不可逆反渗透分离过程的性能分析

在内可逆反渗透过程模型的基础上,进一步考虑了反渗透模块的摩擦损失(压力降)、水泵和水轮机的流动阻力和效率对反渗透分离过程性能的影响,建立了不可逆反渗透分离过程模型,应用有限时间热力学理论和流体流动做功装置原理对其进行研究。结果表明,增大纯水回收率或水泵效率可提高系统的热效率,增大进料压力或水轮机效率可提高纯净水的流量,而反渗透模块的摩擦损失对系统性能的影响较小。同时,也证明了反渗透分离过程消耗的功率存在最大值,即机械火用转化为化学火用的转化率有最大值。

Performance Analysis of an Irreversible Reverse Osmosis Separation Process

On the basis of a model for an inner reversible reverse osmosis process and with a further consideration of the influence of the friction loss of the reverse osmosis module (pressure drop),the flow resistance and efficiencies of a water pump and water turbine on the performance of a reverse osmosis separation process,set up was a model for an irreversible reverse osmosis separation process. Moreover,an investigation of the process has been performed by using the theory of finite time thermodynamics and the ...