About Improving Collection Efficiency for Industrial Plate-Type Electrostatic Precipitator

Gabriel Nicolae Popa

doi:10.4028/www.scientific.net/aef.8-9.165

Gabriel Nicolae Popa

Open Access

https://doi.org/10.4028/www.scientific.net/aef.8-9.165

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Abstract

Plate-type electrostatic precipitators are the largest and most used industrial dusts control, most applications are in the production of electricity (thermoelectric power plants). In many industrial applications, plate-type precipitators have three sections and silicon-controlled rectifier power supplies type. Although, the collection efficiency obtained by these type of precipitators are more than 95%, most of the dust particles with diameter less than 10 μm remain un-collected. To improve the collection efficiency different electrical and/or mechanical options can be used. To improve the collection efficiency of industrial plate-type precipitators, the paper presents two practical options. The first solution would be replacing the power supplies silicon-controlled rectifier - with other special power supplies (intermittent power supplies, high frequency power supplies) depending on the dust resistivity; the second solution would be to add a new section at precipitator an expensive solution, usually the last. The technological and electrical sizes, simulated and measured, are presented for the proposed solutions.

Highlights

The electrostatic precipitators have been used in industry applications, for almost a century to controlling pollution with dust particles [1]
The electrostatic precipitator (ESP) itself is the part of the electric de-dusting installation in which takes place the ionization and separation of the dust particles from gases [2,3]
For industrial ESPs, using the intermittence power supplies may improve collection efficiency up to 1% comparable with SCR power supplies, for both shacking and not shacking sections

Summary

Introduction

The electrostatic precipitators have been used in industry applications, for almost a century to controlling pollution with dust particles [1]. The type of the power supplies of ESPs sections is one of the most important factor that causes a high collection efficiency of dust particles. The intermittent energization can be used to collect medium dust resistivity 109-1011 Ω⋅cm [2] Another type of power supply is pulse energization, has a short duration high voltage pulses superimposed on a continuous voltage. For voltages shown in Figs.1.a-1.d the electrodes are without dust, the resistivity of the dust was considered to be 1010 Ω⋅m (high resistive, as ashes arising from coal burning) This leads to a lower consumption of electricity, with the decrease in the number of pulses (increasing intermittence degree). Electrical parameters, on sections, for different types of voltage supply - simulations

Section 1

Findings

Conclusions