摘要
采用电阻法测量了红枣的共晶点、共熔点温度,其值为-32℃和-28℃。进行了单因素和正交实验,分别研究了冻结速度、枣片厚度、真空压力、冷阱温度、加热方式及加热板温度对升华时间和能耗的影响,确定了升华工艺最优参数:冷阱温度-40～-45℃、冻结速度1.0℃/min、辐射、导热混合加热方式、加热板温度40℃、枣片厚度8mm、真空压力35Pa。
A set of experiments designed by the single factor test and the orthogonal test was carried out on a lab scale dryer in this paper, and the eutectic and co-malting temperature of Jujube Dates measured by the electric resistance was -32 ℃ and -28 ℃. The analysis of the experimental results show that the optimum technical conditions of the sublimation-drying as follow： freeze temperature is -40～-45 ℃, the freezing velocity is -1.0 ℃/min, heating temperature of shell is 40 ℃, the sample layer thickness is 8 mm, and the hothouse pressure is 35 Pa.
出处
《当代化工》
CAS
2009年第4期335-339,共5页
Contemporary Chemical Industry
基金
榆林市科技攻关项目(0599-08)
关键词
红枣
冷冻干燥
共晶点温度
Oil product
Storage and transportation
Safty
Measurement
