Study on Off-design Condition Characteristics and Control Strategy of Fluegas Waste Heat and Water Recovery System of Coal-Fired Power Plants
A fluegas waste heat and water recovery system for the coal-fired power plant is studied in this paper. Based on the material, energy balance and equivalent heat drop method, the water-saving and coal-saving capacity of the system were calculated. Off-design models of the system were developed, infl...
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| Format: | Article |
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State Grid Energy Research Institute
2022-04-01
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| Series: | Zhongguo dianli |
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| Online Access: | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202011075 |
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| author | Guozhu ZHANG Juntai ZHANG Yu WEN Kaixuan YANG Ming LIU Jiping LIU |
| author_facet | Guozhu ZHANG Juntai ZHANG Yu WEN Kaixuan YANG Ming LIU Jiping LIU |
| author_sort | Guozhu ZHANG |
| collection | DOAJ |
| description | A fluegas waste heat and water recovery system for the coal-fired power plant is studied in this paper. Based on the material, energy balance and equivalent heat drop method, the water-saving and coal-saving capacity of the system were calculated. Off-design models of the system were developed, influences of environmental temperature and control strategy on system performance and state parameters were evaluated. Results show that the water-saving potential of the system is 15.34 kg/s under the design condition, and the energy-saving potential is 2.75 g/(kW·h). When the ambient temperature changes, the temperature of some state points of the system will decrease with the ambient temperature. The coal saving of the low-temperature economizer will be reduced to 1.44 g/(kW·h) when the ambient temperature is –20°C. To prevent low-temperature corrosion of the system, the operation strategy was proposed, the fluegas temperature entering the electrostatic precipitator is increased to 90°C, which can ensure the safe operation of the system. However, the coal saving of the low-temperature economizer is lower than that of the unadjusted by 0.2 g/(kW·h). |
| format | Article |
| id | doaj-art-018a342e91b447258bbb30079c0ce57b |
| institution | DOAJ |
| issn | 1004-9649 |
| language | zho |
| publishDate | 2022-04-01 |
| publisher | State Grid Energy Research Institute |
| record_format | Article |
| series | Zhongguo dianli |
| spelling | doaj-art-018a342e91b447258bbb30079c0ce57b2025-08-20T02:52:24ZzhoState Grid Energy Research InstituteZhongguo dianli1004-96492022-04-0155421422010.11930/j.issn.1004-9649.202011075zgdl-55-4-zhangguozhuStudy on Off-design Condition Characteristics and Control Strategy of Fluegas Waste Heat and Water Recovery System of Coal-Fired Power PlantsGuozhu ZHANG0Juntai ZHANG1Yu WEN2Kaixuan YANG3Ming LIU4Jiping LIU5Datang Environment Industry Group Co., Ltd., Beijing 100097, ChinaDatang Environment Industry Group Co., Ltd., Beijing 100097, ChinaDatang Environment Industry Group Co., Ltd., Beijing 100097, ChinaState Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, ChinaState Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, ChinaState Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, ChinaA fluegas waste heat and water recovery system for the coal-fired power plant is studied in this paper. Based on the material, energy balance and equivalent heat drop method, the water-saving and coal-saving capacity of the system were calculated. Off-design models of the system were developed, influences of environmental temperature and control strategy on system performance and state parameters were evaluated. Results show that the water-saving potential of the system is 15.34 kg/s under the design condition, and the energy-saving potential is 2.75 g/(kW·h). When the ambient temperature changes, the temperature of some state points of the system will decrease with the ambient temperature. The coal saving of the low-temperature economizer will be reduced to 1.44 g/(kW·h) when the ambient temperature is –20°C. To prevent low-temperature corrosion of the system, the operation strategy was proposed, the fluegas temperature entering the electrostatic precipitator is increased to 90°C, which can ensure the safe operation of the system. However, the coal saving of the low-temperature economizer is lower than that of the unadjusted by 0.2 g/(kW·h).https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202011075coal-fired power plantswater recoverywaste heat recoveryoff-design conditioncontrol strategy |
| spellingShingle | Guozhu ZHANG Juntai ZHANG Yu WEN Kaixuan YANG Ming LIU Jiping LIU Study on Off-design Condition Characteristics and Control Strategy of Fluegas Waste Heat and Water Recovery System of Coal-Fired Power Plants Zhongguo dianli coal-fired power plants water recovery waste heat recovery off-design condition control strategy |
| title | Study on Off-design Condition Characteristics and Control Strategy of Fluegas Waste Heat and Water Recovery System of Coal-Fired Power Plants |
| title_full | Study on Off-design Condition Characteristics and Control Strategy of Fluegas Waste Heat and Water Recovery System of Coal-Fired Power Plants |
| title_fullStr | Study on Off-design Condition Characteristics and Control Strategy of Fluegas Waste Heat and Water Recovery System of Coal-Fired Power Plants |
| title_full_unstemmed | Study on Off-design Condition Characteristics and Control Strategy of Fluegas Waste Heat and Water Recovery System of Coal-Fired Power Plants |
| title_short | Study on Off-design Condition Characteristics and Control Strategy of Fluegas Waste Heat and Water Recovery System of Coal-Fired Power Plants |
| title_sort | study on off design condition characteristics and control strategy of fluegas waste heat and water recovery system of coal fired power plants |
| topic | coal-fired power plants water recovery waste heat recovery off-design condition control strategy |
| url | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202011075 |
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