Vibrating separator consists of three working containers, in which there are 5 separation screens with different size cells. Largest cell is on the top sieve of the top container, the lowest – in the lower sieve bottom of the container. In working containers can be set from 0 to 6 screens (2 screens in each container). So now separator can hold the maximum separation of the mixture into 9 fractions (three fractions in each container – two sieves accumulate on the third – on the bottom of the container). Containers connected by branch pipes which also established separation sieve. The mixture, which should be divided, loaded at the top of the container. Under the influence of unbalance 2, which are driven by asynchronous electric motors through belt clutch 3 working containers begin to vibrate making flat movement. Work the mixture is thrown and moved (by varying the amplitude of the left and right with different unbalance unbalanced masses) along the top of the container. The largest particles are fed to the upper and lower fall through to the lower sieve. It also remains a particle of a certain size, which does not pass through the cell corresponding sieve. The rest of the mingle falls to the bottom of the upper container and passed through a sieve connecting pipe, which also separates one faction gets on the top sieve of the second (middle of container), etc. The process of separating the middle and lower containers is the same as on the top. The resulting mingle is separated into 9 parts. After the separation process, the operator turns off the drive, open side vents for containers (each container of 3) and activates the drive of separated mixture under vibration of vibrating separator is discharged to the outside–each faction separately by size in separate tray. So this is the working principle of vibrating separator.
The common faults of separator screen and the solutions
Sieve blocked by Material
The screening rate of the vibratory separator is significantly reduced and the quality of the products is affected during the rainy season. In addition, the sieve have to be cleaned, and the self-cleaning function of the vibratory separator is not completely worked.
Analysis the reason: The self-cleaning function of the sieve was specially designed, but the product powder has adhered to the body of screen cover. And the powder shakes off the screen when the vibratory separator is stopped. At the same time, the clean ball stops jumping. The powder on the screen is easy to scale and block the mesh during the rainy season, so the screening area is reduced and the screening efficiency is reduced.
Solutions: Increasing an electric heating device. The heating air is blown into the inside of vibratory separator from the bottom of the fine powder urea slide. In other words, the electric dump truck tilts the plate towards the feeding of the vibratory separator, making the vibratory separator from a relatively closed space and filled with heating air, effectively preventing the moist outside air from entering into the vibratory separator and causing the sieve net to accumulate dirt and block the mesh hole. The Use of the electric heating device not only improves the screening efficiency, but also reduces the mesh cleaning time and reduces the labor intensity. At the same time, reducing the damage rate for the screen frame and the vibratory separator's tension device. Comparison of screening efficiency before and after using the electric heating device is shown in table 1.
Table1 Comparison of screening efficiency before and after using the electric heating device