超滤对血液透析传质性能的影响

本文对空心纤维型血液透析器中的传质过程进行了研究,提出了伴有超滤的血液透析过程中血液一侧传质的数学模型,并用分离变量法获得了该模型的分析解.实验数据表明,用该模型能较好地描述具有超滤的血液透析过程的传质机理.

Effect of Ultrafiltration on Mass Transfer Characteristics of Hemodialysis

Mass transfer characteristics of hemodialysis in a hollow fiber dialyzer was studied and a relatively simplified theoretical model was proposed by assuming 2-dimensional and axi-symmetrical flow of a Newtonian fluid accompanied by convective mass transfer across the semi-permeable membrane. The permeation rate was assumed to be small and constant, and the dialysate flow channel was regarded as a perfect mixing-pool.Experiments were carried out by using dog blood in the conditions based on the authers model. Comparison of the theoretical results and experimental date showed that the dependence of mass transfer coefficient on ultra-filtration could be expressed by a linear equation. The error between the theoretical results and expe rmental data was less than 15%.