Symptom |
Cause |
Solutions |
| Corrosion Damage |
Air Leakage |
- Replace leaking door gaskets
- Replace damaged rapper penetration seals
- Replace damaged hammer drive seals
- Repair leaking duct work test ports
- Repair/replace leaking expansion joints
- Repair leaking weld seams
- Repair holes in casing
- Contact Hamon Research-Cottrell about a seal air and blast heater system
|
| Poor insulation design |
- Re-insulate ESP hot roof to penthouse corners
- Check/replace/install new hopper heaters
|
| Process |
- Contact HRC about a process study |
| Deposits on Plates & Electrodes |
Improper or poor rapping |
- Verify rapper / vibrator systems operating
- Inspect for binding or broken rapper shafts
- Inspect for bound collecting plates
|
| Moisture / Condensation |
- Check for air leakage, repair as noted above
- Check for improper or poor insulation
|
| Change in gas chemistry |
- Check for air leakage, repair as noted above
- Check for reduced gas temperature
- Check for change in operating conditions, fuels
- Contact Hamon Research-Cottrell for process analysis and dust resistivity test
|
Stack puffing
(re-entrainment) |
Improper or poor rapping |
- Verify rapper / vibrator systems operating
- Inspect for binding or broken rapper shafts
- Inspect for bound collecting plates
- Adjust control rapping schedule & intensity
- Contact Hamon Research-Cottrell for new microprocessor controls
|
| Heavy dust buildup |
Gas flow distribution |
- Check for damage to inlet and outlet nozzles, baffles, louvers and perforated plates
- Modify turning vanes or baffles
|
| Control tripping |
Grounding |
- Clean insulators of all dust & condensation to prevent tracking
- Check insulators for cracking
- Check plate & electrodes for clearances & straightness
- Check for broken wires
- Check hopper level
- Contact Hamon Research-Cottrell for Service
|
| High Particulate Emissions Or High Opacity |
Gas Flow Distribution |
- Contact HRC for ESP gas flow model study |
| ESP Sizing |
- Contact HRC for ESP process/sizing review |
| Fuel or process change |
- Contact HRC for coal chemistry study
- Contact HRC for dust resistivity analysis
|
