连续逆流萃取设备流场的仿真分析

Stimulation of Counter-Current Extraction Machine Fluid

连续逆流提取设备因其成本低、效率高、可连续作业的特点近年来在中药提取行业应用越来越广泛,但是关键部分提取节仍然存在着浮料以及沉料的问题,文章对物料进行运动学分析,再利用FLUENT软件对某公司螺旋式连续逆流提取设备流场进行仿真分析,获得物料在流体中的流速流向数据及其分布情况,其与实验数据一致性较高。结合运动学分析与仿真结果,使用UG软件设计了扰流板及其固定结构,通过对优化前后模型进行对比分析,证明优化后模型能够有效地解决浮料以及沉料的问题。

Counter-current extraction machine is being equipped in a growing number of facilities because of its high efficiency and low cost and continuous processing,but the key extraction part still has issues that not solved,such as material floating and material sinking. In this paper,the kinematics analysis of material was analyzed first,then Fluent was used to launch the stimulation of the current model,the volume fraction data and velocity of the particle data was got from the stimulation result which is in line with experimental results. The spoiler and its fixed structure are designed in UG according to kinematics analysis and stimulation data. Compared the results of two model,the conclusion that the refined model of the screw is very efficiency in solving the problem of anti-material floating and sinking.