新型流道强化气隙式膜蒸馏的实验研究

兰州理工大学学报 ›› 2025, Vol. 51 ›› Issue (3): 41-47.

新型流道强化气隙式膜蒸馏的实验研究

吴江波, 马峰, 杜小泽^*, 郭新瑞

兰州理工大学能源与动力工程学院, 甘肃兰州 730050

收稿日期:2022-12-20 出版日期:2025-06-28 发布日期:2025-06-30
通讯作者: 杜小泽(1970-),男,河北安国人,博士,教授.Email:duxz@ncepu.edu.cn
基金资助:
国家自然科学基金(52130607)

Experimental study of a new flow channel enhanced air gap membranedistillation

WU Jiang-bo, MA Feng, DU Xiao-ze, GUO Xin-rui

College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China

Received:2022-12-20 Online:2025-06-28 Published:2025-06-30

摘要/Abstract

摘要： 膜蒸馏技术属于可用工业低温余热驱动的水回收手段,在废水处理领域极具推广前景.在气隙式膜组件的热料液流道中加入不同尺寸的半圆柱形挡板,构建多种新型流道的膜组件;同时,建立实验台,在冷热料液入口温度和流量不同时对多种新型膜组件的膜通量和热效率开展系统性的实验研究.结果表明,热料液入口温度、流量和冷料液流量都与膜通量正相关,冷料液入口温度与膜通量负相关,热料液入口温度与热效率正相关.随着热流道中半圆柱形挡板的尺寸增大,相比未添加挡板的膜组件,新型膜组件的膜通量分别增大了4.3%、6.4%和8.7%,热效率分别提高了2.4%、3.4%和4.8%.由此说明,新型膜组件的构型具有膜通量大、热效率高的优势,可为高效气隙式膜蒸馏组件的开发提供优化基础.

关键词: 气隙式膜蒸馏, 传热传质, 新型流道, 废水处理

Abstract: Membrane distillation is very promising in the field of wastewater treatment as a means of water recovery method driven by industrial low-temperature waste heat. A variety of new membrane modules with different sizes of semi-cylindrical baffles were constructed by incorporating different sizes of hot liquid flow channels in the air-gap membrane modules. A test rig was set up to systematically investigate the membrane flux and thermal efficiency of the new modules under different conditions of hot and cold liquid inlet temperatures and flow. The results show that the hot feed inlet temperature and flow as well as the cold feed flow are positively correlated with membrane flux, while the cold feed inlet temperature is negatively correlated with membrane flux. Additionally, the hot feed inlet temperature is positively correlated with thermal efficiency. In the new modules, as the size of the semi-cylindrical baffle in the hot channel increases, the membrane flux increases by 4.3%, 6.4%, and 8.7%, respectively, and the thermal efficiency increases by 2.4%, 3.4%, and 4.8%, respectively, compared with the module without the baffle. The results indicate that this new module configuration has the advantages of high flux and high thermal efficiency, providing an optimized basis for the development of high-efficiency air-gap membrane distillation modules.

Key words: air-gap membrane distillation, heat and mass transfer, new flow channel, wastewater treatment

中图分类号:

TK124

吴江波, 马峰, 杜小泽, 郭新瑞. 新型流道强化气隙式膜蒸馏的实验研究[J]. 兰州理工大学学报, 2025, 51(3): 41-47.

WU Jiang-bo, MA Feng, DU Xiao-ze, GUO Xin-rui. Experimental study of a new flow channel enhanced air gap membranedistillation[J]. Journal of Lanzhou University of Technology, 2025, 51(3): 41-47.

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