半焦热载体煤热解过程中颗粒混合特性的模拟研究  

Simulation of particle mixing characteristics during pyrolysis of semi-coke heat carrier coal

作　　者：芦彦至 刘军祥 于庆波 Lu Yanzhi;Liu Junxiang;Yu Qingbo(Northeastern University)

机构地区：[1]东北大学冶金学院

出　　处：《冶金能源》2022年第1期3-7,52,共6页Energy For Metallurgical Industry

摘　　要：文章以固体热载体热解煤工艺为研究背景,采用离散单元法对热载体颗粒与煤颗粒在挡板颗粒混合器中的混合过程进行数值模拟研究。探究挡板混合器结构、热载体粒径和热载体与煤的进料比等因素对混合度的影响。结果表明:采用挡板与壁面夹角30°、相邻挡板旋转60°放置的结构可有效提高混合度;由于颗粒的混合与离析同时存在,通过提高煤的进料比,采用0.004 m大粒径热载体可减弱离析影响,增强混合均匀度。In the paper,based on the solid heat carrier pyrolysis coal technology,the mixing process of heat carrier particles and coal particles in baffle particle mixer was numerically simulated by discrete element method.The influence of baffle mixer structure,particle size of heat carrier and feed ratio of heat carrier to coal on mixing degree was investigated.The results show that the structure with an angle of 30°between the baffle and the wall and a rotation of 60°between the adjacent baffle can effectively improve the mixing degree.Since the mixing and segregation of particles exist at the same time,the feeding ratio of coal can be improved by using 0.004 m large particle size heat carrier to reduce the effect of segregation and enhance the mixing uniformity.

关 键 词：混合特性 挡板结构 煤热解 数值模拟 固体热载体 

分 类 号：TQ530.2[化学工程—煤化学工程]