锅炉风机风道声学共振的机理与处理实例  

Resonance Mechanism of Boiler Fan Channel and Examples of Treatment

作　　者：张海涛 常强 王赫 邱长伟 ZHANG Hai-tao;CHANG Qiang;WANG He(Guodian Science and Technology Research Institute Co.,Ltd;Guodian Kangping Power Plant Co.,Ltd.)

机构地区：[1]国电科学技术研究院有限公司,江苏南京210046 [2]国电康平发电有限公司

出　　处：《电站系统工程》2020年第3期11-13,共3页Power System Engineering

摘　　要：在锅炉一次风机出口加装暖风器、引风机出口加装低温省煤器等改造中,如设计不当,易引发声学振动。对锅炉风机风道声学共振产生的机理进行了分析,给出了卡门涡流频率与声学驻波频率的计算方法与声学共振的解决方案。结合某600 MW机组一次风机加装暖风器引发的声学共振的处理实例,为处理类似问题时提供了理论依据与借鉴办法。If improper design of heater at the outlet of primary fan or low temperature economizer at the outlet of induced draft fan exists, it is easy to cause acoustic vibration. The mechanism of acoustic resonance in boiler fan channel is analyzed. The calculation method of Karman eddy current frequency and acoustic standing wave frequency and the solution of acoustic resonance are given. Combining with an example of acoustic resonance caused by adding heater to primary fan of a 600 MW unit, a theoretical basis and reference method is provided for dealing with similar problems.

关 键 词：锅炉风道 声学共振 卡门涡流 声学驻波 暖风器 

分 类 号：TK223[动力工程及工程热物理—动力机械及工程]