COREX熔化气化炉物料运动行为  

Solid flow behavior in COREX melter gasifier

作　　者：韩立浩[1,2] 罗志国[2] 邹宗树[2] 张玉柱[2,3] 

机构地区：[1]河北工业职业技术学院材料T程系,河北石家序050091 [2]东北大学材料与冶金学院,辽宁沈阳110819 [3]华北理工大学冶金与能源学院,河北唐山063009

出　　处：《钢铁研究学报》2015年第11期26-32,共7页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(51174037)

摘　　要：基于离散元方法，建立了二维扁平熔化气化炉的离散元模型，应用此模型从颗粒尺度对物料运动流型、速度场以及空隙度分布进行了研究。结果表明：采用加入示踪颗粒的方法，对颗粒运动流型进行分析，示踪颗粒层逐渐由直线型变为两侧向下弯曲型；从物料速度场分布可以看出，炉内存在死料柱区、活塞流区以及管道流区等运动区域。回旋区对炉内竖直方向速度分布的影响限于距炉缸底部上方0．18m处，回旋区半径的减小导致炉内颗粒活跃区域缩小，死料柱区高度增加；炉内物料运动存在一定的偏析现象，该现象也可从空隙度分布看出。炉内死料柱区空隙度为0．37左右，回旋区处为0．65左有，位于自由空间下方和死料柱区以及回旋区之间的活塞流区空隙度在O．37～0．65之间。Based on the discrete element method, a 2D slot model of COREX melter gasifier has been established. The solid flow pattern, velocity field and voidage distribution were analyzed by using the proposed model at a particle level. The results show that the solid flow pattern changes from linear mode to curving down on the both sides by means of joining tracer particles. Judging from the velocity field distribution, the solid flow can be divided into several different flow zones including dead zone, the plug flow zone and the channel flow zone. The influence of raceway in the vertical direction is fimited to the region of 0. 18m from the hearth bottom level. The decrease of raceway size causes that the region of faster particles becomes small and the height of dead zone increases remark ably. The velocity distribution is asymmetric in the furnace which shows that there exits segregation phenomenon, and the voidage distribution also clarifies this phenomenon. The voidage is 0.37 in the dead zone, while in the raceway the voidage is aboul 0. 65, and the voidage in the plug flow is between 0. 37 and 0. 65.

关 键 词：COREX熔化气化炉 离散元法 空隙度 运动流型 示踪颗粒 

分 类 号：TF321[冶金工程—冶金机械及自动化]