Mechanism Research On Improvement Of Charged Particle Collection Efficiency

Nowadays, the industrialization and urbanization process in our country is still in the state of acceleration day by day, environmental pollution appears thereupon. Inhaler dust not only endangers human’s health, but also animals and plants’. As the preferred device as soon as it comes to dedusting, the EBP combines the electrostatic precipitator and the fabric filter their own superiority, especially on collecting fine particles, but people still can’t explain the charged particle movement towards to the surface of filtering bag as well as the mechanism research on collection efficiency improvement. This thesis aims not only enable people get preliminary understanding about the charged particle trajectries from electric area to filtering bag’s surface, and discusses collection mechanism on EBP at same time, but also provides guidance on how to keep air flow uniform distribution in it, which can ensure it works efficiently throughout.This article gives a detailed analysis including charged particle coagulation by using dust-removal and aeroseol mechanics theories, its accumulating regularity and mechanism on filtering bag’s surface, and major influence factors of EBP collection efficiency, exploring the efficiency equation when considering single dust-removal mechanism, obtaining mathematical model by analyzing the charged particle movement process to filtering bag surface based on the Front electric rear bag series EBP. Establishing a simulation model of EBP by using the GAMBIT software, then working out particle trajectories assisting the ANSYS software via the simulation of particle movement circumstance towards the filtering bag surface, and where the accumulation model upon.The results show that, the coagulation between charged particles is more effective than uncharged ones, the charged particles’ accumulation on filtering bag surface are loosened because of the repulsive interaction which is caused by electrostatic induction force while uncharged ones are compact. Each filter-bag, whose capture amount of particles in different type is connected with their density, that’s the reason why they appear in the rear filter-bags more than those which put in the front. Acquiring several couples of filter-bag structure size and inlet velocity which meet the requirement by making analyses for dust flow velocity distribution figure who locates in the filtering bag surface, then judging airflow uniformity with utilizing mathematical method after importing their concrete numerical value to EXCEL.It can provide theoretical reference for both studying on how to keep high efficiency or type selection of EBP and judging airflow uniformity in it, by analyzing the main influence factors of charged particle collection efficiency, simulating airflow velocity distribution on filter-bag surface in EBP combines related software with mathematical methods, arriving at the best parameter of filter bag which can make EBP has the best collecting performance, it is 5m long, 2m wide, 9 filtering bags,0.4m/s of inlet velocity and distribute like "333".