Enhancing the capturing characteristics of charged droplets on submicron particles: An experimental and numerical investigation

Abstract

Charged water mist dust removal, combined electrostatic dust removal and wet dust removal, has low energy consumption and high capturing efficiency. Particle motion laws under turbulent flow are investigated. The theoretical model of droplet capturing submicron particles is established, and the kinetic process of submicron particles is analyzed. Considering that the actual conditions of the droplet capturing process is a combination of multiple capturing mechanisms, to better fit the actual engineering cases, an experimental platform is built to study the particle capturing characteristics of droplet under different operating conditions. The motion and deposition behavior of submicron particles relative to single droplet are investigated using COMSOL simulations to reveal the influence laws of relevant parameters. The results show that: the higher the temperature difference, the stronger the charging field, the fewer the escaping particles, and the greater the particle deposition efficiency. The particle capturing efficiency under combined action increases 20% compared to temperature alone and increases 24% compared to electrostatics alone. Also, the particle deposition efficiency under combined action increases 30% to 40% compared to temperature alone and increases 10% to 20% compared to electrostatics alone. The deposition efficiency under combined action is higher than the sum, up to 89%.