摘要
为提高菠萝切片干燥效率,以热风温度、风速和切片厚度为影响因素,通过单因素试验和正交试验分析,探讨菠萝切片热风干燥最优工艺参数组合、干燥动力学模型、有效水分扩散系数和活化能。结果表明,菠萝切片的干燥速率与热风温度和风速呈正相关,与切片厚度呈负相关。影响菠萝切片干燥效率的主次因素依次为切片厚度>热风温度>风速,其中切片厚度对菠萝热风干燥效率的影响最显著,热风温度的影响次之,而风速影响不显著,各因素的贡献率分别为79.71%,14.39%,5.48%。菠萝热风干燥最优工艺组合是70℃,1.5 m/s,9 mm。在试验干燥条件下,获得菠萝有效水分扩散系数为1.217×10^(-9)~2.930×10^(-9)m^(2)/s,活化能值为20.89 k J/mol,Logarithmic是表征菠萝切片热风干燥特性最优的干燥动力学模型。研究结果为指导菠萝干燥装备和工艺设计提供参考依据。
In order to improve the drying efficiency of pineapple slices,the hot air drying experiment was conducted with hot air temperature,air velocity and slice thickness as experimental factors,and the optimal combination of hot air drying process parameters,drying kinetic model,effective moisture diffusion coefficient and activation energy of pineapple slices were discussed through single factor test and orthogonal test analysis.The results showed that the drying rate of pineapple slices was positively correlated with hot air temperature and air velocity,and negatively correlated with slice thickness.The primary and secondary factors that affect the drying efficiency of pineapple slices were slice thickness>hot air temperature>air velocity.Among them,slice thickness had the most significant effect on pineapple hot air drying efficiency,followed by hot air temperature,while air velocity had no significant effect.The contribution rates of each factor were 79.71%,14.39%and 5.48%respectively.The optimal process combination of pineapple slice hot air drying was 70℃,1.5 m/s,9 mm.Under the experimental drying conditions,the effective water diffusion coefficient of pineapple was 1.217×10^(-9)~2.930×10^(-9) m^(2)/s,the activation energy value was 20.89 kJ/mol,Logarithmic was the best drying kinetic model to characterize the hot air drying characteristics of pineapple slice.The research results provided a reference for guiding pineapple drying equipment and process design.
作者
马兴灶
卢洁
李萌静
杨凤娣
熊丹丽
MA Xingzao;LU Jie;LI Mengjing;YANG Fengdi;XIONG Danli(School of Mechatronic Engineering,Lingnan Normal University,Zhanjiang,Guangdong 524048,China)
出处
《农产品加工》
2023年第15期1-7,11,共8页
Farm Products Processing
基金
广东省粤西农业机械装备智能化及其关键技术研究创新团队项目(2020KCXTD039)
湛江市科技攻关计划项目(2021B01015)
湛江市科技发展专项资金竞争性分配项目(2022A01058)。
关键词
菠萝切片
热风干燥
动力学模型
有效水分扩散系数
活化能
pineapple slices
hot air drying
kinetic model
effective water diffusion coefficient
activation energy
