影响涡旋型电除尘器离子产生浓度的因素分析  

Analysis on Influencing Factors of the Ion Produced Concentration of Vortex Electrostatic Precipitator

作　　者：陆从相[1,2] 依成武[1] 王晶[1] 依蓉婕 崔苗[1] 

机构地区：[1]江苏大学环境与安全工程学院,江苏镇江212013 [2]盐城工业职业技术学院机电工程学院,江苏盐城224005

出　　处：《工业安全与环保》2017年第4期48-51,55,共5页Industrial Safety and Environmental Protection

基　　金：国家自然科学基金(51278229);江苏省六大人才峰会基金项目(JNHB-018)

摘　　要：通过回归正交设计,建立涡旋型电除尘器电场中的离子浓度n_e与放电电压U、电场风速v_0和同排极板空隙距离D这3个因素之间的函数关系式。通过编程求解回归模型,获得离子浓度较高的优化结果:当U为17.8 k V,v_0为3 m/s,D为40 mm时,n_e可达6.97×10~9个/cm^3以上。根据粒子成像测速法,可以得出放电极附近的风速约为v_0的2.5倍以上。通过收尘试验可知,对于粉尘粒径小于15μm的微细粉尘,涡旋型电除尘器收尘效率可达到90.2%。The function relation between the ion concentration ne and the three factors--the discharge voltage U, field velocity v0 and the collecting electrode spacing D is established by orthogonal design. It has been optimized by programming, and the final optimizing result is as follows： when U and v0 is 17.8 kV and 3 m/s respectively and D is 40 mm, ne can remain above 6.97 ×10^9 per cm3 . After determining and analyzing the state of internal flow field within VEP by particle image velocimetry （PIV）, the results show that, the gas velocity near the discharge electrode is as 2.5 times as that at the average gas velocity at the entrance. The experiment also shows that, when the particle diameter is less than 15 μm, the collecting efficiency of fine particles can reach 90.2%.

关 键 词：涡旋型电除尘器 微细粉尘 离子浓度 回归方程 风速 收尘效率 

分 类 号：X773[环境科学与工程—环境工程]