Multifield modeling of particle dynamics in an electrostatic precipitator equipped with pointed-end arista on corona

Abstract Electrostatic precipitator (ESP) is widely applied in dust removal of fine particulates. An multi-field coupling model of ESP is summed up, which equipped with pointed-end arista on corona. First, a computation work is carried out prior to compare the separation performance of two kinds of electrodes, and the result obviously shows that arista electrode performs better. Then, the adopted corona is installed in a honeycomb test section for measurement. Influences of EHD flow, supply voltage, gas velocity and particle diameter upon separation efficiency are investigated in detail both in computation and measurement. The result implies that separation increase linearly with enhancing supply voltage ranges from 10 kV to 50 kV and particle diameter ranges from 1 μm to 5 μm. When particle diameter is larger than 5 μm, separation efficiency is up to nearly 100% and barely affected. EHD flow has an significant positive influence on particle motion for particulates smaller than 5 μm in low gas velocity. Whereas separation efficiency drops with the rising gas velocity.