What is the reason for frequent blockage of biomass pellet machine?
Many pellet plant operators will encounter the problem of frequent material blocking in the pellet machine during daily production. Once the material is blocked, production will be stopped directly, increasing maintenance costs. The blockage of biomass pellet machine is not caused by a single factor. Most of the faults come from the state of raw materials, feeding speed, wear of accessories and improper operation.
First, the moisture content of raw materials is the main factor. When the moisture content is higher than 20%, the material slips in the compression cavity and cannot be compressed, causing accumulation and blockage; when the moisture content is lower than 10%, the material lacks lubrication, the friction heat is too high, and the die holes are carbonized and blocked.
Second, the unstable feeding speed can easily overload and block the material. Feeding too fast will fill the pressure chamber instantly. Intermittent feeding will cause uneven extrusion and machine vibration.
Third, the extrusion force decreases after the pressure wheel skin and ring die are worn. The gap between the pressure wheel and the ring die is too large, and the material cannot be extruded smoothly and accumulates inside the machine.
Fourth, hard impurities such as stones and iron blocks enter the pressing chamber and directly lock the machine.
Practical solutions: Control the moisture content of raw materials at 12%-18%, maintain a constant feed speed, regularly calibrate the gap between the press wheel and ring die, install iron removal equipment, and replace worn parts in a timely manner.
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