Excessisve arcing in a precipitator
Excessisve arcing in a precipitator
(OP)
I work for a refinery, and we are experiencing arcing in our precipitator. Aside from shutting it down, how can we reduce it?
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Excessisve arcing in a precipitator
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RE: Excessisve arcing in a precipitator
Could the composition of the flue gas have changed to make it a high resisitivity ash? Increasing Mg and Ca will cause arcing. Na and K will reduce arcing.
Increase in flue gas temperature will cause more arcing by changing the ash resisitivity. The increased velocity will also reduce the retention time and allow more dust to escape.
Are the controls tunned correctly?
Due you have internal mechanical probelms like wire to plate spacing? High ash hoppers? Dirty insulators tracking the electricty?
There are a lot of reasons for arcing, shutting it down my not get what you need.
RE: Excessisve arcing in a precipitator
You could run V/I curves and see if the resistivity or cleanleness has changed. Providing you have some histic V/I curves to compair when the precip was operating well.
RE: Excessisve arcing in a precipitator
Good Luck