How to maintain the decleaning machine of a spiral dust collector

The maintenance of the spiral dust collector's cleaning machine should be comprehensively carried out from five aspects: daily operation monitoring, regular maintenance, key component inspection, system sealing performance testing and safe operation. The specific explanations are as follows:

I. Daily Operation Monitoring

The operating parameters are stable

Intake velocity control: The intake velocity is a key parameter affecting the dust removal efficiency and should be controlled between 14 and 20m/s. For high-concentration dust or fine particle conditions, a lower intake velocity should be selected to avoid turbulence causing the settled particles to be re-lifted, thereby reducing efficiency.

Concentration monitoring: The mass concentration of dusty gas at the inlet has a significant impact on the separation process. At high concentrations, large particles of dust can carry small particles of dust, improving efficiency. However, it is necessary to prevent excessive concentration from causing accelerated wear or excessive pressure drop.

Status check of key components

Ash discharge system: Check daily whether the ash discharge from the ash hopper is smooth, and confirm that the ash discharge valve is not blocked to avoid ash accumulation and blockage.

Fan operation: Monitor parameters such as fan temperature, pressure, and liquid level to ensure there is no abnormal vibration or overheating.

Second, regular maintenance

Weekly maintenance

Pulse valve cleaning: Remove the diaphragm to check for damage. Clean the valve core with alcohol to ensure uniform blowing sound and no air leakage (there will be a "hissing" sound when there is air leakage).

Cylinder/Valve inspection: Test the flexibility of the opening and closing of the compartments to ensure the isolation effect of the compartments of the offline dust collector.

Compressed air drainage: Drain water from the drain valve at the bottom of the air storage tank to prevent water accumulation from affecting the pulse cleaning effect.

Monthly maintenance

Sampling inspection of filter bags: Randomly select 2-3 filter bags to check for wear, aging or holes. If the damage rate exceeds 5%, the filter bag needs to be replaced.

Flower plate sealing inspection: Confirm that there is no gap between the filter bag opening and the flower plate to prevent air leakage that may lead to a decrease in efficiency.

Calibration of differential pressure sensors: Compare the readings with a standard pressure gauge. Adjustments are required when the error exceeds 10%.

Quarterly maintenance

Comprehensive ash cleaning test: Manually trigger all pulse valves to observe whether the filter bags expand evenly and ensure the normal operation of the ash cleaning system.

Anti-corrosion coating inspection: Check the inner walls of the box and the ash hopper for rust, and reapply epoxy anti-corrosion paint to prevent corrosion by acidic gases.

Fan maintenance: Apply grease (such as lithium-based grease) to the bearings, check the tightness of the belt, and ensure stable transmission.

Iii. Maintenance of Key Components

Filter bag replacement

Replacement standards: The damage rate exceeds 5%, the pressure difference remains consistently above 2000Pa and the ash 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 steps: After the machine stops, clean the ash and empty the ash hopper. When removing the old filter bags, avoid dust flying. When installing the new filter bags, do not step on them to ensure a good seal with the flower plate.

Spiral structure inspection

Wear inspection: Regularly check whether the inner wall of the spiral channel is worn, especially in areas frequently impacted by dust. If wear leads to a decrease in separation efficiency, the spiral components need to be repaired or replaced.

Structural tightening: Check whether the connecting bolts of the spiral structure are loose to prevent structural deformation caused by vibration.

Iv. System Sealing Performance Testing

Phosphor leak detection

Spray fluorescent powder at the air inlet and use a UV lamp to check for leakage points at the filter bag opening, flange and other places to ensure there is no air leakage.

Positive pressure test

Close the outlet, inject 500Pa compressed air, and observe the rate of pressure drop. If the pressure drops by more than 5% per 10 minutes, the system's sealing performance needs to be checked and the leakage points repaired.

V. Safety Precautions

Shutdown for maintenance: The power supply must be cut off and a sign must be hung (lock and sign system) to prevent accidental start-up from causing personal injury.

Work in confined Spaces: Before entering the box, test the oxygen content (>19.5%), wear a gas mask to prevent hypoxia or poisoning.

High-temperature component protection: Do not touch high-temperature components until they have cooled down (for example, the shell of a boiler dust collector may exceed 80℃) to avoid burns.

Dust explosion prevention: For flammable dusts such as aluminum powder and coal powder, explosion-proof tools must be used. Open flame operations are strictly prohibited.