Indirectly light and heat and coal complementary steam turbine system and power generation system

Abstract

The application provides an indirect light-heat and coal-complementary steam turbine system and power generation system, which comprises a solar heating device, a first heat exchange device, a steam turbine 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, a medium-pressure cylinder and a low-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 indirect light-heat and coal-complementary steam turbine system has the advantages of low use cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steam turbine power generation, in particular to an indirect light-heat and coal-complementary steam turbine system and a power generation system. BACKGROUND

[0002] The steam turbine is a kind of rotary steam power device, and the steam turbine is one of the main equipment of modern thermal power generation. The steam turbine power generation system in the related art utilizes the steam turbine to do work and then drives the engine to generate power. However, the steam turbine power generation system in the related art has a large amount of coal consumption, which leads to a large amount of pollutant emission and high cost of power generation. SUMMARY

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

[0004] To this end, the present application provides an indirect light-heat and coal-complementary steam turbine system, which has the advantages of low use cost, low energy consumption and environmental protection.

[0005] The present application also provides a power generation system, which comprises the indirect light-heat and coal-complementary steam turbine system of the above-mentioned embodiments.

[0006] The indirect light-heat and coal-complementary steam turbine system of the present application comprises: a solar heating device for converting solar energy into heat 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, the first heat release side inlet being in communication with the first medium outlet, and the first heat release side outlet being in communication with the first medium inlet; 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, and 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, and the medium-pressure cylinder and the low-pressure cylinder being in communication to allow the steam of the medium-pressure cylinder to be discharged into the low-pressure cylinder.

[0007] The indirect solar-thermal and coal-complementary steam turbine system of the embodiment of the present application uses a solar heating device to replace a steam generating device to heat cold reheat steam, so that the heat of fuel consumed by the steam generating device is reduced, thus not only reducing the amount of fuel consumed by the indirect solar-thermal and coal-complementary steam turbine system of the embodiment of the present application and saving costs, but also reducing the emission of pollutants generated by burning fuel.

[0008] Therefore, the indirect solar-thermal and coal-complementary steam turbine system of the embodiment of the present application has the advantages of low use cost, low energy consumption and environmental protection.

[0009] In some embodiments, the steam generating device comprises: a steam generator having the first water inlet, a third steam outlet and a fourth steam outlet; a first steam heater comprising a first heating inlet and a first heating outlet, the first heating inlet being in communication with the third steam outlet, and the first heating outlet being in communication with the first steam outlet; and a 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, and the second heating outlet being in communication with the first steam outlet.

[0010] In some embodiments, the indirect solar-thermal and coal-complementary steam turbine system further comprises: a first pipeline, one end of the first pipeline being connected to the first steam outlet, and the other end of the first pipeline being connected to the first steam inlet; a second pipeline, one end of the second pipeline being connected to the second steam outlet, and the other end of the second pipeline being connected to the first heat absorption side inlet; and a third pipeline, one end of the third pipeline being connected to the first heat absorption side outlet, and the other end of the third pipeline being connected to the second steam inlet.

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

[0012] In some embodiments, the solar heating device further comprises an energy storage device, the energy storage device comprising: a second heat exchange device, the second heat exchange device comprising a first heat exchange channel and a second heat exchange channel, the first heat exchange channel comprising a first heat exchange inlet and a first heat exchange outlet, the first heat exchange inlet being in communication with the fourth pipeline, the first heat exchange outlet being in communication with the fifth pipeline, a heat storage tank, the heat storage tank comprising a second medium inlet and a second medium outlet, the second heat exchange channel comprising a second heat exchange inlet and a second heat exchange outlet, the second medium inlet being in communication with the second heat exchange inlet, the second medium outlet being in communication with the second heat exchange outlet.

[0013] In some embodiments, the indirect solar-thermal and coal-complementary steam turbine system further comprises a condensing device, the condensing device comprising a third steam inlet and a first water outlet, the intermediate-pressure cylinder having a fifth steam outlet, the low-pressure cylinder having a sixth steam inlet and a sixth steam outlet, the fifth steam outlet being in communication with the sixth steam outlet, the third steam inlet being in communication with the sixth steam outlet, the first water outlet being in communication with the first water inlet.

[0014] In some embodiments, the indirect solar-thermal and coal-complementary steam turbine system further comprises a sixth pipeline, the regenerative system comprising a first regenerative device and a second regenerative device, one end of the sixth pipeline being connected to the first water inlet, the other end of the sixth pipeline being connected to the first water outlet, the other end of the first regenerative pipeline being in communication with the first water outlet, the other end of the second regenerative pipeline being in communication with the first water inlet, the first regenerative device and the second regenerative device being configured to heat water in the sixth pipeline, the first regenerative device and the second regenerative device being arranged on the sixth pipeline, the first regenerative device comprising a fourth steam inlet, the fourth steam inlet being in communication with at least one of the high-pressure cylinder and the intermediate-pressure cylinder, the second regenerative device comprising a fifth steam inlet, the fifth steam inlet being in communication with at least one of the high-pressure cylinder and the intermediate-pressure cylinder.

[0015] In some embodiments, the indirect solar-thermal and coal-complementary steam turbine system further comprises an oxygen removal device, the oxygen removal device being arranged on the sixth pipeline.

[0016] In some embodiments, the indirect solar-thermal and coal-complementary steam turbine system further comprises a water pump, the water pump being arranged on the sixth pipeline.

[0017] The indirect solar-thermal and coal-complementary steam turbine system power generation system according to the embodiments of the present application comprises: a generator; a steam turbine system, which is the indirect solar-thermal and coal-complementary steam turbine system according to any one of the above embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic diagram of an indirect solar-thermal and coal-complementary steam turbine system according to an embodiment of the present application.

[0019] Figure 2 is a structural schematic diagram of a steam generating device according to an embodiment of the present application.

[0020] Reference signs:

[0021] indirect solar-thermal and coal-complementary steam turbine system 100;

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

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

[0024] steam generating device 3; first water inlet 31; first steam outlet 32; steam generator 33; coal 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 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 pipeline 51; second pipeline 52; third pipeline 53; sixth pipeline 54;

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

[0028] regenerative system 7; first regenerative device 70; fourth steam inlet 701; second regenerative device 71; fifth steam inlet 711; deaerating device 8; water pump 9;

[0029] generator 200. DETAILED DESCRIPTION

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

[0031] The following describes an indirect solar thermal and coal-fired complementary steam turbine system 100 according to an embodiment of the present invention with reference to the accompanying drawings.

[0032] like Figures 1-2 As shown, the indirect solar thermal and coal-fired complementary steam turbine system 100 of the embodiment of the present invention includes a solar heating device 1, a first heat exchange device 2, a steam generating device 3 and a steam turbine 4.

[0033] The solar heating device 1 is used to convert solar energy into thermal energy and includes a first medium inlet 11 and a first medium outlet 12. The first heat exchange device 2 includes a first heat-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. The steam generator 3 is used to heat water into steam and includes a first water inlet 31 and a first steam outlet 32. The steam turbine 4 includes a high-pressure cylinder 41, 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 absorption side inlet 21. The intermediate-pressure cylinder 42 includes a second steam inlet 421, and the second steam inlet 421 is connected to the first heat absorption side outlet 22. The intermediate-pressure cylinder 42 and the low-pressure cylinder 43 are connected so that the steam in the intermediate-pressure cylinder 42 can be discharged into the low-pressure cylinder 43.

[0034] The following describes the working process of the indirect solar thermal and coal-fired complementary steam turbine system 100 according to an embodiment of the present invention with reference to the accompanying drawings.

[0035] like Figure 1As shown, water enters the steam generating device 3 through the first water inlet 31 to be heated to form high-temperature and high-pressure main steam, which is discharged from the steam generating device 3 through the first steam outlet 32; the main steam enters the high-pressure cylinder 41 of the steam turbine 4 through the first steam inlet 411 to do work, and the steam after work forms cold reheat steam and is discharged from the second steam outlet 412; the cold reheat steam discharged from the second steam outlet 412 enters the first heat exchange device 2 through the first heat absorption side inlet 21, so that the cold reheat steam exchanges heat with the medium heated by the solar heating device 1 to heat the cold reheat steam to form hot reheat steam, which is discharged from the first heat absorption side outlet 22. Among them, the medium heated by the solar heating device 1 is discharged from the first medium outlet 12, enters the first heat exchange device 2 through the first heat release side inlet 23 to exchange heat with the cold reheat steam, and the medium after heat exchange is discharged from the first heat release side outlet 24 and enters the solar heating device 1 through the first medium inlet 11 to be heated again; the hot reheat steam discharged from the first heat absorption side outlet 22 enters the medium-pressure cylinder 42 through the second steam inlet 421 to do work.

[0036] The steam turbine system in the related art includes a boiler and a steam turbine, and the steam turbine includes a medium-pressure cylinder and a high-pressure cylinder. When the steam turbine system in the related art works, water enters the boiler to be heated to form high-temperature and high-pressure main steam, and the main steam enters the high-pressure cylinder to do work to form cold reheat steam, which needs to be heated again in the boiler to form hot reheat steam for the medium-pressure cylinder to do work. That is, the boiler not only needs to heat water to form high-temperature and high-pressure main steam, but also needs to heat the cold reheat steam again, so the boiler needs to consume a large amount of fuel to heat the cold reheat steam and the water, resulting in a large amount of pollutant emission and high cost of use of the steam turbine system in the related art.

[0037] Compared with the related art, the indirect light-heat and coal-complementary steam turbine system 100 of the embodiment of the present application uses the solar heating device 1 to heat the cold reheat steam instead of the steam generating device 3, so that the heat of the fuel consumed by the steam generating device 3 is reduced, thereby not only reducing the amount of fuel consumed by the indirect light-heat and coal-complementary steam turbine system 100 of the embodiment of the present application and saving the cost, but also reducing the emission of pollutants generated by burning fuel.

[0038] With the indirect light-heat and coal complementary steam turbine system 100 of the embodiment of the present application, the heat consumption of the boiler can be saved by 862.1 GJ / h, and the standard coal can be saved by 31.90 t / h, the coal quantity can be saved by 279487.1 tons per year, the carbon dioxide emission can be reduced by 7322561.6 tons per year, the sulfur dioxide emission can be reduced by 2375.6 tons per year, and the nitrogen oxide emission can be reduced by 2068.2 tons per year, taking the conventional 660 MW steam turbine unit (CLN600-24.2 / 566 / 566, once intermediate reheat, the reheat steam flow being 1422.38 t / h under the THA condition) as an example.

[0039] Therefore, the indirect light-heat and coal complementary steam turbine system 100 of the embodiment of the present application has the advantages of low use cost, low energy consumption and environmental protection.

[0040] As shown in Figure 1 , the power generation system of the embodiment of the present application comprises the indirect light-heat and coal complementary steam turbine system 100 and the generator 200.

[0041] The indirect light-heat and coal complementary steam turbine system 100 comprises the solar heating device 1, the first heat exchange device 2, the steam generating device 3, the steam turbine 4, the condensing device 6, the deaerating device 8, the regenerative system 7 and the water pump 9.

[0042] The first medium inlet 11 of the solar heating device 1 is connected with the first heat release side outlet 24, and the first medium outlet 12 is connected with the first heat release side inlet 23. The second heat exchange device 161 has a first heat exchange inlet 1611, a first heat exchange outlet 1612, a second heat exchange inlet 1613 and a second heat exchange outlet 1614, the first heat exchange outlet 1612 is communicated with the first medium inlet 11, and the first heat exchange inlet 1611 is communicated with the first medium outlet 12.

[0043] The solar heating device 1 further comprises a body 13, a fourth pipeline 14 and a fifth pipeline 15. The body 13 has the first medium inlet 11 and the first medium outlet 12. One end of the fourth pipeline 14 is connected with the first medium outlet 12, and the other end of the fourth pipeline 14 is connected with the first heat release side inlet 23. One end of the fifth pipeline 15 is connected with the first medium inlet 11, and the other end of the fifth pipeline 15 is connected with the first heat release side outlet 24. The body 13 is connected with the first heat release side inlet 23 through the fourth pipeline 14, so that the heated medium enters the first heat exchange device 2. The body 13 is connected with the first heat release side outlet 24 through the fifth pipeline 15, so that the heat exchanged medium returns to the body 13 for heating.

[0044] The body 13 includes a mirror field and a solar tower, so that the light reflected by the mirror field is received by the solar tower and heats the medium in the solar tower. The solar tower has a first medium inlet 11 and a first medium outlet 12, and the medium enters the solar tower from the first medium inlet 11 and is discharged from the first medium outlet 12 after being heated in the solar tower.

[0045] The energy storage device 16 includes a second heat exchange device 161 and a heat storage tank 162, and the heat storage tank 162 has a second medium inlet and a second medium outlet. The second heat exchange device 161 includes a first heat exchange passage and a second heat exchange passage, and the first heat exchange passage includes a first heat exchange inlet 1611 and a first heat exchange outlet 1612, the first heat exchange inlet 1611 is communicated with the fourth pipeline 14, the first heat exchange outlet 1612 is communicated with the fifth pipeline 15, the second medium inlet is communicated with a second heat exchange inlet 1613, and the second medium outlet is communicated with a second heat exchange outlet 1614.

[0046] The medium heated by the body 13 is discharged from the first medium outlet 12, and part of the medium enters the first heat exchange passage through the first heat exchange inlet 1611, and another part of the medium enters the first heat exchange device 2 through the first heat release side inlet 23 to heat the cold reheat steam. The medium in the heat storage tank 162 is discharged from the second heat exchange outlet 1614 and enters the second heat exchange passage, so that the medium discharged from the heat storage tank 162 exchanges heat with the medium in the first heat exchange passage, and the hot medium in the second heat exchange passage after heat exchange returns to the heat storage tank 162, thereby storing part of the heat energy in the heat storage tank 162.

[0047] The hot medium in the heat storage tank 162 enters the second heat exchange passage and exchanges heat with the medium in the first heat exchange passage to heat the medium in the first heat exchange passage. The medium in the first heat exchange passage after being heated 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 steam turbine 4 to operate stably.

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

[0049] The first steam inlet 411 of the high-pressure cylinder 41 is communicated with the first steam outlet 32, the second steam outlet 412 of the high-pressure cylinder 41 is communicated with the first heat absorption side inlet 21, the second steam inlet 421 of the medium-pressure cylinder 42 is communicated with the first heat absorption side outlet 22, the fifth steam outlet 422 of the medium-pressure cylinder 42 is connected with the sixth steam inlet 431 of the low-pressure cylinder 43, and the sixth steam outlet 432 of the low-pressure cylinder 43 is communicated with the first water inlet 31, wherein the sixth steam outlet 432 is connected with the first water inlet 31 through the condensing device 6, the deaerating device 8, the water pump 9 and the regenerative system 7.

[0050] In the case of sufficient sunlight, the medium heated by the 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 heat storage tank 162 is discharged from the second heat exchange outlet 1614 and enters the second heat exchange channel, so that the medium discharged from the heat storage tank 162 exchanges heat with the medium in the first heat exchange channel, and the heated medium in the second heat exchange channel returns to the heat storage tank 162, thereby storing part of the heat energy in the heat storage tank 162.

[0051] In the case of insufficient sunlight, the hot medium in the heat storage tank 162 enters the second heat exchange channel to exchange heat with the medium in the first heat exchange channel to heat 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 the hot reheat steam, thereby ensuring the stable temperature of the hot reheat steam and enabling the steam turbine 4 to operate stably.

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

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

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

[0055] The indirect type photo-thermal and coal complementary steam turbine system 100 of the embodiment of the present application is used, water enters the steam generator 33 through the first water inlet 31 to be heated to form steam, a part of the steam is discharged from the third steam outlet 3341 to enter the first steam heater 34 through the first heating inlet 3411 to be heated to form high temperature and high pressure main steam (24.2 MPa, 566 ℃), and the formed main steam is discharged through the first heating outlet 3431. Another part of the steam is discharged from the third steam outlet 3341 to enter the second steam heater 35 through the second heating inlet 3511 to be heated to form high temperature and high pressure main steam, and the formed main steam is discharged through the second heating outlet 3531. The main steam formed after being heated by the first steam heater 34 and the second steam heater 35 respectively is discharged through the first steam outlet 32.

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

[0057] The steam generating device 3 of the indirect type photo-thermal and coal complementary steam turbine system 100 of the embodiment of the present application can be simply modified by using the 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 with the first outlet of the steam generator 33, so that the reheater heats the steam generated by the steam generating device 3 together with the superheater. Therefore, only part of the pipeline in the traditional boiler needs to be modified to adapt the traditional boiler to the photo-thermal and coal complementary steam turbine system 100 of the embodiment of the present application, and the traditional boiler does not need to be modified on a large scale or the steam generating device 3 needs to be manufactured at a cost, so that the steam generating device 3 of the indirect type photo-thermal and coal complementary steam turbine system 100 of the embodiment of the present application is easy to be modified by using the old one, and has the advantage of low layout cost.

[0058] As shown in Figure 2 The steam generating device 3 of the embodiment of the present application includes the steam generator 33, the first steam heater 34 and the second steam heater 35.

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

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

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

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

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

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

[0065] In some embodiments, as Figure 1 As shown, the indirect solar thermal and coal-fired complementary steam turbine system 100 of the embodiment of the present invention further includes a condensing device 6.

[0066] The condensing device 6 includes a third steam inlet 61 and a first water outlet 62; the intermediate pressure cylinder 42 has a fourth steam outlet 3342, the third steam inlet 61 of the condensing device 6 is connected to the fourth steam outlet 3342, and the first water outlet 62 of the condensing device 6 is connected to the first water inlet 31.

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

[0068] Specifically, the fifth steam outlet 422 of the intermediate pressure cylinder 42 is connected to the sixth steam inlet 431 of the low pressure cylinder 43 , and the sixth steam outlet 432 of the low pressure cylinder 43 is connected to the condensing device 6 , thereby connecting the intermediate pressure cylinder 42 to the condensing device 6 .

[0069] In some embodiments, as Figure 1 As shown, the indirect solar thermal and coal-fired complementary turbine system 100 further includes a sixth pipeline 54, and the heat recovery system includes a first heat recovery device 70 and a second heat recovery device 71. One end of the sixth pipeline 54 is connected to the first water inlet 31, and the other end of the sixth pipeline 54 is connected to the first water outlet 62. The other end of the first heat recovery pipeline 73 is connected to a water outlet 62, and the other end of the second heat recovery pipeline 74 is connected to the first water inlet 31. The first heat recovery device 70 and the second heat recovery device 71 are both used to heat the water in the sixth pipeline 54. The first heat recovery device 70 and the second heat recovery device 71 are both arranged on the sixth pipeline 54. The first heat recovery device 70 includes a fourth steam inlet 701, which is connected to at least one of the high-pressure cylinder 41 and the intermediate-pressure cylinder 42. The second heat recovery 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.

[0070] In other words, the steam in at least one of the high-pressure cylinder 41 and the intermediate-pressure cylinder 42 enters the first heat recovery device 70 through the fourth steam inlet 701, and the steam in at least one of the high-pressure cylinder 41 and the intermediate-pressure cylinder 42 enters the first heat recovery device 71 through the fifth steam inlet 711, so that the steam exchanges heat with the condensed water in the sixth pipeline 54 to heat the condensed water.

[0071] It can be understood that the heat recovery device 71 utilizes the steam in the high-pressure cylinder 41 and / or the low-pressure cylinder 43 to heat the condensed water in the sixth pipeline 54, so that the first heat recovery device 70 and the second heat recovery device 71 heat the condensed water in the sixth pipeline 54, thereby improving the heat utilization rate of the steam.

[0072] In some embodiments, as Figure 1 As shown, the indirect solar thermal and coal-fired complementary steam turbine system 100 of the embodiment of the present invention further includes a water pump 9, which is provided on the sixth pipeline 54. The water pump 9 is used to drive the condensed water in the sixth pipeline 54 to flow, so that the condensed water enters the first water inlet 31.

[0073] In some embodiments, as Figure 1 As shown, the indirect solar thermal and coal-fired complementary steam turbine system 100 of the embodiment of the present invention further includes a deoxygenator 8, which is provided on the sixth pipeline 54. The deoxygenator 8 can remove oxygen from the condensed water in the sixth pipeline 54, thereby ensuring that the steam formed after the condensed water is heated and evaporated again does not contain oxygen, so that the steam will not cause corrosion to the steam turbine 4.

[0074] 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.

[0075] 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.

[0076] In the present application, unless specifically defined otherwise, the terms "mounting", "connected", "connecting", "fixed", "fixedly connected", "connection", "fixedly connected", "connected", "fixed", and the like should be construed broadly, for example, can be fixed connection, can be detachable connection, or integral; can be mechanical connection, can be electrical connection or communication with each other; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0077] In the present application, unless specifically defined otherwise, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0078] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0079] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. An indirect solar thermal and coal-fired complementary steam turbine system, characterized in that: include: A solar heating device for converting solar energy into thermal energy, the solar heating device comprising a first medium inlet and a first medium outlet; a first heat exchange device, the first heat exchange device comprising a first heat absorbing side inlet, a first heat absorbing side outlet, a first heat releasing side inlet, and a first heat releasing side outlet, the first heat releasing side inlet being in communication with the first medium outlet, and the first heat releasing side outlet being in communication with the first medium inlet; a steam generating device for evaporating water into steam, the steam generating device comprising a first water inlet and a first steam outlet; A steam turbine, comprising a high-pressure cylinder, an intermediate-pressure cylinder, and a low-pressure cylinder, wherein the high-pressure cylinder comprises a first steam inlet and a second steam outlet, wherein the first steam inlet is connected to the first steam outlet, and the second steam outlet is connected to the first heat-absorbing side inlet. The intermediate pressure cylinder includes a second steam inlet, which is connected to the first heat absorption side outlet. The intermediate pressure cylinder is connected to the low pressure cylinder so that the steam in the intermediate pressure cylinder is discharged into the low pressure cylinder. 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 indirect solar thermal and coal-fired complementary steam turbine system according to claim 1 is characterized in that: Further including: a first pipeline, one end of the first pipeline being connected to the first steam outlet, and the other end of the first pipeline being connected to the first steam inlet; a second pipeline, one end of the second pipeline being connected to the second steam outlet, and the other end of the second pipeline being connected to the first heat absorbing side inlet; A third pipeline, one end of which is connected to the first heat absorption side outlet, and the third pipeline is connected to the second steam inlet.

3. The indirect solar thermal and coal-fired complementary steam turbine system according to claim 1 is characterized in that: The solar heating device further comprises: a body having a first medium inlet and a first medium outlet; a fourth pipeline, one end of the fourth pipeline being connected to the first medium outlet, and the other end of the fourth pipeline being connected to the first heat release side inlet; A fifth pipeline, one end of which is connected to the first medium inlet, and the other end of which is connected to the first heat release side outlet.

4. The indirect solar thermal and coal-fired complementary steam turbine system according to claim 3 is characterized in that: The solar heating device further comprises an energy storage device, the energy storage device comprising: a second heat exchange device, the second heat exchange device comprising a first heat exchange channel and a second heat exchange channel, the first heat exchange channel comprising a first heat exchange inlet and a first heat exchange outlet, the first heat exchange inlet being in communication with the fourth pipeline, the first heat exchange outlet being in communication with the fifth pipeline, A heat storage tank includes a second medium inlet and a second medium outlet, the second heat exchange channel includes a second heat exchange inlet and a second heat exchange outlet, the second medium inlet is connected to the second heat exchange inlet, and the second medium outlet is connected to the second heat exchange outlet.

5. The indirect solar thermal and coal-fired complementary steam turbine system according to claim 1 is characterized in that: Further including: A condensing device, the condensing device includes a third steam inlet and a first water outlet, the intermediate pressure cylinder has a fifth steam outlet, the low pressure cylinder has a sixth steam inlet and a sixth steam outlet, the fifth steam outlet is connected to the sixth steam outlet, the third steam inlet is connected to the sixth steam outlet, and the first water outlet is connected to the first water inlet.

6. The indirect solar thermal and coal-fired complementary steam turbine system according to claim 5 is characterized in that: It further comprises a sixth pipeline and a heat recovery system, wherein the heat recovery system comprises a first heat recovery device and a second heat recovery device, One end of the sixth pipeline is connected to the first water inlet, and the other end of the sixth pipeline is connected to the first water outlet. One end of the first heat recovery pipeline is connected to the first water outlet, and one end of the second heat recovery pipeline is connected to the first water inlet. The first heat recovery device and the second heat recovery device are both used to heat the water in the sixth pipeline. The first heat recovery device and the second heat recovery device are both arranged on the sixth pipeline. The first heat recovery device includes a fourth steam inlet, and the fourth steam inlet is connected to at least one of the high-pressure cylinder and the intermediate-pressure cylinder. The second heat recovery device includes a fifth steam inlet, which is connected to at least one of the high-pressure cylinder and the intermediate-pressure cylinder.

7. The indirect solar thermal and coal-fired complementary steam turbine system according to claim 6 is characterized in that: Further including: A water pump is provided on the sixth pipeline.

8. The indirect solar thermal and coal-fired complementary steam turbine system according to claim 6 is characterized in that: Further including: A deoxygenation device is provided on the sixth pipeline.

9. A power generation system, characterized in that: include: dynamo; A steam turbine system, wherein the steam turbine system is an indirect solar thermal and coal-fired complementary steam turbine system as described in any one of claims 1 to 8.

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