Electrode Structure Design And Flow Field CFD Simulation Of Electrostatic Precipitator

In recent years,as the use of fossil fuels has increased,air pollution has become more and more severe.Among them,fine particulate pollutants pose a particularly serious threat to the normal survival and development of human beings.As the main method of flue gas purification treatment,electrostatic precipitator technology plays an important role in power generation,chemical industry,construction and other fields that require industrial dust removal.However,at present,the effect of electrostatic precipitator on the removal of fine particles with small particle size,small charge and great influence of ionic wind is still not ideal.The article takes a more in-depth analysis of the internal flow field distribution state during operation of the dust collector and reduces the negative impact of ion wind flow on the electrostatic dust removal work.The article analyzes the particle shape,charging method,spatial electric field distribution,etc.,and makes use of the current wide range of applications.The FLUENT fluid simulation software simulated and explored the influence of the orifice electrode structure on the spatial ion wind flow field,combined with the dust removal experiment to analyze the dust collection effect of different electrode structures,and conceived and designed a new electrode arrangement method based on the research of the orifice plate.This research can provide reference for the optimization design of electric dust removal.First,the fine dust particles were observed through a microscope,and it was found that it is not a regular sphere.Its uneven shape would make it difficult for the dust particles to reach the ideal uniform saturated state of charge.Using a single electrostatic theory,it is difficult to analyze its complex movement process,blindly increasing the voltage is not the best way to improve the removal efficiency of fine dust.Then,using numerical methods to simulate and analyze the spatial electric field distribution of different electrode structures,it is found that the potential contour distribution of the wire-orifice electrode structure is elliptical,but it has obvious convexity at the opening of the orifice plate.As a result,the electric field distribution is more uneven than that of the wire-plate electrode.The dynamic wind is used to simulate the ion wind,and the influence of the wire-orifice electrode structure on the ion wind flow field is simulated.The results show that the wire-orifice plate electrode structure changes the movement state of the ion wind air flow.The two different pole configurations of the corona wire and the orifice plate weaken the air flow disturbance of the ion wind to the dust collection area,and can effectively improve the dust collector.The collection efficiency of fine dust particles and low specific resistance dust,and it is found that the weakening effect of the ion wind will be more obvious when the corona electrode is directly on the center of the hole of the orifice plate.Then,a dust removal experiment was carried out on the influence of different electrode structures on the performance of the dust collector.The results show that the orifice plate has advantages in the removal of fine particles.The proportion of fine dust on the orifice plate is higher than that of the wire-plate electrode structure under the same conditions,and the amount of dust accumulation around the circular hole on the back of the electrode plate is larger.Comprehensive analysis shows that the large accumulation of dust in the circular hole of the electrode plate is due to the relatively small ion wind force on the fine dust that reaches the vicinity of the circular hole,and it is trapped by the plate under the adsorption action of the electric field around the circular hole.Finally,design and explore the influence of the new type of dislocation plate on the ion wind flow field.Through analysis of the internal airflow distribution and turbulence distribution of the new type of dislocation plate,it is found that when the mainstream wind speed is low,the disturbance effect of the ion wind flow on the flow field is more obvious.When the primary air flow rate is high,the ion wind speed can be increased by adjusting the applied voltage to achieve a better interaction state between the ion wind and the primary air flow.The fine particles are blown into the gap of the dislocation plate,so as to play the role of the dislocation plate to ions.The negative impact of wind is transformed into the role of favorable factors.According to the research results of the article,the electrode structure,electrode allocation mode and discharge intensity are the main factors affecting the distribution of ionic air flow,and the movement state of the ionic wind will affect the collection effect of the electrostatic precipitator on fine particles.By changing the electrode form,as mentioned in this article,the opening of the dust collector plate and the dislocation arrangement of the dust collector plate will reduce the negative impact of ion wind,and use ion wind as power to improve the removal of fine particles by the dust collector.Among them,the new staggered electrode structure can be obtained by directly modifying the original wire-plate dust collector,which greatly saves economic costs.