Finite difference quasi-static and dynamic models for pulse-powered electrostatic precipitators in presence of dust

This paper describes an accurate model and a new procedure for the numerical computation of the electric field, current and charge density in a pulse powered electrostatic duct-type precipitator, in the presence of dust. The proposed model is compared with the classical steady-state model, used in the past: while the old model shows nonphysical bumps and discontinuity, the new approach predicts the natural transient behaviour of electrical quantities. The partial differential equations governing the transient phenomena are solved by means of an implicit-explicit FDTD method, which ensures a fast computation. The obtained results, compared with experimental values, show a good accuracy of the presented method.