Held in Kruger Gate, Mpumalanga, South Africa
May May 17 - 21, 2004

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 D 1-4 Series papers from the IX ICESP Conference.  

D1  On experiences of the application of high-frequency power converters for ESP energisation
Per Ranstad, Christer Mauritzson, Martin Kirsten, & Russel Ridgeway  

Abstract
In order to improve Electrostatic Precipitator (ESP) efficiency and system cost a new technology for ESP power supplies, high-frequency power conversion, has been introduced.The first paper on commercial installations was presented about ten years ago (EPRI 1995, Toronto). Products based on this technology have been available on the market since 1993. With the first generation of products the applications were limited to small size ESPs. Through the years the scope has widened and today covers many processes. Still, the available power level limits the use on larger ESP bus sections.

The estimated number, world wide, of installed ESP power supplies based on high-frequency power conversion is close to 1000. This paper aims to evaluate the experiences, which have been gained  through these installations. Aspects such as ESP efficiency, cost and reliability are discussed.

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To go Back to ICESP Paper Page Click Here

D2 Study on Spraying Corona Discharge Technology with Grounding  Discharge Electrodes for Purifying Flue-gas 
Dexuan Xu, Shanshan Lin, Yujia Wang, Zhiming Guo, Weili Ge

This  study  focused  on  a  new  electrostatic  precipitation  technology of  spraying corona discharges with grounding discharge electrodes for purifying flue-gas. DC positive high-voltage was connected to collecting electrodes and water discharge electrodes were grounded. A lasting and effective electrostatic removal of dust with minimized drain water would be achieved by wet or semi-wet spraying corona discharges. The experimental researches on discharge characteristics and cleaning effects of both collecting and discharge electrodes by wet spraying corona discharges were carried out. The treating circulating water and the removing gas contaminant by corona plasma were analyzed. The discharge characteristics of semi-wet corona discharges also were researched. The advantages of spraying corona discharges with grounding discharge electrodes for purifying flue-gas were discussed. The researches have supplied the foundations of theory and design for purifying the flue gases with fine and adhesive dusts using spraying corona discharges.

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To go Back to ICESP Paper Page Click Here

D3  Study On Magnetic Seal Technology of Ash Unloading Device with Impeller of EPS
Yuan-Yongtao,  Qi-Liqiang,  Yang-Qian, &  Ji-Yuanxun

Abstract
The seal problems of ash unloading device with impeller under hopper are very common and important to the successful operation of an electrostatic precipitator. Hoppers become plugged and air ingress causes collected ash to re-entrain resulting in increased emissions, and these rigid seals are subjected to excessive wear and need frequent replacement.

This  paper  discusses  an  advanced  powder  magnetic  seal  design  that  installs  permanent magnets at the top of vane and utilizes the magnetism in the Fe₃O₄ in fly ash to seal the space between the vanes and the walls. The device does not wear and does not need frequent replacement, and the pressure of air seal can be 50kpa.

To View Paper in PDF Format Click Here    
To go Back to ICESP Paper Page Click Here

D4 PARTICULATE REDUCTION USING A SERIES OF ESPS IN A COAL BASED THERMAL POWER PLANT
A.  Chandra

Abstract
The seal problems of ash unloading device with impeller under hopper are very common and important to the successful operation of an electrostatic precipitator. Hoppers become plugged and air ingress causes collected ash to re-entrain resulting in increased emissions, and these rigid seals are subjected to excessive wear and need frequent replacement.

This  paper  discusses  an  advanced  powder  magnetic  seal  design  that  installs  permanent magnets at the top of vane and utilizes the magnetism in the Fe₃O₄ in fly ash to seal the space between the vanes and the walls. The device does not wear and does not need frequent replacement, and the pressure of air seal can be 50kpa.

To View Paper in PDF Format Click Here    
To go Back to ICESP Paper Page Click Here