The rotary drum granulator may encounter various malfunctions in the NPK fertilizer production line, which may affect production efficiency and product quality. Here are some common faults and their causes:
Uneven particles:
This may be caused by uneven mixing of raw materials, malfunction of the water spray system (such as nozzle blockage or unstable water pressure), or improper setting of the drum speed. Inconsistent particle size and shape can reduce the effectiveness and market value of fertilizer use.
Wall sticking phenomenon:
The material may adhere to the inner wall of the drum during the granulation process, leading to a decrease in granulation efficiency and even blockage. This is usually due to the high moisture content of the material or improper setting of the tilt angle of the drum.
Equipment wear and tear:
The inner wall of the drum, mixing device and other components will wear and tear due to material friction and corrosion during long-term operation, affecting the performance and service life of the granulator. Regular inspection and maintenance are necessary.
Transmission system malfunction:
Transmission components such as motors, reducers, chains, or belts may be damaged due to overload, poor lubrication, or aging, resulting in the inability of the drum to rotate normally and seriously affecting production.
Poor sealing:
If the sealing components of the rotary drum granulator age or are damaged, it can cause dust and moisture to enter, affecting equipment performance and even causing motor short circuits. Maintaining a good sealing condition is crucial for the normal operation of the equipment.
Control system malfunction:
Electronic devices and sensors used to control drum speed, water spray system, temperature, and humidity may malfunction, resulting in inaccurate parameter control during the production process, affecting particle quality and production efficiency.
Material blockage:
The inlet or outlet may be blocked by material clumping or oversized particles, resulting in poor material flow and affecting continuous production.
Vibration and noise:
Equipment imbalance, loose fasteners, or worn bearings can all cause abnormal vibrations and noise, which can accelerate equipment wear and affect the health of operators over long-term operation.
In order to reduce the occurrence of these faults, maintenance personnel need to conduct regular equipment inspections, including cleaning, lubrication, fastening, and replacement of worn parts, as well as calibration and maintenance of the control system. In addition, operators should receive appropriate training to understand the correct operation and troubleshooting methods of the equipment, in order to ensure the stable operation of the rotary drum granulator and the efficient production of the NPK fertilizer production line.