How does a rotary drum screen work?

As an advanced solid-liquid separation equipment, rotary drum screen is widely used in water treatment, chemical industry, food and beverage and other industries. It uses specially designed filter media and fluid dynamics principles to effectively remove tiny particles in liquids, improve water quality or recover valuable solid substances.

Working principle of rotary drum screen machine

1. Filter media and interception mechanism.

The core part of the rotary drum screen machine is its precision filter media, which is usually made of stainless steel wire mesh, fiber or other porous materials. These media have a specific pore size range and can intercept tiny particles and suspended matter in the liquid.

When the liquid to be treated passes through the filter medium, particles larger than the pore size of the medium are retained on the surface of the medium to form a filter cake, while particles smaller than the pore size pass through the medium with the liquid to achieve the purpose of solid-liquid separation.

2. Fluid dynamics optimization.

The design of the rotary drum screen machine fully considers the principles of fluid dynamics, and ensures that the liquid maintains uniform flow during the filtration process by optimizing the flow channel structure and flow rate distribution. This design not only improves the filtration efficiency, but also reduces the risk of medium blockage and extends the service life of the equipment.

3. Backwashing and regeneration.

As the filtration process proceeds, the filter cake on the surface of the medium gradually thickens, resulting in increased filtration resistance. At this time, the backwash system equipped with the microfilter starts to work. The backwash system applies reverse water flow or air flow to the medium to peel off the filter cake from the surface of the medium and discharge it through the sewage outlet.

This process not only restores the filtering performance of the medium, but also realizes the continuous operation and automatic control of the equipment.

With its unique working principle and excellent filtering performance, the rotary drum screen plays an important role in modern industry and environmental protection.

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Nina

Email: nina@filtrationchina.com

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