Is the air path clear
Once the resistance of the inlet, ducting or dust collector rises, air volume drops and drying performance suffers directly. Clearing accumulated material and dust regularly is the most easily overlooked and most effective maintenance step.
Seals and wearing parts
Seals at duct joints, inspection doors and rotating parts age and leak air over time. Leakage wastes heat and worsens the working environment. Parts known to wear should be replaced on a schedule.
Bearings and drive
Support rollers and bearings on rotary equipment need scheduled lubrication; watch for unusual noise and abnormal temperature rise. Problems in the drive are far cheaper to fix when caught early.
Calibrating temperature instruments
A temperature reading that has drifted makes operators adjust the heat source against the wrong data. Calibrating the sensors periodically is advisable, particularly on equipment that runs hot for long periods.
Checks during shutdown
Before a long shutdown, empty the machine so that residual material does not absorb moisture and cake, which can jam the equipment at restart.
References and Standards
- JB/T 10278—2015 Flash dryers[S]. Beijing: China Machine Press, 2015. (in Chinese)
- JB/T 3266—2015 Rotary drum dryer[S]. Beijing: China Machine Press, 2015. (in Chinese)
- Liu G W. Design Handbook of Drying Equipment[M]. Beijing: China Machine Press, 2009. (in Chinese)
- Mujumdar A S. Handbook of Industrial Drying[M]. 4th ed. Boca Raton: CRC Press, 2014.
- Liu X D, Li Z Y. Modern Drying Technology[M]. 3rd ed. Beijing: Chemical Industry Press, 2022. (in Chinese)