中文摘要：

为了获得高湿稻谷逆流干燥层内的水分分布，实现干燥过程动态跟踪和调控，基于干燥水分扩散模型和深层干燥质量平衡方程，在线解析稻谷逆流干燥水分变化，给出了稻谷多段逆流干燥、缓苏复杂工艺条件下，层内含水率分布及干燥速率解析式，验证了风量谷物比为4，温度50℃的热风流过0.5m厚的逆流层后，仍具有较强的干燥能力，解析结果与实测的干燥机出粮口水分偏差在±0.5%范围内，证实了解析模型的可靠性。

英文摘要：

In order to analyze the moisture distribution of rough rice with high moisture content within counter flow drying layer and achieve the dynamic tracking of drying process and its control, based on the moisture diffusion model of drying process and the mass conservation equation of deep bed drying process, grain moisture variation in counter flow drying process was analyzed, and the moisture distribution in grain layer and the analytic expression of drying rate were deduced. Experiments indicate that 50℃ hot air still has drying capacity after penetrating a 0.5m thick refluxed zone when the ratio of air flux to grain mass is 4. The deviation of grain moisture from discharge hopper between mathematical explanations and experimental results was within ±0.5%, and it confirmed the reliability of the analytical model.