Simulation study on direct contact membrane distillation modules for high-concentration nacl solution

doi:10.3390/membranes10080179

CORC > 兰州理工大学 > 兰州理工大学

	Simulation study on direct contact membrane distillation modules for high-concentration nacl solution
	Ni, Weiming 2; Li, Yongli 2; Zhao, Juezhen 2; Zhang, Gaoyuan 2; Du, Xiaoze 1; Dong, Yingchao 3
刊名	Membranes
	2020-08-01
卷号	10 期号:8 页码:1-18
关键词	Atmospheric pressure Distillation Distilleries Evaporation Mass transfer Polarization Pore size Sodium chloride Temperature Thermal conductivity Velocity Water treatment Direct contact membrane distillation Effects of temperature Heat and mass transfer Membrane distillation Solution concentration Temperature polarization User Defined Functions Water treatment technologies
DOI	10.3390/membranes10080179
英文摘要	Membrane distillation technology, as a new membrane-based water treatment technology that combines the membrane technology and evaporation process, has the advantages of using low-grade heat, working at atmospheric pressure with simple configuration, etc. In this study, heat and mass transfer were coupled at the membrane surfaces through the user-defined function program. The effects of feed temperature, feed velocity and permeate velocity on temperature polarization were mainly investigated for a high-concentration NaCl solution. The temperature polarization was increased with the increase of feed temperature and the decrease of feed and permeate velocity. The effects of temperature, inlet velocity and solution concentration on the evaporation efficiency of the membrane module for co-and counter-current operations were investigated in detail. The counter-current operation performed better than co-current operation in most cases, except for the condition where the NaCl concentration was relatively low or the module length was long enough. In addition, the optimal membrane thickness for both PVDF and PTFE was studied. The optimal membrane thickness was found in the range of 10 to 20 µm, which corresponded to the highest permeate flux for the selected materials, pore size distribution, and operation conditions. Membrane material with lower thermal conductivity and larger porosity was prone to get higher permeate flux and had larger optimal membrane thickness. Increasing feed velocity or feed temperature could decrease the optimal membrane thickness. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
WOS研究方向	Biochemistry & Molecular Biology ; Chemistry ; Engineering ; Materials Science ; Polymer Science
语种	英语
出版者	MDPI AG, Postfach, Basel, CH-4005, Switzerland
WOS记录号	WOS:000567109600001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115585]
专题	兰州理工大学能源与动力工程学院新能源学院
作者单位	1.School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Key Laboratory of Power Station Energy Transfer Conversion and System (North China Electric Power University), Ministry of Education, Beijing; 102206, China; 3.School of Environmental Science and Technology, Dalian University of Technology, Dalian; 116024, China
推荐引用方式 GB/T 7714	Ni, Weiming,Li, Yongli,Zhao, Juezhen,et al. Simulation study on direct contact membrane distillation modules for high-concentration nacl solution[J]. Membranes,2020,10(8):1-18.
APA	Ni, Weiming,Li, Yongli,Zhao, Juezhen,Zhang, Gaoyuan,Du, Xiaoze,&Dong, Yingchao.(2020).Simulation study on direct contact membrane distillation modules for high-concentration nacl solution.Membranes,10(8),1-18.
MLA	Ni, Weiming,et al."Simulation study on direct contact membrane distillation modules for high-concentration nacl solution".Membranes 10.8(2020):1-18.