Wet mixing high shear granulator is a device that mixes powdered materials with liquid binders through high shear force and makes them into granules. It is widely used in industries such as pharmaceuticals, food, and chemicals.
Mainly including mixing bucket, mixing slurry, cutting knife, pump, valve, pipeline and other parts. The mixing bucket is used to hold and mix materials, the mixing slurry is used to mix materials to form wet soft materials, the cutting knife is used to cut wet soft materials into particles, the pump and valve are used to control the flow of liquid, and the pipeline is used to connect various components.
working principle
Mixing stage: The powder material and adhesive are mixed in a specific container (usually a closed container combining cylindrical and conical bodies), and three-dimensional convection is formed by the high-speed rotation of the stirring blade (speed 20-600 rpm), so that the powder and adhesive are uniformly mixed into a moist soft material. For example, in the pharmaceutical industry, this stage can fully mix drug raw materials and excipients to provide a uniform substrate for subsequent granulation.
Granulation stage: Side mounted high-speed cutting knife (speed 1000-3000 rpm) cuts the soft material into small particles. By controlling the blade speed and stirring intensity, the particle size (0.1-5 mm) and density can be adjusted. For example, in the food industry, seasoning granules of different particle sizes can be prepared by adjusting parameters to meet taste requirements.
Discharge stage: Wet particles are automatically discharged through the discharge port under the centrifugal force of the stirring blade and enter the drying process. Modern models are equipped with intelligent viscosity sensors, which can adjust the adhesive spraying amount in real time (with an accuracy of ± 1.5%) to avoid excessive moisture or dry powder, ensuring the stability of the discharge.
Key component maintenance
Mixing and cutting system: Regularly check the wear and rotation direction of the mixing blade and cutting blade, and replace them in a timely manner if there are any abnormalities; Adjust the tension of the drive belt to avoid being too loose or too tight.
Sealing and discharge system: Check the airtightness of the machine cover and discharge port sealing ring, the flexibility of the discharge piston expansion and contraction, and ensure no leakage or jamming.
Regular in-depth maintenance
Half year maintenance: replace worn synchronous belts and adjust the tension mechanism of the drive belt; Add lubricating oil to the reducer to the center line of the dipstick, check the dust removal of the distribution box and the fastening of the wiring terminals.
Annual maintenance: Clean internal oil stains and powder after power outage, replace aging electrical components, check circuit connections and component clearances.