膜科学与技术

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Research on the internal structure design and
flux optimization of rolled membrane

Authors： DAI Qijun, KANG Yan， WU Zongce， JIN Yan， HAN Qianwu， ZHANG Lingling， TANG Lun

Units： Vontron Technology Co., Ltd., Guiyang 550000, China

KeyWords： rolled membrane element; component configuration; permeate-side spacer flow resistance; pressure loss; mathematical model

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2025,45(2):173-183

Abstract：

In order to study the mismatch between the water yield of rolled membrane elements and the membrane performance, computational fluid dynamics (CFD) was used to simulate the pressure distribution of retentate spacer and permeate-side spacer flow channels in rolled membrane elements, and the pressure loss of permeate-side spacer flow channels was calculated by establishing a mathematical model of water production flow of rolled membrane elements. The results showed that the pressure drop gradient in the flow channel was along the direction of the vortex line, and the pressure drop gradient became larger with the increase of accumulated pure water. In eight-inch industrial membrane elements with different configurations under different conditions, the total pressure loss of the permeate-side spacer flow channel was in the range of 60~170 kPa. When the membrane page length was shortened, the flow resistance coefficient of the permeate-side spacer flow channel was reduced, and the thickness of the permeate-side spacer flow channel was increased, the total pressure loss of the permeate-side spacer flow channel was reduced, and the water production of the membrane element was increased. For low-resistance membrane, the difference in water production of membrane elements with different configurations was up to 14%, while for high-resistance membrane, the difference in water production of membrane elements with different configurations was only 4.8%, and the difference in water production of membrane elements was more significant in low-resistance membrane. The mathematical model developed in this paper can be used to quantitatively calculate the water production of membrane elements under different configurations, different flow resistance networks and different operating conditions, and to evaluate the difference between its performance and that of the diaphragm, and to determine the space of water production flow improvement.

Funds：

耐温型有机膜制备与应用关键技术研究（2023YFB3810500）

AuthorIntro：

戴启军（1987-），男，贵州兴义人，硕士研究生，工程师，研究方向为膜组件设计及开发

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