Effects of geometric parameters and electric indexes on the performance of laboratory-scale electrostatic precipitators.

The performance of electrostatic precipitators (ESPs) is affected by factors such as the geometric configurations, the charge conditions and the fluid flow and the particulate flow characteristics. In this paper, a theoretical model is presented to study the particle transport in the collecting channel of a laboratory-scale single-stage multi-wire ESP. The employed model is validated by comparing its predictions with published experimental data and other theoretical prediction models. The particle size distribution is represented by a lognormal function, and the effects of the geometric parameters of ESPs on collection efficiency under different charge conditions are calculated and analyzed. The results confirm that the collection efficiency of ESPs can be enhanced by employing large-sized corona wire under the same average current density or corona power ratio, while the opposite rule is shown under the same electric field strength.

[1]  G. A. Kallio,et al.  Interaction of electrostatic and fluid dynamic fields in wire—plate electrostatic precipitators , 1992, Journal of Fluid Mechanics.

[2]  K. W. Lee,et al.  Theoretical model of electrostatic precipitator performance for collecting polydisperse particles , 2001 .

[3]  New model of electrostatic precipitation efficiency accounting for turbulent mixing , 1992 .

[4]  Wallace B. Smith,et al.  A mathematical model for calculating electrical conditions in wire‐duct electrostatic precipitation devices , 1977 .

[5]  Grade efficiency and Eddy diffusivity models , 1995 .

[6]  S. Hassid,et al.  Turbulent deposition of charged particles under the influence of an external electric field , 1988 .

[7]  Zhao Zhibin,et al.  Investigations of the Collection Efficiency of an Electrostatic Precipitator with Turbulent Effects , 1994 .

[8]  Werner Strauss,et al.  Industrial gas cleaning , 1966 .

[9]  Ching-Yuan Chang,et al.  Effects of Some Geometric Parameters on the Electrostatic Precipitator Efficiency at Different Operation Indexes , 2000 .

[10]  P. Cooperman.  A new theory of precipitator efficiency , 1971 .

[11]  M. Mitchner,et al.  Comparison of wire—plate and plate—plate electrostatic precipitators in turbulent flow , 1987 .

[12]  Gene Cooperman.  A unified efficiency theory for electrostatic precipitators , 1984 .

[13]  F. Peek.  Dielectric Phenomena in High Voltage Engineering , 2002 .

[14]  M. Mitchner,et al.  Particle transport in electrostatic precipitators , 1980 .

[15]  Harry J. White,et al.  Industrial Electrostatic Precipitation , 1963 .

[16]  K. Yoo,et al.  Charging and Collection of Submicron Particles in Two-Stage Parallel-Plate Electrostatic Precipitators , 1997 .

[17]  Poul S. Larsen,et al.  Effect of secondary flows and turbulence on electrostatic precipitator efficiency , 1984 .

[18]  K. W. Lee,et al.  Experimental study of electrostatic precipitator performance and comparison with existing theoretical prediction models , 1999 .

[19]  C. Chun,et al.  An improved modelling for prediction of grade efficiency of electrostatic precipitators with negative corona , 2002 .

[20]  P. Bahri,et al.  Mathematical Modeling of Double-Stage Electrostatic Precipitators Based on a Modified Eulerian Approach , 2001 .

[21]  T. Lin,et al.  The Characteristics of Ionic Wind and Its Effect on Electrostatic Precipitators , 1994 .

[22]  G. Ahmadi,et al.  Coupling effects of the flow and electric fields in electrostatic precipitators , 2004 .

[23]  Hsunling Bai,et al.  A Model to Predict the System Performance of an Electrostatic Precipitator for Collecting Polydisperse Particles , 1995 .

[24]  M. Talaie.  Mathematical modeling of wire-duct single-stage electrostatic precipitators. , 2005, Journal of hazardous materials.