WO2019124066A1 - Installation de séparation d'humidité, centrale électrique et procédé de fonctionnement d'une turbine à vapeur - Google Patents

Installation de séparation d'humidité, centrale électrique et procédé de fonctionnement d'une turbine à vapeur Download PDF

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Publication number
WO2019124066A1
WO2019124066A1 PCT/JP2018/044629 JP2018044629W WO2019124066A1 WO 2019124066 A1 WO2019124066 A1 WO 2019124066A1 JP 2018044629 W JP2018044629 W JP 2018044629W WO 2019124066 A1 WO2019124066 A1 WO 2019124066A1
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Prior art keywords
steam
moisture
separator
vapor
heat exchanger
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PCT/JP2018/044629
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English (en)
Japanese (ja)
Inventor
一作 藤田
良太 ▲高▼橋
Original Assignee
三菱日立パワーシステムズ株式会社
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Application filed by 三菱日立パワーシステムズ株式会社 filed Critical 三菱日立パワーシステムズ株式会社
Priority to CN201880075357.2A priority Critical patent/CN111373123B/zh
Priority to EP18892527.5A priority patent/EP3696381A4/fr
Publication of WO2019124066A1 publication Critical patent/WO2019124066A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
    • F01K7/22—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type the turbines having inter-stage steam heating
    • F01K7/223—Inter-stage moisture separation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/34—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
    • F01K7/44—Use of steam for feed-water heating and another purpose
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/26—Steam-separating arrangements
    • F22B37/266—Separator reheaters

Definitions

  • 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 of operating a steam turbine.
  • a high pressure turbine is driven by steam (main steam) generated in a steam generator, and when the main steam is close to a saturated state, low pressure turbine is generated by steam (cycle steam) discharged from the high pressure turbine.
  • the steam discharged from the high-pressure turbine works by the high-pressure turbine to reduce the heat holding amount, thereby condensing a part of the steam to generate moisture (wet steam). Therefore, if the steam discharged from the high pressure turbine is directly introduced into the low pressure turbine, 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. The moisture separation heater separates moisture from the steam discharged from the high pressure turbine and heats the moisture separated steam to produce superheated steam.
  • the moisture separation heater of the power plant includes a cylindrical container placed horizontally, and the heated steam (the steam discharged from the high pressure turbine) introduced into the container, the main steam And a heater for heating with higher temperature steam.
  • the present invention has been made in view of the above circumstances, and contributes to the improvement of the thermal efficiency of a steam turbine by increasing the amount of heat stored in the working fluid introduced into the steam turbine as the working fluid, and as a result, a power plant It is an object of the present invention to provide a moisture separation facility, a power plant, and a method of operating a steam turbine that make it possible to enhance the power generation efficiency of the
  • the moisture separation equipment is A moisture separator for separating moisture from steam as a working fluid of the steam turbine; A steam extraction pipe for extracting a part of the moisture separated from the moisture separator; A first heat exchanger that heats the vapor by heat exchange between the vapor extracted from the moisture separator and the heating medium through the vapor 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;
  • the steam turbine is operated by the steam separated in the moisture separator and the steam heated by the heat exchanger.
  • a part of the steam whose moisture is separated in the moisture separator is extracted from the moisture separator, and the extracted steam is heated and introduced into the steam turbine.
  • the steam extracted from the moisture separator and heated by the heater is supplied as a working fluid of the steam turbine together with the steam whose moisture is separated in the moisture separator.
  • the moisture separator includes a cylindrical container, a separator for separating moisture from the vapor as the working fluid introduced into the container, and the separator using the separator.
  • a second heat exchanger for heating the separated steam, and a steam take-out provided between the separator and the second heat exchanger to obtain a part of the steam separated by the separator A pipe may be provided, and the vapor outlet pipe may be in communication with the vapor extraction pipe.
  • the moisture is separated from the steam as the working fluid introduced into the cylindrical 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 to 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 extraction pipe, heated by the first heater, and then introduced into the steam turbine.
  • the heater may heat the heating medium using a heat source outside the system.
  • a heat source outside the system.
  • the present invention by using an off-system heat source for the heater, it is possible to increase the heat storage capacity of the working fluid as compared to the case where the heat source obtained in the system is used, whereby the steam turbine
  • the thermal efficiency of the The second heat exchanger may heat the steam whose moisture content has been separated by the separator, using a heat source in the system.
  • a steam generator A high pressure steam turbine operated by steam generated in the steam generator; A moisture separator for separating moisture from the steam discharged from the high pressure steam turbine; A low pressure steam turbine operating with steam separated in the moisture separator, a steam extraction pipe extracting a part of the separated steam from the moisture separator; A first heat exchanger that heats the vapor by heat exchange between the vapor extracted from the moisture separator and the heating medium through the vapor extraction pipe; A heater for heating the heating medium; A steam introducing pipe for introducing the steam heated by the heat exchanger into the low pressure steam turbine as a working fluid; A generator driven by the high pressure steam turbine and the low pressure steam turbine; And a condenser for condensing the steam discharged from the low pressure steam turbine.
  • the moisture separator includes a cylindrical container, a separator for separating moisture from the vapor as the working fluid introduced into the container, and the moisture by the separator.
  • a second heat exchanger for heating the separated steam, and a steam provided between the separator and the second heat exchanger, the steam obtaining part of the steam separated by the separator The vapor extraction pipe may be in communication with the vapor extraction pipe.
  • the heater may heat the heating medium using a heat source outside the system.
  • the second heat exchanger may heat the steam whose moisture content has been separated by the separator, using a heat source in the system.
  • a moisture separator that separates moisture from the steam generated by the geothermal system
  • a steam turbine operated by steam separated in the moisture separator
  • a steam extraction pipe for extracting a part of the moisture separated from the moisture separator
  • a heat exchanger that heats the vapor by heat exchange between the vapor extracted from the moisture separator and the heating medium through the vapor extraction pipe
  • a heater for heating the heating medium
  • a steam introducing pipe for introducing the steam heated by the heat exchanger into the steam turbine as a working fluid
  • a condenser for condensing the steam discharged from the steam turbine.
  • the heater may heat the heating medium using a heat source outside the system.
  • the operating method of a steam turbine according to the present invention is Separating moisture from steam inside the moisture separator; Extracting a portion of the separated moisture from the moisture separator; Heat exchange between the steam extracted from the moisture separator and the heating medium to heat the steam; Introducing the steam separated in the moisture separator and the steam heated by exchanging heat with the heating medium into a steam turbine as a working fluid.
  • a part of the steam whose moisture is separated in the moisture separator is extracted from the moisture separator, and the extracted steam is heated and introduced into the steam turbine.
  • the steam extracted from the moisture separator and heated by the first heater is supplied as a working fluid of the steam turbine together with the steam whose moisture is separated in the moisture separator.
  • part of the steam is extracted from the moisture separator, and the extracted steam is heated using a separately provided first heater and then introduced into the steam turbine.
  • FIG. 1 is a block diagram illustrating a first embodiment of a power plant including the present invention. It is a side sectional view which meets a longitudinal direction of a moisture separation heater contained in a power plant. It is a sectional side 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 showing a second embodiment of a power plant including the present invention.
  • FIG. 1 A first embodiment of a power plant including a moisture separation facility according to the present invention will be described below.
  • this power plant includes a steam generator 1, a high pressure steam turbine 2, a moisture separation heater (moisture separator) 3, a low pressure steam turbine 4, and a steam extraction pipe 5.
  • Heat exchanger (first heat exchanger) 6 heater 7, steam introduction pipe 8, generator 9, condenser 10, deaerator 11, feed water heater 12, drain tank 13A, 13B, 13C.
  • the steam generator 1 generates high-temperature steam by heating water with a heat source such as a boiler or a nuclear reactor that uses fossil fuel such as petroleum or coal.
  • 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 operates with the high temperature steam generated in the steam generator 1.
  • the steam that has been worked on the high pressure steam turbine 2 is introduced from the high pressure steam turbine 2 to the moisture separation heater 3 through the steam piping L2. Further, 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 disposed cylindrical container 31, a separator 32, heat exchangers (second heat exchangers) 33A and 33B, and a steam extraction pipe 34.
  • the separator 32 separates moisture from the steam as the working fluid introduced into the vessel 31 from the high pressure steam turbine 2.
  • the steam extracted from the middle part of the high pressure steam turbine 2 is introduced to the heat exchanger 33A through the steam pipe L3, and the high temperature steam generated in the steam generator 1 is transferred to the heat exchanger 33B in the steam pipe L4.
  • Introduced through The heat exchangers 33A and 33B are all heat exchangers, and the heat exchanger 33A is provided between the steam extracted from the middle portion of the high pressure steam turbine 2 and the steam whose moisture content is separated by the separator 32.
  • Heat exchange is performed to heat the vapor as the 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 Further heat.
  • the vapor outlet pipe 34 is provided between the separator 32 and the heat exchangers 33A and 33B, and acquires a part of the vapor whose moisture content is separated by the separator 32.
  • the vapor extraction pipe 34 is in communication with the vapor extraction pipe 5.
  • the remaining vapor that has not flowed into the vapor extraction pipe 34 is heated by the heat exchangers 33A and 33B in the container 31. , And is introduced into the low pressure steam turbine 4 through the steam piping L5.
  • the low pressure steam turbine 4 is operated by the steam which has been separated in the moisture separation heater 3 and heated. A part of the steam whose moisture is separated 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 performs heat exchange between the steam extracted from the moisture separation heater 3 through the steam extraction pipe 5 and the heating medium, 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 to the low pressure steam turbine 4 through the steam inlet pipe 8 and operates the low pressure steam turbine 4 together with the steam introduced through the steam piping L5.
  • an external heat source independent of the system of the power plant of this embodiment such as a sunlight collecting heat receiver using a heliostat, a fossil fuel, a boiler using biomass fuel, etc. Will be adopted.
  • the high pressure steam turbine 2 and the low pressure steam turbine 4 constitute a single-shaft steam turbine sharing 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 Ru.
  • 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 condensate 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 water condensed in the condenser 10.
  • the water from which oxygen has been removed in the deaerator 11 is conveyed by the water supply pump 19 and supplied to the water supply heater 12 through the water pipe L10.
  • steam containing condensed water temporarily stored in the drain tank 13A is introduced through the drain pipe L11a
  • steam containing condensed water temporarily stored in the drain tank 13B is introduced through the drain pipes L11a and L11b. Ru.
  • the feed water heater 12 is also a heat exchanger, and the condensed water temporarily stored in the drain tanks 13A and 13B and the steam extracted from the high pressure steam turbine 2 through the steam pipe L2a are deaerated in the deaerator 11 Heat exchange with water is performed 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 being supplied to the heating of 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 vessel 31 is provided with a steam inlet 15, a steam outlet 16 and a drain outlet 17.
  • a steam receiving chamber 21 and steam chambers 20A and 20B are provided inside the container 31 .
  • Each of the steam chambers 20A and 20B is 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.
  • 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 vessel 31 through the steam inlet 15.
  • the steam outlet 16 is in communication with the recovery manifold chamber 26, and moisture separated and heated steam (superheated steam HS) 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 collection chamber 25, and condensed water (D) of moisture separated from the vapor 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 into the steam chambers 20A and 20B.
  • the steam chambers 20A and 20B separate moisture from the steam flowing in from the steam receiving chamber 21 and heat the steam from which the moisture is 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 disposed below the supply manifold chamber 22 and a separator 32 is provided inside. The moisture separating chamber 23 separates moisture from the vapor flowing from the supply manifold chamber 22 by the separator 32.
  • the supply manifold chamber 22 is separated from the moisture separating chamber 23 by a partition 36, and a slit 35 is formed in the partition 36.
  • the moisture separation chamber 23 is in communication with the supply manifold chamber 22 through the slit 35, and the vapor flowing from the vapor receiving chamber 21 into the supply manifold chamber 22 flows into the moisture separation chamber 23 through the slit 35 and is wetted by the separator 32.
  • the 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 recovery chamber 25 by a partition 38, and an opening 39 is formed in the partition 38.
  • the moisture separating chamber 23 communicates with the drain collecting chamber 25 through the opening 39, and the moisture separated from the vapor in the moisture separating chamber 23 condenses and flows into the drain collecting chamber 25 and the container through the drain outlet 17 It is discharged from 31 and flows into the drain tank 13B.
  • the heating chamber 24 is disposed 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 disposed on both sides in the width direction of the container 31, a moisture separation chamber 23 disposed below the supply manifold chamber 22, and two vertical partition plates 40.
  • the heat exchangers 33A and 33B are disposed between the two vertical partition plates 40.
  • the heat exchanger 33A is disposed below the heat exchanger 33B, and the steam whose moisture content is separated in the moisture separation chamber 23 flows from the bottom to the top of the heating chamber 24, and the heat exchanger It heats in the process which passes 33A and 33B in order.
  • the drain recovery chamber 25 is disposed below the moisture separation chamber 23 and the heating chamber 24, communicates with the moisture separation chamber 23, and recovers the condensed water of the moisture separated from the vapor.
  • a drain pipe Ld1 is connected to the drain collecting chamber 25, and the condensed water collected in the drain collecting chamber 25 is collected in the drain tank 13B through the drain pipe Ld1.
  • the recovery manifold chamber 26 is disposed above the steam chambers 20 A and 20 B, and delivers the steam flowing in from the heating chamber 24 through the steam outlet 16.
  • the supply manifold chamber 22 and the heating chamber 24 are separated by the inclined plate 41 continuing to the upper end of the two vertical partition plates 40 which divide the heating chamber 24.
  • the steam heated in the heating chamber 24 flows into the recovery manifold chamber 26, is discharged from the vessel 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. And the partition plate 44 which divides into.
  • the header 43 includes a steam pipe L3 for supplying the steam extracted from the middle portion of the high pressure steam turbine 2 to the heat transfer pipe 42 through the steam receiving chamber 43a, the steam flowing through the heat transfer pipe 42 and its condensed water in the steam recovery chamber 43b And the drain piping Ld2 to be collected from the header 43 are connected.
  • 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, a steam receiving chamber 46a and a steam recovery chamber 46b inside the header 46 And the partition plate 47 which divides into.
  • the header 46 includes a steam pipe L4 for supplying the superheated steam generated in the steam generator 1 to the heat transfer pipe 45 through the steam receiving chamber 46a, and a steam and condensed water flowing through the heat transfer pipe 45 through the steam recovery chamber 46b
  • a drain pipe Ld2 to be recovered from the line 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 to the drain tank 13A through the drain pipe Ld2.
  • the vapor outlet pipe 34 is provided so as to protrude from the bottom of the container 31 between the moisture separating chamber 23 and the heating chamber 24.
  • the steam extraction pipe 34 penetrates the outer plate and the partition wall 38 of the container 31, is attached with the opening at the upper end facing the heat exchangers 33A and 33B, and the steam extraction pipe 5 is connected to the lower end.
  • the vapor flowing from the supply manifold chamber 22 into the moisture separation chamber 23 changes its flow direction along the partition wall 38 in the moisture separation chamber 23, and the moisture is separated in the separator 32 to become dry vapor. Next, it gathers at the center in the width direction of the container 31, turns its flow direction upward, and flows into the heating chamber 24. At this time, since the open end of the steam extraction pipe 34 is upward, condensed water of moisture hardly flows into it.
  • the vapor flowing into the heating chamber 24 is heated in the process of sequentially passing through the heat exchangers 33A and 33B.
  • the steam discharged from the high pressure steam turbine 2 is introduced into the moisture separation heater 3 and a part of the steam whose moisture is separated in the moisture separation heater 3 is Extracted from the moisture separation heater 3, the extracted vapor is heated by the heat exchanger 6.
  • the heating medium of the heat exchanger 6 is heated in the heater 7.
  • a heat source of the heater 7 for example, an external heat source independent from the system of the power plant of this embodiment, such as a sunlight collecting heat receiver using a heliostat, a fossil fuel, a boiler using biomass fuel, etc. .
  • the remaining steam whose moisture content has been separated in the moisture separation heater 3 is introduced to the low pressure steam turbine 4 as a working fluid for the low pressure steam turbine 4 and the steam heated by the heat exchanger 6 is a low pressure steam. It is supplied as a working fluid of the turbine 4.
  • a heat source of the heat exchanger 6 an external heat source which is not the steam derived from the steam generator 1 can be adopted.
  • the heat storage amount of the steam as the working fluid introduced into the low pressure steam turbine 4 as the working fluid is used as the heat source of the heater 7 such as the steam obtained in the closed system. And the thermal efficiency of the steam turbine can be improved.
  • the power generation plant of this embodiment is a power generation plant using 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 A first heater 75, a steam introduction pipe 76, a generator 77, a condenser 78, and a cooling tower 79 are provided.
  • the steam ejected from the production well W1 of the steam generated by the geothermal heat is introduced to the moisture separator 71 through the steam pipe L21.
  • the moisture separator 71 includes a vertically disposed cylindrical container 71a and a vapor outlet pipe 71b.
  • the vapor introduced into the moisture separator 71 separates moisture in the cylindrical container 71a.
  • a vapor takeout pipe 71b is erected on the bottom of the vertically disposed container 71a, and a vapor extraction pipe 73 is connected to the top of the container 71a.
  • the vapor extraction pipe 73 acquires a part of the vapor whose moisture content has been separated in the container 71a.
  • the remaining steam that has not flowed into the steam extraction pipe 73 is introduced from the steam extraction pipe 71b to the steam turbine 72 through the steam pipe L22.
  • the condensed water of moisture is temporarily stored at the bottom of the container 71a.
  • the steam turbine 72 operates with the steam whose moisture is separated in the moisture separator 71.
  • a part of the steam whose moisture is separated in the moisture separator 71 is introduced into the heat exchanger 74 through the steam extraction pipe 73.
  • the heat exchanger 74 performs heat exchange between the vapor extracted from the moisture separator 71 through the vapor extraction pipe 73 and the heating medium, and heats the vapor extracted from the moisture separator 71.
  • the heating medium is connected to the heater 75 via a medium pipe L23 that constitutes 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 inlet pipe 76, and operates the steam turbine 72 together with the steam introduced through the steam piping L22.
  • the heater 7 is, for example, a sunlight collecting heat receiver using a heliostat, a fossil fuel, a boiler using a biomass fuel, or the like, which is independent of the system of the power plant of this embodiment. Those utilizing a heat source are employed.
  • 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 high temperature water condensed in the condenser 78.
  • a heat exchanger 78a for performing heat exchange between the water cooled in the cooling tower 79 and the steam discharged from the steam turbine 72 to condense the steam is provided.
  • a header 79a for dispersing the high temperature water condensed in the condenser 78 is provided inside the cooling tower 79.
  • 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 dispersed from the header 79a and is cooled by heat exchange with the air rising in the tower.
  • the water cooled in the cooling tower 79 is supplied to the condenser 78 through the water pipe L26 and 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 in the bottom of the container 71a in the moisture separator 71 is introduced into the reduction well W2 through the water pipe L27, and is reduced 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 is reduced underground.
  • the steam ejected from the production well W1 is introduced into the moisture separator 71, and a part of the steam whose moisture is separated in the moisture separator 71 is the moisture separator
  • the extracted steam is heated by the heat exchanger 74.
  • the heating medium of the heat exchanger 74 is heated by the heater 75, and the heat source thereof is, for example, a sunlight collecting heat receiver employing a heliostat, a boiler using fossil fuel, biomass fuel, etc.
  • An external heat source independent of the power plant's grid is adopted.
  • the remaining steam whose moisture content is separated in the moisture separator 71 is introduced to the steam turbine 72 as a working fluid of the steam turbine 72, and the steam heated by the heat exchanger 74 is operated of the steam turbine 72. It is supplied as a fluid.
  • a heat source of the heat exchanger 74 an external heat source which is not the steam ejected from the production well W1 can be adopted.
  • the heat storage amount of the steam as the working fluid introduced into the steam turbine 72 as the working fluid can be increased, and the thermal efficiency of the steam turbine is improved.
  • 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 of operating a steam turbine. According to the present invention, it is possible to contribute to the improvement of the thermal efficiency of the steam turbine by increasing the heat quantity of the working fluid introduced to the steam turbine as the working fluid, and as a result, the power generation efficiency of the power plant can be enhanced. .

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  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
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  • Combustion & Propulsion (AREA)
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  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

L'invention concerne une installation de séparation d'humidité qui est pourvue : d'un dispositif de chauffage de séparation d'humidité (3) qui sépare le contenu en humidité d'une vapeur; d'un tuyau d'extraction de vapeur (5) qui extrait une partie de la vapeur provenant du dispositif de chauffage de séparation d'humidité (3); d'un échangeur de chaleur (6) qui effectue un échange de chaleur entre un milieu de chauffage et une vapeur qui est extraite du dispositif de chauffage de séparation d'humidité (3) à travers le tuyau d'extraction de vapeur (5), ce qui permet de chauffer la vapeur; d'un dispositif de chauffage (7) qui chauffe le milieu de chauffage; et d'un tuyau d'introduction de vapeur (8) qui introduit la vapeur, qui a été chauffée par l'échangeur de chaleur (6), dans une turbine à vapeur basse pression (4) en tant que fluide de travail. Cette installation de séparation d'humidité est actionnée à travers la turbine à vapeur basse pression (4), par la vapeur à partir de laquelle la teneur en humidité a été séparée au moyen du dispositif de chauffage de séparation d'humidité (3), et par la vapeur qui a été chauffée au moyen de l'échangeur de chaleur (6).
PCT/JP2018/044629 2017-12-21 2018-12-04 Installation de séparation d'humidité, centrale électrique et procédé de fonctionnement d'une turbine à vapeur WO2019124066A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201880075357.2A CN111373123B (zh) 2017-12-21 2018-12-04 湿气分离设备、发电设备以及蒸汽涡轮的运行方法
EP18892527.5A EP3696381A4 (fr) 2017-12-21 2018-12-04 Installation de séparation d'humidité, centrale électrique et procédé de fonctionnement d'une turbine à vapeur

Applications Claiming Priority (2)

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JP2017-245154 2017-12-21
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EP3696381A1 (fr) 2020-08-19
JP6963492B2 (ja) 2021-11-10

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