电站煤粉锅炉分隔屏过热器磨损特性数值试验研究及运行优化  

Numerical Experimental Study and Operation Optimization on Wear Characteristics of Division Panel Superheater of Pulverized-coal Boilers

作　　者：葛闯 钟文琪[1] 周冠文 陈曦[1] 石建良 刘彦新 黄国顺 GE Chuang;ZHONG Wenqi;ZHOU Guanwen;CHEN Xi;SHI Jianliang;LIU Yanxin;HUANG Guoshun(State Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education(Southeast University),Nanjing 210096,Jiangsu Province,China;Guodian Chengde Thermal Power Co.,Ltd.,Chengde 067000,Hebei Province,China)

机构地区：[1]能源热转换及其过程测控教育部重点实验室(东南大学),江苏省南京市210096 [2]国电承德热电有限责任公司,河北省承德市067000

出　　处：《中国电机工程学报》2021年第23期8057-8066,共10页Proceedings of the CSEE

基　　金：国家重点研发计划项目(2017YFB0601802);国家自然科学基金重大项目(51390492)。

摘　　要：为掌握煤粉锅炉分隔屏过热器的磨损特性,实现其防磨损运行优化,分别构建330MW煤粉锅炉整体模型及其分隔屏管道全尺寸精细模型,以获得在不同运行参数(锅炉负荷、燃烧器及分离燃尽风竖直摆角和磨煤机运行状况)下分隔屏管道磨损速率及磨损区域分布等信息。结果表明,分隔屏弯管处磨损速率要远高于直管,且易磨损区域呈点状分布,而直管上呈条块状分布;锅炉负荷对分隔屏磨损程度影响最为敏感,在中高负荷范围,负荷每增加5%分隔屏最大磨损速率增加超过28%;分隔屏最大磨损速率随燃烧器及燃尽风竖直摆角增大而增大,且燃尽风摆角影响程度相对较高;运行4台磨煤机时,磨煤机运行状况所引起分隔屏最大磨损速率的变化幅度在10%以内,且要优于同负荷下5台磨全开的工况。To grasp the wear characteristics of division panel superheater of pulverized-coal boilers and realize the operating optimization of its wear-reducing,integral model of the 330MW pulverized-coal boiler and fine full-scale model of division panel superheater were constructed in this paper to obtain the wear rate and wear area distribution of the pipes of division panel superheater under different operating parameters(boiler load,the vertical swing angle of burner and separate over fire air,the operating condition of coal mills).The results show that wear rate of the elbow of division panel superheater is much higher than that of the straight pipe,and the wear-prone areas are distributed in dots,while the straight pipe is distributed in blocks;the boiler load is the most sensitive to the degree of wear of division panel superheater,in the medium and high load range,the maximum wear rate of partition screen increases by more than 28%for every 5%increase in load;the maximum wear rate of division panel superheater increases with the increase of the vertical swing angle of burner and over fire air,and the effect of the over fire air is relatively high.When running four coal mills,the maximum wear rate of division panel caused by the operating condition of coal mills is within 10%,and it is better than the five coal mills fully operated under the same load.

关 键 词：分隔屏过热器 磨损特性 运行优化 数值模拟 运行参数 

分 类 号：TM85[电气工程—高电压与绝缘技术]