低湿地区玉米就仓通风干燥数值模拟研究  

Numerical Simulation Study of Maize in⁃bin Ventilation Drying in Low Humidity Area

作　　者：董晓倩 高帅 杨开敏[1] 褚凤娇 王远成[1] Dong Xiaoqian;Gao Shuai;Yang Kaimin;Chu Fengjiao;Wang Yuancheng(School of Thermal Engineering,Shandong Jianzhu University,250101;Tongyuan Design Group Co.,Ltd.,250101)

机构地区：[1]山东建筑大学热能工程学院,250101 [2]同圆设计集团股份有限公司,250101

出　　处：《粮食储藏》2024年第5期25-32,43,共9页Grain Storage

基　　金：国家重点研发计划(2024YFE0106800);山东省自然科学基金(ZR2021ME199);山东省高等学校“青创人才引育计划”。

摘　　要：研究低湿地区玉米就仓干燥过程中粮堆内部热湿迁移的规律,可以为优化干燥工艺及其实际应用提供理论支撑。以锥底干燥仓的玉米粮堆为研究对象,采用有限体积法,数值模拟了在逐日、逐时连续和逐时间歇气象条件下的自然空气通风干燥,以及在逐日和逐时连续气象条件下的辅助热源加热的低温空气通风干燥。深入研究了通风干燥过程中粮堆温度和含水率的变化规律,并对干燥成本进行了分析评价。结果表明,当干燥仓内干燥粮食平均含水率达到目标值15%时,自然空气通风干燥在逐日、逐时连续和逐时间歇条件下分别需时8.5 d、7.6 d和4.1 d,而低温空气通风干燥在逐日和逐时连续条件下分别需时6.5 d和4.6 d;此外,分析了逐时气象条件下间歇式干燥、连续式自然空气通风干燥以及连续式低温空气通风干燥的干燥成本,分别为0.009元/斤、0.017元/斤和0.022元/斤,相比于传统的高温热风干燥,分别减少了0.031元/斤、0.023元/斤和0.018元/斤。研究结果能够为玉米就仓干燥技术的实际应用提供理论支持和实践指导。The study of heat and moisture migration inside the grain pile during the drying process of maize in a low-humidity area can provide theoretical support for the optimization of the drying process and its practical appli⁃cation.This study focused on maize grain piles in a cone⁃bottom drying bin,employing the finite volume method to simulate natural air ventilation drying under daily,hourly continuous,and intermittent meteorological conditions,as well as low⁃temperature air ventilation drying with auxiliary heating under daily and hourly continuous meteoro⁃logical conditions.The study delved into the temperature and moisture content variations in the grain piles during ventilation drying and analyzed the drying costs.The results indicated that when the average moisture content of the dried grain in the drying bin reached the target value of 15%,the natural air ventilation drying daily,hourly contin⁃uous,and intermittent conditions required 8.5 d,7.6 d and 4.1 d,respectively,while the low⁃temperature air ventilation drying required 6.5 d and 4.6 d with daily and hourly continuous conditions.In addition,the drying costs of hourly meteorological conditions,such as intermittent drying,continuous natural air and low⁃temperature air ventilation drying were analyzed,revealing costs of 0.009 yuan/catty,0.017 yuan/catty and 0.022 yuan/catty respectively,which reduced 0.031 yuan/catty,0.023 yuan/catty and 0.018 yuan/catty,compared to traditional high⁃temperature hot⁃air drying,respectively.The results of the study can provide reliable theoretical support and practical guidance for the practical application of maize in⁃bin drying technology.

关 键 词：就仓干燥 自然空气干燥 数值模拟 玉米 干燥成本 

分 类 号：S375[农业科学—农产品加工]