Structural optimization of a radial microchannel separator applied to the filtration of PM2.5

IF 4.6 2区工程技术 Q2 ENGINEERING, CHEMICAL Powder Technology Pub Date : 2025-03-31 Epub Date: 2025-01-30 DOI:10.1016/j.powtec.2025.120726

Yanan Chen , Jiaxin Jing , Liang Ma , Shenggui Ma , Yongpeng Diao , Kai Zheng , Jianping Li , Xia Jiang , Hualin Wang , Pengbo Fu

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Abstract

Fine particulate matter (PM_2.5) is difficult to separate due to its small particle size, the microchannel separator demonstrates excellent separation performance, while structural design and bed regeneration are the difficulties. In this study, the velocity and pressure drop in the axial and radial microchannel separator were compared by computational fluid dynamics—discrete element method coupling model (CFD-EDEM), and the effects of different structural parameters on the separation performance were explored in depth experimentally to enhance the separation of PM_2.5. The results show that the radial microchannel separator wins by having a lower pressure drop, giving it a significant advantage in energy consumption. The average PM_2.5 removal efficiency of the radial microchannel separator is as high as 97.17 % and a pressure drop of only 1.76 kPa. Moreover, the in-situ regeneration efficiency of granular bed medium can reach 63.48 %. This study provides an essential reference for the purification of PM_2.5 in high temperature smoke and the optimization of the structural parameters of the microchannel separator.

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用于PM2.5过滤的径向微通道分离器的结构优化

细颗粒物（PM2.5）因其粒径小而难以分离，微通道分离器具有优异的分离性能，但结构设计和床层再生是难点。本研究采用计算流体力学-离散元法耦合模型（CFD-EDEM）对轴向和径向微通道分离器内的速度和压降进行了比较，并通过实验深入探讨了不同结构参数对分离性能的影响，以增强PM2.5的分离效果。结果表明，径向微通道分离器具有较低的压降，从而在能耗方面具有显着优势。径向微通道分离器的PM2.5平均去除率高达97.17%，压降仅为1.76 kPa。颗粒床介质的原位再生效率可达63.48%。本研究为高温烟气中PM2.5的净化及微通道分离器结构参数的优化提供了必要的参考。

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.