Light-coal complementary steam turbine system and power generation system

Abstract

An embodiment of the present invention provides a solar-coal-fired complementary steam turbine system and power generation system. The solar-coal-fired complementary steam turbine system includes a solar thermal system, a first heat exchanger, a steam generator, and a steam turbine. The solar thermal system has a first medium inlet and a first medium outlet; the first heat exchanger has 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; the steam generator has a first water inlet and a first steam outlet; the steam turbine includes a high-pressure cylinder and an intermediate-pressure cylinder, the high-pressure cylinder has a high-pressure steam inlet and a high-pressure steam outlet, the high-pressure steam inlet is connected to the first steam outlet, and the high-pressure steam outlet is connected to the first heat absorption side inlet; the intermediate-pressure cylinder has an intermediate-pressure steam inlet and an intermediate-pressure steam outlet, the intermediate-pressure steam inlet is connected to the first heat absorption side outlet. This steam turbine system has the advantages of low cost, low energy consumption, and environmental protection.

Description

Technical Field

[0001] The present invention belongs to the technical field of steam turbine power generation, and in particular relates to a solar-coal complementary steam turbine system and a power generation system. Background Art

[0002] A steam turbine is a rotating steam-powered device and a key component of modern thermal power generation. Steam turbine power generation systems in related technologies utilize the turbine to generate power, which in turn drives an engine to generate electricity. These systems typically use coal as fuel, 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 steam turbine system, which has the advantages of low cost, low energy consumption and environmental protection.

[0005] The solar-coal complementary steam turbine system provided in an embodiment of the present invention includes a solar-thermal system, a first heat exchanger, a steam generating device and a steam turbine.

[0006] The photothermal system has a first medium inlet and a first medium outlet;

[0007] The first heat exchanger has 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;

[0008] The steam generating device has a first water inlet and a first steam outlet;

[0009] The steam turbine comprises a high-pressure cylinder and an intermediate-pressure cylinder, the high-pressure cylinder having a high-pressure steam inlet and a high-pressure steam outlet, the high-pressure steam inlet is connected to the first steam outlet, and the high-pressure steam outlet is connected to the first heat-absorbing side inlet;

[0010] The intermediate-pressure cylinder has an intermediate-pressure steam inlet and an intermediate-pressure steam outlet, and the intermediate-pressure steam inlet is connected to the first heat-absorbing side outlet.

[0011] Compared with the related art, the solar-thermal and coal-fired complementary steam turbine system of the embodiment of the present invention utilizes a solar thermal system instead of a steam generating device to heat the cold reheat steam, thereby greatly reducing the fuel required for the steam generating device. This not only reduces the amount of fuel consumed by the solar-thermal and coal-fired complementary steam turbine system of the embodiment of the present invention and saves costs, but also reduces the emission of pollutants generated by burning fuel.

[0012] Therefore, the solar-coal complementary steam turbine system according to the embodiment of the present invention has the advantages of low cost, low energy consumption and environmental protection.

[0013] In some embodiments, the solar-coal complementary steam turbine system of the embodiment of the present invention further includes a first pipeline and a second pipeline.

[0014] One end of the first pipeline is connected to the first medium outlet, and the other end of the first pipeline is connected to the first heat release side inlet; one end of the second pipeline is connected to the first medium inlet, and the other end of the second pipeline is connected to the first heat release side outlet.

[0015] In some embodiments, the solar-coal hybrid steam turbine system of the embodiment of the present invention further includes an energy storage system, and the energy storage system includes:

[0016] a second heat exchanger, the second heat exchanger having a first heat exchange channel and a second heat exchange channel, the first heat exchange channel having a first heat exchange inlet and a second heat exchange inlet, the second heat exchange channel having a third heat exchange inlet and a fourth heat exchange inlet, the first heat exchange inlet and the first pipe being connected, and the second heat exchange inlet and the second pipe being connected;

[0017] a first medium tank, the first medium having a first medium inlet and outlet, the first medium inlet and outlet being connected to the third heat exchange inlet and outlet;

[0018] The second medium tank has a second medium inlet and outlet, and the second medium inlet and outlet are connected to the fourth heat exchange inlet and outlet.

[0019] In some embodiments, the solar-coal complementary steam turbine system of the present invention further includes a low-pressure cylinder having a low-pressure steam inlet and a low-pressure steam outlet, and the medium-pressure steam outlet is connected to the low-pressure steam inlet.

[0020] In some embodiments, the light-coal complementary steam turbine system of an embodiment of the present invention also includes a condensing device and a deaerator, the condensing device has a first condensing inlet and a first condensing outlet, the deaerator has a first deaeration inlet and a first deaeration outlet, the first condensing inlet is connected to the low-pressure steam outlet, the first condensing outlet is connected to the first deaeration inlet, and the first deaeration outlet is connected to the first water inlet.

[0021] In some embodiments, the solar-coal complementary steam turbine system of the present invention further includes a heat recovery system, which includes a high-pressure heating system and a low-pressure heating system.

[0022] The high pressure heating system comprises a first high pressure heating channel, one end of the first high pressure heating channel is connected to the first deaerator outlet, and the other end of the first high pressure heating channel is connected to the first water inlet;

[0023] The high pressure heating system further comprises a second high pressure heating channel, one end of the second high pressure heating channel is connected to the first deaerator outlet, and the other end of the second high pressure heating channel is connected to at least one of the high pressure cylinder and the intermediate pressure cylinder;

[0024] The low-pressure heating system comprises a first low-pressure heating channel, one end of the first low-pressure heating channel is connected to the first condensation outlet, and the other end of the first low-pressure heating channel is connected to the first deaeration inlet;

[0025] The condensing device further has a second condensing inlet, and the low-pressure heating system further has a second low-pressure heating channel, one end of the second low-pressure heating channel is connected to the second condensing inlet, and the other end of the second low-pressure heating channel is connected to the low-pressure cylinder.

[0026] In some embodiments, the high-pressure heating system includes:

[0027] a first high-pressure heating device, the first high-pressure heating device comprising a first high-pressure heating pipeline, one end of the first high-pressure heating pipeline being connected to the first deaerator outlet;

[0028] a second HCHO device, the second HCHO device comprising a second HCHO pipeline, one end of the second HCHO pipeline being connected to the other end of the first HCHO pipeline;

[0029] a third HCHO device, the third HCHO device comprising a third HCHO pipeline, one end of the third HCHO pipeline being connected to the other end of the second HCHO pipeline, the other end of the third HCHO pipeline being connected to the first water inlet, the chamber of the first HCHO pipeline, the chamber of the second HCHO pipeline, and the chamber of the first HCHO pipeline being sequentially connected to form the first HCHO channel;

[0030] The deaerator also has a second deaeration inlet, and the first high-pressure heater device also has a first high-pressure heater steam inlet and a first high-pressure heater steam outlet, and the first high-pressure heater steam outlet is connected to the second deaeration inlet.

[0031] The second high-pressure steam heater device also has a second high-pressure steam heater inlet and a second high-pressure steam heater outlet, and the second high-pressure steam heater outlet is connected to the first high-pressure steam heater inlet.

[0032] The third high-pressure steam heater device further has a third high-pressure steam inlet and a third high-pressure steam outlet, wherein the third high-pressure steam outlet is connected to the second high-pressure steam inlet, and the third high-pressure steam inlet is connected to one of the high-pressure cylinder and the medium-pressure cylinder.

[0033] The second high-pressure steam heater further comprises a fourth high-pressure steam heater inlet, wherein the fourth high-pressure steam heater inlet is connected to one of the high-pressure cylinder and the intermediate-pressure cylinder;

[0034] The first high-pressure steam heater device further has a fifth high-pressure steam heater inlet, which is connected to one of the high-pressure cylinder and the intermediate-pressure cylinder.

[0035] In some embodiments, the low-pressure boost system comprises:

[0036] a first low-temperature heating device, the first low-temperature heating device comprising a first low-temperature heating pipeline, one end of the first low-temperature heating pipeline being connected to the first condensation outlet;

[0037] a second low-temperature heating device, the second low-temperature heating device comprising a second low-temperature heating pipeline, one end of the second low-temperature heating pipeline being connected to the other end of the first low-temperature heating pipeline;

[0038] a third low-temperature heating device, the third low-temperature heating device comprising a third low-temperature heating pipeline, one end of the third low-temperature heating pipeline being connected to the other end of the second low-temperature heating pipeline;

[0039] a fourth LP heating device, the fourth LP heating device comprising a fourth LP heating pipeline, one end of the fourth LP heating pipeline being connected to the other end of the third LP heating pipeline, the other end of the fourth LP heating pipeline being connected to the first deaerator inlet, the chamber of the first LP heating pipeline, the chamber of the second LP heating pipeline, the chamber of the third LP heating pipeline, and the chamber of the fourth LP heating pipeline being connected in sequence to form the first LP heating channel;

[0040] The first low-temperature heating device further comprises a first low-temperature heating steam inlet and a first low-temperature heating steam outlet, wherein the first low-temperature heating steam outlet is connected to the second condensation inlet.

[0041] The second low-temperature heating device further comprises a second low-temperature heating steam inlet and a second low-temperature heating steam outlet, wherein the second low-temperature heating steam outlet is connected to the first low-temperature heating steam inlet.

[0042] The third low-temperature heating device further comprises a third low-temperature heating steam inlet and a third low-temperature heating steam outlet, wherein the third low-temperature heating steam outlet is connected to the second low-temperature heating steam inlet.

[0043] The fourth low-pressure heating device further comprises a fourth low-pressure heating steam inlet and a fourth low-pressure heating steam outlet, wherein the fourth low-pressure heating steam outlet is connected to the third low-pressure heating steam inlet, and the fourth low-pressure heating steam inlet is connected to the low-pressure cylinder.

[0044] The third low-pressure heating device also has a fifth low-pressure heating steam inlet, and the fifth low-pressure heating steam inlet is connected to the low-pressure cylinder.

[0045] The second low-pressure heating device further has a sixth low-pressure heating steam inlet, which is connected to the low-pressure cylinder.

[0046] The first low-pressure heating device further has a seventh low-pressure heating steam inlet, and the seventh low-pressure heating steam inlet is connected to the low-pressure cylinder.

[0047] In some embodiments, the steam generating device comprises:

[0048] a steam generator, the steam generator having the first water inlet, a third steam outlet, and a fourth steam outlet;

[0049] 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

[0050] 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.

[0051] An embodiment of the present invention further provides a power generation system, which includes a generator and the steam turbine system described in any one of the above embodiments.

[0052] The power generation system of the embodiment of the present invention greatly reduces the amount of fuel required by the steam generation device by providing the light-coal complementary steam turbine system of the above embodiment, thereby saving power generation costs and reducing the emission of pollutants generated by power generation.

[0053] Therefore, the power generation system according to the embodiment of the present invention has the advantages of low cost, low energy consumption and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a structural schematic diagram of a light-coal complementary steam turbine system according to an embodiment of the present invention.

[0055] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle;

[0056] Figure 3 It is a structural schematic diagram of a steam generating device in a light-coal complementary steam turbine system according to an embodiment of the present invention.

[0057] Reference numerals:

[0058] 100. Light-coal complementary steam turbine system; 200. Generator;

[0059] 1. Solar thermal system;

[0060] 101, first medium inlet; 102, first medium outlet; 103, heat storage tank; 104, main body; 1041, mirror field; 1042, tower body;

[0061] 2. First heat exchanger; 201. First heat absorption side inlet; 202. First heat absorption side outlet; 203. First heat release side inlet; 204. First heat release side outlet;

[0062] 3. Steam generating unit; 31. First water inlet; 32. First steam outlet; 33. Steam generator; 331. Economizer; 332. Water wall; 333. Steam-water separator; 334. Horizontal low-temperature superheater; 3341. Third steam outlet; 3342. Fourth steam outlet; 34. First steam heater; 341. Vertical low-temperature superheater; 3411. First heating inlet; 342. Platen superheater; 343. Final superheater; 3431. First heating outlet; 35. Second steam heater; 351. Horizontal low-temperature reheater; 3511. Second heating inlet; 352. Vertical low-temperature reheater; 353. Final reheater; 3531. Second heating outlet;

[0063] 4. Steam turbine; 401, high-pressure cylinder; 4011, high-pressure steam inlet; 4012, high-pressure steam outlet; 402, intermediate-pressure cylinder; 4021, intermediate-pressure steam inlet; 4022, intermediate-pressure steam outlet; 403, low-pressure cylinder; 4031, low-pressure steam inlet; 4032, low-pressure steam outlet;

[0064] 5. First pipeline;

[0065] 6. Second pipeline;

[0066] 7. Energy storage system; 701. Second heat exchanger; 7011. First heat exchange channel; 70111. First heat exchange inlet and outlet; 70112. Second heat exchange inlet and outlet; 7012. Second heat exchange channel; 70121. Third heat exchange inlet and outlet; 70122. Fourth heat exchange inlet and outlet; 702. First medium tank; 7021. First medium inlet and outlet; 703. Second medium tank; 7031. Second medium inlet and outlet;

[0067] 8. Condensation device; 801. First condensation inlet; 802. Second condensation inlet; 803. First condensation outlet;

[0068] 9. Heat recovery system;

[0069] 901, high pressure heating system;

[0070] 9011, first HC channel; 9012, second HC channel;

[0071] 9013, first HCHI device; 90131, first HCHI pipeline; 90132, first HCHI steam inlet; 90133, first HCHI steam outlet; 90134, fifth HCHI steam inlet;

[0072] 9014, second HCHI unit; 90141, second HCHI pipeline; 90142, second HCHI steam inlet; 90143, second HCHI steam outlet; 90144, fourth HCHI steam inlet;

[0073] 9015, third HCHI device; 90151, third HCHI pipeline; 90152, third HCHI steam inlet; 90153, third HCHI steam outlet;

[0074] 902, low-pressure system;

[0075] 9021, first low-pressure heating channel; 9022, second low-pressure heating channel;

[0076] 9023, first low-temperature heating device; 90231, first low-temperature heating pipeline; 90232, first low-temperature heating steam inlet; 90233, first low-temperature heating steam outlet; 90234, seventh low-temperature heating steam inlet;

[0077] 9024, second LP heater; 90241, second LP heater pipeline; 90242, second LP heater steam inlet; 90243, second LP heater steam outlet; 90244, sixth LP heater steam inlet;

[0078] 9025, third low-temperature heater device; 90251, third low-temperature heater pipeline; 90252, third low-temperature heater steam inlet; 90253, third low-temperature heater steam outlet; 90254, fifth low-temperature heater steam inlet;

[0079] 9026, fourth low-temperature heating device; 90261, fourth low-temperature heating pipeline; 90262, fourth low-temperature heating steam inlet; 90263, fourth low-temperature heating steam outlet;

[0080] 903, deaerator; 9031, first deaerator inlet; 9032, second deaerator inlet; 9034, first deaerator outlet. DETAILED DESCRIPTION

[0081] 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.

[0082] Please refer to the following Figure 1-3 The solar-coal hybrid steam turbine system 100 according to an embodiment of the present invention will be described.

[0083] like Figure 1-3 As shown, the solar-coal complementary steam turbine system 100 of the embodiment of the present invention includes a solar-thermal system 1, a first heat exchange gas, a steam generating device 3 and a steam turbine 4.

[0084] The photothermal system 1 is used to convert solar energy into thermal energy. The photothermal system 1 has a first medium inlet 101 and a first medium outlet 102 .

[0085] The first heat exchanger 2 has a first heat absorbing side inlet 201 , a first heat absorbing side outlet 202 , a first heat releasing side inlet 203 and a first heat releasing side outlet 204 . The first heat releasing side inlet 203 is connected to the first medium outlet 102 , and the first heat releasing side outlet 204 is connected to the first medium inlet 101 .

[0086] The steam generating device 3 is used to evaporate liquid water into steam. The steam generating device 3 has a first water inlet 31 and a first steam outlet 32 .

[0087] The steam turbine 4 includes a high-pressure cylinder 401 and an intermediate-pressure cylinder 402 . The high-pressure cylinder 401 has a high-pressure steam inlet 4011 and a high-pressure steam outlet 4012 . The high-pressure steam inlet 4011 is connected to the first steam outlet 32 , and the high-pressure steam outlet 4012 is connected to the first heat-absorbing side inlet 201 .

[0088] The intermediate pressure cylinder 402 has an intermediate pressure steam inlet 4021 and an intermediate pressure steam outlet 4022 . The intermediate pressure steam inlet 4021 is connected to the first heat absorption side outlet 202 .

[0089] Please refer to the following Figure 1-3 The working process of the solar-coal hybrid steam turbine system 100 according to the embodiment of the present invention is described.

[0090] 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 401 of the steam turbine 4 through the high-pressure steam inlet to perform work, and the first steam forms cold reheat steam after performing work in the high-pressure chamber and is discharged from the high-pressure steam outlet 4012; the cold reheat steam discharged from the high-pressure steam outlet 4012 enters the first heat exchanger 2 through the first heat absorption side inlet 201 of the first heat exchanger 2, so that the cold reheat steam exchanges heat with the medium heated by the solar thermal system 1 to increase its temperature to form hot reheat steam, and the hot reheat steam is discharged through the first heat absorption side outlet 202 and enters the intermediate pressure cylinder 402 through the intermediate pressure steam inlet 4021 to perform work. Among them, the medium heated by the solar energy system is discharged from the first medium outlet 102, enters the first heat exchanger 2 through the first heat release side inlet to exchange heat with the cold reheat steam, and the medium after heat exchange is discharged from the first heat release side outlet 204 and enters the solar thermal system 1 through the first medium inlet 101 to be heated again.

[0091] The steam turbine system in the related art includes a boiler and a steam turbine 4, which includes an intermediate-pressure cylinder 402 and a high-pressure cylinder 401. 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 401 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 402. 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 4 system in the related art.

[0092] Compared with the related art, the solar-coal-fired complementary steam turbine system 100 of the embodiment of the present invention utilizes the solar thermal system 1 instead of the steam generating device 3 to heat the cold reheat steam, thereby greatly reducing the fuel required to be consumed by the steam generating device 3. This not only reduces the amount of fuel consumed by the solar-coal-fired complementary steam turbine system 100 of the embodiment of the present invention, thus saving costs, but also reduces the emission of pollutants generated by burning fuel.

[0093] Therefore, the solar-coal hybrid steam turbine system 100 of the embodiment of the present invention can achieve a high degree of complementarity between tower solar thermal and thermal power generation systems, significantly reducing carbon emissions. Taking a conventional 660MW 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, calculations show that the boiler heat consumption can be saved by 862.1 GJ / h. Based on a boiler thermal efficiency of 0.928, this is equivalent to saving 31.84 t / h of standard coal, and an annual coal saving of 278,882.1 tons. Annual carbon dioxide emissions are reduced by 7,306,711.9 tons, sulfur dioxide emissions by 2,370.5 tons, and nitrogen oxide emissions by 2,063.7 tons.

[0094] Therefore, the solar-coal hybrid steam turbine system 100 according to the embodiment of the present invention has the advantages of low cost, low energy consumption and environmental protection.

[0095] Please refer to the following Figure 1-3 The solar-coal complementary steam turbine system 100 according to an embodiment of the present invention will be further described.

[0096] like Figure 1-3 As shown, the solar-coal complementary steam turbine system 100 of the embodiment of the present invention includes a solar-thermal system 1, a first heat exchange gas, a steam generating device 3 and a steam turbine 4.

[0097] The solar thermal system 1 includes a main body 104 and a heat storage tank 103. The main body 104 includes a mirror field 1041 and a tower body 1042. The heat storage tank 103 is located at the upper end of the tower body 1042 and has a first medium inlet 101 and a first medium outlet 102. The mirror field 1041 reflects sunlight onto the heat storage tank 103, which absorbs the sunlight's heat, heating the medium within the tank 103 and raising its temperature, thereby storing solar energy.

[0098] Optionally, the medium in the heat storage tank 103 may be a substance capable of storing energy, such as molten salt or water.

[0099] The first heat exchanger 2 has a first heat absorbing side inlet 201 , a first heat absorbing side outlet 202 , a first heat releasing side inlet 203 and a first heat releasing side outlet 204 . The first heat releasing side inlet 203 is connected to the first medium outlet 102 , and the first heat releasing side outlet 204 is connected to the first medium inlet 101 .

[0100] The steam generating device 3 has a first water inlet 31 and a first steam outlet 32 .

[0101] The steam turbine 4 includes a high-pressure cylinder 401 and an intermediate-pressure cylinder 402. The high-pressure cylinder 401 has a high-pressure steam inlet 4011 and a high-pressure steam outlet 4012. The high-pressure steam inlet 4011 is connected to the first steam outlet 32, and the high-pressure steam outlet 4012 is connected to the first heat-absorbing side inlet 201.

[0102] The intermediate pressure cylinder 402 has an intermediate pressure steam inlet 4021 and an intermediate pressure steam outlet 4022 . The intermediate pressure steam inlet 4021 is connected to the first heat absorption side outlet 202 .

[0103] It is worth noting that, to enable heat exchange within the first heat exchanger 2, the first heat exchanger 2 includes a first heat-absorbing channel and a first heat-releasing channel. One end of the first heat-releasing channel is a first heat-releasing inlet 203, and the other end of the first heat-releasing channel is a first heat-releasing outlet 204. One end of the first heat-absorbing channel is a first heat-absorbing inlet 201 and a first heat-absorbing outlet 202. The first heat-releasing channel and the first heat-absorbing channel are capable of heat exchange within the first heat exchanger 2.

[0104] That is, the medium in the heat storage tank 103 can be discharged from the first medium outlet 102 and then enter the first heat release channel of the first heat exchanger 2 through the first heat release inlet 203. The cold reheat steam discharged from the high-pressure steam outlet 4012 enters the first heat absorption channel of the first heat exchanger 2 through the first heat absorption inlet 201. The medium in the first heat release channel exchanges heat with the cold reheat steam in the first heat absorption channel, heating the cold reheat steam to hot reheat steam, which is then discharged from the first heat absorption outlet 202 and enters the intermediate-pressure cylinder 402 through the intermediate-pressure steam inlet 4021 to perform work. After heat exchange, the medium in the first heat release channel is discharged from the first heat release side outlet 204, enters the heat storage tank 103 through the first medium inlet 101 for energy storage, and is then discharged from the first medium outlet 102 again into the first heat exchanger 2 to repeat the above heat exchange steps, thereby realizing the use of solar energy to heat the cold reheat steam into hot reheat steam. Compared with the method in the related art that requires the cold reheat steam to be passed into the boiler for reheating, the solar-coal complementary steam turbine system 100 of the embodiment of the present invention has the advantages of low cost, low energy consumption and environmental protection.

[0105] In some embodiments, as Figure 1 As shown, the solar-coal complementary steam turbine system 100 according to the embodiment of the present invention further includes a first pipeline 5 and a second pipeline 6 .

[0106] One end of the first pipeline 5 is connected to the first medium outlet 102 , and the other end of the first pipeline 5 is connected to the first heat release side inlet 203 .

[0107] One end of the second pipeline 6 is connected to the first medium inlet 101 , and the other end of the second pipeline 6 is connected to the first heat release side outlet 204 .

[0108] The first pipeline 5 and the second pipeline 6 are provided between the energy storage tank and the first heat exchanger 2 , and connect the energy storage tank with the first heat exchanger 2 , thereby realizing the circulation of the medium between the energy storage tank and the first heat exchanger 2 .

[0109] In some embodiments, the solar-coal hybrid steam turbine system 100 of the embodiment of the present invention further includes an energy storage system 7 , which includes a second heat exchanger 701 , a first medium tank 702 , and a second medium tank 703 .

[0110] The second heat exchanger 701 has a first heat exchange channel 7011 and a second heat exchange channel 7012. The first heat exchange channel 7011 has a first heat exchange inlet and outlet 70111 and a second heat exchange inlet and outlet 70112. The second heat exchange channel 7012 has a third heat exchange inlet and outlet 70121 and a fourth heat exchange inlet and outlet 70122. The first heat exchange inlet and outlet 70111 is connected to the first pipeline 5, and the second heat exchange inlet and outlet 70112 is connected to the second pipeline 6. It is worth noting that the first heat exchange channel 7011 and the second heat exchange channel 7012 are disposed within the second heat exchanger 7011, and heat exchange can be performed between the first heat exchange channel 7011 and the second heat exchange channel 7012. That is, the first heat exchange channel 7011 can transfer heat to the second heat exchange channel 7012, and the second heat exchange channel 7012 can also transfer heat to the first heat exchange channel 7011.

[0111] The first medium tank 702 has a first medium inlet and outlet 7021, which is connected to the third heat exchange inlet and outlet 70121. The second medium tank 703 has a second medium inlet and outlet 7031, which is connected to the fourth heat exchange inlet and outlet 70122. In other words, the medium in the first medium tank 702 can be discharged through the first medium inlet and outlet 7021, then enter the second heat exchange channel 7012 through the third heat exchange inlet and outlet 70121. After heat exchange in the second heat exchange passage, the medium can be discharged through the fourth heat exchange inlet and outlet 70122, then enter the second medium tank 703 through the second medium inlet and outlet 7031. Of course, the medium in the second medium tank 703 can also be discharged through the second medium inlet and outlet 7031, then enter the second heat exchange channel 7012 through the fourth heat exchange inlet and outlet 70122. After heat exchange in the second heat exchange passage, the medium can be discharged through the third heat exchange inlet and outlet 70121, then enter the first medium tank 702 through the first medium inlet and outlet 7021.

[0112] When there is sufficient sunlight, the medium in the heat storage tank 103 that has been heated by solar energy is discharged from the first medium outlet 102, and a part of it enters the first heat release side channel through the first heat release side inlet 203. The medium in the first heat release channel exchanges heat with the cold reheat steam in the first heat absorption channel, so that the cold reheat steam is heated to hot reheat steam and then discharged from the first heat absorption side outlet 202. It then enters the intermediate pressure cylinder 402 through the intermediate pressure steam inlet 4021 to perform work. After heat exchange, the medium in the first heat release channel is discharged from the first heat release side outlet 204 and enters the heat storage tank 103 through the first medium inlet 101. Another portion of the medium enters the first heat exchange channel 7011 of the second heat exchanger 701 through the first heat exchange inlet 70111 of the first heat exchange channel 7011, while the medium in the second medium tank 703 enters the second heat exchange channel 7012 of the second heat exchanger 701 through the fourth heat exchange inlet 70122 and exchanges heat with the medium in the first heat exchange channel 7011. After absorbing heat, the medium in the second heat exchange channel 7012 is discharged through the third heat exchange inlet 70121 and enters the first medium tank 702 through the first medium inlet 7021, thereby realizing heat storage of the energy storage system 7.

[0113] When sunlight is insufficient, the medium in the first medium tank 702 can be discharged through the first medium inlet and outlet 7021 and enter the second heat exchange channel 7012 through the third heat exchange inlet and outlet 70121, where it exchanges heat with the medium in the first heat exchange channel 7011, thereby heating the medium in the first heat exchange channel 7011. The heated medium in the first heat exchange channel 7011 can be discharged through the first heat exchange inlet and outlet 70111 and enter the first heat release side channel through the first heat release side inlet 203, where it exchanges heat with the cold reheat steam in the first heat absorption side channel, heating the cold reheat steam in the second heat absorption side channel to hot reheat steam. This ensures that the temperature of the hot reheat steam entering the intermediate pressure cylinder 402 to perform work is stable, allowing the solar-coal hybrid steam turbine system 100 to operate stably even in conditions of insufficient sunlight.

[0114] In some embodiments, as Figure 3 As shown, the steam generating device 3 includes a steam generator 33 , a first steam heater 34 , and a second steam heater 35 .

[0115] 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.

[0116] Furthermore, if Figure 3 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 .

[0117] 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.

[0118] 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.

[0119] 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.

[0120] In the solar-coal hybrid 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 for heating 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 for heating 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 and second steam heaters 34, 35, is then discharged through the first steam outlet 32.

[0121] The boiler in the related art includes a steam generator 33, a superheater, and a reheater. The steam generator 33 has a first outlet and a second outlet. The superheater has a steam inlet and a main steam outlet. 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 and second outlets and enters the superheater to be heated to form main steam. The main steam is discharged through the main steam outlet for use by the high-pressure cylinder 401 of the steam turbine 4. The cold reheat steam generated after work in the high-pressure cylinder 401 must be returned to the conventional boiler and 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 by the intermediate-pressure cylinder 402.

[0122] The steam generating device 3 of the solar-thermal and coal-fired complementary steam turbine system 100 according to the embodiment of the present invention can be simply modified using a boiler known in the related art. The first outlet of the steam generator 33 of the boiler known 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 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 steam turbine system 100 according to the embodiment of the present invention. There is no need for large-scale modification of the conventional boiler or the costly manufacture of the steam generating device 3. Therefore, the steam generating device 3 of the solar-thermal and coal-fired complementary steam turbine 4 system according to the embodiment of the present invention is easily reusable and has the advantage of low installation costs.

[0123] In some embodiments, as Figure 1As shown, the solar-coal hybrid steam turbine system 100 of the embodiment of the present invention further includes a low-pressure cylinder 403, which has a low-pressure steam inlet 4031 and a low-pressure steam outlet 4032. The intermediate-pressure steam outlet 4022 is connected to the low-pressure steam inlet 4031. That is, the hot reheated steam enters the intermediate-pressure cylinder 402 through the intermediate-pressure steam inlet 4021, performs work, is discharged through the intermediate-pressure steam outlet, and then enters the low-pressure cylinder 403 through the low-pressure steam outlet 4032 to perform work. It can be understood that passing the steam discharged from the intermediate-pressure cylinder 402 into the low-pressure cylinder 403 to perform work again can, on the one hand, improve the energy utilization rate of the steam, allowing the steam generated by the steam generator 3 to perform more work. On the other hand, it further reduces the temperature of the steam discharged from the steam turbine 4, thereby reducing the energy consumption of subsequently condensing the steam into liquid water. Therefore, the photovoltaic and coal-fired complementary steam turbine system 100 of the embodiment of the present invention greatly improves the energy utilization rate of the photovoltaic and coal-fired complementary steam turbine system 100 and reduces the energy consumption of the photovoltaic and coal-fired complementary steam turbine system 100 by providing the low-pressure cylinder 403 .

[0124] In some embodiments, the solar-coal hybrid steam turbine system 100 of the present invention further includes a condenser 8 and a deaerator 903. The condenser 8 has a first condensation inlet 801 and a first condensation outlet 803. The deaerator 903 has a first deaerator inlet 9031 and a first deaerator outlet 9034. The first condensation inlet 801 is connected to the low-pressure steam outlet 4032, the first condensation outlet 803 is connected to the first deaerator inlet 9031, and the first deaerator outlet 9034 is connected to the first water inlet 31. In other words, steam discharged from the low-pressure steam outlet 4032 enters the condenser 8 through the first condensation inlet 801 for condensation. After condensation into liquid water, the steam is discharged from the first condensation outlet 803 and then enters the deaerator through the first deaerator inlet 9031 for deoxygenation. The deoxygenated liquid water is discharged from the first deaerator outlet 9034 and then enters the steam generator 3 through the first water inlet 31 to be reheated to form main steam, and this process repeats in sequence.

[0125] In some embodiments, as Figure 1 As shown, the solar-coal complementary steam turbine system 100 of the embodiment of the present invention further includes a heat recovery system 9 , which includes a high-pressure heating system 901 and a low-pressure heating system 902 .

[0126] The high pressure heating system 901 has a first high pressure heating channel 9011 connected to a second high pressure heating channel 9012 . One end of the first high pressure heating channel 9011 is connected to the first deaerator outlet 9034 , and the other end of the first high pressure heating channel 9011 is connected to the first water inlet 31 .

[0127] The deaerator 903 further has a second deaerator inlet 9032 . One end of the second HP channel 9012 is connected to the second deaerator inlet 9032 . The other end of the second HP channel 9012 is connected to at least one of the high-pressure cylinder 401 and the intermediate-pressure cylinder 402 .

[0128] The LP heating system 902 has a first LP heating channel 9021, one end of which is connected to the first condensation outlet 803, and the other end of which is connected to the first deaerator inlet 9031. The condensing device 8 also has a second condensation inlet 802, and the LP heating system 902 also has a second LP heating channel 9022, one end of which is connected to the second condensation inlet 802, and the other end of which is connected to the low-pressure cylinder 403.

[0129] It is noteworthy that the first LP channel 9011 and the second LP channel 9012 can exchange heat, and the first LP channel 9021 and the second LP channel 9022 can exchange heat. Specifically, steam discharged from the low-pressure cylinder 403 enters the second LP channel 9022 through the other end of the second LP channel 9022. Liquid water in the first LP channel 9021 exchanges heat with the steam in the second LP channel 9022, raising the temperature of the liquid water in the first LP channel 9021. After heat exchange, the steam in the second LP channel 9022 condenses into liquid water, which is then discharged from one end of the second LP channel 9022 and enters the condensing device 8 through the second condensation outlet. After further condensation, the liquid water is discharged from the first condensation outlet 803 and enters the first LP channel 9021 through one end of the first LP channel 9021, exchanging heat with the steam in the second LP channel 9022 to raise its temperature. The heated liquid water is discharged from the other end of the first HC-type heat exchanger channel 9011 and enters the deoxygenation device through the first deoxygenation inlet 9031 for deoxygenation. The deoxygenated liquid water is discharged from the first deoxygenation outlet 9034 and enters the first HC-type heat exchanger channel 9011 through one end of the first HC-type heat exchanger channel 9011. Steam exhausted from the high-pressure cylinder 401 and the intermediate-pressure cylinder 402 enters the second HC-type heat exchanger channel 9012 through the other end of the second HC-type heat exchanger channel 9012. The liquid water in the first HC-type heat exchanger channel 9011 exchanges heat with the steam in the second HC-type heat exchanger channel 9012, thereby raising the temperature of the liquid water in the first HC-type heat exchanger channel 9011. After heat exchange, the steam in the second HC channel 9012 condenses into liquid water and is discharged from one end of the second HC channel 9012. It then enters the deaerator through the second deaerator inlet 9032 for deoxygenation. The deoxygenated liquid water then exits the first deaerator outlet 9034, enters the first HC channel 9011 through one end of the first HC channel 9011, and exchanges heat with the steam in the second HC channel 9012 to raise its temperature. The heated liquid water then exits the other end of the first HC channel 9011 and enters the steam generator 3 through the first water inlet 31, where it is reheated to form main steam.

[0130] It can be understood that the reheat system 9 utilizes the steam in the high-pressure cylinder 401 and the intermediate-pressure cylinder 402 to heat the liquid water in the first high-pressure heater pipeline 90131, and utilizes the steam in the low-pressure cylinder 403 to heat the liquid water in the first high-pressure heater pipeline 90131. This ensures that the temperature of the liquid water entering the steam generating device 3 is not too low, thereby reducing the energy required by the steam generating device 3 to heat the liquid water into main steam. Therefore, the provision of the reheat system 9 in the solar-coal hybrid steam turbine system 100 according to the present embodiment significantly reduces its energy consumption.

[0131] In some embodiments, as Figure 1As shown, the high-pressure heating system 901 includes a first high-pressure heating unit 9013, a second high-pressure heating unit 9014, and a third high-pressure heating unit 9015. The first high-pressure heating unit 9013 has a first high-pressure heating pipeline 90131, one end of which is connected to the first deaerator outlet 9034. The second high-pressure heating unit 9014 has a second high-pressure heating pipeline 90141, one end of which is connected to the other end of the first high-pressure heating pipeline 90131. The third high-pressure heating unit 9015 has a third high-pressure heating pipeline 90151, one end of which is connected to the other end of the second high-pressure heating pipeline 90141, and the other end of the third high-pressure heating pipeline 90151 is connected to the first water inlet 31. The chamber of the first HCHO line 90131 , the chamber of the second HCHO line 90141 , and the chamber of the first HCHO line 90131 are sequentially connected to form a first HCHO channel 9011 .

[0132] The first high-pressure steam heater 9013 also has a first high-pressure steam inlet 90132 and a first high-pressure steam outlet 90133, and the first high-pressure steam outlet 90133 is connected to the second deoxygenation inlet 9032. The second high-pressure steam heater 9014 also has a second high-pressure steam inlet 90142 and a second high-pressure steam outlet 90143, and the second high-pressure steam outlet 90143 is connected to the first high-pressure steam inlet 90132. The third high-pressure steam heater 9015 also has a third high-pressure steam inlet 90152 and a third high-pressure steam outlet 90153, and the third high-pressure steam outlet 90153 is connected to the second high-pressure steam inlet 90142. The third high-pressure steam inlet 90152 is connected to one of the high-pressure cylinder 401 and the medium-pressure cylinder 402.

[0133] The second HP unit 9014 further includes a fourth HP steam inlet 90144, which is connected to one of the high-pressure cylinder 401 and the intermediate-pressure cylinder 402. The first HP unit 9013 further includes a fifth HP steam inlet 90134, which is connected to one of the high-pressure cylinder 401 and the intermediate-pressure cylinder 402.

[0134] Among them, the chamber of the pipeline connecting the first high-pressure steam outlet 90133 and the second deaeration inlet 9032, the chamber of the pipeline connecting the second high-pressure steam outlet 90143 and the first high-pressure steam inlet 90132, and the chamber connecting the third high-pressure steam outlet 90153 and the second high-pressure steam inlet 90142 are connected in sequence to form a second high-pressure channel 9012.

[0135] The HP system 901 utilizes steam from the high-pressure cylinder 401 and the intermediate-pressure cylinder 402 to heat the liquid water in the first HP pipeline 90131, ensuring that the temperature of the liquid water entering the steam generator 3 is not too low. This, in turn, reduces the energy required by the steam generator 3 to heat the liquid water into main steam. Therefore, the provision of the HP system 901 in the solar-to-coal hybrid steam turbine system 100 according to this embodiment of the present invention significantly reduces its energy consumption.

[0136] In some embodiments, as Figure 1 As shown, the LP heating system 902 includes a first LP heating unit 9023, a second LP heating unit 9024, a third LP heating unit 9025, and a fourth LP heating unit 9026. The first LP heating unit 9023 has a first LP heating line 90231, one end of which is connected to the first condensate outlet 803. The second LP heating unit 9024 has a second LP heating line 90241, one end of which is connected to the other end of the first LP heating line 90231. The third LP heating unit 9025 has a third LP heating line 90251, one end of which is connected to the other end of the second LP heating line 90241. The fourth low-temperature heating device 9026 has a fourth low-temperature heating pipeline 90261, one end of the fourth low-temperature heating pipeline 90261 is connected to the other end of the third low-temperature heating pipeline 90251, and the other end of the fourth low-temperature heating pipeline 90261 is connected to the first deoxygenation inlet 9031. The chamber of the first low-temperature heating pipeline 90231, the chamber of the second low-temperature heating pipeline 90241, the chamber of the third low-temperature heating pipeline 90251 and the chamber of the fourth low-temperature heating pipeline 90261 are connected in sequence to form a first low-temperature heating channel 9021.

[0137] The first LC-P unit 9023 also has a first LC-P steam inlet 90232 and a first LC-P steam outlet 90233, with the first LC-P steam outlet 90233 connected to the second condenser inlet 802. The second LC-P unit 9024 also has a second LC-P steam inlet 90242 and a second LC-P steam outlet 90243, with the second LC-P steam outlet 90243 connected to the first LC-P steam inlet 90232. The third LC-P unit 9025 also has a third LC-P steam inlet 90252 and a third LC-P steam outlet 90253, with the third LC-P steam outlet 90253 connected to the second LC-P steam inlet 90242. The fourth LC-P unit 9026 also has a fourth LC-P steam inlet 90262 and a fourth LC-P steam outlet 90263, with the fourth LC-P steam outlet 90263 connected to the third LC-P steam inlet 90252, and the fourth LC-P steam inlet 90262 connected to the low-pressure cylinder 403. The third LC-HJ unit 9025 further includes a fifth LC-HJ steam inlet 90254, which is connected to the low-pressure cylinder 403. The second LC-HJ unit 9024 further includes a sixth LC-HJ steam inlet 90244, which is connected to the low-pressure cylinder 403. The first LC-HJ unit 9023 further includes a seventh LC-HJ steam inlet 90234, which is connected to the low-pressure cylinder 403.

[0138] Among them, the chamber of the pipeline connecting the first low-temperature steam outlet 90233 and the second condensation inlet 802, the chamber of the pipeline connecting the second low-temperature steam outlet 90243 and the first low-temperature steam inlet 90232, the chamber of the pipeline connecting the third low-temperature steam outlet 90253 and the second low-temperature steam inlet 90242, and the chamber of the pipeline connecting the fourth low-temperature steam outlet 90263 and the third low-temperature steam inlet 90252 are connected in sequence to form a second low-temperature channel 9022.

[0139] LP heating system 902 utilizes steam from low-pressure cylinder 403 to heat the liquid water in first LP heating pipeline 90231, ensuring that the temperature of the liquid water entering first LP heating channel 9011 is not too low. Consequently, the temperature of the liquid water entering steam generator 3 is also not too low. This reduces the energy required by steam generator 3 to heat the liquid water into main steam. Therefore, the provision of LP heating system 902 in the solar-to-coal hybrid steam turbine system 100 according to this embodiment of the present invention significantly reduces its energy consumption.

[0140] The present invention also provides a power generation system including a generator 200 and the solar-coal-fired steam turbine system 100 described in the above embodiment. The power generation system provided by the present invention has the advantages of low cost, low energy consumption, and environmental protection by adopting the solar-coal-fired steam turbine system 100.

[0141] 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.

[0142] 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.

[0143] 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.

[0144] 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.

[0145] 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.

[0146] 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-coal complementary steam turbine system, characterized in that: include: A photothermal system having a first medium inlet and a first medium outlet; a first heat exchanger, the first heat exchanger having 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 connected to the first medium outlet, and the first heat releasing side outlet being connected to the first medium inlet; a steam generating device, the steam generating device having a first water inlet and a first steam outlet; a steam turbine comprising a high-pressure cylinder and an intermediate-pressure cylinder, the high-pressure cylinder having a high-pressure steam inlet and a high-pressure steam outlet, the high-pressure steam inlet being connected to the first steam outlet, and the high-pressure steam outlet being connected to the first heat-absorbing side inlet; The intermediate pressure cylinder has an intermediate pressure steam inlet and an intermediate pressure steam outlet, and the intermediate pressure steam inlet 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-coal complementary steam turbine system according to claim 1, characterized in that: Also includes: a first pipeline, one end of the first pipeline being connected to the first medium outlet, and the other end of the first pipeline being connected to the first heat release side inlet; A second pipeline, one end of the second pipeline is connected to the first medium inlet, and the other end of the second pipeline is connected to the first heat release side outlet.

3. The solar-coal complementary steam turbine system according to claim 2, characterized in that: Also included is an energy storage system, the energy storage system comprising: a second heat exchanger, the second heat exchanger having a first heat exchange channel and a second heat exchange channel, the first heat exchange channel having a first heat exchange inlet and a second heat exchange inlet, the second heat exchange channel having a third heat exchange inlet and a fourth heat exchange inlet, the first heat exchange inlet and the first pipe being connected, and the second heat exchange inlet and the second pipe being connected; a first medium tank, the first medium having a first medium inlet and outlet, the first medium inlet and outlet being connected to the third heat exchange inlet and outlet; The second medium tank has a second medium inlet and outlet, and the second medium inlet and outlet are connected to the fourth heat exchange inlet and outlet.

4. The solar-coal complementary steam turbine system according to claim 1, characterized in that: It further includes a low-pressure cylinder having a low-pressure steam inlet and a low-pressure steam outlet, and the medium-pressure steam outlet is connected to the low-pressure steam inlet.

5. The solar-coal complementary steam turbine system according to claim 4, characterized in that: It further includes a condensing device and a deaerator, the condensing device has a first condensing inlet and a first condensing outlet, the deaerator has a first deaeration inlet and a first deaeration outlet, the first condensing inlet is connected to the low-pressure steam outlet, the first condensing outlet is connected to the first deaeration inlet, and the first deaeration outlet is connected to the first water inlet.

6. The solar-coal complementary steam turbine system according to claim 5, characterized in that: It further includes a heat recovery system, which includes a high-pressure heating system and a low-pressure heating system. The high pressure heating system comprises a first high pressure heating channel, one end of the first high pressure heating channel is connected to the first deaerator outlet, and the other end of the first high pressure heating channel is connected to the first water inlet; The high pressure heating system further comprises a second high pressure heating channel, one end of the second high pressure heating channel is connected to the first deaerator outlet, and the other end of the second high pressure heating channel is connected to at least one of the high pressure cylinder and the intermediate pressure cylinder; The low-pressure heating system comprises a first low-pressure heating channel, one end of the first low-pressure heating channel is connected to the first condensation outlet, and the other end of the first low-pressure heating channel is connected to the first deaeration inlet; The condensing device further has a second condensing inlet, and the low-pressure heating system further has a second low-pressure heating channel, one end of the second low-pressure heating channel is connected to the second condensing inlet, and the other end of the second low-pressure heating channel is connected to the low-pressure cylinder.

7. The solar-coal-assisted steam turbine system according to claim 6, characterized in that: The high pressure heating system comprises: a first high-pressure heating device, the first high-pressure heating device comprising a first high-pressure heating pipeline, one end of the first high-pressure heating pipeline being connected to the first deaerator outlet; a second HCHO device, the second HCHO device comprising a second HCHO pipeline, one end of the second HCHO pipeline being connected to the other end of the first HCHO pipeline; a third HCHO device, the third HCHO device comprising a third HCHO pipeline, one end of the third HCHO pipeline being connected to the other end of the second HCHO pipeline, the other end of the third HCHO pipeline being connected to the first water inlet, the chamber of the first HCHO pipeline, the chamber of the second HCHO pipeline, and the chamber of the first HCHO pipeline being sequentially connected to form the first HCHO channel; The deaerator also has a second deaeration inlet, and the first high-pressure heater device also has a first high-pressure heater steam inlet and a first high-pressure heater steam outlet, and the first high-pressure heater steam outlet is connected to the second deaeration inlet. The second high-pressure steam heater device also has a second high-pressure steam heater inlet and a second high-pressure steam heater outlet, and the second high-pressure steam heater outlet is connected to the first high-pressure steam heater inlet. The third high-pressure steam heater device further has a third high-pressure steam inlet and a third high-pressure steam outlet, wherein the third high-pressure steam outlet is connected to the second high-pressure steam inlet, and the third high-pressure steam inlet is connected to one of the high-pressure cylinder and the medium-pressure cylinder. The second high-pressure steam heater further comprises a fourth high-pressure steam heater inlet, wherein the fourth high-pressure steam heater inlet is connected to one of the high-pressure cylinder and the intermediate-pressure cylinder; The first high-pressure steam heater device further has a fifth high-pressure steam heater inlet, which is connected to one of the high-pressure cylinder and the intermediate-pressure cylinder.

8. The solar-coal-assisted steam turbine system according to claim 6, characterized in that: The low-pressure heating system includes: a first low-temperature heating device, the first low-temperature heating device comprising a first low-temperature heating pipeline, one end of the first low-temperature heating pipeline being connected to the first condensation outlet; a second low-temperature heating device, the second low-temperature heating device comprising a second low-temperature heating pipeline, one end of the second low-temperature heating pipeline being connected to the other end of the first low-temperature heating pipeline; a third low-temperature heating device, the third low-temperature heating device comprising a third low-temperature heating pipeline, one end of the third low-temperature heating pipeline being connected to the other end of the second low-temperature heating pipeline; a fourth LP heating device, the fourth LP heating device comprising a fourth LP heating pipeline, one end of the fourth LP heating pipeline being connected to the other end of the third LP heating pipeline, the other end of the fourth LP heating pipeline being connected to the first deaerator inlet, the chamber of the first LP heating pipeline, the chamber of the second LP heating pipeline, the chamber of the third LP heating pipeline, and the chamber of the fourth LP heating pipeline being connected in sequence to form the first LP heating channel; The first low-temperature heating device further comprises a first low-temperature heating steam inlet and a first low-temperature heating steam outlet, wherein the first low-temperature heating steam outlet is connected to the second condensation inlet. The second low-temperature heating device further comprises a second low-temperature heating steam inlet and a second low-temperature heating steam outlet, wherein the second low-temperature heating steam outlet is connected to the first low-temperature heating steam inlet. The third low-temperature heating device further comprises a third low-temperature heating steam inlet and a third low-temperature heating steam outlet, wherein the third low-temperature heating steam outlet is connected to the second low-temperature heating steam inlet. The fourth low-pressure heating device further comprises a fourth low-pressure heating steam inlet and a fourth low-pressure heating steam outlet, wherein the fourth low-pressure heating steam outlet is connected to the third low-pressure heating steam inlet, and the fourth low-pressure heating steam inlet is connected to the low-pressure cylinder. The third low-pressure heating device also has a fifth low-pressure heating steam inlet, and the fifth low-pressure heating steam inlet is connected to the low-pressure cylinder. The second low-pressure heating device further has a sixth low-pressure heating steam inlet, which is connected to the low-pressure cylinder. The first low-pressure heating device further has a seventh low-pressure heating steam inlet, and the seventh low-pressure heating steam inlet is connected to the low-pressure cylinder.

9. A power generation system, characterized in that: include: dynamo, The steam turbine system is a light-coal complementary steam turbine system according to any one of claims 1 to 8.

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