The cleaning method of the lab spray dryer can be dry-cleaned, wet-washed, or chemical-washed to a certain extent according to actual conditions. During the dry-cleaning process, it can be effectively cleaned with a brush and a vacuum cleaner. Wet-washing: 60 ~ 80 ℃ hot water for cleaning.
In the process of chemical cleaning, an experimental spray dryer can use acid solution, alkaline solution, and various detergents to clean it during operation. Among them, acid pickling will effectively mix HNO3 into 1 during use. 1~ 2% concentration solution, wash with heating temperature not higher than 65 °C, and then wash with water; alkaline washing: mix NaOH into a 0.5 ~ 1% concentration solution, wash with heating temperature not higher than 65 °C, and then wash with clean water.
Airstream spray dryer should be effective according to its surrounding environmental conditions. Experimental spray dryer manufacturers depend on the level of dust in the air. Generally, once every 3 to 6 weeks with high content, the dust content is low. Clean once every 6 ~ 8 weeks. The stainless steel filaments should be evenly laid into the frame of the air filter after being washed by the alkaline washing method and sprayed with light spindle oil or a vacuum pump.
How to clean the spray nozzle? After we use the laboratory spray dryer, in order to ensure the next normal use, we need to clean and maintain its spray head. To complete the cleaning of the spray nozzle of the laboratory spray dryer, there are many ways according to the specific situation.
The wet cleaning actually refers to cleaning the nozzle of a laboratory spray dryer using hot water with a temperature in the range of 60 to 80 degrees Celsius. Alkaline washing refers to mixing sodium hydroxide (NaOH) into a 0.5-1% concentration solution, and then heating it to 60 to 80 degrees Celsius, washing it, and washing it with water after the washing is completed.
In addition, the so-called pickling mainly refers to heating nitric acid (HNO3) into a solution at a concentration of 1-2%. At this time, it should be noted that the heating temperature must not exceed sixty-five degrees Celsius. After that, the nozzle of the laboratory spray dryer was washed, and then rinsed with water. It should be noted that after the wet and chemical washing is completed, the various components of the equipment need to be installed and sterilized by high temperatures. The disinfection time is about 15-30 minutes.
During the cleaning process, in order to protect the spray nozzle should not be washed with chlorine and its compounds to avoid oxidation. In short, when cleaning the spray nozzle of the laboratory spray dryer, we not only need to pay attention to cleaning it but also to prevent it from being adversely affected.