Flow field optimization and particulate collection performance prediction in wet electrostatic precipitators for deep converter gas purification

To improve the practical engineering application effect of the wet electrostatic precipitator for the gas from a certain converter outlet cabinet， the internal flow field of the wet electrostatic precipitator was simulated and analyzed through COMSOL Multiphysics， and its dust removal performance and volt-ampere characteristic curves under different working conditions were predicted. The results showed that after optimizing the airflow distribution， the root mean square of the airflow at the inlet section of the electric field was 0.159， and the total pressure difference between the inlet and outlet of the electrostatic precipitator was 205 Pa， which met the emission standard requirements. When the inlet particle concentration was 100 mg/Nm3 and 150 mg/Nm3， respectively， the wet electrostatic precipitator should be ensured to operate under an external voltage of 30 kV and 35 kV or above， so that the outlet particle concentration could meet the requirements of gas users' usage standards. Under the condition of an applied voltage of 30 to 45 kV， the line current density can be taken within the range of 0.048 to 0.149 mA/m. Through on-site measurement， the numerical simulation results were in good agreement with the measured results. This study can provide a reference for the selection and design of wet electrostatic precipitators and their power sources for converter discharge gas.