干熄炉料钟结构对焦炭布料粒径均匀度影响的模拟研究  

Influence of bell structure of coke dry quenching furnace on coke distribution

作　　者：黄俊豪 庞克亮 孙方远 刘福军 谷致远 韩龙 段衍泉 冯妍卉 HUANG Junhao;PANG Keliang;SUN Fangyuan;LIU Fujun;GU Zhiyuan;HAN Long;DUAN Yanquan;FENG Yanhui(School of Energy and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China;Ansteel Beijing Research Institute Co.,Ltd.,Beijing 102211,China;Ansteel Iron&Steel Research Institute,Anshan 114009,Liaoning,China;ACRE Coking&Refractory Engineering Consulting Corporation,MCC,Dalian 114001,Liaoning,China)

机构地区：[1]北京科技大学能源与环境工程学院,北京100083 [2]鞍钢集团北京研究院有限公司,北京102211 [3]鞍钢集团钢铁研究院,辽宁鞍山114009 [4]中冶焦耐(大连)工程技术有限公司,辽宁大连114001

出　　处：《化工学报》2024年第S01期158-169,共12页CIESC Journal

基　　金：鞍钢集团北京研究院“鲅鱼圈干熄焦装置模拟与优化”项目。

摘　　要：干熄炉内焦炭粒径偏析问题会严重影响焦炭与冷却气体的气固换热效率。基于离散元方法(DEM)研究某钢厂干熄炉的料钟结构在装焦过程产生的料面形状、粒径分布以及粒径偏析现象,并针对干熄炉的料钟结构进行了优化,以改善焦炭粒径分布。结果表明:相比于料钟倾角和分料板夹角,横梁方向对料面形状和粒径均匀度的影响更大。由于料钟横梁对焦炭颗粒有分流作用,容易形成倾斜堆积料面,导致焦炭颗粒分布不均匀。旋转横梁方向与焦罐布料开口平行后,减弱了料面倾斜效应,降低了焦炭颗粒粒径偏析情况。在40°~60°的料钟倾角、30°~60°的分料板夹角和横梁方向优化条件下,料面高度差最大降低70.8%,标准偏差降低最高49.4%,尤其在较大的倾角和夹角值下效果显著,有助于气体在填充床中均匀流动。The problem of coke particle size segregation in the coke dry quenching(CDQ)furnace can seriously affect the gas-solid heat transfer efficiency.Based on the discrete element method(DEM),this study investigates the actual material surface shape,particle size distribution,and particle size segregation phenomenon generated during the coke loading process of a steel plants coke dry quenching furnace.Reasonable optimization is carried out on the material surface of the coke dry quenching furnace to improve the particle size distribution of the stacked material surface.The results show that compared to the inclination angle of the bell and the angle between the dividing plate,the direction of the beam has a greater impact on the shape and particle size uniformity of the material surface.Due to the diversion effect of the bell beam on coke particles,it is easy to form inclined stacking material surfaces,resulting in uneven distribution of coke particles.After the direction of the rotating beam is parallel to the opening of the coke pot,the inclining effect of the material surface is weakened,and the segregation of coke particle size is reduced.Under the optimized conditions of 40°-60°inclination angle of the material bell,30°-60°angle of the dividing plate,and beam direction,the maximum reduction in material height difference is 70.8%,and the maximum reduction in standard deviation is 49.4%,especially at larger angles,the effect is significant,which helps the gas flow uniformly in the packed bed.

关 键 词：分立元件建模 干熄焦 填充床 料面形状 粒度分布 数值模拟 

分 类 号：TQ520.5[化学工程—煤化学工程]