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中文摘要：
中药提取过程是一个典型的多相流过程,其提取过程中的容器温度,物料分布,饱和度等参数用常规方法探测较难,直接影响提取效率。本文尝试将电容层析成像技术应用到中药的提取工艺当中,以天然中药丹参和有机溶剂乙醇为研究对象,采用动态逆流循环提取工艺,提出了一种细化有限元单元边长的剖分和快速计算精确的电容值的方法,给出了改进方法的数学模型,将改进的方法应用到数学模型求解过程中,得出了符合实际应用物理系统的计算值,并对系统内两相流的变化规律对提取效率的影响进行分析。
英文摘要：
Traditional extraction of Chinese medicine is a typical multi-phase flow process.Applying traditional methods,it is difficult to detect temperature of container,distribution of materials,saturation and other parameters,and if the result is not accurate, it will lead to low efficiency.In this paper,ECT（electrical capacitance tomography） technology is applied to the extraction of Chinese medicine.Natural salia miltiorrhiza and organic solvent ethanol are studied as objects,dynamic countercurrent circulation extraction technique is adopted,and a new method to compute capacitance values is put forward.In this method,an improved mathematical model is built to refine length of finite element unit and calculate capacitance values rapidly.The computed values are consistent with the actual physical model,and in the last part of this paper,the effect of variation of two-phase flow on extraction efficiency is analyzed.
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