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Study on mathematical model of sweeping gas multiple-effect membrane distillation process
Authors： YANG Dan，GAO Qijun*，LU Xiaolong*，WU Chunrui，CHEN Huayan，WANG Xuan，
JIA Yue
Units： State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Institute of Biological and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China
KeyWords： sweeping gas; multiple-effect membrane distillation; heat recovery; GOR; mathematical model
ClassificationCode：TQ028.8
year,volume(issue):pagination： 2014, 34(5):58-64

Abstract：

A novel sweeping gas multiple-effect membrane distillation process （SGMEMD） was designed based on the high energy consumption of sweeping gas membrane distillation (SGMD) process. The process was set up for the first time with a special latent-heat recovery system where the vapors got condensed and the feed was heated up simultaneously. Thus the latent-heat could be recovery gradually and effectively. The empirical formulas of membrane distillation permeate flux J and heat recovery rate η that describes sweeping gas multi-effect membrane distillation processes (SGMEMD) were presented using curve fitting method, which was according to results of single factor experiment that the effects of sweeping gas flow velocity, feed circulation volumetric flow, feed in temperature and the feed concentration on performance of SGMEMD process were investigated. Based on the empirical formulas, semi theoretical model of GOR was also established. The empirical formulas and semi theoretical model had a high precision  in predicting the J and GOR of SGMEMD process, which had been validated by L9（34）orthogonal experiment. Compared to results of experiment, the calculated value of J and GOR relative deviation were within  8.0 %.

Funds：
国家自然科学基金项目（21176188，21106100），高等学校博士学科点专项科研基金（20111201110004）

AuthorIntro：
杨丹（1989—），男，天津市人，硕士研究生，研究方向为新型膜蒸馏过程研究.*联系人，

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