The equipment makes use of the track sine wave generated by the circular motion of the diamond roller, and the disturbance principle of the sine wave, so that the material layer on the grate (screen) is disturbed loosely. The circular roller and diamond roller are organically combined to form a screen grate to screen the materials. The embedded scraper is installed under each roller, which can remove the entanglements and adhesions stuck to the disc, so as to keep the screen hole smooth. The screen body is composed of two or more stages of circular rollers with inclined angles and diamond shaped roller screen plates. The coal flow moves along the inclined screen body, so that the coal flow is evenly distributed on the screen plate, which is conducive to screening and avoids the occurrence of coal blockage, coal accumulation and hole blockage. Under the same screening area, the screening efficiency of the sine screen is 40%~50% higher than that of other screening equipment. It has the characteristics of large processing capacity, high screening rate and no vibration during operation. It can screen materials containing any moisture and viscosity without sticking, blocking, jamming and noise.

Composite sine screen is an ideal screening equipment for solid materials in coal, power, metallurgy, cement, mining and other departments, especially suitable for dry classification of coal in coal mines, coal washing plants and thermal power plants. It is especially suitable for particle size grading of 10mm or more.

Main technical features:

(1) It is applicable to particle size grading of 10mm or more.

(2) Large processing capacity per unit area, stable and reliable operation.

(3) Suitable for all kinds of screened materials. It can handle materials with high moisture and viscosity.

(4) High screening rate. The screening efficiency of coal mine and coal preparation plant can reach more than 85% when the grading particle size is 10mm; When the coal grading particle size is 30mm, the screening efficiency can reach more than 88%.

(5) The screen hole is not stuck or blocked, and the material passes through the screen continuously and smoothly.

(6) Good environmental performance. The whole machine adopts a fully enclosed structure, which can effectively avoid coal dust flying, without vibration and low noise.

(7) Simple structure, small volume, convenient installation and maintenance.

Innovation

1. Working principle.

2. The screen shaft is perpendicular to the feeding direction. The number of screen shafts  and the distance between them can be flexibly selected according to the processing capacity.

3. The rotation direction of the screen shaft is the same as the movement direction of the coal flow: on the one hand, it saves the power for the screen to rotate and reduces the power consumption of the motor; On the other hand, the adverse phenomena such as coal blockage, coal accumulation and dead coal are avoided, which is more conducive to screening. Under the same screening area, the screening efficiency is higher and the processing capacity is greater.

4. Strong adaptability of screen hole size: by accurately changing the shaft spacing and the size of diamond roller and round roller, the screen hole size can be strictly controlled between 10-30mm, and the screen hole size can be determined as required to adapt to different particle size grading. Flexible and adaptable to meet different needs of users.