燃煤机组烟气余热及水回收系统变工况特性和调控策略

doi:10.11930/j.issn.1004-9649.202011075

中国电力 ›› 2022, Vol. 55 ›› Issue (4): 214-220.DOI: 10.11930/j.issn.1004-9649.202011075

燃煤机组烟气余热及水回收系统变工况特性和调控策略

张国柱¹, 张钧泰¹, 文钰¹, 杨凯旋², 刘明², 刘继平²

1. 大唐环境产业集团股份有限公司，北京 100097;
2. 西安交通大学动力工程多相流国家重点实验室，陕西西安 710049

收稿日期:2020-11-20 修回日期:2021-06-25 出版日期:2022-04-28 发布日期:2022-04-24
作者简介:张国柱（1983—），男，硕士，高级工程师（教授级），从事火电厂节能减排方面的研究，E-mail：zgzwjn@163.com;张钧泰（1983—），男，硕士，工程师，从事热能动力系统节能研究，E-mail： zhangjt@dteg.com.cn;文钰（1992—），女，博士，从事工业节能研究，E-mail：weny@dteg.com.cn;杨凯旋（1996—），男，硕士研究生，从事热力系统节能研究，E-mail：18691450267@163.com;刘明（1985—），男，通信作者，博士，教授，从事热力系统节能与控制研究，E-mail：ming.liu@mail.xjtu.edu.cn;刘继平（1971—），男，博士，教授，从事火电行业的节能减排及能源高效利用研究，E-mail：liujp@mail.xjtu.edu.cn
基金资助:
国家重点研发计划资助项目（2018YFB0604303）

Study on Off-design Condition Characteristics and Control Strategy of Fluegas Waste Heat and Water Recovery System of Coal-Fired Power Plants

ZHANG Guozhu¹, ZHANG Juntai¹, WEN Yu¹, YANG Kaixuan², LIU Ming², LIU Jiping²

1. Datang Environment Industry Group Co., Ltd., Beijing 100097, China;
2. State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China

Received:2020-11-20 Revised:2021-06-25 Online:2022-04-28 Published:2022-04-24
Supported by:
This work is supported by National Key R&D Program of China (No. 2018 YFB0604303)

摘要/Abstract

摘要： 针对燃煤机组烟气余热及水回收系统展开研究，基于物质、能量平衡以及等效热降法分析了系统的节水节煤能力，进而建立了系统变工况分析模型，研究了环境温度和调控策略对系统性能及状态参数的影响规律。结果表明，设计工况下系统节水潜力为15.34 kg/s，节能潜力为2.75 g/(kW·h)。环境温度变化时，系统的部分状态点温度会随着环境温度降低而降低，环境温度为−20℃时，低温省煤器节煤量降至1.44 g/(kW·h)。为避免系统发生低温腐蚀，提出了运行调控策略，使进入电除尘器烟气温度提升至90℃以上，以保证系统的安全运行，但低温省煤器的节煤量相比于未调整时降低了0.2 g/(kW·h)。

关键词: 燃煤机组, 水回收, 余热回收, 变工况, 调控策略

Abstract: 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).

Key words: coal-fired power plants, water recovery, waste heat recovery, off-design condition, control strategy

张国柱, 张钧泰, 文钰, 杨凯旋, 刘明, 刘继平. 燃煤机组烟气余热及水回收系统变工况特性和调控策略[J]. 中国电力, 2022, 55(4): 214-220.

ZHANG Guozhu, ZHANG Juntai, WEN Yu, YANG Kaixuan, LIU Ming, LIU Jiping. Study on Off-design Condition Characteristics and Control Strategy of Fluegas Waste Heat and Water Recovery System of Coal-Fired Power Plants[J]. Electric Power, 2022, 55(4): 214-220.

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燃煤机组烟气余热及水回收系统变工况特性和调控策略

Study on Off-design Condition Characteristics and Control Strategy of Fluegas Waste Heat and Water Recovery System of Coal-Fired Power Plants

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燃煤机组烟气余热及水回收系统变工况特性和调控策略

Study on Off-design Condition Characteristics and Control Strategy of Fluegas Waste Heat and Water Recovery System of Coal-Fired Power Plants

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