Core Principles for Selecting Dust Filter Bags 

Principle of Ash Cleaning Adaptation: Synergy Between Ash Cleaning Method and Filter Bag Mechanical Properties

1. Pulse Jet Ash Cleaning

Select filter bags with high mechanical strength (e.g., polyester, PPS, aramid) to avoid substrate fracture caused by repeated expansion and contraction.

For membrane-coated filter bags, control the jet pressure (≤0.3MPa) to prevent membrane delamination.

2. Reverse Air Ash Cleaning

Prioritize needle-punched felt filter bags with high air permeability (e.g., polyester-acrylic composite filter media) to reduce reverse air energy consumption.

Avoid membrane-coated filter bags, as their low air permeability will lead to decreased ash cleaning efficiency.

Principle of Detail Supplement: Special Optimization for Specific Working Conditions

（1）Wear Resistance Requirements

For dust with sharp particles (e.g., ore, sand and gravel): Select polyester or PPS substrates with singed and calendered surfaces; avoid glass fiber filter bags to prevent leakage caused by brittle fracture.

For high-velocity working conditions (＞1.5m/min): Increase the filter bag weight (≥600g/m²) or adopt a double-layer structure to enhance wear resistance.

（2） Antistatic and Explosion-Proof Performance

For flammable and explosive dust (e.g., coal powder, aluminum powder): Must select antistatic filter bags (e.g., polyester filter bags with conductive fibers added) and ensure the grounding resistance ≤10⁸Ω to prevent explosions caused by electrostatic sparks.

Equip with explosion-proof dust collectors and explosion venting devices to establish multiple safety protections.

（3） Hydrolysis and Oil Resistance

For high-humidity and oil-containing dust (e.g., food processing, chemical waste gas): Select filter bags with water and oil repellent treatment (e.g., PPS impregnated with PTFE) to avoid filter bag clogging caused by dust adhesion.

Avoid PP filter bags, which are prone to hydrolysis in humid environments to generate carboxylic acid, leading to strength attenuation.