稻谷就仓干燥水分迁移规律及干燥动力学模型研究  

Regularity of Moisture Transfer and Drying Kinetics Model of Rice Silo

作　　者：宋玉[1] 刘超[1] 段依梦 曹磊[1] 朱昌保 周健 洪莹 陶澍[1] 陈继圣 王懿[2] 曹胜男 顾广东 Song Yu;Liu Chao;Duan Yimeng;Cao Lei;Zhu Changbao;Zhou Jian;Hong Ying;Tao Shu;Chen Jisheng;Wang Yi;Cao Shengnan;Gu Guangdong(Agricultural Products Processing Institute,Anhui Academy of Agricultural Sciences,Hefei 230031;Anhui Grain and Oil Science Research Institue,Hefei 230001;Hefei Honen Electromechanical Technology Co.,Ltd.,Hefei 230001)

机构地区：[1]安徽省农业科学院农产品加工研究所,合肥230031 [2]安徽省粮油科学研究所,合肥230001 [3]合肥弘恩机电科技有限公司,合肥230001

出　　处：《中国粮油学报》2021年第10期115-123,共9页Journal of the Chinese Cereals and Oils Association

基　　金：安徽省科技重大专项(18030701148);安徽省农业科学院谷物加工创新团队(2020YL077)。

摘　　要：将收获的高水分稻谷分别放置于自制的就仓干燥模拟仓内,研究通风量分别为80、92、104 m 3/h条件下处于仓内底部、中部、表层的稻谷水分迁移规律。应用8种常用干燥模型对实验数据进行非线性回归拟合分析,确定最适干燥模型,并对模型进行了验证。结果表明,稻谷各层水分比随着通风干燥时间的延长而呈下降趋势,其中最底层稻谷水分比最小,底层稻谷在前期(2 d内)水分迅速下降,后期下降速度逐渐平缓,而上层稻谷水分比依次增大,降水速率较下层相对较慢;稻谷有效水分扩散系数在0.092~0.43×10^(-3) m^(2)/d,其中80 m 3/h通风条件下,粮堆各层水分有效扩散系数均小于其他2种通风条件;而相同通风条件下,稻谷粮层距粮面60~90 cm范围内,扩散系数相对其他层较大。通过对比模型得到的预测值与实测值,确定Wang et al.模型为通风条件下稻谷各粮层水分扩散系数的预测模型。In this study,the harvested high moisture rice was placed in a self-made warehouse drying simulation bin to study the regularity of rice moisture transfer at different levels in the bottom,middle and surface layers of the warehouse under different ventilation rates of 80,92 and 104 m 3/h,respectively.Eight common drying models were used to carry out nonlinear regression analysis on the experimental data to determine the optimal drying model and verify the model.The results showed that the moisture ratio of different layers of rice decreased with the extension of ventilation drying time,among which the moisture ratio of the bottom rice was the smallest.The moisture content of the bottom rice decreased rapidly in the early stage(2 d),and gradually slowed down in the later stage,the moisture ratio of rice in the upper layer increased in turn,and the precipitation rate was relatively slower than that in the lower layer;The effective moisture diffusion coefficient of rice was 0.092~0.43×10^(-3) m^(2)/d,in which 80 m^(3)/h ventilation condition,the effective moisture diffusion coefficient of each layer of grain pile was smaller than the other two ventilation conditions;under the same ventilation condition,the diffusion coefficient of rice layer was larger than other layers in the range of 60~90 cm from grain surface.By comparing the predicted value with the measured value,the Wang et al.Model was confirmed to be the prediction model of moisture diffusion coefficient of rice layers under ventilation condition.

关 键 词：就仓干燥 水分迁移 通风量 干燥动力学模型 

分 类 号：TS210.[轻工技术与工程—粮食、油脂及植物蛋白工程]