The maintenance of bag filters during use is crucial, and the following are some of the main maintenance points:

Filter bag maintenance

Regular inspection: Conduct a visual inspection at least once a week to check for any damage, detachment, blockage, or sticking of the filter bag. If the filter bag is found to be damaged, it should be replaced in a timely manner to prevent dust leakage from affecting the dust collection effect.

Cleaning and maintenance: Based on the characteristics of dust and the operation of the dust collector, set the cleaning cycle and time reasonably. Generally, a bag filter with pulse blowing for dust cleaning is used, which can be cleaned every 1-2 hours. When cleaning, pay attention to the cleaning effect to ensure that the dust on the surface of the filter bag can be effectively removed. For dust with high viscosity, offline cleaning method can be used to improve the cleaning effect.

Prevent condensation: Control the internal temperature of the dust collector to be 20-30 ℃ higher than the dew point temperature, to prevent moisture in the dusty gas from condensing on the surface of the filter bag, causing dust to stick to the bag. During cold seasons or when dealing with humid gases, the dust collector can be insulated or equipped with heating devices.

Cleaning system maintenance

Pulse valve inspection: Check the working status of the pulse valve daily to see if there are any air leaks, abnormal pulse blowing, or other phenomena. Regularly clean the impurities and accumulated water inside the pulse valve to ensure that the diaphragm, spring, and other components of the pulse valve are working properly. If the pulse valve is found to be damaged, it should be replaced in a timely manner.

Maintenance of compressed air system: Ensure that the pressure and quality of compressed air meet the requirements, and the pressure is generally maintained at 0.4-0.6MPa. Regularly discharge accumulated water and oil from the air compressor and storage tank to prevent them from entering the pulse blowing system and affecting the dust cleaning effect. At the same time, check whether there is any leakage in the compressed air pipeline, and repair it in a timely manner if there is any leakage.

Maintenance of dust cleaning controller: Regularly check whether the parameter settings of the dust cleaning controller are correct and whether the program runs normally. Clean the circuit board and display screen of the controller to prevent dust accumulation from affecting its performance. If a malfunction is found in the controller, it should be repaired or replaced in a timely manner.

Fan maintenance

Daily inspection: Check the operation status of the fan every day, including vibration, noise, temperature, etc. Check whether the impeller of the fan is worn or deformed, and whether the gap between the impeller and the casing is normal. If excessive vibration or abnormal noise is found in the fan, it should be stopped immediately for inspection, and the cause should be identified and repaired.

Lubrication and maintenance: According to the user manual of the fan, regularly lubricate the bearings of the fan. Generally, the lubricating grease should be replaced every 3-6 months. For fans used in high temperature and high dust environments, the lubrication cycle should be appropriately shortened.

Belt drive inspection: For fans using belt drive, it is necessary to regularly check the tension and wear of the belt. Loose belts can cause a decrease in fan speed, affecting dust collection efficiency; Tightening the belt will increase the bearing load and shorten the service life of the bearing and belt. If severe belt wear is found, it should be replaced in a timely manner.

Electrical system maintenance

Regular inspection: Conduct a weekly inspection of the electrical system to check whether the wiring of electrical equipment is loose or overheating, and whether protective devices such as fuses and relays are working properly. Clean the dust inside the electrical control cabinet to prevent dust accumulation from causing electrical faults.

Insulation testing: Conduct insulation testing on electrical equipment every 3-6 months to ensure good insulation performance. If the insulation resistance is found to be lower than the specified value, the cause should be promptly identified and dealt with to prevent electric shock accidents and electrical short circuit faults.

Lightning protection grounding inspection: Before the thunderstorm season, inspect the lightning protection grounding system of the dust collector to ensure that the grounding resistance meets the requirements, generally not exceeding 4 Ω. Check whether the grounding circuit is damaged or broken, and whether the grounding electrode is corroded. If there are any problems, they should be repaired or replaced in a timely manner.

Maintenance of other components

Ash hopper and ash unloading device: Regularly check the ash accumulation of the ash hopper to prevent excessive ash accumulation from affecting the dust collection effect. Check the working status of the ash discharge valve to ensure that it can discharge ash normally and prevent ash leakage. For ash conveying equipment such as screw conveyors, it is necessary to regularly check the wear of their screw blades, clean up debris inside the conveyor in a timely manner, and ensure smooth ash conveying.

Import and export pipelines and valves: Check whether the import and export pipelines are worn or leaking, and whether the supports and hangers of the pipelines are firm. Regularly maintain the valve, check the sealing performance of the valve, ensure that the valve can be opened and closed normally, and prevent gas short circuits.