Solar-coupled steam turbine system and power generation system

Abstract

The present invention provides a solar-coupled steam turbine system and power generation system. The solar-coupled steam turbine system includes: a solar heating device for converting solar energy into thermal energy; a first heat exchange device; a steam turbine; and a steam generator for evaporating water into steam. The solar heating device includes a first medium inlet and a first medium outlet; the first heat exchange device includes a first heat-absorbing side inlet, a first heat-absorbing side outlet, a first heat-releasing side inlet, and a first heat-releasing side outlet, the first heat-releasing side inlet communicating with the first medium outlet, and the first heat-releasing side outlet communicating with the first medium inlet; the steam generator includes a first water inlet and a first steam outlet; and the steam turbine includes a high-pressure cylinder and an intermediate-pressure cylinder. The high-pressure cylinder includes a first steam inlet and a second steam outlet, the first steam inlet communicating with the first steam outlet, and the second steam outlet communicating with the first heat-absorbing side inlet. The solar-coupled steam turbine system of the present invention has the advantage of low operating cost.

Description

Technical Field

[0001] The present invention relates to the technical field of steam turbine power generation, and in particular to a steam turbine system and a power generation system coupled with solar energy. Background Art

[0002] A steam turbine is a rotary steam-powered device and a key component of modern thermal power generation. Conventional steam turbine power generation systems utilize the turbine to generate power, which in turn drives an engine to generate electricity. However, these systems often use a high amount of coal, resulting in high pollutant emissions and high power generation costs. Summary of the Invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention provides a solar-coupled steam turbine system, which has the advantages of low cost, low energy consumption, and environmental protection.

[0005] An embodiment of the present invention further provides a power generation system, which includes the solar energy-coupled steam turbine system of the above embodiment.

[0006] The solar energy coupled steam turbine system of an embodiment of the present invention includes: a solar heating device for converting solar energy into thermal energy, the solar heating device including a first medium inlet and a first medium outlet; a first heat exchange device, the first heat exchange device including 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 connected to the first medium outlet, and the first heat release side outlet is connected to the first medium inlet; a steam generating device for evaporating water into steam, the steam generating device including a first water inlet and a first steam outlet; a steam turbine, the steam turbine including a high-pressure cylinder and an intermediate-pressure cylinder, the high-pressure cylinder including a first steam inlet and a second steam outlet, the first steam inlet is connected to the first steam outlet, the second steam outlet is connected to the first heat absorption side inlet, and the intermediate-pressure cylinder including a second steam inlet, and the second steam inlet is connected to the first heat absorption side outlet.

[0007] The solar-coupled steam turbine system of the embodiment of the present invention utilizes a solar heating device instead of a steam generating device to heat the cold reheat steam, thereby reducing the amount of heat of the fuel required to be consumed by the steam generating device. Therefore, not only the amount of fuel consumed by the solar-coupled steam turbine system of the embodiment of the present invention is reduced, thus saving costs, but also the emission of pollutants generated by burning fuel is reduced.

[0008] Therefore, the solar-energy-coupled steam turbine system according to the embodiment of the present invention has the advantages of low cost, low energy consumption, and environmental protection.

[0009] In some embodiments, the steam generating device includes: a steam generator having the first water inlet, the third steam outlet and the fourth steam outlet; a first steam heater, the first steam heater including a first heating inlet and a first heating outlet, the first heating inlet being connected to the third steam outlet, and the first heating outlet being connected to the first steam outlet; and a second steam heater, the second steam heater including a second heating inlet and a second heating outlet, the second heating inlet being connected to the fourth steam outlet, and the second heating outlet being connected to the first steam outlet.

[0010] In some embodiments, the solar-coupled steam turbine system further includes: a first pipeline, one end of the first pipeline is connected to the first steam outlet, and the other end of the first pipeline is connected to the first steam inlet; a second pipeline, one end of the second pipeline is connected to the second steam outlet, and the other end of the second pipeline is connected to the first heat absorption side inlet; a third pipeline, one end of the third pipeline is connected to the first heat absorption side outlet, and the third pipeline is connected to the second steam inlet.

[0011] In some embodiments, the solar heating device further includes: a main body, the main body having a first medium inlet and a first medium outlet; a fourth pipeline, one end of the fourth pipeline is connected to the first medium outlet, and the other end of the fourth pipeline is connected to the first heat release side inlet; a fifth pipeline, one end of the fifth pipeline is connected to the first medium inlet, and the other end of the fifth pipeline is connected to the first heat release side outlet.

[0012] In some embodiments, the solar heating device further includes an energy storage device, which includes: a second heat exchange device, the second heat exchange device includes a first heat exchange channel and a second heat exchange channel, the first heat exchange channel includes a first heat exchange inlet and a first heat exchange outlet, the first heat exchange inlet is connected to the fourth pipeline, the first heat exchange outlet is connected to the fifth pipeline, a heat storage tank, the heat storage tank includes a second medium inlet and a second medium outlet, the second heat exchange channel includes a second heat exchange inlet and a second heat exchange outlet, the second medium inlet is connected to the second heat exchange inlet, and the second medium outlet is connected to the second heat exchange outlet.

[0013] In some embodiments, the solar-coupled steam turbine system further includes: a condensing device, the condensing device including a third steam inlet and a first water outlet, the intermediate pressure cylinder having a fifth steam outlet, the third steam inlet being connected to the fifth steam outlet, and the first water outlet being connected to the first water inlet.

[0014] In some embodiments, the solar-coupled steam turbine system further includes a heat recovery system, which includes a third heat exchange device, a first heat recovery pipe and a second heat recovery pipe. The third heat exchange device includes 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 connected to the first heat release side outlet, and the second heat release side outlet is connected to the first medium inlet. One end of the first heat recovery pipe is connected to the second heat absorption side inlet, and the other end of the first heat recovery pipe is connected to the first water outlet. One end of the second heat recovery pipe is connected to the second heat absorption side outlet, and the other end of the second heat recovery pipe is connected to the first water inlet.

[0015] In some embodiments, the solar-coupled steam turbine system further includes a sixth pipeline, the heat recovery system includes a first heat recovery device and a second heat recovery device, one end of the sixth pipeline is connected to the first water inlet, and 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 heat recovery pipeline is connected to the first water outlet, and the other end of the second heat recovery pipeline is connected to the first water inlet, the first heat recovery device and the second heat recovery device are both used to heat water in the sixth pipeline, the first heat recovery device and the second heat recovery device are both provided on the sixth pipeline, the first heat recovery device includes a fourth steam inlet, the fourth steam inlet is connected to at least one of the high-pressure cylinder and the intermediate-pressure cylinder, the first heat recovery device is located between the second water inlet and the second water outlet, the second heat recovery device includes a fifth steam inlet, the fifth steam inlet is connected to at least one of the high-pressure cylinder and the intermediate-pressure cylinder, and the second heat recovery device is located between the second water inlet and the first water inlet.

[0016] In some embodiments, the solar-coupled steam turbine system further comprises: a deoxygenation device, wherein the deoxygenation device is provided on the sixth pipeline.

[0017] The solar-energy-coupled steam turbine system power generation system according to the embodiment of the present invention includes: a generator; and a steam turbine system, wherein the steam turbine system is the solar-energy-coupled steam turbine system according to any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the structure of a solar-coupled steam turbine system according to an embodiment of the present invention.

[0019] Figure 2 Schematic diagram of the structure of a steam generating device according to an embodiment of the present invention.

[0020] Reference numerals:

[0021] A solar-coupled steam turbine system 100;

[0022] Solar heating device 1; first medium inlet 11; first medium outlet 12; body 13; fourth pipeline 14; fifth pipeline 15; energy storage device 16; second heat exchange device 161; first heat exchange inlet 1611; first heat exchange outlet 1612; second heat exchange inlet 1613; second heat exchange outlet 1614; heat storage tank 162;

[0023] First heat exchange device 2; first heat absorbing side inlet 21; first heat absorbing side outlet 22; first heat releasing side inlet 23; first heat releasing side outlet 24;

[0024] Steam generating device 3; first water inlet 31; first steam outlet 32; steam generator 33; economizer 331; water wall 332; steam-water separator 333; horizontal low-temperature superheater 334; third steam outlet 3341; fourth steam outlet 3342; first steam heater 34; vertical low-temperature superheater 341; first heating inlet 3411; platen superheater 342; final superheater 343; first heating outlet 3431; second steam heater 35; horizontal low-temperature reheater 351; second heating inlet 3511; vertical low-temperature reheater 352; final reheater 353; second heating outlet 3531;

[0025] Steam turbine 4; high-pressure cylinder 41; first steam inlet 411; second steam outlet 412; intermediate-pressure cylinder 42; second steam inlet 421; fifth steam outlet 422; low-pressure cylinder 43; sixth steam inlet 431; sixth steam outlet 432;

[0026] First pipeline 51; second pipeline 52; third pipeline 53; sixth pipeline 54; second water outlet 541; second water inlet 542;

[0027] Condensing device 6; third steam inlet 61; first water outlet 62;

[0028] Reheat system 7; first reheat device 70; fourth steam inlet 701; second reheat device 71; fifth steam inlet 711; third heat exchange device 72; second heat absorption side inlet 721; second heat absorption side outlet 722; second heat release side inlet 723; second heat release side outlet 724; first reheat pipeline 73; second reheat pipeline 74; deaerator 8; water pump 9;

[0029] Generator 200. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0031] A solar-powered steam turbine system 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0032] like Figure 1-Figure 2 As shown, the solar-energy-coupled steam turbine system 100 according to the embodiment of the present invention includes a solar heating device 1 , a first heat exchange device 2 , a steam generating device 3 and a steam turbine 4 .

[0033] The solar heating device 1 is used to convert solar energy into thermal energy and includes a first medium inlet 11 and a first medium outlet 12. The first heat exchange device 2 includes 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. The first heat release side inlet 23 is connected to the first medium outlet 12, and the first heat release side outlet 24 is connected to the first medium inlet 11. The steam generator 3 is used to heat water into steam and includes a first water inlet 31 and a first steam outlet 32. The steam turbine 4 includes a high-pressure cylinder 41 and an intermediate-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 is connected to the first steam outlet 32, and the second steam outlet 412 is connected to the first heat absorption side inlet 21. The intermediate-pressure cylinder 42 includes a second steam inlet 421, which is connected to the first heat absorption side outlet 22.

[0034] The operation process of the solar-coupled steam turbine system 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0035] like Figure 1 As shown, 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 is discharged from 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 perform work, and the steam that has performed 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, so that the cold reheat steam exchanges heat with the medium heated by the solar heating device 1, thereby heating the cold reheat steam to form hot reheat steam, and the hot reheat steam is discharged from the first heat absorption side outlet 22. Among them, 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 the cold reheat steam, and the medium after heat exchange 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 heated again; the hot reheat steam discharged from the first heat absorption side outlet 22 enters the intermediate pressure cylinder 42 through the second steam inlet 421 to perform work.

[0036] The steam turbine system in the related art includes a boiler and a steam turbine, and the steam turbine includes an intermediate-pressure cylinder and a high-pressure cylinder. When the steam turbine system in the related art is in operation, water enters the boiler for heating to form high-temperature, high-pressure main steam. The main steam enters the high-pressure cylinder to perform work and forms cold reheat steam. The cold reheat steam needs to enter the boiler again for heating to form hot reheat steam to provide work for the intermediate-pressure cylinder. In other words, the boiler not only needs to heat water to form high-temperature, high-pressure main steam, but also needs to reheat the cold reheat steam. Therefore, the boiler consumes a lot of fuel to heat the cold reheat steam and water, resulting in high pollutant emissions and high operating costs of the steam turbine system in the related art.

[0037] Compared with the related art, the solar-coupled steam turbine system 100 of the embodiment of the present invention utilizes the solar heating device 1 instead of the steam generating device 3 to heat the cold reheat steam, thereby reducing the heat of the fuel required to be consumed by the steam generating device 3. Therefore, not only the amount of fuel consumed by the solar-coupled steam turbine system 100 of the embodiment of the present invention is reduced, thus saving costs, but also the emission of pollutants generated by burning fuel is reduced.

[0038] By using the solar-coupled steam turbine system 100 according to an embodiment of the present invention, taking a conventional 660MW steam turbine unit (CLN600-24.2 / 566 / 566, single intermediate reheat, and a reheat steam flow rate of 1422.38 t / h under THA conditions) as an example, the boiler heat consumption can be saved by 862.1 GJ / h. Calculated based on a boiler thermal efficiency of 0.924, this is equivalent to saving 31.84 t / h of standard coal, saving 27,882.1 tons of coal per year, reducing carbon dioxide emissions by 7,306,711.9 tons per year, reducing sulfur dioxide emissions by 2,370.5 tons per year, and reducing nitrogen oxide emissions by 2,063.7 tons per year.

[0039] Therefore, the solar-coupled steam turbine system 100 according to the embodiment of the present invention has the advantages of low cost, low energy consumption, and environmental protection.

[0040] like Figure 1 As shown, the power generation system according to the embodiment of the present invention includes the solar-coupled steam turbine system 100 and the generator 200 according to the above embodiment.

[0041] The solar-coupled steam turbine system 100 includes a solar heating device 1 , a first heat exchange device 2 , a steam generating device 3 , a steam turbine 4 , a condensing device 6 , a deoxidizing device 8 , a heat recovery system 7 and a water pump 9 .

[0042] The solar heating device 1 includes a main body 13, a heat storage tank 162, and a second heat exchange device 161. The main body 13 includes a mirror field and a solar tower. The solar tower has a first medium inlet 11 and a first medium outlet 12. The mirror field and the solar tower cooperate so that light reflected by the mirror field is received by the solar tower and heats the medium within the solar tower. The medium enters the solar tower through the first medium inlet 11 and, after being heated by the solar tower, is discharged through the first medium outlet 12.

[0043] 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 connected to the first medium inlet 11, the first heat exchange inlet 1611 is connected to the first medium outlet 12, the second medium inlet is connected to the second heat exchange inlet 1613, and the second medium outlet is connected to the second heat exchange outlet 1614.

[0044] Solar heating device 1 further includes a fourth pipeline 14 and a fifth pipeline 15. One end of fourth pipeline 14 is connected to first medium outlet 12, and the other end of fourth pipeline 14 is connected to first heat release side inlet 23. One end of fifth pipeline 15 is connected to first medium inlet 11, and the other end of fifth pipeline 15 is connected to first heat release side outlet 24. The main body 13 is connected to the first heat release side inlet 23 via fourth pipeline 14, allowing the heated medium to enter the first heat exchange device 2. The main body 13 is connected to the first heat release side outlet 24 via fifth pipeline 15, allowing the heat exchanged medium to return to the main body 13 for heating.

[0045] The energy storage device 16 includes a second heat exchange device 161 and a heat storage tank 162. The second heat exchange device 161 includes a first heat exchange channel and a second heat exchange channel. The first heat exchange channel includes a first heat exchange inlet 1611 and a first heat exchange outlet 1612. The first heat exchange inlet 1611 is connected to the fourth pipeline 14, and the first heat exchange outlet 1612 is connected to the fifth pipeline 15.

[0046] The heated medium from body 13 is discharged through first medium outlet 12. A portion of the medium enters the first heat exchange channel through first heat exchange inlet 1611, while another portion enters first heat exchange device 2 through first heat release inlet 23 to heat the cold reheat steam. The medium in heat storage tank 162 is discharged through second heat exchange outlet 1614 and enters the second heat exchange channel, exchanging heat with the medium in the first heat exchange channel. After heat exchange, the heated medium in the second heat exchange channel returns to heat storage tank 162, storing a portion of the thermal energy therein.

[0047] When sunlight is insufficient, 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, thereby heating the medium in the first heat exchange channel. The heated medium in the first heat exchange channel enters the first heat release side inlet 23 to heat the cold reheat steam to form hot reheat steam, thereby ensuring the temperature of the hot reheat steam is stable, allowing the steam turbine 4 to operate stably.

[0048] The steam turbine 4 includes a high-pressure cylinder 41, an intermediate-pressure cylinder 42, and a low-pressure cylinder 43. The low-pressure cylinder 43 includes a sixth steam inlet 431 and a sixth steam outlet 432. The intermediate-pressure cylinder 42 also includes a fifth steam outlet 422. The steam turbine 4 generates power to drive the generator 200 to generate electricity. The first heat release side inlet 23 of the first heat exchange device 2 is connected to the first medium outlet 12, and the first heat release side outlet 24 is connected to the first medium inlet 11.

[0049] The first steam inlet 411 of the high-pressure cylinder 41 is connected to the first steam outlet 32, the second steam outlet 412 of the high-pressure cylinder 41 is connected to the first heat absorption side inlet 21, the second steam inlet 421 of the intermediate-pressure cylinder 42 is connected to the first heat absorption side outlet 22, 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 connected to the first water inlet 31, wherein a condensing device 6, a deoxygenating device 8, a water pump 9 and a heat recovery system 7 are connected between the sixth steam outlet 432 and the first water inlet 31.

[0050] In the presence of sufficient sunlight, the medium heated by the main body 13 is discharged through the first medium outlet 12. A portion of the medium enters the first heat exchange channel through the first heat exchange inlet 1611, while the remaining portion 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, exchanging heat with the medium in the first heat exchange channel. After the heat exchange, the hot medium in the second heat exchange channel returns to the heat storage tank 162, thereby storing a portion of the thermal energy in the heat storage tank 162.

[0051] When sunlight is insufficient, 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, thereby heating the medium in the first heat exchange channel. The heated medium in the first heat exchange channel enters the first heat release side inlet 23 to heat the cold reheat steam to form hot reheat steam, thereby ensuring the temperature of the hot reheat steam is stable, allowing the steam turbine 4 to operate stably.

[0052] The power generation system of the embodiment of the present invention has the advantages of low cost, low energy consumption and environmental protection.

[0053] In some embodiments, as Figure 2As shown, the steam generating device 3 includes a steam generator 33 , a first steam heater 34 , and a second steam heater 35 .

[0054] The steam generator 33 has a first water inlet 31, a third steam outlet 3341 and a fourth steam outlet 3342; the first steam heater 34 includes a first heating inlet 3411 and a first heating outlet 3431, the first heating inlet 3411 is connected to the third steam outlet 3341, and the first heating outlet 3431 is connected to the 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 is connected to the fourth steam outlet 3342, and the second heating outlet 3531 is connected to the first steam outlet 32.

[0055] In the solar-coupled steam turbine system 100 according to an embodiment of the present invention, water enters the steam generator 33 through the first water inlet 31 and is heated to form steam. A portion of the steam is discharged from the third steam outlet 3341, passes through the first heating inlet 3411, and enters the first steam heater 34 to be heated to form high-temperature, high-pressure main steam (24.2 MPa, 566°C). The resulting main steam is then discharged through the first heating outlet 3431. Another portion of the steam is discharged from the third steam outlet 3341, passes through the second heating inlet 3511, and enters the second steam heater 35 to be heated to form high-temperature, high-pressure main steam. The resulting main steam is then discharged through the second heating outlet 3531. The main steam generated by heating in the first steam heater 34 and the second steam heater 35 is then discharged through the first steam outlet 32.

[0056] The boiler in the related art includes a steam generator, a superheater, and a reheater. The steam generator has a first outlet and a second outlet, the superheater has a steam inlet and a main steam outlet, and the reheater includes a cold reheat steam inlet and a hot reheat steam outlet. The first outlet and the second outlet are both connected to the steam inlet. Steam is discharged from the first outlet and the second outlet and enters the superheater to be heated to form main steam. The main steam is discharged through the main steam outlet for use in the high-pressure cylinder of the steam turbine. The cold reheat steam generated after work in the high-pressure cylinder needs to be returned to the traditional boiler again. It is heated in the reheater through the cold reheat steam inlet to form hot reheat steam. The hot reheat steam is discharged through the hot reheat steam outlet for use in the intermediate-pressure cylinder.

[0057] The steam generating device 3 of the solar-thermal and coal-fired complementary solar-energy-coupled steam turbine system 100 according to the embodiment of the present invention can be simply modified using a boiler in the related art. The first outlet of the steam generator 33 of the boiler in the related art is disconnected from the steam inlet, and the cold reheat steam inlet of the reheater is connected to the first outlet of the steam generator 33, so that the reheater and the superheater jointly heat the steam generated by the steam generating device 3. Thus, only some of the piping within the conventional boiler needs to be modified to adapt the conventional boiler to the solar-thermal and coal-fired complementary solar-energy-coupled steam turbine system 100 according to the embodiment of the present invention. There is no need to perform large-scale modifications on the conventional boiler or incur the cost of manufacturing the steam generating device 3. Therefore, the steam generating device 3 of the solar-thermal and coal-fired complementary solar-energy-coupled steam turbine system 100 according to the embodiment of the present invention is easy to recycle and has the advantage of low installation cost.

[0058] like Figure 2 As shown, 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 .

[0059] The steam generator 33 includes an economizer 331, a water-cooled wall 332, a steam-water separator 333, and a horizontal low-temperature superheater 334. The economizer 331 has a first water inlet 31. The economizer 331, water-cooled wall 332, steam-water separator 333, and horizontal low-temperature superheater 334 are sequentially connected. The economizer 331 and water-cooled wall 332 heat water to generate steam. The steam-water separator 333 separates the unevaporated water from the steam, which is then returned to the water-cooled wall 332 for heating and evaporation. The horizontal low-temperature superheater 334 includes a third steam outlet 3341 and a fourth steam outlet 3342.

[0060] The first steam heater 34 includes a vertical low-temperature superheater 341, a platen superheater 342, and a final superheater 343. The vertical low-temperature superheater 341 includes a first heating inlet 3411, and the final superheater 343 has a first heating outlet 3431. The first heating inlet 3411 is connected to the third steam outlet 3341. The vertical low-temperature superheater 341, the platen superheater 342, and the final superheater 343 are connected in sequence, thereby heating the steam to form high-temperature and high-pressure main steam.

[0061] The second steam heater 35 includes a horizontal low-temperature reheater 351, a vertical low-temperature reheater 352, and a final-stage reheater 353. The horizontal low-temperature reheater 351 includes a second heating inlet 3511, and the final-stage reheater 353 has a second heating outlet 3531. The second heating inlet 3511 is connected to the fourth steam outlet 3342. The horizontal low-temperature reheater 351, the vertical low-temperature reheater 352, and the final-stage reheater 353 are connected in sequence, thereby heating the steam to form high-temperature and high-pressure main steam.

[0062] In some embodiments, as Figure 1 As shown, the solar-coupled steam turbine system 100 according to the embodiment of the present invention further includes a first pipeline 51 , a second pipeline 52 and a third pipeline 53 .

[0063] One end of the first pipeline 51 is connected to the first steam outlet 32, and the other end of the first pipeline 51 is connected to the first steam inlet 411; one end of the second pipeline 52 is connected to the second steam outlet 412, and the other end of the second pipeline 52 is connected to the first heat absorption side inlet 21; one end of the third pipeline 53 is connected to the first heat absorption side outlet 22, and the third pipeline 53 is connected to the second steam inlet 421.

[0064] In other words, the high-pressure cylinder 41 is connected to the steam generator 3 via the first pipeline 51, allowing the main steam generated by the steam generator 3 to enter the high-pressure cylinder 41. The high-pressure cylinder 41 is also connected to the first heat exchange device 2 via the second pipeline 52, allowing the first heat exchange device 2 to heat the cold reheat steam discharged from the high-pressure cylinder 41, thereby generating hot reheat steam. The intermediate-pressure cylinder 42 is connected to the first heat exchange device 2 via the third pipeline 53, allowing the hot reheat steam to enter the intermediate-pressure cylinder 42.

[0065] In some embodiments, as Figure 1 As shown, the solar-energy-coupled steam turbine system 100 according to the embodiment of the present invention further includes a condensing device 6 .

[0066] The condensing device 6 includes 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 device 6 is connected to the fourth steam outlet 3342, and the first water outlet 62 of the condensing device 6 is connected to the first water inlet 31.

[0067] In other words, the intermediate pressure cylinder 42 is connected to the condensing device 6, so that the steam discharged from the intermediate pressure cylinder 42 is condensed into water by the condensing device 6. The condensing device 6 is connected to the first water inlet 31, so that the condensed water enters the steam generating device 3 for recycling, thereby improving the utilization rate of water.

[0068] 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 connected to the condensing device 6 , thereby connecting the intermediate pressure cylinder 42 to the condensing device 6 .

[0069] In some embodiments, as Figure 1 As shown, the solar-coupled steam turbine system 100 according to the embodiment of the present invention further includes a heat recovery system 7 , which includes a third heat exchange device 72 , a first heat recovery pipeline 73 and a second heat recovery pipeline 74 .

[0070] The third heat exchange device 72 includes a second heat absorbing side inlet 721, a second heat absorbing side outlet 722, a second heat releasing side inlet 723, and a second heat releasing side outlet 724. The second heat releasing side inlet 723 is connected to the first heat releasing side outlet 24, and the second heat releasing side outlet 724 is connected to the first medium inlet 11. One end of the first heat regeneration pipeline 73 is connected to the second heat absorbing side inlet 721, and the other end of the first heat regeneration pipeline 73 is connected to the first water outlet. One end of the second heat regeneration pipeline 74 is connected to the second heat absorbing side outlet 722, and the other end of the second heat regeneration pipeline 74 is connected to the first water inlet 31.

[0071] The water discharged from the condensing device 6 enters the third heat exchange device 72 from the first heat return pipe 73, and is heated by the third heat exchange device 72 using the waste heat after the heat exchange between the solar heating device 1 and the first heat exchange device 2, thereby increasing the water temperature of the condensed water, thereby further reducing the heat required to be released when the steam generating device 3 heats the water, and thus further reducing the amount of fuel consumed by the solar energy coupled steam turbine system 100 of the embodiment of the present invention and the emission of pollutants generated by burning the fuel.

[0072] In some embodiments, as Figure 1 As shown, the solar-coupled steam turbine system 100 further includes a sixth pipeline 54, and the heat recovery system includes a first heat recovery device 70 and a second heat recovery device 71. One end of the sixth pipeline 54 is connected to the first water inlet 31, and 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 heat recovery pipeline 73 is connected to the first water outlet 62, and the other end of the second heat recovery pipeline 74 is connected to the first water inlet 31. The first heat recovery device 70 and the second heat recovery device 71 are both used to heat the sixth pipeline 54. The water in, the first heat recovery device 70 and the second heat recovery device 71 are both arranged on the sixth pipeline 54, the first heat recovery device 70 includes a fourth steam inlet 701, the fourth steam inlet 701 is connected to at least one of the high-pressure cylinder 41 and the intermediate-pressure cylinder 42, the first heat recovery device 70 is located between the second water inlet 542 and the second water outlet 541, the second heat recovery device 71 includes a fifth steam inlet 711, the fifth steam inlet 711 is connected to at least one of the high-pressure cylinder 41 and the intermediate-pressure cylinder 42, the second heat recovery device 71 is located between the second water inlet 542 and the first water inlet 31.

[0073] In other words, the steam in at least one of the high-pressure cylinder 41 and the intermediate-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 intermediate-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.

[0074] It can be understood that the heat recovery device 71 utilizes the steam in the high-pressure cylinder 41 and / or the low-pressure cylinder 43 to heat the condensed water in the sixth pipeline 54. When there is insufficient sunlight, that is, when the heat provided by the solar heating device 1 is insufficient, the second heat recovery device 71 assists in heating the condensed water in the sixth pipeline 54, thereby improving the heat utilization rate of the steam.

[0075] In some embodiments, as Figure 1 As shown, the solar-coupled steam turbine system 100 of the embodiment of the present invention further includes a water pump 9 , which is provided on the sixth pipeline 54 . The water pump 9 drives the condensed water in the sixth pipeline 54 to flow, so that the condensed water enters the first water inlet 31 .

[0076] In some embodiments, as Figure 1 As shown, the solar-coupled steam turbine system 100 according to the embodiment of the present invention further includes a deoxygenator 8, which is disposed on the sixth pipeline 54. The deoxygenator 8 can remove oxygen from the condensed water in the sixth pipeline 54, thereby ensuring that the steam formed after the condensed water is heated and evaporated again does not contain oxygen, so that the steam does not corrode the steam turbine 4.

[0077] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0078] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0079] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0080] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0081] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0082] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A solar-coupled steam turbine system, characterized in that: include: 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; a first heat exchange device, the first heat exchange device comprising a first heat absorbing side inlet, a first heat absorbing side outlet, a first heat releasing side inlet, and a first heat releasing side outlet, the first heat releasing side inlet being in communication with the first medium outlet, and the first heat releasing side outlet being in communication 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; A steam turbine, the steam turbine comprising a high-pressure cylinder and an intermediate-pressure cylinder, the high-pressure cylinder comprising a first steam inlet and a second steam outlet, the first steam inlet being connected to the first steam outlet, the second steam outlet being connected to the first heat-absorbing side inlet, The intermediate pressure cylinder includes a second steam inlet, which is connected to the first heat absorption side outlet; The steam generating device comprises: a steam generator, the steam generator having the first water inlet, a third steam outlet, and a fourth steam outlet; a first steam heater, the 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 The second steam heater includes 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.

2. The solar-coupled steam turbine system according to claim 1, characterized in that: Further including: a first pipeline, one end of the first pipeline being connected to the first steam outlet, and the other end of the first pipeline being connected to the first steam inlet; a second pipeline, one end of the second pipeline being connected to the second steam outlet, and the other end of the second pipeline being connected to the first heat absorbing side inlet; A third pipeline, one end of which is connected to the first heat absorption side outlet, and the third pipeline is connected to the second steam inlet.

3. The solar-coupled steam turbine system according to claim 1, wherein: The solar heating device further comprises: a body having a first medium inlet and a first medium outlet; a fourth pipeline, one end of which is connected to the first medium outlet, and the other end of which is connected to the first heat release side inlet; A fifth pipeline, one end of which is connected to the first medium inlet, and the other end of which is connected to the first heat release side outlet.

4. The solar-coupled steam turbine system according to claim 3, characterized in that: 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, A heat storage tank includes a second medium inlet and a second medium outlet, the second heat exchange channel includes a second heat exchange inlet and a second heat exchange outlet, the second medium inlet is connected to the second heat exchange inlet, and the second medium outlet is connected to the second heat exchange outlet.

5. The solar-coupled steam turbine system according to claim 1, wherein: Further including: A condensing device, the condensing device includes a third steam inlet and a first water outlet, the intermediate pressure cylinder has a fifth steam outlet, the third steam inlet is connected to the fifth steam outlet, and the first water outlet is connected to the first water inlet.

6. The solar-coupled steam turbine system according to claim 5, characterized in that: It further includes a heat recovery system, which includes a third heat exchange device, a first heat recovery pipeline and a second heat recovery pipeline. The third heat exchange device includes a second heat absorbing side inlet, a second heat absorbing side outlet, a second heat releasing side inlet and a second heat releasing side outlet, the second heat releasing side inlet is connected to the first heat releasing side outlet, and the second heat releasing side outlet is connected to the first medium inlet. One end of the first heat return pipe is connected to the second heat absorption side inlet, the other end of the first heat return pipe is connected to the first water outlet, one end of the second heat return pipe is connected to the second heat absorption side outlet, and the other end of the second heat return pipe is connected to the first water inlet.

7. The solar-coupled steam turbine system according to claim 6, characterized in that: It further comprises a sixth pipeline, the heat recovery system comprises a first heat recovery device and a second heat recovery device, One end of the sixth pipeline is connected to the first water inlet, and 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 heat recovery pipeline is connected to the first water outlet, and the other end of the second heat recovery pipeline is connected to the first water inlet. The first heat recovery device and the second heat recovery device are both used to heat the 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 includes a fourth steam inlet, the fourth steam inlet is connected to at least one of the high-pressure cylinder and the intermediate-pressure cylinder, and the first heat recovery device is located between the second water inlet and the second water outlet. The second heat recovery device includes a fifth steam inlet, which is connected to at least one of the high-pressure cylinder and the intermediate-pressure cylinder. The second heat recovery device is located between the second water inlet and the first water inlet.

8. The solar-coupled steam turbine system according to claim 7, characterized in that: Further including: A deoxygenation device is provided on the sixth pipeline.

9. A power generation system, characterized in that: include: dynamo; A steam turbine system, wherein the steam turbine system is the solar-coupled steam turbine system according to any one of claims 1 to 8.

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