JP2011069271A - Power plant and method of operating the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power plant improving the electric output. <P>SOLUTION: The boiling water type nuclear power plant 1 supplies the steam generated in a nuclear reactor 2 to a high-pressure turbine 3 and a low-pressure turbine. The steam discharged from the high-pressure turbine 3 is superheated by a moisture separation superheater 33 and is supplied to the low-pressure turbine 5B. The moisture separation superheater 33 includes a moisture separator 4 and a superheater 34A. The steam bled from the low-pressure turbine 5B is supplied to a steam compressor 28 through a steam supply pipe 31 and is compressed. The steam compressed and raised in temperature is supplied to the superheater 34A through a steam supply pipe 32. The steam discharged from the high-pressure turbine 3 is got rid of moisture in the moisture separator 4 and is superheated in the superheater 34A by the compressed steam supplied from the steam compressor 28. A steam flow rate supplied to the high-pressure turbine 3 and the low-pressure turbine is increased and the electric output of the boiling water type nuclear power plant 1 is improved. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a power plant and an operation method thereof, and more particularly to a power plant suitable for application to a boiling water nuclear power plant and an operation method thereof.

  In a conventional boiling water nuclear power plant, steam generated in a nuclear reactor is supplied to a high-pressure turbine and a low-pressure turbine through main steam piping, and these turbines are rotated to generate electricity. The steam exhausted from the low-pressure turbine is condensed into water by the condenser. This water is supplied to the reactor through a water supply pipe as water supply. The feed water is pressurized by a feed water pump provided in the feed water pipe, heated by six feed water heaters (four low pressure feed water heaters and two high pressure feed water heaters) provided in the feed water pipe, and temperature is increased. Is increased.

  In a boiling water nuclear power plant, the thermal output of the reactor is first determined, and the steam flow downstream from the reactor (main steam piping and turbine Flow). Specifically, when the steam exhausted from the low-pressure turbine is condensed into water by a condenser, approximately 2/3 of the thermal energy generated in the reactor is recovered at normal reactor pressure from the principle of the thermal cycle. It is discharged from the water container to the outside. Therefore, in order to improve the thermal efficiency of the boiling water nuclear power plant, a part of the steam is extracted from the high-pressure turbine and the low-pressure turbine and supplied to the high-pressure feed water heater and the low-pressure feed water heater. Heating feed water using extraction steam is performed. In this case, most of the heat possessed by the extracted steam is used for heating the feed water, so that most of the heat is recovered and the thermal efficiency of the boiling water nuclear power plant is improved.

  Generally, of the steam generated in the nuclear reactor, the amount of steam finally exhausted from the low-pressure turbine to the condenser is about 56%, and the remaining about 44% is used as the extraction steam for heating the feed water. . In the six feed water heaters installed in the feed water pipe, the amount of extracted steam supplied per feed water heater is on average about 7% of the steam generated in the reactor.

  In boiling water nuclear power plants, steam exhausted from a high-pressure turbine is superheated by a moisture separation superheater (or moisture separation reheater) and supplied to the low-pressure turbine (Japanese Patent Laid-Open No. 2005-2005). No. 299644 and JP-A-7-189609). The moisture separator superheater generally has a moisture separator that removes moisture contained in steam exhausted from the high-pressure turbine, and a multi-stage superheater that superheats the steam from which moisture has been removed. The first superheater on the upstream side uses the steam extracted from the high-pressure turbine to superheat the steam from which moisture has been removed by the moisture separator. The downstream second superheater superheats the steam superheated by the first superheater using the steam extracted from the main steam pipe upstream from the high-pressure turbine. This superheated steam is supplied to the low pressure turbine. In a boiling water nuclear power plant equipped with a moisture separator superheater, the amount of steam finally discharged from the low-pressure turbine to the condenser is about 54% of the steam generated in the nuclear reactor. In order to improve the thermal efficiency of a boiling water nuclear power plant, it is generally well known that a moisture separation superheater is installed and the performance is improved by reheating efficiency.

  By installing a moisture separation superheater in a pressurized water nuclear power plant, which is another nuclear power plant, and a thermal power plant, the thermal efficiency of each power plant can be improved.

  In order to increase the thermal efficiency of a power plant, an example of a thermal power plant to which a steam heat pump having compression is applied is proposed in Japanese Utility Model Laid-Open No. 1-123001. In this thermal power plant, the steam supplied from the condenser is compressed by a single steam compressor, and the compressed steam is supplied to four feed water heaters from a plurality of locations in the axial direction of the steam compressor. ing. Further, since the steam compressor adiabatically compresses the steam and the internal energy rises and becomes overheated, condensate is sprayed into the compressor in a mist form to prevent this and save the required power.

  Japanese Unexamined Patent Publication No. 5-65808 describes a co-heated steam turbine plant. This co-heat steam turbine plant supplies steam generated in a boiler to a turbine, rotates a generator to generate electric power, and discharges steam discharged from the turbine to a high-pressure process steam supply destination and a low-pressure process steam supply destination. Supply each. The steam supplied to the high pressure process steam supply destination compresses the steam exhausted from the turbine with a compressor.

JP 2005-299644 A JP-A-7-189609 JP-A-5-65808 Japanese Utility Model Publication No. 1-123001

  In general, in the Rankine cycle, wet steam exhausted by working in a high-pressure turbine is converted into superheated steam by a moisture separation superheater, and this superheated steam is shared with the low-pressure turbine, thereby improving the thermal efficiency of the power plant. In order to superheat the wet steam exhausted from the high-pressure turbine with a moisture separator superheater, the steam generated by the steam generator (reactor in a boiling water nuclear power plant) is extracted from the main steam pipe upstream from the high-pressure turbine. Then, it is supplied to the superheater of the moisture separator superheater. As a result, the flow rate of the steam, which is the working fluid used to rotate the high-pressure turbine and the low-pressure turbine, is reduced by about 2%. However, in the moisture separator superheater, the steam from which moisture has been removed by the moisture separator is superheated by the superheater, and this superheated steam is supplied to the low pressure turbine, so the work by the steam in the low pressure turbine increases. The thermal efficiency of a power plant such as a boiling water nuclear power plant is improved.

  Although it is preferable for a power plant to superheat steam exhausted from a high-pressure turbine with a moisture separator superheater, a reduction in the amount of steam supplied to the turbine leads to a reduction in work in the turbine.

  The objective of this invention is providing the power plant which can improve an electrical output, and its operating method.

  A feature of the present invention that achieves the above-described object is that a first turbine to which steam is sequentially supplied by a main steam pipe connected to a steam generator for generating steam, a second turbine having a lower pressure than the first turbine, A moisture separation superheater having a moisture separator and at least one superheater, and a condenser for condensing steam exhausted from the second turbine, provided in a main steam pipe between the first turbine and the second turbine; A main steam system, a water supply pipe connecting the condenser and the steam generator, a steam compressor for compressing the steam, and a main steam system formed downstream of the first stage blades of the first turbine The first steam supply pipe that is connected to the bleed position and guides the steam extracted from the bleed position to the steam compressor, and the steam compressed by the steam compressor is directly supplied by the steam exhausted from the moisture separator Second leading to the superheater It lies in the fact that with a gas supply pipe.

  The steam extracted from the extraction position of the main steam system formed downstream of the first stage blades of the first turbine and worked in the first turbine is guided to the steam compression device by the first steam supply pipe and steam is supplied. Since the steam compressed by the compressor and compressed by the steam compressor can be led to a superheater to which steam exhausted from the moisture separator is directly supplied, the amount of steam flowing into the first turbine is increased. Can be made. For this reason, the work volume by the steam in a 1st turbine increases, and it can improve the electrical output of a power plant.

  ADVANTAGE OF THE INVENTION According to this invention, the electrical output in a power plant can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram of the boiling water nuclear power plant which is a power plant of Example 1 which is one suitable Example of this invention. It is a block diagram of the boiling water nuclear power plant which is a power plant of Example 2 which is another Example of this invention. It is a block diagram of the boiling water nuclear power plant which is a power plant of Example 3 which is another Example of this invention. It is a block diagram of the boiling water nuclear power plant which is a power plant of Example 4 which is another Example of this invention. It is a block diagram of the boiling water nuclear power plant which is a power plant of Example 5 which is another Example of this invention. It is a block diagram of the boiling water nuclear power plant which is a power plant of Example 6 which is another Example of this invention. It is a block diagram of the boiling water nuclear power plant which is a power plant of Example 7 which is another Example of this invention. It is a block diagram of the boiling water nuclear power plant which is a power plant of Example 8 which is another Example of this invention. It is a block diagram of the boiling water nuclear power plant which is a power plant of Example 9 which is another Example of this invention. It is a block diagram of the boiling water nuclear power plant which is a power plant of Example 10 which is another Example of this invention. It is a block diagram of the thermal power plant which is a power plant of Example 11 which is another Example of this invention. It is a block diagram of the pressurized water nuclear power plant which is a power plant of Example 12 which is another Example of this invention. It is a block diagram of the fast breeder reactor nuclear power plant which is a power plant of Example 13 which is another Example of this invention. It is a block diagram of the thermal power plant which is a power plant of Example 14 which is another Example of this invention.

  As a result of examining the measures for improving the thermal efficiency of the power plant, the inventors may introduce the steam extracted from the main steam pipe upstream of the high-pressure turbine supplied to the superheater of the moisture separation superheater to the high-pressure turbine. The conclusion was reached. Stopping steam extraction from the main steam line upstream of the high pressure turbine to the moisture separator superheater and directing this steam to the high and low pressure turbines increases the amount of steam supplied to these turbines The work of steam in the turbine increases.

  However, a separate heating source for steam exhausted from the high-pressure turbine must be prepared. As a result of studying this point, the inventors newly utilized a heat pump having a compressor to compress the steam worked in the turbine with the compressor and supply it to the superheater of the moisture separation superheater. I found a new finding. For example, the steam that has driven the low-pressure turbine is extracted from the low-pressure turbine, supplied to the compressor, and compressed by the compressor to increase the temperature. The compressed steam whose temperature has risen is led from the compressor to the superheater of the moisture separation superheater, and the steam exhausted from the high-pressure turbine is superheated with this compressed steam. As a result, the amount of steam supplied from the steam generator to the high-pressure turbine during operation of the power plant is increased, and the power plant in the reheat cycle that superheats the steam exhausted from the high-pressure turbine using the moisture separation superheater. It can be realized.

  A moisture separation reheater having a moisture separator and a reheater may be used in place of the moisture separation superheater. The moisture separation reheater is a kind of moisture separation superheater having a moisture separator and a superheater, respectively.

  Examples of the present invention reflecting the above examination results will be described below.

  A power plant according to embodiment 1, which is a preferred embodiment of the present invention, will be described with reference to FIG. The power plant of the present embodiment is a boiling water nuclear power plant 1.

  A boiling water nuclear power plant 1 includes a reactor 2 as a steam generator, a high-pressure turbine (first turbine) 3, low-pressure turbines (second turbines) 5A, 5B, and 5C, a main steam pipe 6, a condenser 11, A plurality of feed water heaters, feed water pipes 15, a vapor compression device 27, and a moisture separation superheater (humidity separation superheater) 33 including a moisture separator 4 and a superheater 34A are provided. The plurality of feed water heaters include a first high pressure feed water heater 16A, a second high pressure feed water heater 16B, a third low pressure feed water heater (first low pressure feed water heater) 17A, and a fourth low pressure feed water heater (second low pressure feed water heater). A heater) 17B, a fifth low-pressure feed water heater (third low-pressure feed water heater) 17C, and a sixth low-pressure feed water heater (fourth low-pressure feed water heater) 17D. The low pressure feed water heater is a feed water heater to which extracted steam from a low pressure turbine is supplied. The high-pressure feed water heater is a feed water heater to which extracted steam from the high-pressure turbine or the main steam pipe 6 on the outlet side of the high-pressure turbine is supplied. The high-pressure turbine 3 and the low-pressure turbines 5 </ b> A, 5 </ b> B, 5 </ b> C are connected to the nuclear reactor 2 by the main steam pipe 6. The moisture separation superheater 33 is installed in the main steam pipe 6 connecting the high pressure turbine 3 and the low pressure turbines 5A, 5B and 5C. The main steam pipe 6 is branched into three downstream from the moisture separation superheater 33 and connected to the low pressure turbines 5A, 5B and 5C. An isolation valve 7 and a main steam control valve 8 are installed in the main steam pipe 6 existing between the nuclear reactor 2 and the high-pressure turbine 3. The high-pressure turbine 3 and the low-pressure turbines 5 </ b> A, 5 </ b> B, and 5 </ b> C are connected to each other by one rotating shaft 10 and further connected to the generator 9. In this embodiment, one high-pressure turbine and three low-pressure turbines are provided, but these numbers may be changed depending on the type of power plant.

  This embodiment has a main steam system and a water supply system. The main steam system includes a high pressure turbine 3, a moisture separation superheater 33, low pressure turbines 5 </ b> A, 5 </ b> B, 5 </ b> C, a main steam pipe 6, and a condenser 11. The feed water system includes a feed water pipe 15, a first high pressure feed water heater 16A, a second high pressure feed water heater 16B, a third low pressure feed water heater 17A, a fourth low pressure feed water heater 17B, a fifth low pressure feed water heater 17C, and a sixth. It has a low-pressure feed water heater 17D, a condensate pump 18 and a feed water pump 19.

  The condenser 11 has a plurality of heat transfer tubes 12 disposed therein. These heat transfer pipes 12 are connected to a seawater supply pipe 13A and a seawater discharge pipe 13B. A seawater circulation pump 14 is installed in the seawater supply pipe 13A. The seawater supply pipe 13A and the seawater discharge pipe 13B extend to the sea.

  A water supply pipe 15 connects the condenser 11 and the reactor 2. The first high-pressure feed water heater 16A, the second high-pressure feed water heater 16B, the third low-pressure feed water heater 17A, the fourth low-pressure feed water heater 17B, the fifth low-pressure feed water heater 17C, and the sixth low-pressure feed water heater 17D From the furnace 2 toward the condenser 11, they are installed in the water supply pipe 15 in this order. A condensate pump 18 is provided in the feed water pipe 15 between the condenser 11 and the sixth low-pressure feed water heater 17D. A feed water pump 19 is provided in the feed water pipe 15 between the first high pressure feed water heater 16A and the second high pressure feed water heater 16B.

  The extraction pipe 20 connected to the high pressure turbine 3 at the extraction point of the high pressure turbine 3 is connected to the first high pressure feed water heater 16A. A drain pipe 35 connected to the superheater 34A is connected to the first high-pressure feed water heater 16A. A bleed pipe 21 connected to the main steam pipe 6 existing between the high pressure turbine 3 and the moisture separator superheater 33 is connected to the second high pressure feed water heater 16B. The bleed pipe 21 may be connected to the high pressure turbine 3 downstream from the moving blades at the final stage of the high pressure turbine 3. The extraction pipe 22 connected to the low pressure turbine 5B at the most upstream extraction point (the first extraction point of the low pressure turbine) of the low pressure turbine 5B is connected to the third low pressure feed water heater 17A. A drain pipe 26 connected to the moisture separator 4 is connected to the third low-pressure feed water heater 17A. A bleed pipe 23 connected to the low pressure turbine 5B at the second bleed point from the upstream side of the low pressure turbine 5B (second bleed point of the low pressure turbine) is connected to the fourth low pressure feed water heater 17B. The extraction pipe 24 connected to the low pressure turbine 5B at the third extraction point (the third extraction point of the low pressure turbine) from the upstream of the low pressure turbine 5B is connected to the fifth low pressure feed water heater 17C. The extraction pipe 25 connected to the low pressure turbine 5B at the most downstream extraction point (fourth extraction point of the low pressure turbine) of the low pressure turbine 5B is connected to the sixth low pressure feed water heater 17D. The first, second, third, and fourth extraction points of the low-pressure turbine described above are positions of different stages of the plurality of stationary blades provided in the low-pressure turbine 5B, and the turbine casing (not shown) of the low-pressure turbine 5B. ). The first high-pressure feed water heater 16A, the second high-pressure feed water heater 16B, the third low-pressure feed water heater 17A, the fourth low-pressure feed water heater 17B, the fifth low-pressure feed water heater 17C, and the sixth low-pressure feed water heater 17D are connected. The drain water recovery pipe 36 is connected to the condenser 11.

  In FIG. 1, the low-pressure turbine 5B is large and the low-pressure turbines 5A and 5C are small, but the sizes of these low-pressure turbines are the same. Although not shown in figure, the condenser 11 is each provided also to the low pressure turbines 5A and 5C, and the water supply piping 15 is connected to each condenser 11, respectively. The feed water pipes 15 respectively connected to a total of three condensers 11 respectively provided corresponding to the low pressure turbines 5A, 5B and 5C are at a junction located upstream of the second high pressure feed water heater 16B. One feed water pipe 15 is connected to the second high-pressure feed water heater 16B. A third low-pressure feed water heater 17A, which is a low-pressure feed water heater, and a fourth low-pressure feed pipe are arranged in parallel to each of the low-pressure turbines 5A, 5B and 5C arranged upstream from the junction. The feed water heater 17B, the fifth low pressure feed water heater 17C, the sixth low pressure feed water heater 17D, and the condensate pump 18 are installed in this order from the downstream to the upstream. Therefore, the third low-pressure feed water heater 17A, the fourth low-pressure feed water heater 17B, the fifth low-pressure feed water heater 17C, and the sixth low-pressure feed water heater 17D, which are provided corresponding to the low-pressure turbines 5A and 5C, respectively. And each water supply piping 5 which installed the condensate pump 18 is arrange | positioned upstream from said confluence | merging point which exists upstream from the 2nd high pressure feed water heater 16B. Similarly to the low-pressure turbine 5B, the low-pressure turbines 5A and 5C are provided with first, second, third, and fourth extraction points. As with the low pressure turbine 5B, the extraction pipes 22, 23, 24, and 25 are connected to the first, second, third, and fourth extraction points of the low pressure turbine 5A. The extraction pipes 22, 23, 24 and 25 connected to the low-pressure turbine 5A are provided with a third low-pressure feed water heater 17A and a fourth low-pressure feed water heating provided corresponding to the low-pressure turbine 5A, as in the low-pressure turbine 5B. 17B, the fifth low-pressure feed water heater 17C and the sixth low-pressure feed water heater 17D. As with the low-pressure turbine 5B, the extraction pipes 22, 23, 24, and 25 are also connected to the first, second, third, and fourth extraction points of the low-pressure turbine 5C. The extraction pipes 22, 23, 24, and 25 connected to the low-pressure turbine 5C are similar to the low-pressure turbine 5B in the third low-pressure feed water heater 17A and the fourth low-pressure feed water heating provided corresponding to the low-pressure turbine 5C. 17B, the fifth low-pressure feed water heater 17C and the sixth low-pressure feed water heater 17D.

  In the following description, the third low-pressure feed water heater 17A, the fourth low-pressure feed water heater 17B, the fifth low-pressure feed water heater 17C, the sixth low-pressure feed water heater 17D, the extraction pipes 22, 23, 24 and 25, and the first The second, third, and fourth extraction points mean those provided for the low-pressure turbine 5B unless otherwise specified.

  The vapor compression device 27 includes a vapor compressor 28, a drive device (for example, a motor) 29, and a control valve 30. The driving device 29 is connected to the rotating shaft of the vapor compressor 28. A steam supply pipe (first steam supply pipe) 31 connected to the third extraction point of the low-pressure turbine 5 </ b> B is connected to the steam inlet of the steam compressor 28. A steam supply pipe (second steam supply pipe) 32 connects the steam outlet of the steam compressor 28 and the superheater 34A. A control valve 30 is provided in the steam supply pipe 32. The steam compressor 28 is not installed in the extraction pipes 20 to 25 through which the extraction steam flows. In the present embodiment, a single-stage centrifugal steam compressor is used as the vapor compressor 28, but other types of compressors may be used as the vapor compressor 28. The steam compressor 28 and the drive device 29 are installed in an empty space in the turbine building.

  The third bleed point to which the bleed pipe 24 is connected and the third bleed point to which the steam supply pipe 31 is connected are positions where the stationary blades of the same number of stages of the low pressure turbine 5B are provided in the circumferential direction of the low pressure turbine 5B. They are out of alignment. The steam supply pipe 31 may be connected to the extraction pipe 24. The flow passage cross-sectional area of the steam supply pipe 31 is made smaller than that of the extraction pipe 24 so that the amount of steam supplied to the third low-pressure feed water heater 17 </ b> A through the extraction pipe 24 is not reduced by driving the steam compressor 28. . Instead of changing the flow path cross-sectional area of the piping, a flow rate adjusting valve may be provided in the steam supply pipe 31 to adjust the amount of steam supplied to the steam compressor 28. The method for adjusting the steam flow rate by changing the flow cross-sectional area of the extraction pipe and the steam supply pipe 31 or the method for adjusting the steam flow rate by the flow rate control valve provided in the steam supply pipe 31 is described in Examples 2 to 14 described later. This also applies to each embodiment.

  The steam compressor 27 is also provided for each of the low pressure turbines 5A and 5C other than the low pressure turbine 5B. For this reason, in this embodiment, three vapor compression devices 27 are provided. Also in the steam compressor 27 provided for the low pressure turbine 5A, the steam supply pipe 31 connected to the steam compressor 28 is connected to the third extraction point of the low pressure turbine 5A. A steam supply pipe 32 having a control valve 30 is also connected to the steam compressor 28 of the steam compressor 27. Also in the steam compressor 27 provided for the steam compressor 28 and the low pressure turbine 5C, the steam supply pipe 31 connected to the steam compressor 28 is connected to the third extraction point of the low pressure turbine 5C. A steam supply pipe 32 having a control valve 30 is also connected to the steam compressor 28 of the steam compressor 27. The respective steam supply pipes 32 connected to the respective steam compressors 28 of the three steam compressors 27 become one steam supply pipe 32 downstream of the control valve 30 and are connected to the superheater 34A.

  Cooling water is supplied to a core (not shown) in the nuclear reactor 2 by a recirculation pump (not shown) and a jet pump (not shown). The cooling water is heated by heat generated by fission of nuclear fuel material contained in a plurality of fuel assemblies (not shown) loaded in the core, and a part of the cooling water becomes steam. The steam generated in the nuclear reactor 2 is supplied to the high-pressure turbine 3 and the low-pressure turbines 5A, 5B, and 5C through the main steam pipe 6. The steam discharged from the high-pressure turbine 3 is guided to the low-pressure turbines 5A, 5B, and 5C after the moisture is removed by the moisture separator 4 and superheated by the superheater 34A. The pressure in the low pressure turbines 5 </ b> A, 5 </ b> B and 5 </ b> C is lower than the pressure in the high pressure turbine 3. The high-pressure turbine 3 and the low-pressure turbines 5A, 5B, and 5C are driven by steam and rotate the generator 9. Thereby, electric power is generated. The steam exhausted from the low-pressure turbines 5A, 5B and 5C is condensed in each condenser 11 to become water. That is, seawater is supplied into each heat transfer pipe 12 in each condenser 11 through the seawater supply pipe 13 </ b> A by driving the seawater circulation pump 14. The steam exhausted from the low-pressure turbines 5A, 5B and 5C is cooled and condensed by seawater flowing in the heat transfer pipes 12 in the condensers 11 provided separately corresponding to the respective steams. Due to the condensation of the steam, the temperature of the seawater flowing through each heat transfer tube 12 increases. Seawater discharged from each heat transfer tube 12 is discharged to the sea through the seawater discharge tube 13B.

  A condensate pump 18 and a feed pump 19 provided in each feed water pipe 15 separately connected to each condenser 11 are respectively driven. Condensed water generated in each condenser 11 is boosted by these pumps as feed water, passes through each feed water pipe 15, and is supplied between the third low-pressure feed water heater 17A and the second high-pressure feed water heater 16B. Are fed to the water supply pipe 15 and supplied to the reactor 2. The feed water flowing in the three feed water pipes 15 is provided with a sixth low-pressure feed water heater 17D, a fifth low-pressure feed water heater 17C, a fourth low-pressure feed water heater 17B, and a third low-pressure feed provided corresponding to each low-pressure turbine. Heated sequentially by the feed water heater 17A. 1 commonly used for the low-pressure turbines 5A, 5B and 5C downstream from the junction of the three water supply pipes 15 existing between the third low-pressure feed water heater 17A and the second high-pressure feed water heater 16B. Further heated by the second high-pressure feed water heater 16B and the first high-pressure feed water heater 16A provided in the main water supply pipe 15, the temperature is raised, and the set temperature is supplied to the reactor 2.

  The feed water is heated by the extraction steam extracted from the fourth extraction point of the low pressure turbine 5B and supplied through the extraction pipe 25 in the sixth low pressure feed water heater 17D. The feed water is heated by the extracted steam supplied from the third extraction point of the low-pressure turbine 5B and supplied through the extraction pipe 24 in the fifth low-pressure feed water heater 17C. The feed water is heated by the bleed steam supplied from the second bleed point of the low pressure turbine 5B and supplied through the bleed pipe 23 in the fourth low pressure feed water heater 17B. In the third low-pressure feed water heater 17A, the feed water is extracted from the first extraction point of the low-pressure turbine 5B and supplied through the extraction pipe 22, and discharged from the moisture separator 4 and supplied through the drain pipe 26. Heated by saturated drain water. The feed water is heated by the extraction steam extracted from the main steam pipe 6 and supplied through the extraction pipe 21 in the second high-pressure feed water heater 16B. In the first high pressure feed water heater 16A, the feed water is extracted from the extraction point of the high pressure turbine 3 and supplied through the extraction pipe 20, and the saturated drain water supplied from the superheater 34A and supplied through the drain pipe 35. Heated by.

  The sixth low-pressure feed water heater 17D, the fifth low-pressure feed water heater 17C, the fourth low-pressure feed water heater 17B, and the third low-pressure feed water heater 17A provided corresponding to each of the low-pressure turbines 5A and 5C are also described above. The feed water flowing through each feed water pipe 15 is heated using each extraction steam.

  The function of the vapor compression apparatus 27 will be described. The driving device 29 is driven using the in-house power, that is, a part of the power generated by the generator 9 to rotate the rotor provided with the moving blades of the steam compressor 28. The steam extracted from the low pressure turbine 5B at the third extraction point is supplied to the steam compressor 28 through the steam supply pipe 31. The steam is compressed by driving the steam compressor 28 to increase the pressure, and then discharged to the steam supply pipe 32. Since the steam is adiabatically compressed by the steam compressor 28, the temperature also rises. The temperature of the compressed steam rises to near the temperature of the steam supplied to the high-pressure turbine 3. The steam compressed by the respective steam compressors 28 of the three steam compressors 27 is merged and supplied to the superheater 34A. The steam whose temperature and pressure have increased due to compression by each steam compressor 28 is adjusted by the opening degree of each control valve 30 so that the temperature and flow rate of the steam become the required heating amount ( (Not shown) and is supplied to the plurality of heat transfer tubes of the superheater 34 </ b> A through the steam supply tube 32. The compressed steam supplied into the heat transfer tube is superheated steam. The steam discharged from the moisture separator 4 supplied by the main steam pipe 6 and flowing outside the heat transfer pipes in the superheater 34A is discharged from the steam compressor 28 by the steam supply pipe 32 in the superheater 34A. Superheated by the supplied steam. The steam superheated by the superheater 34A is supplied to the low-pressure turbines 5A, 5B and 5C through the main steam pipe 6. The heat transfer areas of the plurality of heat transfer tubes provided in the superheater 34A are provided in the first and second superheaters included in the moisture separation superheater provided in the conventional boiling water nuclear power plant. It is equal to the total heat transfer area of the heat transfer tubes.

  The steam compressed by the steam compressor 28 and supplied to the superheater 34A is condensed by superheating the steam exhausted from the high-pressure turbine 3 by the superheater 34A. The saturated drain water generated by the condensation of the steam is supplied to the first high-pressure feed water heater 16A through the drain pipe 35 connected to the heat transfer pipe of the superheater 34A. The temperature of the saturated drain water is substantially the same as the temperature of the extracted steam flowing in the extraction pipe 20, and is used for heating the feed water as described above.

  When the wetness of the steam supplied to the steam compressor 28 through the steam supply pipe 31 is high, a mist separator is installed in the steam supply pipe 31 and included in the steam supplied to the steam compressor 28 from the low-pressure turbine 5B. The removed moisture may be removed by a mist separator. On the contrary, when the saturated steam is compressed by the steam compressor 28 and a rapid temperature rise occurs and the dryness of the steam exhausted from the steam compressor 28 increases, spraying of fine water droplets in the steam compressor 28. That is, mist spraying may be performed to lower the dryness of the compressed steam.

  In the present embodiment, the steam extracted from the low-pressure turbine 5B and increased in pressure by the steam compressor 28 is used as a heat source for superheating the steam by the superheater 34A.

  You may control the rotation speed and output of the drive device 29 of the steam compressor 28 using a variable frequency power supply device. It is also possible to set the steam flow rate and pressure by changing the rated operating point of the steam compressor 28 using a variable frequency power supply device. By appropriately setting the flow rate and pressure of the steam, the steam compressor 28 can be operated efficiently.

  In this embodiment, steam extracted from the high-pressure turbine 3 and the low-pressure turbines 5A, 5B, 5C is guided to the high-pressure feed water heaters and the low-pressure feed water heaters to heat the feed water. Steam temperature is recovered and the temperature of the feed water supplied to the reactor 2 rises. For this reason, the thermal efficiency of the nuclear reactor 2 is improved.

  In the present embodiment, not the steam extracted from the main steam pipe 6 upstream from the high pressure turbine 3, but the steam that has worked to drive the turbine with the high pressure turbine 3 and the low pressure turbine (for example, the low pressure turbine 5B), for example, the low pressure turbine. The air is extracted from 5B, compressed by the vapor compressor 28, brought into a high temperature and high pressure state, and supplied to the superheater 34A.

  In this embodiment, the heating steam supplied to the superheater 34A needs to be extracted from the main steam pipe 6 upstream of the high-pressure turbine 3 and the high-pressure turbine 3 as in a conventional boiling water nuclear power plant. The steam that has been conventionally used for heating in the moisture separator superheater can be supplied to the high-pressure turbine 3 and each low-pressure turbine. For this reason, compared with the conventional boiling water nuclear power plant which supplies the steam extracted from the main steam piping 6 etc. of the upstream of the high pressure turbine 3 to a superheater (for example, two-stage superheater), In the boiling water nuclear power plant 1, the amount of steam supplied to the high-pressure turbine 3 and each low-pressure turbine increases. Therefore, the amount of work by steam in the high-pressure turbine 3 and each low-pressure turbine increases, and the electrical output can be improved. This means that in the boiling water nuclear power plant 1, the power improvement operation for further increasing the rated reactor power is substantially performed.

  In the present embodiment, as described above, the steam compressor 27 is installed, the steam extracted from the low-pressure turbine 5B is compressed using the steam compressor 28, the temperature is increased, and the steam whose temperature has been increased is superheated. 34A is supplied. For this reason, without using the steam extracted from the main steam pipe 6 upstream from the high-pressure turbine 3, the steam that has been removed by the moisture separator 4 using the steam compressed by the steam compressor 28 is used as the high-pressure turbine. 3 can be heated by the superheater 34A substantially equivalently to the case where steam extracted from the main steam pipe 6 upstream of 3 is used. Since the temperature of the steam supplied to the low-pressure turbine rises and the amount of expansion of the steam in the low-pressure turbine increases, the work by the steam in the low-pressure turbine increases. This also further improves the electrical output of the boiling water nuclear power plant 1.

  Further, since the steam extracted from each low-pressure turbine is compressed by the respective steam compressor 28 and used for superheating the steam exhausted from the high-pressure turbine 3 in the superheater 34A, the reactor 2 which is a steam generator is used. The generated heat can be used effectively in the boiling water nuclear power plant 1, and the amount of heat of the hot drainage discharged from the condenser 11 through the seawater discharge pipe 13B to the sea can be reduced. Therefore, the thermal efficiency in the boiling water nuclear power plant 1 of the reheat cycle can be further improved.

  The steam compression ratio by the steam compressor 28 can be adjusted by adjusting the opening degree of the control valve 30 (or controlling the rotational speed of the driving device 29 by the variable frequency power supply device). Thereby, the temperature of the steam which exists in the steam compressor 28 can be adjusted.

  The number of stages of the steam compressor 28 of the steam compressor 27 may be a plurality of stages. By providing a multi-stage steam compressor 28 and compressing the steam compressed by the upstream steam compressor 28 by the downstream steam compressor 28, the temperature of the steam compressed by the downstream compressor 28 is further increased. Can be increased.

  The steam supply pipe 31 may be connected to the low pressure turbine 5B at any one of the first, second, and fourth extraction points instead of the third extraction point.

  The present embodiment can be applied to an improved boiling water nuclear power plant (ABWR power plant) using an internal pump as a pump for supplying cooling water to the core. Examples 2 to 10 described later can also be applied to the ABWR power plant.

  In this embodiment and in Embodiments 2 to 14 described later, a moisture separation reheater may be used instead of the moisture separation superheater. The moisture separator reheater includes a moisture separator and a reheater. When the moisture separation reheater is used, the superheater 34A becomes a reheater.

  A power plant according to embodiment 2, which is another embodiment of the present invention, will be described with reference to FIG. The power plant of the present embodiment is a boiling water nuclear power plant 1A.

  The boiling water nuclear power plant 1A has a configuration in which the connection destination of the steam supply pipe 31 is changed in the boiling water nuclear power plant 1 of the first embodiment. In the present embodiment, the steam supply pipe 31 guides the steam exhausted from the low pressure turbine 5B to the condenser 11, and connects the low pressure turbine 5B and the condenser 11 with the steam exhaust passage 37 (or the condenser 11). (Region above the heat transfer tube 12). The other configuration of the boiling water nuclear power plant 1A is the same as that of the boiling water nuclear power plant 1.

  A different part from the boiling water nuclear power plant 1 is demonstrated. Steam exhausted from the low-pressure turbine 5B and flowing in the steam exhaust passage 37 is extracted by the steam supply pipe 31 and supplied to the steam compressor 28. The steam compressor 28 rotated by the driving device 29 compresses the steam guided by the steam supply pipe 31. The steam whose temperature has been increased by being compressed by the steam compressor 28 is supplied to the superheater 34A through the steam supply pipe 32, exhausted from the high-pressure turbine 3, and the moisture is separated by the moisture separator 4 as in the first embodiment. The removed steam is heated. The steam superheated by the superheater 34A is supplied to the low pressure turbines 5A, 5B, 5C. In the present embodiment, the rotational speed of the driving device 29 is larger than the rotational speed of the driving device 29 in the first embodiment. For this reason, the temperature of the steam extracted from the steam exhaust passage 37 having a temperature lower than the third extraction point of the low-pressure turbine 5B is converted to the temperature of the steam supplied to the superheater 34A in the first embodiment by the steam compressor 28. Can be raised to the same temperature. Instead of increasing the rotational speed of the drive device 29, the steam extracted by connecting a plurality of stages of steam compressors 28 may be compressed sequentially.

  According to the present embodiment, each effect generated in the first embodiment can be obtained.

  A power plant according to embodiment 3, which is another embodiment of the present invention, will be described with reference to FIG. The power plant of the present embodiment is a boiling water nuclear power plant 1B.

  The boiling water nuclear power plant 1B has a configuration in which the steam supply pipe 31 is connected to the high pressure turbine 3 in the boiling water nuclear power plant 1 of the first embodiment. The other configuration of the boiling water nuclear power plant 1B is the same as that of the boiling water nuclear power plant 1.

  A different part from the boiling water nuclear power plant 1 is demonstrated. The extraction point where the steam supply pipe 31 is connected to the high-pressure turbine 3 and the extraction point where the extraction pipe 20 is connected to the high-pressure turbine 3 are positions where the stationary blades of the same number of stages of the high-pressure turbine 3 are provided. 3 are displaced from each other in the circumferential direction. The steam supply pipe 31 may be connected to the extraction pipe 20. The extraction point of the high pressure turbine 3 to which the extraction pipe 20 is connected is formed at a position where, for example, a stationary blade downstream of the second stage moving blade is provided downstream of the first stage moving blade of the high pressure turbine 3. Has been.

  The steam extracted from the high-pressure turbine 3 by the steam supply pipe 31 is supplied to the steam compressor 28 of the steam compressor 27 through the steam supply pipe 31 and compressed by the steam compressor 28. The steam whose temperature has increased due to the compression is supplied to the superheater 34A through the steam supply pipe 32 in the same manner as in the first embodiment. The temperature of the steam discharged from the steam compressor 28 is raised to a predetermined temperature by adjusting the rotation speed of the driving device 29. The steam exhausted from the high-pressure turbine 3 and moisture removed by the moisture separator 4 is superheated by the steam supplied through the steam supply pipe 32 in the superheater 34A. The steam superheated by the superheater 34A is supplied to the low pressure turbines 5A, 5B, 5C.

  In this embodiment, not the steam extracted from the main steam pipe 6 upstream from the high-pressure turbine 3, but the steam that has worked to drive the turbine by the high-pressure turbine 3 is extracted from the high-pressure turbine 3 and compressed by the steam compressor 28. The high temperature and high pressure state is then supplied to the superheater 34A.

  In this embodiment, it is necessary to extract the heating steam supplied to the moisture separation superheater 33 from the main steam pipe 6 upstream of the high-pressure turbine 3 as in a conventional boiling water nuclear power plant. However, conventionally, steam extracted from the main steam pipe 6 and used for heating in the moisture separation superheater can be supplied to the high-pressure turbine 3. In the boiling water nuclear power plant 1B of the present embodiment, the amount of steam supplied to the high pressure turbine 3 is increased as compared with the conventional boiling water nuclear power plant. Therefore, the amount of work by steam in the high-pressure turbine 3 increases, and the electrical output can be improved.

  In the present embodiment, since the steam compressed by the steam compressor 28 is extracted by the high-pressure turbine 3, the amount of steam supplied to the low-pressure turbines 5A, 5B, 5C is reduced by the amount of the extracted steam, The work of steam in the low-pressure turbine is reduced. For this reason, in this embodiment, the degree of improvement in electrical output is lower than that in the first embodiment. However, in this embodiment, the steam extracted from the high-pressure turbine 3 is supplied to the steam compressor 28, so the temperature of the steam supplied to the steam compressor 28 is supplied to the steam compressor 28 in the first embodiment. The temperature of the steam is higher. For this reason, when the temperature of the steam supplied from the steam compressor 28 to the superheater 34A is equal to that of the first embodiment, the flow rate of the steam extracted from the high-pressure turbine 3 to supply the steam compressor 28 in this embodiment. May be less than the flow rate of the steam extracted from the low-pressure turbine 5B in order to supply the steam compressor 28 in the first embodiment. In the present embodiment, the flow rate of the steam extracted from the high pressure turbine 3 can be reduced, and accordingly, the flow rate of steam supplied to the low pressure turbine can be increased and the work amount in the low pressure turbine can be increased.

  In the present embodiment, the steam that has worked in the high-pressure turbine 3 is extracted and supplied to the steam compressor 28, and the steam whose temperature has increased due to compression in the steam compressor 28 is exhausted from the high-pressure turbine 3 by the superheater 34 </ b> A. Since it is used for the overheating of the generated steam, the amount of heat of the warm drainage discharged from the condenser 11 to the sea can be reduced as in the first embodiment. Therefore, the thermal efficiency in the boiling water nuclear power plant 1B of the reheat cycle can be further improved.

  The power plant of Example 4 which is another Example of this invention is demonstrated using FIG. The power plant of the present embodiment is a boiling water nuclear power plant 1C.

  The boiling water nuclear power plant 1C has a configuration in which the steam supply pipe 31 is connected to the main steam pipe 6 between the high pressure turbine 3 and the moisture separator 4 in the boiling water nuclear power plant 1 of the first embodiment. . The other configuration of the boiling water nuclear power plant 1C is the same as that of the boiling water nuclear power plant 1.

  A different part from the boiling water nuclear power plant 1 is demonstrated. The extraction point where the steam supply pipe 31 is connected to the main steam pipe 6 is the same position as the extraction point where the extraction pipe 21 is connected to the main steam pipe 6 in the axial direction of the main steam pipe 6, and It exists in a position deviating from the latter bleed point in the direction. The steam supply pipe 31 may be connected to the extraction pipe 21.

  The steam extracted from the main steam pipe 6 between the high-pressure turbine 3 and the moisture separator 4 by the steam supply pipe 31 is supplied to the steam compressor 28 of the steam compressor 27 through the steam supply pipe 31, and the steam compressor 28. Compressed by. The steam whose temperature has increased due to this compression is supplied to the superheater 34A through the steam supply pipe 32 as in the first embodiment, and superheats the steam exhausted from the high-pressure turbine 3. The temperature of the steam discharged from the steam compressor 28 is raised to a predetermined temperature by adjusting the rotation speed of the driving device 29.

  In the present embodiment, not the steam extracted from the main steam pipe 6 and the high-pressure turbine 3 upstream from the high-pressure turbine 3, but the steam used to drive the turbine by the high-pressure turbine 3 is used for the high-pressure turbine 3 and the moisture separator 4. The air is extracted from the main steam pipe 6 between them and compressed by the steam compressor 28 to be in a high temperature and high pressure state and supplied to the superheater 34A.

  In this embodiment, the heating steam supplied to the moisture separation superheater is extracted from the main steam pipe 6 upstream of the high-pressure turbine 3 and the high-pressure turbine 3 as in a conventional boiling water nuclear power plant. Therefore, the steam conventionally used for heating in the moisture separation superheater can be supplied to the high-pressure turbine 3. In the boiling water nuclear power plant 1C of the present embodiment, the amount of steam supplied to the high pressure turbine 3 is increased as compared with the conventional boiling water nuclear power plant. Therefore, the amount of work by steam in the high-pressure turbine 3 increases, and the electrical output can be improved.

  However, in this embodiment, since the steam compressed by the steam compressor 28 is extracted by the main steam pipe 6 between the high pressure turbine 3 and the moisture separator 4, the low pressure turbine 5 </ b> A is equivalent to the amount of the extracted steam. , 5B, and 5C are reduced, and the work of steam in each low-pressure turbine is reduced. For this reason, in this embodiment, the degree of improvement in electrical output is lower than that in the first embodiment. Since the steam exhausted from the high-pressure turbine 3 is extracted and supplied to the steam compressor 28, the amount of work in the high-pressure turbine 3 is increased as compared with the third embodiment. The electrical output of the present embodiment is greater than that of the third embodiment.

  In the present embodiment, the steam extracted from the main steam pipe 6 between the high-pressure turbine 3 and the moisture separator 4 is supplied to the steam compressor 28. Therefore, the temperature of the steam supplied to the steam compressor 28 is In Example 1, the temperature is higher than the temperature of the steam supplied to the steam compressor 28. Therefore, similarly to the third embodiment, the flow rate of the extracted steam supplied to the steam compressor 28 in this embodiment can be reduced, and the work amount in the low-pressure turbine can be increased correspondingly.

  In the present embodiment, similar to the first embodiment, the amount of heat of the hot drainage discharged from the condenser 11 to the sea can be reduced, and the thermal efficiency in the boiling water nuclear power plant 1C of the reheat cycle is further improved. be able to.

  The power plant of Example 5 which is another Example of this invention is demonstrated using FIG. The power plant of the present embodiment is a boiling water nuclear power plant 1D.

  The boiling water nuclear power plant 1D has a configuration in which the moisture separation superheater 33 in the boiling water nuclear power plant 1 of the first embodiment is replaced with a moisture separation superheater 33A. The other configuration of the boiling water nuclear power plant 1D is the same as that of the boiling water nuclear power plant 1.

  A different part from the boiling water nuclear power plant 1 is demonstrated. The moisture separation superheater 33A has a configuration in which another stage of superheater 34B is added to the moisture separation superheater 33. For this reason, the moisture separation superheater 33A includes the moisture separator 4 and the superheaters 34A and 34B. The superheater 34B is installed in the main steam pipe 6 downstream of the superheater 34A and upstream of the low pressure turbine. Because of the installation of the superheater 34B, an extraction pipe 38 and a drain pipe 39 are provided. The extraction pipe 38 connected to the main steam pipe 6 upstream from the high-pressure turbine 3 is connected to a plurality of heat transfer pipes of the superheater 34B. A drain pipe 39 connected to these heat transfer tubes is connected to the first high-pressure feed water heater 16A. A region outside the heat transfer tube in the superheater 34 </ b> B is connected to the main steam pipe 6.

  In the present embodiment, steam extracted from the third extraction point of the low-pressure turbine 5B having high wetness that has worked in the high-pressure turbine 3 and the low-pressure turbine 5B is supplied to the steam compressor 28 by the steam supply pipe 31 and compressed. Is done. The superheated steam that has been compressed by the steam compressor 28 and whose temperature has risen is supplied through the steam supply pipe 32 into the heat transfer pipe of the superheater 34A. The temperature of the superheated steam is higher than the temperature of the steam exhausted from the high-pressure turbine 3, but is lower than the temperature of the steam supplied to the high-pressure turbine 3 through the main steam pipe 6. The steam exhausted from the high-pressure turbine 3 and the moisture removed by the moisture separator 4 is supplied into the body of the superheater 34A and is superheated by the superheated steam supplied by the steam supply pipe 32. The steam superheated by the superheater 34A is superheated by the higher temperature steam guided by the extraction pipe 38 in the superheater 34B, and the temperature further rises. The steam superheated by the superheater 34B is supplied to the low pressure turbines 5A, 5B, 5C. The steam supplied to the superheater 34B by the extraction pipe 38 is condensed by superheating the steam exhausted from the superheater 34A, and becomes drain water. This drain water is guided to the first high-pressure feed water superheater 16A through the drain pipe 39 and used for heating the feed water.

  In this embodiment, steam supplied to a first stage superheater located upstream of a conventional boiling water nuclear power plant provided with a moisture separator and a moisture separation superheater having two stages of superheaters. Need not be extracted from the high-pressure turbine 3. In the boiling water nuclear power plant 1D, the steam that has worked in the high-pressure turbine 3 and the low-pressure turbine 5B is supplied to the superheater 34A located upstream by increasing the temperature by compression in the steam compressor 28.

  In the present embodiment, the steam extracted from the high-pressure turbine 3 for supplying to the superheater located upstream in the conventional boiling water nuclear power plant is disposed at the subsequent stage from the extraction point of the high-pressure turbine 3. Can be supplied to blades and low pressure turbines. For this reason, the work amount in the high pressure turbine 3 and each low pressure turbine increases, and the electrical output in the boiling water nuclear power plant 1D improves.

  The reason will be specifically described below. Even when a one-stage superheater is provided as in JP-A-2005-299644 and JP-A-7-189609, the required heat transfer area of the superheater is the superheater 34A of this embodiment. , 34B is equal to the total heat transfer area. For this reason, the amount of steam (steam extracted from the main steam pipe upstream from the high-pressure turbine) supplied to the one-stage superheater described in these publications is supplied to the superheater 34B in this embodiment. More than the amount of steam. The superheaters 34A and 34B used in the present embodiment correspond to dividing the one-stage superheater described in each publication into two. In this embodiment, the steam extracted and compressed from the low pressure turbine is supplied to the superheater 34A, so that the high pressure turbine 3 is more than the system described in Japanese Patent Application Laid-Open No. 2005-299644 and Japanese Patent Application Laid-Open No. 7-189609. The amount of steam supplied increases, and the amount of work in the high-pressure turbine 3 increases.

  Regardless of the size of the heat transfer area, regardless of whether the superheater is installed in one or two stages, in the case of one or two types of steam to be heated, the main steam that is the working fluid is at the superheater outlet. The degree of superheat of the temperature is different. That is, two types of extraction steam (steam compressed by the steam compressor 28 and steam extracted by the extraction pipe 38) having different temperatures are separately supplied to the two-stage superheaters (superheaters 34A and 34B). When the main steam is heated by these superheaters, the superheat temperature of the main steam discharged from the subsequent superheater is described in Japanese Patent Application Laid-Open Nos. 2005-299644 and 7-189609. It becomes higher than the superheat temperature of the steam discharged from the stage superheater. As a result, the thermal efficiency in the present embodiment is improved. In the present embodiment, the superheat temperature of the main steam exhausted from the superheater 34B becomes high, so the work amount in the low pressure turbines 5A, 5B, 5C increases.

  Also in this embodiment, the steam extracted from the low-pressure turbine 5B is compressed by the steam compressor 28 and supplied to the superheater 34A. Therefore, the amount of heat of the warm waste water discharged to the sea can be reduced, and the boiling water type of the reheat cycle is used. The thermal efficiency in the nuclear power plant 1D can be further improved.

  In the present embodiment and later-described embodiments 6, 7, 8 and 9, the steam supply pipe 31 is connected to the steam exhaust passage 37 instead of the low-pressure turbine, and the steam discharged from the low-pressure turbine to the condenser is steam-compressed. You may supply to a machine.

  A power plant according to embodiment 6, which is another embodiment of the present invention, will be described with reference to FIG. The power plant of the present embodiment is a boiling water nuclear power plant 1E.

  The boiling water nuclear power plant 1E has a configuration in which the vapor compression device 27 in the boiling water nuclear power plant 1D of the fifth embodiment is replaced with a vapor compression device 27A. The other configuration of the boiling water nuclear power plant 1E is the same as that of the boiling water nuclear power plant 1D.

  A different part from the boiling water nuclear power plant 1D is demonstrated. The steam compressor 27A has a two-stage steam compressor 28, that is, steam compressors 28A and 28B, a drive device 29, and control valves 30A and 30B. The vapor compressors 28A and 28B are connected to the drive device 29 by a common rotating shaft. A steam inlet of the steam compressor 28 </ b> A is connected to the steam supply pipe 31. A steam supply pipe 32A provided with a control valve 30A connects the steam outlet of the steam compressor 28A and the plurality of heat transfer tubes of the superheater 34A. The connecting pipe 40 connected to the steam outlet of the steam compressor 28A is connected to the steam inlet of the steam compressor 28B. A steam supply pipe 32B provided with a control valve 30B connects the steam outlet of the steam compressor 28B and the plurality of heat transfer tubes of the superheater 34B.

  The vapor compressors 28A and 28B are rotated by a driving device 29. Steam generated in the nuclear reactor 2 and worked in the high pressure turbine 3 and the low pressure turbine 5B is extracted from the third extraction point of the low pressure turbine 5B and supplied to the steam compressor 28A through the steam supply pipe 31. A part of the steam whose temperature has been increased by being compressed by the steam compressor 28A is supplied to the plurality of heat transfer tubes of the superheater 34A through the steam supply tube 32A. The steam exhausted from the high-pressure turbine 3 and moisture removed by the moisture separator 4 is superheated by the superheater 34A by the steam supplied by the steam supply pipe 32A. The temperature of the steam compressed by the steam compressor 28 </ b> A is higher than the temperature of the steam exhausted from the high-pressure turbine 3.

  The remainder of the steam compressed by the steam compressor 28A is supplied to the steam compressor 28B through the connecting pipe 40 and further compressed by the steam compressor 28B. The temperature of the steam compressed by the steam compressor 28B is higher than the temperature of the steam exhausted from the steam compressor 28A, and is about the same as the temperature of the steam supplied to the high-pressure turbine 3. The steam whose temperature is further increased by being compressed by the steam compressor 28B is guided to the plurality of heat transfer tubes of the superheater 34B by the steam supply tube 32B. The steam exhausted from the superheater 34A is superheated by the steam supplied from the steam supply pipe 32B in the superheater 34B, and the temperature further rises. The steam superheated by the superheater 34B is supplied to each low-pressure turbine.

  Since the steam compressor 27A is installed in the present embodiment, the steam supplied to the superheaters 34A and 34B is extracted from the third extraction point of the low-pressure turbine 5B, and work is performed in the high-pressure turbine 3 and the low-pressure turbine 5B. Steam is used. For this reason, it is not necessary to extract steam as a heating source for the superheaters 34A and 34B from the main steam pipe 6 upstream of the high-pressure turbine 3 and the high-pressure turbine 3, so that steam supplied to the high-pressure turbine 3 and each low-pressure turbine is supplied. The flow rate can be increased in the same manner as in the first embodiment. In the present embodiment, each effect produced in the first embodiment can be obtained.

  By adjusting the opening degree of the control valve 30A, the steam compression ratio by the steam compressor 28A can be adjusted, and the temperature of the steam obtained by the steam compressor 28A can be adjusted. By adjusting the opening degree of the control valve 30B, the steam compression ratio by the steam compressor 28B can be adjusted, and the temperature of the steam obtained by the steam compressor 28B can be adjusted.

  A power plant according to embodiment 7, which is another embodiment of the present invention, will be described with reference to FIG. The power plant of the present embodiment is a boiling water nuclear power plant 1F.

  The boiling water nuclear power plant 1F has a configuration in which the moisture separation superheater 33A is replaced with a moisture separation superheater 33B and the vapor compression device 27 is replaced with a vapor compression device 27B in the boiling water nuclear power plant 1D of the fifth embodiment. Have The other structure of the boiling water nuclear power plant 1F is the same as that of the boiling water nuclear power plant 1D.

  A different part from the boiling water nuclear power plant 1D is demonstrated. The moisture separation superheater 33B has a configuration in which another stage of the superheater 34C is added to the moisture separation superheater 33A. As a result, the moisture separator superheater 33B includes the moisture separator 4 and three stages of superheaters (superheaters 34A, 34B, 34C). The superheater 34C is installed in the main steam pipe 6 downstream of the superheater 34B and upstream of the low-pressure turbine. A drain pipe 41 connected to the plurality of heat transfer tubes of the superheater 34C is connected to the first high-pressure feed water heater 16A. A plurality of heat transfer tubes connected to the main steam pipe 6 are also provided in the superheater 34C.

  The vapor compressor 27B has a configuration in which another vapor compressor 28C is added to the vapor compressor 27A. The steam compressor 28C is connected to the rotation shaft of the steam compressor 28B. The connecting pipe 40A connected to the steam outlet of the steam compressor 28B is connected to the steam inlet of the steam compressor 28C. A steam supply pipe 32C provided with a control valve 30C connects the steam outlet of the steam compressor 28C and the plurality of heat transfer pipes of the superheater 34C. A drain pipe 41 connects the trunk side of the superheater 34C and the first high-pressure feed water superheater 16A.

  In the present embodiment, as in the sixth embodiment, the steam extracted from the third extraction point of the low-pressure turbine 5B is compressed by the steam compressor 28A and further compressed by the steam compression 28B. A part of the steam that has been compressed by the steam compressor 28A and whose temperature has risen is supplied to the superheater 34A through the steam supply pipe 32A. A part of the steam which has been compressed by the steam compressor 28B and whose temperature has further increased is supplied to the superheater 34B through the steam supply pipe 32B. The remaining steam exhausted from the steam compressor 28B is supplied to the steam compressor 28C through the connecting pipe 40A and compressed, and the temperature further rises. The steam exhausted from the steam compressor 28C is supplied to the plurality of heat transfer tubes of the superheater 34C through the steam supply tube 32C. The steam superheated by the superheater 34B is superheated by the superheater 34C through the steam supply pipe 32C and supplied to each low-pressure turbine. The steam compressed by the steam compressors 28A, 28B, and 28C has a higher temperature in the order of the steam compressors 28A, 28B, and 28C. The temperature of the steam exhausted from the steam compressor 28C becomes the highest.

  Also in this embodiment, each effect produced in the sixth embodiment can be obtained. In this embodiment, the steam from which moisture has been removed by the moisture separator 4 is superheated by the three-stage superheaters 34A, 34B, and 34C, so that the steam supplied to the low-pressure turbine is compared with that in the sixth embodiment. The superheat temperature can be increased. For this reason, in a present Example, the efficiency of a reheat cycle can be improved.

  The power plant of Example 8 which is another Example of this invention is demonstrated using FIG. The power plant of the present embodiment is a boiling water nuclear power plant 1G.

  In the boiling water nuclear power plant 1G, in the boiling water nuclear power plant 1F of the seventh embodiment, the steam compressor 27B is replaced with the steam compressor 27A, and the superheater 34C is connected to the main steam pipe 6 upstream from the high pressure turbine 3. It has a configuration. The other configuration of the boiling water nuclear power plant 1G is the same as that of the boiling water nuclear power plant 1F.

  A different part from the boiling water nuclear power plant 1F is demonstrated. In this embodiment, the superheater 34A is supplied with steam compressed by the steam compressor 28A, the superheater 34B is supplied with steam compressed by the steam compressor 28B, and the superheater 34C is supplied with a bleed pipe 38 from the high pressure turbine 3. The steam extracted from the upstream main steam pipe 6 is supplied, and the steam exhausted from the high-pressure turbine 3 and the moisture removed by the moisture separator 4 is successively superheated.

  Also in this embodiment, each effect produced in the seventh embodiment can be obtained. In the present embodiment, the steam extracted from the main steam pipe 6 upstream of the high-pressure turbine 3 is supplied to the superheater 34C through the extraction pipe 38 in the same manner as in the fifth embodiment, so that the steam is supplied to the high-pressure turbine 3 and the low-pressure turbine. The flow rate of the generated steam is reduced as compared with the seventh embodiment. For this reason, the work amount in the high-pressure turbine 3 and the low-pressure turbine in the present embodiment is lower than that in the seventh embodiment. However, in the present embodiment, as in the fifth embodiment, the steam extracted from the high pressure turbine 3 for supplying to the superheater located upstream in the conventional boiling water nuclear power plant is used as the extraction point of the high pressure turbine 3. It can supply to each moving blade located in a later stage, and a low-pressure turbine. For this reason, the work amount in the high-pressure turbine 3 and each low-pressure turbine increases, and the electrical output in the boiling water nuclear power plant 1G is improved as compared with the conventional boiling water nuclear power plant.

  A power plant according to embodiment 9, which is another embodiment of the present invention, will be described with reference to FIG. The power plant of the present embodiment is a boiling water nuclear power plant 1H.

  The boiling water nuclear power plant 1 </ b> H has a configuration in which the steam compressor 27 </ b> A is replaced with the steam compressor 27 in the boiling water nuclear power plant 1 </ b> G of Example 8 and the superheater 34 </ b> B is connected to the extraction point of the high-pressure turbine 3. The other configuration of the boiling water nuclear power plant 1H is the same as that of the boiling water nuclear power plant 1G.

  A different part from the boiling water nuclear power plant 1G is demonstrated. The extraction pipes 42 connected to the plurality of heat transfer tubes of the superheater 34 </ b> B are connected to the extraction point of the high-pressure turbine 3.

  In this embodiment, the superheater 34A has steam compressed by the steam compressor 28, the superheater 34B has steam extracted from the high-pressure turbine 3 by the extraction pipe 42, and the superheater 34C has high pressure by the extraction pipe 38. The steam extracted from the main steam pipe 6 upstream of the turbine 3 is supplied, and the steam exhausted from the high-pressure turbine 3 and removed from the moisture by the moisture separator 4 is successively superheated.

  In the present embodiment, the steam extracted from the low-pressure turbine 5B is compressed by the steam compressor 28 to increase the temperature and supplied to the superheater 34A. The thermal efficiency of the boiling water nuclear power plant 1H in the heat cycle can be further improved as compared with the boiling water nuclear power plant 1D.

  An increase in electrical output in the power plant can be achieved by increasing either the flow rate of steam supplied from the steam generator to the turbine and the thermal efficiency of the power plant. In the present embodiment, the flow rate of the steam supplied to the high-pressure turbine 3 remains the same, and the superheat temperature of the steam exhausted from the last stage superheater 34C by the three stage superheaters (superheaters 34A, 34B, 34C). Can be raised. As a result, the thermal efficiency is improved by the reheat cycle, and the electrical output of the boiling water nuclear power plant 1H is improved.

  The power plant of Example 10 which is another Example of this invention is demonstrated using FIG. The power plant of the present embodiment is a boiling water nuclear power plant 1J.

  The boiling water nuclear power plant 1J has a configuration in which the vapor compression device 27 in the boiling water nuclear power plant 1 of the first embodiment is replaced with a vapor compression device 27C. The other configuration of the boiling water nuclear power plant 1J is the same as that of the boiling water nuclear power plant 1.

  A different part from the boiling water nuclear power plant 1 is demonstrated. The vapor compression device 27C includes a two-stage vapor compressor 28, that is, vapor compressors 28A and 28B, a drive device 29, a control valve 30, and condensers 43A and 43B. The vapor compressors 28A and 28B are connected to the drive device 29 by a common rotating shaft. A steam inlet of the steam compressor 28 </ b> A is connected to the steam supply pipe 31. The connecting pipe 40 connected to the steam outlet of the steam compressor 28A is connected to the steam inlet of the steam compressor 28B. A condenser 43 </ b> A and a mist separator 48 are provided in the communication pipe 40, and the condenser 43 </ b> A is located upstream of the mist separator 48. The condenser 43B is connected to a steam discharge pipe 49 connected to the steam outlet of the steam compressor 28B. A saturated water supply pipe 51 provided with the control valve 30 is connected to the bottom of each of the condensers 43A and 43B, and further connected to the superheater 34A. A pump 50 is provided in the saturated water supply pipe 51.

  A heat transfer pipe 44A installed in the condenser 43A is connected to a cooling water supply pipe 45A provided with a pump 47A and a cooling water discharge pipe 46A. A heat transfer pipe 44B installed in the condenser 43B is connected to a cooling water supply pipe 45B provided with a pump 47B and a cooling water discharge pipe 46B.

  The vapor compressors 28A and 28B are rotated by a driving device 29. Steam generated in the nuclear reactor 2 and working in the high pressure turbine 3 and the low pressure turbine 5B is extracted from the third extraction point of the low pressure turbine and supplied to the steam compressor 28A through the steam supply pipe 31. The steam whose temperature has been increased by being compressed by the steam compressor 28 </ b> A is guided to the condenser 43 </ b> A through the connection pipe 40. The pump 47A is driven, and the cooling water is supplied to the heat transfer pipe 44A through the cooling water supply pipe 45A. A part of the steam that has flowed into the condenser 43A is condensed by the cooling water flowing in the heat transfer tube 44A, and falls to the bottom of the condenser 43A as saturated water. The temperature of the cooling water in the heat transfer pipe 44A rises and is discharged to the cooling water discharge pipe 46A. The pressure on the trunk side which is the outer region of the heat transfer tube 44A of the condenser 43A is the pressure of the steam compressed by the steam compressor 28A. For this reason, the temperature of the saturated water accumulated at the bottom of the condenser 43A is a temperature commensurate with the vapor pressure.

  The steam that has not been condensed by the condenser 43A is guided to the mist separator 48 through the communication pipe 40, and the mist contained in the steam is removed by the mist separator 48. The steam exhausted from the mist separator 48 is compressed by the steam compressor 28B, and the temperature further rises. The steam compressed by the steam compressor 28B is guided to the condenser 43B. The pump 47B is driven, and the cooling water is supplied to the heat transfer pipe 44B through the cooling water supply pipe 45B. The steam that has flowed into the condenser 43B is condensed by the cooling water flowing in the heat transfer tube 44B, and falls as saturated water to the bottom of the condenser 43B. The temperature of the cooling water in the heat transfer pipe 44B rises and is discharged to the cooling water discharge pipe 46B. The pressure on the trunk side, which is the outer region of the heat transfer tube 44B, of the condenser 43B is the pressure of the steam compressed by the steam compressor 28B. For this reason, the temperature of the saturated water accumulated at the bottom of the condenser 43B is a temperature commensurate with the vapor pressure.

  The high-temperature saturated water generated in the condensers 43A and 43B is supplied to the superheater 34A through the saturated water supply pipe 51 by driving the pump 50, and the moisture from which moisture has been removed by the moisture separator 4 is supplied. Heat.

  In the present embodiment, each effect produced in the first embodiment can be obtained. In this embodiment, the saturated water boosted by the pump 50 is supplied to the superheater 34A, so that the power of the drive device 29 is made extremely small as compared with the first to ninth embodiments in which compressed steam is supplied to the superheater. Can do. This can reduce the total in-house power consumed by the drive device 29 and the pumps 47A, 47B, 50 of the present embodiment, compared to the in-house power consumed by each drive device 29 of the first to ninth embodiments.

  In the present embodiment, the steam supply pipe 31 is not a low-pressure turbine but any of a steam discharge passage 37, an extraction point formed in the high-pressure turbine, and a main steam pipe 6 between the high-pressure turbine 3 and the moisture separator 4. You may connect. Further, the superheater that heats the steam discharged from the high-pressure turbine 3 is arranged in two stages, the saturated water in the condenser 43A is used as the upstream superheater, and the hotter saturated water in the condenser 43B is used as the downstream side. You may supply to a superheater. When this superheater has three stages, the steam compressor 28C shown in Example 7 is further provided, and the steam compressed by the steam compressor 28C and further increased in temperature is compressed by another condenser and saturated. You may make it into water and supply this saturated water to the 3rd stage superheater.

  The power plant of Example 11 which is another Example of this invention is demonstrated using FIG. The power plant of the present embodiment is a thermal power plant 1K.

  The thermal power plant 1K has a configuration in which the nuclear reactor 1 in the boiling water nuclear power plant 1 of the first embodiment is replaced with a boiler 52 that is a steam generator. Other configurations of the thermal power plant 1K are the same as those of the boiling water nuclear power plant 1.

  A different part from the boiling water nuclear power plant 1 is demonstrated. In the thermal power plant 1 </ b> K, the main steam pipe 6 connected to the high-pressure turbine 3 is connected to the boiler 52, and the water supply pipe 15 is connected to the boiler 52. The saturated steam generated in the boiler 52 passes through the main steam pipe 6 and the high-pressure turbine 3 and the low-pressure turbines 5A, 5B. Supplied to 5C. The water supply is supplied to the boiler 52 through the water supply pipe 15. The thermal power plant 1 </ b> K includes a boiler 52, a main steam system and a feed water system used in the boiling water nuclear power plant 1, and a steam compression device 27.

  Such a present Example can also obtain each effect which arises in Example 1. FIG. In the second to tenth embodiments, the nuclear reactor 2 may be replaced with the boiler 52, and the second to tenth embodiments may be applied to a thermal power plant.

  A power plant according to embodiment 12, which is another embodiment of the present invention, will be described with reference to FIG. The power plant of the present embodiment is a pressurized water nuclear power plant 1L which is a kind of nuclear power plant.

  The pressurized water nuclear power plant 1L has a configuration in which the vapor compression device 27 in the boiling water nuclear power plant 1 of the first embodiment is replaced with a vapor compression device 27C. The other configuration of the pressurized water nuclear power plant 1L is the same as that of the boiling water nuclear power plant 1.

  The pressurized water nuclear power plant 1L of the present embodiment includes a nuclear reactor 2A, a steam generator (steam generator) 53, a primary cooling system pipe 55, a main steam system and a feed water system used in the boiling water nuclear power plant 1, and A vapor compression device 27 is provided. The main steam system includes the high-pressure turbine 3, the low-pressure turbines 5A, 5B, and 5C, the main steam pipe 6, the moisture separation superheater 33, and the condenser 11 shown in FIG. The feed water system includes the feed water pipe 15, the high pressure feed water heaters 16A and 16B, the low pressure feed water heaters 17A to 17D, the extraction pipes 20 to 25, and the drain pipes 26 and 35 shown in FIG.

  The steam generator 53 is connected to the nuclear reactor 2 </ b> A by a primary cooling system pipe 55 that forms a cooling water circulation loop. A circulation pump 54 is provided in the primary cooling system pipe 55. The main steam pipe 6 and the water supply pipe 15 are connected to the steam generator 53. The steam compressor 28 of the steam compressor 27 is connected to the third extraction point of the low-pressure turbine 5B by the steam supply pipe 31.

  A plurality of heat transfer tubes (not shown) are installed in the fuselage of the steam generator 53 through the primary cooling system piping 55 by the high-temperature cooling water heated by the core in the nuclear reactor 2 </ b> A by driving the circulation pump 54. )). This high-temperature cooling water heats the feed water supplied to the outside of the heat transfer tube within the body of the steam generator 53. The feed water is supplied from the feed water pipe 15 and becomes steam by heating with high-temperature cooling water. The cooling water whose temperature has been reduced by heating the feed water is returned to the reactor 2 </ b> A through the primary cooling system pipe 55.

  The steam extracted from the low-pressure turbine 5B is supplied to the steam compressor 28 through the steam supply pipe 31 and compressed. The steam (superheated steam) whose temperature has been increased by compression is supplied to the superheater 34 </ b> A and superheats the steam discharged from the moisture separator 4. The steam superheated by the superheater 34A is supplied to each low-pressure turbine.

  In the present embodiment, each effect produced in the first embodiment can be obtained.

  In the second to tenth embodiments, the nuclear reactor 2 may be replaced with the steam generator 53, and the second to tenth embodiments may be applied to a pressurized water nuclear power plant.

  A power plant according to embodiment 13, which is another embodiment of the present invention, will be described with reference to FIG. The power plant of the present embodiment is a fast breeder reactor nuclear power plant 1M which is a kind of nuclear power plant.

  The fast breeder reactor nuclear power plant 1M includes a fast breeder reactor 56, an intermediate heat exchanger 57, a primary circulation pump 58, a primary cooling system pipe 59, a steam generator (steam generator) 60, a secondary circulation pump 61, and a secondary cooling. The system pipe 62, the main steam system and the water supply system used in the boiling water nuclear power plant 1, and the steam compression device 27 are provided. The main steam system includes the high-pressure turbine 3, the low-pressure turbines 5A, 5B, and 5C, the main steam pipe 6, the moisture separation superheater 33, and the condenser 11 shown in FIG. The feed water system includes the feed water pipe 15, the high pressure feed water heaters 16A and 16B, the low pressure feed water heaters 17A to 17D, the extraction pipes 20 to 25, and the drain pipes 26 and 35 shown in FIG. In FIG. 13, the feed water heaters other than the low pressure turbines 5A and 5C, the first high pressure feed water heater 16A provided in the main steam system and the feed water system (see FIG. 1) of the boiling water nuclear power plant 1 are shown. The trachea and each drain pipe are omitted.

  A primary cooling system pipe 59 connects the fast breeder reactor 56, the intermediate heat exchanger 57, the primary circulation pump 58 and the fast breeder reactor 56 in this order, and the primary coolant (for example, liquid sodium) is a closed loop of the primary cooling system. Form. The secondary cooling system pipe 62 connects the intermediate heat exchanger 57, the steam generator 60, the secondary circulation pump 61, and the intermediate heat exchanger 57 in this order, and forms a closed loop of the secondary cooling system. The main steam pipe 6 and the water supply pipe 15 are connected to the steam generator 60. The steam compressor 28 of the steam compressor 27 is connected to the third extraction point of the low-pressure turbine 5B by the steam supply pipe 31.

  By driving the primary circulation pump 57, the primary coolant (for example, liquid sodium) heated in the core in the fast breeder reactor 56 is guided to the intermediate heat exchanger 57 through the primary cooling system pipe 59. The high temperature primary system coolant heats the secondary system coolant (for example, liquid sodium) supplied from the secondary cooling system piping 62 in the intermediate heat exchanger 57. The primary coolant whose temperature has decreased is returned to the fast breeder reactor 56. By driving the secondary circulation pump 61, the secondary system coolant heated by the intermediate heat exchanger 57 is guided to the steam generator 60 through the secondary cooling system pipe 62. The feed water supplied through the feed water pipe 15 is heated by the secondary coolant in the steam generator 60 to become steam.

  The steam generated by the steam generator 60 is supplied to the high-pressure turbine 3 and the low-pressure turbines 5A, 5B, and 5C through the main steam pipe 6 as in the boiling water nuclear power plant 1. The steam exhausted from the low-pressure turbine is condensed by the condenser 11 to become water. As in the case of the boiling water nuclear power plant 1, this water passes through the water supply pipe 15 and is heated by each of the water heaters 1 in order to increase the temperature, and at a set temperature, the steam generator 60. To be supplied.

  Also in the present embodiment, similarly to the boiling water nuclear power plant 1, the steam extracted from the third extraction point of the low-pressure turbine 5B is compressed by the steam compressor 28 and the temperature rises to become superheated steam. It is supplied to the superheater 34A. This superheated steam superheats the steam discharged from the moisture separator 4 in the superheater 34A. The steam superheated by the superheater 34A is supplied to each low-pressure turbine.

  In the present embodiment, each effect produced in the first embodiment can be obtained.

  In the second to tenth embodiments, the nuclear reactor 2 may be replaced with the steam generator 60, and the second to tenth embodiments may be applied to a fast breeder reactor nuclear power plant.

  A power plant according to embodiment 14 which is another embodiment of the present invention will be described with reference to FIG. The power plant of the present embodiment is a thermal power plant. The present embodiment is specifically a thermal combined power plant 1N.

  The thermal combined power plant 1N includes a gas turbine power plant and a steam power plant. The gas turbine power plant includes a compressor 64, a gas turbine 65, a combustor 66, and a generator 67. The compressor 64, the gas turbine 65, and the generator 67 are connected by a single rotating shaft. A combustion air pipe 68 is connected to the air inlet of the compressor 64, and further connects the air outlet of the compressor 64 and the combustor 66. The combustor 66 is connected to the gas turbine 65 by piping. The steam power plant has a configuration in which the nuclear reactor 2 is replaced with a steam generator (steam generating device) 63 in the boiling water nuclear power plant 1 of the first embodiment. The main steam pipe 6 and the water supply pipe 15 are connected to the steam generator 63. An exhaust gas pipe 70 connected to the exhaust gas outlet of the gas turbine 65 is connected to the steam generator 63.

  The combustion air supplied from the combustion air pipe 68 is compressed by the compressor 64 and supplied into the combustor 66. The fuel supplied from the fuel supply pipe 69 into the combustor 66 is burned in the combustor 66. The generated high-temperature and high-pressure combustion gas is supplied to the gas turbine 65 to rotate the gas turbine 65. The generator 67 also rotates and generates electric power. The high temperature exhaust gas discharged from the gas turbine 65 is guided to the steam generator 63 through the exhaust gas pipe 70 and heats the feed water supplied to the steam generator 63 through the feed water pipe 15. This water supply is heated to steam. The steam generated by the steam generator 63 is supplied to the high-pressure turbine 3 and the low-pressure turbines 5A, 5B, and 5C through the main steam pipe 6 as in the boiling water nuclear power plant 1. The steam exhausted from the low-pressure turbine is condensed by the condenser 11 to become water. As with the boiling water nuclear power plant 1, this water is supplied to the steam generator 63 in a state where it passes through the water supply pipe 15 and is heated sequentially by each of the water heaters to increase the temperature. Supplied.

  Also in the present embodiment, similarly to the boiling water nuclear power plant 1, the steam extracted from the third extraction point of the low-pressure turbine 5B is compressed by the steam compressor 28 and the temperature rises to become superheated steam. It is supplied to the superheater 34A. This superheated steam superheats the steam discharged from the moisture separator 4 in the superheater 34A. The steam superheated by the superheater 34A is supplied to each low-pressure turbine.

  In the present embodiment, each effect produced in the first embodiment can be obtained.

  In the second to tenth embodiments, the reactor 2 may be replaced with the steam generator 63, and the second to tenth embodiments may be applied to a thermal combined power plant.

  The present invention can be applied to nuclear power plants such as boiling water nuclear power plants and pressurized water nuclear power plants, and power plants such as thermal power plants.

  1, 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1J ... boiling water nuclear power plant, 1K ... thermal power plant, 1L ... pressurized water nuclear power plant, 1M ... fast breeder reactor nuclear power plant, 1N: Thermal power combined power plant, 2, 2A ... Reactor, 3 ... High pressure turbine, 4 ... Moisture separator, 5A, 5B, 5C ... Low pressure turbine, 6 ... Main steam pipe, 11 ... Condenser, 15 ... Water supply Piping, 16A ... 1st high pressure feed water heater, 16B ... 2nd high pressure feed water heater, 17A ... 3rd low pressure feed water heater, 17B ... 4th low pressure feed water heater, 17C ... 5th low pressure feed water heater, 17D ... 1st 6 low-pressure feed water heater, 19 ... feed pump, 20, 21, 22, 23, 24, 25, 38 ... bleed pipe, 26, 35, 39, 41 ... drain pipe, 27, 27A, 27B, 27C ... steam compressor , 28 28A, 28B, 28C ... Steam compressor, 29 ... Drive unit, 31, 32, 32A, 32B, 32C ... Steam supply pipe, 33, 33A, 33B ... Moisture separation superheater, 34, 34A, 34B, 34C ... Superheat , 43A, 43B ... condenser, 52 ... boiler, 53, 60 ... steam generator, 56 ... fast breeder reactor, 65 ... gas turbine, 66 ... combustor.

Claims (10)

  A first turbine to which the steam is sequentially supplied by a main steam pipe connected to a steam generator for generating steam, a second turbine having a lower pressure than the first turbine, and between the first turbine and the second turbine A main steam system including a moisture separator and a superheater having a moisture separator and at least one superheater, and a condenser for condensing the steam exhausted from the second turbine. The main steam system formed downstream of the first stage blades of the first turbine, the water supply pipe connecting the condenser and the steam generator, the steam compressor for compressing the steam, and A first steam supply pipe that is connected to the steam compression device and guides the steam extracted from the extraction position, and the steam exhausted from the steam compression device and the moisture separator is directly Supplied Connected to said superheater, power plant, characterized in that a second steam supply pipe for guiding the steam compressed by the steam compression apparatus that.   The extraction position is any one of the first turbine, a main steam pipe between the first turbine and the moisture separator, the second turbine, and a steam exhaust passage connecting the second turbine and the condenser. The power plant according to claim 1, wherein the power plant is formed in a crab. The moisture separation superheater includes, as the superheater, a first superheater and a second superheater disposed downstream of the first superheater,
The steam compressor is connected to the first steam compressor by a first steam compressor connected to the first steam supply pipe, and a connecting pipe for guiding steam compressed by the first steam compressor. Including two steam compressors,
The second steam supply pipe connects the first steam compressor and the first superheater;
The power plant according to claim 1, wherein a third steam supply pipe that is connected to the second steam compressor and guides the steam compressed by the second steam compressor is connected to the second superheater. The moisture separation superheater includes, as the superheater, a first superheater and a second superheater disposed downstream of the first superheater,
The vapor compression device includes a vapor compressor connected to the first vapor supply pipe and compressing the vapor supplied through the first vapor supply pipe;
The second steam supply pipe connects the steam compressor and the first superheater;
The power plant according to claim 1, wherein a pipe connected to the main steam pipe upstream from the first turbine is connected to the second superheater. The moisture separation superheater includes, as the superheater, a first superheater, a second superheater arranged downstream of the first superheater, and a third superheater arranged downstream of the second superheater. Including
The steam compressor is connected to the first steam compressor by a first steam compressor connected to the first steam supply pipe, and a first connecting pipe that guides steam compressed by the first steam compressor. A second steam compressor, and a third steam compressor connected to the second steam compressor by a second connecting pipe for guiding steam compressed by the second steam compressor,
The second steam supply pipe connects the first steam compressor and the first superheater;
A third steam supply pipe connected to the second steam compressor and guiding the steam compressed by the second steam compressor is connected to the second superheater;
The power plant according to claim 1, wherein a fourth steam supply pipe that is connected to the third steam compressor and guides the steam compressed by the third steam compressor is connected to the third superheater. The moisture separation superheater includes, as the superheater, a first superheater, a second superheater disposed downstream of the first superheater, and a third superheater disposed downstream of the second superheater. Including
The steam compressor is connected to the first steam compressor by a first steam compressor connected to the first steam supply pipe, and a connecting pipe for guiding steam compressed by the first steam compressor. Including two steam compressors,
The second steam supply pipe connects the first steam compressor and the first superheater;
A third steam supply pipe connected to the second steam compressor and guiding the steam compressed by the second steam compressor is connected to the second superheater;
The power plant according to claim 1, wherein a pipe connected to the main steam pipe upstream from the first turbine is connected to the third superheater.   A first turbine to which the steam is sequentially supplied by a main steam pipe connected to a steam generator for generating steam, a second turbine having a lower pressure than the first turbine, and between the first turbine and the second turbine A main steam system including a moisture separator and a superheater having a moisture separator and at least one superheater, and a condenser for condensing the steam exhausted from the second turbine. The main steam system formed downstream of the first stage blades of the first turbine, the water supply pipe connecting the condenser and the steam generator, the steam compressor for compressing the steam, and A bleed position, a first supply pipe that is connected to the steam compression device and guides the steam extracted from the bleed position, and a condensing device that condenses the steam compressed by the steam compression device into saturated water And said And a second supply pipe connected to the superheater to which the steam exhausted from the moisture separator is directly supplied and leading the saturated water to the superheater. plant. The moisture separation superheater includes a first superheater and a second superheater arranged downstream of the first superheater as the superheater,
The steam compressor is connected to the first steam compressor by a first steam compressor connected to the first steam supply pipe, and a connecting pipe for guiding steam compressed by the first steam compressor. Including two steam compressors,
As the condensing device, the first condensing device that condenses the steam compressed by the first steam compressor to make saturated water, and the condensing the steam compressed by the second steam compressor to saturated water. A second condensing device is provided,
The second supply pipe connects the first condenser and the first superheater;
The power plant according to claim 7, wherein a third supply pipe that is connected to the second condensing device and guides the saturation in the second condensing device is connected to the second heater.   The power plant according to claim 1 or 7, wherein the power plant is a nuclear power plant or a thermal power plant. The steam generated by the steam generator is sequentially supplied to the first turbine and the second turbine having a lower pressure than the first turbine through the main steam pipe,
The steam exhausted from the first turbine has a moisture separator and at least one superheater, and the moisture separation superheat provided in the main steam pipe between the first turbine and the second turbine. Leading to the moisture separator of the apparatus to remove moisture contained in the vapor;
Heating the steam exhausted from the moisture separator with at least one superheater;
The steam exhausted from the second turbine is condensed in a condenser to generate feed water;
This water supply is supplied to the steam generator through a water supply pipe provided with a water heater,
The main steam system including the main steam pipe, the first turbine, the second turbine, and the condenser is extracted from an extraction position formed downstream of the first stage blades of the first turbine. The steam is compressed with a vapor compression device,
Operation of a power plant, wherein the steam compressed by the steam compressor is supplied as a heating source of the steam to the superheater to which the steam exhausted from the moisture separator is directly supplied. Method.

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