CN206016878U - A kind of coal base supercritical carbon dioxide electricity generation system containing solar energy preheating - Google Patents
A kind of coal base supercritical carbon dioxide electricity generation system containing solar energy preheating Download PDFInfo
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- CN206016878U CN206016878U CN201621057345.1U CN201621057345U CN206016878U CN 206016878 U CN206016878 U CN 206016878U CN 201621057345 U CN201621057345 U CN 201621057345U CN 206016878 U CN206016878 U CN 206016878U
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Abstract
The utility model discloses a kind of coal base supercritical carbon dioxide electricity generation system containing solar energy preheating, including boiler, turbine, main compressor, recompression machine, generator, forecooler, cryogenic regenerator, high temperature regenerator and the middle temperature preheater of solar energy；The outlet of turbine is divided into two-way after the hot side of high temperature regenerator and the hot side of cryogenic regenerator, wherein pre-cooled device and main compressor are connected with the cold side input port of cryogenic regenerator successively all the way, another road is divided into two-way after recompression machine, wherein it is connected with the entrance of the middle temperature preheater of solar energy all the way, another road is connected by the cold side input port of pipeline Guan Houyu high temperature regenerators with the cold side outlet port of cryogenic regenerator, the cold side outlet port of high temperature regenerator is connected by the working medium entrances of pipeline Guan Houyu boilers with the outlet of the middle temperature preheater of solar energy, the outlet of boiler is connected with the entrance of turbine, the system can solve the problem that the cold and hot side working medium heat exchange of high temperature regenerator being capable of unmatched problem.
Description
Technical field
The utility model belongs to the efficient field of thermal power of supercritical carbon dioxide, is related to a kind of coal containing solar energy preheating
Base supercritical carbon dioxide electricity generation system.
Background technology
The height of generating set efficiency suffers from material impact, China's energy storage to the development and environmental protection of national economy
Standby composition feature determines that Thermal generation unit remains the main force of China's power industry in coming few decades, therefore, carries
The efficiency of high Thermal generation unit is particularly important in China.At present, supercritical carbon dioxide Brayton Cycle system is general
All over the new ideas advanced power systems for being considered great potential, this has energy density mainly due to supercritical carbon dioxide
Greatly, the features such as heat transfer efficiency is high, supercritical carbon dioxide Brayton cycle efficient power generation system can be in 620 DEG C of temperature ranges
Reach the efficiency of 700 DEG C of conventional steam Rankine cycle, it is not necessary to new high temperature alloy of redeveloping, and equipment size is less than with ginseng
Several steam units, economy are very good.Supercritical carbon dioxide Brayton Cycle system can be not only used for photo-thermal, nuclear energy,
Coal fired power generation direction can also be used in well, have good development prospect in China.
At present, the supercritical carbon dioxide Brayton Cycle system of main flow is the supercritical carbon dioxide containing shunting recompression
Brayton Cycle system.In this layout pattern, the working medium entered before forecooler is shunted by system, and a part of working medium is passed through
Forecooler cooling is laggard to become owner of compressor compresses, and another part is directly entered the compression of recompression machine then not to environment heat release.Logical
Crossing shunting recompression had both reduced thermal discharge of the system to environment, achieved cryogenic regenerator cold side and hot side working medium heat-energy transducer again
The coupling of power, improves the heat exchange effect of cryogenic regenerator, significantly improves the cycle efficieny of system on the whole.
But, containing shunting recompression supercritical carbon dioxide Brayton Cycle system in, high temperature regenerator cold side and
The matching problem of hot side working medium exchange capability of heat is not still solved.So that main gas parameter is 600 DEG C of system as an example, it is computed sending out
Existing, the high-pressure working medium heat absorption capacity of high temperature regenerator cold side is better than the emission capacity of hot side low pressure working fluid, when Average heat transfer temperature
When difference is 10 DEG C or so, cold side working medium exchange capability of heat is stronger than hot side working medium exchange capability of heat by 10% or so.If can take measures,
Realize the Optimized Matching of high temperature regenerator cold side and hot side working medium heat exchange amount, improve the heat exchange effect of high temperature regenerator, then can be with
Boiler inlet temperature is improved, reduces boiler oil consumption, save operating cost.
But understand, at present both at home and abroad in open achievement and patent, rarely have and be related to solve containing shunting recompression through investigation
The measure of the hot and cold side working medium exchange capability of heat matching problem of supercritical carbon dioxide Brayton cycle high temperature regenerator or method.
Utility model content
The purpose of this utility model is the shortcoming for overcoming above-mentioned prior art, there is provided a kind of coal containing solar energy preheating
Base supercritical carbon dioxide electricity generation system, the system effectively can solve high in supercritical carbon dioxide Brayton Cycle system
Warm regenerator cold side working medium and the unmatched problem of hot side working medium exchange capability of heat, improve the exchange capability of heat of high temperature regenerator.
For reaching above-mentioned purpose, the coal base supercritical carbon dioxide containing solar energy preheating described in the utility model generates electricity and is
System includes boiler, turbine, main compressor, recompression machine, generator, forecooler, cryogenic regenerator, high temperature regenerator and solar energy
Middle temperature preheater；
The weary gas outlet of turbine is divided into two-way successively after the hot side of high temperature regenerator and the hot side of cryogenic regenerator, wherein
Pre-cooled device and main compressor are connected with the cold side input port of cryogenic regenerator successively all the way, and another road is divided into after recompression machine
Two-way, is wherein connected with the entrance of the middle temperature preheater of solar energy all the way, and another road is passed through with the cold side outlet port of cryogenic regenerator
The cold side input port of pipeline Guan Houyu high temperature regenerators is connected, the cold side outlet port of high temperature regenerator and the middle temperature preheater of solar energy
Outlet be connected by the working medium entrances of pipeline simultaneously Guan Houyu boilers, the sender property outlet of boiler is connected with the working medium entrances of turbine
Logical.
The hot side outlet of cryogenic regenerator is divided into two-way by current divider.
The outlet of recompression machine is divided into two-way by pre- heat shunt.
When the design temperature of turbine entrance working medium is less than 500 DEG C, the middle temperature preheater of solar energy is slot type structure, butterfly knot
Structure or tower structure.
When the design temperature of turbine entrance working medium is more than or equal to 500 DEG C and is less than or equal to 620 DEG C, the middle temperature preheating of solar energy
Device is tower structure or butterfly structure.
The working medium flow entered in the middle temperature preheater of solar energy is the 0%-10% for entering into working medium flow in boiler.
The utility model has the advantages that：
Coal base supercritical carbon dioxide electricity generation system containing solar energy preheating described in the utility model is using in solar energy
Warm preheating technology, increases the middle temperature preheater of solar energy between recompression machine and the working medium entrances of boiler, specifically, recompresses machine
Outlet be divided into two-way, be wherein connected with the middle temperature preheater of solar energy all the way, the cold side outlet port of another road and cryogenic regenerator
And the cold side input port of Guan Houyu high temperature regenerators is connected, the cold side outlet port of high temperature regenerator is gone out with the middle temperature preheater of solar energy
Mouth is connected by the entrance of pipeline Guan Houyu boilers, and the middle temperature preheater of solar energy passes through the middle temperature preheating technology of solar energy by one
Part working medium is heated to the Temperature of Working of high temperature regenerator cold side outlet port, is then re-used as Biological process and is incorporated in boiler, in reality
When border operates, the flow for entering into working medium in the middle temperature preheater of solar energy can be adjusted according to sunlight intensity, so as to effective
High temperature regenerator cold side and hot side are solved due to the unmatched problem of exchange capability of heat that working medium physical difference is brought, high temperature is improved and is returned
The heat exchange efficiency of hot device, improves the temperature for entering working medium in boiler, saves boiler oil.
Description of the drawings
Fig. 1 is structural representation of the present utility model.
Wherein, 1 be forecooler, 2 be main compressor, 3 be recompression machine, 4 be cryogenic regenerator, 5 be pre- heat shunt, 6
For high temperature regenerator, 7 be the middle temperature preheater of solar energy, 8 be boiler, 9 be turbine, 10 be generator, 11 be current divider.
Specific embodiment
Below in conjunction with the accompanying drawings the utility model is described in further detail：
With reference to Fig. 1, the coal base supercritical carbon dioxide electricity generation system containing solar energy preheating described in the utility model includes
Boiler 8, turbine 9, main compressor 2, recompression machine 3, generator 10, forecooler 1, cryogenic regenerator 4, high temperature regenerator 6 and too
Sun can middle temperature preheater 7；The weary gas outlet of turbine 9 divides after the hot side of high temperature regenerator 6 and the hot side of cryogenic regenerator 4 successively
For two-way, wherein pre-cooled device 1 and main compressor 2 are connected with the cold side input port of cryogenic regenerator 4 successively all the way, another road warp
It is divided into two-way after recompression machine 3, is wherein connected with the entrance of the middle temperature preheater 7 of solar energy all the way, another road and low temperature backheat
The cold side outlet port of device 4 is connected by the cold side input port of pipeline Guan Houyu high temperature regenerator 6, and the cold side of high temperature regenerator 6 goes out
Mouth is connected by the working medium entrances of pipeline Guan Houyu boilers 8 with the outlet of the middle temperature preheater 7 of solar energy, the working medium of boiler 8
Outlet is connected with the working medium entrances of turbine 9.Specifically, it is two-way that the hot side outlet of cryogenic regenerator 4 passes through 11 points of current divider；
5 points by pre- heat shunt of the outlet of recompression machine 3 is two-way.
Working medium flow in system is：The weary gas of the output of turbine 9 flows through the hot side and low temperature backheat of high temperature regenerator 6 successively
The hot side of device 4 is heated to respective cold side working medium, is then two-way through 11 points of current divider again, the pre-cooled device in wherein another road
1 heat release, main compressor 2 are entered into after boosting in the cold side of cryogenic regenerator 4 and are heated, and another road is boosted through recompression machine 3 and in advance
5 points of heat shunt is two-way, and working medium enters the middle temperature preheater 7 of solar energy and heats all the way, and another road working medium is cold with cryogenic regenerator 4
The working medium of side output is entered in the cold side of high temperature regenerator 6 after confluxing and is heated, the working medium of the middle output of temperature preheater 7 of solar energy and
The working medium of 6 cold side of high temperature regenerator output is entered in boiler 8 as Biological process after converging, and working medium in boiler 8 is heated to designing
Parameter, subsequently enters in turbine 9 and does work, and turbine 9 drives generator 10 to realize generating electricity, and working medium becomes after expansion work in turbine 9
Into weary gas, so that working medium forms closed cycle in whole system.
The middle temperature preheater 7 of solar energy is arranged in the position between 8 entrance of outlet and boiler of recompression machine 3, in solar energy
The passage of warm preheater 7 is in parallel each other with the cold side channel of high temperature regenerator 6.Split ratio in pre- heat shunt 5 is strong with illumination
Degree is adjusted, and adjustable range is the 0%- that working medium flow accounts for the total working medium flow of the circulatory system in the middle temperature preheater 7 of solar energy
10%, it is to ensure the working medium temperature rise basic of the working medium temperature rise with high temperature regenerator 6 of the middle temperature preheater 7 of solar energy to adjust principle
Cause.By taking 25MPa, 600 DEG C of supercritical carbon dioxide Brayton cycle electricity generation system as an example, it is computed understanding：Work as intensity of illumination
When preferably, when working medium shunt volume is system total working medium flow 10% in the middle temperature preheater 7 of solar energy, height can be completely eliminated
6 cold side of warm regenerator and the unmatched problem of hot side working medium exchange capability of heat, can improve cycle efficieny 1%-2%；Work as illumination condition
The poor time, in the middle temperature preheater 7 of solar energy, working medium shunt volume is system total flow 0%, and now electricity generation system is equivalent to mark
The accurate supercritical carbon dioxide Brayton cycle electricity generation system containing shunting recompression.
In addition, the pattern of the middle temperature preheater 7 of solar energy can be chosen according to the parameter of the whole circulatory system, when turbine 9 enters
When the design temperature of mouth is less than 500 DEG C, about 100-150 DEG C of the temperature of the outlet of machine 3 is recompressed, and the temperature of 8 entrance of boiler is
350-450 DEG C, the middle temperature preheater 7 of solar energy can select slot type structure, dish-style structure or tower structure；When setting for 9 entrance of turbine
When meter temperature is 500-620 DEG C, the temperature for recompressing the outlet of machine 3 is 150-200 DEG C, and the temperature of 8 entrance of boiler is 450-550
DEG C, the middle 7 preferential selection tower structure of temperature preheater of solar energy or dish-style structure.
Claims (6)
1. a kind of coal base supercritical carbon dioxide electricity generation system containing solar energy preheating, it is characterised in that including boiler (8), thoroughly
Flat (9), main compressor (2), recompression machine (3), generator (10), forecooler (1), cryogenic regenerator (4), high temperature regenerator
And solar energy is middle temperature preheater (7) (6)；
The weary gas outlet of turbine (9) is divided into two successively after the hot side of high temperature regenerator (6) and the hot side of cryogenic regenerator (4)
Road, wherein pre-cooled device (1) and main compressor (2) are connected with the cold side input port of cryogenic regenerator (4) successively all the way, Ling Yilu
Be divided into two-way after recompressing machine (3), be wherein connected with the entrance of solar energy middle temperature preheater (7) all the way, another road with low
The cold side outlet port of warm regenerator (4) is connected by the cold side input port of pipeline Guan Houyu high temperature regenerators (6), high temperature regenerator
(6) cold side outlet port is connected by the working medium entrances of pipeline Guan Houyu boilers (8) with the outlet of solar energy middle temperature preheater (7)
Logical, the sender property outlet of boiler (8) is connected with the working medium entrances of turbine (9).
2. according to claim 1 containing solar energy preheating coal base supercritical carbon dioxide electricity generation system, it is characterised in that
The hot side outlet of cryogenic regenerator (4) is divided into two-way by current divider (11).
3. according to claim 1 containing solar energy preheating coal base supercritical carbon dioxide electricity generation system, it is characterised in that
The outlet of recompression machine (3) is divided into two-way by pre- heat shunt (5).
4. according to claim 1 containing solar energy preheating coal base supercritical carbon dioxide electricity generation system, it is characterised in that
When the design temperature of turbine (9) entrance working medium is less than 500 DEG C, solar energy middle temperature preheater (7) is slot type structure, butterfly structure
Or tower structure.
5. according to claim 1 containing solar energy preheating coal base supercritical carbon dioxide electricity generation system, it is characterised in that
When the design temperature of turbine (9) entrance working medium is more than or equal to 500 DEG C and is less than or equal to 620 DEG C, solar energy is middle temperature preheater (7)
For tower structure or butterfly structure.
6. according to claim 1 containing solar energy preheating coal base supercritical carbon dioxide electricity generation system, it is characterised in that
The working medium flow entered in solar energy middle temperature preheater (7) is the 0%-10% for entering into working medium flow in boiler (8).
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| CN201621057345.1U CN206016878U (en) | 2016-09-14 | 2016-09-14 | A kind of coal base supercritical carbon dioxide electricity generation system containing solar energy preheating |
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| CN201621057345.1U CN206016878U (en) | 2016-09-14 | 2016-09-14 | A kind of coal base supercritical carbon dioxide electricity generation system containing solar energy preheating |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437904A (en) * | 2016-09-14 | 2017-02-22 | 西安热工研究院有限公司 | Solar medium-temperature preheating coal-based supercritical carbon dioxide generating system |
| CN107630726A (en) * | 2017-09-26 | 2018-01-26 | 上海发电设备成套设计研究院有限责任公司 | A kind of multipotency hybrid power system and method based on supercritical carbon dioxide circulation |
| CN110966058A (en) * | 2019-12-03 | 2020-04-07 | 东方电气集团东方汽轮机有限公司 | Transcritical CO2Closed circulation system |
| CN112832882A (en) * | 2021-01-27 | 2021-05-25 | 中冶华天南京工程技术有限公司 | Heating furnace energy-saving system based on supercritical carbon dioxide and operation method |
-
2016
- 2016-09-14 CN CN201621057345.1U patent/CN206016878U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437904A (en) * | 2016-09-14 | 2017-02-22 | 西安热工研究院有限公司 | Solar medium-temperature preheating coal-based supercritical carbon dioxide generating system |
| CN106437904B (en) * | 2016-09-14 | 2018-07-17 | 西安热工研究院有限公司 | A kind of coal base supercritical carbon dioxide electricity generation system of solar energy medium temperature preheating |
| CN107630726A (en) * | 2017-09-26 | 2018-01-26 | 上海发电设备成套设计研究院有限责任公司 | A kind of multipotency hybrid power system and method based on supercritical carbon dioxide circulation |
| CN107630726B (en) * | 2017-09-26 | 2023-08-29 | 上海发电设备成套设计研究院有限责任公司 | Multi-energy hybrid power generation system and method based on supercritical carbon dioxide circulation |
| CN110966058A (en) * | 2019-12-03 | 2020-04-07 | 东方电气集团东方汽轮机有限公司 | Transcritical CO2Closed circulation system |
| CN112832882A (en) * | 2021-01-27 | 2021-05-25 | 中冶华天南京工程技术有限公司 | Heating furnace energy-saving system based on supercritical carbon dioxide and operation method |
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