JP6963492B2 - How to operate moisture separation equipment, power plants, and steam turbines - Google Patents

Description

The present invention relates to a moisture separation facility for separating moisture from steam as a working fluid of a steam turbine, a power plant including the facility, and a method for operating a steam turbine.

In a power plant including a steam turbine, the high-pressure turbine is driven by the steam (main steam) generated in the steam generator, and when the main steam is close to saturation, the low-pressure turbine is driven by the steam (cycle steam) discharged from the high-pressure turbine. To drive. By the way, the amount of heat retained in the steam discharged from the high-pressure turbine decreases by working on the high-pressure turbine, which causes a part of the steam to condense to generate moisture (wet steam). Therefore, if the steam discharged from the high-pressure turbine is introduced into the low-pressure turbine as it is, not only the turbine blades of the low-pressure turbine are eroded by the wet steam, but also the thermal efficiency of the turbine is lowered. Therefore, in a power plant that handles wet steam, a moisture separation heater is provided between the high-pressure turbine and the low-pressure turbine. This moisture separation heater separates moisture from the steam discharged from the high-pressure turbine and heats the separated steam to generate superheated steam.

As shown in Patent Document 1, for example, the moisture separation heater of a power generation plant uses a horizontally placed tubular container and steam to be heated (steam discharged from a high-pressure turbine) introduced into the container as main steam. It is equipped with a heater that heats with higher temperature steam such as.

Japanese Patent No. 4848333

In the moisture separation heater disclosed in Patent Document 1, the steam extracted from the high-pressure turbine and the main steam are used as heat sources to heat the steam to be introduced into the low-pressure turbine. Therefore, the temperature of the steam to be introduced into the low-pressure turbine. Is difficult to raise above the temperature of the steam introduced into the high pressure turbine.

The present invention has been made in view of the above circumstances, and contributes to improving the thermal efficiency of the steam turbine by increasing the amount of heat possessed by the working fluid introduced into the steam turbine as the working fluid, and as a result, the power plant. It is an object of the present invention to provide a method of operating a moisture separation facility, a power plant, and a steam turbine, which makes it possible to increase the power generation efficiency of the steam turbine.

The moisture separation equipment according to the present invention is
A moisture separator that separates moisture from steam as the working fluid of a steam turbine,
A steam extraction tube that extracts a part of the steam from which the moisture has been separated from the moisture separator, and
A first heat exchanger that heats the steam by exchanging heat between the steam extracted from the moisture separator and the heating medium through the steam extraction pipe.
A heater for heating the heating medium and a steam introduction pipe for introducing the steam heated by the heat exchanger into the steam turbine as a working fluid are provided.
The steam turbine is a moisture separation facility operated by steam separated by the moisture separator and steam heated by the heat exchanger.
The moisture separator heats a tubular container, a separator that separates moisture from the vapor as the working fluid introduced into the container, and steam separated by the separator. Further provided, a heat exchanger and a steam take-out pipe provided between the separator and the second heat exchanger to obtain a part of the steam whose moisture is separated by the separator.
The steam take-out pipe communicates with the steam extraction pipe .

In the present invention, a part of the steam separated by the moisture separator is extracted from the moisture separator, the extracted steam is heated, and then introduced into the steam turbine. The steam extracted from the moisture separator and heated by the heater is supplied to the steam turbine as the working fluid of the steam turbine together with the steam separated by the moisture separator.

In the present invention, the moisture is separated from the steam as the working fluid introduced into the tubular container by the separator, and the dry steam from which the moisture is separated is heated by the second heater and then the steam turbine. Introduced in. At this time, a part of the dry steam from which the moisture is separated is introduced into the steam extraction pipe through the steam take-out pipe, heated by the first heater, and then introduced into the steam turbine.

Further, in the moisture separation equipment according to the present invention, the heater may heat the heating medium using a heat source outside the system. In the present invention, by using a heat source outside the system for the heater, it is possible to increase the amount of heat retained in the working fluid as compared with the case where the heat source obtained in the system is used, whereby the steam turbine can be used. The thermal efficiency of the turbine can be improved.
Further, in the second heat exchanger, the steam whose moisture is separated by the separator may be heated by using a heat source in the system.

A certain aspect of the power plant according to the present invention is
With a steam generator
A high-pressure steam turbine operated by the steam generated in the steam generator,
A moisture separator that separates moisture from the steam discharged from the high-pressure steam turbine, and
A low-pressure steam turbine that operates with steam separated from the moisture in the moisture separator, and a steam extraction pipe that extracts a part of the steam separated from the moisture from the moisture separator.
A first heat exchanger that heats the steam by exchanging heat between the steam extracted from the moisture separator and the heating medium through the steam extraction pipe.
A heater that heats the heating medium and
A steam introduction pipe that introduces the steam heated by the heat exchanger into the low-pressure steam turbine as a working fluid, and
The high-pressure steam turbine and the generator driven by the low-pressure steam turbine,
A power plant equipped with a condenser that condenses steam discharged from the low-pressure steam turbine .
The moisture separator heats a tubular container, a separator that separates moisture from the vapor as the working fluid introduced into the container, and steam separated by the separator. It is provided with a heat exchanger and a steam take-out pipe provided between the separator and the second heat exchanger to acquire a part of steam whose moisture is separated by the separator.
The steam take-out pipe communicates with the steam extraction pipe .

In some aspects of the power plant according to the present invention, the heater may heat the heating medium using a heat source outside the system.
Further, in the second heat exchanger, the steam whose moisture is separated by the separator may be heated by using a heat source in the system.

The operation method of the steam turbine according to the present invention is the operation method of the turbine performed by using the moisture separation equipment.
A step of separating moisture from steam inside the moisture separator included in the moisture separation equipment, and
A step of extracting a part of the steam from which the moisture has been separated from the moisture separator, and
A step of heating the steam by exchanging heat between the steam extracted from the moisture separator and a heating medium, and
The step includes introducing the steam from which the moisture is separated in the moisture separator and the steam heated by heat exchange with the heating medium into the steam turbine as a working fluid.

In the present invention, a part of the steam separated by the moisture separator is extracted from the moisture separator, the extracted steam is heated, and then introduced into the steam turbine. The steam extracted from the moisture separator and heated by the first heater is supplied to the steam turbine as the working fluid of the steam turbine together with the steam separated by the moisture separator.

According to the present invention, a part of steam is extracted from a moisture separator, the extracted steam is heated by using a first heater provided separately, and then the steam is introduced into a steam turbine. Therefore, it is possible to increase the amount of heat retained in the working fluid introduced into the steam turbine as the working fluid, and the thermal efficiency of the steam turbine is improved. As a result, the power generation efficiency of the power generation system is increased.

It is a block diagram which shows the 1st Embodiment of the power plant including this invention. It is a side sectional view along the longitudinal direction of the moisture separation heater included in a power plant. It is a side sectional view along the width direction of a moisture separation heater. It is a side sectional view of one end of a moisture separation heater. It is a block diagram which shows the 2nd Embodiment of the power plant including this invention.

(First Embodiment)
The first embodiment of the power plant including the moisture separation equipment according to the present invention will be described below.
As shown in FIG. 1, this power plant includes a steam generator 1, a high-pressure steam turbine 2, a feed water separator (humidity separator) 3, a low-pressure steam turbine 4, a steam extraction pipe 5, and the like. Heat exchanger (first heat exchanger) 6, heater 7, steam introduction pipe 8, generator 9, condenser 10, deaerator 11, feed water heater 12, drain tank It has 13A, 13B, and 13C.

The steam generator 1 heats water with a heat source such as a boiler or a nuclear reactor as fossil fuel such as petroleum or coal to generate high-temperature steam. The high-temperature steam generated in the steam generator 1 is introduced from the steam generator 1 to the high-pressure steam turbine 2 through the steam pipe L1. The high-pressure steam turbine 2 is operated by the high-temperature steam generated in the steam generator 1. The steam that has worked for the high-pressure steam turbine 2 is introduced from the high-pressure steam turbine 2 to the moisture separation heater 3 through the steam pipe L2. Further, a part of the high-pressure steam introduced into the high-pressure steam turbine 2 is introduced into the feed water heater 12 through the steam pipe L2a.

The moisture separation heater 3 includes a horizontally placed cylindrical container 31, a separator 32, heat exchangers (second heat exchangers) 33A and 33B, and a steam take-out pipe 34. The separator 32 separates moisture from the steam as the working fluid introduced from the high-pressure steam turbine 2 into the container 31. Steam extracted from the intermediate portion of the high-pressure steam turbine 2 is introduced into the heat exchanger 33A through the steam pipe L3, and the high-temperature steam generated in the steam generator 1 is introduced into the heat exchanger 33B through the steam pipe L4. Introduced through. The heat exchangers 33A and 33B are both heat exchangers, and the heat exchanger 33A is between the steam extracted from the intermediate portion of the high-pressure steam turbine 2 and the steam whose moisture is separated by the separator 32. Heat exchange is performed to heat steam as a working fluid separated from moisture. The heat exchanger 33B exchanges heat between the superheated steam generated in the steam generator 1 and the steam heated by the heat exchanger 33A, and the steam as the working fluid heated by the heat exchanger 33A. To heat further.

The steam take-out pipe 34 is provided between the separator 32 and the heat exchangers 33A and 33B, and obtains a part of the steam whose moisture is separated by the separator 32. The steam take-out pipe 34 communicates with the steam extraction pipe 5. Of the steam whose moisture is separated by the separator 32 in the moisture separation heater 3, the remaining steam that has not flowed into the steam take-out pipe 34 is heated by the heat exchangers 33A and 33B in the tubular container 31. After that, it is introduced into the low-pressure steam turbine 4 through the steam pipe L5. The steam (including condensed water) that has exchanged heat with steam in the heat exchanger 33A is temporarily stored in the drain tank 13A through the drain pipe Ld1 and exchanged heat with the steam in the heat exchanger 33B (including condensed water). Is temporarily stored in the drain tank 13B through the drain pipe Ld2. Further, the condensed water of the moisture discharged from the moisture separation heater 3 is temporarily stored in the drain tank 13C through the drain pipe Ld3.
A detailed description of the structure of the moisture separation heater 3 will be described later.

The low-pressure steam turbine 4 operates by steam separated and heated in the moisture separation heater 3. A part of the steam separated from the moisture in the moisture separation heater 3 flows into the steam extraction pipe 34 and is introduced into the heat exchanger 6 through the steam extraction pipe 5. The heat exchanger 6 causes heat exchange between the steam extracted from the moisture separation heater 3 and the heating medium through the steam extraction tube 5, and heats the steam extracted from the moisture separation heater 3. The heat exchanger 6 is connected to the heater 7 via a medium pipe L6 constituting a closed system. The heater 7 heats the heating medium supplied to the heat exchanger 6. The heated medium circulates between the heat exchanger 6 and the heater 7 through the medium pipe L6. The steam heated in the heat exchanger 6 is introduced into the low-pressure steam turbine 4 through the steam introduction pipe 8, and operates the low-pressure steam turbine 4 together with the steam introduced through the steam pipe L5.

The heater 7 uses an external heat source independent of the system of the power generation plant of the present embodiment, such as a solar condensing heat receiver using a heliostat, a fossil fuel, or a boiler using biomass fuel. Will be adopted.

The high-pressure steam turbine 2 and the low-pressure steam turbine 4 form a uniaxial steam turbine that shares the main shaft 14, and the generator 9 connected to the main shaft 14 is driven by the high-pressure steam turbine 2 and the low-pressure steam turbine 4. NS. The steam that has worked for the low-pressure steam turbine 4 is introduced into the condenser 10 through the steam pipe L7. The condenser 10 condenses the steam discharged from the low-pressure steam turbine 4. The water condensed in the condenser 10 is conveyed by the condenser pump 18 and supplied to the deaerator 11 through the water pipe L8. The condensed water temporarily stored in the drain tank 13C is also supplied to the deaerator 11 through the drain pipe L9. The deaerator 11 removes oxygen from the condensed water in the condenser 10. The water from which oxygen has been removed by the deaerator 11 is conveyed by the feed water pump 19 and supplied to the feed water heater 12 through the water pipe L10. Steam containing condensed water temporarily stored in the drain tank 13A is introduced into the feed water heater 12 through the drain pipe L11a, and steam containing the condensed water temporarily stored in the drain tank 13B is introduced through the drain pipes L11a and L11b. NS. The feed water heater 12 is also a heat exchanger, and the condensed water temporarily stored in the drain tanks 13A and 13B, the steam extracted from the high-pressure steam turbine 2 through the steam pipe L2a, and the degasser 11 are degassed. Heat is exchanged with water to heat the degassed water. The water heated in the feed water heater 12 is supplied to the steam generator 1 through the water pipe L12. Further, the water condensed by heating the degassed water in the feed water heater 12 is introduced into the deaerator 11 through the water pipe L13.

The structure of the moisture separation heater 3 is shown in FIGS. 2 to 4.
The container 31 is formed with a steam inlet 15, a steam outlet 16, and a drain discharge port 17. Inside the container 31, a steam receiving chamber 21 and steam chambers 20A and 20B are provided. The steam chambers 20A and 20B are provided with a supply manifold chamber 22, a moisture separation chamber 23, a heating chamber 24, a drain recovery chamber 25, and a recovery manifold chamber 26, respectively.

The steam inlet 15 communicates with the steam receiving chamber 21, and the steam (S) discharged from the high-pressure steam turbine 2 flows into the container 31 through the steam inlet 15. The steam outlet 16 communicates with the recovery manifold chamber 26, and the steam (superheated steam HS) whose moisture is separated and heated in the steam chambers 20A and 20B is discharged from the container 31 through the steam outlet 16. The drain discharge port 17 communicates with the drain recovery chamber 25, and the condensed water (D) of the moisture separated from the steam is discharged from the container 31 through the drain discharge port 17.

The steam receiving chamber 21 distributes the steam that has flowed into the container 31 through the steam inlet 15 to the steam chambers 20A and 20B. The steam chambers 20A and 20B separate the moisture from the steam flowing in from the steam receiving chamber 21, and heat the steam from which the moisture has been separated. The supply manifold chamber 22 is adjacent to the steam receiving chamber 21, and steam flows into the steam receiving chamber 21 through the steam inlet 15. The moisture separation chamber 23 is arranged below the supply manifold chamber 22, and a separator 32 is provided inside. The moisture separation chamber 23 separates moisture from the steam flowing in from the supply manifold chamber 22 by the separator 32.

The supply manifold chamber 22 is separated from the moisture separation chamber 23 by a partition wall 36, and a slit 35 is formed in the partition wall 36. The moisture separation chamber 23 communicates with the supply manifold chamber 22 through the slit 35, and the steam flowing from the steam receiving chamber 21 into the supply manifold chamber 22 flows into the moisture separation chamber 23 through the slit 35 and is moistened by the separator 32. Minutes are separated. The separator 32 has a plurality of corrugated plates arranged at equal intervals in the longitudinal direction of the container 31.

The moisture separation chamber 23 is separated from the drain collection chamber 25 by a partition wall 38, and an opening 39 is formed in the partition wall 38. The moisture separation chamber 23 communicates with the drain recovery chamber 25 through the opening 39, and the moisture separated from the steam in the moisture separation chamber 23 condenses and flows into the drain recovery chamber 25, and the container is passed through the drain discharge port 17. It is discharged from 31 and flows into the drain tank 13B.

The heating chamber 24 is arranged above the moisture separation chamber 23, and heat exchangers 33A and 33B are provided inside. The heating chamber 24 is partitioned by a supply manifold chamber 22 arranged on both sides in the width direction of the container 31, a moisture separation chamber 23 arranged below the supply manifold chamber 22, and two vertical partition plates 40. The heat exchangers 33A and 33B are arranged between these two vertical partition plates 40. The heat exchanger 33A is arranged below the heat exchanger 33B, and the steam from which the moisture is separated in the moisture separation chamber 23 flows through the heating chamber 24 from the bottom to the top, and the heat exchanger 33A is arranged. It is heated in the process of passing through 33A and 33B in order.

The drain recovery chamber 25 is arranged below the moisture separation chamber 23 and the heating chamber 24, communicates with the moisture separation chamber 23, and collects the condensed water of the moisture separated from the steam. A drain pipe Ld1 is connected to the drain recovery chamber 25, and the condensed water collected in the drain recovery chamber 25 is collected in the drain tank 13B through the drain pipe Ld1.
The recovery manifold chamber 26 is arranged above the steam chambers 20A and 20B, and the steam flowing in from the heating chamber 24 is sent out through the steam outlet 16. The supply manifold chamber 22 and the heating chamber 24 are separated from each other by an inclined plate 41 continuous with the upper ends of the two vertical partition plates 40 that partition the heating chamber 24. The steam heated in the heating chamber 24 flows into the recovery manifold chamber 26, is discharged from the container 31 through the steam outlet 16, and is introduced into the low-pressure steam turbine 4 through the steam pipe L5.

The heat exchanger 33A includes a heat transfer tube 42 formed of a U-shaped tube, a header 43 to which the end of the heat transfer tube 42 is fixed, and a steam receiving chamber 43a and a steam recovery chamber 43b inside the header 43. A partition plate 44 for partitioning is provided. In the header 43, the steam pipe L3 that supplies the steam extracted from the intermediate portion of the high-pressure steam turbine 2 to the heat transfer tube 42 through the steam receiving chamber 43a, and the steam that has passed through the heat transfer tube 42 and its condensed water are supplied to the steam recovery chamber 43b. The drain pipe Ld2 collected from the header 43 is connected to the drain pipe Ld2.

The heat exchanger 33B includes a heat transfer tube 45 formed of a U-shaped tube, a header 46 to which the end of the heat transfer tube 45 is fixed, and a steam receiving chamber 46a and a steam recovery chamber 46b inside the header 46. A partition plate 47 for partitioning is provided. In the header 46, the steam pipe L4 that supplies the superheated steam generated in the steam generator 1 to the heat transfer tube 45 through the steam receiving chamber 46a, and the steam and condensed water that have passed through the heat transfer tube 45 are headered through the steam recovery chamber 46b. The drain pipe Ld2 to be recovered from 46 is connected.
The steam flowing into the steam recovery chamber 43b of the heat exchanger 33A and the steam recovery chamber 46b of the heat exchanger 33B and the condensed water thereof are recovered in the drain tank 13A through the drain pipe Ld2.

As shown in FIG. 3, the steam take-out pipe 34 is provided so as to protrude from the bottom of the container 31 between the moisture separation chamber 23 and the heating chamber 24. The steam take-out pipe 34 penetrates the outer plate and the partition wall 38 of the container 31, and the opening at the upper end is attached toward the heat exchangers 33A and 33B, and the steam extraction pipe 5 is connected to the lower end. Steam flowing from the supply manifold chamber 22 to moisture separating chamber 23 along the partition wall 38 changes the direction of flow in the moisture separating chamber 23, the dry steam moisture Oite the separator 3 2 are separated .. Next, the container 31 gathers at the center in the width direction, changes the flow direction upward, and flows into the heating chamber 24. At this time, since the open end of the steam take-out pipe 34 faces upward, it is difficult for condensed water of moisture to flow into the steam take-out pipe 34. The steam that has flowed into the heating chamber 24 is heated in the process of passing through the heat exchangers 33A and 33B in order.

In the power plant configured as described above, the steam discharged from the high-pressure steam turbine 2 is introduced into the moisture separation heater 3, and a part of the steam separated by the moisture separation heater 3 is used. It is extracted from the moisture separation heater 3 and the extracted steam is heated by the heat exchanger 6. The heating medium of the heat exchanger 6 is heated in the heater 7. As the heat source of the heater 7, an external heat source independent of the system of the power generation plant of the present embodiment, such as a solar condensing heat receiver using a heliostat, a fossil fuel, or a boiler using biomass fuel, is adopted. ..

The remaining steam separated by the moisture separation heater 3 is introduced into the low-pressure steam turbine 4 as the working fluid of the low-pressure steam turbine 4, and the steam heated by the heat exchanger 6 is low-pressure steam. It is supplied as the working fluid of the turbine 4. As the heat source of the heat exchanger 6, an external heat source other than the steam derived from the steam generator 1 can be adopted. As a result, according to the power generation plant, the amount of heat possessed by the steam as the working fluid introduced into the low-pressure steam turbine 4 as the working fluid is used, and the heat source such as steam obtained in the closed system is used as the heat source of the heater 7. It is possible to increase the amount as compared with the case where the steam turbine is used, and the thermal efficiency of the steam turbine can be improved.

(Second embodiment)
The second embodiment of the power plant including the moisture separation equipment according to the present invention will be described below.
The power generation plant of the present embodiment is a power generation plant that utilizes geothermal heat, and as shown in FIG. 5, a moisture separator 71, a steam turbine 72, a steam extraction pipe 73, a heat exchanger 74, and a heater. It includes a (first heater) 75, a steam introduction pipe 76, a generator 77, a condenser 78, and a cooling tower 79.

The steam ejected from the production well W1 of the steam generated by geothermal heat is introduced into the moisture separator 71 through the steam pipe L21. The moisture separator 71 includes a vertically placed cylindrical container 71a and a steam take-out pipe 71b. The steam introduced into the moisture separator 71 separates moisture in the cylindrical container 71a. A steam take-out pipe 71b is erected on the bottom surface of the vertically placed container 71a, and a steam extraction pipe 73 is connected to the top of the container 71a. The steam extraction pipe 73 acquires a part of the steam from which the moisture is separated in the container 71a. Of the steam from which the moisture is separated in the container 71a, the remaining steam that has not flowed into the steam extraction pipe 73 is introduced into the steam turbine 72 from the steam take-out pipe 71b through the steam pipe L22. Condensed water of moisture is temporarily stored in the bottom of the container 71a.

The steam turbine 72 is operated by the steam separated from the moisture in the moisture separator 71. A part of the steam separated by the moisture separator 71 is introduced into the heat exchanger 74 through the steam extraction pipe 73. The heat exchanger 74 causes heat exchange between the steam extracted from the moisture separator 71 and the heating medium through the steam extraction pipe 73, and heats the steam extracted from the moisture separator 71. The heating medium is connected to the heater 75 via a medium pipe L23 constituting a closed system. The heater 75 heats the heating medium supplied to the heat exchanger 74. The heated medium circulates between the heat exchanger 74 and the heater 75 through the medium pipe L23. The steam heated in the heat exchanger 74 is introduced into the steam turbine 72 through the steam introduction pipe 76, and operates the steam turbine 72 together with the steam introduced through the steam pipe L22.

Similar to the first embodiment, the heater 7 is independent of the system of the power plant of the present embodiment, such as a solar condensing heat receiver using a heliostat, a fossil fuel, and a boiler using biomass fuel. Those that use a heat source are adopted.

The generator 77 connected to the main shaft of the steam turbine 72 is driven by the steam turbine 72. The steam that has worked for the steam turbine 72 is introduced into the condenser 78 through the steam pipe L24. The condenser 78 condenses the steam discharged from the steam turbine 72. The cooling tower 79 cools the hot water condensed in the condenser 78. Inside the condenser 78, there is provided a heat exchanger 78a that causes heat exchange between the water cooled in the cooling tower 79 and the steam discharged from the steam turbine 72 and condenses the steam. .. Inside the cooling tower 79, a header 79a for spraying the high-temperature water condensed in the condenser 78 is provided. The water condensed in the condenser 78 is supplied to the cooling tower 79 through the water pipe L25. The high-temperature condensed water supplied to the cooling tower 79 is sprayed from the header 79a and exchanges heat with the air rising in the tower to be cooled. The water cooled in the cooling tower 79 is supplied to the condenser 78 through the water pipe L26, introduced into the heat exchanger 78a, and exchanges heat with the steam discharged from the steam turbine 72 to condense the steam.

The condensed water temporarily stored at the bottom of the container 71a in the moisture separator 71 is introduced into the reduction well W2 through the water pipe L27 and reduced to the underground. Further, the cooling water accumulated at the bottom of the cooling tower 79 is also introduced into the reduction well W2 through the water pipe L28 and returned to the underground.

In the power plant configured as described above, the steam ejected from the production well W1 is introduced into the moisture separator 71, and a part of the steam separated by the moisture separator 71 is part of the moisture separator. It is extracted from 71, and the extracted steam is heated by the heat exchanger 74. The heating medium of the heat exchanger 74 is heated in the heater 75, and the heat source thereof includes, for example, a solar condensing heat receiver using a heliostat, a fossil fuel, and a boiler using biomass fuel. An external heat source independent of the system of the power plant is adopted.

The remaining steam separated by the moisture separator 71 is introduced into the steam turbine 72 as the working fluid of the steam turbine 72, and the steam heated by the heat exchanger 74 operates the steam turbine 72. It is supplied as a fluid. As the heat source of the heat exchanger 74, an external heat source other than steam ejected from the production well W1 can be adopted. As a result, according to the power generation plant, it is possible to increase the amount of heat retained by the steam as the working fluid introduced into the steam turbine 72 as the working fluid, and the thermal efficiency of the steam turbine is improved.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. Configurations can be added, omitted, replaced, and other modifications without departing from the spirit of the present invention. The present invention is not limited by the above description, but only by the matters described in the claims.

The present invention relates to a moisture separation facility for separating moisture from steam as a working fluid of a steam turbine, a power plant including the facility, and a method for operating a steam turbine.
According to the present invention, it is possible to contribute to improving the thermal efficiency of the steam turbine by increasing the amount of heat retained in the working fluid introduced into the steam turbine as the working fluid, and as a result, the power generation efficiency of the power generation plant can be increased. ..

1 Steam generator, 2 High-pressure steam turbine, 3 Moisture separator (humidity separator), 4 Low-pressure steam turbine, 5 Steam extraction pipe, 6 Heat exchanger (first heat exchanger), 7 Heater, 8 steam introduction pipe, 9 generator, 10 condenser, 11 deaerator, 12 water supply heater, 13A, 13B drain tank, 32 separator, 33A, 33B heat exchanger (second heat exchanger), 34 steam Extraction pipe, 71 Moisture separator, 72 Steam turbine, 73 Steam extraction pipe, 74 Heat exchanger, 75 Heater, 76 Steam introduction pipe, 77 Generator, 78 Condenser, 79 Cooling tower, W1 production well, W2 Condensate well

Claims (7)

A moisture separator that separates moisture from steam as the working fluid of a steam turbine,
A steam extraction tube that extracts a part of the steam from which the moisture has been separated from the moisture separator, and
A first heat exchanger that heats the steam by exchanging heat between the steam extracted from the moisture separator and the heating medium through the steam extraction pipe.
A heater that heats the heating medium and
A steam introduction pipe for introducing the steam heated by the first heat exchanger into the steam turbine as a working fluid is provided.
The steam turbine, the moisture separator vapor moisture separated in, and a moisture separator equipment is operated by the steam heated by the first heat exchanger,
The moisture separator heats a tubular container, a separator that separates moisture from the vapor as the working fluid introduced into the container, and steam separated by the separator. Further provided, a heat exchanger and a steam take-out pipe provided between the separator and the second heat exchanger to obtain a part of the steam whose moisture is separated by the separator.
The steam take-out pipe is a moisture separation facility that communicates with the steam extractor pipe . The moisture separation equipment according to claim 1, wherein the heater heats the heating medium using a heat source outside the system. The moisture separation equipment according to claim 1 or 2, wherein the second heat exchanger heats the steam whose moisture is separated by the separator using a heat source in the system. With a steam generator
A high-pressure steam turbine operated by the steam generated in the steam generator,
A moisture separator that separates moisture from the steam discharged from the high-pressure steam turbine, and
A low-pressure steam turbine that operates with steam separated from the moisture in the moisture separator, and a steam extraction pipe that extracts a part of the steam separated from the moisture from the moisture separator.
A first heat exchanger that heats the steam by exchanging heat between the steam extracted from the moisture separator and the heating medium through the steam extraction pipe.
A heater that heats the heating medium and
A steam introduction pipe that introduces the steam heated by the heat exchanger into the low-pressure steam turbine as a working fluid, and
The high-pressure steam turbine and the generator driven by the low-pressure steam turbine,
A power plant equipped with a condenser that condenses steam discharged from the low-pressure steam turbine .
The moisture separator heats a tubular container, a separator that separates moisture from the vapor as the working fluid introduced into the container, and steam separated by the separator. It is provided with a heat exchanger and a steam take-out pipe provided between the separator and the second heat exchanger to acquire a part of steam whose moisture is separated by the separator.
The steam take-out pipe is a power plant that communicates with the steam extractor pipe . The power plant according to claim 4, wherein the heater heats the heating medium using a heat source outside the system. The power plant according to claim 4 or 5, wherein the second heat exchanger heats the steam whose moisture is separated by the separator using a heat source in the system. A method for operating a steam turbine using the moisture separation equipment according to any one of claims 1 to 3.
A step of separating moisture from steam inside the moisture separator included in the moisture separation equipment, and
A step of extracting a part of the steam from which the moisture has been separated from the moisture separator, and
A step of heating the steam by exchanging heat between the steam extracted from the moisture separator and a heating medium, and
A method for operating a steam turbine, which comprises a step of introducing steam separated from moisture in the moisture separator and steam heated by heat exchange with the heating medium into a steam turbine as a working fluid.

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