Calculation and simulation of charging mechanism and electrode parameters of plastics in high voltage electrostatic separator
In order to explore the relationship between the chargeability of plastics in high volt-age electrostatic separator and electrode parameters,through Gauss theorem and Laplace equa-tion,the main charging mechanism of plastic was studied.Using AC/DC electrostatic module in COMSOL Multiphysics,combined with Maxwell's equations,the change regulation of electric field intensity of plastic at different parameters in roller high-voltage electrostatic sepa-rator was studied,and MATLAB was used to draw and analyze.The results show that the charge of plastic is mainly field-induced charge,and the charge is proportional to the particle ra-dius,electric field strength and relative dielectric constant of plastic.In the corona electrode configuration,the surface electric field intensity of the grounding roller is proportional to the voltage and the number of corona electrodes,and is inversely proportional to the polar distance.In the electrostatic pole configuration,the electric field strength is proportional to the radius of the electrostatic pole,and the range of the electric field strength is related to the arrangement angle of the electrostatic pole and the shape of the electrostatic pole.This paper can provide reference for the selection of electrode parameters when conducting high-voltage electrostatic sorting on plastics.
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