Common Malfunctions and Solutions for Triple Drum Dryers
1. Excessive Noise
- Uneven distribution of materials inside the drum.
- Unstable installation of the dryer.
- Lack of lubrication or damage to the bearings.
- Loose fixing bolts on the bearing housing.
- Stop the machine and redistribute the materials evenly.
- Reinstall the dryer to ensure it is level and stable.
- Retighten the fixing bolts on the bearing housing.
- Replace the bearings of the triple drum dryer.
2. Abnormal Noise from the Large and Small Gears During Operation
Solutions:
Inspect the meshing clearance of the large and small gears; adjusting it to the proper specification will restore normal operation. If the small gear is severely worn, it should be replaced immediately.
Ensure the gear cover is tightly sealed to prevent dust ingress. Sufficient and reliable lubrication is crucial for extending gear life; thick gear oil or black oil should be used in the large gear cover.
3. Excessive and Repeated Stress on Both Shifting Rollers
Causes:
This issue is typically caused by poor contact between the supporting rollers and the riding rings. If the supporting rollers in the same set are not parallel, or if the line connecting the two rollers is not perpendicular to the drum axis, it will cause excessive stress on the shifting rollers and abnormal wear on the supporting rollers.
Solutions:
This phenomenon is often due to low installation accuracy or loose bolts, which cause the supporting rollers to deviate from their correct positions during operation. The problem can be resolved by realigning the supporting rollers to their proper positions.
4. Excessively Low Moisture Content in the Discharged Material
Solutions:
Reduce the fuel supply or increase the feed rate.
Note: Adjustments should be made gradually. Large, sudden adjustments will cause fluctuations in the moisture content of the discharge, resulting in failure to meet product quality requirements.
5. Material Not Drying Completely in a Single Pass
- The dryer is undersized for the application.
- Miscalculated air pressure or volume in the wind network.
- Improper operation of the dryer.
- Increasing the drying temperature is an option but carries a high risk of causing fires inside the dryer. The best approach is to replace or modify the drying equipment.
- Request the manufacturer to recalculate the air pressure and volume, and provide a design modification plan based on actual conditions.
- Consult the dryer manufacturer to obtain the equipment manual and learn the correct operating procedures.