摘要
膜元件的回收率与过程的透液量、压强差、费用和流体在膜分离系统的流动状态等有关,因此它是一个关键性的参数.导出了雷诺数和回收率之间的关系,并确定50%回收率为一个膜组件回收率的临界值.由物料衡算关系导出膜分离装置的总回收率、各膜组件分回收率和膜分离段数之间的数学关系.对于回收率大于50%的多段膜分离系统,通过引入权重因子以区别各段分回收率对总回收率贡献的大小,用导出的数学表达式和权重因子求得最佳组合关系.
The recovery ratio is a key parameter that is related with water permeability, pressure drop, cost and the motion type of fluid flowing through the membrane separation system, and so on. Fifty percent of the recovery ratio is considered to be a critical recovery ratio for one module, based on the relation between the Reynolds number and recovery ratio. The model of relation among total recovery ratio, partial recovery ratio and stages needed in a membrane separation is established in terms of the mass balance. For the multi-stages system with the recovery ratio over 50%, the optimization configuration can be determined by using the model and the weight factor that weighs the partial recovery ratio against total recovery ratio.
出处
《膜科学与技术》
CAS
CSCD
北大核心
2005年第2期61-64,共4页
Membrane Science and Technology
