In order to ensure the cleaning of the drying tower body of the spray dryer and its pipes and all parts in contact with the finished product, and to obtain first-class products, regular cleaning equipment is very necessary. When the product variety is changed, or the small spray dryer has been out of production for more than 24 hours and has not been cleaned, a comprehensive and thorough cleaning should be performed.
The cleaning method can be dry cleaning, wet cleaning or chemical cleaning according to the actual situation.
Dry cleaning: Use a brush or a vacuum cleaner to clean (applicable to small dryers).
Wet cleaning: Wash with hot water at 60~80℃.
Chemical washing: wash with lye, acid and various detergents. Among them, pickling: make HNO3 into a solution with a concentration of 1~2%, and the heating temperature does not exceed 65 °C for washing, and then wash with water; alkali washing: make NaOH into a solution with a concentration of 0.5~1%, and the heating temperature does not exceed 65 ℃ for washing, then rinse with clean water.
After wet cleaning and chemical cleaning, the equipment and components should be installed and sterilized at high temperature for 15-30 minutes.
When cleaning, be careful not to wash with chlorine and its compounds.
The cleaning of the air filter should be determined according to the surrounding environmental conditions, that is, the level of dust content in the air. Generally, it is cleaned once every 3 to 6 weeks for high dust content, and once every 6 to 8 weeks for low dust content. Among them, the stainless steel filaments should be evenly laid in the frame of the air filter after being washed by the alkaline washing method, and sprayed with light spindle oil or vacuum pump
Post time: Jan-10-2022