Filter bags for asphalt mixing plants are typically made from materials such as Nomex (aramid), PPS, or PTFE that can withstand the high temperatures and harsh conditions found in these plants. These filter bags capture particulate matter and prevent it from being released into the air during the asphalt production process.
Materials
- Nomex (Aramid) needle felt.
- PTFE(Polytetrafluoroethylene) needle felt.
- Fiberglass needle felt.
- P84 (Polyimide) needle felt.
Description
Filter media in asphalt mixing plants are exposed to extreme environmental conditions and aggressive corrosive gases. Frequent temperature fluctuations and business creation and stops with different fuels and the resulting potential sparks put additional pressure on the filter media.
Asphalt concrete mixing equipment have a first dust filter and secondary filter. Usually with only a small mixing factory need equipment dust; large mixing equipment have two-stage filteration for achieving the environmental dust requirements., As general, the first filtration is gravity or centrifugal dry scrubbers, wet dust is often two or dust bag . After wet dust back up to 400mg / m3, bag house dust back up to 50mg / m3. Early asphalt mixing plant is configured to filter out dry cyclone dust. Due to the dry cyclone dust can only remove large particles (> 5 μm) dust, and the dust content of large particles of dust rarely. Massive emissions of less than 5μm fine dust. With the development of improved environmental requirements and dust removal technology, asphalt mixing equipment to achieve only through secondary dust emissions requirements. The secondary dedusting methods are two kinds of wet dust bag, dust to take a different way according to different requirements. First dust collector There is a cyclone dust collector, dust collector and two kinds of gravity. Cyclone simple structure, which is cylindrical dust collecting means, the air flow tangential entry, the dust is separated by centrifugal force. Cyclones can collect more than 5μm particle size of the dust collection efficiency is generally 5% to 85%. Gravity dust is reduced by the expansion tank of gas flow rate, by gravity so that large dust particles fall, trapping particles greater than 40μm in general.
Materials and Performance
| Material | Temperature Resistance |
Chemical Resistance | Durability |
| Nomex (Aramid) | Up to 200°C (392°F) | Moderate | High |
| PPS (Polyphenylene Sulfide) | Up to 190°C (374°F) | Excellent (acid/alkali resistant) | High |
| PTFE(Polytetrafluoroethylene) | Up to 260°C (500°F) | Outstanding (chemically inert) | Very High |
| Fiberglass | Up to 260°C (500°F) | Moderate (not good in acidic/alkaline environments) | Moderate |
| P84 (Polyimide) | Up to 260°C (500°F) | Excellent (acidand hydrolysis resistant) | Very High |
Typical Operating Conditions
- Cont. Temperature (°C): 100-200°C.
- Peak Temperature (°C): Orientation to the maximum peak temperature of the fiber polymers used.
- Dust: Asphalt, minerals.
- Dust Properties: Abrasive.
- Dust Source: Dryer, mixer, rotary kiln.
- Harmful Gases: NOx, SOx Cleaning Process:Pulse jet, reverse air Fuels:Bio gas, fuel oil, heavy oil, liquid gas, natural gas, pulverised lignite.
Choose Filmia® Filtration Solutions
Depends on the composition and operating conditions of dust, Filmedia® offers technically and economically optimal media solution for dedusting filter your asphalt mixing plant .
- Multiple filter media options: We offer you a wide range of filter media to customize your filtration solution, each designed to meet specific operational needs and increase efficiency.
- Effective filtration for all conditions: Whether dealing with abrasive, corrosive, hot or explosive dusts, our filter bags ensure optimal performance and safety.
- Focus on demanding industries: We focus on industries that require stringent filtration, and our products are designed to meet the highest demands and challenges.
- Enhanced performance and service life: Experience superior dust filtration with our advanced filter bags, designed to extend the life and efficiency of your filtration system.
