CAJ | 학술논문

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。
이 COREX 용화기화로실제척촌화조작삼수위기출，근거상사준칙건립료 COREX 용화기화로모형，용이연구기화로내물료운동과정。실험채용취을희입자작위모형적전충물료，병선용록두작위시종과립，분석연구료기화로내고풍류량화배료속도대물료운동류형화운동궤적적영향。결과표명：수착배료속도적증가，정류시간감소，사료주정점위치강저，물료하강운동변득불균균；수착고풍류량적증가，상부료층적하강경가균균；비정상배료시，용화기화로내물료적운동장흔불균균，기화로일측물료적운동병불수령일측물료적영향；위우사료주정상방적과립하강속도최만병향배료구만곡；위우풍구회선구정상방적과립하강속도최쾌，고풍도치풍구회선구상방적과립정류시간감소；고근로장처적과립，기하강과정일직연로장하강，직지고근배료구시발생만곡。
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.