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Bolting cloth plugging causes and solutions

The processing capacity of the vibrating bolting cloth machine is positively correlated with the effective opening ratio of the screen. The larger the effective opening ratio, the better the screening of the material and the greater the processing capacity of the screening machine. The open cell ratio refers to the inherent opening ratio of the screen, regardless of the application or material. The effective opening ratio refers to the ratio of the opening of the screen to the effective screening of the material during the screening process.

In practical applications, there are two factors that cause the effective opening ratio of the screen to be reduced (ie, the screen is clogged). One is the proximity effect, which refers to the blockage formed by the particles embedded in the mesh close to the mesh aperture; One is the stacking effect, which is mostly the clogging of the screen caused by the viscous materials or the accumulation of static electricity due to the mutual adsorption of static electricity. Therefore, in order to ensure the throughput, it is necessary to maintain the cleanliness of the screen mesh. This article describes the most common methods for preventing clogging.

The most commonly used screen self-cleaning device is the "slider". The slider ring is usually placed in the middle of the punching plate and the screen. When the vibrating screen is running, the slider ring will bounce and tap the screen. According to different material properties, the slider has 5 cleaning methods:

1. The slider taps the screen to cause the particles close to the mesh to leave the mesh, thereby allowing other particles to be screened;

2. The slider "scraps" the protruding parts or breaks the fragile particles;

3, the slider can speed up the soft material embedded in the mesh through the sieve;

4. Because the slider “scraping” on the lower part of the screen, some fibrous materials embedded in the mesh can be removed, thereby improving the processing amount;

5. The slider can separate the materials due to the electrostatic reunion and smoothly pass through the sieve.

6, but the slider is not suitable for the following materials: easy to agglomerate, easy to agglomerate; high temperature sensitivity; high hardness, irregular shape.

In addition, the slider group works like a single slider. The difference is that the size and mass of the slider group are larger, the impact force on the screen will be greater, and the effect of cleaning the screen will be better without reducing the life of the screen. The slider set is typically used for large size screens for easy maintenance.

The self-cleaning device can be mounted on the screen portion in addition to the lower portion of the screen. The necklace-type slider group on the screen allows the material to stay on the screen for a longer period of time, so the throughput is also greater. The mesh surface hub slider set not only increases the residence time of the material on the screen, but also shears. This shearing action can scrape the material with a higher oil content on the surface of the screen or break the brittle agglomeration, thereby improving the throughput and reducing material loss.

Sprinkler

The screen sprinkler is installed for solid-liquid separation, which prevents the net surface from becoming clogged and accelerates the removal of solid particles on the mesh surface.

The fixed spray device is used to flush the granular solids and helps to flush small particles from the large particles.

Rotary spray or moving spray is used to rinse fibrous or velvet materials.

Ultrasonic device

The ultrasonic vibrating screen converts the kinetic energy into high energy by using a high frequency electronic frequency to cause the screen to generate high frequency and low amplitude vibration. The ultrasonic device is used to screen the precise screening of materials close to the mesh, and to eliminate static electricity and prevent particle reunion. It can effectively prevent the clogging of small meshes, ensure the maximum opening ratio is always maintained during the work process, and can improve the activity of the material to smoothly pass through the mesh. This device is widely used in batteries, coatings, metal powders and pharmaceutical industries.

The slider is the most commonly used screen to prevent clogging, whether it is to screen dry or wet materials. Bouncing balls are used for coarse screen cleaning of dry materials. The sandwich screen is an all-in-one design that is easier to install and disassemble with low noise. Cleaning devices on the surface of the screen are not commonly used and are only used for certain special applications. The spray device is used for the screening of wet materials. The ultrasonic device screens fine materials very efficiently and is only used for screening dry materials.