Study On Electrode Configuration And Electric Field Performance Optimization Of Porous Dust Collector Plate

The industrial electrostatic precipitator is affected by the change of process conditions,reverse corona and low charge of fine particulate matter,resulting in unstable discharge during operation.In order to alleviate the above problems and improve the overall operation effect of the electrostatic precipitator,the new porous dust collecting plate can fundamentally improve the dust removal performance of the electrostatic precipitator and ensure the efficient and stable operation of the electrostatic precipitator.Electrode is one of the core components of electrostatic precipitator,and reasonable electrode configuration and parameters can make the electrostatic precipitator have better electric field and dust removal performance.Therefore,optimizing different electrode configuration and parameters is of great significance for the design and application of new porous dust collector plate.The prediction of electric field characteristics,flow field characteristics and dust removal performance in the dusting area of two-dimensional porous dust collector plate was studied and analyzed by the method of multi-physical field coupling and experiment.The paper verified and compared the experimental data with the mathematical model to determine the accuracy of the research method,and explained the mechanism of enhanced collection of porous dust collecting plate by comparing the plate with the plate.On this basis,the electric field performance of four kinds of porous plate under the condition of plate shape,electrode line shape and different polar distance range was optimized.Based on the linear current density,the selection result of matching power supply is given.According to the above research content,four kinds of plate shape and four kinds of linear shape are matched to predict and analyze the dust removal performance under different polar distribution forms,and analyze and verify with concrete engineering examples.The main findings are as follows:(1)The comparison error between the calculated values of numerical model and the experimental values is less than 10%,and the accuracy of the research method is reliable.Compared with the plate,the porous plate increased the dust field strength in the dust collecting area by 20%,and the plate opening reduced the surface electric field wind speed by 35%.The effective displacement velocity of 0.01μm～5μm particles in electric field is increased by 30% compared with that of flat plate.At the same time,35% of the particulate matter is deposited in the cavity,which has a certain inhibition effect on secondary dust.(2)The electric field performance under different polar distribution conditions is compared.The results show that the average field intensity in the dust collection area increases with the increase of the opening rate when the aperture is fixed,and the proportion of particles entering the cavity increases with the increase of the aperture.The overall electric field performance can be improved while the dust removal performance is guaranteed with the opening rate close to 50%.The electric field performance of the split-hole plate and the new fishbone wire is the best.Plate spacing range of 300mm～400mm has better dust collection performance,400mm～500mm has a better effect on the anti-corona phenomenon,the best line distance range is in the same pole distance 0.5～1 times of the range.(3)Under the conditions of 400 mm same pole distance and 240 mm line distance,the dust removal performance of different plate shapes,line shapes and pole matching modes was predicted at 60 k V applied voltage.The results showed that the dust removal performance of the splitter plate was the highest than that of the other plate shapes.The new fishbone wire increased the dust removal efficiency of 0.1～1μm particles by 30%compared with other linear shapes,and increased the fine particles collection efficiency.When the new fishbone wire is paired with the mishole plate,the dust removal performance is the best.At this time,the linear current density,which can provide a basis for the selection of supporting power supply.