Indirect optical-coal complementary steam turbine system and power generation system

Abstract

The present invention provides an indirect solar-thermal coal complementary steam turbine system and a power generation system. The indirect solar-thermal coal complementary steam turbine system includes: a solar heating device, a first heat exchange device, a steam turbine, an air heat exchange device, and a steam generation device. The solar heating device includes a first medium inlet and a first medium outlet; the first heat exchange device includes 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 generation device includes 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 includes 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 solar-thermal coal complementary steam turbine system of the present invention has the advantages of low use cost, less energy consumption, and environmental protection.

Description

Technical Field

[0001] The present invention relates to the technical field of steam turbine power generation, and particularly relates to an indirect solar-thermal coal complementary steam turbine system and a power generation system. Background Art

[0002] A steam turbine is a rotary steam power device and is one of the main equipment for modern thermal power generation. The steam turbine power generation system in the related art uses the steam turbine to do work and then drives the generator to generate electricity. However, the coal consumption of the steam turbine power generation system in the related art is large, resulting in more pollutant emissions and higher power generation costs of the steam turbine power generation system. Summary of the Invention

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

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

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

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

[0007] The indirect solar-thermal coal complementary steam turbine system of the embodiment of the present invention uses the solar heating device to replace the steam generating device to heat the cold reheat steam, so that the heat of the fuel consumed by the steam generating device is reduced. Therefore, not only the fuel consumption of the indirect solar-thermal coal complementary steam turbine system of the embodiment of the present invention is reduced, the cost is saved, but also the emissions of pollutants generated by burning the fuel are reduced.

[0008] Thus, the indirect light-coal complementary steam turbine system according to the embodiments of the present invention has the advantages of low usage cost, low energy consumption, and environmental friendliness.

[0009] In some embodiments, the steam generating device includes: a steam generator having the first water inlet, the third steam outlet, and the fourth steam outlet; a first steam heater including 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 including 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 light-coal complementary steam turbine system further includes: 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 third pipeline being connected to the second steam inlet.

[0011] In some embodiments, the solar heating device further includes: a body having a first medium inlet and a first medium outlet; a fourth 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 includes an energy storage device, the energy storage device including: a second heat exchange device including a first heat exchange channel and a second heat exchange channel, the first heat exchange channel including a first heat exchange inlet and a first heat exchange outlet, the first heat exchange inlet being in communication with the fourth pipeline, and the first heat exchange outlet being in communication with the fifth pipeline, and a heat storage tank including a third medium inlet and a third medium outlet, the second heat exchange channel including a second heat exchange inlet and a second heat exchange outlet, the third medium inlet being in communication with the second heat exchange inlet, and the third medium outlet being in communication with the second heat exchange outlet.

[0013] In some embodiments, the indirect light-coal complementary steam turbine system further includes: a condensing device, the condensing device includes a third steam inlet and a first water outlet, the intermediate pressure cylinder has a fifth steam outlet, the third steam inlet is communicated with the fifth steam outlet, and the first water outlet is communicated with the first water inlet.

[0014] In some embodiments, the indirect light-coal complementary steam turbine system further includes a regenerative system, the regenerative system includes a third heat exchange device, a first regenerative pipeline and a second regenerative pipeline, the third heat exchange device includes a second heat absorption side inlet, a second heat absorption side outlet, a second heat release side inlet and a second heat release side outlet, the second heat release side inlet is communicated with the first heat release side outlet, the second heat release side outlet is connected to the first medium inlet, one end of the first regenerative pipeline is connected to the second heat absorption side inlet, the other end of the first regenerative pipeline is communicated with the first water outlet, one end of the second regenerative pipeline is connected to the second heat absorption side outlet, and the other end of the second regenerative pipeline is communicated with the first water inlet.

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

[0016] In some embodiments, the indirect light-coal complementary steam turbine system further includes: a deaerator, and the deaerator is arranged on the sixth pipeline.

[0017] The indirect light-coal complementary steam turbine system power generation system according to the embodiments of the present invention includes: a generator; a steam turbine system, and the steam turbine system is the indirect light-coal complementary steam turbine system described in any of the above embodiments. Description of the Drawings

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

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

[0020] Reference numerals:

[0021] Indirect solar-thermal 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; Economizer 331; Water wall 332; Steam-water separator 333; Horizontal low-temperature superheater 334; Third steam outlet 3341; Fourth steam outlet 3342; First steam heater 34; Vertical low-temperature superheater 341; First heating inlet 3411; Platen superheater 342; Final superheater 343; First heating outlet 3431; Second steam heater 35; Horizontal low-temperature reheater 351; Second heating inlet 3511; Vertical low-temperature reheater 352; Final reheater 353; Second heating outlet 3531;

[0025] Steam turbine 4; High-pressure cylinder 41; First steam inlet 411; Second steam outlet 412; Intermediate-pressure cylinder 42; Second steam inlet 421; Fifth steam outlet 422; Low-pressure cylinder 43; Sixth steam inlet 431; Sixth steam outlet 432;

[0026] First pipeline 51; Second pipeline 52; Third pipeline 53; Sixth pipeline 54; Second water outlet 541; Second water inlet 542;

[0027] Condensing device 6; Third steam inlet 61; First water outlet 62;

[0028] Regenerative system 7; First regenerative device 70; Fourth steam inlet 701; Second regenerative device 71; Fifth steam inlet 711; Third heat exchange device 72; Second heat absorption side inlet 721; Second heat absorption side outlet 722; Second heat release side inlet 723; Second heat release side outlet 724; First regenerative pipeline 73; Second regenerative pipeline 74; Deaerator 8; Water pump 9;

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

[0030] Generator 200. Specific embodiments

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

[0032] The indirect solar-thermal coal complementary steam turbine system 100 of the embodiments of the present invention will be described below with reference to the accompanying drawings.

[0033] As Figure 1 - Figure 2 shown, the indirect solar-thermal coal complementary steam turbine system 100 of the embodiments of the present invention includes a solar heating device 1, a first heat exchange device 2, an air heat exchange device 10, a steam generation device 3, and a steam turbine 4.

[0034] The solar heating device 1 is used to convert solar energy into heat energy. The solar heating device 1 includes a first medium inlet 11 and a first medium outlet 12. The first heat exchange device 2 includes a first heat absorption side inlet 21, a first heat absorption side outlet 22, a first heat release side inlet 23, and a first heat release side outlet 24. The first heat release side inlet 23 is communicated with the first medium outlet 12, and the first heat release side outlet 24 is communicated with the first medium inlet 11. The steam generation device 3 is used to heat water into steam. The steam generation device 3 includes a first water inlet 31 and a first steam outlet 32. The steam turbine 4 includes a high-pressure cylinder 41 and an intermediate-pressure cylinder 42. The high-pressure cylinder 41 includes a first steam inlet 411 and a second steam outlet 412. The first steam inlet 411 is communicated with the first steam outlet 32, and the second steam outlet 412 is communicated with 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 communicated with the first heat absorption side outlet 22. The air heat exchange device 10 includes a second medium inlet 101, a second medium outlet 102, an air inlet 103, and an air outlet 104. The second medium inlet 101 is communicated with the first heat release side outlet 24, and the second medium outlet 102 is communicated with the first medium inlet 12.

[0035] The working process of the indirect solar-thermal coal complementary steam turbine system 100 of the embodiments of the present invention will be described below with reference to the accompanying drawings.

[0036] As Figure 1As 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. The main steam is discharged from the steam generating device 3 through the first steam outlet 32. The main steam enters the high-pressure cylinder 41 of the steam turbine 4 through the first steam inlet 411 to do work, and the steam doing work forms cold reheat steam and is discharged from the second steam outlet 412. The cold reheat steam discharged from the second steam outlet 412 enters the first heat exchange device 2 through the first heat absorption side inlet 21, so that the cold reheat steam exchanges heat with the medium heated by the solar heating device 1, thereby heating up the cold reheat steam to form hot reheat steam, and the hot reheat steam is discharged from the first heat absorption side outlet 22. Among them, the medium heated by the solar heating device 1 is discharged from the first medium outlet 12, enters the first heat exchange device 2 through the first heat release side inlet 23 to exchange heat with the cold reheat steam, and the medium after heat exchange is discharged from the first heat release side outlet 24 and enters the solar heating device 1 through the first medium inlet 11 for reheating. The hot reheat steam discharged from the first heat absorption side outlet 22 enters the intermediate-pressure cylinder 42 of the steam turbine 4 through the second steam inlet 421 to do work.

[0037] The outside air enters the air heat exchange device 10 through the air inlet 103, and the medium heated by the solar heating device 1 enters the air heat exchange device 10 through the second medium inlet 101 of the medium, so that the hot medium exchanges heat with the air to heat the air, and the heated air is discharged from the air outlet 104. The heated air can be used for purposes such as drying fuel.

[0038] The steam turbine system in the related art includes a boiler and a steam turbine, and the steam turbine includes an intermediate-pressure cylinder and a high-pressure cylinder. When the steam turbine system in the related art works, water enters the boiler for heating treatment to form high-temperature and high-pressure main steam. The main steam enters the high-pressure cylinder to do work and then forms cold reheat steam. The cold reheat steam needs to enter the boiler again for heating to form hot reheat steam for the intermediate-pressure cylinder to do work. That is to say, the boiler not only needs to heat water to form high-temperature and high-pressure main steam, but also needs to reheat the cold reheat steam. Therefore, the boiler consumes more fuel when heating the cold reheat steam and water, resulting in more pollutant emissions and higher use costs in the steam turbine 4 system in the related art.

[0039] Compared with the related art, the indirect solar-thermal coal complementary steam turbine system 100 of the embodiment of the present invention uses the solar heating device 1 to replace the steam generating device 3 to heat the cold reheat steam, reducing the heat of the fuel consumed by the steam generating device 3. Therefore, not only the fuel consumption of the indirect solar-thermal coal complementary steam turbine system 100 of the embodiment of the present invention is reduced, the cost is saved, but also the emissions of pollutants generated by burning fuel are reduced.

[0040] Taking the indirect solar-thermal combined steam turbine system 100 of the embodiment of the present invention as an example, for a conventional 660MW steam turbine unit (CLN600-24.2 / 566 / 566, once-through reheat, the reheat steam flow rate is 1422.38t / h under THA condition), the boiler heat consumption can be saved by 862.1GJ / h. Calculated according to the boiler thermal efficiency of 0.92, it is equivalent to saving 31.97t / h of standard coal, saving 280,096.7 tons of coal annually, reducing carbon dioxide emissions by 7,338,480.2 tons annually, reducing sulfur dioxide emissions by 2,380.8 tons annually, and reducing nitrogen oxide emissions by 2,072.7 tons annually.

[0041] Therefore, the indirect solar-thermal combined steam turbine system 100 of the embodiment of the present invention has the advantages of low usage cost, low energy consumption and environmental protection.

[0042] As Figure 1 shown, the power generation system of the embodiment of the present invention includes the indirect solar-thermal combined steam turbine system 100 and the generator 200 of the above embodiment.

[0043] Among them, the indirect solar-thermal combined steam turbine system 100 includes a solar heating device 1, a first heat exchange device 2, a steam generation device 3, a steam turbine 4, a condensation device 6, a deaeration device 8, a regenerative system 7 and a water pump 9.

[0044] The solar heating device 1 includes a body 13, a heat storage tank 162 and a second heat exchange device 161. The body 13 has a first medium inlet 11 and a first medium outlet 12. 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 first medium inlet 11 is connected to the first heat release side outlet 24, and the first medium outlet 12 is connected to the first heat release side inlet 23. The second heat exchange device 161 has a first heat exchange inlet 1611, a first heat exchange outlet 1612, a second heat exchange inlet 1613 and a second heat exchange outlet 1614. The heat storage tank 162 has a third medium inlet and a third medium outlet. The first heat exchange outlet 1612 is communicated with the first medium inlet 11, the first heat exchange inlet 1611 is communicated with the first medium outlet 12, the third medium inlet is communicated with the second heat exchange inlet 1613, and the third medium outlet is communicated with the second heat exchange outlet 1614.

[0046] The solar heating device 1 further includes a fourth pipeline 14 and a fifth pipeline 15. One end of the fourth pipeline 14 is connected to the first medium outlet 12, and the other end of the fourth pipeline 14 is connected to the first heat release side inlet 23; one end of the fifth pipeline 15 is connected to the first medium inlet 11, and the other end of the fifth pipeline 15 is connected to the first heat release side outlet 24. The main body 13 is connected to 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 main body 13 is connected to the first heat release side outlet 24 through the fifth pipeline 15 so that the heat-exchanged medium returns to the main body 13 for heating.

[0047] The main body 13 includes a mirror field, a solar tower, and a energy storage device 16. The mirror field cooperates with the solar tower so that the light energy reflected by the mirror field is received by the solar tower and heats the medium in the solar tower. The energy storage device 16 includes a second heat exchange device 161 and a heat storage tank 162. The second heat exchange device 161 includes a first heat exchange channel and a second heat exchange channel. The first heat exchange channel includes a first heat exchange inlet 1611 and a first heat exchange outlet 1612. The first heat exchange inlet 1611 is communicated with the fourth pipeline 14, and the first heat exchange outlet 1612 is communicated with the fifth pipeline 15.

[0048] The medium heated by the main body 13 is discharged through the first medium outlet 12. A part of the medium enters the first heat exchange channel through the first heat exchange inlet 1611, and 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 channel, so that the medium discharged from the heat storage tank 162 exchanges heat with the medium in the first heat exchange channel. The hot medium in the second heat exchange channel after heat exchange returns to the heat storage tank 162, thereby storing a part of the heat energy in the heat storage tank 162.

[0049] 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 medium in the first heat exchange channel after heating enters the first heat release side inlet 23 to heat the cold reheat steam to form hot reheat steam, thereby ensuring the stable temperature of the hot reheat steam and enabling the steam turbine 4 to operate stably.

[0050] The steam turbine 4 includes a high-pressure cylinder 41, a medium-pressure cylinder 42, and a low-pressure cylinder 43. The low-pressure cylinder 43 includes a sixth steam inlet 431 and a sixth steam outlet 432. The medium-pressure cylinder 42 further includes a fifth steam outlet 422. The steam turbine 4 does work to drive the generator 200 to generate electricity. The first heat release side inlet 23 of the first heat exchange device 2 is communicated with the first medium outlet 12, and the first heat release side outlet 24 is communicated with the first medium inlet 11.

[0051] The first steam inlet 411 of the high-pressure cylinder 41 is communicated with the first steam outlet 32, the second steam outlet 412 of the high-pressure cylinder 41 is communicated with the first heat absorption side inlet 21, the second steam inlet 421 of the intermediate-pressure cylinder 42 is communicated with the first heat absorption side outlet 22, the fifth steam outlet 422 of the intermediate-pressure cylinder 42 is connected to the sixth steam inlet 431 of the low-pressure cylinder 43, and the sixth steam outlet 432 of the low-pressure cylinder 43 is communicated with the first water inlet 31. Among them, a condensing device 6, a deaerating device 8, a water pump 9 and a regenerative system 7 are connected between the sixth steam outlet 432 and the first water inlet 31.

[0052] Under the condition of sufficient sunlight, the medium heated by the main body 13 is discharged through the first medium outlet 12. A part of the medium enters the first heat exchange channel through the first heat exchange inlet 1611, and 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 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 a part of the thermal energy in the heat storage tank 162.

[0053] Under the condition 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 hot reheat steam, thereby ensuring the stable temperature of the hot reheat steam and enabling the steam turbine 4 to operate stably.

[0054] The power generation system according to the embodiment of the present invention has the advantages of low use cost, low energy consumption and environmental protection.

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

[0056] The steam generator 33 has a first water inlet 31, a third steam outlet 3341 and a fourth steam outlet 3342; the first steam heater 34 includes a first heating inlet 3411 and a first heating outlet 3431, the first heating inlet 3411 is 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.

[0057] Using the indirect light-coal complementary steam turbine system 100 according to the embodiment of the present invention, water enters the steam generator 33 through the first water inlet 31 and is heated to form steam. A part of the steam is discharged from the third steam outlet 3341, enters the first steam heater 34 through the first heating inlet 3411, and is heated to form main steam at high temperature and high pressure (24.2 MPa, 566 °C). The formed main steam is discharged through the first heating outlet 3431. Another part of the steam is discharged from the third steam outlet 3341, enters the second steam heater 35 through the second heating inlet 3511, and is heated to form main steam at high temperature and high pressure. 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.

[0058] The boilers in the related art include a steam generator, a superheater, and a reheater. The steam generator has a first outlet and a second outlet. The superheater has a steam inlet and a main steam outlet. The reheater includes a cold reheat steam inlet and a hot reheat steam outlet. Both the first outlet and the second outlet are communicated with the steam inlet. Steam is discharged from the first outlet and the second outlet and enters the superheater for heating to form main steam. The main steam is discharged through the main steam outlet for use by the high-pressure cylinder of the steam turbine. The cold reheat steam generated after working in the high-pressure cylinder needs to return to the traditional boiler again, and enters the reheater through the cold reheat steam inlet for heating to form hot reheat steam. The hot reheat steam is discharged from the hot reheat steam outlet for use by the intermediate-pressure cylinder.

[0059] The steam generating device 3 of the light heat and coal complementary steam turbine system 100 according to the embodiment of the present invention can be simply modified by using the boiler in the related art. Disconnect the first outlet of the steam generator 33 of the boiler in the related art from the steam inlet, and connect the cold reheat steam inlet of the reheater to the first outlet of the steam generator 33, so that the reheater and the superheater together heat the steam generated by the steam generating device 3. Thus, only some pipelines in the traditional boiler need to be modified to make the traditional boiler adapt to the indirect light-coal complementary steam turbine system 100 according to the embodiment of the present invention, without large-scale modification of the traditional boiler or costly manufacturing of the steam generating device 3. Therefore, the steam generating device 3 of the light heat and coal complementary steam turbine system 100 according to the embodiment of the present invention is easy to reuse and transform, and has the advantage of low layout cost.

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

[0061] The steam generator 33 includes an economizer 331, a water wall 332, a steam-water separator 333, and a horizontal low-temperature superheater 334. The economizer 331 has a first water inlet 31, and the economizer 331, the water wall 332, the steam-water separator 333, and the horizontal low-temperature superheater 334 are connected in sequence. The economizer 331 and the water wall 332 are used to heat water to generate steam, the steam-water separator 333 is used to separate the unevaporated water in the steam, and the separated water returns to the water wall 332 to be heated and evaporated again. The horizontal low-temperature superheater 334 includes a third steam outlet 3341 and a fourth steam outlet 3342.

[0062] The first steam heater 34 includes a vertical low-temperature superheater 341, a platen superheater 342, and a final-stage superheater 343. Among them, the vertical low-temperature superheater 341 includes a first heating inlet 3411, the final-stage superheater 343 has a first heating outlet 3431, the first heating inlet 3411 is communicated with the third steam outlet 3341, and the vertical low-temperature superheater 341, the platen superheater 342, and the final-stage superheater 343 are communicated in sequence, so as to heat the steam to form high-temperature and high-pressure main steam.

[0063] The second steam heater 35 includes a horizontal low-temperature reheater 351, a vertical low-temperature reheater 352, and a final-stage reheater 353. Among them, the horizontal low-temperature reheater 351 includes a second heating inlet 3511, the final-stage reheater 353 has a second heating outlet 3531, the second heating inlet 3511 is communicated with the fourth steam outlet 3342, and the horizontal low-temperature reheater 351, the vertical low-temperature reheater 352, and the final-stage reheater 353 are communicated in sequence, so as to heat the steam to form high-temperature and high-pressure main steam.

[0064] In some embodiments, as Figure 1 shown, the indirect light-coal 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.

[0065] 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.

[0066] In other words, the high-pressure cylinder 41 is connected to the steam generating device 3 through the first pipeline 51 so that the main steam generated by the steam generating device 3 enters the high-pressure cylinder 41. The high-pressure cylinder 41 is connected to the first heat exchange device 2 through the second pipeline 52 so that the first heat exchange device 2 heats the cold reheat steam discharged from the high-pressure cylinder 41 to form hot reheat steam. The intermediate-pressure cylinder 42 is connected to the first heat exchange device 2 through the third pipeline 53 so that the hot reheat steam enters the intermediate-pressure cylinder 42.

[0067] In some embodiments, as Figure 1 shown, the indirect solar-thermal coal complementary steam turbine system 100 of the embodiment of the present invention further includes a condensing device 6.

[0068] The condensing device 6 includes a third steam inlet 61 and a first water outlet 62; the intermediate-pressure cylinder 42 has a fourth steam outlet 3342, the third steam inlet 61 of the condensing device 6 is connected to the fourth steam outlet 3342, and the first water outlet 62 of the condensing device 6 is connected to the first water inlet 31.

[0069] In other words, the intermediate-pressure cylinder 42 is connected to the condensing device 6 so that the steam discharged from the intermediate-pressure cylinder 42 is condensed into water by the condensing device 6. The condensing device 6 is connected to the first water inlet 31 so that the condensed water enters the steam generating device 3 for recycling, thereby improving the utilization rate of water.

[0070] Specifically, the fifth steam outlet 422 of the intermediate-pressure cylinder 42 is connected to the sixth steam inlet 431 of the low-pressure cylinder 43, and the sixth steam outlet 432 of the low-pressure cylinder 43 is connected to the condensing device 6, so that the intermediate-pressure cylinder 42 is connected to the condensing device 6.

[0071] In some embodiments, as Figure 1 shown, the indirect solar-thermal coal complementary steam turbine system 100 of the embodiment of the present invention further includes a regenerative system 7. The regenerative system 7 includes a third heat exchange device 72, a first regenerative pipeline 73 and a second regenerative pipeline 74.

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

[0073] The water discharged from the condensing device 6 enters the third heat exchange device 72 through the first regenerative pipeline 73. The third heat exchange device 72 uses the waste heat after heat exchange between the solar heating device 1 and the first heat exchange device 2 to heat the water, thereby increasing the water temperature of the condensed water, further reducing the heat that needs to be released when the steam generating device 3 heats the water, and thus further reducing the fuel consumption of the indirect solar-thermal coal complementary steam turbine system 100 of the embodiment of the present invention and the emission of pollutants generated by burning the fuel.

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

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

[0076] It can be understood that the regenerative device 71 uses the steam in the high-pressure cylinder 41 and / or the low-pressure cylinder 43 to heat the condensed water in the sixth pipeline 54. When the sunlight is insufficient, that is, when the heat provided by the solar heating device 1 is insufficient, the second regenerative device 71 is used to assist in heating the condensed water in the sixth pipeline 54, thereby improving the heat utilization rate of the steam.

[0077] In some embodiments, as Figure 1As shown in the figure, the indirect light-coal complementary steam turbine system 100 of the embodiment of the present invention further includes a water pump 9, and the water pump 9 is arranged on the sixth pipeline 54. The water pump 9 is used to drive the condensate to flow in the sixth pipeline 54, so that the condensate enters the first water inlet 31.

[0078] In some embodiments, as Figure 1 shown, the indirect light-coal complementary steam turbine system 100 of the embodiment of the present invention further includes a deaerator 8, and the deaerator 8 is arranged on the sixth pipeline 54. The deaerator 8 can be used to remove the oxygen in the condensate in the sixth pipeline 54, so as to ensure that the steam formed after the condensate is reheated and evaporated again does not contain oxygen, and the steam will not erode the steam turbine 4.

[0079] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 construed as a limitation to the present invention.

[0080] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0081] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0082] In the present invention, unless otherwise clearly defined or limited, a first feature being "on" or "under" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact via an intermediate medium. Moreover, a first feature being "above", "over" and "on top of" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. A first feature being "under", "below" and "beneath" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0083] In the present invention, the terms "an embodiment", "some embodiments", "example", "specific example", or "some examples", etc. 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 invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples.

[0084] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. An indirect light-coal complementary steam turbine system, characterized in that Comprising: 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; A steam generating device for evaporating water into steam, the steam generating device comprising a first water inlet and a first steam outlet; A steam turbine, the steam turbine comprising a high-pressure cylinder and an intermediate-pressure cylinder, the high-pressure cylinder comprising a first steam inlet and a second steam outlet, the first steam inlet communicating with the first steam outlet, the second steam outlet communicating with the first heat absorption side inlet, The intermediate-pressure cylinder comprising a second steam inlet, the second steam inlet communicating with the first heat absorption side outlet, An air heat exchange device, the air heat exchange device comprising a second medium inlet, a second medium outlet, an air inlet and an air outlet, the second medium inlet communicating with the first heat release side outlet, the second medium outlet communicating with the first medium inlet; 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, the first steam heater comprising a first heating inlet and a first heating outlet, the first heating inlet communicating with the third steam outlet, the first heating outlet communicating with the first steam outlet; and A second steam heater, the second steam heater comprising a second heating inlet and a second heating outlet, the second heating inlet communicating with the fourth steam outlet, the second heating outlet communicating with the first steam outlet.

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

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

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

5. The indirect light-coal complementary steam turbine system according to claim 1, characterized in that Further comprising: A condensing device, the condensing device includes a third steam inlet and a first water outlet, the intermediate pressure cylinder has a fifth steam outlet, the third steam inlet is communicated with the fifth steam outlet, and the first water outlet is communicated with the first water inlet.

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

7. The indirect light-coal complementary steam turbine system according to claim 6, wherein Further comprising a sixth pipeline, the regenerative system includes a first regenerative device and a second regenerative device, One end of the sixth pipeline is connected to the first water inlet, the other end of the sixth pipeline is connected to the first water outlet, the sixth pipeline includes a second water inlet and a second water outlet, the other end of the first regenerative pipeline is communicated with the first water outlet, and the other end of the second regenerative pipeline is communicated with the first water inlet, Both the first regenerative device and the second regenerative device are used to heat the water in the sixth pipeline, and both the first regenerative device and the second regenerative device are arranged on the sixth pipeline, The first regenerative device includes a fourth steam inlet, the fourth steam inlet is communicated with at least one of the high pressure cylinder and the intermediate pressure cylinder, and the first regenerative device is located between the second water inlet and the second water outlet, The second regenerative device includes a fifth steam inlet, the fifth steam inlet is communicated with at least one of the high pressure cylinder and the intermediate pressure cylinder, and the second regenerative device is located between the second water inlet and the first water inlet.

8. The indirect light-coal complementary steam turbine system according to claim 7, characterized in that, Further comprising: An deaeration device, the deaeration device is arranged on the sixth pipeline.

9. A power generation system, characterized in that, Comprising: A generator; A steam turbine system, the steam turbine system is the indirect solar-thermal coal complementary steam turbine system according to any one of claims 1-8.

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