Numerical Simulation of Flow Field, Particle Field and Electric Field for ESP

doi:10.12096/j.2096-4528.pgt.19083

Abstract

Abstract:

Based on computational fluid dynamics software, with k-ε turbulence model, discrete phase model (DPM) and magneto hydro dynamics (MHD) model, the numerical simulation study of electrostatic precipitator (ESP) system was carried out on multi-field conditions. The numerical simulation results show that, with guide plate and distribution plate, flow deviation of ESP chamber inlet, particle phase flow rate and the first electric field entrance section were improved significantly. Flow deviation of ESP chamber inlet is within ±1%, the root mean square error of gas flow velocity on the ESP inlet section is no more than 0.25. The dedusting efficiency of the model which was calculated at different power supply voltages and inlet flow rates show that, the efficiency of electric dust removal is positively correlated with the supply voltage and negatively correlated with the inlet velocity, which agrees with the reality.

Key words: electrostatic precipitator (ESP), k-ε turbulence model, multiphase flow, air flow distribution, multi-physics field

CLC Number:

TK09

Wenhua LI, Liang BAI, Shangchang YU. Numerical Simulation of Flow Field, Particle Field and Electric Field for ESP[J]. Power Generation Technology, 2021, 42(3): 336-342.

Figures/Tables 11

Fig.1 3D geometric model and grid division of ESP

Fig.2 Particle size distribution

Fig.3 Layout scheme of air flow distribution plate and guide plate

Fig.4 Flue flow distribution

Fig.5 Location of the inlet section of ESP

Fig.6 Velocity vector diagram

Fig.7 Distribution of flue gas velocity in the first electric field of ESP

Fig.8 Particle phase distribution

Fig.9 Particle size distribution deviation at all levels

Fig.10 Distribution of electric potential and movement trail of particles in electric field

Fig.11 Influence law of different supply voltage and inlet velocity on dust removal efficiency

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