Precipitator Energisation Control System
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United States of America Patent
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Issued Date -
Oct 30, 2008
app pub date -
Oct 31, 2006
filing date -
Oct 31, 2005
priority date (Note) -
Abandoned
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Abstract
The energisation of an electrostatic precipitator is controlled in order to reduce arcing and/or back corona between the precipitator electrodes, using the precipitator current as a feedback parameter. A high speed switching device is used to control the energisation of the precipitator electrodes so that the precipitator current is regulated to a desired level with a response time that is significantly less than the arc generation time constant. The energisation is controlled so that the precipitator current is regulated to a predetermined value below the current level at which arcing occurs. The energisation response is proportional to the severity of the arcing, which can be based on the power and frequency of arcing. If back corona is detected, the energisation can also be controlled to reduce back corona.
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