种子循环干燥系统设计与试验  

Development of Seed Circulation Drying System

作　　者：李长友[1] 麦智炜[1] 方壮东[1] 李健民[1] 张烨[1] 

机构地区：[1]华南农业大学南方农业机械与装备关键技术省部共建教育部重点实验室,广州510642

出　　处：《农业机械学报》2014年第6期242-248,共7页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(31371871);高等学校博士学科点专项科研基金资助项目(20114404110021);广东省产学研资助项目(2012B091000135)

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。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.

关 键 词：种子 干燥系统 干燥机 干燥工艺 

分 类 号：S226.6[农业科学—农业机械化工程]