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化工学报  2015 

催化裂化装置烟气轮机积垢及其增厚机理

DOI: 10.11949/j.issn.0438-1157.20140994, PP. 79-85

Keywords: 催化裂化,烟气轮机,黏附,结垢,CFD

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Abstract:

针对近年来炼油厂中出现的催化裂化烟气轮机结垢严重问题,采用SEM(扫描电子显微镜)对催化剂平衡剂、烟机入口催化剂颗粒和垢样进行了微观形貌的分析,结果表明,烟机叶片上的结垢主要是由1~2μm的催化剂颗粒组成。对催化剂黏附在叶片表面的机理进行研究,分析黏附力对黏附作用的影响,结果表明,催化剂颗粒粒径越小,越容易被黏附,与SEM的结果吻合。通过CFD模拟烟机流道内速度场的分布,验证了黏附力对结垢的影响。

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