How to dry tea with industrial microwave equipment
Tea processing is the process of making various semi-finished tea or finished tea from fresh leaves of tea tree through various processing procedures. According to the different processing process, it can be divided into primary (primary processing), refined (fine processing), reprocessing and deep processing. Different types of tea are formed by different processing techniques. The quality of each type of tea depends on the coordination of processing procedures. High quality raw materials of fresh leaves can produce all kinds of high quality tea only under excellent processing conditions.
Microwaves are radio waves with frequencies ranging from 300 MHz to 300 GHz. The water molecules in the heated medium are polar molecules. Under the action of the fast changing high frequency electromagnetic field, its polar orientation will change with the change of the external electric field. At this time, the field energy of the microwave field is converted into the heat energy in the medium, so that the temperature of the material is raised, and a series of physical and chemical processes such as thermalization and expansion are generated to achieve the purpose of microwave heating and drying.
The purpose of drying is to evaporate water and tidy up the shape to give full play to the fragrance of the tea. Under low temperature(75-80℃), the equipment is trying and sterilizing, at the same time, it can remain more nutritional and self color, aroma, taste, shape and other characteristics, and it has an expanded effect. The microwave can interact with water molecules directly, and it ensures the quality and productivity of tea procedure. So the microwave equipment can work well in drying tea.