CN109945156A - The supercritical CO for reducing Working fluid flow resistance is bypassed by working medium2Boiler system and method - Google Patents
The supercritical CO for reducing Working fluid flow resistance is bypassed by working medium2Boiler system and method Download PDFInfo
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- CN109945156A CN109945156A CN201910294657.6A CN201910294657A CN109945156A CN 109945156 A CN109945156 A CN 109945156A CN 201910294657 A CN201910294657 A CN 201910294657A CN 109945156 A CN109945156 A CN 109945156A
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- 239000012530 fluid Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 38
- 230000009467 reduction Effects 0.000 claims abstract description 8
- 230000008676 import Effects 0.000 claims abstract description 7
- 238000010521 absorption reaction Methods 0.000 claims description 10
- 239000000779 smoke Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 abstract description 7
- 239000007789 gas Substances 0.000 description 48
- 230000008901 benefit Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The invention discloses a kind of supercritical COs that reduction Working fluid flow resistance is bypassed by working medium2Boiler system and method, the system include primary gas air cooling wall, primary gas mixing header, low temperature superheater, high temperature superheater, secondary gas air cooling wall, secondary gas mixing header, low-temperature reheater, high temperature reheater, secondary air preheater, SCR denitration device and main air preheater；The present invention is bypassed by working medium and is shunted respectively to the import working medium of primary gas air cooling wall and secondary gas air cooling wall, makes the working medium flow reduction for entering primary gas air cooling wall and secondary gas air cooling wall, so as to significantly reduce supercritical CO2The flow resistance of boiler primary gas and secondary gas, helps to improve supercritical CO2The efficiency of Brayton cycle electricity generation system.
Description
Technical field
The invention belongs to supercritical COs2Boiler power field, being related to a kind of bypass by working medium reduces Working fluid flow resistance
Supercritical CO2Boiler system and method.
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.Largely studies have shown that supercritical CO2Brayton cycle is the new concept advanced power systems of great potential.Due to super
Critical CO2Have the characteristics that energy density is big, heat transfer efficiency is high, supercritical CO under same temperature levels2Brayton cycle power generation system
The generating efficiency of system is higher by 5 percentage points or more than conventional vapor Rankine cycle electricity generation system.In addition, with conventional vapor Rankine
Cycle generating system is compared, supercritical CO2The equipment such as compressor, turbine and the regenerator of cycle generating system are extremely compact, weight
Amount and land occupation greatly reduce.Therefore, for the generating set of higher temperature parameter, such as 650 DEG C of units, 700 DEG C of grade units,
Using supercritical CO2Brayton cycle electricity generation system is undoubtedly optimal selection.
Supercritical CO2Boiler is big moulded coal base supercritical CO2One of important equipment in Brayton cycle electricity generation system,
Performance directly affects the efficiency and economy of entire electricity generation system.Studies have shown that supercritical CO2The flowing resistance of working medium in boiler
Influence highly significant of the power to system generating efficiency.System generating efficiency is with supercritical CO2The increasing of Working fluid flow resistance in boiler
Add and significantly reduces.Different from conventional vapor boiler, supercritical CO2The working medium mass flow of boiler is steam copper under identical capacity
6~8 times of furnace, so as to cause supercritical CO2The Working fluid flow resistance of boiler is much larger than steam boiler.How supercritical CO is reduced2
The Working fluid flow resistance of boiler has become the research hotspot in the field.However, there are no be directed to be somebody's turn to do in existing publication
The report of aspect.
Summary of the invention
It is an object of the invention to overcome the above-mentioned prior art, providing a kind of bypass by working medium reduces working medium
The supercritical CO of flow resistance2Boiler system and method, the system can significantly reduce supercritical CO2The primary gas air cooling wall of boiler
With secondary gas air cooling wall in flow resistance, so as to significantly reduce the flowing of supercritical CO 2 boiler primary gas and secondary gas
Resistance.
In order to achieve the above objectives, the present invention adopts the following technical scheme:
It is a kind of to bypass the supercritical CO for reducing Working fluid flow resistance by working medium2Boiler system, including primary gas air cooling wall
1, primary gas mixing header 2, low temperature superheater 3, high temperature superheater 4, secondary gas air cooling wall 5, secondary gas mixing header 6, low temperature
Reheater 7, high temperature reheater 8, secondary air preheater 9, SCR denitration device 10 and main air preheater 11；
Supercritical CO2The primary gas air cooling 1 import working medium of wall of boiler is divided into two-way, wherein being connected to primary gas air cooling wall 1 all the way
Entrance, another way is connected to the entrance of primary gas mixing header 2 by bypass duct, and primary gas air cooling wall 1 outlet is also connected to one
The entrance of secondary gas mixing header 2, the entrance of the mixed working fluid outlet low temperature superheater 3 of primary gas mixing header 2, low temperature mistake
The sender property outlet of hot device 3 is connected with the entrance of high temperature superheater 4, and the sender property outlet of high temperature superheater 4 connects high pressure turbine pair
Outer acting, the high pressure turbine exhaust after completing acting are divided into two-way again, wherein being connected to the entrance of secondary gas air cooling wall 5 all the way, separately
The entrance of secondary gas mixing header 6 is connected to by bypass duct all the way, secondary gas air cooling wall 5 outlet is also connected to secondary gas mixing collection
The entrance of case 6, the entrance of the mixed working fluid outlet low-temperature reheater 7 of secondary gas mixing header 6, the work of low-temperature reheater 7
Matter outlet is connected with the entrance of high temperature reheater 8, and the outlet working medium of high temperature reheater 8 enters low pressure turbine and externally does work；
The secondary air preheater 9, SCR denitration device 10 and main air preheater 11 are sequentially arranged in low temperature mistake
7 downstream of hot device 3 and low-temperature reheater, the outlet air of main air preheater 11 and the air intake of secondary air preheater 9
It is connected.
The low temperature superheater 3 is arranged side by side on boiler back end ductwork with low-temperature reheater 7.
The outlet smoke temperature of secondary air preheater 9 is 320~380 DEG C under declared working condition.
Described bypasses the supercritical CO for reducing Working fluid flow resistance by working medium2The reduction Working fluid flow of boiler system hinders
The method of power, supercritical CO2The primary gas air cooling 1 import working medium of wall of boiler is divided into two-way, wherein entering primary gas air cooling wall all the way
Heat absorption, another way enter primary gas mixing header 2 by bypass duct, mixed with the working medium in the primary gas air cooling wall for completing heat absorption
Enter low temperature superheater 3 after conjunction, the outlet working medium of low temperature superheater 3 is connected with the entrance of high temperature superheater 4, high temperature superheater
4 outlet working medium enters high pressure turbine and externally does work, complete acting after high pressure turbine exhaust again is divided into two-way, wherein all the way into
Enter secondary gas air cooling wall 5 to absorb heat, another way enters secondary gas mixing header 6 by bypass duct, with the secondary gas for completing heat absorption
Enter low-temperature reheater 7, the outlet working medium of low-temperature reheater 7 and the entrance of high temperature reheater 8 after the working medium mixing being gas-cooled in wall
It is connected, the outlet working medium of high temperature reheater 8 enters low pressure turbine and externally does work.
The invention has the following advantages:
A kind of supercritical CO bypassing reduction Working fluid flow resistance by working medium of the present invention2Boiler system has
Following advantage: respectively shunting primary gas the be gas-cooled import working medium of wall of wall and secondary gas that is gas-cooled by working medium bypass, make into
The working medium flow for entering primary gas air cooling wall and secondary gas air cooling wall reduces, so as to significantly reduce supercritical CO2Boiler is primary
The flow resistance of gas and secondary gas improves entire supercritical CO2The efficiency of Brayton cycle electricity generation system.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Wherein, 1 for primary gas be gas-cooled wall, 2 be primary gas mixing header, 3 be low temperature superheater, 4 be high temperature superheater, 5
For secondary gas be gas-cooled wall, 6 be secondary gas mixing header, 7 be low-temperature reheater, 8 be high temperature reheater, 9 be secondary air preheating
Device, 10 be SCR denitration device, 11 be main air preheater.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing:
With reference to Fig. 1, a kind of supercritical CO bypassing reduction Working fluid flow resistance by working medium of the present invention2Boiler system
System, including primary gas air cooling wall 1, primary gas mixing header 2, low temperature superheater 3, high temperature superheater 4, secondary gas air cooling wall 5, two
Secondary gas mixing header 6, low-temperature reheater 7, high temperature reheater 8, secondary air preheater 9, SCR denitration device 10 and main air
Preheater 11；
Supercritical CO2The primary gas air cooling wall import working medium of boiler is divided into two-way, inhales wherein entering primary gas air cooling wall all the way
Heat, another way enter primary gas mixing header 2 by bypass duct, mix with the working medium in the primary gas air cooling wall for completing heat absorption
Enter low temperature superheater 3 afterwards, the outlet working medium of low temperature superheater 3 is connected with the entrance of high temperature superheater 4, high temperature superheater 4
Outlet working medium enter high pressure turbine and externally do work, the high pressure turbine exhaust after completing acting is divided into two-way again, wherein all the way into
Enter secondary gas air cooling wall heat absorption, another way enters secondary gas mixing header 6 by bypass duct, with the secondary gas gas for completing heat absorption
Enter low-temperature reheater 7, the outlet working medium and the entrance phase of high temperature reheater 8 of low-temperature reheater 7 after working medium mixing in cold wall
Connection, the outlet working medium of high temperature reheater 8 enter low pressure turbine and externally do work.
The low temperature superheater 3 is arranged side by side on boiler back end ductwork with low-temperature reheater 7, is disposed with second level sky downstream
Air preheater 9, SCR denitration device 10 and main air preheater 11.
The effect of the secondary air preheater 9 is that the flue-gas temperature into SCR denitration device 10 is made to be reduced to SCR catalysis
The optimal temperature of agent, it is 320~380 DEG C that secondary air preheater 9, which exports smoke temperature, under declared working condition.
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 (4)
1. a kind of bypass the supercritical CO for reducing Working fluid flow resistance by working medium2Boiler system, which is characterized in that including primary
Gas air cooling wall (1), primary gas mixing header (2), low temperature superheater (3), high temperature superheater (4), the air cooling of secondary gas wall (5), two
Secondary gas mixing header (6), low-temperature reheater (7), high temperature reheater (8), secondary air preheater (9), SCR denitration device (10)
With main air preheater (11)；
Primary gas air cooling wall (1) the import working medium of supercritical CO 2 boiler is divided into two-way, wherein being connected to primary gas air cooling wall (1) all the way
Entrance, another way is connected to the entrance of primary gas mixing header (2) by bypass duct, and primary gas air cooling wall (1) outlet also connects
Lead to the entrance of primary gas mixing header (2), the mixed working fluid outlet low temperature superheater (3) of primary gas mixing header (2)
The sender property outlet of entrance, low temperature superheater (3) is connected with the entrance of high temperature superheater (4), and the working medium of high temperature superheater (4) goes out
Mouth connection high pressure turbine externally does work, and the high pressure turbine after completing acting is vented and is divided into two-way, wherein being connected to secondary gas all the way
The entrance of air cooling wall (5), another way are connected to the entrance of secondary gas mixing header (6) by bypass duct, and secondary gas is gas-cooled wall (5)
Outlet is also connected to the entrance of secondary gas mixing header (6), the mixed working fluid outlet cold reheat of secondary gas mixing header (6)
The sender property outlet of the entrance of device (7), low-temperature reheater (7) is connected with the entrance of high temperature reheater (8), high temperature reheater (8)
Outlet working medium enter low pressure turbine and externally do work；
The secondary air preheater (9), SCR denitration device (10) and main air preheater (11) are sequentially arranged in low temperature mistake
Hot device (3) and low-temperature reheater (7) downstream, outlet air and secondary air preheater (9) of main air preheater (11)
Air intake is connected.
2. a kind of supercritical CO for bypassing reduction Working fluid flow resistance by working medium according to claim 12Boiler system,
It is characterized in that, the low temperature superheater (3) and low-temperature reheater (7) are arranged side by side on boiler back end ductwork.
3. a kind of supercritical CO for bypassing reduction Working fluid flow resistance by working medium according to claim 12Boiler system,
It is characterized in that, the outlet smoke temperature of secondary air preheater (9) is 320~380 DEG C under declared working condition.
4. claims 1 to 3 is described in any item to bypass the supercritical CO for reducing Working fluid flow resistance by working medium2Boiler system
Reduction Working fluid flow resistance method, which is characterized in that supercritical CO2Primary gas air cooling wall (1) the import working medium of boiler is divided into
Two-way, wherein entering the air cooling wall heat absorption of primary gas all the way, another way enters primary gas mixing header (2) by bypass duct, with
Enter low temperature superheater (3) after completing the working medium mixing in the primary gas air cooling wall of heat absorption, the outlet working medium of low temperature superheater (3)
It is connected with the entrance of high temperature superheater (4), the outlet working medium of high temperature superheater (4) enters high pressure turbine and externally does work, and completes
High pressure turbine exhaust after acting is divided into two-way again, wherein entering secondary gas air cooling wall (5) heat absorption all the way, another way passes through bypass
Pipeline enters secondary gas mixing header (6), enters cold reheat after mixing with the working medium in the secondary gas air cooling wall for completing heat absorption
The outlet working medium of device (7), low-temperature reheater (7) is connected with the entrance of high temperature reheater (8), the outlet of high temperature reheater (8)
Working medium enters low pressure turbine and externally does work.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910294657.6A CN109945156B (en) | 2019-04-12 | 2019-04-12 | Supercritical CO for reducing working medium flow resistance through working medium bypass 2 Boiler system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910294657.6A CN109945156B (en) | 2019-04-12 | 2019-04-12 | Supercritical CO for reducing working medium flow resistance through working medium bypass 2 Boiler system and method |
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| CN109945156A true CN109945156A (en) | 2019-06-28 |
| CN109945156B CN109945156B (en) | 2024-01-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242860A (en) * | 2019-07-01 | 2019-09-17 | 西安热工研究院有限公司 | The ice protection system and method fast and safely discharged for supercritical CO 2 electricity generation system |
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| JP2011256818A (en) * | 2010-06-11 | 2011-12-22 | Motoaki Utamura | Exhaust heat recovery power plant and combined plant |
| 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 |
| CN205782806U (en) * | 2016-06-30 | 2016-12-07 | 华能国际电力股份有限公司 | Novel coal-based supercritical carbon dioxide boiler device |
| CN108036295A (en) * | 2017-11-29 | 2018-05-15 | 华北电力大学 | Supercritical CO2The CO of Brayton cycle coal-fired electric generation furnace2Working medium shunts drag-reduction system |
| CN209763024U (en) * | 2019-04-12 | 2019-12-10 | 西安热工研究院有限公司 | supercritical CO2 boiler system for reducing flow resistance of working medium through working medium bypass |
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- 2019-04-12 CN CN201910294657.6A patent/CN109945156B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011256818A (en) * | 2010-06-11 | 2011-12-22 | Motoaki Utamura | Exhaust heat recovery power plant and combined plant |
| 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 |
| CN205782806U (en) * | 2016-06-30 | 2016-12-07 | 华能国际电力股份有限公司 | Novel coal-based supercritical carbon dioxide boiler device |
| CN108036295A (en) * | 2017-11-29 | 2018-05-15 | 华北电力大学 | Supercritical CO2The CO of Brayton cycle coal-fired electric generation furnace2Working medium shunts drag-reduction system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242860A (en) * | 2019-07-01 | 2019-09-17 | 西安热工研究院有限公司 | The ice protection system and method fast and safely discharged for supercritical CO 2 electricity generation system |
| CN110242860B (en) * | 2019-07-01 | 2024-04-05 | 西安热工研究院有限公司 | Anti-icing system and method for rapid and safe emission of supercritical CO2 power generation system |
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| CN109945156B (en) | 2024-01-30 |
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