Factors affecting the pelleting of disc pan granulator
2020/01/28
As a kind of fertilizer granulator machine used for a long time in fertilizer factory, disc pan granulator has its unique advantages. In the production of fertilizer granulation, there are the following factors for the uniformity of particles.
Structure of disc pan granulator
The disc granulator adopts the overall arc structure to effectively improve the granulation rate. Combined with the non power scraper equipment, it can reduce the agglomeration of materials in the granulation process and maximize the use of raw materials. In order to facilitate the fluidity and flexibility of on-site use, the base is firmly thickened and weighted, and no additional anchor screw is required to fix it, which also plays a role in preventing the deformation of the chassis. Disc granulator is very suitable for on-site operation, reducing tedious installation and layout procedures, saving time and improving work efficiency.
In the granulation stage of NPK fertilizer production line, with the continuous addition of raw materials, the manufactured particles fall into the lower belt conveyor through the plate edge under the effect of centrifugal force.
When the disc granulator processes raw materials, several parameters affect each other. For example, the smaller the diameter of the pelletizing disk is, the lower the disk height of the disk is, the larger the inclination of the disk is, and the higher the rotating speed can be; if the disk height is increased, the higher the inclination and the rotating speed can be. The smaller the inclination of the disc, the lower the rotation speed.
As NPK compound fertilizer production equipment, another factor affecting the disc granulator is the tilt angle of the disc. The tilt angle should not be less than 35° when pelleting, otherwise the material will stick to the disc and rotate with the disc body. With the increase of inclination angle and rotation speed, the material can be avoided from accumulating in the lower part, without falling and rolling up and down. However, the larger the inclination angle, the faster the downward rolling speed and the smaller the overflow particles. The most suitable obliquity of the disk is related to the diameter of the disk, that is, the obliquity of the disk decreases with the increase of the diameter of the disk. This is because the end velocity of particles moving along the disk surface increases with the increase of the diameter of the disk. In order to avoid the impact and fracture of other particles when the particles are driven down, the obliquity of the disk must be reduced.
