Food Processing: They are used to dry and dehydrate a variety of food products, including fruits, vegetables, herbs, spices, and even ingredients like mealworm larvae for animal feed. 

Pharmaceuticals: These machines are crucial in the pharmaceutical industry for drying active pharmaceutical ingredients (APIs), granules, and other pharmaceutical products, helping to reduce waste and boost productivity. 

Chemicals: Tray dryers are employed in the chemical industry for drying various chemical compounds and materials. 

Other Industries: They can also be used for drying materials in other sectors, such as textiles (e.g., crude drugs, Chinese medicines, electric elements).

The machines achieve drying by circulating hot air through trays loaded with the wet material, ensuring even heat distribution and efficient moisture removal.