脱硫塔出口尾部烟道振动的原因分析与治理技术  

Cause Analysis and Treatment Technology of Tail Flue Vibration at the Exit of Desulfurization Tower

作　　者：余仙敏 YU Xianmin(Beijing Chinsuny Environmental Protection Technology Co.,Ltd.,Beijing 102200,China)

机构地区：[1]北京青山绿野环保科技有限公司,北京102200

出　　处：《电力与能源》2023年第3期282-286,共5页Power & Energy

摘　　要：针对供热锅炉超低排放改造后脱硫塔出口尾部烟道出现的振动和噪声问题,首先对尾部烟道的振动进行了现场测试分析,然后对烟道内烟气流动情况进行了仿真计算分析,从理论上分析了尾部烟道产生振动的机理。现场振动测试和理论计算分析表明:尾部烟道振动的原因是冷凝器段烟道的声驻波频率与烟道结构的局部固有频率发生耦合共振,冷凝器前后异形弯头使得烟气流动产生涡流,导致流-固-声耦合共振,当涡流扰动能量达到一定程度时就会产生严重的振动并发出巨大噪声。据此制定了在尾部烟道增加垂直隔离板的振动治理方案,实施结果表明:该方案有效消除了耦合共振,彻底解决了尾部烟道的振动和噪声问题。In view of the vibration and noise problems in the desulfurization tower tail flue after the ultra-low emission transformation of heating boiler,the vibration of the tail flue was firstly tested and analyzed in the field,then the flue gas flow in the flue was simulated and analyzed,and the vibration mechanism of the tail flue was theoretically analyzed.The field vibration test and theoretical calculation analysis showed that the vibration of the tail flue was caused by the coupling resonance between the acoustic standing wave frequency of the flue in the condenser section and the local natural frequency of the flue structure.The irregular elbows in front and back of the condenser made the flue gas flow generate eddy current,leading to the fluid-solid-acoustic coupling resonance.When the eddy current disturbance energy reached a certain level,serious vibration and loud noise would be produced.Accordingly,a vibration control scheme of adding vertical isolation plate in the tail flue was developed.The application results showed that the coupling resonance was eliminated and the vibration and noise of the tail flue were completely solved.

关 键 词：脱硫塔 冷凝器 尾部烟道 耦合共振 

分 类 号：TM621[电气工程—电力系统及自动化]