As a key piece of equipment for compressing mixed materials into granules, the double roller press granualtor's proper operation directly impacts granulation efficiency and pellet quality. The following key points should be noted during operation:
Pre-startup inspections are essential. Confirm that the gap between the two rollers meets production requirements. Check the bearing lubrication to ensure sufficient lubricant and no impurities. Clean the feed inlet and roller surfaces to prevent any hard objects from entering and damaging the rollers. Also, perform a 3-5 minute no-load test run to observe any abnormalities, such as unusual noises or sticking. Ensure that the motor is rotating correctly before feeding.
Parameter control during operation is crucial. Maintain a consistent feed rate to avoid overloading the equipment due to material accumulation. Stable feed can be achieved by adjusting the feed valve or installing a variable frequency drive. Adjust the extrusion pressure based on the material's moisture content. Excessively high moisture content can cause roller sticking, requiring increased pressure. Lower moisture content should reduce pressure to prevent pellet breakage. Pressure is generally controlled within the 5-15 MPa range. In addition, the roller surface temperature must be monitored in real time. If it exceeds 60°C, the machine should be shut down for inspection to prevent bearing overheating and damage.
Shutdown operations and daily maintenance must be standardized. Before shutting down, stop feeding and wait until the material on the roller surface is completely extruded before turning off the motor to prevent residual material from clumping. Regularly clean residual material from the roller surface with a soft brush or a special scraper. Hitting the roller surface with hard objects is strictly prohibited. Check the roller surface for wear weekly. Any defects such as dents or cracks should be repaired or replaced promptly to ensure uniform pellet formation.
Following these key points will not only extend the service life of the double-roller extrusion granulator, but also ensure the continuity of production and the stability of pellet quality on the organic fertilizer production line.
