磁场作用下烟气流速对静电旋风除尘器收集微粒影响的模拟研究  

Influence of gas velocity on the collection of fine particles in electrostatic cyclone precipitator under magnetic field effect

作　　者：张建平 江泽馨 车鹏 刘银 ZHANG Jianping;JIANG Zexin;CHE Peng;LIU Yin(School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093;College of Energy and Mechanical Engineering,Shanghai University of Electric Power,Shanghai 200090)

机构地区：[1]上海理工大学机械工程学院,上海200093 [2]上海电力大学能源与机械工程学院,上海200090

出　　处：《环境污染与防治》2020年第9期1081-1084,1089,共5页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.11572187);上海市科学技术委员会项目(No.18DZ1202105、No.18DZ1202302)。

摘　　要：为了提高静电旋风除尘器(ECP)中微粒的除尘效率,利用磁场能有效抑制微粒逃逸的机理,将磁场引入ECP中,建立多场耦合作用下的微粒运动数学模型,利用Fluent软件数值模拟了有无磁场环境下烟气流速对微粒逃逸率的影响。结果表明:磁场的引入有效降低了ECP中微粒的逃逸率;低烟气流速更有利于微粒在ECP内的捕集;微粒的除尘效率随着磁感应强度的增加而增大,但这一过程中磁场的贡献量逐步减小。研究结果可为新型ECP的设计提供技术参考。In order to improve the collection efficiency of fine particles in the electrostatic cyclone precipitator(ECP),the magnetic field was introduced into ECP based on the principle that magnetic field could suppress the escape of particles.The influence of flue gas velocity on the collection efficiency of fine particles in the presence or absence of magnetic field was numerically simulated by Fluent software through building a mathematical model under multi-field coupling.The results showed that the introduction of magnetic field effectively reduces the escape rate of fine particles in ECP.The lower flue gas velocity was more conducive to the trapping of submicron particles in ECP.The collection efficiency of fine particles was grew with the increase of magnetic induction intensity,but the contribution of magnetic field decreased gradually in this process.These findings could provide technical reference for the design of novel ECP.

关 键 词：磁场 烟气流速 静电旋风除尘器 微粒 逃逸率 除尘效率 

分 类 号：X701.2[环境科学与工程—环境工程]