Screw press 

Screw press is a common mechanical equipment used to separate the liquid in the material, so as to achieve the purpose of dehydration. Its working principle is based on the rotating motion of the screw and the action of pressing force, and it is suitable for many fields, such as food processing, agriculture and environmental protection. This article will introduce the working process of the screw press in detail.

1. Raw material feeding

The first step in the working process is to put the raw material containing liquid into the screw press through the feeding port. These raw materials can be vegetables, fruits, sludge, etc., and they usually contain a certain proportion of water.

2. Screw conveying and pressing

Once the raw material enters the screw press, the screw starts to rotate. The rotating motion of the screw gradually pushes the raw material towards the outlet of the screw. During this process, the pitch of the screw gradually decreases, causing the raw material to be squeezed in the screw cavity.

As the screw pitch gradually decreases, the raw material is subjected to gradually increasing pressure in the screw cavity. This pressure causes the liquid in the raw material to be separated, squeezed to the outside of the screw, and discharged through the pores in the wall of the screw cavity. At the same time, the solid part of the raw material is gradually compressed, reducing its water content.

3. Liquid discharge

The separated liquid is discharged out of the screw press through the pores on the wall of the screw cavity. A collection tank or pipe is usually provided to collect this drained liquid. These liquids may be fruit juices, vegetable juices, sewage, etc. According to different application fields, the properties of the liquids will be different.

4. Solid discharge

After pressing, the solid part of the raw material becomes denser and has a lower water content. These solid residues are gradually discharged from the outlet of the screw press as the screw advances. These solid residues can be used as feed, fertilizer or further processing raw materials, and the specific use depends on the type of raw materials and the properties after dehydration.

5. Cleaning and maintenance

The screw press needs to be cleaned and maintained after a period of use to maintain its working efficiency and stability. This includes cleaning the screw, replacing worn parts, and checking the mechanical structure. Regular maintenance can prolong the service life of equipment and ensure product quality.

in conclusion

The screw press separates the liquid in the raw material through the rotation of the screw and the action of the pressing force, so as to achieve the purpose of dehydration. This working principle is widely used in fields such as food processing, agriculture and environmental protection, providing efficient dehydration solutions for these industries. When using a screw press, regular care and maintenance is key to ensuring its proper functioning.

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