CN106195984B - Novel coal supercritical carbon dioxide Brayton cycle single-stage shunts electricity generation system - Google Patents
Novel coal supercritical carbon dioxide Brayton cycle single-stage shunts electricity generation system Download PDFInfo
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- CN106195984B CN106195984B CN201610507083.2A CN201610507083A CN106195984B CN 106195984 B CN106195984 B CN 106195984B CN 201610507083 A CN201610507083 A CN 201610507083A CN 106195984 B CN106195984 B CN 106195984B
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- generation system
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- supercritical carbon
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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
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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
- 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
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- 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
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- 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)
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a kind of novel coal supercritical carbon dioxide Brayton cycle single-stages to shunt 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, direction in burner hearth along flue gas circulation has been sequentially arranged water-cooling wall, wall reheater and pendant superheater, high temperature reheater is disposed in horizontal flue, direction in back-end ductwork along flue gas circulation has been sequentially arranged low-temperature reheater, secondary air preheater and main air preheater, low temperature superheater is disposed in back-end ductwork, low-temperature reheater is arranged side by side with low temperature superheater, the system can reduction exhaust gas temperature, improve the thermal efficiency of boiler and the efficiency of electricity generation system.
Description
Technical field
The invention belongs to advanced efficient field of thermal power, it is related to a kind of novel coal supercritical carbon dioxide Bretton and follows
Ring single-stage shunts electricity generation system.
Background technique
The efficiency that generating set is continuously improved is the eternal theme and target of power industry research.For electricity power enterprise
Speech, the cycle efficieny of system is higher, and the energy consumption of unit generated energy is lower, and corresponding energy-output ratio and pollutant discharge amount are just
It is lower.For traditional using steam Rankine cycle as the generating set of energy conversion system, if improving generating efficiency to 50% left side
The right side then needs to improve main steam condition to 700 DEG C, this, which means that, needs to spend high economic cost and time cost to grind
Send out nickel base superalloy novel.In order to avoid the technical bottleneck in terms of material, sight is transferred to novel dynamic by scholars one after another
The power circulatory system, to realize the promotion of generating efficiency.By a large amount of early-stage study of scholars and demonstration, generally recognize at present
Can supercritical carbon dioxide Brayton cycle be great potential new concept advanced power systems.This is mainly due to overcritical
Carbon dioxide has the characteristics that energy density is big, heat transfer efficiency is high, supercritical carbon dioxide Brayton cycle efficient power generation system
The efficiency that 700 DEG C of conventional steam Rankine cycle can be reached in 620 DEG C of temperature ranges, does not need novel high temperature nickel of redeveloping
Based alloy, and equipment size is less than the steam unit of same parameter, economy is very good.
The characteristics of China's energy natural endowment, determines that coal fired power generation is still the master of China's electric structure in the following very long-term
Body, therefore, exploitation novel coal supercritical carbon dioxide Brayton cycle electricity generation system meet the fundamental realities of the country in China, tool very much
There is very wide application prospect.
Although being in the world public technology about supercritical carbon dioxide Brayton cycle generation technology, at present
It is to be directed to the new energy such as solar energy, and be directed to tradition mostly about supercritical carbon dioxide Brayton cycle electricity generation system both at home and abroad
The novel system of fossil energy, especially coal fired power generation, which rarely has, to be related to.Coal-fired supercritical carbon dioxide Brayton cycle is sent out
For electric system, due to including a large amount of heat regenerative systems, boiler inlet supercritical carbon dioxide Temperature of Working in the entire circulatory system
It generally will be more than 500 DEG C.For supercritical carbon dioxide boiler, if still according to the heating surface cloth of conventional vapor boiler
Method is set, arranges conventional economizer in boiler tail, then temperature and pressure are small, and working medium temperature rise is usually only several to take the photograph due to conducting heat at economizer
Family name's degree, so that heating surface arrangement is unreasonable, less economical.In addition, coal-fired supercritical carbon dioxide Brayton cycle electricity generation system
Since working medium entrances temperature is high, boiler tail exhaust gas temperature is also higher, therefore how to reduce the row of supercritical carbon dioxide boiler
Smoke temperature degree, improving boiler thermal efficiency is also the coal-fired vital technology ring of supercritical carbon dioxide Brayton cycle electricity generation system
Section.
Summary of the invention
It is an object of the invention to overcome the above-mentioned prior art, a kind of overcritical titanium dioxide of novel coal is provided
Carbon Brayton cycle single-stage shunt electricity generation system, the system can reduction exhaust gas temperature, improve boiler the thermal efficiency and
The efficiency of electricity generation system.
In order to achieve the above objectives, novel coal supercritical carbon dioxide Brayton cycle single-stage of the present invention shunts hair
Electric 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, the interior direction along flue gas circulation of burner hearth have been sequentially arranged water-cooling wall, wall reheater and screen formula overheat
Device, is disposed with high temperature reheater in horizontal flue, in back-end ductwork along the direction of flue gas circulation be sequentially arranged low-temperature reheater,
Secondary air preheater and main air preheater are disposed with low temperature superheater, low-temperature reheater and low temperature mistake in back-end ductwork
Hot device is arranged side by side；
The hot side outlet of cryogenic regenerator is divided into two-way in supercritical carbon dioxide Brayton cycle electricity generation system, wherein one
Road is connected with the entrance of forecooler in supercritical carbon dioxide Brayton cycle electricity generation system, another way and overcritical titanium dioxide
The entrance that machine is recompressed 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, the outlet of low temperature superheater and entering for pendant superheater
Mouth is connected, the outlet of pendant superheater and the entrance of the high pressure turbine in supercritical carbon dioxide Brayton cycle electricity generation system
It is connected；
The outlet and the entrance phase of wall reheater of supercritical carbon dioxide Brayton cycle electricity generation system mesohigh turbine
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 with
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, secondary air preheating
The air outlet slit of device is connected with the air intake of boiler.
Supercritical carbon dioxide Brayton cycle electricity generation system includes forecooler, main compressor, recompression machine, low temperature backheat
Device, high temperature regenerator, boiler, high pressure turbine, low pressure turbine and generator；
The hot side outlet of cryogenic regenerator is divided into two-way, wherein pre-cooled device is connected with the entrance of main compressor all the way,
The outlet of main compressor is connected with the cold side input port of cryogenic regenerator, and another way is connected with the entrance of recompression machine, then presses
The outlet of contracting machine is connected with the cold side outlet port of cryogenic regenerator by the cold side input port of pipeline and Guan Houyu high temperature 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 generator.
It there also is provided SCR denitration device in back-end ductwork, SCR denitration device is located at secondary air preheater and main air
Between preheater.
The invention has the following advantages:
Novel coal supercritical carbon dioxide Brayton cycle single-stage of the present invention shunts the boiler tail of electricity generation system
Main air preheater and secondary air preheater are disposed in portion's flue, flue-gas temperature is reduced to by secondary air preheater
350~400 DEG C of the preference temperature section of SCR denitration reaction, the flue gas after cooling enter SCR denitration device and carry out denitration reaction,
Flue gas after completing denitration process enters back into main air preheater to exchange heat with air, and exhaust gas temperature is reduced to
Certain level, on the one hand effectively on the other hand low exhaust gas temperature, raising boiler thermal efficiency can heat boiler auxiliary combustion air
To 500 DEG C or more, the temperature of combustion air is improved, conducive to the kindling and burning of coal dust, while being conducive in boiler-burner region
High temperature strong reducing property atmosphere is created, so that the generation of nitrogen oxides be greatly reduced, and then improves the generating efficiency of boiler.
In addition, the hot side outlet of cryogenic regenerator is connected with forecooler and recompression machine import respectively, so that entire cycle generating system
It is simplified.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Wherein, 1 it is forecooler, 2 be main compressor, 3 be recompression machine, 4 be cryogenic regenerator, 5 is high temperature regenerator, 6
It is high pressure turbine for boiler, 7,8 be low pressure turbine, 9 be generator, 61 be water-cooling wall, 62 be wall reheater, 63 is 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 be SCR
Denitrification apparatus, 69 are main air preheater.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing:
With reference to Fig. 1, novel coal supercritical carbon dioxide Brayton cycle single-stage of the present invention shunts 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, the interior direction along flue gas circulation of burner hearth have been sequentially arranged water-cooling wall 61, wall reheater 62 and screen formula overheat
Device 63, is disposed with high temperature reheater 64 in horizontal flue, has been sequentially arranged low temperature again along the direction of flue gas circulation in back-end ductwork
Hot device 65, secondary air preheater 67 and main air preheater 69 are disposed with low temperature superheater 66 in back-end ductwork, and 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 the entrance phase with forecooler 1 in supercritical carbon dioxide Brayton cycle electricity generation system all the way
Connection, another way are connected with the entrance for recompressing machine 3 in supercritical carbon dioxide Brayton cycle electricity generation system, and overcritical two
The cold side outlet port of carbonoxide Brayton cycle electricity generation system high temperature regenerator 5 is connected with the entrance of water-cooling wall 61；Water-cooling wall
61 outlet 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
It is logical, the outlet and the entrance phase of the high pressure turbine 7 in supercritical carbon dioxide Brayton cycle electricity generation system of pendant superheater 63
Connection；The outlet and the entrance phase of wall reheater 62 of supercritical carbon dioxide Brayton cycle electricity generation system mesohigh turbine 7
Connection, the outlet of wall reheater 62 is connected with the entrance of low-temperature reheater 65, the outlet of low-temperature reheater 65 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 and boiler of secondary air preheater 67
6 air intake is connected.
Supercritical carbon dioxide Brayton cycle electricity generation system includes forecooler 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 generator 9；The hot side outlet of cryogenic regenerator 4
It is divided into two-way, wherein pre-cooled device 1 is connected with the entrance of main compressor 2 all the way, the outlet of main compressor 2 and cryogenic regenerator
4 cold side input port is connected, and another way is connected with the entrance of recompression machine 3, recompresses outlet and the cryogenic regenerator 4 of machine 3
Cold side outlet port is by pipeline and the cold side input port of Guan Houyu high temperature regenerator 5 is connected, the outlet of low pressure turbine 8 and high temperature return
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 generator 9；It there also is provided SCR denitration device 68, SCR denitration in back-end ductwork
Device 68 is between secondary air preheater 67 and main air preheater 69.
Specific works engineering of the invention are as follows:
The lack of gas that 4 hot side of cryogenic regenerator comes out are divided into two parts, and a part is by entering back into master after cooling in forecooler 1
Compressor 2 boosts, and the cold side for then entering back into cryogenic regenerator 4 carries out pre-heating temperature elevation, and another part directly passes through recompression machine 3
Enter in 5 cold side of high temperature regenerator after being converged after boosting with the cold side outlet port working medium of cryogenic regenerator 4, high temperature regenerator 5
The working medium of cold side output enters in water-cooling wall 61, then successively water cooled wall 61, low temperature superheater 66 and pendant superheater again
63；Pendant superheater 6 flows out working medium and enters 7 expansion work of high pressure turbine, and the exhaust after acting is successively through wall reheater 62, low
Enter low pressure turbine 8 after warm reheater 65 and high temperature reheater 64 to do work, the lack of gas of low pressure turbine 8 are followed by high temperature regenerator
4 hot side of 5 hot sides and cryogenic regenerator, for heating the Biological process after being boosted by recompression machine 3.
In order to further decrease 6 exhaust gas temperature of boiler, 6 thermal efficiency of boiler is improved, the present invention is disposed in back-end ductwork
Main air preheater 69 and secondary air preheater 67, wherein the smoke temperature drop of flue gas after the heat exchange of secondary air preheater 67
As low as the preference temperature section of SCR denitration reaction, i.e., 350 DEG C~400 DEG C, the flue gas after then cooling down enters SCR denitration device
68 carry out denitration process, and the flue gas after denitration process enters in main air preheater 69 to the air entered in boiler 6
It is heated, the temperature of air after heating is made to meet hearth combustion and thermal transmission requirement.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not limited to this hair the foregoing is merely a specific embodiment of the invention
Bright, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention
Protection scope within.
Claims (1)
1. a kind of novel coal supercritical carbon dioxide Brayton cycle single-stage shunts electricity generation system, which is characterized in that including pot
Furnace (6) and supercritical carbon dioxide Brayton cycle electricity generation system ontology, boiler (6) include being sequentially connected logical burner hearth, level
Flue and back-end ductwork, the interior direction along flue gas circulation of burner hearth have been sequentially arranged water-cooling wall (61), wall reheater (62) and screen
Formula superheater (63) is disposed with high temperature reheater (64) in horizontal flue, along the direction of flue gas circulation successively cloth in back-end ductwork
It is equipped with low-temperature reheater (65), secondary air preheater (67) and main air preheater (69), is disposed in back-end ductwork low
Warm superheater (66), low-temperature reheater (65) are arranged side by side with low temperature superheater (66)；
The cold side outlet port of supercritical carbon dioxide Brayton cycle electricity generation system ontology high temperature regenerator (5) and water-cooling wall (61)
Entrance be connected；
The outlet of water-cooling wall (61) is connected with the entrance of low temperature superheater (66), the outlet and screen formula mistake of low temperature superheater (66)
The entrance of hot device (63) is connected, the outlet and supercritical carbon dioxide Brayton cycle electricity generation system sheet of pendant superheater (63)
The entrance of high pressure turbine (7) in body is connected；
The outlet of supercritical carbon dioxide Brayton cycle electricity generation system ontology mesohigh turbine (7) and wall reheater (62)
Entrance is connected, and the outlet of wall reheater (62) is connected with the entrance of low-temperature reheater (65), low-temperature reheater (65)
Outlet is connected through high temperature reheater (64) with the low pressure turbine (8) in supercritical carbon dioxide Brayton cycle electricity generation system ontology
It is logical；
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)；
Supercritical carbon dioxide Brayton cycle electricity generation system ontology includes forecooler (1), main compressor (2), recompression machine
(3), cryogenic regenerator (4), high temperature regenerator (5), high pressure turbine (7), low pressure turbine (8) and generator (9)；
The hot side outlet of cryogenic regenerator (4) is divided into two-way, wherein the entrance phase of pre-cooled device (1) and main compressor (2) all the way
Connection, the outlet of main compressor (2) are connected with the cold side input port of cryogenic regenerator (4), and another way enters with recompression machine (3)
Mouth is connected, and the cold side outlet port of the outlet and cryogenic regenerator (4) that recompress machine (3) passes through pipeline and 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 generator (9)
Drive shaft be connected；
There also is provided in back-end ductwork SCR denitration device (68), SCR denitration device (68) be located at secondary air preheater (67) with
Between main air preheater (69).
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| CN201610507083.2A CN106195984B (en) | 2016-06-30 | 2016-06-30 | Novel coal supercritical carbon dioxide Brayton cycle single-stage shunts electricity generation system |
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| CN201610507083.2A CN106195984B (en) | 2016-06-30 | 2016-06-30 | Novel coal supercritical carbon dioxide Brayton cycle single-stage shunts electricity generation system |
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| CN106195984B true CN106195984B (en) | 2019-03-12 |
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| 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 |
| 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 |
| 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 |
| 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 |
| CN111810260B (en) * | 2020-06-30 | 2021-10-22 | 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 |
| 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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| JP2000154733A (en) * | 1998-11-19 | 2000-06-06 | Mitsubishi Heavy Ind Ltd | Closed brayton cycle gas turbine device |
| CN104728823B (en) * | 2015-03-17 | 2016-08-03 | 西安热工研究院有限公司 | A kind of Novel supercritical carbon dioxide coal-burning boiler |
| 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 |
| CN105526576B (en) * | 2016-01-20 | 2017-11-17 | 西安热工研究院有限公司 | A kind of coal base supercritical carbon dioxide Brayton cycle double split flow efficient power generation system |
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