Effective Measures to Prevent Filter Bag Blockage

Filter bag blockage is a common fault of baghouse dust collectors, which will reduce dust removal efficiency and equipment life. 

The following six effective measures can prevent blockage:

1. Optimize pre-treatment: 

Install a cyclone dust collector or sedimentation chamber at the inlet to remove large-particle (≥10μm) and viscous dust in advance, reducing the load on the filter bag.

2. Adjust cleaning parameters:

 According to the dust concentration and viscosity, appropriately increase the cleaning frequency and pressure to ensure the dust on the filter bag surface is fully cleaned. For viscous dust, extend the cleaning time appropriately.

3. Control intake humidity: 

Avoid high-humidity gas (relative humidity ≥80%) from entering the dust collector. Install a dehumidifier or insulation layer (to prevent dew formation) for high-humidity working conditions.

4. Select appropriate filter materials and wind speed:

 Use filter bags with good air permeability (e.g., polyester, PPS); control the filtration wind speed within a reasonable range (0.6-1.2m/min) to avoid excessive wind speed causing dust penetration and blockage.

5. Regularly clean the ash hopper: 

Clean the ash hopper every day to avoid ash accumulation and backflow (backflow dust will block the filter bag). For easy-to-harden dust, install a heating device in the ash hopper.

6. Inspect and clean filter bags regularly: 

Check the filter bag every week; clean or replace bags with excessive dust accumulation in a timely manner. For long-term operation, perform off-line cleaning of filter bags every 3-6 months.