刘英杰,蓝兴英,刘旭阳,徐春明,高金森

• 1:中国石油大学重质油国家重点实验室
• 2:中海炼化惠州炼油分公司

摘要(Abstract)：

在双流体模型以及团聚修正曳力模型的基础上,采用停留时间分布(RTD)模型,对工业催化裂化装置汽提器内气体和催化剂的停留时间进行了模拟计算,得到了人字型挡板、盘环型挡板和两段环流汽提器内气固两相的RTD特征。三种结构汽提器中气体的RTD曲线都呈现很不平滑的多峰分布,而催化剂颗粒的RTD曲线则呈现平滑的单峰分布,气体及催化剂颗粒的RTD曲线都出现了拖尾现象。模拟结果表明,三种汽提器内气体及颗粒的流动明显偏离平推流,催化剂的返混程度比气体强。与人字型挡板相比,盘环型挡板改善了汽提器内气固接触效果,从而提高汽提效率;与人字型挡板和盘环型挡板相比,两段环流汽提器不但改善了气固接触效果,还延长了催化剂颗粒的停留时间,并且降低催化剂的返混程度,模拟结果解释了工业两段环流汽提器汽提效率最高的原因。

关键词(KeyWords)： 流化催化裂化;汽提器;停留时间分布;汽提效率;计算流体力学

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(20490202);; 国家杰出青年基金项目(20725620)

作者(Author): 刘英杰,蓝兴英,刘旭阳,徐春明,高金森

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