Cleaning work of spray dryer
In order to ensure the cleaning of the spray dryer dryer tower and its pipelines and all parts in contact with the finished product, there can be very good products, and regular cleaning of the spray dryer equipment is very necessary. When the product type is changed, or the equipment has been discontinued for more than 24 hours without being cleaned, it should be thoroughly cleaned. The cleaning method can be dry cleaning, wet cleaning or chemical cleaning according to the actual situation.
Dry cleaning: clean with a brush or vacuum cleaner (applicable to small dryers).
Wet cleaning: use 60 ~ 80 ℃ hot water for cleaning.
Chemical washing: cleaning with alkaline liquid, acid liquid and various detergents. Among them, pickling: HNO3 is made into a solution with a concentration of 1-2%, the heating temperature is not more than 65 ℃ for washing, and then washed with water; alkaline washing: making NaOH into a solution with a concentration of 0.5-1%, the heating temperature is not more than 65 Wash at ℃, then wash with water.
After the wet cleaning and chemical cleaning, the spray dryer equipment and various components should be installed and subjected to high temperature digestion for 15 ~ 30min.