When to replace industrial dust filter cages？

1. When should industrial dust removal filter cages be replaced?

The filter cage is the "supporting framework" of the filter bag. The condition of the industrial dust removal filter cage directly affects the performance and service life of the filter bag. Consider replacing the filter cage if the following conditions occur:

2. How to Inspect Filter Cages?

Regular inspection of industrial dust removal filter cages is key to identifying problems promptly. Inspections should focus on the following:
Visual Inspection: Carefully inspect for rust, deformation, loose solder joints, burrs, and peeling coatings.
Measuring Verticality: Place the cage frame on a flat surface or use a specialized tool to measure its straightness and verticality. The general requirement is for the deviation to be no more than one thousandth of the total cage length.
Manual Inspection: Feel the surface for smoothness and gently shake to check for welds.

3. Tips for Extending Filter Cage Life

Proper Selection: Select the appropriate cage frame material (e.g., mild steel, 316L stainless steel) and surface treatment (e.g., silicone spray coating, electrogalvanizing, or pure epoxy coating) based on flue gas characteristics (temperature, humidity, and corrosive components).
Proper Installation and Removal: When installing and removing filter bags, avoid banging or impacting the cage frame to prevent deformation. Ensure the cage frame is aligned with the panel holes to avoid forced installation.
Maintain a good operating environment: Strictly control the flue gas temperature at the dust collector inlet above the dew point to prevent condensation and corrosion. Pre-treat highly corrosive flue gas.
Perform regular maintenance: Clean and inspect the cage frame during regular dust collector inspections. Minor rust can be removed and then re-applied with anti-corrosion paint. However, if rust is severe or deformed, it should be replaced promptly.

4. Precautions for Replacing the Filter Cage

Safety First: Before replacement, always disconnect the power and air supply and lock out the unit (LOTO procedure). Ensure the dust collector interior is fully cooled and ventilated before entering.
Cleaning the panel holes: Before installing a new cage frame, thoroughly clean any accumulated dust and debris from the edges of the panel holes to ensure a smooth sealing surface.
Avoid damaging the filter bags: When installing a new cage frame, handle it gently, ensuring it is vertical and centered, and then slowly insert the new filter bag to prevent scratching the bag. Replacement: It is recommended to replace the cage frame in poor condition when replacing the filter bag. This operation may seem to increase the single cost, but it can effectively protect the more expensive filter bag and is a more economical choice in the long run.