It is suitable for the production of micro-granular powder in universities, research institutes and laboratories of food, medicine and chemical enterprises. It has a wide range of applicability to all solutions such as emulsions and suspensions. It is suitable for drying of heat-sensitive substances such as biological products, biological pesticides, enzymes. preparations, etc. Because the sprayed materials are only subjected to high temperature and instantaneous heat when sprayed into a mist, these active materials maintain their active ingredients unchanged after drying.