Dust Collector bag|Dust Filter Bag

1. Overview

The Dust Filter Bag, also known as filter sleeve or dust collector bag, is the key filtering component of baghouse dust collectors. It acts as the barrier medium to intercept fine particulate dust in dust-laden airflow. Different from pleated filter cartridges, the tubular filter bag adopts needle-punched felt material with deep filtration structure. With various surface finishing treatments such as singeing, calendaring, PTFE coating and water-oil repellent, it solves common problems including bag abrasion, moisture sticking, high-temperature corrosion and static explosion risk. As the most critical consumable for dust removal systems, it directly determines emission effect, running resistance and overall service life of the bag filter.

2. Working Principle

Dust-laden flue gas passes through the outer surface of the filter bag; coarse dust is blocked on the outer felt layer, while fine particles are trapped inside the fiber gap to form a stable dust cake. The dust cake further improves fine dust filtration accuracy. Clean air penetrates the bag wall and discharges upward. During pulse jet cleaning, high-pressure air shock vibrates the bag body to peel off the dust cake, which falls into the ash hopper for discharge by airlock valves. The treated filter bag recovers low resistance and continues cyclic filtration operation.

3. Core Features & Advantages

- Multi-Material Grade Selection: Polyester, PPS, PTFE, Fiberglass available for normal, high-temperature and corrosive working conditions.

- Advanced Surface Treatment: Singeing, calendaring, PTFE coating, anti-static, oil & water repellent to prevent dust adhesion and moisture hardening.

- High Filtration Precision: Captures PM2.5 fine dust stably, supporting exhaust emission ≤20mg/Nm³ environmental standard.

- Excellent Air Permeability: Optimized needle-punched felt structure keeps low operating resistance to reduce fan power consumption.

- High Mechanical Strength: Tensile & tear resistant fabric, resistant to pulse airflow impact and abrasive dust scouring.

- Explosion-Proof Safety Option: Carbon fiber blended anti-static filter bags for combustible dust working conditions.

- Custom Size & Seam: Custom diameter, length, bottom shape and top cuff design to match all brand baghouses.

4. Main Technical Specifications

5. Application Industries

- Thermal Power Plant: PPS filter bags for boiler flue gas desulfurization and dust removal

- Cement Industry: Polyester / fiberglass bags for kiln tail and raw mill dust collection

- Waste Incineration: PTFE anti-corrosion bags for toxic and corrosive flue gas

- Metallurgy & Mining: High-strength wear-resistant bags for abrasive ore dust filtration

- Wood & Grain: Anti-static explosion-proof filter sleeves for combustible fine dust

- Chemical Industry: Acid-alkali resistant filter bags for corrosive industrial exhaust gas

6. Customization Service

We provide fully customized dust filter bag solutions. Customizable options include material grade selection, PTFE coating, anti-static treatment, oil-water repellent finishing, tube diameter/length, top cuff type (ring band, snap band, flat mouth), bottom structure and sewing process. All filter bags are tested for air permeability, tensile strength and temperature resistance before delivery, compatible with all types of pulse jet baghouse dust collectors worldwide.