The distribution and movement characteristics of fine particles in an electrostatic precipitator with multi-field synergy

Abstract

An experimental platform was established to study the distribution and motion characteristics of fine particles in an electrostatic precipitator (ESP) with electric, temperature, and particle concentration, multi-field synergistic effect. The fine particle concentrations were tested by measuring reformed ELPI in real-time. For discussion, motion characteristics of fine particles such as trajectory, deposition, re-entrainment and water flushing were analyzed by mechanical modeling, listing up every force acting on the fine particles. The results show that the type and the force order of magnitude of the particle will change correspondingly in different states. The synergistic state is beneficial to the removal of particles in the whole range, especially the particle size of 0.1⁓1 μm, and the maximum removal rate is increased by 15% compared with the wet state. The increasing of Fy (liquid bridge), Fc (particle concentration gradient) and Fth (thermophoresis). increase the removal efficiency of fine particles in synergistic state. • The removal efficiency of 0.1-1 μm particles is the most obvious by synergy effect. • The synergistic fields increase the force of near-wall particles towards the wall. • The root reason of high removal efficiency in synergistic: F y , F C and F th increases. • The multi-field synergy provides a new development direction for ESP.