Electrostatic Precipitator Dust Removal System
The ash handling system keeps the material (ash etc.) out of the hoppers!
Why is it important to maintain the operation of the ash handling system?
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Make sure the dust removal system is functioning without any problems. Basically, the material collected
by the electrostatic precipitator has to be removed at a faster rate than it is being collected. If not,
the material will build up in the precipitator hoppers and eventually short out the high voltage sections.
Even worse, if the material builds up into/between the collecting plates, the weight of the material can
force the collecting plates apart and induce permanent damage (bowing) in the plates. |
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The first row of hoppers is going to be the most challenged due to the fact that approximately 70 to 80% of the total
material collected by the electrostatic precipitator will be removed in the first field. The plant must pay particular
attention to ensure that these hoppers don't fill up.
- In summary, the plant operators should:
- Make sure the ash handling system is in good operating condition
- Make sure all ash valves work properly and no air leaks are present
- Maintain operation of hopper heaters, vibrators, etc.
- Constantly observe the level alarms and immediately resolve any high level alarms
Precipitator Hopper sketch showing grounding chains.
If the level of dust is too high in the hopper, the TR set grounds out.
This prevents the dust to damage the lower frame and collecting electrodes by pushing up on them.
Quick links to:
High Voltage Energization System
Electrical Readings
Rappers
Corrosion
Gas Flow Distribution
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