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ICESP X CONFERENCE PAPER ABSTRACTS 8B 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 8B Series papers from the X ICESP Conference.  

8B1
INVESTIGATIONS ON FLY ASH RESISTIVITY:
DEVELOPMENT OF EMPIRICAL RELATIONS BASED ON EXPERIMENTAL MEASUREMENT
A. CHANDRA, SANJEEV KUMAR, SUBODH KUMAR AND P.K. SHARMA

Abstract

Fly ash resistivity is a single parameter which has got significant impact over sizing and performance of Electrostatic Precipitator (ESP) in coal based thermal power plants. A fly ash resistivity measurement facility has been set up at IIT Delhi with the support of National Energy Technology Laboratory (NETL), USA and USAID-India. The fly ash samples from different power plant are being collected by CenPEEP, NTPC and supplied to IIT Delhi for measurements. The experiments were conducted for the measurements of electrical resistivity over a wide range of temperatures (90-455) 0C as per IEEE standards. Around 250 samples obtained from different power plants in India, have been tested. Empirical relations developed by Bickelhaupt, which are based on the chemical composition of fly ash for calculating the electrical resistivity are used to calculate as theoretical value for given experimental conditions. Comparisons between fly ash resistivity obtained from experiments and theoretical values show significant differences between the two values especially at low temperatures (90-160 0C), where surface conduction is important. This is due to the different chemical compositions of ash/fly ash obtained from the coals used in power plants in India and USA. New empirical relations based on chemical compositions, generated in typical Indian power plants have been developed to calculate electrical resistivity at the temperature and moisture corresponding to actual conditions to ESP. These relations provide better agreements with experimental values.


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8B2 
EXPERIMENTAL AND CALCULATED VALUES OF MIGRATION VELOCITY AS A PARAMETER OF PRECIPITATION PROCESS IN ELECTROSTATIC PRECIPITATORS
M. JEDRUSIK, A. SWIERCZOK, J. PAJAK

Abstract

This paper presents results of experimental studies of fly-ash particles migration velocity obtained in a horizontal electrostatic precipitator (ESP) physical model. 

The particle migration velocities were recorded and measured by means of photo camera visualization of particle movement trajectories and the ESP model performance effectiveness. Tests were carried out with different parameters of electrical field, different kinds of fly ash and particle size distribution, and for many types of discharge electrode shapes. Substantial influences of discharge electrode shape on the measured migration velocities were found.

The test results shown as graphs and tables, confirm the possibility to utilize the physical ESP model results in the ESP design processes as well as for selection of precipitation process adequate discharge electrodes.


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