化工学报2026，Vol.77Issue(4)：1755-1767,13.DOI:10.11949/0438-1157.20251066
连续进料多腔室流化床停留时间分布数值模拟
Numerical simulation of residence time distribution in multi-chamber fluidized bed with continuous feeding
摘要
Abstract
To reveal the hydrodynamic characteristics and particle residence time distribution(RTD)patterns of a multi-chamber fluidized bed reactor,and to optimize its structure and operational parameters,a numerical model of a continuously fed bubbling fluidized bed was developed using the Eulerian-Eulerian two-fluid model with species transport equations.Comparative simulations were carried out for baffle-free fluidized beds and multi-chamber beds under varying baffle opening heights,outlet tube heights,immersed tube bundle configurations,and solid feed rates.The gas-solid flow patterns,RTD,and back-mixing behavior were systematically evaluated.The results show that the multi-chamber baffled bed effectively suppresses bubble growth and promotes uniform hydrodynamics across chambers.The baffle structure makes the RTD approach plug flow,increases the average particle residence time by 14.5％,and reduces the variance from 0.79 to 0.58,with an orifice height of 20 mm being optimal.Reducing bed height shortened residence time by 45.2％but had limited mixing benefits,while adding immersed tubes further reduced variance by 15.1％.Decreasing the solid feed rate from 80 g/s to 60 g/s increased average residence time but intensified back-mixing.This study offers theoretical and practical insights for the design and scale-up of high-performance calcium looping reactors for thermochemical energy storage.关键词
流化床/流体动力学/多腔室/停留时间/数值模拟Key words
fluidized bed/hydrodynamics/multi-chamber/residence time/numerical simulation分类
化学化工引用本文复制引用
郭晓蝶,周文静,魏进家..连续进料多腔室流化床停留时间分布数值模拟[J].化工学报,2026,77(4):1755-1767,13.基金项目
国家重点研发计划项目(2021YFF0500400) （2021YFF0500400）
陕西省秦创原"科学家+工程师"队伍建设项目(2022KXJ-179) （2022KXJ-179）
