plant provided with a means increasing energy efficiency of the plant by efficiently collecting energy which moisture separation heater vent steam has and a moisture separation heater for that. <P>SOLUTION: This steam turbine plant includes a steam generating source 1, a high pressure steam turbine 3, and a low pressure steam turbine 7 driven by exhaust steam from the high pressure steam turbine 3. The plant is provided with the moisture separation heater 4 installed between the high pressure steam turbine 3 and the low pressure steam turbine 7, separating and removing moisture of exhaust steam from the high pressure steam turbine 3, and having heaters 5, 6 heating high pressure steam turbine exhaust steam from which moisture is separated and removed by part of main steam and high pressure turbine bleed steam built therein. Each heater vent pipe 19, 20 of the moisture separation heater 4 is connected to the high pressure steam turbine 3 respectively to increase efficiency of the high pressure turbine 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a steam turbine plant, and more particularly, to improvement of thermal efficiency of a steam turbine plant including a moisture separator heater between a high-pressure steam turbine and a low-pressure steam turbine.

  A steam turbine plant employed in a nuclear power plant or the like often includes a high-pressure steam turbine and a low-pressure steam turbine driven by exhaust steam from the high-pressure steam turbine. A moisture separator is installed between the high-pressure steam turbine and the low-pressure steam turbine to separate and remove moisture from the exhaust steam of the high-pressure steam turbine. In recent years, moisture is separated and removed for higher efficiency. A moisture separator heater for heating the exhaust gas is installed.

  Further, even in a steam turbine plant in which a conventional moisture separator is installed, replacing the moisture separator with a moisture separator heater is an effective means for increasing the output.

  As the heating steam of the moisture separation heater, a part of high-temperature main steam or high-pressure steam turbine extraction steam is used, and heat is exchanged by condensation of the heating steam.

  In order to prevent overcooling of the condensed drain in the heat transfer tube and to separate and remove the non-condensable gas in the heater outlet water chamber, generally, vent steam is always discharged (for example, Patent Document 1). reference).

  It is necessary to discharge the vent vapor at a location lower than the heater pressure. Conventionally, vent piping was connected to a feed water heater to recover the heat of vent steam.

Japanese Patent Laid-Open No. 09-195713 (pages 2 to 3, FIGS. 2 and 3)

  In the case of a nuclear power plant, the feed water heater that is the vent steam discharge / heat recovery destination of the conventional moisture separation heater is about 1/3 of the main steam pressure even in the feed water heater with the highest pressure. The energy possessed by steam cannot be recovered efficiently.

  An object of the present invention is to provide a steam turbine plant equipped with means for efficiently recovering the energy of the moisture separation heater vent steam to increase the energy efficiency of the plant, a method for remodeling an existing steam turbine plant, a new plant and a remodeled plant It is to provide a moisture separator heater for.

  In order to achieve the above object, the present invention provides a high-pressure steam turbine including a high-pressure steam turbine driven by main steam from a steam generation source and a low-pressure steam turbine driven by exhaust steam of the high-pressure steam turbine. A moisture separation heater comprising a moisture separator for separating and removing moisture from exhaust steam of a steam turbine and a heater for heating exhaust steam of a high-pressure steam turbine from which moisture has been separated and removed by a part of main steam A steam turbine plant provided between a high-pressure steam turbine and a low-pressure steam turbine and having a heater vent pipe connected to the high-pressure steam turbine is proposed.

  The present invention also heats a moisture separator that separates and removes the moisture of the exhaust steam from the high-pressure steam turbine and a high-pressure steam turbine exhaust steam from which the moisture is separated and removed by a part of the extracted steam of the high-pressure steam turbine. A steam turbine plant is proposed in which a moisture separation heater comprising a heater is provided between a high-pressure steam turbine and a low-pressure steam turbine, and a vent pipe of the heater is connected to the high-pressure steam turbine.

  The present invention further includes a moisture separator that separates and removes the moisture of the exhaust steam of the high-pressure steam turbine, a heater that heats the exhaust steam of the high-pressure steam turbine from which moisture has been separated and removed by a part of the main steam, and a humidity. A moisture separation heater comprising a heater for heating the exhaust steam of the high-pressure steam turbine from which the components have been separated and removed by a part of the extracted steam of the high-pressure steam turbine is provided between the high-pressure steam turbine and the low-pressure steam turbine. A steam turbine plant is proposed in which a vent pipe of a heater that is heated by a part of steam is connected to a high-pressure steam turbine, and a vent pipe of a heater that is heated by a part of the extracted steam of the high-pressure steam turbine is also connected to the high-pressure steam turbine. .

  In order to achieve the above object, the present invention provides a high-pressure steam turbine driven by main steam from a steam generation source, a moisture separator that separates and removes moisture from the exhaust steam of the high-pressure steam turbine, In a modification method of an existing steam turbine plant including a low-pressure steam turbine driven by exhaust gas separated and removed, a moisture separator that removes a moisture separator and separates and removes moisture of the exhaust steam of the high-pressure steam turbine; A moisture separator heater comprising a heater that heats the exhaust steam of the high-pressure steam turbine from which moisture has been separated and removed by a part of the main steam is installed between the high-pressure steam turbine and the low-pressure steam turbine. A retrofitting method of an existing steam turbine plant that connects a vent pipe to a high-pressure steam turbine is proposed.

  The present invention also provides a moisture separator that removes the moisture from the exhaust steam of the high-pressure steam turbine and removes the moisture from the high-pressure steam turbine from which the moisture has been separated and removed. Modification of an existing steam turbine plant in which a moisture separator heater consisting of a heater that heats with a portion of steam is installed between the high-pressure steam turbine and the low-pressure steam turbine, and the vent pipe of the heater is connected to the high-pressure steam turbine Suggest a method.

  The present invention further includes a high-pressure steam turbine driven by main steam from a steam generation source, a moisture separator that separates and removes moisture from exhaust steam of the high-pressure steam turbine, and exhaust steam from which moisture is separated and removed. In a retrofitting method of an existing steam turbine plant including a low-pressure steam turbine driven by a moisture separator, the moisture separator is removed and the moisture is separated and removed by separating and removing the moisture of the exhaust steam from the high-pressure steam turbine. A heater that heats the exhaust steam of the high-pressure steam turbine by a part of the extraction steam of the high-pressure steam turbine, and a heater that heats the exhaust steam of the high-pressure steam turbine heated by the heater by a part of the main steam. A moisture separator heater is installed between the high-pressure steam turbine and the low-pressure steam turbine, and the vent pipe of the heater that is heated by a part of the main steam is connected to the high-pressure steam turbine. Vent pipe heater for heating the portion of the extraction steam of a steam turbine also proposes a method for retrofitting existing steam turbine plant to be connected to the high pressure steam turbine.

  In order to achieve the above object, the present invention has a connection port to a high-pressure steam turbine and a connection port to a low-pressure steam turbine, and separates and removes moisture from the exhaust steam of the high-pressure steam turbine and supplies it to the low-pressure steam turbine. The exhaust steam of the high-pressure steam turbine, which has a moisture separator, a connection port to the main steam pipe and a connection port to the high-pressure steam turbine inlet and from which moisture has been separated and removed, is heated by a part of the main steam. A moisture separator heater is proposed, which comprises a heater for supplying the vent steam of the vessel to the high-pressure steam turbine inlet.

  The present invention also includes a moisture separator having a connection port to a high-pressure steam turbine and a connection port to a low-pressure steam turbine, and separating and removing moisture from the exhaust steam of the high-pressure steam turbine and supplying the moisture to the low-pressure steam turbine; The exhaust steam of the high-pressure steam turbine, which has a connection port to the intermediate stage of the high-pressure steam turbine and a connection port to the subsequent stage of the intermediate stage and from which moisture has been separated and removed, is heated by a part of the extracted steam of the high-pressure steam turbine A moisture separation heater is proposed which comprises a heater for supplying the vent steam of the heater to a subsequent stage of the high-pressure steam turbine.

  The present invention further includes a moisture separator having a connection port to the high-pressure steam turbine and a connection port to the low-pressure steam turbine, and separating and removing moisture from the exhaust steam of the high-pressure steam turbine and supplying the moisture to the low-pressure steam turbine; The exhaust steam of the high-pressure steam turbine, which has a connection port to the main steam pipe and a connection port to the high-pressure steam turbine and from which moisture has been separated and removed, is heated by a part of the main steam, and the vent steam of this heater is used as the high-pressure steam. A high-pressure steam turbine is provided with a heater for supplying to the turbine, a connection port to an intermediate stage of the high-pressure steam turbine, and a connection port to a subsequent stage from the intermediate stage, and the exhaust steam of the high-pressure steam turbine from which moisture has been separated and removed A moisture separation heater is proposed which comprises a heater that is heated by a part of the extracted steam and supplies a vent steam of the heater to a subsequent stage of the high-pressure steam turbine.

  According to the present invention, the vent pipe of the moisture separation heater is connected to the high-pressure steam turbine, the vent steam is used as part of the steam for driving the high-pressure steam turbine, and the energy of the vent steam is effectively utilized. As the output increases, the piping around the feed water heater, which has been collected in the past, can be simplified and the amount of vent piping can be reduced.

  In addition, since a moisture separator / heater with a specified connection destination is provided to efficiently recover the energy of the vent steam, this moisture separator / heater can be used instead of the moisture separator of the existing steam turbine plant. If installed, even in an existing steam turbine plant, the energy efficiency of the plant can be increased.

  Next, with reference to FIGS. 1-3, embodiment of the steam turbine plant by this invention is described.

  Embodiments 1 to 3 are examples of newly installing a steam turbine plant, and Embodiments 4 to 6 are examples of modifying an existing steam turbine plant.

Embodiment 1
FIG. 1 is a diagram showing a system configuration of Embodiment 1 of a steam turbine plant according to the present invention.

  In the first embodiment, the main steam generated in the nuclear reactor (steam generation source) 1 is guided to the high-pressure steam turbine 3 through the main steam pipe 13 and the main steam stop valve / steam control valve 2, To drive.

  The exhaust steam from the high-pressure steam turbine 3 is guided to the moisture separation heater 4 by the cross-around pipe 14, and after the moisture is separated and removed by the moisture separation heater 4, in the heater 5, the main steam pipe 13 The main steam is heated by the main steam introduced through the main steam side heating steam pipe 17 branched from the main steam side.

  The steam heated by the moisture separator / heater 4 is guided to the low-pressure steam turbine 7 by the cross-around pipe 15 to drive the low-pressure steam turbine 7.

  The high-pressure steam turbine 3 and / or the low-pressure steam turbine 7 drives a generator, for example, and converts heat energy into electric energy.

  The exhaust steam from the low-pressure steam turbine 7 is condensed in the condenser 8. The condensate condensed in the condenser 8 is sent to the low-pressure feed water heater 10 by the condensate pump 9 and heated.

  The condensed water heated by the low-pressure feed water heater 10 is sent to the high-pressure feed water heater 12 by the feed water pump 11 and heated. The condensate heated by the high-pressure feed water heater 12 is fed again to the reactor (steam generation source) 1 through the feed water pipe 16.

  The steam turbine plant of FIG. 1 includes a heater 5 using a part of main steam as a heat source in a moisture separation heater 4. A part of the main steam is branched from the middle of the main steam pipe 13 and supplied to the heater 5 through the heating steam pipe 17. The drain condensed by heat exchange is collected in the high-pressure feed water heater 12 by the heater drain pipe 21 and used as a part of the feed water heating source.

  Conventionally, in the heater 5, in order to prevent overcooling of the condensed drain in the heat transfer tube and to separate and remove the non-condensable gas in the heater outlet water chamber, A vent pipe for constantly discharging vent steam from the vessel outlet water chamber was installed, and the connection destination was the high-pressure feed water heater 12.

  In a nuclear power plant, the internal pressure of the high-pressure feed water heater 12 is usually designed to be about 1/3 of the main steam pressure, and conventionally, the heater vent steam is reduced to a pressure of about 1/3. The pressure energy of the heater vent steam has not been effectively utilized since the pressure is reduced by a pressure reducing mechanism such as the above and then recovered in the high pressure feed water heater 12.

  In contrast, in the first embodiment of FIG. 1, the heater vent pipe 19 is connected to the inlet of the high-pressure steam turbine 3, and the vent steam is connected to the high-pressure steam turbine 3. That is, since the vent steam from the heater 5 is used as the steam for driving the high-pressure steam turbine and the energy of the heater vent steam is effectively used, the output of the high-pressure steam turbine 3 can be increased.

  Moreover, the piping connected to the high-pressure feed water heater 12 is reduced, the piping around the high-pressure feed water heater 12 is simplified, and the amount of vent piping can be reduced.

  1, the total pressure loss of the main steam side heating steam pipe 17, the heater 5, and the vent pipe 19 is smaller than the pressure loss of the main steam stop valve / steam control valve 2, and the heater vent steam The case where the pressure was larger than the inlet pressure of the high-pressure steam turbine 3 was assumed.

  Conversely, when the heater vent steam pressure becomes lower than the inlet pressure of the high-pressure steam turbine 3, the main steam vent pipe 19 is connected to a high-pressure steam turbine intermediate stage such as after the first stage of the high-pressure steam turbine 3.

<< Embodiment 2 >>
FIG. 2 is a diagram showing a system configuration of Embodiment 2 of the steam turbine plant according to the present invention.

  In the second embodiment, instead of the heater 5 using a part of the main steam shown in the first embodiment as a heat source, a heater 6 using a part of the extracted steam of the high-pressure steam turbine 3 as a heat source is used as a moisture separation heater. 4 is built in. A part of the steam is extracted from the middle stage of the high-pressure steam turbine 3 and supplied to the heater 6 through the heating steam pipe 18. The drain condensed by heat exchange is collected in the high-pressure feed water heater 12 by the drain pipe 22 and used as a part of the feed water heating source.

  In the second embodiment of FIG. 2, the heater vent pipe 20 is connected to the subsequent stage of the heated steam take-out stage from the high-pressure steam turbine 3. That is, since the vent steam from the heater 6 is used as the steam for driving the high-pressure steam turbine and the energy of the heater vent steam is effectively used, the output of the high-pressure steam turbine 3 can be increased.

  Moreover, the piping connected to the high-pressure feed water heater 12 is reduced, the piping around the high-pressure feed water heater 12 is simplified, and the amount of vent piping can be reduced.

<< Embodiment 3 >>
FIG. 3 is a diagram showing a system configuration of Embodiment 3 of the steam turbine plant according to the present invention.

  The third embodiment is a combination of the first and second embodiments. The heater 5 uses a part of main steam as a heat source, and the heater 6 uses a part of extracted steam of a high-pressure steam turbine as a heat source. The moisture separation heater 4 is built in the two-stage heater.

  The vent pipe 19 of the heater 5 is connected to the inlet of the high-pressure steam turbine 3, and the vent pipe 20 of the heater 6 is connected to the subsequent stage of the heating steam extraction stage from the high-pressure steam turbine 3, The output can be increased.

  The total pressure loss of the main steam side heating steam pipe 17, the heater 5, and the main steam side vent pipe 19 is smaller than the pressure loss of the main steam stop valve / steam control valve 2, and the heater vent steam pressure is higher than that of the high pressure steam turbine 3. It was assumed that the pressure was greater than the inlet pressure.

  Conversely, when the heater vent steam pressure becomes lower than the inlet pressure of the high-pressure steam turbine 3, the main steam vent pipe 19 is connected to a high-pressure steam turbine intermediate stage such as after the first stage of the high-pressure steam turbine 3.

  When the vent pipe 19 is connected to the high-pressure steam turbine inlet and the high-pressure steam turbine bleed-side vent pipe 20 is connected to the subsequent stage of the heated steam take-out stage from the high-pressure steam turbine 3, the output can be further increased.

  In the first to third embodiments, the drain condensed by heat exchange is collected in the high-pressure feed water heater 12 by the drain pipe 21 and / or the drain pipe 22, but the collection destination of the drain condensed by heat exchange. May be the low-pressure feed water heater 10 or both the low-pressure feed water heater 10 and the high-pressure feed water heater 12.

<< Embodiment 4 >>
Even in an existing steam turbine plant where only a conventional moisture separator is installed and operated, replacing the moisture separator with a moisture separator heater is an effective means to increase output. Yes.

  Embodiment 4 is an example in which a conventional moisture separator (not shown) is replaced with a moisture separation heater 4 that heats high-pressure steam turbine exhaust steam from which moisture has been separated and removed by a part of main steam.

  In place of the conventional moisture separator, when the moisture separation heater 4 for heating the high-pressure steam turbine exhaust steam from which the moisture is separated and removed by a part of the main steam is heated by a part of the main steam, 1 is replaced with the existing moisture separator 4, and a heating steam pipe 17, a heater vent pipe 19, and a heater drain pipe 21 need to be added.

  When an existing steam turbine plant in which only a conventional moisture separator is installed and operated is modified in this way, the same effect as in the first embodiment can be obtained.

<< Embodiment 5 >>
In the fourth embodiment, a conventional moisture separator (not shown) is replaced with a moisture separation heater 4 that heats the high-pressure steam turbine exhaust steam from which moisture has been separated and removed by a part of the high-pressure steam turbine extraction steam. It is.

  In place of the conventional moisture separator, when installing the moisture separation heater 4 for heating the high-pressure steam turbine exhaust steam from which moisture has been separated and removed by a part of the high-pressure steam turbine extraction steam, the heater 6 is included. It is necessary to replace the existing moisture separator with the moisture separation heater 4 of FIG. 2, and to add a heating steam pipe 18, a heater vent pipe 20, and a heater drain pipe 22.

  When an existing steam turbine plant in which only a conventional moisture separator is installed and operated is remodeled in this way, the same effect as in the second embodiment can be obtained.

Embodiment 6
In Embodiment 6, a conventional moisture separator (not shown) is used to heat the high-pressure steam turbine exhaust steam from which moisture has been separated and removed by using a part of main steam and a part of high-pressure steam turbine extraction steam. This is an example of modification to a heater.

  In place of the conventional moisture separator, when the moisture separator heater 4 is installed to heat the high-pressure steam turbine exhaust steam from which moisture has been separated and removed by a part of the main steam and a part of the high-pressure steam turbine extraction steam The moisture separator is replaced with the existing moisture separator 4 in FIG. 3 including the heater 5 and the heater 6, and the heating steam pipe 17 of the heater 5 and the heating of the heater 6 are heated. It is necessary to add a steam pipe 18, a vent pipe 19 of the heater 5, a vent pipe 20 of the heater 6, a drain pipe 21 of the heater 5, and a drain pipe 22 of the heater 6.

  When an existing steam turbine plant in which only a conventional moisture separator is installed and operated is remodeled in this way, the same effect as in the third embodiment can be obtained.

It is a figure which shows the system configuration | structure of Embodiment 1 of the steam turbine plant by this invention, and the system configuration | structure of Embodiment 4 after remodeling. It is a figure which shows the system configuration | structure of Embodiment 2 of the steam turbine plant by this invention, and the system configuration | structure of Embodiment 5 after remodeling. It is a figure which shows the system configuration | structure of Embodiment 3 of the steam turbine plant by this invention, and the system configuration | structure of Embodiment 6 after remodeling.

Explanation of symbols

1 Reactor (steam generation source)
2 Main Steam Stop Valve / Steam Control Valve 3 High Pressure Steam Turbine 4 Moisture Separation Heater 5 Heater Heated by Main Steam 6 High Pressure Steam Turbine Heater Heated by Extracted Steam 7 Low Pressure Steam Turbine 8 Condenser 9 Condensate Pump DESCRIPTION OF SYMBOLS 10 Low pressure feed water heater 11 Feed water pump 12 High pressure feed water heater 13 Main steam pipe 14 High pressure steam turbine outlet crossaround pipe 15 Moisture separation heater outlet crossaround pipe 16 Feed water pipe 17 Heating steam pipe 18 of heater 5 Heater 6 Steam pipe 19 of heater 5 Vent pipe 20 of heater 5 Vent pipe 21 of heater 6 Drain pipe 22 of heater 5 Drain pipe 23 of heater 6 High-pressure steam turbine bleed pipe to high-pressure feed water heater 12

Claims (9)

In a steam turbine plant including a high-pressure steam turbine driven by main steam from a steam generation source and a low-pressure steam turbine driven by exhaust steam of the high-pressure steam turbine,
Moisture separation comprising a moisture separator that separates and removes moisture from the exhaust steam of the high-pressure steam turbine and a heater that heats the exhaust steam of the high-pressure steam turbine from which moisture has been separated and removed by a part of the main steam. A heater is provided between the high pressure steam turbine and the low pressure steam turbine;
A steam turbine plant, wherein a vent pipe of the heater is connected to the high-pressure steam turbine. In a steam turbine plant including a high-pressure steam turbine driven by main steam from a steam generation source and a low-pressure steam turbine driven by exhaust steam of the high-pressure steam turbine,
A moisture separator that separates and removes moisture from the exhaust steam of the high-pressure steam turbine; and a heater that heats the exhaust steam of the high-pressure steam turbine from which moisture has been separated and removed by a part of the extracted steam of the high-pressure steam turbine. A moisture separator and heater between the high pressure steam turbine and the low pressure steam turbine,
A steam turbine plant, wherein a vent pipe of the heater is connected to the high-pressure steam turbine. In a steam turbine plant including a high-pressure steam turbine driven by main steam from a steam generation source and a low-pressure steam turbine driven by exhaust steam of the high-pressure steam turbine,
A moisture separator for separating and removing moisture from the exhaust steam of the high-pressure steam turbine; a heater for heating the exhaust steam of the high-pressure steam turbine from which moisture has been separated and removed by a part of the extracted steam of the high-pressure steam turbine; and A moisture separator heater comprising a heater for heating the high-pressure steam turbine exhaust steam heated by the heater with a part of the main steam is provided between the high-pressure steam turbine and the low-pressure steam turbine;
A vent pipe of a heater that is heated by a part of the steam is connected to the high-pressure steam turbine, and a vent pipe of a heater that is heated by a part of the extracted steam of the high-pressure steam turbine is also connected to the high-pressure steam turbine. A featured steam turbine plant. A high-pressure steam turbine driven by main steam from a steam generation source, a moisture separator for separating and removing moisture from the exhaust steam of the high-pressure steam turbine, and a low-pressure driven by exhaust steam from which moisture has been separated and removed In a method for remodeling an existing steam turbine plant including a steam turbine,
Remove the moisture separator,
Moisture separation comprising a moisture separator that separates and removes moisture from the exhaust steam of the high-pressure steam turbine and a heater that heats the exhaust steam of the high-pressure steam turbine from which moisture has been separated and removed by a part of the main steam. A heater is installed between the high pressure steam turbine and the low pressure steam turbine;
A method for remodeling an existing steam turbine plant, wherein a vent pipe of the heater is connected to the high-pressure steam turbine. A high-pressure steam turbine driven by main steam from a steam generation source, a moisture separator for separating and removing moisture from the exhaust steam of the high-pressure steam turbine, and a low-pressure driven by exhaust steam from which moisture has been separated and removed In a method for remodeling an existing steam turbine plant including a steam turbine,
Remove the moisture separator,
A moisture separator that separates and removes moisture from the exhaust steam of the high-pressure steam turbine; and a heater that heats the exhaust steam of the high-pressure steam turbine from which moisture has been separated and removed by a portion of the extracted steam of the high-pressure steam turbine. A moisture separator and heater is installed between the high-pressure steam turbine and the low-pressure steam turbine,
A method for remodeling an existing steam turbine plant, wherein a vent pipe of the heater is connected to the high-pressure steam turbine. A high-pressure steam turbine driven by main steam from a steam generation source, a moisture separator for separating and removing moisture from the exhaust steam of the high-pressure steam turbine, and a low-pressure driven by exhaust steam from which moisture has been separated and removed In a method for remodeling an existing steam turbine plant including a steam turbine,
Remove the moisture separator,
A moisture separator that separates and removes moisture from the exhaust steam of the high-pressure steam turbine, and a heater that heats the exhaust steam of the high-pressure steam turbine from which moisture has been separated and removed by a part of the main steam and moisture are separated and removed A moisture separation heater comprising a heater for heating the exhaust steam of the high pressure steam turbine, which is heated by a part of the extracted steam of the high pressure steam turbine, is installed between the high pressure steam turbine and the low pressure steam turbine,
A vent pipe of a heater that is heated by a part of the main steam is connected to the high-pressure steam turbine, and a vent pipe of a heater that is heated by a part of the extracted steam of the high-pressure steam turbine is also connected to the high-pressure steam turbine. A method for remodeling an existing steam turbine plant. A moisture separator having a connection port to the high-pressure steam turbine and a connection port to the low-pressure steam turbine, and separating and removing moisture from the exhaust steam of the high-pressure steam turbine and supplying the moisture to the low-pressure steam turbine;
The exhaust steam of the high-pressure steam turbine, which has a connection port to the main steam pipe and a connection port to the high-pressure steam turbine and from which moisture has been separated and removed, is heated by a part of the main steam, and the vent steam of the heater is A moisture separator heater comprising a heater for supplying to a high-pressure steam turbine. A moisture separator having a connection port to the high-pressure steam turbine and a connection port to the low-pressure steam turbine, and separating and removing moisture from the exhaust steam of the high-pressure steam turbine and supplying the moisture to the low-pressure steam turbine;
Exhaust steam from the high-pressure steam turbine, which has a connection port to the intermediate stage of the high-pressure steam turbine and a connection port to the subsequent stage from the intermediate stage and from which moisture has been separated and removed, is partly extracted from the extracted steam of the high-pressure steam turbine. A moisture separation heater comprising: a heater for heating and supplying the vent steam of the heater to the latter stage of the high-pressure steam turbine. A moisture separator having a connection port to the high-pressure steam turbine and a connection port to the low-pressure steam turbine, and separating and removing moisture from the exhaust steam of the high-pressure steam turbine and supplying the moisture to the low-pressure steam turbine;
The exhaust steam of the high-pressure steam turbine, which has a connection port to the main steam pipe and a connection port to the high-pressure steam turbine and from which moisture has been separated and removed, is heated by a part of the main steam, and the vent steam of the heater is A heater for supplying the high-pressure steam turbine;
Exhaust steam from the high-pressure steam turbine, which has a connection port to the intermediate stage of the high-pressure steam turbine and a connection port to the subsequent stage from the intermediate stage and from which moisture has been separated and removed, is partly extracted from the extracted steam of the high-pressure steam turbine. A moisture separation heater comprising: a heater for heating and supplying the vent steam of the heater to the latter stage of the high-pressure steam turbine.

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