磁场环境下工作电压对线板式静电除尘器中同种颗粒除尘效率的影响

Influence of Working Voltage on Collection Efficiency for the Same Particle in a Wire-plate Electrostatic Precipitator under Magnetic Field Environment

为了提升线板式静电除尘器(electrostatic precipitator,ESP)的除尘性能,利用Gambit软件构建了ESP网格模型,结合磁场能降低颗粒逃逸率的机理,将磁场引入到ESP中,模拟了同种颗粒的运动轨迹,计算并对比了不同工作电压下的除尘效率。结果表明:磁场的引入可有效提升线板式ESP对同种颗粒的捕集性能,且在低工作电压时更为显著;同一磁场环境下,工作电压对颗粒除尘效率的提升能力由强变弱;随着磁感应强度的增大,颗粒逃逸的数量不断减少,但磁场的相对贡献逐步减小。

In order to improve the dust removal performance of wire-plate electrostatic precipitator( ESP),a grid model was established by Gambit software. Combined with the mechanism that magnetic field can reduce the escape rate of particles,magnetic field was introduced into ESP to simulate the trajectory of the same kind of particles,and the collection efficiency under different working voltages was calculated and compared. The results show that the introduction of magnetic field effectively improves the trapping performance of the same particles in a wireplate ESP,especially at low operating voltage. Under the same magnetic field environment,the increasing ability of working voltage to the collection efficiency of particles changes from strong to weak. With the increase of magnetic induction intensity,the number of escaped particles reduces constantly,but the relative contribution of magnetic field decreases gradually.