CN115288960A - Solar energy coupled steam turbine system and power generation system - Google Patents

Solar energy coupled steam turbine system and power generation system Download PDF

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Publication number
CN115288960A
CN115288960A CN202210986656.XA CN202210986656A CN115288960A CN 115288960 A CN115288960 A CN 115288960A CN 202210986656 A CN202210986656 A CN 202210986656A CN 115288960 A CN115288960 A CN 115288960A
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China
Prior art keywords
steam
outlet
inlet
heat
pipeline
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CN202210986656.XA
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Chinese (zh)
Inventor
杨庆川
杨利
孙永军
康夜雨
张兰庆
张军
余小兵
刘学亮
郑天帅
赵若昱
李保垒
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Xian Thermal Power Research Institute Co Ltd
Xian Xire Energy Saving Technology Co Ltd
Dezhou Power Plant of Huaneng International Power Co Ltd
Original Assignee
Xian Thermal Power Research Institute Co Ltd
Xian Xire Energy Saving Technology Co Ltd
Dezhou Power Plant of Huaneng International Power Co Ltd
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Application filed by Xian Thermal Power Research Institute Co Ltd, Xian Xire Energy Saving Technology Co Ltd, Dezhou Power Plant of Huaneng International Power Co Ltd filed Critical Xian Thermal Power Research Institute Co Ltd
Priority to CN202210986656.XA priority Critical patent/CN115288960A/en
Publication of CN115288960A publication Critical patent/CN115288960A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G6/00—Devices for producing mechanical power from solar energy
    • F03G6/06—Devices for producing mechanical power from solar energy with solar energy concentrating means
    • F03G6/065—Devices for producing mechanical power from solar energy with solar energy concentrating means having a Rankine cycle
    • F03G6/067—Binary cycle plants where the fluid from the solar collector heats the working fluid via a heat exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/10—Adaptations for driving, or combinations with, electric generators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/34—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
    • F01K7/38—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating the engines being of turbine type
    • 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
    • F01K7/40—Use of two or more feed-water heaters in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G6/00—Devices for producing mechanical power from solar energy
    • F03G6/071—Devices for producing mechanical power from solar energy with energy storage devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G6/00—Devices for producing mechanical power from solar energy
    • F03G6/098—Components, parts or details
    • F03G6/108—Components, parts or details of the heat transfer system
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers
    • Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

The invention provides a solar energy coupling steam turbine system and a power generation system, wherein the solar energy coupling steam turbine system comprises: the system comprises a solar heating device, a first heat exchange device, a steam turbine and a steam generating device, wherein the solar heating device is used for converting solar energy into heat energy, the steam generating device is used for evaporating water into steam, and the solar heating device comprises a first medium inlet and a first medium outlet; the first heat exchange device comprises a first heat absorption side inlet, a first heat absorption side outlet, a first heat release side inlet and a first heat release side outlet, the first heat release side inlet is communicated with the first medium outlet, and the first heat release side outlet is communicated with the first medium inlet; the steam generating device comprises a first water inlet and a first steam outlet; the steam turbine includes high-pressure cylinder and intermediate pressure jar, and the high-pressure cylinder includes first steam inlet and second steam outlet, and first steam inlet communicates with first steam outlet, and second steam outlet communicates with first heat absorption side import. The solar energy coupling steam turbine system has the advantage of low use cost.

Description

Solar-coupled steam turbine system and power generation system
Technical Field
The invention relates to the technical field of turbine power generation, in particular to a solar-coupled turbine system and a power generation system.
Background
The steam turbine is a rotary steam power device, and the steam turbine is one of main equipment of modern thermal power generation. The steam turbine power generation system in the related art uses a steam turbine to do work and further drives the engine to generate power, however, the coal combustion amount of the steam turbine power generation system in the related art is large, so that the pollutant emission of the steam turbine power generation system is large, and the power generation cost is high.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the embodiment of the invention provides a solar energy coupling steam turbine system which has the advantages of low use cost, low energy consumption and environmental protection.
The embodiment of the invention also provides a power generation system which comprises the solar-coupled steam turbine system of the embodiment.
The solar energy coupling steam turbine system of the embodiment of the invention comprises: a solar heating device for converting solar energy into thermal energy, the solar heating device comprising a first medium inlet and a first medium outlet; the first heat exchange device comprises a first heat absorption side inlet, a first heat absorption side outlet, a first heat release side inlet and a first heat release side outlet, the first heat release side inlet is communicated with the first medium outlet, and the first heat release side outlet is communicated with the first medium inlet; a steam generating device for evaporating water into steam, the steam generating device comprising a first water inlet and a first steam outlet; the steam turbine, the steam turbine includes high pressure cylinder and intermediate pressure jar, the high pressure cylinder includes first steam inlet and second steam outlet, first steam inlet with first steam outlet intercommunication, the second steam outlet with first heat absorption side inlet intercommunication, the intermediate pressure jar includes second steam inlet, second steam inlet with first heat absorption side outlet intercommunication.
According to the solar-coupled steam turbine system disclosed by the embodiment of the invention, the solar heating device is used for replacing the steam generating device to heat the cold reheat steam, so that the heat of the fuel required to be consumed by the steam generating device is reduced, the fuel consumption of the solar-coupled steam turbine system disclosed by the embodiment of the invention is reduced, the cost is saved, and the emission of pollutants generated by burning the fuel is also reduced.
Therefore, the solar-coupled steam turbine system has the advantages of low use cost, low energy consumption and environmental friendliness.
In some embodiments, the steam generating device comprises: a steam generator having the first water inlet, a third steam outlet, and a fourth steam outlet; a first steam heater comprising a first heating inlet and a first heating outlet, the first heating inlet in communication with the third steam outlet, the first heating outlet in communication with the first steam outlet; and the second steam heater comprises a second heating inlet and a second heating outlet, the second heating inlet is communicated with the fourth steam outlet, and the second heating outlet is communicated with the first steam outlet.
In some embodiments, the solar coupled steam turbine system further comprises: one end of the first pipeline is connected with the first steam outlet, and the other end of the first pipeline is connected with the first steam inlet; one end of the second pipeline is connected with the second steam outlet, and the other end of the second pipeline is connected with the first heat absorption side inlet; and one end of the third pipeline is connected with the first heat absorption side outlet, and the third pipeline is connected with the second steam inlet.
In some embodiments, the solar heating apparatus further comprises: a body having a first media inlet and a first media outlet; one end of the fourth pipeline is connected with the first medium outlet, and the other end of the fourth pipeline is connected with the first heat release side inlet; and one end of the fifth pipeline is connected with the first medium inlet, and the other end of the fifth pipeline is connected with the first heat release side outlet.
In some embodiments, the solar heating apparatus further comprises an energy storage device comprising: the second heat exchange device comprises a first heat exchange channel and a second heat exchange channel, the first heat exchange channel comprises a first heat exchange inlet and a first heat exchange outlet, the first heat exchange inlet is communicated with the fourth pipeline, the first heat exchange outlet is communicated with the fifth pipeline, the heat storage tank comprises a second medium inlet and a second medium outlet, the second heat exchange channel comprises a second heat exchange inlet and a second heat exchange outlet, the second medium inlet is communicated with the second heat exchange inlet, and the second medium outlet is communicated with the second heat exchange outlet.
In some embodiments, the solar coupled steam turbine system further comprises: the condensing device comprises a third steam inlet and a first water outlet, the intermediate pressure cylinder is provided with a fifth steam outlet, the third steam inlet is communicated with the fifth steam outlet, and the first water outlet is communicated with the first water inlet.
In some embodiments, the solar coupled steam turbine system further comprises a regenerative system, the regenerative system comprising a third heat exchange device, a first heat return line, and a second heat return line, the third heat exchange device comprising a second heat absorption side inlet, a second heat absorption side outlet, a second heat release side inlet, and a second heat release side outlet, the second heat release side inlet being in communication with the first heat release side outlet, the second heat release side outlet being connected to the first medium inlet, one end of the first heat return line being connected to the second heat absorption side inlet, the other end of the first heat return line being in communication with the first water outlet, one end of the second heat return line being connected to the second heat absorption side outlet, the other end of the second heat return line being in communication with the first water inlet.
In some embodiments, the solar coupled turbine system further includes a sixth pipeline, the regenerative system includes a first regenerative device and a second regenerative device, one end of the sixth pipeline is connected to the first water inlet, the other end of the sixth pipeline is connected to the first water outlet, the sixth pipeline includes a second water inlet and a second water outlet, the other end of the first regenerative pipeline is communicated with the first water outlet, the other end of the second regenerative pipeline is communicated with the first water inlet, the first regenerative device and the second regenerative device are both used for heating water in the sixth pipeline, the first regenerative device and the second regenerative device are both disposed on the sixth pipeline, the first regenerative device includes a fourth steam inlet, the fourth steam inlet is communicated with at least one of the high pressure cylinder and the medium pressure cylinder, the first regenerative device is disposed between the second water inlet and the second water outlet, the second regenerative device includes a fifth steam inlet, the fifth steam inlet is communicated with at least one of the high pressure cylinder and the medium pressure cylinder, and the second regenerative device is disposed between the second water inlet and the second water inlet.
In some embodiments, the solar coupled steam turbine system further comprises: and the oxygen removal device is arranged on the sixth pipeline.
The steam turbine system power generation system of the embodiment of the invention comprises: a generator; the steam turbine system is the steam turbine system coupled with solar energy in any embodiment.
Drawings
FIG. 1 is a schematic block diagram of a solar coupled turbine system according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of a steam generator according to an embodiment of the present invention.
Reference numerals:
a turbine system 100 coupling solar energy;
a solar heating device 1; a first medium inlet 11; a first medium outlet 12; a body 13; a fourth pipeline 14; a fifth pipeline 15; an energy storage device 16; second heat exchange means 161; a first heat exchange inlet 1611; a first heat exchange outlet 1612; a second heat exchange inlet 1613; a second heat exchange outlet 1614; a heat storage tank 162;
a first heat exchange means 2; a first heat absorbing side inlet 21; a first heat absorption side outlet 22; a first heat release side inlet 23; a first heat release side outlet 24;
a steam generating device 3; a first water inlet 31; a first steam outlet 32; a steam generator 33; an economizer 331; a water cooled wall 332; a steam-water separator 333; a horizontal low temperature superheater 334; a third steam outlet 3341; a fourth vapor outlet 3342; a first steam heater 34; a vertical low-temperature superheater 341; first heating inlet 3411; platen superheater 342; finishing superheater 343; first heating outlet 3431; a second steam heater 35; a horizontal low temperature reheater 351; a second heating inlet 3511; a vertical low temperature reheater 352; a final reheater 353; a second heating outlet 3531;
a steam turbine 4; a high pressure cylinder 41; a first steam inlet 411; a second steam outlet 412; the intermediate cylinder 42; a second steam inlet 421; a fifth steam outlet 422; a low pressure cylinder 43; a sixth steam inlet 431; a sixth steam outlet 432;
a first pipe 51; a second conduit 52; a third pipe 53; a sixth pipeline 54; a second water outlet 541; a second water inlet 542;
a condensing device 6; a third steam inlet 61; a first water outlet 62;
a heat regenerative system 7; a first heat recovery device 70; a fourth steam inlet 701; the second regenerative device 71; a fifth steam inlet 711; a third heat exchange means 72; a second heat absorption side inlet 721; a second heat absorption side outlet 722; a second heat release side inlet 723; a second heat release side outlet 724; a first heat return line 73; a second heat return circuit 74; a deaerator 8; a water pump 9;
a generator 200.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A solar coupled steam turbine system 100 according to an embodiment of the present invention is described below with reference to the drawings.
As shown in fig. 1 to 2, a solar turbine system 100 according to an embodiment of the present invention includes a solar heating apparatus 1, a first heat exchanging apparatus 2, a steam generating apparatus 3, and a turbine 4.
The solar heating device 1 is used for converting solar energy into thermal energy, and the solar heating device 1 comprises a first medium inlet 11 and a first medium outlet 12. The first heat exchange device 2 comprises a first heat absorption side inlet 21, a first heat absorption side outlet 22, a first heat release side inlet 23 and a first heat release side outlet 24, wherein the first heat release side inlet 23 is communicated with the first medium outlet 12, and the first heat release side outlet 24 is communicated with the first medium inlet 11. The steam generating device 3 is for heating water to steam, the steam generating device 3 comprising a first water inlet 31 and a first steam outlet 32. The steam turbine 4 includes a high pressure cylinder 41 and a medium pressure cylinder 42, the high pressure cylinder 41 includes a first steam inlet 411 and a second steam outlet 412, the first steam inlet 411 communicates with the first steam outlet 32, the second steam outlet 412 communicates with the first heat absorbing side inlet 21, the medium pressure cylinder 42 includes a second steam inlet 421, and the second steam inlet 421 communicates with the first heat absorbing side outlet 22.
The operation of the solar coupled steam turbine system 100 according to the embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1, water enters the steam generating device 3 through the first water inlet 31 and is processed to form high-temperature and high-pressure main steam, and the main steam exits the steam generating device 3 through the first steam outlet 32; the main steam enters the high-pressure cylinder 41 of the steam turbine 4 through the first steam inlet 411 to do work, and the steam doing the work forms cold reheat steam and is discharged from the second steam outlet 412; the cold reheat steam discharged from the second steam outlet 412 enters the first heat exchange device 2 through the first heat absorption side inlet 21, and the cold reheat steam is heated by exchanging heat with the medium heated by the solar heating device 1 to form hot reheat steam, and the hot reheat steam is discharged from the first heat absorption side outlet 22. The medium heated by the solar heating device 1 is discharged from the first medium outlet 12, enters the first heat exchange device 2 through the first heat release side inlet 23 to exchange heat with cold reheat steam, and is discharged from the first heat release side outlet 24 and enters the solar heating device 1 through the first medium inlet 11 to be reheated; the hot reheat steam exhausted from the first heat absorbing side outlet 22 enters the intermediate pressure cylinder 42 through the second steam inlet 421 to do work.
A steam turbine system in the related art includes a boiler and a steam turbine including an intermediate pressure cylinder and a high pressure cylinder. When a steam turbine system in the related art works, water enters a boiler to be heated to form high-temperature and high-pressure main steam, the main steam enters a high-pressure cylinder to do work to form cold reheat steam, and the cold reheat steam needs to enter the boiler again to be heated so as to form the hot reheat steam for a medium-pressure cylinder to do work. That is, since the boiler needs to heat water to form high-temperature and high-pressure main steam and to reheat the cold reheat steam, the boiler needs to consume a large amount of fuel for heating the cold reheat steam and the water, which results in a high pollutant emission and a high cost of use of the steam turbine 4 system in the related art.
Compared with the related art, the solar-coupled steam turbine system 100 according to the embodiment of the present invention uses the solar heating device 1 to heat the cold reheat steam instead of the steam generating device 3, so that the heat of the fuel consumed by the steam generating device 3 is reduced, and therefore, not only is the fuel amount consumed by the solar-coupled steam turbine system 100 according to the embodiment of the present invention reduced, and the cost is saved, but also the emission of pollutants generated by burning the fuel is reduced.
By using the coupled solar steam turbine system 100 of the embodiment of the invention, a conventional 660MW steam turbine unit (CLN 600-24.2/566/566, once intermediate reheating, 1422.38t/h of reheat steam flow under THA working condition) is taken as an example, the heat consumption of a boiler can be saved by 862.1GJ/h, the standard coal can be saved by conversion by 0.924 calculated according to the heat efficiency of the boiler, the coal quantity can be saved by 27882.1 tons all the year, the carbon dioxide emission can be reduced by 7306711.9 tons all the year, the sulfur dioxide emission can be reduced by 2370.5 tons all the year, and the nitrogen oxide emission can be reduced by 2063.7 tons all the year.
Therefore, the solar turbine system 100 according to the embodiment of the present invention has the advantages of low cost, low energy consumption and environmental protection.
As shown in fig. 1, a power generation system according to an embodiment of the present invention includes a solar coupled turbine system 100 and a generator 200 according to the above embodiment.
The solar-coupled steam turbine system 100 comprises a solar heating device 1, a first heat exchange device 2, a steam generation device 3, a steam turbine 4, a condensing device 6, a deaerating device 8, a regenerative system 7 and a water pump 9.
The solar heating apparatus 1 includes a body 13, a heat storage tank 162, and a second heat exchanging apparatus 161. The body 13 comprises a mirror field and a solar tower, the solar tower is provided with a first medium inlet 11 and a first medium outlet 12, and the mirror field is matched with the solar tower, so that the light energy reflected by the mirror field is received by the solar tower and heats the medium in the solar tower. The medium enters the solar tower from the first medium inlet 11, is heated by the solar tower and then is discharged from the first medium outlet 12.
The first medium inlet 11 is connected to the first heat release side outlet 24, and the first medium outlet 12 is connected to the first heat release side inlet 23. The second heat exchange device 161 has a first heat exchange inlet 1611, a first heat exchange outlet 1612, a second heat exchange inlet 1613 and a second heat exchange outlet 1614, the heat storage tank 162 has a second medium inlet and a second medium outlet, the first heat exchange outlet 1612 is communicated with the first medium inlet 11, the first heat exchange inlet 1611 is communicated with the first medium outlet 12, the second medium inlet is communicated with the second heat exchange inlet 1613, and the second medium outlet is communicated with the second heat exchange outlet 1614.
The solar heating apparatus 1 further includes a fourth pipeline 14 and a fifth pipeline 15, one end of the fourth pipeline 14 is connected to the first medium outlet 12, the other end of the fourth pipeline 14 is connected to the first heat release side inlet 23, one end of the fifth pipeline 15 is connected to the first medium inlet 11, and the other end of the fifth pipeline 15 is connected to the first heat release side outlet 24. The body 13 is connected with the first heat release side inlet 23 through the fourth pipeline 14 so that the heated medium enters the first heat exchange device 2, and the body 13 is connected with the first heat release side outlet 24 through the fifth pipeline 15 so that the heat-exchanged medium returns to the body 13 for heating.
The energy storage device 16 comprises a second heat exchange device 161 and a heat storage tank 162, the second heat exchange device 161 comprises a first heat exchange channel and a second heat exchange channel, the first heat exchange channel comprises a first heat exchange inlet 1611 and a first heat exchange outlet 1612, the first heat exchange inlet 1611 is communicated with the fourth pipeline 14, and the first heat exchange outlet 1612 is communicated with the fifth pipeline 15.
The medium heated by the body 13 is discharged through the first medium outlet 12, a part of the medium enters the first heat exchange channel through the first heat exchange inlet 1611, and the other part of the medium enters the first heat exchange device 2 through the first heat release side inlet 23 to heat the cold reheat steam. The medium in the heat storage tank 162 is discharged from the second heat exchange outlet 1614 and enters the second heat exchange channel, so that the medium discharged from the heat storage tank 162 exchanges heat with the medium in the first heat exchange channel, and the heat medium in the second heat exchange channel after heat exchange returns to the heat storage tank 162, thereby storing a part of heat energy in the heat storage tank 162.
Under the condition of insufficient sunlight, the heat medium in the heat storage tank 162 enters the second heat exchange channel to exchange heat with the medium in the first heat exchange channel so as to heat the medium in the first heat exchange channel. The medium in the first heat exchange channel after heating gets into first heat release side import 23 and heats cold reheat steam and form hot reheat steam to guarantee that hot reheat steam's temperature is stable, make steam turbine 4 can the steady operation.
The steam turbine 4 comprises a high-pressure cylinder 41, an intermediate-pressure cylinder 42 and a low-pressure cylinder 43, the low-pressure cylinder 43 comprises a sixth steam inlet 431 and a sixth steam outlet 432, the intermediate-pressure cylinder 42 further comprises a fifth steam outlet 422, and the steam turbine 4 applies work to drive the generator 200 to generate electricity. The first heat release side inlet 23 of the first heat exchange device 2 is communicated with the first medium outlet 12, and the first heat release side outlet 24 is communicated with the first medium inlet 11.
The first steam inlet 411 of the high pressure cylinder 41 is communicated with the first steam outlet 32, the second steam outlet 412 of the high pressure cylinder 41 is communicated with the first heat absorption side inlet 21, the second steam inlet 421 of the intermediate pressure cylinder 42 is communicated with the first heat absorption side outlet 22, the fifth steam outlet 422 of the intermediate pressure cylinder 42 is connected with the sixth steam inlet 431 of the low pressure cylinder 43, the sixth steam outlet 432 of the low pressure cylinder 43 is communicated with the first water inlet 31, and the condensing device 6, the oxygen removing device 8, the water pump 9 and the heat recovery system 7 are connected between the sixth steam outlet 432 and the first water inlet 31.
Under the condition of sufficient sunlight, the medium heated by the body 13 is discharged through the first medium outlet 12, a part of the medium enters the first heat exchange channel through the first heat exchange inlet 1611, and the other part of the medium enters the first heat exchange device 2 through the first heat release side inlet 23 to heat the cold reheat steam. The medium in the heat storage tank 162 is discharged from the second heat exchange outlet 1614 and enters the second heat exchange channel, so that the medium discharged from the heat storage tank 162 exchanges heat with the medium in the first heat exchange channel, and the heat medium in the second heat exchange channel after heat exchange returns to the heat storage tank 162, thereby storing a part of heat energy in the heat storage tank 162.
Under the condition of insufficient sunlight, the heat medium in the heat storage tank 162 enters the second heat exchange channel to exchange heat with the medium in the first heat exchange channel so as to heat the medium in the first heat exchange channel. The medium in the first heat exchange channel after heating gets into first heat release side import 23 and heats cold reheat steam and form hot reheat steam to guarantee that hot reheat steam's temperature is stable, make steam turbine 4 can the steady operation.
The power generation system provided by the embodiment of the invention has the advantages of low use cost, less energy consumption and environmental protection.
In some embodiments, as shown in fig. 2, the steam generating device 3 comprises a steam generator 33, a first steam heater 34, a second steam heater 35.
The steam generator 33 has a first water inlet 31, a third steam outlet 3341 and a fourth steam outlet 3342; first steam heater 34 includes first heating inlet 3411 and first heating outlet 3431, first heating inlet 3411 being in communication with third steam outlet 3341, first heating outlet 3431 being in communication with first steam outlet 32; and the second steam heater 35 includes a second heating inlet 3511 and a second heating outlet 3531, the second heating inlet 3511 being in communication with the fourth steam outlet 3342, the second heating outlet 3531 being in communication with the first steam outlet 32.
With the solar turbine system 100 according to the embodiment of the present invention, water enters the steam generator 33 through the first water inlet 31 to be heated to form steam, a part of the steam is discharged from the third steam outlet 3341, passes through the first heating inlet 3411, enters the first steam heater 34 to be heated to form high-temperature and high-pressure main steam (24.2 mpa,566 ℃), and the formed main steam is discharged through the first heating outlet 3431. Another part of the steam is discharged from the third steam outlet 3341, enters the second steam heater 35 through the second heating inlet 3511, is heated to form high-temperature and high-pressure main steam, and the formed main steam is discharged through the second heating outlet 3531. The main steam formed after being heated by the first and second steam heaters 34 and 35, respectively, is discharged through the first steam outlet 32.
A related art boiler includes a steam generator having a first outlet and a second outlet, a superheater having a steam inlet and a main steam outlet, and a reheater including a cold reheat steam inlet and a hot reheat steam outlet. The first outlet and the second outlet are communicated with a steam inlet, steam is discharged from the first outlet and the second outlet and enters the superheater to be heated to form main steam, and the main steam is discharged through the main steam outlet so as to be used by a high-pressure cylinder of the steam turbine. The cold reheat steam generated after work is done in the high-pressure cylinder needs to return to the traditional boiler again, and is heated in the reheater entering through the cold reheat steam inlet to form hot reheat steam, and the hot reheat steam is discharged from the hot reheat steam outlet so as to be used by the medium-pressure cylinder.
The steam generating device 3 of the solar turbine system 100, in which the photo-thermal and coal-fired are complementary, according to the embodiment of the present invention, may be simply modified by using a boiler of the related art, in which the first outlet of the steam generator 33 of the boiler of the related art is disconnected from the steam inlet, and the cold and reheat steam inlets of the reheaters are connected to the first outlet of the steam generator 33, so that the reheaters and the superheaters heat the steam generated by the steam generating device 3 together. Therefore, the traditional boiler can be adapted to the solar turbine system 100 with complementary light and coal in the embodiment of the invention only by modifying part of pipelines in the traditional boiler, and the steam generating device 3 is manufactured without large-scale modification or cost expense on the traditional boiler, so that the steam generating device 3 of the solar turbine system 100 with complementary light and heat and coal in the embodiment of the invention is easy to modify in a waste-utilizing manner, and has the advantage of low arrangement cost.
As shown in fig. 2, the steam generating device 3 of the embodiment of the present invention includes a steam generator 33, a first steam heater 34, and a second steam heater 35.
The steam generator 33 includes an economizer 331, a water wall 332, a steam-water separator 333, and a horizontal low-temperature superheater 334. The economizer 331 is provided with a first water inlet 31, and the economizer 331, the water wall 332, the steam-water separator 333 and the horizontal low-temperature superheater 334 are connected in sequence. The economizer 331 and the water wall 332 are used for heating water to generate steam, the steam-water separator 333 is used for separating evaporated water in the steam, the separated water returns to the water wall 332 to be heated and evaporated, and the horizontal low-temperature superheater 334 comprises a third steam outlet 3341 and a fourth steam outlet 3342.
The first steam heater 34 includes a vertical low temperature superheater 341, a platen superheater 342, and a finishing superheater 343. The vertical low-temperature superheater 341 comprises a first heating inlet 3411, the finishing superheater 343 comprises a first heating outlet 3431, the first heating inlet 3411 is communicated with a third steam outlet 3341, and the vertical low-temperature superheater 341, the platen superheater 342 and the finishing superheater 343 are communicated in sequence, so that the heating steam forms main steam with high temperature and high pressure.
The second steam heater 35 includes a horizontal low-temperature reheater 351, a vertical low-temperature reheater 352, and a final stage reheater 353. Wherein the horizontal low-temperature reheater 351 includes a second heating inlet 3511, the final stage reheater 353 has a second heating outlet 3531, the second heating inlet 3511 is communicated with the fourth steam outlet 3342, and the horizontal low-temperature reheater 351, the vertical low-temperature reheater 352 and the final stage reheater 353 are sequentially communicated, so as to heat the steam to form main steam with high temperature and high pressure.
In some embodiments, as shown in FIG. 1, a solar coupled steam turbine system 100 of an embodiment of the present invention includes a first pipeline 51, a second pipeline 52, and a third pipeline 53.
One end of the first pipe 51 is connected to the first steam outlet 32, and the other end of the first pipe 51 is connected to the first steam inlet 411; one end of the second pipe 52 is connected to the second steam outlet 412, and the other end of the second pipe 52 is connected to the first heat absorbing side inlet 21; one end of the third pipe 53 is connected to the first heat absorbing side outlet 22, and the third pipe 53 is connected to the second steam inlet 421.
In other words, the high pressure cylinder 41 communicates with the steam generating device 3 through the first pipe 51 so that the main steam generated by the steam generating device 3 enters the high pressure cylinder 41. High pressure cylinder 41 is connected to first heat exchange device 2 through second conduit 52, so that first heat exchange device 2 heats the cold reheat steam discharged from high pressure cylinder 41, thereby forming hot reheat steam. The intermediate pressure cylinder 42 is in communication with the first heat exchanging means 2 through a third line 53 so that the hot reheat steam enters the intermediate pressure cylinder 42.
In some embodiments, as shown in FIG. 1, a solar coupled steam turbine system 100 of an embodiment of the present invention further includes a condensing unit 6.
The condensing means 6 comprises a third steam inlet 61 and a first water outlet 62; the intermediate pressure cylinder 42 has a fourth steam outlet 3342, the third steam inlet 61 of the condensing means 6 is connected to the fourth steam outlet 3342, and the first water outlet 62 of the condensing means 6 is connected to the first water inlet 31.
In other words, the intermediate pressure cylinder 42 is communicated with the condensing device 6, so that the steam discharged from the intermediate pressure cylinder 42 is condensed into water by the condensing device 6, and the condensing device 6 is communicated with the first water inlet 31, so that the condensed water enters the steam generating device 3 for recycling, thereby improving the utilization rate of the water.
Specifically, the fifth steam outlet 422 of the intermediate pressure cylinder 42 is connected to the sixth steam inlet 431 of the low pressure cylinder 43, and the sixth steam outlet 432 of the low pressure cylinder 43 is communicated with the condensing device 6, thereby communicating the intermediate pressure cylinder 42 with the condensing device 6.
In some embodiments, as shown in fig. 1, a solar coupled steam turbine system 100 of an embodiment of the present invention further includes a regenerative system 7, where regenerative system 7 includes a third heat exchange device 72, a first heat return circuit 73, and a second heat return circuit 74.
The third heat exchange device 72 comprises a second heat absorption side inlet 721, a second heat absorption side outlet 722, a second heat release side inlet 723 and a second heat release side outlet 724, wherein the second heat release side inlet 723 is communicated with the first heat release side outlet 24, and the second heat release side outlet 724 is connected with the first medium inlet 11. One end of the first heat return circuit 73 is connected to the second heat absorption side inlet 721, the other end of the first heat return circuit 73 is communicated with the first water outlet, one end of the second heat return circuit 74 is connected to the second heat absorption side outlet 722, and the other end of the second heat return circuit 74 is communicated with the first water inlet 31.
The water discharged from the condensing device 6 enters the third heat exchanging device 72 from the first heat returning pipeline 73, and the water is heated by the third heat exchanging device 72 by using the waste heat after the heat exchange between the solar heating device 1 and the first heat exchanging device 2, so that the water temperature of the condensed water is increased, and the heat quantity required to be released when the steam generating device 3 heats the water is further reduced, thereby further reducing the fuel quantity consumed by the solar turbine system 100 coupled with the solar energy and the pollutant discharge quantity generated by burning the fuel.
In some embodiments, as shown in fig. 1, the solar turbine system 100 further includes a sixth pipeline 54, the regenerative system includes a first regenerative device 70 and a second regenerative device 71, one end of the sixth pipeline 54 is connected to the first water inlet 31, the other end of the sixth pipeline 54 is connected to the first water outlet 62, the sixth pipeline 54 includes a second water inlet 542 and a second water outlet 541, the other end of the first regenerative pipeline 73 is communicated with the first water outlet 62, the other end of the second regenerative pipeline 74 is communicated with the first water inlet 31, the first regenerative device 70 and the second regenerative device 71 are both used for heating water in the sixth pipeline 54, the first regenerative device 70 and the second regenerative device 71 are both disposed on the sixth pipeline 54, the first regenerative device 70 includes a fourth steam inlet 701, the fourth steam inlet 701 is communicated with at least one of the high pressure cylinder 41 and the medium pressure cylinder 42, the first regenerative device 70 is disposed between the second water inlet 542 and the second water outlet 541, and the second regenerative device 71 includes a fifth steam inlet 711, the fifth steam inlet 711 is communicated with at least one of the high pressure cylinder 41, the medium pressure cylinder 42 is disposed between the second regenerative device 71 and the second water inlet 71.
In other words, the steam in at least one of the high pressure cylinder 41 and the medium pressure cylinder 42 enters the first heat recovery device 70 through the fourth steam inlet 701, and the steam in at least one of the high pressure cylinder 41 and the medium pressure cylinder 42 enters the first heat recovery device 71 through the fifth steam inlet 711, so that the steam exchanges heat with the condensed water in the sixth pipeline 54 to heat the condensed water.
It can be understood that the heat regenerator 71 heats the condensed water in the sixth pipeline 54 by using the steam in the high pressure cylinder 41 and/or the low pressure cylinder 43, so that the second heat regenerator 71 assists to heat the condensed water in the sixth pipeline 54 under the condition of insufficient sunlight, that is, when the heat provided by the solar heating apparatus 1 is insufficient, thereby improving the heat utilization rate of the steam.
In some embodiments, as shown in fig. 1, the solar coupled steam turbine system 100 of the present invention further includes a water pump 9, and the water pump 9 is disposed on the sixth pipeline 54. The water pump 9 is used to drive the condensed water in the sixth pipeline 54 to flow, so that the condensed water enters the first water inlet 31.
In some embodiments, as shown in fig. 1, the solar coupled steam turbine system 100 of an embodiment of the present invention further includes a deaerator 8, and the deaerator 8 is disposed on the sixth pipeline 54. The oxygen removing device 8 can remove oxygen in the condensed water in the sixth pipeline 54, so that the steam formed after the condensed water is reheated and evaporated is ensured not to contain oxygen, and the steam cannot corrode the steam turbine 4.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. A solar-coupled steam turbine system, comprising:
a solar heating device for converting solar energy into thermal energy, the solar heating device comprising a first medium inlet and a first medium outlet;
the first heat exchange device comprises a first heat absorption side inlet, a first heat absorption side outlet, a first heat release side inlet and a first heat release side outlet, the first heat release side inlet is communicated with the first medium outlet, and the first heat release side outlet is communicated with the first medium inlet;
a steam generating device for evaporating water to steam, the steam generating device comprising a first water inlet and a first steam outlet;
the steam turbine comprises a high-pressure cylinder and an intermediate-pressure cylinder, the high-pressure cylinder comprises a first steam inlet and a second steam outlet, the first steam inlet is communicated with the first steam outlet, the second steam outlet is communicated with the first heat absorption side inlet,
the intermediate pressure cylinder comprises a second steam inlet which is communicated with the first heat absorption side outlet.
2. The solar coupled turbine system of claim 1, wherein the steam generation plant comprises:
a steam generator having the first water inlet, a third steam outlet, and a fourth steam outlet;
a first steam heater comprising a first heating inlet and a first heating outlet, the first heating inlet being in communication with the third steam outlet, the first heating outlet being in communication with the first steam outlet; and
and the second steam heater comprises a second heating inlet and a second heating outlet, the second heating inlet is communicated with the fourth steam outlet, and the second heating outlet is communicated with the first steam outlet.
3. The solar coupled turbine system of claim 1, further comprising:
one end of the first pipeline is connected with the first steam outlet, and the other end of the first pipeline is connected with the first steam inlet;
one end of the second pipeline is connected with the second steam outlet, and the other end of the second pipeline is connected with the first heat absorption side inlet;
and one end of the third pipeline is connected with the first heat absorption side outlet, and the third pipeline is connected with the second steam inlet.
4. The solar coupled turbine system of claim 1, wherein the solar heating apparatus further comprises:
a body having a first media inlet and a first media outlet;
one end of the fourth pipeline is connected with the first medium outlet, and the other end of the fourth pipeline is connected with the first heat release side inlet;
and one end of the fifth pipeline is connected with the first medium inlet, and the other end of the fifth pipeline is connected with the first heat release side outlet.
5. The solar coupled turbine system of claim 4, wherein the solar heating device further comprises an energy storage device, the energy storage device comprising:
a second heat exchange device, the second heat exchange device comprising a first heat exchange channel and a second heat exchange channel, the first heat exchange channel comprising a first heat exchange inlet and a first heat exchange outlet, the first heat exchange inlet being in communication with the fourth pipeline, the first heat exchange outlet being in communication with the fifth pipeline,
the heat storage tank comprises a second medium inlet and a second medium outlet, the second heat exchange channel comprises a second heat exchange inlet and a second heat exchange outlet, the second medium inlet is communicated with the second heat exchange inlet, and the second medium outlet is communicated with the second heat exchange outlet.
6. The solar coupled turbine system of claim 1, further comprising:
the condensing device comprises a third steam inlet and a first water outlet, the intermediate pressure cylinder is provided with a fifth steam outlet, the third steam inlet is communicated with the fifth steam outlet, and the first water outlet is communicated with the first water inlet.
7. The solar coupled steam turbine system of claim 6, further comprising a regenerative system comprising a third heat exchange device, a first regenerative circuit, and a second regenerative circuit,
the third heat exchange device comprises a second heat absorption side inlet, a second heat absorption side outlet, a second heat release side inlet and a second heat release side outlet, the second heat release side inlet is communicated with the first heat release side outlet, the second heat release side outlet is connected with the first medium inlet,
one end of the first heat return pipeline is connected with the second heat absorption side inlet, the other end of the first heat return pipeline is communicated with the first water outlet, one end of the second heat return pipeline is connected with the second heat absorption side outlet, and the other end of the second heat return pipeline is communicated with the first water inlet.
8. The solar coupled turbine system of claim 7, further comprising a sixth pipeline, the recuperator system comprising a first recuperator and a second recuperator,
one end of the sixth pipeline is connected with the first water inlet, the other end of the sixth pipeline is connected with the first water outlet, the sixth pipeline comprises a second water inlet and a second water outlet, the other end of the first heat-return pipeline is communicated with the first water outlet, the other end of the second heat-return pipeline is communicated with the first water inlet,
the first heat recovery device and the second heat recovery device are both used for heating water in the sixth pipeline, the first heat recovery device and the second heat recovery device are both arranged on the sixth pipeline,
the first heat-recovery device comprises a fourth steam inlet communicated with at least one of the high-pressure cylinder and the intermediate-pressure cylinder, the first heat-recovery device is positioned between the second water inlet and the second water outlet,
the second heat recovery device comprises a fifth steam inlet, the fifth steam inlet is communicated with at least one of the high-pressure cylinder and the intermediate-pressure cylinder, and the second heat recovery device is positioned between the second water inlet and the first water inlet.
9. The solar coupled turbine system of claim 8, further comprising: and the oxygen removing device is arranged on the sixth pipeline.
10. A power generation system, comprising:
a generator;
a steam turbine system, the steam turbine system being the solar coupled steam turbine system of any one of claims 1-9.
CN202210986656.XA 2022-08-17 2022-08-17 Solar energy coupled steam turbine system and power generation system Pending CN115288960A (en)

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CN202210986656.XA CN115288960A (en) 2022-08-17 2022-08-17 Solar energy coupled steam turbine system and power generation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210986656.XA CN115288960A (en) 2022-08-17 2022-08-17 Solar energy coupled steam turbine system and power generation system

Publications (1)

Publication Number Publication Date
CN115288960A true CN115288960A (en) 2022-11-04

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Country Status (1)

Country Link
CN (1) CN115288960A (en)

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