Rotary Drum Screen Cylinder For Sugar Processing

Description

Rotary drum screen as an mechanical filtration device which widely used in sugar mills, it is primarily used to separate sugar crystals from the syrup or molasses.The drum rotary screen typically consists of a cylindrical drum made of perforated or wedge wire screens, which rotates around its axis. The screen’s openings allow smaller particles to pass through while retaining larger particles, thus achieving separation.

Working Principle

Feeding the slurry: The sugar slurry, which is a mixture of sugar crystals and syrup or molasses, is introduced into the drum rotary screen.  The slurry can be fed either through a central inlet or a specially designed distributor system to ensure even distribution along the drum’s length.

Screening: As the drum rotates, the slurry flows through the screen’s openings. The sugar crystals, being larger than the screen’s openings, are retained inside the drum,  while the syrup or molasses, along with smaller impurities, pass through and are collected separately.

Discharge: The sugar crystals retained within the drum are eventually discharged from one end of the drum, typically through a chute or a screw conveyor system.  The discharged sugar crystals are then sent for further processing, such as drying or packaging.

Cleaning: To prevent clogging and ensure efficient operation, the drum rotary screen often includes a cleaning system, such as brushes or spray nozzles, to remove any accumulated sugar crystals or impurities from the screen’s surface.

Advantages

Efficient separation of sugar crystals from syrup or molasses.

Continuous operation, resulting in high throughput.

Low maintenance and operational costs.

Flexible design, allowing for easy customization according to specific requirements.