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Held in Kyongju, Korea
September 20-25. 1998

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 OU-1 Series papers from the VII ICESP Conference.  

OU01  Rebuilding and Upgrading Electrostatic Precipitators – A Consultant’s Perspective
Dr. Robert R. Crynack
EPSCO International
William J. Armiger, Jr.
EPSCO International

Electrostatic precipitators (EPs) have been used for particulate emissions control for nearly 100 years.  They are used in many different industrial applications.  With new, more stringent pollution control regulations and the high cost of new pollution control equipment, many users are looking for ways to rebuild and upgrade their existing equipment in the most cost-effective way.  Many users do not understand all that is required to properly design and operate EPs to achieve maximum efficiency and life expectancy, while minimizing maintenance costs.  Sometimes the interests of equipment suppliers do not correspond with the best interest of the user.  Sometimes the proposed equipment from suppliers varies greatly.  These circumstances have resulted in a worldwide trend of replacing old equipment with oversized new equipment at great expense to the users.

The independent consultant can provide an objective assessment of the users requirements, keeping in mind his clients preferences and financial resources.  Often the existing EP can be rebuilt and upgraded at a fraction of the cost of new equipment, and yet, efficiency can be increased sufficiently to meet the emission limitations.  This paper presents an independent consultant’s perspective on how an existing EP can be rebuilt and upgraded to improve its efficiency and reliability, as an alternative to more costly expansion of the existing casing or complete replacement.

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OU02  Boiler Leakage from Power Plant Cause the Effect to ESP
XinMin Li & JianPing Pang
Design & Research Department
Xuanhua Metallurgical & Environmental Protection Equipment 
WenLin Ma
Xuanhua Metallurgical & Environmental Protection Equipment 

A certain power plant unit occurred boiler leakage, while two ESPs working voltage and dust-collecting efficiency improved obviously.  At the same time, the hoppers were stopped up badly.  The unit stopped.  But when it started to run again, the working performance of ESP came back to the same level as before leakage.

Key words: power plant unit, boiler leakage, electrostatic precipitator (ESP).

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OU03  Study on Design Parameters for Optimum Flow Distribution in an Electrostatic Precipitator
Gun Myung Lee, Seong Jin Park, Hyeuk Pill Kim, Chae Su Lee
Je Wook Ryu and Young Ho Shin

One of the most important factors in the design of modern high performance EP (electrostatic precipitator) is the uniformity of flue gas velocity entered the precipitator.  Severe nonuniformity may cause erosion and excessive reentrainment of the collected fly ash from hoppers and collecting electrodes.  These combined effects may reduce the performance of EP considerably, often by as much as 20-30% or even more.

Both 3-dimensional numerical simulation and experimental study were conducted to study the design parameters, such as guide vanes, perforated plates, and grids attached on perforated plates, affecting flow distribution of the flue gas.  Numerical simulation was performed as a preliminary design.  Numerical simulation shows limitation in the design of EP because of its complex geometry.  However, the flow pattern produced by the numerical simulation can be used as important design information at the initial stage of design.  Experimental study was conducted with a scale downed test model. The optimum combination of the three major parameters, guide vanes, perforated plates, and grids attached on perforated plates, was studied.  In addition, the techniques for the optimum combination were established.

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OU04  Investigation of Pulse Energization and Agentless Conditioning at Pilot Electrostatic Precipitator of 300 MW Coal Fired Boiler
Alexandr M.Zykov and Konstantin I.Kolchin
All-Russian Thermal Engineering Institute (VTI)
Viktor D.Bochkov and Igor N.Gnedin
Scientific Production Corporation "Plasma"
Ravil H.Amirov and Igor S.Samoilov
Institute for High Temperatures
Anatolii I.Sergeev, Anatolii I.Balykin
Kashira Thermal Power Plant

Reconstruction of electrostatic precipitator (ESP) with gas flow rate 300000 Nm3/h has been carried at Kashira Thermal Power Plant to test two methods of improving the performance of ESP, collecting high resistive ash.

One of these methods, agentless Electrophusical Conditioning (EPC) allows to reduce ash resistivity by means of conversion of a small SO2 fraction presented in flue gas into SO3.

This is performed in a special reactor installed in the gas distribution section of the conventional ESP.  Pulse power supply needed to excite the streamer corona discharge in such reactor has a module design with the single module average power about 25 kW, and total draft power about 300 kW, pulse voltage up to 100 kV, pulse length of 500-1500 ns, pulse repetition rate up to 2,5 kHz.

The second method permits to decrease the voltage drop across the dust layer on the collection plates owing to pulse energization of the conventional ESP sections.  For that purpose the pulse generator has the following parameters:

-pulse length of 50µs, pulse voltage up to 40 kV;

-pulse repetition rate up to 400 Hz.

The test have shown a reliable performance of the single nanosecond module.  The comparison demonstrated that the pulse microsecond energization could reduce outlet dust leading by twice against the conventional energization.

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OU05  The Performance and Application of Roof-mounted Electrostatic Precipitator

Abstract not available

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Last updated: January 16, 2010.
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