CN115234333B - A thermal power generation system with supercritical carbon dioxide and steam dual working fluid circulation - Google Patents
A thermal power generation system with supercritical carbon dioxide and steam dual working fluid circulation Download PDFInfo
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- CN115234333B CN115234333B CN202210730181.8A CN202210730181A CN115234333B CN 115234333 B CN115234333 B CN 115234333B CN 202210730181 A CN202210730181 A CN 202210730181A CN 115234333 B CN115234333 B CN 115234333B
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 134
- 238000010248 power generation Methods 0.000 title claims abstract description 88
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 67
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 67
- 230000009977 dual effect Effects 0.000 title claims 3
- 239000012530 fluid Substances 0.000 title 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000005192 partition Methods 0.000 claims description 3
- 239000000446 fuel Substances 0.000 abstract description 7
- 238000002485 combustion reaction Methods 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 33
- 238000010438 heat treatment Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000003303 reheating Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
- F01K25/103—Carbon dioxide
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/006—Auxiliaries or details not otherwise provided for
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
A thermal power generation system with double working medium circulation of supercritical carbon dioxide and steam comprises a steam power generation system and a boiler, and further comprises the supercritical carbon dioxide power generation system, wherein a water outlet of a high-pressure heater of the steam power generation system is connected with an inlet of an economizer of the boiler, an outlet of a superheater of the boiler is connected with an inlet of a high-pressure cylinder of a steam turbine of the steam power generation system, a primary gas outlet of a final superheater of the boiler is connected with an inlet of a high-pressure turbine of the supercritical carbon dioxide power generation system, a secondary gas outlet of a final reheater of the boiler is connected with an inlet of a low-pressure turbine of the supercritical carbon dioxide power generation system, a secondary gas inlet of a low-temperature reheater of the boiler is connected with a primary gas outlet of the high-pressure turbine, and a gas supply outlet of a high-temperature reheater of the supercritical carbon dioxide is connected with a gas inlet of a low-temperature superheater of the boiler. The invention improves the energy utilization efficiency and can realize the cascade utilization of heat generated by fuel combustion.
Description
Technical Field
The invention relates to a power generation system, in particular to a thermal power generation system with supercritical carbon dioxide and steam double working medium circulation.
Background
The traditional thermal power generation system based on the steam Rankine cycle is mature and stable, the utilization rate of heat released by the combustion of the fuel by the boiler is high, but the steam power generation efficiency is difficult to break through further due to the limit of the Rankine cycle configuration under the existing parameters and the material technical level. The novel power cycle using supercritical carbon dioxide as a working medium has the advantages that the physical properties of the working medium are well matched with the cycle characteristics, higher power generation efficiency can be realized under the condition that the same working medium parameters as those of steam cycle are maintained, but the problems of difficult utilization of boiler waste heat, low utilization rate of heat released by fuel combustion and the like exist.
In summary, the system is independently used as a power generation system, and has the defects that the energy utilization efficiency is low, and the heat generated by fuel combustion cannot be effectively utilized.
Disclosure of Invention
The invention provides a thermal power generation system with supercritical carbon dioxide and steam double working medium circulation for overcoming the defects of the prior art.
A thermal power generation system with double working medium circulation of supercritical carbon dioxide and steam comprises a steam power generation system and a boiler, and further comprises the supercritical carbon dioxide power generation system, wherein a water outlet of a high-pressure heater of the steam power generation system is connected with an inlet of an economizer of the boiler, an outlet of a superheater of the boiler is connected with an inlet of a high-pressure cylinder of a steam turbine of the steam power generation system, a primary gas outlet of a final superheater of the boiler is connected with an inlet of a high-pressure turbine of the supercritical carbon dioxide power generation system, a secondary gas outlet of a final reheater of the boiler is connected with an inlet of a low-pressure turbine of the supercritical carbon dioxide power generation system, a secondary gas inlet of a low-temperature reheater of the boiler is connected with a primary gas outlet of the high-pressure turbine, and a gas supply outlet of a high-temperature reheater of the supercritical carbon dioxide is connected with a gas inlet of a low-temperature superheater of the boiler.
Compared with the prior art, the invention has the beneficial effects that:
The supercritical carbon dioxide and steam double-working-medium circulation power generation system established by the invention shares one boiler as a heat source, is suitable for the design of the double-working-medium circulation boiler, is simultaneously provided with a water working medium and a supercritical carbon dioxide heating surface, and the two working mediums are heated to rated parameters and then enter respective power generation systems for power generation. The invention can realize the cascade utilization of heat generated by fuel combustion, and further improves the energy utilization efficiency by utilizing the respective characteristics of two cycles. The system can be newly built or can be modified from the viewpoint of saving equipment investment by utilizing equipment facilities of the existing unit, and directly saves the equipment investment of water treatment equipment and turbo generator units.
The technical scheme of the invention is further described below with reference to the accompanying drawings and examples:
Drawings
FIG. 1 is a schematic view of a thermal power generation system according to embodiment 1 of the present invention;
fig. 2 is a schematic view of a thermal power generation system according to embodiment 2 of the present invention.
Detailed Description
The first embodiment is described with reference to fig. 1-2, and the thermal power generation system with double working medium circulation of supercritical carbon dioxide and steam in the embodiment comprises a steam power generation system C and a boiler E, and also comprises a supercritical carbon dioxide power generation system D, wherein a water outlet of a high-pressure heater 18 of the steam power generation system C is connected with an economizer inlet of the boiler E, an outlet of a superheater of the boiler is connected with an inlet of a high-pressure cylinder 13 of a steam turbine of the steam power generation system, a primary gas outlet of a final superheater of the boiler E is connected with an inlet of a high-pressure turbine 20 of the supercritical carbon dioxide power generation system D, a secondary gas outlet of a final reheater of the boiler E is connected with an inlet of a low-pressure turbine 21 of the supercritical carbon dioxide power generation system D, and a secondary gas inlet of a low-temperature reheater of the boiler E is connected with a gas inlet of a low-temperature superheater of the boiler E.
Further, as shown in fig. 1-2, the generator 27 of the supercritical carbon dioxide power generation system D is connected to the high-pressure turbine 20, the high-pressure turbine 20 is connected to the low-pressure turbine 21, the low-pressure turbine 21 is connected to the recompressor 22, the recompression 22 is connected to the main compressor 24, the main compressor 24 is connected to the cooler 23, the low-pressure turbine 21 is connected to the high-temperature regenerator 25, and the cooler 23 is connected to the low-temperature regenerator 26.
The embodiment combines the characteristics of high supercritical carbon dioxide efficiency in a high-parameter area and high steam power generation efficiency in a low-parameter area, designs a double-station circulating power generation scheme of supercritical carbon dioxide and steam, and realizes the coupling of the steam power generation Rankine cycle and the supercritical carbon dioxide power generation Brayton cycle. On one hand, the design difficulty of the high-capacity supercritical carbon dioxide boiler under the condition of the prior art is solved, the consumption of expensive metal materials of the boiler is reduced, meanwhile, the high-efficiency heat transfer heating surface of the supercritical carbon dioxide is selectively arranged in the boiler, the heating resistance loss of the supercritical carbon dioxide is greatly reduced, and the Brayton cycle efficiency is improved. On the other hand, the exhaust gas waste heat can be effectively utilized by utilizing the steam boiler, and the defect of the supercritical carbon dioxide power generation system is overcome.
Typically, the generator C19 of the steam power generation system C is connected to the low pressure cylinder 14, the turbine low pressure cylinder 14 is connected to the turbine high pressure cylinder 13, the turbine high pressure cylinder 13 is connected to the high pressure heater 18, the high pressure heater 18 is connected to the deaerator 17, the deaerator 17 is connected to the high pressure heater 18 through the feed pump 28, the deaerator 17 is connected to the low pressure heater 16, the condenser 15 is connected to the low pressure heater 16, and at the same time, the condenser 15 is connected to the low pressure heater 16 through the condensate pump 29.
Based on the foregoing, the following embodiments are used to further describe the technical solution of the present invention:
In the embodiment 1, the supercritical carbon dioxide power generation system D is a single reheating system, the steam power generation system C of the water working medium is a reheating-free system, and the two systems share one pi-shaped arrangement boiler, as shown in figure 1.
The boiler comprises a front flue economizer A1, a rear flue economizer A2, a front flue superheater A3, a rear flue superheater A4, a hearth inner wall superheater A5, a low-temperature reheater A7, a low-temperature superheater A6, a partition screen type superheater A8, a screen type superheater A9, a final-stage reheater A10 and a final-stage superheater A11;
The water outlets of the high-pressure heater 18 of the steam power generation system are respectively connected with the inlets of the front flue economizer A1 and the rear flue economizer A2 of the boiler, the outlets of the front flue economizer A1 and the rear flue economizer A2 are respectively connected with the inlet of the high-pressure turbine 20 of the supercritical carbon dioxide power generation system through the boiler furnace water-cooling wall, the steam outlets of the front flue superheater A3 and the rear flue superheater A4 are respectively connected with the high-pressure cylinder 13 of the steam power generation system through the furnace inner wall type superheater A5, the outlets of the low-temperature reheater A6 and the low-temperature superheater A7 are respectively connected with the final-stage reheater A10 and the partition-screen type superheater A8, the partition-screen superheater A8 is connected with the partition-type superheater A9, the partition-type superheater A9 is connected with the final-stage superheater A11, the primary gas outlet of the final-stage superheater A11 is connected with the inlet of the high-pressure turbine 20 of the supercritical carbon dioxide power generation system, the secondary gas outlet of the final-stage reheater A10 is connected with the inlet of the low-pressure turbine 21 of the supercritical carbon dioxide power generation system, and the outlet of the high-temperature reheater 25 of the supercritical carbon dioxide is connected with the secondary gas outlet of the low-pressure turbine 20 of the boiler.
For the water working medium flow, after boiler feed water is preheated by a front flue economizer A1 and a rear flue economizer A2 which are connected in parallel, undersaturated water enters a boiler water-cooled wall to be subjected to phase change and become micro superheated steam, then enters a front flue superheater A3 and a rear flue superheater A4 which are connected in parallel to be heated into superheated steam, then enters a turbine high-pressure cylinder 13 to do work after the superheat degree is further improved by a hearth inner wall superheater A5, a pumping hole is arranged in the middle of a cylinder body of the turbine high-pressure cylinder 13 to pump part of steam into a shell side of a high-pressure heater 18 to heat the feed water, and the rest of exhaust small steam flows enter a deaerator 17 to enter a turbine low-pressure cylinder 14 to do work continuously. Before leaving, part of steam entering the low-pressure cylinder 14 of the steam turbine is pumped into the shell side of the low-pressure heater 16 to heat condensed water, and the rest of steam enters the condenser 15 to be condensed into water. The condensed water is boosted by a condensed water pump 29 and then sequentially passes through the tube side of the low-pressure heater 16 and the deaerator 17, and is further boosted by a water supply pump 28 and then is heated by the tube side of the high-pressure heater 18 to return to the boiler.
For the supercritical carbon dioxide process, boiler feed gas is primarily heated by a low-temperature superheater A6, then is further heated by a partition screen type superheater A8 and a screen type superheater A9, finally is heated to the rated air temperature of a primary gas outlet in a final-stage superheater A11, primary gas outlet air flow is subjected to work by a high-pressure turbine 20, exhaust gas enters a reheating process, cold reheat gas is primarily heated by a low-temperature reheater A7, then is heated to the required rated secondary gas flow temperature by a final-stage reheater A10, enters a low-pressure turbine 21 to work, and exhaust gas of the low-pressure turbine 21 is sequentially heated by a high-temperature reheater 25 and a low-temperature reheater 26 and then is divided into two air flows. One air flow is directly boosted by the recompressor 22 and then is merged into the intermediate air supply of the two-stage heat regenerator, the other air flow enters the main compressor 24 to boost after passing through the cooler 23, and the boosted air supply is returned to the boiler after being warmed by the two-stage heat regenerator.
In the embodiment 2, the supercritical carbon dioxide power generation system D is a single reheating system, the steam power generation system C of the water working medium is a reheating-free system, and the two systems share a tower-type arrangement boiler, as shown in figure 2.
The boiler comprises a second-stage superheater B1, a final-stage reheater B2, a final-stage superheater B3, a low-temperature superheater B4, a low-temperature reheater B5, a front flue superheater B6, a rear flue superheater B7, a front flue economizer B8 and a rear flue economizer B9;
the outlet of the second-stage superheater B1 is connected with the inlet of the final-stage superheater B3, the outlet of the low-temperature superheater B4 is connected with the inlet of the second-stage superheater B1, the inlet of the final-stage superheater B2 is connected with the outlet of the low-temperature reheater B5, the outlets of the front flue superheater B6 and the rear flue superheater B7 are respectively connected with the inlet of a turbine high-pressure cylinder 13 of the steam power generation system, the water outlet of a high-pressure heater 18 of the steam power generation system is respectively connected with the inlets of a front flue economizer B8 and a rear flue economizer B9 of the boiler, the outlets of the front flue economizer B8 and the rear flue economizer B9 are connected with the cold water wall of a boiler furnace, the gas supply outlet of a high-temperature reheater 25 of supercritical carbon dioxide is connected with the inlet of a low-temperature superheater B4 of the boiler, the primary gas outlet of the final-stage superheater B3 is connected with the inlet of a high-pressure turbine 20 of the supercritical carbon dioxide power generation system, and the secondary gas outlet of the final-stage superheater B2 is connected with the inlet of a low-pressure turbine 21 of the supercritical carbon dioxide power generation system, and the secondary gas outlet of the low-pressure reheater B5 of the boiler is connected with the secondary gas inlet of the high-pressure turbine 20 of the supercritical carbon dioxide power generation system.
For the water working procedure, after boiler feed water is preheated by a front flue economizer B8 and a rear flue economizer B9 which are connected in parallel, undersaturated water enters a boiler water-cooled wall to be subjected to phase change and become slightly overheated steam, the slightly overheated steam enters the front flue superheater B6 and the rear flue superheater B7 which are connected in parallel to be heated into overheated steam to be output to a turbine high-pressure cylinder 13, a pumping hole is arranged in the middle of a cylinder body of the turbine high-pressure cylinder 13 to pump part of steam into a shell side of the high-pressure heater 18 to heat the feed water, the rest of the small exhaust steam enters a deaerator 17 to enter a majority of the turbine low-pressure cylinder 14 to continuously apply work, and the steam entering the turbine low-pressure cylinder 15 enters the shell side of the low-pressure heater 16 to heat the condensed water after leaving, and the rest enters the condenser 15 to condense into water. The condensed water is boosted by a condensed water pump 29 and then sequentially passes through the tube side of the low-pressure heater 16 and the deaerator 17, and is further boosted by a water supply pump 28 and then heated by the tube side of the high-pressure heater 18 to return to the boiler.
For the supercritical carbon dioxide process, boiler gas is primarily heated through a low-temperature superheater B4, then is further heated through a second-stage superheater B1, and finally is heated to the rated primary gas temperature in a final-stage superheater B3, primary gas outlet air flow is subjected to work through a high-pressure turbine 20, exhaust gas enters a reheating process, cold reheat gas is primarily heated through a low-temperature reheater B5, and then is heated to the required rated secondary gas parameter through a final-stage reheater B2. The secondary gas at the outlet of the boiler is heated by a high-temperature heat regenerator 25 and a low-temperature heat regenerator 26 in sequence after the low-pressure turbine 21 does work, and then is divided into two air flows. One air flow is directly boosted by the recompressor 22 and then is merged into the intermediate air supply of the two-stage heat regenerator, the other air flow enters the main compressor 24 to boost after passing through the cooler 23, and the boosted air supply is returned to the boiler after being warmed by the two-stage heat regenerator.
Theoretical research shows that the supercritical carbon dioxide Brayton power generation cycle has higher efficiency advantage than the steam Rankine cycle under the condition that the temperature of the working medium is higher than 450 ℃. The supercritical carbon dioxide and steam double-working-medium circulation power generation system established in the embodiment shares one boiler as a heat source, is suitable for the design of the double-working-medium circulation boiler, is simultaneously provided with a water working medium and a supercritical carbon dioxide heating surface, and enters respective power generation systems for power generation after the two working media are heated to rated parameters. The method can realize cascade utilization of heat generated by fuel combustion, and further improves energy utilization efficiency by utilizing respective characteristics of two cycles. The system can be newly built or can be modified from the viewpoint of saving equipment investment by utilizing equipment facilities of the existing unit, and directly saves the equipment investment of water treatment equipment and turbo generator units.
The double-station coupling power generation system provided by the embodiment takes a traditional thermal power generation core device-a boiler as a common heat source. The water working medium and the supercritical carbon dioxide heating surface are simultaneously arranged on a conventional boiler burning hydrocarbon fuel. The hearth adopts a water-cooled wall, can be directly applied to a mature steam boiler selection guide rail (adopts a conventional vertical tube ring membrane wall or a lower hearth spiral tube ring hearth vertical tube ring), and solves the difficulty in hearth selection. The boiler rear flue also adopts a steam cooling wall, so that the problem that the pressure loss and the temperature rise of the supercritical carbon dioxide serving as a wall cooling working medium greatly influence the Brayton cycle efficiency of the supercritical carbon dioxide is avoided. The supercritical carbon dioxide is selected from the screen type heating surface of the upper part of the hearth and the horizontal flue, and has the advantages of high heat transfer efficiency, low resistance and the like. The embodiment can simultaneously realize the parallel of the high-parameter steam power generation and the supercritical carbon dioxide power generation system.
The present invention has been described in terms of preferred embodiments, but is not limited to the invention, and any equivalent embodiments can be made by those skilled in the art without departing from the scope of the invention, as long as the equivalent embodiments are possible using the above-described structures and technical matters.
Claims (2)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210730181.8A CN115234333B (en) | 2022-06-24 | 2022-06-24 | A thermal power generation system with supercritical carbon dioxide and steam dual working fluid circulation |
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| CN202210730181.8A CN115234333B (en) | 2022-06-24 | 2022-06-24 | A thermal power generation system with supercritical carbon dioxide and steam dual working fluid circulation |
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| CN115234333B true CN115234333B (en) | 2024-12-27 |
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| CN115854327A (en) * | 2022-12-23 | 2023-03-28 | 天津大学 | A Coal-Fired Retrofit Boiler for Improving the Steam Parameters of a Subcritical Unit |
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| CN103591575A (en) * | 2013-11-25 | 2014-02-19 | 哈尔滨锅炉厂有限责任公司 | Supercritical circulating fluidized bed boiler of 350MW and vapor circulation method |
| CN107489998A (en) * | 2017-09-28 | 2017-12-19 | 哈尔滨锅炉厂有限责任公司 | A kind of effect that can put forward Sub-critical Parameter grade is to the boiler of ultra supercritical parameter grade |
| CN110273724A (en) * | 2019-08-05 | 2019-09-24 | 上海发电设备成套设计研究院有限责任公司 | A kind of double-work medium coal generating system and method |
| CN111219217A (en) * | 2020-03-11 | 2020-06-02 | 西安热工研究院有限公司 | A coal-based supercritical carbon dioxide power generation system and method capable of recovering waste heat |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102889570B (en) * | 2012-09-11 | 2014-11-12 | 上海锅炉厂有限公司 | Tower-type boiler with primary reheater and secondary reheater |
| CN108180470B (en) * | 2017-11-28 | 2018-10-23 | 东南大学 | The fire coal circulating fluid bed boiler of supercritical carbon dioxide and electricity generation system and electricity-generating method |
| CN110847984B (en) * | 2019-11-15 | 2021-02-09 | 西安交通大学 | Supercritical carbon dioxide circulating coal-fired power generation system integrated with low-temperature waste heat recovery and operation method |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591575A (en) * | 2013-11-25 | 2014-02-19 | 哈尔滨锅炉厂有限责任公司 | Supercritical circulating fluidized bed boiler of 350MW and vapor circulation method |
| CN107489998A (en) * | 2017-09-28 | 2017-12-19 | 哈尔滨锅炉厂有限责任公司 | A kind of effect that can put forward Sub-critical Parameter grade is to the boiler of ultra supercritical parameter grade |
| CN110273724A (en) * | 2019-08-05 | 2019-09-24 | 上海发电设备成套设计研究院有限责任公司 | A kind of double-work medium coal generating system and method |
| CN111219217A (en) * | 2020-03-11 | 2020-06-02 | 西安热工研究院有限公司 | A coal-based supercritical carbon dioxide power generation system and method capable of recovering waste heat |
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