宁欣,武锦涛

• 1:大连理工大学化工学院

摘要(Abstract)：

聚丙烯多区循环反应器中完成两种不同反应条件的聚合反应的关键在于形成稳定的气液阻隔区。为探究形成稳定气液阻隔区的反应条件,文中采用计算流体力学方法,建立了包含液相蒸发的多相流模型,基于正交实验法探究了多因素对下降段的流动与传热特性的影响。结果表明,喷液量和喷液速度对下降段温度分布有显著影响,对下降段阻隔效果有显著影响的因素为喷液量和布液层数。喷液量为2 kg·s~(-1)、喷液速度为0.1 m·s~(-1)、喷液方向为竖直向下、布液层数为4层时,下降段温度降低5℃,阻隔区域蒸气量达到最大,且流速接近于0,而过量喷射(3 kg·s~(-1))会因蒸发不完全破坏反应气氛,同时导致阻隔效率下降。研究结论为优化Spherizone反应器操作参数提供了理论依据。

关键词(KeyWords)： 多区循环反应器;传热;多相流;计算流体力学;气液阻隔区

Abstract:

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基金项目(Foundation):

作者(Author): 宁欣,武锦涛

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