The maintenance cycle of the wet electrostatic precipitator should be the same as that of the boiler. A short-term shutdown is mainly for inspection and minor repair of key parts, and long-term shutdown is for comprehensive inspection and overhaul.
A – The main content of minor repairs
1. Check the dust accumulation of the discharge electrode and the dust collector, and deal with it.
2. Adjust the deformed polar line and replace the broken polar line.
3. Check the anti-corrosion, including the casing and the cathode suspension system, and deal with the problems in time if any problems are found.
4. Clear the dust accumulated in the insulator chamber of the suspended discharge electrode, and replace the damaged insulator.
5. Check and repair the sprinkler system, and repair it in time if any leakage is found.
6. Check all manual electric valves and check all actuators. If the sealing device is found to be damaged and aged, it should be replaced.
7. Overhaul the air leakage at the smoke box, shell and manhole door of the equipment.
8. Check and repair all piping systems, deal with leaks in time, and carry out sewage and drainage.
9. Check whether all monitoring instruments and instruments (thermometers, heat exchangers, pressure transmitters) are normal
10. Overhaul all control cabinets, operation boxes and distribution boxes to see if they are normal.
B – Main content of overhaul
1. Clean the inside of the wet electrostatic precipitator, the ash hopper, and the dust accumulated in the flue.
2. Check the damage and corrosion of the deflector and repair it.
3. Check and adjust all the distances between the same poles and different poles, replace the deformed and damaged pole lines, and repair the damaged anode tube bundles.
4. Overhaul high and low-voltage power supply equipment and control systems.
5. Overhaul and repair the corrosion damage of the casing and ash hopper.
6. Overhaul all pipelines, valves, joints, water pumps, nozzles, heaters, and electric butterflies.
7. Overhaul and check all monitoring and control instruments and meters.
8. Grounding grid inspection, and insulation resistance measurement.
9. Check and confirm the control program.
10. Overhaul the heat preservation, shell, lighting, and lifting devices of the wet electrostatic precipitator.