| 基于Weibull分布函数的桔梗切片热风干燥特性 |
| |
| 引用本文： | 罗燕,李武强,万芳新,黄晓鹏.基于Weibull分布函数的桔梗切片热风干燥特性[J].中国农业科技导报,2020,22(8):132-140. |
| |
| 作者姓名： | 罗燕 李武强 万芳新 黄晓鹏 |
| |
| 作者单位： | 甘肃农业大学机电工程学院， 兰州 730070 |
| |
| 基金项目： | 甘肃省科技重大专项（2060404）；甘肃农业大学科技创新基金-学科建设基金项目（GSAU-XKJS-2018-187）。 |
| |
| 摘 要： | 为提高桔梗切片的干燥速率和品质，采用热风干燥技术对桔梗进行干燥处理，研究了干燥温度和切片厚度对桔梗切片热风干燥特性的影响，利用Weibull分布函数对干燥曲线进行拟合分析，并比较了不同干燥条件下干制品的水活度和色泽。结果表明：桔梗干燥主要为降速干燥，升高热风温度、减少切片厚度均能提升干燥速率；较适宜的热风参数为：温度55 ℃ ，切片厚度4 mm。Weibull分布函数决定系数R2的区间为0995 3～0.999 5，离差平方和2的区间为0.449 9×10-4～4.136 3×10-4，可以较好地拟合桔梗切片的热风干燥过程。尺度参数α与热风温度成反比；形状参数β主要受切片厚度影响；热风干燥技术可显著提高桔梗色差值，降低干制品的水活度。通过比较不同干燥条件下干制品微观结构的扫描电镜分析发现，热风处理可减少表细胞损伤、提高干燥速率。该研究结果可为热风干燥条件下桔梗的产业化生产提供参考。
|
| 关 键 词： | 桔梗切片 热风干燥 干燥特性 Weibull分布函数 |
| 收稿时间： | 2019-05-31 |
Drying Characteristics of Platycodon grandiflorum Slice by Hot-Wind Based on Weibull Distribution Function |
| |
| LUO Yan,LI Wuqiang,WAN Fangxin,HUANG Xiaopeng.Drying Characteristics of Platycodon grandiflorum Slice by Hot-Wind Based on Weibull Distribution Function[J].Journal of Agricultural Science and Technology,2020,22(8):132-140. |
| |
| Authors: | LUO Yan LI Wuqiang WAN Fangxin HUANG Xiaopeng |
| |
| Institution: | College of Mechanical and Electronical Engineering, Gansu Agricultural University, Lanzhou 730070, China |
| |
| Abstract: | In order to improve the drying rate and quality of Platycodon grandiflorum slices, by using hot-air drying technology, the effects of drying temperature and slice thickness on the drying characteristics of Platycodon grandiflorum slices were studied, and the Weibull distribution function was used to fit the drying curve and calculate the effective water diffusion coefficient, evaluated the quality of dried products by comparing the water activity and color under different drying conditions. The results showed that: the drying was mainly at lower speed, and increased the hot-air temperature and decreased the slice thickness to improve the drying rate. The suitable parameters of hot-air drying were drying temperature 55 ℃ and slice thickness 4 mm. The Weibull distribution function was used to simulate the drying data, and the determination coefficient R2 was 0.995 3~0.999 5, and the sum of squares of deviations 2 was 0.449 9×10-4~4.136 3×10-4, which could fit the hot-air drying process of platycodon slices well. Scale parameter α was inversely proportional to hot air temperature. The shape parameter β was mainly affected by slice thickness. Hot-air drying technology could significantly increase the chromatic aberration of platycodon grandiflorum and reduce the water activity of dry products. By comparing the microstructure of dry products under different drying conditions, it was found that the hot air treatment could reduce the surface cell damage and increase the drying rate. The results provided reference for the industrial production of platycodon grandiflorum under hot-air drying condition. |
| |
| Keywords: | Platycodon grandiflorum slice hot air drying drying characteristics Weibull distribution function |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《中国农业科技导报》浏览原始摘要信息 |
| 点击此处可从《中国农业科技导报》下载免费的PDF全文 |
