连续逆流提取黄芪多糖过程扩散返混数值模型的构建及单元化验证  

Construction and unitization verification of diffusion and backmixing model for continuous countercurrent extraction of Astragalus polysaccharide

作　　者：毛琳璐 孙朋垚 张霞[1,2] 李琳 李玉婷[3] 梁毅 李冰 MAO Lin-Lu;SUN Peng-yao;ZHANG Xia;LI Lin;LI Yu-ting;LIANG Yi;LI Bing(School of Food Sciences and Engineering,South China University of Technology,Guangzhou,Guangdong 510640,China;Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety,South China University of Technology,Guangzhou,Guangdong 510640,China;Dongguan University of Technology,Dongguan,Guangdong 523000,China;Guangdong Zhongqing Font Biochemical Science and Technology Co.,Ltd.,Maommg,Guangdong 525427,China)

机构地区：[1]华南理工大学食品科学与工程学院,广东广州510640 [2]广东省天然产物绿色加工与产品安全重点实验室,广东广州510640 [3]东莞理工学院,广东东莞523000 [4]广东中轻枫泰生化科技有限公司,广东茂名525427

出　　处：《食品与机械》2020年第1期42-49,共8页Food and Machinery

基　　金：国家重点研发计划资助项目(编号：2016YFD04003031);广东省“扬帆计划”引进创新创业团队项目(编号：2014YT02S029)

摘　　要：建立了扩散返混数学模型并求解,描述了单流程连续逆流提取器内两相溶质的分布;建立了用于描述中试规模的单流程连续逆流提取器内两相溶质分布的扩散返混数值模型,采用多效模拟连续逆流提取黄芪多糖进行验证,结果表明,在提取温度40〜70℃、固液比1:6〜1:14(g/mL)、提取时间40〜70 min的单因素变化范围内,模型预测分布和实际提取样本浓度的相对误差≤15%,具有一定的实用价值,能够实现稳态条件下连续逆流提取过程两相浓度的预测。;In order to realize the accurate description of the extraction process of continuous countercurrent extraction(CCE)for Astragalus polysaccharides,a mathematical model of diffusion and backmixing was established and solved.The two-phase solute distribution in the single-flow continuous counter-current extractor was described.The scale for describing the pilot scale was established.The diffusion back-mixing numerical model of the two-phase solute distribution in the extractor was tested by multi-effect simulation CCE of Asti-agalus polysaccharides.The results showed that the extraction temperature was 40-70℃,and the solid-liquid ratio was 1:6〜1:14(g/mL),withm the single factor variation range of extraction time 40~70 min,the relative error between the model prediction distribution and the actual sample concentration is controlled≤15%,which has cer-tain practical value.The model can realize the achieve prediction of the concentration of the two phases in the extraction process of CCE under steady state conditions.

关 键 词：连续逆流提取 数学建摸 黄芪多糖 扩散 返混 

分 类 号：TQ281[化学工程—有机化工]