Study of PM2.5 capture performance in a new wire-cylinder ESP with applied magnetic field

ABSTRACT

To enhance PM_2.5 capture performance of a wire-cylinder electrostatic precipitator (ESP), magnetic field was introduced into ESP, and a mathematical model with multi-field coupling effect between gas flow field, electromagnetic field, and particle dynamical field was built. PM_2.5 collection efficiency in ESP was simulated using computational fluid dynamics and Fluent software. Under the consideration of diffusion charge, the influence of applied magnetic field on PM_2.5 collection efficiency at different working voltages and flue gas velocities was discussed. The research results indicate that no matter what operating parameters, the introduction of magnetic field obviously improves the capture performance of wire-cylinder ESP. The PM_2.5 capture performance in magnetic field environment is better in the condition of higher working voltage and/or lower flue gas velocity. Furthermore, the capture effect of applied magnetic field on PM_2.5 increases with the increase of flue gas velocity or the decrease of working voltage. The related results can provide references for researchers aiming at equipment modification and technological innovation of traditional ESP.