铀矿冶2026，Vol.45Issue(2)：49-60,12.DOI:10.13426/j.cnki.yky.2025.10.07
移动床吸附塔内颗粒沉降与磨损影响的CFD-DEM数值模拟
CFD-DEM Numerical Simulation of Particle Settling and Wear in a Moving Bed Adsorption Tower
卿唐彦庭 1雷洁珩 2雷林 3邓健 1雷泽勇 1杨一鸣1
作者信息
- 1. 南华大学机械工程学院,湖南衡阳 421001
- 2. 南华大学电气工程学院,湖南衡阳 421001
- 3. 南华大学资源环境与安全工程学院,湖南衡阳 421001
- 折叠
摘要
Abstract
To improve the extraction efficiency of uranyl ions in a moving bed adsorption tower and re-duce the loss of saturated resin,a geometric model incorporating key internal components was estab-lished using a coupled CFD-DEM approach,with model reliability validated against experimental data.Systematic simulations of particle settling under varying inlet flow rates were conducted,focusing on the kinetic behavior at the optimal flow rate.Based on these findings,structural optimizations were implemented,and the particle flow and collision characteristics before and after optimization were compared.The simulation results indicate that the particle settling process can be divided into three distinct stages:initial uniform settling,accelerated directional transport,and energy dissipation depo-sition.Local vortices induced by the liquid distribution device predominantly govern particle spatial distribution,leading to accumulation in the bottom region of the tower.At the optimal flow rate,over 90％of particles reside in the low-velocity range,indicating significant collective stability within the system.Particle contact statistics reveal that wear risk primarily stems from particle-particle colli-sions rather than particle-structure interactions.Comparative analysis of different flow rates demon-strates that velocity markedly influences particle collision frequency and energy by altering the flow field kinetic energy.While the optimized design improves particle distribution uniformity,it also re-sults in a slight increase in collision energy,highlighting a trade-off between flow homogenization and collision dynamics.This study elucidates the microscopic mechanisms of particle transport and wear in moving bed adsorption towers,providing a theoretical basis for the optimization of devices and the regulation of operational parameters.关键词
移动床吸附塔/饱和树脂颗粒/CFD-DEM/颗粒沉降/数值模拟/颗粒磨损/颗粒动力学Key words
moving bed adsorption tower/saturated resin particles/CFD-DEM/particle settling/nu-merical simulation/particle wear/particle dynamics分类
化学化工引用本文复制引用
卿唐彦庭,雷洁珩,雷林,邓健,雷泽勇,杨一鸣..移动床吸附塔内颗粒沉降与磨损影响的CFD-DEM数值模拟[J].铀矿冶,2026,45(2):49-60,12.
