The maintenance of organic solvent spray dryer should be combined with equipment characteristics and safety requirements. The following is a systematic maintenance plan:
1、 Daily maintenance (after each experiment)
1. Spray system cleaning
Immediately rinse the feeding pipeline, nozzle, and atomizer with the corresponding solvent. Viscous materials should be soaked in hot solvent and cleaned to avoid blockage.
When disassembling the nozzle, use specialized tools, clean and store it dry to prevent damage to the atomizing components.
2. Drying chamber and separator processing
After cooling to room temperature, clean the drying chamber and residual powder in the cyclone separator. Wipe stubborn stains with a soft solvent cloth to avoid scratching the inner wall.
Check the condition of the sealing ring and clean the adhesive material to prevent air leakage.
3. Solvent recovery system inspection
Drain the solvent from the condensation recovery device, clean the recovery bottle, and check for blockages in the pipeline.
Monitor the condensation effect and promptly address any abnormal frosting.
2、 Regular maintenance (weekly/monthly)
1. Mechanical component maintenance
Lubricate the atomizer and fan bearings, and replace the aging peristaltic pump hose (when elasticity decreases or cracks).
Adjust the tightness of the drive belt to avoid slipping or excessive wear.
2. Electrical and Control Systems
Check the safety of the power cord and plug, clean the control panel to prevent liquid infiltration.
Calibrate temperature/pressure sensors to ensure accurate parameter detection.
3. Safety device verification
Test the oxygen concentration sensor (accuracy ± 0.1%) and nitrogen flow controller to ensure that the oxygen concentration is ≤ 3%.
Verify the action threshold of the explosion-proof pressure relief valve (0.02 MPa) and the multi-level alarm mechanism (O ₂>3% shutdown).
3、 Special precautions
1. Inert gas system: Regularly check the purity of nitrogen (≥ 99.995%) and the tightness of the circulation pipeline to prevent air infiltration.
2. Material anti-corrosion: Stainless steel parts (such as 316L) should avoid long-term contact with highly corrosive solvents, and glass parts should be handled with care.
4、 Intelligent maintenance trend
1. Adopting a 15.6-inch explosion-proof touch screen storage process formula, it supports remote parameter adjustment and fault diagnosis, reducing the frequency of manual intervention.
2. The dual nitrogen supply system (main and backup switching time<1 second) and dual pressure monitoring enhance safety.
Strictly follow the equipment manual during maintenance, and it is recommended to contact professional after-sales service when dealing with high-precision components (such as atomizing discs) or explosion-proof systems.