Highly effective removal of PM2.5 from combustion products: An application of integrated two-stage electrostatic precipitator

Abstract

In this work, an integrated two-stage electrostatic precipitator (ESP) is developed to efficiently remove PM2.5 based on actual demand for air purification. It includes a power supply module, a charging module, a collection module, and a fan module. In the application test, the typical PM2.5, from the indoor combustion of mosquito coil, was selected as the removal target. At the same time, influence factors related to the developed prototype in the application which includes collector channel, gas velocity, Z-direction position, and collector electric field were investigated systematically with the CFD numerical simulation method. Notably, the collection efficiency of the two-stage ESP prototype for PM2.5 can be up to more than 99% at 3 m/s gas velocity, even in 4 m/s gas velocity, it can also reach more than 98%, which proved the application feasibility of the device. Moreover, the issue of the collector's efficiency limitation is also analyzed in-depth, which provides guidance and suggestions for the secondary entrainment suppression and application strategies in different places after compared with the air quality guidelines (AQG).