The adopt of fluid - bed drying ,which can dry cereal in time, contribute cereal to meet the safety condition of moisture for storage, so we can harvest cereal ahead of time on condition of the guarantee of quality of cereal and the reduction of loss for cereal's premature drying. This thesis elaborate a kind of small - sized fluid - bed desiccator , which was planned for the drying of cereal in most rural area, especially in rural area of the southern part of China; meanwhile drying process , operation principal and chief structure of this de...