Modeling for Particle Charging in Wire-Tube Electrostatic Precipitator Study OP Corona Quenching and Precipitation in Humid Air

A modified theoretical model based on the solution of the governing set of equations; namely; Poisson's equation, equation for current density, current continuity condition and charge acquired by the particle is developed to calculate the spatial distribution of the ion charge density, electric field, and particle charge density as well as precipitation efficiency for wire tube electrostatic precipitator. Many of the assumptions made earlier are discussed and corrected to have a model giving more realistic picture for the problem of charging particulate in cylindrical geometry electrostatic precipitators. The validity of this new model and its application for studying some problems in electrostatic precipitation such as corona quenching and precipitation with humid air are presented. Firstly, corona quenching mechanism is studied using aerosol of known particle size distribution and the specific surface area was in the range 0–44 m
2
/m
3
. A comparison between the calculated results given by that model, the experimental results, and other theoretical results obtained by known theories is made. Secondly, using the same model to study the effect of humidity of air in the precipitation process and precipitation efficiency is also discussed.