浓缩苹果汁加工中不溶物分离技术研究  

Separation of the insoluble substance in concentrated apple juice

作　　者：曲昆生 刘芳[2] 于东华 赵庆富 倪元颖[2] 

机构地区：[1]北方安德利果汁股份有限公司,山东省苹果精深加工技术重点实验室,烟台264100 [2]中国农业大学食品科学与营养工程学院,国家果蔬加工工程技术研究中心,北京100083

出　　处：《食品科技》2013年第12期90-94,共5页Food Science and Technology

基　　金：山东省苹果精深加工技术重点实验室建设计划项目

摘　　要：比较了4种不同分离方式对超滤罐底物和酶解汁中不溶物的分离效果。实验结果表明:采用卧螺分离机可将超滤罐底物中的不溶物降低到10%。采用碟片分离机分离酶解汁中的不溶物,超滤运行21 h的平均通量为22.7 m3/h,比正常工艺高11.8%。采用先卧螺分离再用碟片分离的工艺分离超滤罐底物中的不溶物,超滤运行20 h的平均通量与正常工艺相当。采用400目的板框压滤机去除酶解汁中不溶物时,可将罐底物中的不溶物降低到2%,超滤运行20 h的平均通量为30.4m3/h,比正常工艺提高50.78%。For issues of active heat dissipation performance and effective thermal conductivity of the sandwich cylinder with cellular materials, the effective thermal conductivity including the effects of active heat dissipation of the sandwich cylinder was calculated, and its relationships with the relative density and the speed of the fluid were obtained by deriving the effective thermal conductivity and thermal governing equation under the heat convection boundary conditions. By considering the effective thermal conductivity of active heat dissipation, the transient temperature of the sandwich cylinder was calculated and compared with the result obtained by finite element method. Meanwhile, the relationship between the relative density and heat dissipation performance of the unit cells was obtained, and the optimal relative density and the optimal thickness corresponding to the maximum heat dissipation index in different dividing parts were also obtained. By comparing the transient temperature obtained by theoretical solutions using the effective thermal conductivity including the effects of active heat dissipation with FE simulations, the results are nearly the same, indicating the correct effective thermal conductivity and the accuracy to calculate the temperature of the structure. At the same time, the study demonstrates that the effective thermal conductivity increases with the decrease of the velocity of the fluid and the increase of the relative density of the structure. The Square and Hexagon have the best heat dissipation capability in the same mass quantity.

关 键 词：苹果汁 不溶物 超滤 通量 

分 类 号：TS255.3[轻工技术与工程—农产品加工及贮藏工程]