Theoretical study on submicron particle escape reduced by magnetic confinement effect in low inlet speed electrostatic cyclone precipitators

Abstract Based on the idea of suppressing submicron particle escape effectively by applying magnetic field, we propose a novel model design of outer vortex electrostatic cyclone precipitator (ECP) and establish a theoretical model under four-field coupling interaction. The influences of temperature and working voltage on the escape rate of submicron particles with or without magnetic confinement effect are subsequently evaluated. The results indicate that magnetic confinement effect can availably reduce submicron particle escape in ECP. Whether magnetic field exists or not, high working voltage and low temperature are more favorable to confine submicron particles to collection wall surface, however, the increasing effect of low working voltage on the trapping performance is bigger, and the weakening effect of temperature under magnetic confinement effect is smaller than that under non magnetic field. At a certain working voltage or temperature, the enhancing effect of magnetic field on collection efficiency progressively decreases with the increasing magnetic flux density, and the smaller the magnetic flux density is, the stronger the ability of magnetic confinement becomes. The research results provide assistance for designing newly effective ECP and applying magnetic confinement technique to reduce submicron particle escape in industrial applications.