The vibrating screen prevents clogging through the following mechanisms:
High-frequency vibration: The ultrasonic system converts low-frequency electrical energy into mechanical vibrations of 36kHz or higher frequencies. This high-frequency vibration is transmitted to the screen, causing the screen to vibrate slightly. This vibration can destroy the electrostatic adsorption and adhesion between material particles, especially for ultrafine powders, making it difficult to adhere to the screen, thereby reducing clogging.
Micro-suspension state: High-frequency vibrations cause fine powders to form a micro-suspension on the screen. This reduces direct contact between particles and the screen, making it easier for particles to pass through the holes.
Secondary crushing effect: Ultrasonic vibrations help disperse agglomerated materials, preventing clumping and ensuring smooth screening.
Dynamic screen cleaning: Ultrasonic vibrations act on the screen itself, keeping pores clean. This ensures even the smallest particles pass through, preventing clogging.
Auxiliary cleaning design: Some ultrasonic vibrating screens use bouncing balls or rubber balls. These move with vibration to remove materials stuck in the screen holes.
Self-cleaning function: Adjusting the elasticity and vibration amplitude of the screen bars enables self-cleaning. This reduces material-screen contact and prevents blockage.
Accurate frequency adjustment: Adjusting the ultrasonic generator’s frequency ensures it matches material characteristics, preventing blockage without disrupting screening stability.
Additional Cleaning Methods
In conjunction with ultrasonic technology, other cleaning methods can be employed:
Mechanical Cleaning Devices: These include systems that use balls or brushes to physically dislodge particles from the mesh surface. While effective, these methods may not be as suitable for very fine materials compared to ultrasonic cleaning.
Water Sprays: Utilizing water sprays can help clear openings and prevent buildup of slurries; however, they may introduce additional costs and potential contamination issues.
Conclusion
In summary, the ultrasonic vibrating screen improves screening efficiency and reduces blockages through high-frequency vibration and auxiliary cleaning measures. It is ideal for processing fine powders and sticky materials, which traditional screens struggle to handle.
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