Simulation Analysis And Optimization Design Of The Influence Factors Affecting Collection Efficiency Of Electrostatic Precipitator

With the development of the industry,the dust particle emissions have brought serious environmental problems,threatening health of human and ecological environment.In order to deal with this problem,industrial emission standards set by countries around the world have become increasingly stringent.How to improve electrostatic precipitator(ESP)collection efficiency and how to reduce dust emissions have become the focus of the research in this field.ESP collection efficiency is affected by many factors.The experimental research on many factors affecting the mechanism has high cost,needs long experimental period and was restrained by equipment and environment.So simulation analysis is a shortcut to solve it.First,this paper uses FLUENT software to build a numerical simulation model,simulating the ESP dust collecting process and dust-particle trajectory.Selecting dust particle diameter,line panel voltage,air velocity,line panel spacing,discharge-electrode spacing and dust collecting plate length,six main factors to analyze,discussing the mechanism of the six factors that affect the collection efficiency and the reasonable value range.The simulation results show that collection efficiency increases with the increasing line panel voltage,decreases with the increasing air velocity,increases with the increase of dust particle diameter,decreases with the increasing discharge-electrode spacing,increases with the increasing dust collecting plate length,and decreases with the increasing line plate spacing.Dust-particle trajectory is also consistent with the collection efficiency.Dust particle corresponded to lower collection efficiency has a smaller offset in the direction of dust collecting plate,while dust particle corresponded to higher collection efficiency has a bigger offset in the direction of collecting plate.Then with dust collection efficiency as an index,6 factors 5 levels of simulation analysis was conducted according to the L25(56)orthogonal table and numerical simulation model,getting impact that factors,in the reasonable value range of various factors,have on collection efficiency and prioritization scheme to dust collection efficiency.Optimization orthogonal experiment simulation results show that the order of the influence of collection efficiency is voltage,line panel spacing,dust collecting plate length,discharge-electrode spacing,air velocity,particle diameter.And can obtain multiple optimization schemes.Finally,reference to the level of the parameter value and industrial application conditions,a plate ESP is designed satisfying certain requirements.The results of these numerical simulations have guiding sense to improve collection efficiency in parameter settings and structural optimization in industrial application conditions.