COREX熔化气化炉物料运动的物理模拟  

Physical simulation on burden movement in COREX melter gasifier

作　　者：韩立浩[1] 罗志国[1] 邹宗树[1] 张玉柱[1,2] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819 [2]华北理工大学冶金与能源学院,河北唐山063009

出　　处：《重庆大学学报（自然科学版）》2015年第2期11-16,共6页Journal of Chongqing University

基　　金：国家自然科学基金资助项目(51174037)~~

摘　　要：以COREX熔化气化炉实际尺寸和操作参数为基础,根据相似准则建立了COREX熔化气化炉模型,用以研究气化炉内物料运动过程。实验采用聚乙烯粒子作为模型的填充物料,并选用绿豆作为示踪颗粒,分析研究了气化炉内鼓风流量和排料速度对物料运动流型和运动轨迹的影响。结果表明:随着排料速度的增加,停留时间减小,死料柱顶点位置降低,物料下降运动变得不均匀;随着鼓风流量的增加,上部料层的下降更加均匀;非正常排料时,熔化气化炉内物料的运动将很不均匀,气化炉一侧物料的运动并不受另一侧物料的影响;位于死料柱正上方的颗粒下降速度最慢并向排料口弯曲;位于风口回旋区正上方的颗粒下降速度最快,鼓风导致风口回旋区上方的颗粒停留时间减小;靠近炉墙处的颗粒,其下降过程一直沿炉墙下降,直至靠近排料口时发生弯曲。Based on the actual size and operation parameters of COREX melter gasifier and the similarity theory, as caled COREX melter gasifier model is established to study the burden movement. The polyethylene particles and mung bean are used as the packed burden and traceparticles, respectively. The effects of blast volume and discharging rate on flow pattern and trajectory are studied in detail. The results reveal that with the increase of discharging rate, the residence time decreases, the top position of deadman reduces, and the descending of burden movement becomes uneven.With the increase of the blast volume, the upper burden descends more even. Under abnormally discharging condition, the burden movement in meltergasifier would become uneven, which would cause uneven gas distribution in the furnace. The flow behavior in one half of the model appears to be independent of the other half. Particles under deadman descending at the slowest velocity tend to bend to the outlet. Particles above the raceway descend at the fastest velocity, and the blast causes the residence time to be reduced.Particles being close to the furnace wall descend along the wall until they get close to the outlet and then bend.

关 键 词：COREX熔化气化炉 物料运动 流型 轨迹 物理模拟 

分 类 号：TF557[冶金工程—钢铁冶金]