CN106195984A - Novel coal supercritical carbon dioxide Brayton cycle single-stage shunting electricity generation system - Google Patents
Novel coal supercritical carbon dioxide Brayton cycle single-stage shunting electricity generation system Download PDFInfo
- Publication number
- CN106195984A CN106195984A CN201610507083.2A CN201610507083A CN106195984A CN 106195984 A CN106195984 A CN 106195984A CN 201610507083 A CN201610507083 A CN 201610507083A CN 106195984 A CN106195984 A CN 106195984A
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- China
- Prior art keywords
- carbon dioxide
- generation system
- electricity generation
- supercritical carbon
- brayton cycle
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
-
- 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
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/10—Nitrogen; Compounds thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/10—Nitrogen; Compounds thereof
- F23J2215/101—Nitrous oxide (N2O)
Abstract
The invention discloses a kind of novel coal supercritical carbon dioxide Brayton cycle single-stage shunting electricity generation system, including boiler and supercritical carbon dioxide Brayton cycle electricity generation system, boiler includes being sequentially connected logical burner hearth, horizontal flue and back-end ductwork, in burner hearth, the direction along flue gas circulation has been sequentially arranged water-cooling wall, wall reheater and pendant superheater, high temperature reheater it is disposed with in horizontal flue, in back-end ductwork, the direction along flue gas circulation has been sequentially arranged low-temperature reheater, secondary air preheater and main air preheater, low temperature superheater it is disposed with in back-end ductwork, low-temperature reheater is arranged side by side with low temperature superheater, this system can reduction exhaust gas temperature, improve the thermal efficiency and the efficiency of electricity generation system of boiler.
Description
Technical field
The invention belongs to advanced efficiently field of thermal power, relate to a kind of novel coal supercritical carbon dioxide Bretton and follow
Ring single-stage shunting electricity generation system.
Background technology
The efficiency improving constantly generating set is eternal theme and the target of power industry research.For electricity power enterprise
Speech, the cycle efficieny of system is the highest, and the energy consumption of unit generated energy is the lowest, and corresponding energy-output ratio and pollutant discharge amount are just
The lowest.For traditional generating set with steam Rankine cycle as energy conversion system, if it is left to 50% to improve generating efficiency
The right side, then need to improve to 700 DEG C main steam condition, and this means that needs to spend high economic cost and time cost to grind
Send out New Nickel based high-temperature alloy.In order to avoid the technical bottleneck in terms of material, sight is transferred to Novel movable by scholars one after another
Power blood circulation, to realizing the lifting of generating efficiency.Through the substantial amounts of early-stage Study of scholars and demonstration, the most generally recognize
Can supercritical carbon dioxide Brayton cycle be the new ideas advanced power systems of great potential.This is mainly due to supercritical
Carbon dioxide has that energy density is big, heat transfer efficiency high, supercritical carbon dioxide Brayton cycle efficient power generation system
The efficiency of conventional steam Rankine cycle 700 DEG C can be reached, it is not necessary to novel high temperature nickel of redeveloping in 620 DEG C of temperature ranges
Base alloy, and equipment size is less than the steam unit of same parameter, economy is the best.
The feature of China's energy natural endowment determines coal fired power generation and remains the master of following interior China electric structure
Body, therefore, exploitation novel coal supercritical carbon dioxide Brayton cycle electricity generation system meets the fundamental realities of the country of China, tool very much
There is the most wide application prospect.
Although be public technology about supercritical carbon dioxide Brayton cycle generation technology in the world, but at present
Domestic and international is for new forms of energy such as solar energys about supercritical carbon dioxide Brayton cycle electricity generation system mostly, and for tradition
The novel system of fossil energy, particularly coal fired power generation rarely has and relates to.Coal-fired supercritical carbon dioxide Brayton cycle is sent out
From the point of view of electricity system, owing to whole blood circulation includes a large amount of heat regenerative system, boiler inlet supercritical carbon dioxide Temperature of Working
Typically will be more than 500 DEG C.From the point of view of supercritical carbon dioxide boiler, if still according to the heating surface cloth of conventional vapor boiler
Put method, arrange conventional economizer at boiler tail, then little due to the temperature and pressure that conduct heat at economizer, working medium temperature rise generally only has several taking the photograph
Family name's degree so that heating surface is arranged unreasonable, less economical.Additionally, coal-fired supercritical carbon dioxide Brayton cycle electricity generation system
Owing to working medium inlet temperature is high, boiler tail exhaust gas temperature is the highest, the most how to reduce the row of supercritical carbon dioxide boiler
Cigarette temperature, improving boiler thermal output is also the coal-fired supercritical carbon dioxide vital technology ring of Brayton cycle electricity generation system
Joint.
Summary of the invention
It is an object of the invention to the shortcoming overcoming above-mentioned prior art, it is provided that a kind of novel coal supercritical titanium dioxide
Carbon Brayton cycle single-stage shunting electricity generation system, this system can reduction exhaust gas temperature, improve boiler the thermal efficiency and
The efficiency of electricity generation system.
For reaching above-mentioned purpose, novel coal supercritical carbon dioxide Brayton cycle single-stage of the present invention shunting is sent out
Electricity system includes boiler and supercritical carbon dioxide Brayton cycle electricity generation system, and boiler includes being sequentially connected logical burner hearth, water
Flat flue and back-end ductwork, it is overheated that the direction circulated along flue gas in burner hearth has been sequentially arranged water-cooling wall, wall reheater and screen formula
Device, is disposed with high temperature reheater in horizontal flue, in back-end ductwork direction along flue gas circulation be sequentially arranged low-temperature reheater,
Secondary air preheater and main air preheater, be disposed with low temperature superheater, low-temperature reheater and low temperature mistake in back-end ductwork
Hot device is arranged side by side;
In supercritical carbon dioxide Brayton cycle electricity generation system, the hot side outlet of cryogenic regenerator is divided into two-way, Qi Zhongyi
Road is connected with the entrance of precooler in supercritical carbon dioxide Brayton cycle electricity generation system, another road and supercritical titanium dioxide
The entrance recompressing machine in carbon Bretton cycle generating system is connected, in supercritical carbon dioxide Brayton cycle electricity generation system
The cold side outlet port of high temperature regenerator is connected with the entrance of water-cooling wall;
The outlet of water-cooling wall is connected with the entrance of low temperature superheater, and the outlet of low temperature superheater enters with pendant superheater
Mouth is connected, the entrance of the high pressure turbine in the outlet of pendant superheater and supercritical carbon dioxide Brayton cycle electricity generation system
It is connected;
The outlet of supercritical carbon dioxide Brayton cycle electricity generation system mesohigh turbine and the entrance phase of wall reheater
Connection, the outlet of wall reheater is connected with the entrance of low-temperature reheater, the outlet of low-temperature reheater through high temperature reheater and
Low pressure turbine in supercritical carbon dioxide Brayton cycle electricity generation system is connected;
The air outlet slit of main air preheater is connected with the air intake of secondary air preheater, and secondary air preheats
The air outlet slit of device is connected with the air intake of boiler.
Supercritical carbon dioxide Brayton cycle electricity generation system includes precooler, main compressor, recompression machine, low temperature backheat
Device, high temperature regenerator, boiler, high pressure turbine, low pressure turbine and electromotor;
The hot side outlet of cryogenic regenerator is divided into two-way, and wherein a pre-cooled device in road is connected with the entrance of main compressor,
The outlet of main compressor is connected with the cold side input port of cryogenic regenerator, and another road is connected with the entrance of recompression machine, then presses
The outlet of contracting machine is connected by the cold side input port of pipeline Guan Houyu high temperature regenerator with the cold side outlet port of cryogenic regenerator, low
The outlet of pressure turbine is connected with the hot side entrance of high temperature regenerator, the hot side outlet of high temperature regenerator and the heat of cryogenic regenerator
Side entrance is connected, and the output shaft of low pressure turbine is connected with the drive shaft of electromotor.
There also is provided SCR denitration device in back-end ductwork, SCR denitration device is positioned at secondary air preheater and main air
Between preheater.
The method have the advantages that
The boiler tail of novel coal supercritical carbon dioxide Brayton cycle single-stage of the present invention shunting electricity generation system
Being disposed with main air preheater and secondary air preheater in portion's flue, flue-gas temperature is reduced to by secondary air preheater
Interval 350~400 DEG C of the preference temperature of SCR denitration reaction, the flue gas after cooling enters SCR denitration device and carries out denitration reaction,
Complete the flue gas after denitration processes to enter back in main air preheater and carry out heat exchange with air, exhaust gas temperature is reduced to
Certain level, the most effective low exhaust gas temperature, improves boiler thermal output, on the other hand can be heated by boiler auxiliary combustion air
To more than 500 DEG C, improve catching fire and burning of the temperature of combustion air, beneficially coal dust, be beneficial in boiler-burner region simultaneously
Create high temperature strong reducing property atmosphere, thus the generation of nitrogen oxides is greatly reduced, and then improve the generating efficiency of boiler.
It addition, the hot side outlet of cryogenic regenerator is connected with precooler and recompression machine import respectively so that whole cycle generating system
It is simplified.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Wherein, 1 for precooler, 2 be main compressor, 3 for recompression machine, 4 for cryogenic regenerator, 5 be high temperature regenerator, 6
For boiler, 7 be high pressure turbine, 8 be low pressure turbine, 9 be electromotor, 61 be water-cooling wall, 62 be wall reheater, 63 for screen formula mistake
Hot device, 64 be high temperature reheater, 65 be low-temperature reheater, 66 be low temperature superheater, 67 be secondary air preheater, 68 for SCR
Denitrification apparatus, 69 it is main air preheater.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is described in further detail:
With reference to Fig. 1, novel coal supercritical carbon dioxide Brayton cycle single-stage of the present invention shunting electricity generation system
Including boiler 6 and supercritical carbon dioxide Brayton cycle electricity generation system, boiler 6 includes being sequentially connected logical burner hearth, horizontal cigarette
Road and back-end ductwork, it is overheated that the direction circulated along flue gas in burner hearth has been sequentially arranged water-cooling wall 61, wall reheater 62 and screen formula
Device 63, is disposed with high temperature reheater 64 in horizontal flue, in back-end ductwork, the direction along flue gas circulation has been sequentially arranged low temperature again
Hot device 65, secondary air preheater 67 and main air preheater 69, be disposed with low temperature superheater 66 in back-end ductwork, low temperature is again
Hot device 65 is arranged side by side with low temperature superheater 66;Cryogenic regenerator 4 in supercritical carbon dioxide Brayton cycle electricity generation system
Hot side outlet is divided into two-way, wherein a road and the entrance phase of precooler 1 in supercritical carbon dioxide Brayton cycle electricity generation system
Connection, another road is connected with the entrance recompressing machine 3 in supercritical carbon dioxide Brayton cycle electricity generation system, supercritical two
In carbonoxide Brayton cycle electricity generation system, the cold side outlet port of high temperature regenerator 5 is connected with the entrance of water-cooling wall 61;Water-cooling wall
The outlet of 61 is connected with the entrance of low temperature superheater 66, and the outlet of low temperature superheater 66 is connected with the entrance of pendant superheater 63
Logical, the entrance phase of the outlet of pendant superheater 63 and the high pressure turbine 7 in supercritical carbon dioxide Brayton cycle electricity generation system
Connection;The outlet of supercritical carbon dioxide Brayton cycle electricity generation system mesohigh turbine 7 and the entrance phase of wall reheater 62
Connection, the outlet of wall reheater 62 is connected with the entrance of low-temperature reheater 65, and the outlet of low-temperature reheater 65 is through high temperature again
Hot device 64 is connected with the low pressure turbine 8 in supercritical carbon dioxide Brayton cycle electricity generation system;Main air preheater 69
Air outlet slit be connected with the air intake of secondary air preheater 67, the air outlet slit of secondary air preheater 67 and boiler
The air intake of 6 is connected.
Supercritical carbon dioxide Brayton cycle electricity generation system includes precooler 1, main compressor 2, recompression machine 3, low temperature
Regenerator 4, high temperature regenerator 5, boiler 6, high pressure turbine 7, low pressure turbine 8 and electromotor 9;The hot side outlet of cryogenic regenerator 4
Being divided into two-way, wherein a pre-cooled device in road 1 is connected with the entrance of main compressor 2, the outlet of main compressor 2 and cryogenic regenerator
The cold side input port of 4 is connected, and another road is connected with the entrance of recompression machine 3, the outlet of recompression machine 3 and cryogenic regenerator 4
Cold side outlet port be connected by the cold side input port of pipeline Guan Houyu high temperature regenerator 5, the outlet of low pressure turbine 8 is returned with high temperature
The hot side entrance of hot device 5 is connected, and the hot side outlet of high temperature regenerator 5 is connected with the hot side entrance of cryogenic regenerator 4, low pressure
The output shaft of turbine 8 is connected with the drive shaft of electromotor 9;SCR denitration device 68, SCR denitration is there also is provided in back-end ductwork
Device 68 is between secondary air preheater 67 and main air preheater 69.
The specific works engineering of the present invention is:
The hot side of cryogenic regenerator 4 weary edema caused by disorder of QI out is two parts, and a part is by entering back into master after cooling in precooler 1
Compressor 2 boosts, and the cold side then entering back into cryogenic regenerator 4 carries out pre-heating temperature elevation, and another part is directly by recompression machine 3
Enter after after boosting, cold side outlet port working medium with cryogenic regenerator 4 is confluxed in the cold side of high temperature regenerator 5, high temperature regenerator 5
The working medium of cold side output enters in water-cooling wall 61, the most water cooled wall 61, low temperature superheater 66 and pendant superheater
63;Pendant superheater 6 flows out working medium and enters high pressure turbine 7 expansion work, and the aerofluxus after acting is successively through wall reheater 62, low
Entering low pressure turbine 8 after temperature reheater 65 and high temperature reheater 64 to do work, the weary gas of low pressure turbine 8 flows through high temperature regenerator successively
5 hot sides and the hot side of cryogenic regenerator 4, be used for heating the Biological process after being boosted by recompression machine 3.
In order to reduce boiler 6 exhaust gas temperature further, improving boiler 6 thermal efficiency, the present invention is disposed with in back-end ductwork
Main air preheater 69 and secondary air preheater 67, wherein, the cigarette temperature drop of flue gas after secondary air preheater 67 heat exchange
The low preference temperature to SCR denitration reaction is interval, and i.e. 350 DEG C~400 DEG C, then the flue gas after cooling enters SCR denitration device
68 carry out denitration process, and the flue gas after denitration processes enters in main air preheater 69 air entered in boiler 6
Heating, after making heating, the temperature of air meets hearth combustion and thermal transmission requirement.
Above-described detailed description of the invention, has been carried out the purpose of the present invention, technical scheme and beneficial effect further
Describe in detail, be it should be understood that the detailed description of the invention that the foregoing is only the present invention, be not limited to this
Bright, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, should be included in the present invention
Protection domain within.
Claims (3)
1. a novel coal supercritical carbon dioxide Brayton cycle single-stage shunting electricity generation system, it is characterised in that include pot
Stove (6) and supercritical carbon dioxide Brayton cycle electricity generation system, boiler (6) includes being sequentially connected logical burner hearth, horizontal flue
And the direction circulated along flue gas in back-end ductwork, burner hearth has been sequentially arranged water-cooling wall (61), wall reheater (62) and screen formula mistake
Hot device (63), is disposed with high temperature reheater (64) in horizontal flue, in back-end ductwork, the direction along flue gas circulation has been sequentially arranged
Low-temperature reheater (65), secondary air preheater (67) and main air preheater (69), be disposed with low temperature mistake in back-end ductwork
Hot device (66), low-temperature reheater (65) is arranged side by side with low temperature superheater (66) (66);
In supercritical carbon dioxide Brayton cycle electricity generation system, the hot side outlet of cryogenic regenerator (4) is divided into two-way, Qi Zhongyi
Road is connected with the entrance of precooler (1) in supercritical carbon dioxide Brayton cycle electricity generation system, another road and supercritical two
The entrance recompressing machine (3) in carbonoxide Brayton cycle electricity generation system is connected, and supercritical carbon dioxide Brayton cycle is sent out
In electricity system, the cold side outlet port of high temperature regenerator (5) is connected with the entrance of water-cooling wall (61);
The outlet of water-cooling wall (61) is connected with the entrance of low temperature superheater (66), the outlet of low temperature superheater (66) and screen formula mistake
The entrance of hot device (63) is connected, in the outlet of pendant superheater (63) and supercritical carbon dioxide Brayton cycle electricity generation system
The entrance of high pressure turbine (7) be connected;
The outlet of supercritical carbon dioxide Brayton cycle electricity generation system mesohigh turbine (7) and the entrance of wall reheater (62)
Being connected, the outlet of wall reheater (62) is connected with the entrance of low-temperature reheater (65), the outlet of low-temperature reheater (65)
It is connected with the low pressure turbine (8) in supercritical carbon dioxide Brayton cycle electricity generation system through high temperature reheater (64);
The air outlet slit of main air preheater (69) is connected with the air intake of secondary air preheater (67), secondary air
The air outlet slit of preheater (67) is connected with the air intake of boiler (6).
Novel coal supercritical carbon dioxide Brayton cycle electricity generation system the most according to claim 1, it is characterised in that
Supercritical carbon dioxide Brayton cycle electricity generation system includes that precooler (1), main compressor (2), recompression machine (3), low temperature return
Hot device (4), high temperature regenerator (5), boiler (6), high pressure turbine (7), low pressure turbine (8) and electromotor (9);
The hot side outlet of cryogenic regenerator (4) is divided into two-way, wherein the entrance phase of the pre-cooled device in a road (1) and main compressor (2)
Connection, the outlet of main compressor (2) is connected with the cold side input port of cryogenic regenerator (4), and another road enters with recompression machine (3)
Mouth is connected, and the outlet of recompression machine (3) and the cold side outlet port of cryogenic regenerator (4) are by pipeline Guan Houyu high temperature regenerator
(5) cold side input port is connected, and the outlet of low pressure turbine (8) is connected with the hot side entrance of high temperature regenerator (5), high temperature backheat
The hot side outlet of device (5) is connected with the hot side entrance of cryogenic regenerator (4), the output shaft of low pressure turbine (8) and electromotor (9)
Drive shaft be connected.
Novel coal supercritical carbon dioxide Brayton cycle electricity generation system the most according to claim 1, it is characterised in that
There also is provided SCR denitration device (68) in back-end ductwork, SCR denitration device (68) is positioned at secondary air preheater (67) and one-level
Between air preheater (69).
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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CN107420931A (en) * | 2017-08-25 | 2017-12-01 | 西安热工研究院有限公司 | Coal-fired supercritical carbon dioxide generating flue gas can be with working medium energy sub-prime classified utilization method and system |
CN108613170A (en) * | 2018-03-14 | 2018-10-02 | 西安交通大学 | A kind of supercritical carbon dioxide coal generating system and operation method |
CN110080848A (en) * | 2019-05-08 | 2019-08-02 | 上海发电设备成套设计研究院有限责任公司 | A kind of supercritical carbon dioxide coal circulation burning electricity generation system |
CN110230523A (en) * | 2019-07-01 | 2019-09-13 | 西安热工研究院有限公司 | A kind of supercritical CO 2 electricity generation system and method coupling sea water desalination |
CN111810260A (en) * | 2020-06-30 | 2020-10-23 | 上海发电设备成套设计研究院有限责任公司 | Supercritical carbon dioxide split-flow recompression cycle power generation system |
CN114592971A (en) * | 2022-03-30 | 2022-06-07 | 西安热工研究院有限公司 | Biomass micro gas turbine and supercritical carbon dioxide coupling power generation system and method |
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CN104832229A (en) * | 2015-04-29 | 2015-08-12 | 南京瑞柯徕姆环保科技有限公司 | Britten-organic Rankine type solar thermal power generation method and device |
CN105526576A (en) * | 2016-01-20 | 2016-04-27 | 西安热工研究院有限公司 | Coal-based supercritical carbon dioxide Brayton cycle double-split-flow efficient power generation system |
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CN107420931A (en) * | 2017-08-25 | 2017-12-01 | 西安热工研究院有限公司 | Coal-fired supercritical carbon dioxide generating flue gas can be with working medium energy sub-prime classified utilization method and system |
CN107420931B (en) * | 2017-08-25 | 2023-04-25 | 西安热工研究院有限公司 | Method and system for quality-classified and stage-classified utilization of flue gas energy and working medium energy generated by coal-fired supercritical carbon dioxide power generation |
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CN110080848A (en) * | 2019-05-08 | 2019-08-02 | 上海发电设备成套设计研究院有限责任公司 | A kind of supercritical carbon dioxide coal circulation burning electricity generation system |
CN110080848B (en) * | 2019-05-08 | 2024-02-02 | 上海发电设备成套设计研究院有限责任公司 | Supercritical carbon dioxide circulating coal-fired power generation system |
CN110230523A (en) * | 2019-07-01 | 2019-09-13 | 西安热工研究院有限公司 | A kind of supercritical CO 2 electricity generation system and method coupling sea water desalination |
CN110230523B (en) * | 2019-07-01 | 2023-10-17 | 西安热工研究院有限公司 | Supercritical CO2 power generation system and method for coupling seawater desalination |
CN111810260A (en) * | 2020-06-30 | 2020-10-23 | 上海发电设备成套设计研究院有限责任公司 | Supercritical carbon dioxide split-flow recompression cycle power generation system |
CN114592971A (en) * | 2022-03-30 | 2022-06-07 | 西安热工研究院有限公司 | Biomass micro gas turbine and supercritical carbon dioxide coupling power generation system and method |
CN114592971B (en) * | 2022-03-30 | 2024-01-19 | 西安热工研究院有限公司 | Biomass micro-combustion engine and supercritical carbon dioxide coupling power generation system and method |
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