Screening system
- This system adopts swinging screens with a cam design instead of vibration screens with a motor design to avoid bouncing and breaking BPA prills.
- During the screening process, elastic balls roll and bounce under the screen to collide with the BPA prills clogged in the screen and free them up. By doing so, these balls unclog the screen to enhance productivity and extend the cycle time for screen cleaning.
- The system adopts a nitrogen inlet with a slight pressure to prevent dust explosion during the screening process and ensure safe production.
- The downstream equipment of this system is a bisphenol A conveying system. Therefore, the large prill discharge pipe cannot be fully opened for normal discharge since it leads to nitrogen leakage. To prevent leakage, a double-valve discharge control unit is adapted to avoid such production safety issues.
- The non-defective product outlet of the screening machine is equipped with a set of rotary valves to prevent nitrogen leakage and stabilize the discharge of BPA into the basket conveyor.
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A set of pneumatic samplers is installed under the screening unit for sampling by quality control personnel.