化学工程2025，Vol.53Issue(2)：64-70,7.DOI:10.3969/j.issn.1005-9954.2025.02.011
扁平型移动床反应器近平推流排料的数值模拟与结构优化
Numerical simulation and structural optimization of approaching to plug-flow discharge in flat moving-bed reactor
摘要
Abstract
A moving-bed pyrolysis reactor featured with flat structure has been developed in recent years to simultaneously considering industrial scale-up and external heat transfer limitation.However,the unreasonable discharge structure of this reactor is easy to cause"bias flow"in particle moving flow and"funnel flow"for continuous particle discharge.Thus,it is urgent to optimize the discharge structure of the flat moving-bed reactor to ensure particle discharge approaching to plug flow.Therefore,the particle flow model of a large flat moving bed reactor was established by using Fluent software,and the discharge system was optimized with the number and size of discharge ports as variables.The results show that decreasing the height of discharge port,increasing the size and number of the discharge port can reduce velocity fluctuation of particles inside the reactor and be favorable to form plug flow.Through simulation optimization,the closest to the horizontal push flow discharge structure is that the number of discharge ports is 5,the height of the discharge port is 1 000 mm and the opening size of the discharge port is 400 mm.While the determination of the number of discharge ports is the core control factor to ensure plug flow.Based on the simulation and optimization,a large-scale cold flow moving-bed device was built.The running results show that the particles flow in the reactor are close to plug flow,which verifies the accuracy of simulations.The results provide theoretical guidance for the design and operation of the moving-bed reactor.关键词
移动床反应器/颗粒流动/数值模拟/结构优化/排料系统设计Key words
moving bed reactor/particle flow/numerical simulation/structure optimization/discharging equipment design分类
化学化工引用本文复制引用
宋晓锋,马世龙,孙正龙,安萍,贾鑫,韩振南,许光文..扁平型移动床反应器近平推流排料的数值模拟与结构优化[J].化学工程,2025,53(2):64-70,7.基金项目
国家自然科学基金委辽宁联合基金重点项目(U1908201) （U1908201）
国家自然科学基金委青年科学基金项目(22208225) （22208225）
