A numerical method for calculating the ion- and particle-charge density, the electric field intensity, and, consequently, the ion- and particle-current density in a wire-duct electrostatic precipitator is reported. This method is based on numerically solving the main set of equations defining the ionized field. These include Poisson's equation, the current density equation, and the current continuity equation. The space-charge-free field is calculated using the charge simulation technique. The distribution of the electrical conditions is determined as a function of the applied voltage. Both cement and steel particles are considered. This method is checked against published calculations. Findings are correlated to the physics of corona discharge.

NULLIn this paper, a simple and fast method for estimating the saturated profiles of the field intensity, ions and particles charge density, ions and particles current density, relative precipitated dust and the overall precipitation efficiency of the wire-duct electrostatic precipitators is reported. Both ions and particles in space surrounding the energized wires are taken into consideration. This method is based on simple expression which define the ionized field in the interelectrode spacing surrounding the HV wires of the wire-duct electrostatic precipitator in presence of dust particles and under saturated conditions. The precipitation efficiency of the electrostatic precipitators under saturated conditions is also estimated for cement industry. The effect of some parameters on the precipitation efficiency is also reported. The precipitation efficiency of the wire-duct electrostatic precipitator as influenced by both the applied voltage and the gas flow speed is discussed in this paper. The present findings are correlated to the physics of electrical corona discharge.

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