Microwave Technology And Equipment Of Green Food Drying

This paper based on study the microwave drying craft of the green food (ginger Pu'er tea) in Yunnan province. Made comprehensive exposition for the microwave drying the green food, Particularly presented the new dry method for the ginger and Pu'er tea, and finished the good craft of the ginger and Pu'er tea.Firstly, this paper based on the dehydration process of food and the heat transfer theory of microwave drying. Builded a dry dynamics model which is suitable for the microwave drying slices food, and found the three stages of pollution-free food: a pre-heating period, a constant heating period, and a quick-down heating period. This is the valuable reference materials for research the craft and equipment. Secondly this paper exampled some representative test of microwave dried ginger, and analysed this test useing the temperature variations curves , drying characteristic curves, dry dynamics model's conclusion and the microwave dry character of food. Finally through analysed microwave dry character and light-waves dry character presenting the microwave and light-wave drying method. Thirdly this paper analysed the character of ginger and potato which dried with microwave and light-wave drying method. Conclused the dehydration characteristic and found the results of impact of drying effect. Finished the good craft of dried yellow ginger in one microwave oven. Fourth this paper also made the one microwave oven test for Pu'er tea and used the dry production line of microwave to dry the Pu'er tea. Through those test we found the the best craft of drying Pu'er tea. Fifth this paper confirmed the innovative and feasibility of used microwave and dispersing magnetron of the low power microwave dry production line.Because the particularity and complexity, there must be some problems in thethesis. This require researchers constantly and profoundly study. Hope that the theory and working results could play some role in promoting the entire course of the study. At last we make some advocate for further works.