人造米热风干燥特性及干基含水率预测模型  

Hot air drying characteristics of artificial rice and prediction model of dry base moisture content

作　　者：张鹏飞 薛东晓 程春 张琦[1] 陈博 龚俊杰[1] ZHANG Pengfei;XUE Dongxiao;CHENG Chun;ZHANG Qi;CHEN Bo;GONG JunJie(School of Mechanical Engineering,Yangzhou University,Yangzhou 225127,China;Famsun Group Co.,Ltd.,Yangzhou 225012,China)

机构地区：[1]扬州大学机械工程学院,江苏扬州225127 [2]江苏丰尚智能科技有限公司,江苏扬州225012

出　　处：《包装与食品机械》2022年第3期33-38,共6页Packaging and Food Machinery

基　　金：江苏省科技项目现代农业项目基金(BE2018360)。

摘　　要：为研究人造米热风干燥特性,对人造米在热风不同干燥温度(60~80℃)、风速(1~2 m/s)以及料层厚度(2~6 cm)进行干燥试验。根据试验所得数据,计算出不同干燥条件下人造米的有效水分扩散系数,探究不同干燥温度、风速与料层厚度对人造米有效水分扩散系数的影响关系。进一步建立干燥动力学模型,并与试验数据拟合得出模型拟合程度。结果表明,人造米在热风干燥前期为升速干燥阶段,而后进入降速干燥阶段,无明显的匀速干燥阶段。与干燥温度与风速相比,料层厚度对人造米有效水分扩散系数影响最大。通过计算模型决定系数高于0.983,均方根误差小于0.007,模型拟合度较好。该模型能够准确预测人造米热风干燥过程中的含水率变化过程。In order to study the hot air drying characteristics of artificial rice,the drying experiments of artificial rice were carried out under different drying temperatures(60~80℃),air velocity(1~2 m/s)and material thickness(2~6 cm).According to the experimental data,the effective water diffusion coefficient of artificial rice was calculated under different drying conditions,and the effects of different drying temperature,air velocity and material thickness on the effective water diffusion coefficient of artificial rice were investigated.Further,the drying kinetics model was established,and the fitting degree of the model was obtained by fitting with the experimental data.The results show that the artificial rice in the early stage of hot air drying is in the stage of accelerated drying rate,and then enters the stage of decelerated drying rate.There is no obvious constant drying stage.Compared with the air velocity and drying temperature,the material thickness has the greatest influence on the effective water diffusion coefficient of artificial rice.The diffusion coefficient of the model determined through calculation is higher than 0.983,and the root mean square error is less than 0.007.The model has good fitting degree.The model can accurately predict the change process of water content in the hot air drying process of artificial rice.

关 键 词：人造米 热风干燥 模型 有效水分扩散系数 

分 类 号：TS205.1[轻工技术与工程—食品科学]