VII CONFERENCE PAPER ABSTRACTS DE-2 SERIES
Held in Kyongju,
Conference on Electrostatic Precipitation (ICESP)
is the official conference of the International Society for Electrostatic
Experimental Study of a Moving Electrode Electrostatic
this study several parameter was investigated to know the
characteristics of moving electrode electrostatic precipitator such
as collecting plate velocity, applied voltage, gas velocity,
particle load and applied voltage waveform.
experimental results show that collection efficiency and V-I
characteristics of MEEP for high resistivity fly ash are very
stable. Thus collection efficiency is high in comparison with the
conventional EP. The
effect of intermittent pulse discharge on the collection efficiency
and specific corona power increase with pulse period in the
Design of Electrostatic Precipitators after Pulverized Coat
of severe corona suppression due to high concentration of ultra-fine
ash (space charge effect) and of the dust cake resistivity can be
improved with better knowledge of the characteristics of the
particulate entering the ESP. A
more efficient and reliable ESP can then be designed even for the
low emissions that are demanded now.
paper briefly describes investigations that have been conducted by
ABB to combat the problem of high resistivities in ESPs.
Various approaches to superior design such as flue gas
cooling, use of spiral discharge electrodes and micro-second pulse
energization are described.
the performance behavior in the ESP for a large number of worldwide
coals is presented in the context of the detailed ash particulate
size and composition. A
drop-tube furnace was used to produce ash particles similar to those
generated in a pulverized coal-fired boiler.
Particle size and fly ash composition distribution varied
substantially even for coals with similar bulk ash composition.
effect of different boiler conditions on the ash properties is also
presented. A high flame
temperature generates a high amount of ultrafine particles, ~0.1.
The resulting high surface area of the ash, in some cases,
may not be fully conditioned by the available sulphur trioxide in
the combustion flue gas, resulting in high dust cake resistivity.
of the independent effects of flue gas temperature and humidity have
been evaluated during controlled conditions in pilot-scale tests.
This provides a good basis for implementing designs with
reduced ESP size. A
review of experience of ESP operation at low gas temperatures is
presented in this context.
Horizontal Discharge Electrodes in an Electrostatic
aligned discharge electrodes have advantages with respect to
production, packing, transportation, erection and maintenance over
vertically aligned electrodes. Simple
theories of the electrodynamic process mention the concept of
“electrical sneakage”, which should exclude designs applying
horizontally aligned discharge electrodes in horizontal gas flow
precipitators. Yet, it
seems that reality is more complex, and laboratory experiments have
revealed that such type of discharge electrode is at least as
efficient as discharge electrodes of traditional design.
present paper will report laboratory results with horizontal
discharge electrodes and attempt to explain why the precipitator
operates well in spite of “electrical sneakage” and in spite of
the risk of provoking more intense secondary flow such as
The Collection of Fine Particles by an Electrostatic
Electrostatic Lentoid Precipitator and its Performance
Last updated: January 09, 2010.
Copyright © 1999 TRK Engineering Services, Inc. All rights reserved.
For more information contact: TRK Engineering Services - 95 Clarks Farm Road - Carlisle, MA 01741 - Telephone: 978-287-0550 - Fax: 978-287-0569 - email: firstname.lastname@example.org