摘要
采用单因素实验研究热风温度、风速和切片厚度对胭脂萝卜干燥特性的影响,探讨了干燥过程中水分随时间的变化规律,建立胭脂萝卜热风薄层干燥的动力学模型;并在以上单因素实验的基础上,采用正交实验优化提取红色素的干燥工艺参数。结果表明:胭脂萝卜薄层干燥速率的影响因素由大到小是切片厚度>温度>风速;胭脂萝卜热风薄层干燥的动力学模型满足Page方程;提取红色素的最优参数为热风温度60℃、加热风速0.8 m/s、切片厚度6 mm,此时红色素提取量高达3.12%。
This paper used single factor experiment to study the influence of drying characteristics on drying temperature and wind speed and slices thickness. Dynamic law of moisture with time was analyzed and hot air thin- layer drying dynamics model was established. On the basis of single factor experiments, the drying operation conditions of red pigment extraction were optimized by orthogonal experiment. The results showed that the effects for thin-layer drying rate of carmine radish from high to low was slice thickness 〉temperature〉wind speed. Hot air thin-layer drying of carmine radish was analyzed to meet the Page equation dynamic model with the comparison of three kinds of mathematical models. The optimal red pigment extraction rate was as much as 3.12% with drying temperature of 60 ℃ and wind speed of 0.8 m/s and slice thickness of 6 mm.
出处
《食品工业科技》
CAS
CSCD
北大核心
2016年第2期265-269,共5页
Science and Technology of Food Industry
基金
重庆市科技攻关项目(CSCT
2012gg-yy js80021)
中央高校基金科研业务费项目(XDJK 2010 C048)
关键词
胭脂萝卜
薄层干燥
动力学模型
红色素
carmine radish
thin-layer drying
dynamic model
red pigment
作者简介
汪照（1987-），女，硕士研究生，工程师，研究方向：特色农产品干燥，E-mail：wangzha03748@sina．com。
通讯作者：吴达科（1975-），男，博士，副教授，研究方向：农业环境控制，E—mail：keda5@swu．edu．cn。
