膜科学与技术

直接接触膜蒸馏过程的模拟和实验研究

作者：王兆春¹，于超¹，彭跃莲¹，李哲浩²

单位： 1北京绿色催化和分离重点实验室,北京工业大学环境与能源工程学院,Tel 86-10-67392393,Fax 86-10-67391983, Email: pyl@bjut.edu.cn 2长春黄金研究所, Tel 86-431-85529839, Fax 86-431-85518644, Email: zhehaoli888@sohu.com

关键词：直接接触式膜蒸馏；传递模型；膜通量；热效率

DOI号：

分类号： TQ028.8

出版年,卷(期):页码： 2016,36(4):67-74

摘要：

建立了直接接触式膜蒸馏（DCMD）的传递模型，对膜蒸馏过程中膜通量和热效率等影响因素进行了详细研究。实验探索了膜蒸馏热侧进口温度、冷侧和热侧流量对过程的影响，为膜通量和热效率优化提供依据。结果表明，热侧进口温度升高、热侧和冷侧流量增加均有助于膜通量增加；热侧进口温度升高、热侧流量增加和冷侧流量减小均有利于提高热效率。膜通量取决于传质推动力，即蒸汽压差；热效率取决于平均膜面温度，凡是有利于膜面温度提高的操作条件都会增大热效率。

The effects of operating conditions (feeding temperature, hot and cold side flow) on flux and thermal efficiency was performed. Heat and mass transfer model of direct-contact membrane distillation (DCMD) based on hollow fiber membrane was use to analyze the mechanism. The results showed that the flux increased with the increase of feed temperature, hot and cold side flow, which greatly increased the vapor pressure difference across membrane and mass transfer driving force, but had limit effect on mass transfer coefficient. The increase of feed temperature and hot side flow and the decrease of cold side flow helped to improve the thermal efficiency for higher average membrane temperature.

基金项目：

国家自然科学基金的支持(21576004)

作者简介：

第一作者简介：王兆春,1982年,女,山东蓬莱人,硕士研究生,蓬莱市北沟经济发展服务中心工作,膜蒸馏方向,86885709@qq.com.

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