Что такое фильтровальный мешок?
The material selection of the dust collection filter bag (also known as the “dust removal filter bag”) directly determines the efficiency and service life of the dust removal equipment. Dust collection filter bag is an efficient filtering material made of materials such as polyester short fiber, PPS fiber, polypropylene (PP), aramid fiber, and P84 fiber. Their service life is usually 2-4 years, with good breathability, high dust capture efficiency, easy cleaning, and a dust removal efficiency of up to 98.99%, effectively filtering PM2.5 particles.
How Dust Collection Filter Bags Work?
The filter bag is the “heart” of the bag filter, usually cylindrical and vertically hung inside the dust collector. The dusty gas enters from the air inlet and first hits the baffle of the ash hopper. Large particles fall directly into the ash hopper due to inertia, and the remaining dust passes through the filter bag area with the airflow. At this point, most of the dust will be “caught” by the surface of the filter bag, and clean air will enter the inside of the filter bag through the fiber gaps, and finally be discharged from the air outlet. There are cage bones inside the filter bag to support it and prevent it from collapsing, while also helping to shake off accumulated dust.
Performance Comparison of Dust Collection Bag Materials
- The surface of the polyester filter bag is smooth and suitable for high airflow woven fabrics, thereby enhancing the dust removal effect.
- Improve breathability, reduce dust adhesion and operational resistance while ensuring high filtration accuracy.
- It has the characteristics of high porosity, large air volume, high dust collection efficiency, and long service life.
- Moderate temperature resistance (up to 150 ° C instantly), good acid and alkali resistance, and excellent wear resistance.
Industry Applications:
✓ Dust removal in cement plant
✓ Dust control in the wood processing industry
✓ Dust removal in the food industry
2. Polypropylene (PP) Filter Bags
Main features:
- Suitable for acidic/alkaline environments (resistant to pH values 1-14)
- Provide anti-static options
- Economically efficient (15-20% cheaper than polyester fiber)
Typical applications:
✓ Acid mist treatment in electroplating plant
✓ Dust removal in chemical workshop
✓Battery production workshop
Technical Parameters:
- Continuous operating temperature: 200-240 ° C
- Oxygen index>29% (high flame retardancy)
- The service life is 3-5 times longer than that of standard materials
Required Applications:
✓ Dust removal for sintering machine in steel plant
✓ Carbon black production line
✓ Asphalt smoke treatment
Performance Benchmark:
- Best corrosion resistance (resistance to sulfur oxides, resistance to nitrogen oxides)
- Can operate continuously at 190 ° C
- Standard materials for waste incineration plants
Procurement Recommendations:
❗ Essential for coal-fired power plants
❗ First choice for hazardous waste incineration
❗ Urban garbage power station
1. Exceptional Dust Removal Efficiency:
- PTFE membrane-coated filter bags achieve 99.99% filtration efficiency due to their unique structure.
2. Wide Environmental Adaptability:
- Resistant to high and low temperatures, condensation, and chemical corrosion.
- Excellent performance in high concentration, high humidity, and fine particulate dust environments.
3. Excellent Air Permeability:
- Breathability: 3-6m ³/m ² · min, exceeding actual requirements.
How to Choose the Right Dust Collection Bag Material?
1.Based on Operating Temperature
- The heat resistance of different materials varies. For high-temperature flue gas, please choose aramid or PPS.
2.Based on Gas Properties
- For acidic/alkaline gases, please choose materials that are resistant to chemical corrosion, such as PP or PPS.
3.Based on Filtration Efficiency Requirements
- For higher efficiency, please choose polyester or PPS.
4.Consider Cost Factors
- Balance performance and budget, find the most cost-effective solution
Резюме
- Common misconception: The higher the weight, the better the performance (tests have shown that 500 g/m ² filter bags are 12% more efficient than 550 g/m ² filter bags).
- Trend in 2024: The market share of hybrid filter bags (such as PPS+PTFE) has increased by 35%.
- Maintenance tip: Optimal pulse pressure: 0.4-0.6 MPa (exceeding this pressure will shorten the service life by 30%).
The choice of dust collection bag material directly impacts the dust collector’s performance and longevity. Consider temperature, gas properties, filtration needs, and cost for the best selection.Связаться с нами—Our engineers will tailor the optimal solution for you.
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