三七薄层干燥特性研究  

LAMINA DRYING INVESTIGATION OF NOTOGINSENG

作　　者：马煜[1] 李明[1] 魏生贤[1,2] 王云峰[1] 罗熙[1] 

机构地区：[1]云南师范大学太阳能研究所,昆明650092 [2]曲靖师范学院物理与电子工程学院,曲靖655011

出　　处：《太阳能学报》2012年第6期937-943,共7页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(50966004);高等学校博士学科点专项科研基金(20095303110001);云南省科技计划(2007C0016Z;2008CA024;2008GA014);教育部长江学者和创新团队发展计划

摘　　要：利用恒温干燥实验对两种不同厚度的三七切片在4种不同干燥温度下的干燥特性和有效成分含量的变化进行分析。结果显示:干燥初期,三七含水率下降较快;温度升高,干燥速率加快、干燥时间缩短;60±10℃范围内,干燥速率较快且变化不大;40～50℃范围内三七有效成分损失不大。基于节能与干燥效率的考虑,最佳干燥温度取50℃为宜。3种模型对实验数据的回归分析表明,Page模型的相关系数最大(R2>0.994)、标准差最小(SD<0.00058),可视为三七干燥过程的最佳模型。太阳能三七干燥实验与Page模型对比亦显示,两者吻合较好。Based on four different constant-temperatures drying experiments for two thickness of Notoginseng slices, the drying characteristics and effective content variation of Notoginseng had been analyzed. The results show that the water content of Notoginseng decreases sharply at the initial drying stages. When the operating temperature increases, drying velocity increases and drying period reduce. For 60 ± 10℃, drying velocity is large and drying velocity difference is small. At the range of 40-50℃, effective constituent variation of Notoginseng is small. The optimal drying temperature of 50℃ is suitable for Notoginseng based on energy saving and drying efficiency. Three models＇ regression analyses from experimental data show that the correlation coefficients of Page model are the largest （ R2 〉 0. 994）, the standard deviations of Page model are the smallest （ SD 〈 0. 00058 ） and it is regarded as optimal model for describing Notoginseng drying process. The experiment results of solar drying notoginseng and Page model predictions also indicate that both are highly consistent.

关 键 词：三七 实验研究 薄层干燥 数学模型 

分 类 号：S567.53[农业科学—中草药栽培]