摘要
采用远红外辐射干燥技术对半干红枣进行了泥制枣片加工,通过单因素实验研究了枣片在不同的辐射温度(55、60、65、70和75℃)、片厚(2、4和6 mm)和辐射距离(80、110和140 mm)下的干燥特性、水分有效扩散系数、干燥活化能和VC含量变化,并分析了不同干燥因素对干燥时间和V_C含量的影响,结果表明:辐射温度、片厚和辐射距离对枣片的红外干燥时间以及VC含量影响均显著(p值均<0.05)。在实验条件内,不同因素对干燥时间的影响显著性顺序为:辐射距离(p=0.001)>片厚(p=0.002)>温度(p=0.003),不同因素对V_C含量的影响显著性顺序为:温度(p<0.001)>辐射距离(p=0.001)>片厚(p=0.032);枣片整个干燥过程属于降速干燥,水分有效扩散系数在1.10674~9.67179×10^(-10)m^2/s的范围内,干燥所需的干燥活化能为53.79 k J/mol。辐射温度对枣片的VC含量影响最显著。当辐射温度65℃,辐射距离110 mm,片厚4 mm时,干燥速率快且V_C含量保持较高。
The far-infrared drying technical was used to red jujube mud on half-drying red jujube at this article.The water effective diffusion coefficient of the red jujube,dry activation energy and the changes of VCcontent was studied through the single factor experiment in different radiation temperature（55,60,65,70 and 75 ℃）,slice thickness（2,4 and 6 mm） and radiation distance（80,110 and 140 mm） of the drying characteristics. The results showed that it had much significant impact of jujube infrared drying time and V_C content under the different radiation temperature（p0.05）,slice thickness and radiation distance. Under the test conditions,the influence of different factors on the drying time significant order：The radiation distance（p=0.001）the piece of thick（ p = 0. 002） the temperature（ p = 0. 003）, and the influence of different factors on the V_C content in significant order：the temperature（p0.001）the radiation distance（p=0.001）the piece of thick（p=0.032）. The whole drying process of jujube sheet belonged to slow down drying. The water effective diffusion coefficient was 1.10674 ×10-10~9.67179 ×10^（-10）m^2/s and the required drying activation energy was 53.79 k J/mol.Radiation temperature was the most important influence on jujube piece of V_C. It had fast drying speed and could keep the high content of V_C when the radiation temperature was 65 ℃,radiation distance was 110 mm,slice thickness was 4 mm.
出处
《食品工业科技》
CAS
CSCD
北大核心
2016年第8期110-115,共6页
Science and Technology of Food Industry
基金
新疆生产建设兵团科技支疆计划项目(2013AB019)
关键词
远红外
枣片
干燥活化能
V_C
far infrared
jujube sheet
dry activation energy
V_C
