How to use industrial dust filter bags correctly?

Industrial dust filter bags are the core components of the dust removal system. Correct use can significantly improve dust removal efficiency, extend service life and reduce operation and maintenance costs. The following is a professional user guide:

1. Selection and Installation Specifications
Dust Characteristics Analysis
Particle Size Distribution: Ultrafine dust (such as PM2.5) requires coated PTFE filter bags
Chemical Properties: Acidic gases should use PPS + PTFE blended filter media
Humidity Range: Moisture content > 10% requires waterproof and oil-proof treatment

Working Parameter Compatibility
Temperature Resistance: Conventional polyester (130°C), Metas (204°C), P84 (260°C)
Filter Air Velocity: Pulse backflush recommended: 0.8-1.2 m/min, mechanical vibration recommended: ≤0.6 m/min

Pre-Installation Treatment
Perform 24-hour constant temperature and humidity pre-treatment (temperature 60±5°C, humidity 45±5%)
Installation tension: 150-200 N/bag (Φ160mm standard bag)

Sealing Installation
Triple sealing structure: spring expansion ring + silicone gasket + stainless steel clamp
Flat panel flatness deviation ≤2 mm/m²

2. Functions of Industrial Dust Filter Bags
Highly Efficient Particulate Matter Capture
Industrial dust filter bags can capture dust particles ranging from coarse to submicron, including PM10, PM2.5, and even finer. Conventional filter bags can filter dust particles larger than 1 μm, while coated or nanofiber filter bags can capture ultrafine particles smaller than 0.3 μm, with filtration efficiencies exceeding 99.99%. In high-dust environments such as cement plants and steel mills, filter bags can effectively reduce emission concentrations and meet environmental standards.

Protect Equipment and Reduce Energy Consumption
Extend Equipment Life: Filter bags prevent abrasive dust (such as mineral dust and metal particles) from entering fans and ducts, reducing equipment wear and lowering maintenance costs.
Energy Saving and Consumption Reduction: High-quality filter bags have low initial resistance (e.g., <500Pa). When combined with an intelligent dust cleaning system, they can reduce fan energy consumption by over 15%.

Resource Recovery and Environmental Compliance
Dust Recycling: In industries such as cement, metallurgy, and chemicals, filter bags efficiently collect valuable dust (such as zinc dust, carbon dust, and cement raw materials), enabling resource recycling.
Meet Emission Standards: Filter bag dust removal can reduce emission concentrations to below 10mg/m³, or even below 5mg/m³, complying with stringent regulations such as China's Ultra-Low Emission Standards and the EU's BAT standards.

3. Troubleshooting and Countermeasures
Filter Bag Clog
Causes:
High dust humidity and oil content
Incomplete dust cleaning or oil/water content in the compressed air
Solution:
Increase preheating (flue gas temperature > dew point + 15°C)
Use waterproof and oil-resistant filter bags (such as PTFE-coated)
Check the air compressor to ensure the compressed air is dry

Damaged Filter Bags
Common Damage Locations:
Bag opening: Improper frame installation or air flow scouring
Bag body: Burrs on the frame, excessive dust cleaning, or chemical corrosion
Troubleshooting:
Replace damaged filter bags and inspect adjacent filter bags for damage
Adjust airflow distribution to avoid localized high-speed scouring

Abnormal Emissions (Dust Emissions)
Troubleshooting Steps:
Check the vent plate seal for leaks or loose clamps
Inspect the filter bags for damage or incorrect installation
Check the bypass valve for accidental opening, causing a flue gas short-circuit