刮膜式分子蒸馏液膜停留时间分布特性研究  

Characteristic of residence time distribution of liquid film in wiped film molecular distillation

作　　者：邵平[1] 姜绍通[1] 潘丽军[1] 

机构地区：[1]合肥工业大学生物与食品工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2006年第12期1613-1616,共4页Journal of Hefei University of Technology：Natural Science

基　　金：安徽省自然科学基金资助项目(03041302)

摘　　要：文章采用脉冲示踪法测量了刮膜式分子蒸馏中物料的停留时间分布,研究了示踪剂浓度和电导率强度的关系及刮膜转速、进料速率和物料粘度对停留时间的影响,并与降膜式分子蒸馏停留时间作了比较。结果表明:体系粘度和进料速率增加,物料停留时间加大;刮膜转速由65 r/min增大至200 r/min时,停留时间先增大后减小,存在一个最大值。Residence time detection is carried out for wiped film molecular distillation by the impulse response method. The relationship between the tracer concentration and the conductivity intensity and the influences of wiping speed,liquid＇s viscosity and the feed rate are investigated. The experimental results show that the mean residence time increased with the increase of the viscosity and feed rate of the liquid. The mean residence time developed to the maximum value, following decrease with the in crease of the wiping speed from 65 r/min to 200 r/min.

关 键 词：刮膜式分子蒸馏 液膜 脉冲示踪 停留时间分布 

分 类 号：TS224.4[轻工技术与工程—粮食、油脂及植物蛋白工程]