南疆地区霜后棉桃热风干燥试验及其数学模型研究..doc

南疆地区霜后棉桃热风干燥试验及其数学模型研究 王伟1,2 胡灿1,2 陈晓川1，3 弋晓康1 廖结安1 (1.塔里木大学机械电气化工程学院， 新疆 阿拉尔 843300；2.新疆维吾尔自治区普通高等学校现代农业工程重点实验室 摘要：针对南疆地区霜后棉桃、僵瓣棉的回收利用现状，采用热风干燥方式，对棉桃物料进行不同温度下的热风干燥试验，结果表明，棉桃的干燥过程主要降速干燥段，出现明显的恒速干燥段800C~1000C条件下的棉桃水分变化规律。 关键字：僵瓣棉；热风干燥；多孔介质；数学模型 中图分类号：TS113+.2;S-3 文献标识码：A The hot air drying experiment and mathematical model research of frost cotton bolls in the region of southern Xinjiang Wang Wei1,2 Hu Can1,2 Chen Xiaochuan1,3 Yi Xiaokang1 Liao Jiean1 (1 School of Mechanical and Electrical Engineering, Tarim University, Alar Xinjiang 843300; 2 The Key Laboratory of Colleges Universities under the Department of Education of Xinjiang Uygur Autonomous Region, Alar Xinjiang 843300; 3. The Mechanical Engineering College, Donghua University, Shanghai, 201620 China) Abstract: In view of the recycling and utilizing current situation of frosted bolls, deadlocked cotton in the southern Xinjiang region of China, the cotton bolls under different temperature of hot-air drying experiment was carried out, the results show that the drying process mainly for the falling rate drying process, but in the early dry preheating, the acceleration of the instantaneous drying period, does not appear obvious constant rate drying period, the drying rate concomitant the ascending rapid rise in the temperature of drying. Using the test data, and 7 kinds of porous medium drying mathematical model fitting found that page model high fitting precision, and model parameters is simple and suitable for the practical application of dry production; By solving the undetermined constants in the model, get the bolls of hot air drying mathematical model. It is can well predict that cotton bolls of moisture change rule under the condition of hot-air drying temperature from 800 C to 1000 C. Keywords: deadlocked cotton; hot-air drying; Porous Media; mathematical model 0 引言 在南疆地区棉花成熟季节，秋后棉花因自然气候、生长期等多种原因造成了棉桃的发期过晚，出现僵瓣棉等现象，影响了棉花的整体质量和采摘[1]。针对霜后棉桃、僵瓣棉的回收利用现状，将未成熟的棉桃采摘下来，通过热风干燥方式进行催熟干燥处理，能促进棉纤维的