CN209763024U - supercritical CO2 boiler system for reducing flow resistance of working medium through working medium bypass - Google Patents
supercritical CO2 boiler system for reducing flow resistance of working medium through working medium bypass Download PDFInfo
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- CN209763024U CN209763024U CN201920494832.1U CN201920494832U CN209763024U CN 209763024 U CN209763024 U CN 209763024U CN 201920494832 U CN201920494832 U CN 201920494832U CN 209763024 U CN209763024 U CN 209763024U
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- 238000001816 cooling Methods 0.000 claims abstract description 32
- 239000000779 smoke Substances 0.000 claims description 2
- 238000010248 power generation Methods 0.000 abstract description 16
- 230000008676 import Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 46
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
Abstract
The utility model discloses a supercritical CO2 boiler system for reducing working medium flow resistance through a working medium bypass, which comprises a primary gas-gas cooling wall, a primary gas mixing header, a low-temperature superheater, a high-temperature superheater, a secondary gas-gas cooling wall, a secondary gas mixing header, a low-temperature reheater, a high-temperature reheater, a secondary air preheater, an SCR denitration device and a primary air preheater; the utility model discloses a working medium bypass shunts the import working medium of the cold wall of gas of once and the cold wall of gas of secondary respectively, makes the working medium flow who gets into the cold wall of gas of once and the cold wall of gas of secondary reduce to can show the flow resistance who reduces the gas of the cold wall of supercritical CO2 boiler and secondary gas, help improving the efficiency of supercritical CO2 brayton cycle power generation system.
Description
Technical Field
The utility model belongs to super supercritical CO2 boiler power generation field relates to a reduce super supercritical CO2 boiler system of working medium flow resistance through the working medium bypass.
Background
Increasing the efficiency of power generation units is a constant topic and goal of power industry research. For power generation enterprises, the higher the cycle efficiency of the system, the lower the energy consumption per unit power generation amount, and the lower the corresponding energy consumption amount and pollutant emission amount. Numerous studies have shown that the supercritical CO2 brayton cycle is a new concept advanced power system with great potential. Because the supercritical CO2 has the characteristics of large energy density, high heat transfer efficiency and the like, the power generation efficiency of the supercritical CO2 Brayton cycle power generation system is higher than that of the traditional steam Rankine cycle power generation system by more than 5 percent under the same temperature level. In addition, compared with the traditional steam Rankine cycle power generation system, the supercritical CO2 cycle power generation system has the advantages that the equipment such as a compressor, a turbine and a heat regenerator is very compact, and the weight and the occupied area are greatly reduced. Therefore, for the generator sets with higher temperature parameters, such as 650 ℃ generator sets, 700 ℃ grade generator sets and the like, the supercritical CO2 Brayton cycle power generation system is undoubtedly the best choice.
The supercritical CO2 boiler is one of the important devices in a large coal-based supercritical CO2 Brayton cycle power generation system, and the performance of the boiler directly influences the efficiency and the economy of the whole power generation system. Research shows that the flow resistance of working media in the supercritical CO2 boiler has a very obvious influence on the power generation efficiency of the system. The system power generation efficiency decreases significantly as the resistance to the flow of the media in the supercritical CO2 boiler increases. Different from a traditional steam boiler, the mass flow of the working medium of the supercritical CO2 boiler is 6-8 times of that of the steam boiler under the same capacity, so that the flow resistance of the working medium of the supercritical CO2 boiler is far greater than that of the steam boiler. How to reduce the working fluid flow resistance of the supercritical CO2 boiler has become a research hotspot in the field. However, there is no report on this aspect in the prior published patent.
disclosure of Invention
an object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a reduce supercritical CO2 boiler system of working medium flow resistance through the working medium bypass, this system can show the flow resistance who reduces in supercritical CO2 boiler primary gas air-cooled wall and the secondary gas air-cooled wall to can show the flow resistance who reduces supercritical CO2 boiler primary gas and secondary gas.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
A supercritical CO2 boiler system for reducing flow resistance of a working medium through a working medium bypass comprises a primary gas-gas cooling wall 1, a primary gas mixing header 2, a low-temperature superheater 3, a high-temperature superheater 4, a secondary gas-gas cooling wall 5, a secondary gas mixing header 6, a low-temperature reheater 7, a high-temperature reheater 8, a secondary air preheater 9, an SCR denitration device 10 and a primary air preheater 11;
The inlet working medium of the primary gas-gas cooling wall 1 of the supercritical CO2 boiler is divided into two paths, wherein one path is communicated with the inlet of the primary gas-gas cooling wall 1, the other path is communicated with the inlet of the primary gas mixing header 2 through a bypass pipeline, the outlet of the primary gas-gas cooling wall 1 is also communicated with the inlet of the primary gas mixing header 2, the mixed working medium outlet of the primary gas mixing header 2 is communicated with the inlet of a low-temperature superheater 3, the working medium outlet of the low-temperature superheater 3 is communicated with the inlet of a high-temperature superheater 4, the working medium outlet of the high-temperature superheater 4 is connected with a high-pressure turbine for applying work outwards, the high-pressure turbine exhaust gas after applying work is divided into two paths, wherein one path is communicated with the inlet of a secondary gas cooling wall 5, the other path is communicated with the inlet of a secondary gas mixing header 6 through a bypass pipeline, the outlet of the secondary gas cooling wall 5 is also communicated with the inlet of a secondary, a working medium outlet of the low-temperature reheater 7 is communicated with an inlet of the high-temperature reheater 8, and a working medium at an outlet of the high-temperature reheater 8 enters the low-pressure turbine to do work outwards;
The secondary air preheater 9, the SCR denitration device 10 and the primary air preheater 11 are sequentially arranged at the downstream of the low-temperature superheater 3 and the low-temperature reheater 7, and outlet air of the primary air preheater 11 is communicated with an air inlet of the secondary air preheater 9.
And the low-temperature superheater 3 and the low-temperature reheater 7 are arranged in a tail flue of the boiler side by side.
The outlet smoke temperature of the secondary air preheater 9 under the rated working condition is 320-380 ℃.
The method for reducing the working medium flow resistance of the supercritical CO2 boiler system for reducing the working medium flow resistance through a working medium bypass comprises the steps that working medium at the inlet of a primary gas-gas cooling wall 1 of a supercritical CO2 boiler is divided into two paths, wherein one path of working medium enters the primary gas-gas cooling wall to absorb heat, the other path of working medium enters a primary gas mixing collecting box 2 through a bypass pipeline, the working medium is mixed with the working medium in the primary gas-gas cooling wall which absorbs heat and then enters a low-temperature superheater 3, the working medium at the outlet of the low-temperature superheater 3 is communicated with the inlet of the high-temperature superheater 4, the working medium at the outlet of the high-temperature superheater 4 enters a high-pressure turbine to do work outwards, the exhaust of the high-pressure turbine which does work is divided into two paths, one path of working medium enters a secondary gas-gas cooling wall 5 to absorb heat, the other path of working medium enters a secondary gas mixing collecting box 6 through the bypass pipeline and, and the outlet working medium of the high-temperature reheater 8 enters the low-pressure turbine to do work externally.
The utility model discloses following beneficial effect has:
a reduce supercritical CO2 boiler system of working medium flow resistance through working medium bypass, have following advantage: the inlet working media of the primary gas-gas cooling wall and the secondary gas-gas cooling wall are respectively shunted through the working medium bypass, so that the flow of the working media entering the primary gas-gas cooling wall and the secondary gas-gas cooling wall is reduced, the flow resistance of the primary gas and the secondary gas of the supercritical CO2 boiler can be obviously reduced, and the efficiency of the whole supercritical CO2 Brayton cycle power generation system is improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is a primary gas air cooling wall, 2 is a primary gas mixing header, 3 is a low temperature superheater, 4 is a high temperature superheater, 5 is a secondary gas air cooling wall, 6 is a secondary gas mixing header, 7 is a low temperature reheater, 8 is a high temperature reheater, 9 is a secondary air preheater, 10 is an SCR denitrification facility, and 11 is a primary air preheater.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
Referring to fig. 1, the utility model discloses a reduce supercritical CO2 boiler system of working medium flow resistance through working medium bypass, including gas cooling wall 1 of the primary gas, gas mixing header 2, low temperature over heater 3, high temperature over heater 4, gas cooling wall 5 of the secondary gas, gas mixing header 6 of the secondary gas, low temperature re-heater 7, high temperature re-heater 8, secondary air heater 9, SCR denitrification facility 10 and primary air heater 11;
The inlet working medium of the primary gas-gas cooling wall of the supercritical CO2 boiler is divided into two paths, wherein one path enters the primary gas-gas cooling wall to absorb heat, the other path enters the primary gas mixing header 2 through a bypass pipeline, mixing with the working medium in the primary gas-gas cooling wall which finishes heat absorption, then entering a low-temperature superheater 3, communicating the outlet working medium of the low-temperature superheater 3 with the inlet of a high-temperature superheater 4, entering the outlet working medium of the high-temperature superheater 4 into a high-pressure turbine to do work outwards, dividing the high-pressure turbine exhaust which finishes the work into two paths, one path of the air enters the secondary air cooling wall to absorb heat, the other path of the air enters the secondary air mixing header 6 through a bypass pipeline, and the mixed working medium is mixed with the working medium in the secondary gas cold wall which finishes heat absorption and then enters a low-temperature reheater 7, the outlet working medium of the low-temperature reheater 7 is communicated with the inlet of a high-temperature reheater 8, and the outlet working medium of the high-temperature reheater 8 enters a low-pressure turbine to do work outwards.
The low-temperature superheater 3 and the low-temperature reheater 7 are arranged in a boiler tail flue side by side, and a secondary air preheater 9, an SCR denitration device 10 and a primary air preheater 11 are arranged on the downstream of the low-temperature superheater and the low-temperature reheater.
The secondary air preheater 9 is used for reducing the temperature of flue gas entering the SCR denitration device 10 to the optimum temperature of the SCR catalyst, and the temperature of the flue gas at the outlet of the secondary air preheater 9 is 320-380 ℃ under the rated working condition.
the above-mentioned embodiments further describe the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (3)
1. A supercritical CO2 boiler system for reducing flow resistance of a working medium through a working medium bypass is characterized by comprising a primary gas-gas cooling wall (1), a primary gas mixing header (2), a low-temperature superheater (3), a high-temperature superheater (4), a secondary gas-gas cooling wall (5), a secondary gas mixing header (6), a low-temperature reheater (7), a high-temperature reheater (8), a secondary air preheater (9), an SCR denitration device (10) and a primary air preheater (11);
The inlet working medium of the supercritical CO2 boiler primary gas-gas cooling wall (1) is divided into two paths, wherein one path is communicated with the inlet of the primary gas-gas cooling wall (1), the other path is communicated with the inlet of the primary gas mixing header (2) through a bypass pipeline, the outlet of the primary gas-gas cooling wall (1) is also communicated with the inlet of the primary gas mixing header (2), the mixed working medium outlet of the primary gas mixing header (2) is communicated with the inlet of a low-temperature superheater (3), the working medium outlet of the low-temperature superheater (3) is communicated with the inlet of a high-temperature superheater (4), the working medium outlet of the high-temperature superheater (4) is connected with a high-pressure turbine to apply work outwards, the high-pressure turbine exhaust gas after applying work is divided into two paths, one path is communicated with the inlet of a secondary gas cooling wall (5), the other path is communicated with the inlet of a secondary gas mixing header (6) through a bypass pipeline, the outlet of the secondary gas cooling wall (5, a mixed working medium outlet of the secondary gas mixing header (6) is communicated with an inlet of a low-temperature reheater (7), a working medium outlet of the low-temperature reheater (7) is communicated with an inlet of a high-temperature reheater (8), and an outlet working medium of the high-temperature reheater (8) enters a low-pressure turbine to do work outwards;
The secondary air preheater (9), the SCR denitration device (10) and the primary air preheater (11) are sequentially arranged at the downstream of the low-temperature superheater (3) and the low-temperature reheater (7), and outlet air of the primary air preheater (11) is communicated with an air inlet of the secondary air preheater (9).
2. The supercritical CO2 boiler system for reducing the flow resistance of working medium through working medium bypass according to claim 1, characterized in that the low temperature superheater (3) and the low temperature reheater (7) are arranged side by side in the boiler back flue.
3. The supercritical CO2 boiler system capable of reducing working medium flow resistance through a working medium bypass according to claim 1, wherein the outlet smoke temperature of the secondary air preheater (9) under rated working conditions is 320-380 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920494832.1U CN209763024U (en) | 2019-04-12 | 2019-04-12 | supercritical CO2 boiler system for reducing flow resistance of working medium through working medium bypass |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920494832.1U CN209763024U (en) | 2019-04-12 | 2019-04-12 | supercritical CO2 boiler system for reducing flow resistance of working medium through working medium bypass |
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| CN209763024U true CN209763024U (en) | 2019-12-10 |
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| CN201920494832.1U Withdrawn - After Issue CN209763024U (en) | 2019-04-12 | 2019-04-12 | supercritical CO2 boiler system for reducing flow resistance of working medium through working medium bypass |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109945156A (en) * | 2019-04-12 | 2019-06-28 | 西安热工研究院有限公司 | The supercritical CO for reducing Working fluid flow resistance is bypassed by working medium2Boiler system and method |
-
2019
- 2019-04-12 CN CN201920494832.1U patent/CN209763024U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109945156A (en) * | 2019-04-12 | 2019-06-28 | 西安热工研究院有限公司 | The supercritical CO for reducing Working fluid flow resistance is bypassed by working medium2Boiler system and method |
| CN109945156B (en) * | 2019-04-12 | 2024-01-30 | 西安热工研究院有限公司 | Supercritical CO for reducing working medium flow resistance through working medium bypass 2 Boiler system and method |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20191210 Effective date of abandoning: 20240130 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20191210 Effective date of abandoning: 20240130 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |