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ICESP X CONFERENCE PAPER ABSTRACTS 5B SERIES

Held in Cairns, Australia
June 25 - 29, 2006

The International Conference on Electrostatic Precipitation (ICESP) is the official conference of the International Society for Electrostatic Precipitation (ISESP).  

The following is a list of the Abstracts for the 5B Series papers from the X ICESP Conference.  

5B1
SPARK AND ITS EFFECT ON ELECTROSTATIC PRECIPITATOR

KURT HUANG

Abstract

The role of components in an Electrostatic Precipitator (EP) for a spark and both the phenomenon and mechanism of a spark are elaborated and then the type of spark is classified by the condition of shortage between the discharge and collecting ele ctrodes. The secondary voltage and current waveforms of a spark are discussed in order to address the severe effect of the secondary and primary current spikes while a spark occurs. The fundamental difference between a spark and its detection algorithm in a wet EP and a dry one is explained so as to clarify why the spark detection for a wet EP cannot work for a dry one. The problem of frequent sparking in a dry EP is addressed together with the explanation on the disadvantage of the spark detection and control algorithm adopted in most AVC in service today. The effectiveness and significance of the damage caused by sparks on both primary and secondary sides of the electrical circuit of an EP are elaborated with two field cases as respective demonstrations. The investigations’ results and solutions developed thereby in these two field cases are given together with the observations after implementing the solutions. Further, an enhanced algorithm of spark control is proposed in order to overcome the problem of frequent sparking in a dry EP.

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5B2 
UNIVERSAL RELATIONSHIP BETWEEN COLLECTION
EFFICIENCY AND THE CORONA POWER OF THE ELECTROSTATIC PRECIPITATOR
YAKOV S. KHODORKOVSKY & MICHAEL R. BELTRAN

Abstract

The basic principles of aerosol and particle collection using the electrostatic precipitation process are well understood as the result of extensive laboratory and field testing carried out over almost a century. Thanks to these tests the phenomena of ionization by corona discharge, particle charging and collection, the influence of gas velocity distribution and gas flow turbulence, and so on, are now reasonably clear. The numerical prediction of the main design parameters of the ESP is less advanced due to the very complex flow phenomena which are the result of the interaction between a high-strength electric field, a turbulent gas flow field, and the motion of particulates. Therefore, to date the widely used ESP design approach is based on the systematic accumulation of performance data from existing devices. On the basis of these performance data one can evaluate the collection efficiency, electrical power and main design parameters of new ESP installations. Designs based on existing devices require experience, talent and engineering intuition. The importance of these qualities cannot be denied, nevertheless the design of an effective and optimal industrial ESP has to be based on basic principles and fundamental universal relationships that are still missing.

In this paper we will discuss one of such theoretically derived approaches which describes therelationship between collection efficiency and the corona power of the Electrostatic Precipitator.

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