There are significant differences in the working principles between the conversion granulator and the roller extrusion granulator, which directly affect their respective work efficiency, product quality, and applicable raw material types:
The working principle of the conversion granulator:
The core component of the conversion granulator is a rotating disk, which is commonly referred to as the “conversion”.
The raw materials are evenly spread on the rotating converter through the feeding device.
As the conversion rotates, the raw materials begin to roll and collide under the action of gravity and centrifugal force, gradually forming wet particles.
These wet particles then fall onto the sieve below, and the pore size of the sieve determines the final particle size.
The raw materials that have not passed the sieve will return to the conversion process and continue to form new particles.
The size and humidity of particles can be precisely controlled by controlling the rotational speed of the stock transfer, the feeding rate and the water supply of the spray system.
The working principle of the roller extrusion granulator:
The counter roller extrusion granulator consists of a pair of rollers that rotate in opposite directions, which are commonly referred to as “counter rollers”.
The raw materials are evenly fed between the rollers through the feeding hopper.
The rotation of the roller generates strong squeezing force, which squeezes the raw material into strips or sheets.
As the raw materials continue to advance, these strip-shaped or sheet-like materials form particles under the pressure of the rollers.
The formed particles are then cut to the desired size by a cutting device.
The gap between the rollers can be adjusted to accommodate different sizes of raw materials and production requirements.
By controlling the speed, pressure, and feeding rate of the rollers, the hardness and density of the particles can be adjusted.
Differences in working principles:
The conversion granulator mainly relies on centrifugal force to form particles, while the roller extrusion granulator mainly relies on mechanical extrusion force.
The conversion granulator is suitable for processing wet or semi wet raw materials, while the roller extrusion granulator is more suitable for dry raw materials.
The roller extrusion granulator can produce harder and denser particles, while the particles produced by the conversion granulator are relatively softer and looser.
The production efficiency of the roller extrusion granulator is usually higher than that of the conversion granulator, but the energy consumption is also relatively high.
According to different production needs and raw material characteristics, a suitable granulator can be selected to achieve the best production effect.
