首页|Numerical study on the filtration characteristics of fine particles in granular bed filter at high temperature

Numerical study on the filtration characteristics of fine particles in granular bed filter at high temperature

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Granular bed filter(GBF)has become one of the current research hot topics due to its excellent per-formance in removing fine particles.In this paper,a three-dimensional fixed bed GBF filtration model was established and its accuracy was verified.Then,the GBF filtration performance at high temperature were studied.The results demonstrate that elevating the temperature diminishes the filtration efficiency,albeit to a limited extent.The increasing of inlet gas velocity can significantly improve pressure drop for GBF and the filtration efficiency for fine particles of sizes larger than 5 μm.As the diameter of stacked granular particle diameter grows,the filtration efficiency and pressure drop drops.The density of fine particles almost does not affect the filtration efficiency for fine particles of 1~7 μm,but a higher density leads to a higher filtration efficiency for fine particles of sizes bigger than 9 μm.Additionally,as the fine particles size increases,the change of the filtration efficiency roughly goes through three stages:Stage 1:the filtration efficiency is basically unchanged;Stage 2:the filtration efficiency increases rapidly;Stage 3:the filtration efficiency increases steadily,but the rate of increase slows down.With the increase of the fine particles Stokes number,the filtration efficiency of GBF will pass through two phases of stabilization and rapid increase.

Granular bed filterFine particlesHigh temperatureFiltration efficiency

Kangning Zhu、Jie Cai、Yuan Li、Xiaoyou Shen、Jianfei Xi、Yunjun Wang、Zhongzhu Gu

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School of Energy and Mechanical Engineering,Nanjing Normal University,Nanjing 210023,China

National Natural Science Foundation of China

51878356

2024

颗粒学报(英文版)
中国颗粒学会 中国科学院过程工程研究所

颗粒学报(英文版)

CSTPCD
影响因子:0.632
ISSN:1674-2001
年,卷(期):2024.93(10)