Direct-fired light coal complementary steam turbine system and power generation system

Abstract

The application provides a direct light-coal complementary steam turbine system and a power generation system, and the direct light-coal complementary steam turbine system comprises a solar heating device, a first heat exchange device, a steam turbine, an air heat exchange device and a steam generating device, 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 comprises a high-pressure cylinder and a medium-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, and the second steam outlet is communicated with the first heat absorption side inlet. The direct light-coal complementary steam turbine system has the advantages of low use cost, low energy consumption and environmental protection.

Description

Technical Field

[0001] This invention relates to the field of steam turbine power generation technology, specifically to a direct solar-coal complementary steam turbine system and power generation system. Background Technology

[0002] A steam turbine is a rotary steam power plant and one of the main pieces of equipment in modern thermal power generation. Steam turbine power generation systems in related technologies utilize the work done by the steam turbine to drive an engine to generate electricity. However, these systems consume a large amount of coal, resulting in higher pollutant emissions and higher power generation costs. Summary of the Invention

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

[0004] Therefore, this invention proposes a direct solar-coal complementary turbine system, which has the advantages of low operating cost, low energy consumption, and environmental friendliness.

[0005] This invention also provides a power generation system, which includes the direct solar-coal complementary steam turbine system described in the above embodiments.

[0006] The direct solar-coal complementary steam turbine system of this 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 including 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; a steam generator for evaporating water into steam, the steam generator including a first water inlet and a first steam outlet; a steam turbine including a high-pressure cylinder, an intermediate-pressure cylinder and a low-pressure cylinder, the high-pressure cylinder including a first steam inlet and a second steam outlet, the first steam inlet communicating with the first steam outlet, the second steam outlet communicating with the first heat-absorbing side inlet, the intermediate-pressure cylinder including a second steam inlet communicating with the first heat-absorbing side outlet, the intermediate-pressure cylinder and the low-pressure cylinder communicating so that steam from the intermediate-pressure cylinder can be discharged into the low-pressure cylinder; and an air heat exchange device including a second medium inlet, a second medium outlet, an air inlet and an air outlet, the second medium inlet communicating with the first heat-releasing side outlet, and the second medium outlet communicating with the first medium inlet.

[0007] The direct solar-coal complementary steam turbine system of this invention uses a solar heating device to replace the steam generator to heat the cold reheat steam, thereby reducing the amount of fuel heat required by the steam generator. Therefore, it not only reduces the amount of fuel consumed by the direct solar-coal complementary steam turbine system of this invention, saving costs, but also reduces the emissions of pollutants generated by burning fuel.

[0008] Therefore, the direct solar-coal complementary steam turbine system of this invention has the advantages of low operating cost, low energy consumption, and environmental friendliness.

[0009] In some embodiments, the steam generating device includes: a steam generator having a first water inlet, a third steam outlet, and a fourth steam outlet; a first steam heater having 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 having 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 direct solar-coal complementary turbine system further includes: a first pipeline, one end of which is connected to the first steam outlet and the other end of which is connected to the first steam inlet; a second pipeline, one end of which is connected to the second steam outlet and the other end of which is connected to the first heat-absorbing side inlet; and a third pipeline, one end of which is connected to the first heat-absorbing side outlet and the third pipeline is connected to the second steam inlet.

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

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

[0013] In some embodiments, the direct solar-coal complementary 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 direct solar-coal complementary turbine system further includes a regenerative system, which includes a third heat exchanger, a first regenerative pipeline, and a second regenerative pipeline. The third heat exchanger 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 regenerative pipeline is connected to the second heat-absorbing side inlet, and the other end of the first regenerative pipeline is connected to the first water outlet. One end of the second regenerative pipeline is connected to the second heat-absorbing side outlet, and the other end of the second regenerative pipeline is connected to the first water inlet.

[0015] In some embodiments, the direct photovoltaic-coal complementary 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 inlet, and the other end of the sixth pipeline is connected to the first outlet. The sixth pipeline includes a second inlet and a second outlet. The other end of the first regenerative pipeline is connected to the first outlet, and the other end of the second regenerative pipeline is connected to the first inlet. Both the first and second regenerative devices are used to heat the water in the sixth pipeline. Both the first and second regenerative devices are located on the sixth pipeline. The first regenerative device includes a fourth steam inlet, which is connected to at least one of the high-pressure cylinder and the intermediate-pressure cylinder. The first regenerative device is located between the second inlet and the second outlet. The second regenerative 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 regenerative device is located between the second inlet and the first inlet.

[0016] In some embodiments, the direct photovoltaic-coal complementary turbine system further includes a deaerator, which is located on the sixth pipeline.

[0017] The direct solar-coal complementary steam turbine power generation system of this invention includes: a generator; and a steam turbine system, wherein the steam turbine system is the direct solar-coal complementary steam turbine system described in any of the above embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a direct solar-coal complementary steam turbine system according to an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the steam generator according to an embodiment of the present invention.

[0020] Figure label:

[0021] 100 direct solar-coal complementary steam turbine system;

[0022] Solar heating device 1; first medium inlet 11; first medium outlet 12; main 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; first medium storage tank 162; first port 1621; second medium storage tank 163; second port 1631;

[0023] First heat exchange device 2; First heat absorption side inlet 21; First heat absorption side outlet 22; First heat release side inlet 23; First heat release side outlet 24;

[0024] Steam generator 3; First water inlet 31; First steam outlet 32; Steam generator 33; Economizer 331; Water-cooled 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; Screen-type superheater 342; Final stage 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 stage 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 pipe 51; Second pipe 52; Third pipe 53; Sixth pipe 54; Second outlet 541; Second inlet 542;

[0027] Condensation unit 6; Third steam inlet 61; First water outlet 62;

[0028] 7. Regenerative system; 70. First regenerative device; 701. Fourth steam inlet; 71. Second regenerative device; 711. Fifth steam inlet; 72. Third heat exchanger; 721. Second heat absorption side inlet; 722. Second heat absorption side outlet; 723. Second heat release side inlet; 724. First regenerative pipeline; 73. Second regenerative pipeline; 74. Deaerator; 8. Water pump;

[0029] Air heat exchanger 10; Second medium inlet 101; Second medium outlet 102; Air inlet 103; Air outlet 104;

[0030] Generator 200. Detailed Implementation

[0031] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0032] The direct solar-coal complementary steam turbine system 100 of the present invention is described below with reference to the accompanying drawings.

[0033] like Figures 1-2As shown, the direct solar-coal complementary steam turbine system 100 of this embodiment includes a solar heating device 1, a first heat exchange device 2, an air heat exchange device 10, a steam generator 3, and a steam turbine 4.

[0034] A solar heating device 1 is used to convert solar energy into thermal energy. The solar heating device 1 includes a first medium inlet 11 and a first medium outlet 12. A first heat exchange device 2 includes a first heat-absorbing side inlet 21, a first heat-absorbing side outlet 22, a first heat-releasing side inlet 23, and a first heat-releasing side outlet 24. The first heat-releasing side inlet 23 is connected to the first medium outlet 12, and the first heat-releasing side outlet 24 is connected to the first medium inlet 11. A steam generating device 3 is used to heat water into steam. The steam generating device 3 includes a first water inlet 31 and a first steam outlet 32.

[0035] The steam turbine 4 includes a high-pressure cylinder 41, an intermediate-pressure cylinder 42, and a low-pressure cylinder 43. 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-absorbing side inlet 21. The intermediate-pressure cylinder 42 includes a second steam inlet 421, which is connected to the first heat-absorbing side outlet 22. The intermediate-pressure cylinder 42 and the low-pressure cylinder 43 are connected so that steam from the intermediate-pressure cylinder 42 can be discharged into the low-pressure cylinder 43.

[0036] The air heat exchanger 10 includes a second medium inlet 101, a second medium outlet 102, an air inlet 103, and an air outlet 104. The second medium inlet 101 is connected to the first heat release side outlet 24, and the second medium outlet 102 is connected to the first medium inlet 12.

[0037] The operation of the direct solar-coal complementary steam turbine system 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0038] like Figure 1As shown, water enters the steam generator 3 through the first inlet 31 and is processed to form high-temperature and high-pressure main steam. The main steam is discharged from the steam generator 3 through the first steam outlet 32. The main steam enters the high-pressure cylinder 41 of the turbine 4 through the first steam inlet 411 to do work. The steam that does 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 exchanger 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 raising the temperature of the cold reheat steam to form hot reheat steam. 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 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 for reheating; 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 do work.

[0039] Outside air enters the air heat exchanger 10 through air inlet 103. After being heated by the solar heating device 1, it enters the air heat exchanger 10 through the second medium inlet 101, so that the heat medium exchanges heat with the air and thus heats the air. The heated air is discharged from the air outlet 104. The heated air can be used for purposes such as drying fuel.

[0040] The steam turbine system in the related technology includes a boiler and a steam turbine, which comprises an intermediate-pressure cylinder and a high-pressure cylinder. During operation, water enters the boiler and is heated to form high-temperature, high-pressure main steam. This main steam then enters the high-pressure cylinder to perform work, forming cold reheat steam. This cold reheat steam needs to be reheated in the boiler to form hot reheat steam, which is then used to power the intermediate-pressure cylinder. In other words, the boiler not only needs to heat the water to form high-temperature, high-pressure main steam but also needs to reheat the cold reheat steam. Therefore, the boiler consumes a significant amount of fuel to heat both the cold reheat steam and the water, resulting in higher pollutant emissions and higher operating costs for the steam turbine system in the related technology.

[0041] Compared with related technologies, the direct solar-coal complementary steam turbine system 100 of the present invention uses a solar heating device 1 instead of a steam generator 3 to heat cold reheat steam, thereby reducing the amount of fuel heat required by the steam generator 3. Therefore, it not only reduces the amount of fuel consumed by the direct solar-coal complementary steam turbine system 100 of the present invention and saves costs, but also reduces the emissions of pollutants generated by burning fuel.

[0042] Using the solar-coal complementary steam turbine system 100 of this invention, taking a conventional 660MW steam turbine unit (CLN600-24.2 / 566 / 566, single intermediate reheat, reheat steam flow rate of 1422.38t / h under THA conditions as an example, it can save 862.1GJ / h of boiler heat consumption. Calculated based on a boiler thermal efficiency of 0.923, this is equivalent to saving 31.87t / h of standard coal, resulting in an annual coal saving of 279,184.3 tons, an annual reduction of 7,314,628.2 tons of carbon dioxide emissions, an annual reduction of 2,373.1 tons of sulfur dioxide emissions, and an annual reduction of 2,066.0 tons of nitrogen oxide emissions.

[0043] Therefore, the direct solar-coal complementary steam turbine system 100 of this invention has the advantages of low operating cost, low energy consumption and environmental friendliness.

[0044] like Figure 1 As shown, the power generation system of this embodiment includes the direct solar-coal complementary steam turbine system 100 and generator 200 of the above embodiment.

[0045] The direct solar-coal complementary turbine system 100 includes a solar heating device 1, a first heat exchange device 2, a steam generating device 3, a turbine 4, a condensing device 6, a deaerator 8, a regenerative system 7, and a water pump 9.

[0046] The solar heating device 1 includes a solar tower, a mirror field, an energy storage device 16, and a second heat exchange device 161. The mirror field works in conjunction with the solar tower so that the light energy reflected by the mirror field is received by the solar tower and used to heat the medium inside the solar tower. The solar tower has a first medium inlet 11 and a first medium outlet 12. The medium enters the solar tower through the first medium inlet 11, is heated by the solar tower, and is discharged through the first medium outlet 12.

[0047] The first medium inlet 11 is connected to the first heat-exchange side outlet 24, and the first medium outlet 12 is connected to the first heat-exchange 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.

[0048] The solar heating device 1 further includes a main body 13, a fourth pipe 14, and a fifth pipe 15. The main body 13 has a first medium inlet 11 and a first medium outlet 12. One end of the fourth pipe 14 is connected to the first medium outlet 12, and the other end of the fourth pipe 14 is connected to the first heat release side inlet 23. One end of the fifth pipe 15 is connected to the first medium inlet 11, and the other end of the fifth pipe 15 is connected to the first heat release side outlet 24. The main body 13 is connected to the first heat release side inlet 23 through the fourth pipe 14 so that the heated medium enters the first heat exchange device 2. The main body 13 is connected to the first heat release side outlet 24 through the fifth pipe 15 so that the heat-exchanged medium returns to the main body 13 for heating.

[0049] The energy storage device 16 includes a second heat exchange device 161, a first medium storage tank 162, and a second medium storage tank 163. 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 a fourth pipeline 14, and the first heat exchange outlet 1612 is connected to a fifth pipeline 15. The first medium storage tank 162 includes a first port 1621, and the second medium storage tank 163 includes a second port 1631. The second heat exchange channel includes a second heat exchange inlet 1613 and a second heat exchange outlet 1614. The first port 1621 is connected to the second heat exchange inlet 1613, and the second heat exchange outlet 1614 is connected to the second port 1631.

[0050] Under sufficient sunlight, the medium heated by the main body 13 is discharged through the first medium outlet 12. 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 second medium storage tank 163 is discharged from the second port 1631 and enters the second heat exchange channel through the second heat exchange outlet 1614, so that the medium discharged from the heat storage tank 162 exchanges heat with the medium in the first heat exchange channel. The hot medium in the second heat exchange channel after heat exchange returns to the first medium storage tank 162 through the first port 1621, thereby storing a part of the heat energy in the first medium storage tank 162.

[0051] When sunlight is insufficient, the hot medium in the first medium storage tank 162 is discharged through the first port 1621 and 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 stability of the hot reheat steam and enabling the turbine 4 to operate stably. After heat exchange, the medium in the first heat exchange channel enters the second medium storage tank 163 through the second port 1631.

[0052] 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 drives the generator 200 to generate electricity. The first heat-dissipating side inlet 23 of the first heat exchange device 2 is connected to the first medium outlet 12, and the first heat-dissipating side outlet 24 is connected to the first medium inlet 11.

[0053] 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. A condensing device 6, a deaerator 8, a water pump 9, and a regenerative system 7 are connected between the sixth steam outlet 432 and the first water inlet 31.

[0054] The power generation system of this invention has the advantages of low operating cost, low energy consumption, and environmental friendliness.

[0055] In some embodiments, such as Figure 2 As shown, the steam generating device 3 includes a steam generator 33, a first steam heater 34, and a second steam heater 35.

[0056] 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.

[0057] In the direct solar-coal complementary steam turbine system 100 of this embodiment, water enters the steam generator 33 through the first inlet 31 and is heated to form steam. A portion of the steam exits from the third steam outlet 3341, passes through the first heating inlet 3411, and enters the first steam heater 34 for further heating to form high-temperature, high-pressure main steam (24.2 MPa, 566°C). This main steam is then discharged through the first heating outlet 3431. Another portion of the steam exits from the third steam outlet 3341, passes through the second heating inlet 3511, and enters the second steam heater 35 for further heating to form high-temperature, high-pressure main steam. This main steam is then discharged through the second heating outlet 3531. The main steam formed after being heated by the first steam heater 34 and the second steam heater 35 is then discharged through the first steam outlet 32.

[0058] The boiler in the related technology 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. Both the first and second outlets are connected to the steam inlet. Steam exits from the first and second outlets and enters the superheater to be heated and formed main steam. The main steam is then discharged through the main steam outlet for use by the high-pressure cylinder of the steam turbine. The cold reheat steam generated after work is performed in the high-pressure cylinder needs to return to the conventional boiler and enter the reheater through the cold reheat steam inlet to be heated and formed hot reheat steam. The hot reheat steam is then discharged through the hot reheat steam outlet for use by the intermediate-pressure cylinder.

[0059] The steam generating device 3 of the solar thermal and coal-fired complementary steam turbine system 100 of this embodiment can be easily modified from 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 superheater heat the steam generated by the steam generating device 3 together. Therefore, only a portion of the piping in the conventional boiler needs to be modified to adapt the conventional boiler to the direct solar thermal and coal-fired complementary steam turbine system 100 of this embodiment, without the need for large-scale modification of the conventional boiler or the cost of manufacturing the steam generating device 3. Therefore, the steam generating device 3 of the solar thermal and coal-fired complementary steam turbine system 100 of this embodiment is easy to reuse and has the advantage of low layout cost.

[0060] like Figure 2 As shown, the steam generating device 3 of this embodiment includes a steam generator 33, a first steam heater 34, and a second steam heater 35.

[0061] 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 connected in sequence. The economizer 331 and water-cooled wall 332 are used to heat water to generate steam. The steam-water separator 333 is used to separate unevaporated water from the steam. The separated water is returned to the water-cooled wall 332 for reheating and evaporation. The horizontal low-temperature superheater 334 includes a third steam outlet 3341 and a fourth steam outlet 3342.

[0062] The first steam heater 34 includes a vertical low-temperature superheater 341, a screen-type superheater 342, and a final-stage superheater 343. The vertical low-temperature superheater 341 includes a first heating inlet 3411, and the final-stage superheater 343 has a first heating outlet 3431. The first heating inlet 3411 is connected to a third steam outlet 3341. The vertical low-temperature superheater 341, the screen-type superheater 342, and the final-stage superheater 343 are sequentially connected, thereby heating the steam to form high-temperature, high-pressure main steam.

[0063] 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 a fourth steam outlet 3342. The horizontal low-temperature reheater 351, the vertical low-temperature reheater 352, and the final stage reheater 353 are sequentially connected, thereby heating the steam to form high-temperature, high-pressure main steam.

[0064] In some embodiments, such as Figure 1 As shown, the direct solar-coal complementary turbine system 100 of this embodiment of the invention further includes a first pipeline 51, a second pipeline 52 and a third pipeline 53.

[0065] 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 absorption side inlet 21; one end of the third pipe 53 is connected to the first heat absorption side outlet 22, and the third pipe 53 is connected to the second steam inlet 421.

[0066] In other words, the high-pressure cylinder 41 is connected to the steam generator 3 via the first pipe 51, so that the main steam generated by the steam generator 3 enters the high-pressure cylinder 41. The high-pressure cylinder 41 is connected to the first heat exchanger 2 via the second pipe 52, so that the first heat exchanger 2 heats the cold reheat steam discharged from the high-pressure cylinder 41, thereby forming hot reheat steam. The intermediate-pressure cylinder 42 is connected to the first heat exchanger 2 via the third pipe 53, so that hot reheat steam enters the intermediate-pressure cylinder 42.

[0067] In some embodiments, such as Figure 1 As shown, the direct photovoltaic-coal complementary turbine system 100 of this embodiment further includes a condensing device 6.

[0068] 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.

[0069] 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 can enter the steam generator 3 for recycling, thus improving the water utilization rate.

[0070] 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.

[0071] In some embodiments, such as Figure 1 As shown, the direct solar-coal complementary turbine system 100 of this embodiment further includes a regenerative system 7, which includes a third heat exchange device 72, a first regenerative pipeline 73, and a second regenerative pipeline 74.

[0072] The third heat exchanger 72 includes 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. The second heat release side inlet 723 is connected to the first heat release side outlet 24, and the second heat release side outlet 724 is connected to the first medium inlet 11. One end of the first regenerative pipeline 73 is connected to the second heat absorption side inlet 721, and the other end of the first regenerative pipeline 73 is connected to the first water outlet. One end of the second regenerative pipeline 74 is connected to the second heat absorption side outlet 722, and the other end of the second regenerative pipeline 74 is connected to the first water inlet 31.

[0073] The water discharged from the condenser 6 enters the third heat exchanger 72 through the first regenerative pipe 73. The third heat exchanger 72 uses the residual heat after the solar heating device 1 and the first heat exchanger 2 to heat the water, thereby increasing the temperature of the condensate. This further reduces the heat released by the steam generator 3 when heating the water, thus further reducing the amount of fuel consumed and the amount of pollutants emitted from fuel combustion in the direct solar-coal complementary turbine system 100 of this embodiment of the invention.

[0074] In some embodiments, such as Figure 1 As shown, the direct solar-coal complementary turbine system 100 further includes a sixth pipeline 54, and 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 inlet 31, and the other end of the sixth pipeline 54 is connected to the first outlet 62. The sixth pipeline 54 includes a second inlet 542 and a second outlet 541. The other end of the first regenerative pipeline 73 is connected to the first outlet 62, and the other end of the second regenerative pipeline 74 is connected to the first inlet 31. Both the first regenerative device 70 and the second regenerative device 71 are used to heat the sixth pipeline. The water in pipe 54, the first regeneration device 70 and the second regeneration device 71 are both installed on the sixth pipe 54. The first regeneration device 70 includes a fourth steam inlet 701, which is connected to at least one of the high-pressure cylinder 41 and the intermediate-pressure cylinder 42. The first regeneration device 70 is located between the second water inlet 542 and the second water outlet 541. The second regeneration device 71 includes a fifth steam inlet 711, which is connected to at least one of the high-pressure cylinder 41 and the intermediate-pressure cylinder 42. The second regeneration device 71 is located between the second water inlet 542 and the first water inlet 31.

[0075] In other words, steam from at least one of the high-pressure cylinder 41 and the intermediate-pressure cylinder 42 enters the first regenerative device 70 through the fourth steam inlet 701, and steam from at least one of the high-pressure cylinder 41 and the intermediate-pressure cylinder 42 enters the first regenerative device 71 through the fifth steam inlet 711, allowing the steam to exchange heat with the condensate in the sixth pipeline 54, thereby heating the condensate. The steam after heat exchange condenses to form condensate, which is discharged from the first drain outlet and enters the sixth pipeline 54.

[0076] Understandably, the regenerative device 71 uses the steam in the high-pressure cylinder 41 and / or the low-pressure cylinder 43 to heat the condensate in the sixth pipe 54. Under conditions of insufficient sunlight, i.e. when the heat provided by the solar heating device 1 is insufficient, the second regenerative device 71 assists in heating the condensate in the sixth pipe 54, thereby improving the heat utilization rate of the steam.

[0077] In some embodiments, such as Figure 1As shown, the direct solar-coal complementary turbine system 100 of this embodiment further includes a water pump 9, which is installed on the sixth pipeline 54. The water pump 9 drives the flow of condensate in the sixth pipeline 54, allowing the condensate to enter the first inlet 31.

[0078] In some embodiments, such as Figure 1 As shown, the direct solar-coal complementary turbine system 100 of this embodiment further includes a deaerator 8, which is installed on the sixth pipeline 54. The deaerator 8 removes oxygen from the condensate in the sixth pipeline 54, ensuring that the steam formed after the condensate is reheated and evaporated is oxygen-free, thus preventing the steam from corroding the turbine 4.

[0079] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0080] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0081] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0082] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0083] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0084] 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. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A direct light coal complementary steam turbine system, characterized by, 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; a first heat exchange device, the first heat exchange device comprising 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; a steam generation device for evaporating water into steam, the steam generation device comprising a first water inlet and a first steam outlet; a steam turbine, the steam turbine comprising a high pressure cylinder, a medium pressure cylinder, and a low pressure cylinder, the high pressure cylinder comprising a first steam inlet and a second steam outlet, the first steam inlet being in communication with the first steam outlet, the second steam outlet being in communication with the first heat absorption side inlet, the medium pressure cylinder comprising a second steam inlet, the second steam inlet being in communication with the first heat absorption side outlet, the medium pressure cylinder and the low pressure cylinder being in communication such that steam from the medium pressure cylinder can be discharged into the low pressure cylinder; an air heat exchange device, the air heat exchange device comprising a second medium inlet, a second medium outlet, an air inlet, and an air outlet, the second medium inlet being in communication with the first heat release side outlet, the second medium outlet being in communication with the first medium inlet; the steam generation device comprising: 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 a second steam heater, the second steam heater comprising a second heating inlet and a second heating outlet, the second heating inlet being in communication with the fourth steam outlet, the second heating outlet being in communication with the first steam outlet.

2. The direct light coal complementary steam turbine system of claim 1, wherein, Further comprising: a first pipe, one end of the first pipe being connected to the first steam outlet, the other end of the first pipe being connected to the first steam inlet; a second pipe, one end of the second pipe being connected to the second steam outlet, the other end of the second pipe being connected to the first heat absorption side inlet; a third pipe, one end of the third pipe being connected to the first heat absorption side outlet, the other end of the third pipe being connected to the second steam inlet.

3. The direct light coal complementary steam turbine system of claim 1, wherein, The solar heating device further comprising: a body, the body having the first medium inlet and the first medium outlet; a fourth pipe, one end of the fourth pipe being connected to the first medium outlet, the other end of the fourth pipe being connected to the first heat release side inlet; a fifth pipe, one end of the fifth pipe being connected to the first medium inlet, the other end of the fifth pipe being connected to the first heat release side outlet.

4. The direct light coal complementary steam turbine system of claim 3, wherein, The solar heating device further comprising 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 pipe, the first heat exchange outlet being in communication with the fifth pipe, The energy storage device comprises a first medium storage tank and a second medium storage tank, the first medium storage tank comprises a first port, the second medium storage tank comprises a second port, the second heat exchange channel comprises a second heat exchange inlet and a second heat exchange outlet, the first port is in communication with the second heat exchange inlet, and the second heat exchange outlet is in communication with the second port.

5. The direct light coal complementary steam turbine system of claim 1, wherein, Further comprising: A condensing device, the condensing device comprises a third steam inlet and a first water outlet, the intermediate pressure cylinder has a fifth steam outlet, the third steam inlet is in communication with the fifth steam outlet, and the first water outlet is in communication with the first water inlet.

6. The direct light coal complementary steam turbine system of claim 5, wherein, Further comprising a regenerative system, the regenerative system comprises a third heat exchange device, a first regenerative pipeline and a second regenerative pipeline, 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 in communication with the first heat release side outlet, and the second heat release side outlet is connected with the first medium inlet, One end of the first regenerative pipeline is connected with the second heat absorption side inlet, the other end of the first regenerative pipeline is in communication with the first water outlet, one end of the second regenerative pipeline is connected with the second heat absorption side outlet, and the other end of the second regenerative pipeline is in communication with the first water inlet.

7. The direct light coal complementary steam turbine system of claim 6, wherein, Further comprising a sixth pipeline, the regenerative system comprises a first regenerative device and a second regenerative device, 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 regenerative pipeline is in communication with the first water outlet, and the other end of the second regenerative pipeline is in communication with the first water inlet, The first regenerative device and the second regenerative device are both used for heating water in the sixth pipeline, and the first regenerative device and the second regenerative device are both arranged on the sixth pipeline, The first regenerative device comprises a fourth steam inlet, the fourth steam inlet is in communication with at least one of the high pressure cylinder and the intermediate pressure cylinder, and the first regenerative device is located between the second water inlet and the second water outlet, The second regenerative device comprises a fifth steam inlet, the fifth steam inlet is in communication with at least one of the high pressure cylinder and the intermediate pressure cylinder, and the second regenerative device is located between the second water inlet and the first water inlet.

8. The direct light coal complementary steam turbine system of claim 7, wherein, Further comprising: A deoxidizing device, the deoxidizing device is arranged on the sixth pipeline.

9. A power generation system characterized by comprising: Including: A generator; A steam turbine system, the steam turbine system is the direct light coal complementary steam turbine system of any one of claims 1-8.

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