1、 Daily operation monitoring

1. Stable operating parameters
   • Intake speed controlThe intake velocity is a key parameter that affects dust removal efficiency and needs to be controlled between 14-20m/s. When working with high concentration dust or fine particles, a lower intake velocity should be chosen to avoid turbulence that can cause settled particles to be re lifted and reduce efficiency.
   • Concentration monitoringThe inlet mass concentration of dusty gas has a significant impact on the separation process. At high concentrations, large particles of dust can carry small particles of dust, improving efficiency, but it is necessary to prevent excessive concentration from causing increased wear or pressure drop.
2. Key component status check
   • Ash unloading systemCheck daily whether the ash hopper discharges ash smoothly, confirm that the ash discharge valve is not blocked, and avoid ash accumulation and blockage.
   • fan operationMonitor parameters such as fan temperature, pressure, and liquid level to ensure no abnormal vibration or overheating.

2、 Regular maintenance

1. weekly maintenance
   • Pulse valve cleaningRemove the diaphragm and check for damage. Clean the valve core with alcohol to ensure even blowing sound and no air leakage (there will be a "hissing" sound when there is air leakage).
   • Cylinder/valve inspectionTest the flexibility of the valve switch in the testing chamber to ensure the isolation effect of the offline dust collector chamber.
   • Compressed air drainageDrain water from the bottom drain valve of the gas storage tank to prevent water accumulation from affecting the pulse cleaning effect.
2. Monthly maintenance
   • Sampling inspection of filter bagsRandomly select 2-3 filter bags and check for wear, aging, or holes. If the damage rate exceeds 5%, the filter bag needs to be replaced.
   • Flower board sealing inspectionConfirm that there is no gap between the filter bag mouth and the flower board to prevent air leakage and reduce efficiency.
   • Calibration of differential pressure sensorCompare the readings with a standard pressure gauge, and adjust if the error exceeds 10%.
3. Quarterly maintenance
   • Comprehensive dust cleaning testManually trigger all pulse valves and observe whether the filter bag expands evenly to ensure the normal operation of the dust cleaning system.
   • Anti corrosion coating inspectionCheck whether there is rust on the inner wall of the box and the ash hopper, and apply epoxy anti-corrosion paint to prevent acid gas corrosion.
   • Fan maintenanceAdd lubricating grease (such as lithium based grease) to the bearings, check the tightness of the belt, and ensure stable transmission.

3、 Key component maintenance

1. Filter bag replacement
   • Replace standardThe damage rate exceeds 5%, the pressure difference continues to exceed 2000Pa and the dust cleaning is ineffective, and the usage time exceeds the limit (2-3 years for polyester filter bags and 4-5 years for PTFE filter bags).
   • replacement stepsClean the ash and empty the ash hopper after stopping the machine; When removing the old filter bag, avoid flying dust. When installing the new filter bag, it is strictly prohibited to step on it and ensure that it is sealed with the flower board.
2. Spiral structure inspection
   • wear inspectionRegularly check whether the inner wall of the spiral channel is worn, especially in areas with frequent dust impact. If wear causes a decrease in separation efficiency, repair or replace the spiral components.
   • Structural fasteningCheck if the connecting bolts of the spiral structure are loose to prevent structural deformation caused by vibration.

4、 System sealing test

1. Fluorescent powder leak detection
   • Spray fluorescent powder at the air inlet and use ultraviolet light to check the leakage points at the filter bag mouth, flange, etc., to ensure that there is no air leakage phenomenon.
2. Positive pressure test
   • Close the outlet, inject 500Pa compressed air, and observe the pressure drop rate. If the pressure drops by more than 5%/10 minutes, the system sealing should be checked and the leakage point repaired.

5、 Safety precautions

1. Shutdown maintenanceIt is necessary to cut off the power and hang a tag (lock and tag system) to prevent personnel injury caused by misoperation.
2. Work in confined spacesBefore entering the box, check the oxygen content (>19.5%) and wear a gas mask to prevent hypoxia or poisoning.
3. High temperature component protectionAfter cooling, come into contact with high-temperature components (such as boiler dust collector shells that may exceed 80 ℃) to avoid burns.
4. Dust explosion preventionFlammable dust such as aluminum powder and coal powder require the use of explosion-proof tools, and open flame operations are prohibited.