Application & Development of Vibrating Screen in Food Industry

Application & Development of Vibrating Screen in Food Industry

Vibrating screen used in food industry is a kind of high efficiency screening machinery for high precision fine powder and other materials , which is easy to operate, fully enclosed structure, suitable for granular, powder, mucus and other materials screening and filtering classification. 

Such as powdered sugar, starch, salt, rice flour, milk powder, milk, egg, soy sauce, vinegar, fruit juice, papaya powder, green tea powder, kudzu powder, and potato processing production which are commonly used in daily life,vibrating screen will be a good helper. 

Take starch or rice powder as example, usually the first procedures : impurity removal of raw materials - screening-weighing;secondly , soaking- coarse grinding-germ separation-fine grinding-screening of starch-protein separation-centrifugal dewatering- thermostatic drying, lastly,weighing-product packing. We can not imagine how to deal with the screening in the process of food without vibrating screen. Vibrating screen overcomes the difficulty of fine material screening easily, which also makes food diversified and entire food industry develop rapidly.

Mentioned Points on Vibrating Feeder

Mentioned Points on Vibrating Feeder

1. In order to ensure feed materials uniformly and prevent materials flow automatically, the vibrating feeder should be installed horizontally. If feeding ordinary materials, users can install the feeder declined 10 degree; declined 15 degree is alright if dealt with viscous material or larger water content materials.

2. There should be 20mm moving clearance after installing vibrating feeder. Suspension device should adopt flexible connections.

3. Please tighten all bolts before commissioning with non-load, especially the vibration motor bolt. It’s better to tighten the bolts again after 3-5 hours of continuous operation.

4. When making a commissioning, two vibration motors must rotate reversely. Inspect the stability of current and noise, please stop it if there is abnormal situation.

5. Please add lubricating grease to motor bearings every 2 months. During hot season, every month should be added.

Possible Reasons Cause Linear Vibrating Screen Mesh Blocking

Possible Reasons Cause Linear Vibrating Screen Mesh Blocking

Due to different material properties, their shape is also different, so it will generate all kinds of mesh blocking forms. Her PK Machinery analyzes the reasons lead to this kind of problem, please see the following points:

1.It contains a large number of particles which approaches the point of separation.

2.Water content of materials are too high.

3.Spherical particles or materials have multiple contact points with sieve.

4.Materials can occur static electricity.

5.Material has fibrous attribute.

6.There are many flaky grain.

7.Wire diameter of woven mesh is too thick.

8.Hole-shaped of mesh sieve design is unreasonable, making particles get stuck.

Screen Sesame, Prefer Linear Vibrating Screen

Screen Sesame, Prefer Linear Vibrating Screen

Previously, most of farmers always let sesame shell dry in the sun, the the sesame will come out naturally. For the purpose of improving the separation efficiency, we recommend linear vibrating screen to our customer. Linear vibrating screen is mainly used to solve screening problem of particulate material, it can separate sesame shell and sesame seeds successfully.

With regards to this vibrating screen, materials are discharged to inlet of linear vibrating screen from vibrating feeder evenly. After that, materials can pass through different size mesh to generate different specification materials and be discharged from different outlet. It has features of low consumption, high productivity, simple structure, easy to maintain, total-enclosed, discharge material automatically, etc. The highest screening mesh is 400 meshes, can screen 7 different particle size of materials.

Operating Principle and Property of star discharger

Operating Principle and Property of Star Discharger

Star discharger is a device that store or feed materials. Typically, star discharger is made with rotary wheel with a number of rotor blades, housing, seals, reducer, motor and other components.

Operating principle of star discharger: when star discharger works, dust falls by gravity, then it will be full of star blade space both top and side. Blade rotor of star discharge is rotated by drive motor through reducer, then the impeller will move to the bottom and dust will be discharged by their own weight.

In the outlet of bag filter and cyclone dust collector is equipped with a star discharger, it can discharge the dust timely and ensure air tightness of dust removal system. Star discharger is the most advanced discharging device, commonly used in dust removal system as the most important equipment, which is particularly suitable for dust, small particle materials, so it has been widely used in metallurgy, chemical industry, food, cement, drying equipment and other industrial sector projects.

Different Types of Screen Mesh

Different Types of Screen Mesh

Vibration screen mesh plays a very important role in vibration screen. If users choose a wrong size screen mesh, it will affect screening efficiency. What’s worse, it will damage mesh. Here we will introduce different types screen mesh.

Woven screen: It is mainly used to screen materials with small proportion. Common materials of woven screen are stainless steel, low carbon wire mesh, galvanized wire mesh and wire screen mesh. According to different material particle size, density, capacity, material characteristics, users can select different screen mesh, mesh size, wire diameter size.

Punching screen: Its main lifespan is related to its thickness. Different mesh number should be matched with different sheet thickness. The most important advantages of punching screen is that it can determine mesh shape of punching screen according to the shape of materials.

Welding screen: It is used to screen ore, coal, etc. Screen mesh is welded by steel plate.

Small Part has Great Effect: Damper

Small Part has Great Effect: Damper

Do you really know vibrating screen damper? It is used to limit circular vibrating screen to move lateral. You might confuse that does vibrating screen have lateral move? Theoretically it doesn’t have, but it is proved that there exists this kind of situation, the reasons are as follows:

1.Uneven distribution screening materials: If the material distributes unevenly, it will result screen box in a uneven loading condition, so there will be shock deviation in the horizontal direction.

2.Installation deviation. Circular vibrating screen needs to be installed horizontally. But during the installation process, it will inevitably be installation errors.

3.Stress error of vibration spring. We all know that measuring standard of vibration spring is just a reference value. So it is inevitable that vibration springs have stress error.

Screen box appears lateral deviation shock will generate great damage, thus if not promptly treated, it can affect the circular vibrating screen normal working.

How to avoid this situation? Here PK Machinery introduces a key component of circular vibrating sieve, that is damper.

As it is shown, the damper consists of adjustment bolts, flanges, spring base, springs, rubber base and rubber. When the screen box appears lateral deviation shock, its inside spring will generate a reverse thrust to screen box, and thus to limit screen box to move lateral and avoid the occurrence of lateral deviation.