1000 MW燃煤机组尾部烟道全流程流场优化  

Optimization for the Whole Process Flow Field of Rear Gas Flue in a Coal-Fired Unit

作　　者：赵子斌 陈城 李荣春 李剑宁 Zhao Zibin;Chen Cheng;Li Rongchun;Li Jianning(State Power Investment Group GCL Binhai Power Generation Co.,Ltd.,Yancheng 224500,Jiangsu Province,China;State Power Investment Group Jiangsu Electric Power Co.,Ltd.,Nanjing 224500,China;Shanghai Power Equipment Research Institute Co.,Ltd.,Shanghai 200240,China)

机构地区：[1]国家电投集团协鑫滨海发电有限公司,江苏盐城224500 [2]国家电投集团江苏电力有限公司,南京224500 [3]上海发电设备成套设计研究院有限责任公司,上海200240

出　　处：《发电设备》2023年第2期75-81,共7页Power Equipment

摘　　要：为进一步挖掘燃煤机组风烟系统节能潜力,利用数值模拟方法,对包括空气预热器出口至电除尘器入口、电除尘器入口至引风机入口、引风机出口至脱硫塔入口在内的尾部烟道全流程流场进行分析及优化,并且将模拟结果与工程应用结果进行对比。结果表明:模拟优化后,尾部烟道系统阻力下降205 Pa,各低温省煤器通道截面速度偏差均小于20%。模拟结果与工程应用结果较为吻合,所提出的大型燃煤机组烟道流场优化及节能耦合技术方案可提升机组运行的安全性和经济性。To further explore the energy-saving potential of the air flue system in coal-fired units, an analysis and optimization was conducted on the whole process flow field including following parts of the rear gas flue in a coal-fired unit based on numerical simulation, such as the outlet of the air preheater to the inlet of the electrostatic precipitator, the inlet of the electrostatic precipitator to the inlet of the induced draft fan, and the outlet of the induced draft fan to the inlet of the desulfurization tower. While the simulation results and the engineering application results were compared. Results show, after the simulation optimization, the resistance of the rear gas flue system is reduced by 205 Pa, the flue gas velocity deviation of each economizer is less than 20%. The simulation results are in good agreement with the engineering application results. The safety and economy of the unit operation can be improved by adopting the proposed flue flow field optimization and energy-saving coupling technical scheme for large coal-fired units.

关 键 词：燃煤机组 烟道 阻力 省煤器 引风机 

分 类 号：TM621[电气工程—电力系统及自动化]