赤芍浸膏微波真空低温干燥特性及动力学模型研究  

Microwave Vacuum Drying Properties and Kinetics Model of Radix Paeoniae Rubra Extract

作　　者：王莹[1] 李页瑞[1] 刘雪松[1] 王龙虎[1] 吴永江[1] 陈勇[1] 

机构地区：[1]浙江大学药学院,杭州310058

出　　处：《中国药学杂志》2011年第12期921-925,共5页Chinese Pharmaceutical Journal

基　　金：浙江省重大科技专项(2008C03005);温州市龙湾区科技发展计划项目"大型工业微波真空低温干燥设备关键技术研究"

摘　　要：目的研究赤芍浸膏微波真空干燥特性,建立其微波真空干燥过程的数学模型。方法分析了不同微波功率、载样量对失水速率及物料温度的影响规律。在此基础上,将试验数据与常用的薄层干燥模型进行拟合检验,建立赤芍浸膏微波真空干燥的水分比与干燥时间关系的动力学模型。结果赤芍浸膏微波真空干燥过程可分为加速、恒速及降速3个干燥阶段;赤芍浸膏微波真空干燥的动力学过程可以用薄层干燥的数学模型Page方程描述。结论该模型预测值与实测值吻合良好,可以准确预测赤芍浸膏微波真空干燥过程中的含水率和失水速率。OBJECTIVE To understand the drying properties of Radix Paeoniae Rubra extract with microwave vacuum drying technique and to establish a suitable kinetics model to describe its drying characteristics. METHODS The effects of various processing conditions, such as microwave power and sample load, on the changes of the moisture content, temperature and the dehydrating rate of Radix Paeoniae Rubra extract were analyzed. The drying curve was drawn. The mathematic model of microwave vacuum drying was established. RESULTS The drying process could be roughly divided into accelerate period, constant rate period and falling rate period. The drying process of Radix Paeoniae Rubra extract could be accurately described by the Page model, the predicted values of the model were nearly consistent with the observed values. CONCLUSION The moisture contents and dehydrating rate during the drying procedure can be exactly estimated by the model.

关 键 词：赤芍浸膏 微波真空干燥 干燥特性 动力学模型 

分 类 号：R283[医药卫生—中药学]