节点文献
多级冲击采样器用于电厂飞灰分级采样的探讨
The analysis ofMulti-stage impactor in Classification sampling of Power Plant Fly Ash
【Author】 YUAN Yongtao WEI Yuzhen QI LiQiang (North China Electric Power University,Baoding,Hebei province,071003)
【机构】 华北电力大学；
【摘要】 鉴于日益严格的环保要求,燃煤电厂出口烟道飞灰的分级采样是十分必要的。多级冲击采样器基于惯性冲击原理,可同时对不同粒径范围颗粒进行分级采样,能够对粒径在PM2.5以下的超细颗粒进行分级采样。本文在归纳总结现有烟道飞灰采样现状的同时,对多级冲击采样器的原理,结构以及其中颗粒的运动进行了分析。给出了颗粒运动轨迹方程,各级设计参数与切割粒径、雷诺数Re′和Stokes数之间的数学关系模型,为多级冲击采样器用于电厂飞灰分级采样的优化设计提供借鉴。
【Abstract】 The classification sampling of fly ash in coal-fired power plant is very important. Multi-stage impactor is mainly,based on inertia impact mechanism and is used in particles classification. It can classify particles of 2.5μm or below 2.5μm.In this article,it introduced the present technology of fly ash sampling in stake and then mainly analyzed the mechanism,structure and particle motion of multi-stage impactor.The trajectories of particles were also predicted.And then the mathematical models of the key structural parameters of the impactor and cut-off diameter,Reynolds number,Stokes number was also established by numerical calculation method for its optimal design of being well used in power plant fly ash classification sampling.
【Key words】 fly ash； classified sampling； multi-stage impactor； impact mechanism； cut-off diameter； design parameters；
- 【会议录名称】 第十三届中国电除尘学术会议论文集
- 【会议名称】第十三届中国电除尘学术会议
- 【会议时间】2009-10-20
- 【会议地点】中国山东青岛
- 【分类号】TM621.73
- 【主办单位】中国环境保护产业协会电除尘委员会