How to Enhance the Sieving Effect of a Swing Screen?

Select Appropriate Screen Mesh

To maximize sieving efficiency, choosing the correct screen mesh is essential. The mesh should correspond to the particle size distribution of the material to be sieved. For materials with uneven particle sizes, multilayer screens with gradually smaller-sized apertures can be used for stepwise screening. The material of the screen mesh also matters. For corrosive materials, use stainless steel mesh. For abrasive materials, use polyurethan mesh, which has better wear resistance. Also, ensure the mesh is properly tensioned, as loose mesh can lead to material pile up, which hinders the process of screening.

Change the Operating Parameters of the Swing Screen  

The operating parameters affect the sieving effect. The material characteristics will determine the required changes to the amplitude and the frequency of the swing motion. When dealing with fine and light materials, setting a smaller amplitude with a higher frequency will help to avoid material adhesion and enhance penetration. Whereas, larger and heavier particles will require a larger amplitude and a lower frequency to convey the material smoothly and avoid clogging. The angle of the screen surface is also very important. A reasonable inclination angle will enhance the flow of the material, but will still maintain proper contact time between the particles and the screen mesh. Test runs with different combinations of parameters will be required to determine the optimal setting for particular materials.

Enhance Material Distribution Techniques

To achieve even screening, proper feeding is critical. The user must feed the over width sufficiently over the entire screen because excessive feeding can cause local overloading. The use of feeding hoppers with distributing devices can aid achieving proper even distribution. Controlling the feed rate is also essential. Excess feeding will cause the material to build up and saturate the screen, taking away the available area that can be used to screen the material. Mostly low feeding will result in inefficiencies in production. An appropriate and steady feeding rate will allow every one of the screening particles the opportunity to pass the screen mesh, leading to even screening.  

Perform Routine Cleaning and Maintenance  

The maintenance and cleaning of the swing screens performace is paramount. The anunces of rest and material build up on the screen mesh will cause the mesh to be of less efficacy, and reduce the screen toiling efficacy. During operation of the swing screens incorporate appropriate cleaning methods, such as air jet cleaning and brushing, to rest and reduce the anunces of material build up. After extensive use, the screen mesh will need repairing and replacement. For the parts of the swing screens that move, cleaning and lubrication provides rest to the mesh and will reduce wear. This will increase stability of the sieving performance.

Think about material preprocessing

Material preprocessing done before sieving can positively affect material sieving.

High moisture food material that does not agglomerate as easily can be dried to break up agglomerates and improve food material fluidity. Large impurities can be removed through pre-screening, manual sorting, or some other technique to prevent damage to the screening mesh and blockage of equipment.

In addition, optimizing the material temperature and humidity can improve the adhesion between the agglomerates and the screening surface, allowing for more effective ad screening.