Experimental and numerical study on the acoustic coagulation of charged particles

Abstract

Coagulation technology is widely used as a dust removal technology pre-treatment. The mechanism of particle coagulation and charging under the coupling of the electric field and the acoustic field is investigated in this paper. The movement law of the acoustic field waveform, sound pressure level and acoustic field flow rate parameters on the particles are analyzed numerically using COMSOL Multiphysics software, and the operating parameters for the best coagulation effect of charged particles are obtained through experimental studies. The results show that the higher the supply voltage, the more the particles are charged and the better the particle coagulation effect. The higher the sound pressure level, the better the particle coagulation effect. The acoustic frequency is not linearly related to the particle coagulation efficiency. An optimal operating parameter is obtained. The acoustic and electric field coupling resulted in a particle reduction rate of 0.62 and a significant particle coagulation effect. • The mechanism of particle coagulation under the coupling effect of acoustic and electric fields is studied. • The effect of different acoustic field parameters on the particle motion pattern in the furnace is simulated. • The optimal acoustic field parameters are obtained. • The particle reduction rate reaches 0.62.