Pitzer理论在反渗透优先吸附——孔流模型中的应用

APPLICATION OF PITZER' S THEORY TO THE PREFERENTIAL SORPTION-CAPILLARY FLOW MODEL OF REVERSE OSMOSIS

在这篇文章中,已将 Pitzer 理论的渗透压公式成功地应用于优先吸附——孔流模型的基本迁移方程组,这实际上是一种对其渗透压计算方法的适宜改进。由纯水透过常数 A 及氯化钠溶质渗透参数(D_(AM)/kδ)规格化的几种醋酸纤维素膜对许多反渗透体系的分离率和产液率的计算工作也已在计算机上完成。计算值与实验结果非常吻合,这说明用 Pitzer 渗透系数公式表述基本迁移方程组中的渗透压是合理实用的。

In this paper,the equation of osmotic pressure in Pitzer's theory is successfully applied to the basic transport equations of the preferential sorpti- on-capillary flow model.In fact,this is a better improvement in calculating osmotic pressure in the model.Solute separation and product rate of number of cellulose acetate membranes,which are specified in terms of their pure water permeability A and solute transport parameter (D_(AM)/Kδ) for sodium chloride,are computerized for a lot of reverse osmosis systems. The values of calculation are extremely in agreement with the results of experiment,therefore,it is reasonable and useful that osmotic pressure in the basic transport equations is described by Pitzer's equation of osmotic coefficient.