PTFE Dust Collection Filter Bags

PTFE is a fiber with extremely stable chemical properties, capable of withstanding continuous operating temperatures of 260°C or higher and instantaneous temperatures of up to 280°C. It exhibits outstanding resistance to strong acids and corrosion and can withstand corrosion from various strong oxidizing agents: It has excellent hydrolytic stability, is virtually non-flammable, and possesses outstanding electrical insulation, thermal insulation, and light stability. With a low coefficient of friction and minimal adhesion, it can withstand harsh operating conditions involving strong acids and alkalis, and typically has a service life of over 4 years.

PTFE film features a large number of continuous micropores (typical pore size 0.2–1 μm), enabling surface filtration. Dust cannot penetrate the film and remains entirely on the surface of the filter media; this distinguishes it from conventional filter media that rely on depth filtration.

Advantages

1. Ultra-high filtration efficiency, suitable for ultra-low emissions: Filtration efficiency for dust ≥0.3 μm is ≥99.99%, with stable outlet dust levels ≤5 mg/Nm³; The preferred choice for ultrafine dust, carbon black, iron oxide dust, lithium battery powders, coal gas dust removal, and kiln emission standard upgrades; suitable for downstream integration with TRT systems and fan blade protection.
2. Excellent dust-shaking performance and stable long-term pressure drop: Dust does not penetrate the filter felt; after pulse-jet cleaning, the dust cake detaches in one piece; With ordinary non-coated filter media, dust becomes embedded in the felt during long-term operation, causing the pressure drop to rise continuously.
3. Non-stick, hydrophobic, and resistant to mildly adhesive dust: PTFE has extremely low surface energy and is inherently hydrophobic; compared to ordinary filter media, it is less prone to bag clogging; it offers superior adaptability in environments with low levels of moisture and mildly adhesive dust.
4. High chemical inertness (of the film itself): The film is resistant to strong acids, strong alkalis, and oxidizing agents; corrosion damage occurs only in the underlying base fabric fibers, while the film itself is highly resistant to corrosion.
5. Can be modified with anti-static, water-repellent, and oil-repellent properties: Conductive fibers are blended into the base fabric to create anti-static coated filter bags, used for explosion-proof dust collection in applications involving pulverized coal, blast furnace gas, and combustible powders.
6. Continuous operating temperature: 240–260°C; peak temperature: 280°C
7. Exceptional resistance to strong acids, strong alkalis, strong oxidizing agents, hydrolysis, and oxidation; virtually unaffected by flue gas corrosion

Suitable for high-sulfur smelting and highly corrosive incineration flue gases