一种涉及CFD模拟的新型方案，用于设计和优化螺旋缠绕纳滤隔离片：从方法建立到过滤性能的改进

IF 8.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination Pub Date : 2025-04-11 DOI:10.1016/j.desal.2025.118884

Qi Wang , Guorui Wu , Songwen Yang , Haohang Shi , Feiyun Sun , Wenyi Dong , Dingyu Xing , Jia Guo , Linfeng Huang

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引用次数: 0

摘要

一个优化的几何结构间隔器被寄予厚望，以提高传质和降低操作压力的膜过滤性能。然而，目前还缺乏结合不同结构参数综合预测隔片过滤性能的高精度仿真方法，从而可靠地设计和修改隔片的几何结构（灯丝形状、厚度和角度），从而达到节能的目的。在本研究中，基于计算流体动力学（CFD）方法代码ANSYS Fluent，成功建立了高精度（~ 1.0%）的三维仿真模型。设计并优化了纳滤（NF）膜模块的商用隔层几何构型，同时分析了膜过滤过程中的进料通道压力（FCP）下降、壁剪应力、溶质浓度和传质系数。结果表明，在水力直径为8 mm的环形通道内，采用长高比为0.50、角度约为75°的改进圆形间隔块，可显著提高水力壁面剪应力52.6%。因此，在MgSO4溶液的过滤过程中，与未改性的隔离剂相比，它减少了31.4%的FCP下降。结果表明，在一系列的过滤试验中，水通量稳定增加，FCP下降减小。“权衡”效应被成功地克服了。最重要的是，经过改进的间隔剂的纳滤膜过滤在阻止污染物沉积方面表现出更好的能力。滤饼层的结垢率和水阻力均降低了近10%，从而提高了渗透通量。本研究报道了一种可靠可行的隔膜设计与优化方案，不仅可以提高膜过滤技术的实用性和环境适用性，还可以保证高效可控的能耗。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

A novel protocol involving CFD simulation to design and optimize spacers for spiral wound nanofiltration: From methodological establishment to improvement of filtration performance

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A novel protocol involving CFD simulation to design and optimize spacers for spiral wound nanofiltration: From methodological establishment to improvement of filtration performance

An optimized geometric configuration spacer is highly expected to enhance mass transfer and reduce operating pressure for membrane filtration performance. However, there is lack of high-accuracy simulation method to comprehensively predict spacer filtration properties combined with varied structural parameters, which can reliably design and modify spacer geometric structure (filament shape, thickness and angle) that is essential to save energy. In this study, a 3D simulation model with high accuracy (∼1.0 %), is successfully established highly based on computational fluid dynamics (CFD) method code ANSYS Fluent. We designed and optimized commercial spacer geometric configuration for nanofiltration (NF) membrane module simultaneously analyzing feed channel pressure (FCP) drop, wall shear stress, solute concentration and mass transfer coefficient during membrane filtration. The results demonstrated that within an annular channel featuring an 8 mm hydraulic diameter, a modified circular spacer characterized by a length-to-height ratio of 0.50 and an angle of approximately 75° significantly enhanced the hydraulic wall shear stress by 52.6 %. Therefore it reduced the FCP drop by 31.4 % during the filtration of MgSO₄ solution compared to unmodified spacer. As a result, stably enhanced water flux and reduced FCP drop were observed in a series of filtration tests. A “trade-off” effect was successfully overcome. Most significantly the NF membrane filtration with a modified spacer displayed improved capability in hindering foulants deposition. Both cake layers fouling rate and water resistances decreased by nearly 10 %, resulting in an improved permeation flux. This study reported a reliable and feasible protocol for spacers design and optimization, which can not only improve the practicability and environmental applicability of membrane filtration technologies, but also ensures efficient and controllable energy consumptions.

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来源期刊

Desalination 工程技术-工程：化工

CiteScore

14.60

自引率

20.20%

发文量

619

审稿时长

41 days

期刊介绍： Desalination is a scholarly journal that focuses on the field of desalination materials, processes, and associated technologies. It encompasses a wide range of disciplines and aims to publish exceptional papers in this area. The journal invites submissions that explicitly revolve around water desalting and its applications to various sources such as seawater, groundwater, and wastewater. It particularly encourages research on diverse desalination methods including thermal, membrane, sorption, and hybrid processes. By providing a platform for innovative studies, Desalination aims to advance the understanding and development of desalination technologies, promoting sustainable solutions for water scarcity challenges.