The Effect of Corona Wire Position and Radius in a Duct-Type ESP with Wavy Collecting Plates

Abstract

Electrostatic precipitators (ESPs) have become one of the most effective methods for removing harmful particles from various industries. Many investigations in this subject are constantly developing due to the inherent benefits of using an ESP, and there are many robust initiatives taking place today all over the world. Different configurations of collection and discharging electrodes must be investigated to improve the ESP performance of ESPs. Many studies are working to enhance existing models in different ways. The geometry of the electrodes and the collecting plates is one area that could be improved. This paper investigates the wavy designs of collecting electrodes with varied corona electrode radius (range of variable corona radius (0.07-0.6 mm)) and position in a single-stage ESP. Wavy plates (WPs) and Inverted wavy plates (InvWPs) are compared to flat plates (FPs) using a numerical simulation tool. The results of this work show the impact of changing the corona radius when wavy and inverted wavy collecting electrodes are used on the electric potential, electric field strength, current density, and space charge density distribution, and particle collection efficiency. When compared to InvWPs and FPs, WPs show the highest performance in this range of particles. Although InvWPs can be utilized to reduce current density or space charge density, they do not increase particle collection efficiency.

Numerical Study of the Influence of Using Semicircular Corrugated Collecting Plate and Inverted Semicircular Corrugated on the Electrostatic Precipitator

“…In ESP, the electric field is non-uniform. It can be solved quantitatively using the Poisson equation and the charge-conservation equation, which are written in terms of electric potential and space-charge density [1][2][3][4][5][6]:…”

“…The RNG technique and the k-epsilon turbulence model are then employed to establish an incompressible, stable, and turbulent flow as Eqs. ( 7)-( 9) [1][2][3][4][5][6]. High Reynolds numbers (Re) characterize turbulent flows, which can be solved by applying the Reynolds-averaged Navier-Stokes (RANS) equations.…”

“…( 20), we find the definitions of these two classes of forces . Because of the attractive forces between charges of different poles, charged particles will rush to the collecting plates when electrical forces are present [1][2][3][4][5][6]. Until they were charged, the particles would naturally go in the direction of the gas flow.…”

“…ESPs are generally utilized in a variety of industrial applications to collect particles that shouldn't be released into the atmosphere. Although while the particle removal efficiency for small particles (approximately 0.2 μm) has been very low, ESPs can achieve above 99% efficiency and need relatively little energy to operate [1][2][3][4][5][6].…”

“…Particles are charged by the discharge electrodes and are then attracted to and collected by the collecting plates, which have the opposite charge [7]. Ionization is achieved with the use of a high-voltage power source, and the cleaning mechanism gets rid of the particles that have accumulated on the plates [1][2][3][4][5][6]. Electrostatic precipitators (ESPs) can be categorized into two types based on the number of stages and the geometric configuration of their collection plates.…”