Shaker Filter Bags

Description

Working Principle of Shaker Filter Bags

Shaker filter bags are a type of dust collection technology that relies on mechanical vibration for cleaning. Their working principle involves generating periodic vibrations in the filter bags, either during operation or when the dust collector is offline, causing the dust adhering to the bag surface to loosen and fall off. Common vibration methods include top vibration, middle vibration, and bottom vibration. Shaker cleaning ensures effective dust removal while minimizing secondary dust emission, making it especially suitable for handling fragile or larger dust particles.

Dust Removal Process

Air enters the dust collector through the inlet and is evenly blown downwards by the distribution plate above the filter bags. Dust particles are deposited in the filter bags along with the air, while clean air is discharged from the top of the filter bags through the outlet duct. As the dust collector operates, dust particles continuously adhere to the surface of the filter bags, gradually increasing the filter bag resistance and affecting airflow and dust removal efficiency. Therefore, it is necessary to periodically shake and clean the dust, that is, to shake off the dust particles adhering to the surface of the filter bags, allowing the dust to fall into the dust collection box below, restoring the surface of the filter bags to a clean state, thereby maintaining the normal operation of the dust collector.

Why Choose Shaking for Dust Removal?

• Simple and Efficient

Shaker filter systems have a relatively simple structure and do not require complex pulse jet systems or compressed air equipment. They mainly consist of a mechanical vibration device and a transmission mechanism, resulting in lower manufacturing and maintenance costs.

• Gentle Dust Cleaning

For delicate or easily broken dust, mechanical vibration provides a gentle cleaning method, avoiding filter bag damage or secondary dust release caused by strong impacts.

• Easy Maintenance

The vibration mechanism is structurally simple, making routine maintenance and repairs easier, thereby reducing long-term operational costs.

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Advantages of Needle Felt Dust Collection Filter Bags

Needle-punched felt filter fabric is a nonwoven fabric manufactured through a needle-punching process and is widely used for air, liquid, or gas filtration. Its main features are its strong mechanical strength and high filtration efficiency, making it particularly suitable for dust collection applications in various industrial fields.

1. High Filtration Efficiency

Needle felt features a three-dimensional, interlaced structure with high porosity. The fibers create a complex “maze effect” that effectively captures fine dust particles.

Post-treatments such as calendaring, singeing, or membrane lamination further enhance surface smoothness and filtration precision, achieving 1–5 micron level efficiency.

2. Balance of Air Permeability and Pressure Drop

The evenly distributed pores between fibers allow needle felt to maintain good air permeability while ensuring high filtration efficiency.

Under the same airflow, needle felt filter bags exhibit lower operating resistance, reducing fan energy consumption and extending service life.

3. Excellent Dust Release Performance

With surface treatments like singeing or heat-setting, dust is less likely to penetrate deep into the fiber layer, making it easier to remove during cleaning and reducing the risk of clogging.

Suitable for various cleaning methods, including mechanical shaking, reverse air, or pulse-jet cleaning.

4. Temperature and Chemical Resistance

Standard polyester (PE) needle felt can withstand continuous operating temperatures of about 130–150℃.

Advanced materials such as PPS, aramid, P84, and PTFE needle felts can handle 200–280℃ high-temperature flue gas, meeting diverse industrial requirements.

Strong resistance to acids, alkalis, and oxidation makes it suitable for complex gas conditions in industries like chemicals, cement, metallurgy, and power generation.

5. High Mechanical Strength and Long Service Life

The interlaced and tightly bonded fibers give needle felt excellent tensile strength and dimensional stability.

Filter bags resist tearing and deformation under high air velocity, with a typical service life of 1–3 years, lowering maintenance costs.

6. Flexible Customization

Can be tailored to various dust collector models with different diameters, lengths, and top/bottom configurations.

Surface treatments such as PTFE membrane lamination, antistatic fiber blending, or water/oil repellent finishing are available to meet specific dust and process requirements.

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Materials & Properties of Dust Collector Filter Bags

Filmedia® provides customized filter media in various categories, precisely matching the dust characteristics and working conditions of different industries

Material	Working Temperature	Instant Temperature	Abrasion Resistance	Hydrolysis Resistance	Acid Resistance	Alkali Resistance	Oxidation Resistance
Polyprolene Needle Felt	90℃	110℃	Good	Excellent	Excellent	Excellent	Middle
Acrylic Needle Felt	120℃	130℃	Middle	Good	Good	Middle	Good
Polyester Needle Felt	130℃	150℃	Excellent	Poor	Middle	Fair	Good
PPS Needle Felt	180℃	200℃	Good	Excellent	Excellent	Excellent	Fair
Aramid Needle Felt	204℃	220℃	Good	Middle	Middle	Good	Middle
P84 Needle Felt	240℃	260℃	Good	Middle	Middle	Middle	Good
PTFE Needle felt	250℃	280℃	Good	Excellent	Excellent	Excellent	Excellent
Fiberglass Needle Felt	250℃	280℃	Fair	Good	Middle	Fair	Good

Application scenarios

• Industrial environments with larger, less sticky dust particles.
• Situations where intensive dust cleaning is not required.
• Small-scale dust collection systems, such as grain processing, woodworking, and metal processing.
• Enterprises looking to reduce equipment maintenance costs.

Choose Filmedia®

Filmedia®, a professional manufacturer of dust collector filter bags, focuses on providing customized filter bag solutions for pulse jet, reverse air, and shaker dust collector systems. Leveraging advanced production equipment, high-quality raw materials, and optimized structural design, Filmedia® filter bags offer superior filtration efficiency, stable operating performance, and extended service life. Our products meet the needs of various industrial conditions, maintaining reliable and stable filtration performance even under high dust loads, varying temperature conditions, and complex chemical environments. With solid technical capabilities and a rigorous quality control system, Filmedia® is committed to providing global customers with cost-effective, durable, and reliable industrial filtration solutions.