应用CFD优化螺旋卷式膜组件流道结构

Fluid Flow Channel Optimization of Spiral Wound Membrane Module Using CFD

为探究螺旋卷式膜组件流道结构对流体流动和膜组件分离性能的影响,在对螺旋卷式膜组件中流体流动分离过程进行分析后,对膜组件内含有隔网的流道进行简化建模,利用计算流体力学(CFD)方法对流体在流道中的流动分离情况进行三维模拟计算.以隔网编织方式为变量,考察不同隔网编织方式下流体的流动状态和二氧化碳分离传质效果以确定较优的隔网编织方式.结果表明,隔网编织方式通过影响膜组件流道结构进而改变流体流动形态、剪应力分布、速度分布和压力分布.采用部分编织型隔网时,流体流动压降约为60 Pa/m,二氧化碳分离效率为90%左右,可以同时实现膜组件较优的分离性能和较低的流动压降.

After simplifying the fluid flow channel of spiral wound membrane module, the computational fluid dynamics(CFD) method was used to perform three-dimensional simulation of the fluid flow in the channel. The fluid flow state, the carbon dioxide separation and mass transfer effect using different spacer woven type were investigated. The results show that the partial woven spacer can simultaneously achieve better separation performance and lower pressure drop. Its pressure drop is about 60 Pa/m and percentage of COseparation is about 90%.