摘要
国内多个350 MW超临界等级循环流化床锅炉反馈尾部烟道均出现不同程度的振动。振动发生时,尾部烟道及一定范围内的烟道刚性梁、锅炉平台等均有明显振动,并伴随有低沉的嗡鸣声音。长期频繁振动会造成尾部受热面管排金属疲劳失效,导致受热面泄漏引起机组非停,甚至可能造成安全隐患。以某350 MW超临界循环流化床锅炉为例,结合该项目烟道本身的结构特性和声学特性对烟道系统内振动情况进行分析,找出振动产生的原因并制定相应的改造方案,为其他锅炉尾部烟道系统振动改造提供经验。
At present,there are different degrees of vibration in the tail flue of several 350 MW supercritical circulating fluidized bed boilers.When vibration occurs,there is significant vibration in the tail flue,including the rigid beam of the flue,boiler platform,etc.,accompanied by a low buzzing sound.Long-term frequent vibration can cause fatigue failure of the metal in the tail heating surface tube row,leading to leakage of the heating surface and causing unscheduled downtime of the unit,which may even cause safety hazards.This article will take a 350 MW supercritical circulating fluidized bed boiler as an example,analyze the vibration situation inside the flue system based on the structural and acoustic characteristics of the flue itself,identify the causes of vibration,and formulate corresponding renovation plans,provide some experience for the vibration renovation of other boiler tail flue systems.
作者
芦志祥
向阳
吴相朝
梁红伟
任燕丽
苏虎
鲁佳易
LU Zhixiang;XIANG Yang;WU Xiangchao;LIANG Hongwei;REN Yanli;SU Hu;LU Jiayi(Clean Combustion and Flue Gas Purification Key Laboratory of Sichuan Province,Chengdu 611731,China;Dongfang Boiler Co.,Ltd.,Zigong 643001,China)
出处
《技术与市场》
2024年第6期35-40,共6页
Technology and Market
关键词
超临界
循环流化床
尾部烟道
振动
supercritical
circulating fluidized bed
tail flue
vibration
