Hollow fiber membrane filament structure, method of manufacture and membrane module

By setting throttling elements inside the hollow fiber membrane to form an asymmetric throttling structure, the problems of uneven pressure distribution and condensate accumulation during long-distance air supply are solved, achieving uniform growth of biofilm and efficient wastewater treatment.

CN122399587APending Publication Date: 2026-07-17CHINA THREE GORGES CORPORATION
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA THREE GORGES CORPORATION
Filing Date
2026-06-04
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Hollow fiber membranes suffer from uneven pressure distribution, uneven biofilm growth, and condensate accumulation when supplied with air over long distances, which affect wastewater treatment efficiency and equipment reliability.

Method used

Throttling elements are installed within the membrane fiber body to form an asymmetric throttling structure. Pressure loss is dispersed by controllable local resistance elements distributed along the flow path, and the cavity structure between the throttling elements is used to achieve segmented isolation of condensate, thus avoiding water seal failure.

Benefits of technology

It achieves uniformity of gas supply over long distances, improves the uniformity of biofilm and membrane area utilization, reduces condensate accumulation, and enhances the operational stability and processing efficiency of the equipment.

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Abstract

This invention relates to the field of wastewater treatment equipment technology, and discloses a hollow fiber membrane structure, its preparation method, and a membrane module. The hollow fiber membrane structure includes a membrane filament body and throttling elements. The membrane filament body is filamentous with an internal cavity. One end of the membrane filament body has an inlet, and the other end has an outlet or is closed. Several throttling elements are spaced apart on the inner wall of the membrane filament body, forming a non-throttling zone between adjacent throttling elements. The throttling elements and non-throttling zones are distributed alternately. This invention breaks the traditional technical prejudice that "the more unobstructed the internal cavity of the membrane filament, the better." By setting throttling elements in the internal cavity of the membrane filament body, a controllable local resistance element is actively introduced. Through an asymmetric throttling structure distributed along the membrane filament, the pressure loss originally concentrated at the end is dispersed throughout the entire membrane filament, thereby reconstructing the pressure distribution curve and achieving uniformity of air supply over long distances. At the same time, the cavity structure between the throttling elements achieves segmented isolation of condensate, preventing water seal failure.
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