Numerical Simulation On The Gas Flow Distribution And Fine Dust Movement Characteristics Of Electric Fabric Precipitator

As a new kind of technology,Electrostatic Fabric Precipitator(EFP)plays an important role in solving the atmospheric pollution problem from industry emission,but it is the key that Studying on air distribution and dust removal efficiency.However there are many problems in the developing EFP now,and the existing research is limited to a single fluid field,and the gas-solid phase flow without electric,ignoring the effect of electric field and particle characteristics on the dust collecting efficiency,which leading practical application restrict by the research results.The paper adopts the method of FLUENT software and COMSOL software to simulate the fluid field,the electric field and the gas-solid phase flow within the EFP,for the Optimization of it's structure,and improvement of dust collecting efficiency to provide calculation basis.In the model,a very complex interactions between the electric field,fluid field and particle dynamics are taken into account.Euler-Lagrange model is used to describe particle-laden flows and the finite element method is used to solve the electric field and particle dynamics.The main research contents include the following several parts:In the first part,flue structure was optimized in the EFP.The results show that when the inlet velocity increased to 18 m/s,the horizontal gas duct length before coagulator increased to 500 m,and three pieces of deflectors were arranged at elbow,the flue gas distribution was uniform.the mean square root values were less than 0.20,which was propitious to improve the removal efficiency.In the second part,the influence of voltage,flow velocity,dust diameter on the trajectory and collection efficiency were studied either.The results indicate that the trajectory and collection efficiency were greatly affected by the voltage,flow velocityand dust diameter,less affected by dust density.The higher voltage,the smaller flow velocity,the larger particle diameter and dust density were conducive to improving the collecting efficiency.At the same time,the numerical results agreed well with the related studies.