Numerical Simulation Of The Influence Of Electrode Configuration And Flue Gas Conditions On The Performance Of Electrostatic Precipitator

In recent years,the solution to the problem of environmental pollution is a hot topic,especially the atmospheric problem has been paid more and more attention.In all kinds of flue gas treatment technology,ESP has been playing an important role.In order to meet the increasingly strict flue gas emission standards,domestic scholars have carried out a large number of upgrading and transformation plans for esp.However,the performance of electrostatic precipitator is affected by many factors.The experimental research method is not only costly and time-consuming,but also constrained by equipment and environment.Numerical simulation analysis is a shortcut to solve this problem.In this paper,four influencing factors of electrode configuration and flue gas conditions,such as plate spacing,discharge electrode shape,flue gas velocity and temperature,are simulated.Firstly,the user-defined function(UDF)in Fluent is used to couple the electric field,flow field,particle motion field and temperature field in the electrostatic precipitator,and the three-dimensional model of the electrostatic precipitator with V-shaped wires and ZT plate as discharge electrode and dust collector is established.After verifying the correctness of the numerical simulation results,this paper discusses the law of these four factors on the current field and particle movement in the electrostatic precipitator,and analyzes the influence of each factor on the ESP efficiency in detail.The results show that:(1)when the distance between the plates is fixed,the four different corona wires,V0 wire,V15 wire,V25 wire and V40 wire,increase with the increase of the length of the prick of the corona wire,the field strength in the electric field area,the average value of the current density on the surface of the plate and the dust removal efficiency,but the uniformity of the current density distribution on the plate of V25 wire is the best.(2)When the plate spacing increases,the average field strength and the average plate current density in the electric field area decrease gradually,but the distribution of the plate current density is more uniform.In addition,the dedusting efficiency of electrostatic precipitator also decreases with the increase of plate spacing.(3)When the inlet mass flow rate is the same,the lower the temperature,the smaller the flow rate and the smaller the average turbulence intensity;when the mass flow rate at the inlet is same,the velocity at low temperature is small,and the average turbulence intensity is greater;at low temperature,the breakdown voltage,working voltage range,average field strength and ion charge density of ESP increase,but the influence of ion wind on the main flow is smaller and smaller with the increase of temperature,;when tvolume flow rate is same,the decrease of temperature,the high operating voltage,the large particle charge,the small gas viscosity and the low interaction between particles and gas increase the dust removal efficiency.In addition,the high temperature has a stronger inhibitory effect on the collection efficiency of large particles than that of small particles.