摘要
为探讨远红外干燥技术对桔梗切片的干燥效果,获得品质较好的桔梗干制品。研究不同温度、切片厚度和辐照高度条件下桔梗的远红外干燥特性,通过建立其干燥动力学模型,对比不同干燥条件下桔梗干燥品质的变化。结果表明:干燥温度的适宜范围为55℃~60℃,切片厚度为4 mm物料的干燥效果较好;weibull分布函数能够较好地描述桔梗的远红外干燥过程;不同干燥条件下物料有效水分扩散系数的区间为1.08×10^(-9)~6.88×10^(-9) m^(2)/s;与热风干燥相比,远红外干燥技术所得干制品的色差值更小,干燥曲线的变化更平缓;对比不同干燥技术所得桔梗干制品的微观结构发现,远红外干燥所得干制品的细胞表面平整,孔隙均匀,细胞损伤较小。
In order to explore the drying effect of far-infrared drying technology on Platycodon grandiflorum slices,obtain better-quality dried Platycodon grandiflorum products.The far-infrared drying characteristics of Platycodon grandiflorum under different temperature slice thickness and irradiation height were studied,and the drying kinetic model was established to compare the changes of Platycodon grandiflorum drying quality under different drying conditions.The results show that the suitable range of drying temperature is 55℃~60℃,and the material with a slice thickness of 4 mm has a better drying effect;the weibull distribution function can better describe the far-infrared drying process of Platycodon grandiflorum;effective moisture diffusion of materials under different drying conditions The coefficient range is 1.08×10^(-9)~6.88×10^(-9) m^(2)/s;compared with hot air drying,the color difference of the dried product obtained by the far-infrared drying technology is smaller,and the change of the drying curve is more gentle;compare different drying technologies The microstructure of the obtained dried Platycodon grandiflorum product found that the cell surface of the dried product obtained by far-infrared drying is flat,the pores are uniform,and the cell damage is small.
作者
姜春慧
张倩
杨娜
李武强
马嘉伟
黄晓鹏
Jiang Chunhui;Zhang Qian;Yang Na;Li Wuqiang;Ma Jiawei;Huang Xiaopeng(College of Mechanical and Electrical Engineering,Gansu Agricultural University,Lanzhou,730070,China)
出处
《中国农机化学报》
北大核心
2021年第2期92-100,共9页
Journal of Chinese Agricultural Mechanization
基金
国家自然科学基金项目(51765003)
甘肃农业大学科技创新基金—学科建设基金项目(GSAU—XKJS—2018—187)
甘肃农业大学学生科研训练计划(20180646)。
关键词
桔梗切片
远红外干燥
干燥特性
动力学模型
Platycodon grandiflorum slices
far infrared drying
drying characteristics
kinetic model
