What equipment is used for flour screening and impurity removal

The purpose of sieving flour is mainly for removing impurities and sieving loose. Therefore, for different purposes, Dahan manufacturers recommend the following three types of vibrating screens for everyone to choose from. In addition, the editor of Dahan reminds everyone that because flour belongs to the food industry, you should choose a stainless steel vibrating screen to meet the hygienic standards of the food industry.

1, straight row sieve

In relatively large-scale flour production lines, such as flour mills, most of them use straight-row sieves to sieve the flour and remove impurities. The straight-line sieve uses a vibrating motor as the excitation source. After the flour enters the system, it is subjected to the force of the vibration source to make a three-dimensional rotating motion on the screen surface, so that the flour and agglomerates are fully dispersed, and the flour quickly enters the lower surface bin.

The energy consumption of the sealing performance of the straight row sieve can avoid dust during the sieving process of the flour, thereby ensuring the accuracy of the flour sieving. It can be used in single or multiple layers. It can be operated automatically and can be produced continuously for 24 hours, which is very suitable for flour. The rough removal of impurities and high output requirements.

2, linear vibrating screen

The linear vibrating screen is mainly used for simple classification and removal of impurities in flour.

The linear vibrating screen uses a vibrating motor as the source of vibration. When two vibrating motors rotate synchronously or in opposite directions, the excitation force generated by the eccentric mass cancels each other in the direction parallel to the axis of the motor, and is perpendicular to the motor. The directions of the shafts are superimposed into a resultant force, and the two motor shafts have an inclination angle relative to the sieve surface. Under the combined force of the exciting force and the gravity of the flour, the flour is thrown forward on the sieve surface to move in a straight line, thus completing the screening of the flour. And grading.

The linear vibrating screen can not only be used for impurity removal in one layer, but also in multi-layer classification. It can be divided into 6 different materials at a time. One machine can realize multiple functions. The screening and classification accuracy is more than 96% and the screening efficiency is high. , Adopting a fully enclosed structure, no dust spillage, automatic discharge, more suitable for the assembly line operation of flour.

3. Rotary vibrating screen

As a high-precision fine powder screening equipment, the rotary vibrating screen can not only screen the impurities of flour, but also sifting the flour, which fully meets the screening needs of customers. Under normal circumstances, the sieving accuracy of flour is required to be 400 meshes, which is very suitable for selecting a rotary vibrating sieve for sieving.

The rotary vibrating screen uses a vertical motor as the excitation source. When the screen machine is started, the eccentric weights installed at the upper and lower ends of the motor convert the rotating motion of the motor into a horizontal, vertical, and inclined three-dimensional motion. Then transfer this movement to the screen surface. In this process, the flour fines smaller than the sieve surface aperture fall to the lower layer through the sieve holes, and become the under-sieve. The flour particles or impurities larger than the sieve surface aperture are discharged from the discharge port after continuous jumping motion to complete the flour Sieving and removing impurities.

The rotary vibrating screen can screen particles as fine as 500 mesh or 0.028mm, and is equipped with a screen cleaning device, which can reduce the blocking of the material during the screening process and greatly improve the screening of the screen Yield and screening efficiency.

Summary: Among the above three types of vibrating screens, if the user requires high screening accuracy, the rotary vibrating screen should be selected first, but for simple impurity removal, you can choose straight-line screen and straight-line vibrating screen. The output of straight-line screen is similar to that of linear The output of vibrating screen is not divided into upper and lower, but because the price of linear vibrating screen is cheaper than that of direct row screen, users prefer to choose linear vibrating screen instead of straight row screen.