Facing the unique dust collection challenges, asphalt mixing plant operators need to invest in high-quality filter media that is specifically designed to handle the unique demands of asphalt production. This may include features such as abrasion and temperature resistance, fine particle-capturing filter media, and effective filtration systems.

Suitable Filter Media for Baghouse Filters

Selecting the right filter media is crucial for addressing these challenges effectively. Here are some of the most suitable filter media options for baghouse filters in asphalt mixing plants:

Polyester

• Properties: Moderate temperature resistance (up to 275°F / 135°C), good mechanical strength, and cost-effective.
• Applications: Suitable for lower-temperature applications and where cost is a significant factor, but may not be suitable for high-temperature conditions.

Polyphenylene Sulfide (PPS)

• Properties: Excellent chemical resistance, good heat resistance (up to 375°F / 190°C), and superior resistance to acidic and alkaline environments.
• Applications: Ideal for plants where chemical resistance is crucial and where temperatures are moderately high.

Aramid (Nomex®)

• Properties: Excellent heat resistance (up to 400°F / 200°C), good abrasion and chemical resistance.
• Applications: Ideal for high-temperature applications in asphalt plants, especially where there is a risk of temperature spikes.

Polyimide (P84®)

• Properties: High-temperature resistance (up to 500°F / 260°C), excellent dust release properties, and good chemical resistance.
• Applications: Used in high-temperature environments and where superior dust release is needed to prevent clogging.

Fiberglass

• Properties: Can withstand extremely high temperatures (up to 500°F / 260°C), good chemical resistance, but less flexible and more prone to abrasion.
• Applications: Suitable for very high-temperature applications and environments with chemically aggressive dust but requires careful handling to avoid damage.

Polytetrafluoroethylene (PTFE)

• Properties: Exceptional chemical resistance, can handle temperatures up to 500°F / 260°C, non-stick surface helps prevent clogging.
• Applications: Best for highly corrosive environments and high-temperature applications. PTFE membranes can also enhance filtration efficiency and service life.

Addressing Challenges with Suitable Filter Media

• High Temperatures: Aramid, fiberglass, PTFE, and polyimide are suitable for high-temperature conditions.
• Fine and Coarse Particles: Polyester and aramid can handle a range of particle sizes effectively, especially when used in conjunction with a pre-filter or secondary filter stage.
• Sticky and Oily Dust: PTFE and polyimide media provide non-stick surfaces, helping to prevent clogging and maintain airflow.
• Abrasion: Aramid and polyimide offer good abrasion resistance, extending the life of the filter bags.
• Moisture Variations: PTFE and PPS media are less affected by moisture and can maintain efficiency in variable humidity conditions.

For More Information

The challenges of dust collection in asphalt plants require a strategic approach to filter media selection. By understanding the specific conditions and demands of the plant, suitable filter media such as aramid, fiberglass, polyester, PPS, PTFE, and polyimide can be chosen to ensure efficient dust collection, regulatory compliance, and the longevity of the dust collection system.

As a leading filter media and filter bag manufacturer, Aokai Environtec custom makes high-performance and low-emission Filter Bags that are specifically designed and manufactured to meet the challenges that many asphalt mixing plants are facing. Contact Aokai for more information about our specific filter media and filter bags for the Asphalt Mixing Industry.