Numerical Simulation Study On Spray Charged Vibrating Wire Grid

With the rapid development of industrial technology and the increasing scale of industry,the threat of air pollution to the health of the people is becoming more and more prominent,such as Haze Pollution,the concept of "green development strategy" proposed by the state has been deeply rooted in the hearts of the people.Among them,the research on how to get better purify the fine dust(The Particle size is less than 2.5 μ m)in the atmosphere has become a hot topic for researchers to study the harm and the difficulty of cleaning up the air pollution caused by the fine dust,such as the Haze Pollution.This Paper based on the experimental study of the spray charged vibrating wire grid and the optimum distribution of the filter Part of the spillway string grating,combined the simulation technology of the more mature Fluent computer software,analyzed the dedusting process of the dust removal of the spillway string grating.The whole flow process was described by established a control equation group and a turbulence model,the discrete method based on the solution method of the pressure base and the first order upwind scheme was determined,chose a suitable model to replace the effect of different experimental devices,and the Parameters required for the simulation process were calculated.According to the design simulation process,the modeling of the simulation geometry,the suitable division of the grid and the determination of the boundary conditions in the working state were carried out,used Fluent software to simulate the gas phase monophasic flow field,gas-solid phase flow field and gas-solid-liquid three phase flow field in detail,and discussed the optimum Particle size for dust collector.Then,the electric field simulation of charging process was carried out,the electric field distribution under different numerical electric field voltage was com Pared,and the simulation results were verified by experiments.The influence of three single factors of wind speed,fiber grid plate number and electrode structure on the flow field was simulated and studied.Based on that,some suggestions for improving the device of the dust collector were put forward.The simulation results show that:the stability of the air flow and the amount of the dust were important for the stability of the internal flow field,after the spray device was added,the effect of dust collection on the fiber grid was improved,and the dust removal efficiency of the dust collector was obviously improved.After the charging device was added,the dust water mist Particles are trapped and settled by the fiber grid plate,and the effect of dust removal was further improved.Through the test analysis,the optimum working wind speed of the dust collector was 8.25m/s and the optimum working voltage is 35 kVThe.simulation of the fluid movement in the dust collector at different inlet wind speeds can had a negativeeffect of dust removal by too large or too small wind speed.Comparing the monolayer and three layer fiber grating,it was found that the increase of the number of fiber grating was helpful to stabilize the airflow,the best effect was to build 3 layers of fiber gratings under normal working condition.By setting the simulation results of different electrode structures,it was concluded that the cross mang electrode was more suitable for the electrode of the dust collector model.