15th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics (ATE-HEFAT 2021), Johannesburg, South Africa, 26 - 28 July 2021, pp.1672-1676
In this study, a numerical simulation model is introduced to
evaluate the particle collection efficiency and transport
phenomena in an electrostatic precipitator (ESP). Several
complex physical processes exist in an ESP, including the
turbulent flow, the ionization of gas by corona discharge,
particles' movement, and the displacement of electric charge.
Particles suspended in the gas media are charged by the
attachment of ions. Then, charged particles in the fluid move
towards to the collection plate and stick on it. The numerical
model comprises the gas flow, electrostatic field, and particle
motions. The collection efficiency of the wire-plate type ESP is
investigated for the particle diameter range of 1 to 10 µm. It is
observed that electric field strengths and current densities show
considerable variation in the solution domain. Meanwhile,
changing supply voltage significantly affects the acquired
charges on the electrostatic field and particle collecting
efficiencies. Simultaneously, the distance between the charging
and collecting electrodes and the main fluid inlet velocity have
important effect on the particle collection efficiency. The
influence of the different ESP working conditions, and particle
dimensions on the performance of ESP are investigated and
discussed.