As a mature granulation equipment, the principle behind the disc granulator contains the mechanism of efficient granulation, which is worth exploring in depth.
The core of a disc granulator is to utilize the rotational motion of the disc, combined with the physical properties of the material itself and the externally added binder, to achieve the formation and growth of particles.
After the device is started, the disc begins to rotate under the drive of the motor. Powdered materials enter from the feeding port and are evenly distributed on the rotating disk. Due to the inclined installation and rotation of the disc, the material begins to form a cyclic motion on the disc under the action of centrifugal force and frictional force. Centrifugal force causes the material to spread towards the edge of the disc, while frictional force pushes the material upwards along the inner wall of the disc. After reaching a certain height, the material falls back to the bottom under the action of gravity, and this cycle repeats.
During the cyclic movement of materials, the spraying system begins to take effect. The adhesive is evenly sprayed onto the material through the nozzle. Adhesives usually have good viscosity and wetting properties, which can quickly wrap around powdered material particles, reduce the surface energy between particles, and make it easier for particles to attract and aggregate with each other. Once the particles begin to aggregate, they continuously roll and collide under the continuous rotation of the disk.
This rolling and collision is crucial for the growth of particles. In each collision, particles will adsorb surrounding powdery materials, gradually increasing their own volume. At the same time, the rotation of the disc also ensures that the particles can uniformly contact the new material in all directions, thereby ensuring that the shape and size of the particles are relatively uniform.
In order to achieve efficient granulation, the design of the disc granulator considers multiple adjustable factors. The rotational speed of the disc is a key parameter. Appropriate rotational speed can ensure sufficient movement and collision time of materials on the disc, promoting particle growth. If the speed is too fast and the material stays on the disc for too short a time, the particles may not be able to grow sufficiently; If the speed is too slow, it will affect production efficiency.
In addition, the inclination angle of the disc can also affect the granulation effect. A reasonable tilt angle can control the movement path and residence time of materials on the disc, enabling them to fully participate in the granulation process. At the same time, the spraying amount and concentration of the adhesive also need to be precisely adjusted according to the properties of the material and production requirements to ensure that the particles can be smoothly formed and meet the required quality standards.
The disc granulator achieves efficient and stable granulation process through clever principle design and adjustable parameter settings, providing strong support for production in many industries.
