中文摘要：

基于种子的物性特征和干燥系统客观能势的利用，设计了一种小型种子循环干燥机及引风干燥工艺系统，给出了消除干燥机热惯性的准则数烟气热风比，设计了比例阀，依照种子的含水率和干燥历程开发了自适应控制系统；为保证干燥机清种的可靠性，设计了可在360。范围内旋转的排粮翻板，不仅清种彻底，还能实现无级排粮。试验结果表明，在同样的干燥速率下，可使种子的干燥温度较传统的鼓风干燥低9℃，干燥效率提高20％，排粮结束后，干燥机内没有残留种子。

英文摘要：

A small scaled seed circulating dryer and an induced-draft drying process system were developed by analyzing physical properties of seeds and objective potential energy of drying systems. A kind of proportional valve was designed to eliminate thermal inertia of dryer thermal （ the ratio of exhaust gas to hot air） and an adaptive control system was developed base on the relationship between seed moisture and drying process by using the proportional valve. To ensure the reliability of the drying machine cleaning, a delivery flap, which could rotate 360°, was designed to clean up the dryer and realize step-less delivery. The result showed that the drying temperature was lower than the traditional drum wind dryers by 9℃, and the drying efficiency was increased at least by 20% , and no seeds were leave over after delivering.