CN210485670U - Supercritical carbon dioxide boiler working medium temperature regulating system - Google Patents
Supercritical carbon dioxide boiler working medium temperature regulating system Download PDFInfo
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- CN210485670U CN210485670U CN201920579503.7U CN201920579503U CN210485670U CN 210485670 U CN210485670 U CN 210485670U CN 201920579503 U CN201920579503 U CN 201920579503U CN 210485670 U CN210485670 U CN 210485670U
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 186
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 93
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 93
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims description 25
- 125000004122 cyclic group Chemical group 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000003303 reheating Methods 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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Abstract
The utility model relates to a supercritical carbon dioxide boiler working medium temperature regulation system. The utility model discloses the regulation problem of supercritical carbon dioxide boiler working medium temperature has been solved effectively. Part of carbon dioxide working medium in the closed system is cooled and then directly contacted with high-temperature carbon dioxide working medium for heat exchange, and the low-temperature carbon dioxide working medium entering the temperature regulation point of the supercritical carbon dioxide boiler keeps reasonable temperature and flow, so that the temperature of the working medium of the supercritical carbon dioxide boiler is quickly and flexibly regulated, the overtemperature of the heating surface of the boiler is avoided, the running safety of the system is obviously improved, and the service lives of the high-temperature heating surface, the pipeline and the turbine blade in the system are greatly prolonged.
Description
Technical Field
The utility model relates to a supercritical carbon dioxide boiler working medium temperature governing system belongs to the high-efficient cyclic power generation technical field of supercritical carbon dioxide brayton circulation.
Background
Increasingly deficient energy is a factor restricting the development of the current society, and the improvement of the utilization rate of the energy is paid attention by people. Compared with the traditional water-based working medium Rankine cycle, the supercritical carbon dioxide Brayton cycle has the advantages of high cycle thermal efficiency, large energy density, simple and compact system, good safety and the like at 500-700 ℃, does not need to be provided with facilities for deoxidizing, desalting, discharging and draining water, and can reduce the investment cost while improving the system thermal-power conversion efficiency.
For the normal operation of the supercritical carbon dioxide boiler, higher economic benefit can be obtained by keeping the temperature of the supercritical carbon dioxide working medium at the outlet of the boiler to reach a rated value. If the temperature of the supercritical carbon dioxide working medium is too high, the overtemperature and creep speed of metal materials of a boiler heating surface and a turbine can be increased, and the service lives of a high-temperature heating surface, a pipeline and a turbine blade are obviously shortened; if the temperature of the supercritical carbon dioxide working medium is too low, the output of the unit is reduced, and therefore the overall cycle efficiency of the unit is affected. And with the increase of the pressure and the temperature of the power cycle, the high-temperature corrosion rate of the tubes on the heating surface of the boiler can be greatly increased due to the overlarge deviation of the unit operation. Therefore, the temperature of the working medium of the supercritical carbon dioxide boiler is timely and effectively regulated, and the method has important significance for safe and stable operation of the unit.
SUMMERY OF THE UTILITY MODEL
The utility model aims at: the temperature of the working medium of the supercritical carbon dioxide boiler can be flexibly adjusted, so that the safety margin and the adjustment flexibility of the supercritical carbon dioxide boiler are increased.
In order to achieve the above object, the technical scheme of the utility model provides a supercritical carbon dioxide boiler working medium temperature regulation system is provided, a serial communication port, including supercritical carbon dioxide boiler, turbine, regenerator, cooler, compressor unit spare and temperature regulation working medium flow control nest of tubes, wherein: the inlet of the turbine is connected with the outlet of the supercritical carbon dioxide boiler, the outlet of the turbine is connected with the low-pressure side inlet of the heat regenerator, the low-pressure side outlet of the heat regenerator is connected with the heat release side inlet of the main cooling part in the cooler, and the heat release side outlet of the main cooling part is connected with the inlet of the compressor assembly; the outlet of the main compressor assembly is divided into two paths, one path of outlet is connected with the high-pressure side inlet of the heat regenerator, the high-pressure side outlet of the heat regenerator is connected with the inlet of the supercritical carbon dioxide boiler, the other path of outlet of the main compressor assembly is connected with the inlet of the temperature-adjusting working medium flow adjusting pipe group, the outlet of the temperature-adjusting working medium flow adjusting pipe group is connected with the heat-releasing side inlet of the temperature-adjusting working medium cooling part in the cooler, and the heat-releasing side outlet of the temperature-adjusting working medium cooling part is connected with the temperature-adjusting point of the supercritical carbon dioxide boiler in the supercritical carbon dioxide boiler through the temperature-adjusting.
Preferably, the temperature adjusting working medium flow adjusting pipe group comprises a temperature adjusting working medium flow adjusting pipe group flow pipeline and a temperature adjusting working medium flow adjusting pipe group adjusting pipeline connected in parallel with the temperature adjusting working medium flow adjusting pipe group flow pipeline.
Preferably, the compressor assembly comprises one main compressor or comprises a cyclic compression circuit consisting of at least two compressors.
Preferably, the number of the temperature adjusting points of the supercritical carbon dioxide boiler is 1 or at least two, and all the temperature adjusting points of the supercritical carbon dioxide boiler are connected with a heat release side outlet of the temperature adjusting working medium cooling part through the temperature adjusting working medium introducing pipeline.
Preferably, a heating surface of the supercritical carbon dioxide boiler and/or a reheating heating surface of the supercritical carbon dioxide boiler are/is arranged in the supercritical carbon dioxide boiler.
Preferably, the regenerator comprises a low-temperature regenerator and a high-temperature regenerator, a low-pressure side inlet of the high-temperature regenerator is connected with an outlet of the turbine, a low-pressure side outlet of the high-temperature regenerator is connected with a low-pressure side inlet of the low-temperature regenerator, and a low-pressure side outlet of the low-temperature regenerator is connected with a heat release side inlet of a main cooling part in the cooler.
Preferably, the system further comprises a recompressor, wherein the low-pressure side outlet of the low-temperature regenerator is simultaneously connected with the inlet of the recompressor; and a high-pressure side inlet of the low-temperature heat regenerator is connected with an outlet of the compressor assembly, a working medium flowing out of a high-pressure side outlet of the low-temperature heat regenerator is converged with a working medium flowing out of an outlet of the recompressor and then is connected with a high-pressure side inlet of the high-temperature heat regenerator, and a high-pressure side outlet of the high-temperature heat regenerator is connected with an inlet of the supercritical carbon dioxide boiler.
The utility model discloses the regulation problem of supercritical carbon dioxide boiler working medium temperature has been solved effectively. Part of carbon dioxide working medium in the closed system is cooled and then directly contacted with high-temperature carbon dioxide working medium for heat exchange, and the low-temperature carbon dioxide working medium entering the temperature regulation point of the supercritical carbon dioxide boiler keeps reasonable temperature and flow, so that the temperature of the working medium of the supercritical carbon dioxide boiler is quickly and flexibly regulated, the overtemperature of the heating surface of the boiler is avoided, the running safety of the system is obviously improved, and the service lives of the high-temperature heating surface, the pipeline and the turbine blade in the system are greatly prolonged.
The utility model discloses an export at the main compressor draws the bypass that adjusts the temperature to cool off through the cooler, can ensure that the temperature of the working medium that adjusts the temperature keeps at lower level, it is also littleer at the required flow of the in-process that adjusts the temperature like this, avoided producing great influence at the working medium flow of the in-process that adjusts the temperature to the boiler main line.
The utility model discloses in, adjust the temperature through the mode with the direct mixture of carbon dioxide working medium and high temperature carbon dioxide working medium of adjusting the temperature, adjust the temperature effectual, sensitivity is high, the response is fast, the system is simple, the fault rate is low, the investment is low.
Simultaneously the utility model discloses be provided with the working medium flow control nest of tubes circulation pipeline and the working medium flow control nest of tubes regulation pipeline that adjusts the temperature in the working medium flow control nest of tubes that adjusts the temperature. The flow pipeline of the temperature adjusting working medium flow adjusting pipe group is kept normally open, and the flow of the carbon dioxide temperature adjusting working medium is adjusted through the temperature adjusting working medium flow adjusting pipe group, so that the flow adjusting effect can be achieved, thermal shock of the flow adjusting process to the temperature adjusting pipeline is effectively avoided, and the service life of the temperature adjusting pipeline is greatly prolonged.
Drawings
FIG. 1 is a schematic diagram of a working medium temperature regulating system of a supercritical carbon dioxide boiler.
In the figure: 1A-a main compressor; 1B-a recompressor; 2-low temperature regenerator; 3-high temperature regenerator; 4-supercritical carbon dioxide boiler; 4A-an upstream heating surface of a temperature adjusting point of a supercritical carbon dioxide boiler; 4B, heating surface at the downstream of the temperature adjusting point of the supercritical carbon dioxide boiler; 5-turbine; 6-a cooler; 6A-main cooling section; 6B-a temperature-adjusting working medium cooling part; s1-temperature adjusting working medium introducing pipeline; t-temperature adjusting working medium flow adjusting pipe group; TA-temperature adjusting working medium flow adjusting pipe group flow pipeline; TB-temperature adjusting working medium flow adjusting pipe group adjusting pipeline.
Detailed Description
The present invention will be further described with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.
The utility model provides a pair of supercritical carbon dioxide boiler working medium temperature governing system, including main compressor 1A, recompression machine 1B, low temperature regenerator 2, high temperature regenerator 3, supercritical carbon dioxide boiler 4, turbine 5, cooler 6, the working medium flow control nest of tubes T and the working medium introduction pipeline S1 that adjusts the temperature.
The supercritical carbon dioxide boiler 4 comprises a temperature adjusting point of the supercritical carbon dioxide boiler, an upstream heating surface 4A of the temperature adjusting point of the supercritical carbon dioxide boiler and a downstream heating surface 4B of the temperature adjusting point of the supercritical carbon dioxide boiler. The cooler 6 comprises a main cooling part 6A and a tempering medium cooling part 6B. The temperature adjusting working medium flow adjusting pipe group T comprises a temperature adjusting working medium flow adjusting pipe group flow pipeline TA and a temperature adjusting working medium flow adjusting pipe group adjusting pipeline TB.
The inlet of the turbine 5 is connected with the outlet of the supercritical carbon dioxide boiler 4, the outlet of the turbine 5 is connected with the low-pressure side inlet of the high-temperature heat regenerator 3, and the low-pressure side outlet of the high-temperature heat regenerator 3 is connected with the low-pressure side inlet of the low-temperature heat regenerator 2. The low-pressure side outlet of the low-temperature heat regenerator 2 is divided into two paths, one path is connected with the heat release side inlet of the main cooling part 6A in the cooler 6, and the other path is connected with the inlet of the recompressor 1B. The heat release side outlet of the main cooling portion 6A in the cooler 6 is connected to the inlet of the main compressor 1A. The outlet of the main compressor 1A is divided into two paths, one path is connected with the inlet of the high-pressure side of the low-temperature heat regenerator 2, and the other path is connected with the inlet of the temperature-adjusting working medium flow adjusting pipe group T. The high-pressure side outlet working medium of the low-temperature heat regenerator 2 is converged with the outlet working medium of the recompressor 1B and then is connected with the high-pressure side inlet of the high-temperature heat regenerator 3, and the high-pressure side outlet of the high-temperature heat regenerator 3 is connected with the inlet of the supercritical carbon dioxide boiler 4. The outlet of the temperature adjusting working medium flow adjusting pipe group T is connected with the heat release side inlet of the temperature adjusting working medium cooling part 6B in the cooler 6, and the heat release side outlet of the temperature adjusting working medium cooling part 6B in the cooler 6 is connected with the temperature adjusting point of the supercritical carbon dioxide boiler.
The carbon dioxide working medium at the outlet of the supercritical carbon dioxide boiler 4 enters a turbine 5 to do work, the carbon dioxide working medium after doing work sequentially enters the heat release sides of the high-temperature heat regenerator 3 and the low-temperature heat regenerator 2 to release heat, then the carbon dioxide working medium is divided into two paths at the outlet of the low-pressure side of the low-temperature heat regenerator 2, one path enters the main cooling part 6A in the cooler 6 to cool the heat release side and then enters the main compressor 1A, and the other path enters the re-compressor 1B to be pressurized.
The carbon dioxide working medium in the main compressor 1A is pressurized and then divided into two paths, one path of the carbon dioxide working medium enters the heat absorption side of the low-temperature heat regenerator 2 for heat absorption, then is converged with the carbon dioxide working medium pressurized by the secondary compressor 1B, enters the high-pressure side of the high-temperature heat regenerator 3 for heat absorption, and then enters the supercritical carbon dioxide boiler 4 for continuous heat absorption; the other path of the working medium as a temperature adjusting working medium enters a temperature adjusting working medium flow adjusting pipe group T. And then the temperature regulating working medium enters the temperature regulating working medium cooling part 6B for cooling, sequentially flows through the temperature regulating working medium introducing pipeline S1 and the temperature regulating point of the supercritical carbon dioxide boiler, and is directly mixed with the high-temperature carbon dioxide working medium in the heating surface 4A at the upstream of the temperature regulating point of the supercritical carbon dioxide boiler, so that the purpose of regulating the temperature of the heating surface of the boiler is achieved. The temperature of the temperature adjusting working medium is 100 ℃ before cooling, and the temperature is reduced to 75 ℃ after cooling. The flow pipeline TA of the temperature adjusting working medium flow adjusting pipe group is kept normally open, and the flow of the carbon dioxide working medium passing through the temperature adjusting working medium flow adjusting pipe group is adjusted through the temperature adjusting working medium flow adjusting pipe group TB. And the carbon dioxide working medium at the outlet of the supercritical carbon dioxide boiler 4 enters a turbine 5 to do work to complete circulation.
The system for adjusting the working medium temperature of the supercritical carbon dioxide boiler effectively solves the problem of adjusting the working medium temperature of the supercritical carbon dioxide boiler. Part of carbon dioxide working medium in the closed system is cooled and then directly contacted with high-temperature carbon dioxide working medium for heat exchange, and the low-temperature carbon dioxide working medium entering the temperature regulation point of the supercritical carbon dioxide boiler keeps reasonable temperature and flow, so that the temperature of the working medium of the supercritical carbon dioxide boiler is quickly and flexibly regulated, the overtemperature of the heating surface of the boiler is avoided, the running safety of the system is obviously improved, and the service lives of the high-temperature heating surface, the pipeline and the turbine blade in the system are greatly prolonged.
The embodiment leads out the temperature adjusting bypass through the outlet of the main compressor and cools the temperature adjusting bypass through the cooler, so that the temperature of the temperature adjusting working medium can be kept at a lower level, the flow required in the temperature adjusting process is smaller, and the working medium flow of the main boiler pipeline is prevented from being greatly influenced in the temperature adjusting process.
In the embodiment, the temperature is adjusted by directly mixing the temperature-adjusting carbon dioxide working medium and the high-temperature carbon dioxide working medium, so that the temperature adjusting effect is good, the sensitivity is high, the response is fast, the system is simple, the failure rate is low, and the investment is low.
Meanwhile, the temperature adjusting working medium flow adjusting pipe group is provided with a temperature adjusting working medium flow adjusting pipe group flow pipeline and a temperature adjusting working medium flow adjusting pipe group adjusting pipeline. The flow pipeline of the temperature adjusting working medium flow adjusting pipe group is kept normally open, and the flow of the carbon dioxide temperature adjusting working medium is adjusted through the temperature adjusting working medium flow adjusting pipe group, so that the flow adjusting effect can be achieved, thermal shock of the flow adjusting process to the temperature adjusting pipeline is effectively avoided, and the service life of the temperature adjusting pipeline is greatly prolonged.
Claims (7)
1. The utility model provides a supercritical carbon dioxide boiler working medium temperature governing system which characterized in that, includes supercritical carbon dioxide boiler, turbine, regenerator, cooler, compressor unit spare and temperature regulation working medium flow control nest of tubes, wherein: the inlet of the turbine is connected with the outlet of the supercritical carbon dioxide boiler, the outlet of the turbine is connected with the low-pressure side inlet of the heat regenerator, the low-pressure side outlet of the heat regenerator is connected with the heat release side inlet of the main cooling part in the cooler, and the heat release side outlet of the main cooling part is connected with the inlet of the compressor assembly; the outlet of the main compressor assembly is divided into two paths, one path of outlet is connected with the high-pressure side inlet of the heat regenerator, the high-pressure side outlet of the heat regenerator is connected with the inlet of the supercritical carbon dioxide boiler, the other path of outlet of the main compressor assembly is connected with the inlet of the temperature-adjusting working medium flow adjusting pipe group, the outlet of the temperature-adjusting working medium flow adjusting pipe group is connected with the heat-releasing side inlet of the temperature-adjusting working medium cooling part in the cooler, and the heat-releasing side outlet of the temperature-adjusting working medium cooling part is connected with the temperature-adjusting point of the supercritical carbon dioxide boiler in the supercritical carbon dioxide boiler through the temperature-adjusting.
2. The system of claim 1, wherein the temperature regulating pipe set comprises a flow pipe and a parallel pipe.
3. The system of claim 1, wherein the compressor assembly comprises a main compressor or a cyclic compression circuit comprising at least two compressors.
4. The system for regulating the temperature of the working medium of the supercritical carbon dioxide boiler according to claim 1, wherein the number of the temperature regulating points of the supercritical carbon dioxide boiler is 1 or at least two, and all the temperature regulating points of the supercritical carbon dioxide boiler are connected with the outlet at the heat release side of the cooling part of the temperature regulating working medium through the temperature regulating working medium introducing pipeline.
5. The system for regulating the working medium temperature of the supercritical carbon dioxide boiler according to claim 1, wherein the supercritical carbon dioxide boiler is provided with a heating surface of the supercritical carbon dioxide boiler and/or a reheating heating surface of the supercritical carbon dioxide boiler.
6. The system for regulating the working medium temperature of a supercritical carbon dioxide boiler according to claim 1, wherein the regenerator comprises a low-temperature regenerator and a high-temperature regenerator, wherein a low-pressure side inlet of the high-temperature regenerator is connected with an outlet of the turbine, a low-pressure side outlet of the high-temperature regenerator is connected with a low-pressure side inlet of the low-temperature regenerator, and a low-pressure side outlet of the low-temperature regenerator is connected with a heat-releasing side inlet of a main cooling part in the cooler.
7. The system for regulating the working medium temperature of the supercritical carbon dioxide boiler according to claim 6, further comprising a recompressor, wherein the low-pressure side outlet of the low-temperature regenerator is simultaneously connected to the inlet of the recompressor; and a high-pressure side inlet of the low-temperature heat regenerator is connected with an outlet of the compressor assembly, a working medium flowing out of a high-pressure side outlet of the low-temperature heat regenerator is converged with a working medium flowing out of an outlet of the recompressor and then is connected with a high-pressure side inlet of the high-temperature heat regenerator, and a high-pressure side outlet of the high-temperature heat regenerator is connected with an inlet of the supercritical carbon dioxide boiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201920579503.7U CN210485670U (en) | 2019-04-25 | 2019-04-25 | Supercritical carbon dioxide boiler working medium temperature regulating system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920579503.7U CN210485670U (en) | 2019-04-25 | 2019-04-25 | Supercritical carbon dioxide boiler working medium temperature regulating system |
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| Publication Number | Publication Date |
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| CN210485670U true CN210485670U (en) | 2020-05-08 |
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| CN201920579503.7U Withdrawn - After Issue CN210485670U (en) | 2019-04-25 | 2019-04-25 | Supercritical carbon dioxide boiler working medium temperature regulating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110056851A (en) * | 2019-04-25 | 2019-07-26 | 上海锅炉厂有限公司 | A kind of supercritical carbon dioxide boiler working substance humidity control system and method |
-
2019
- 2019-04-25 CN CN201920579503.7U patent/CN210485670U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110056851A (en) * | 2019-04-25 | 2019-07-26 | 上海锅炉厂有限公司 | A kind of supercritical carbon dioxide boiler working substance humidity control system and method |
| CN110056851B (en) * | 2019-04-25 | 2024-04-26 | 上海锅炉厂有限公司 | Supercritical carbon dioxide boiler working medium temperature adjusting system and method |
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Granted publication date: 20200508 Effective date of abandoning: 20240426 |
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Granted publication date: 20200508 Effective date of abandoning: 20240426 |