| 催化裂化装置烟气轮机积垢及其增厚机理 |
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| 引用本文： | 费达,侯峰,陈辉,吴晓磊.催化裂化装置烟气轮机积垢及其增厚机理[J].化工学报,2015,66(1):79-85. |
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| 作者姓名： | 费达 侯峰 陈辉 吴晓磊 |
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| 作者单位： | 1.华东理工大学化学工程联合国家重点实验室, 上海 200237;2.中国石油化工股份有限公司, 北京 100728 |
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| 基金项目： | 中国石油化工股份有限公司科技开发项目(312016)。 |
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| 摘 要： | 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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| 关 键 词： | 催化裂化 烟气轮机 黏附 结垢 CFD |
| 收稿时间： | 2014-07-01 |
| 修稿时间： | 2014-10-15 |
Analysis of mechanism of fouling increase on blades of FCCU power recovery expander |
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| FEI Da,HOU Feng,CHEN Hui,WU Xiaolei.Analysis of mechanism of fouling increase on blades of FCCU power recovery expander[J].Journal of Chemical Industry and Engineering(China),2015,66(1):79-85. |
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| Authors: | FEI Da HOU Feng CHEN Hui WU Xiaolei |
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| Affiliation: | 1.State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;2.China Petroleum & Chemical Corporation, Beijing 100728, China |
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| Abstract: | Addressing the problem of serious fouling on the blades of FCCU (fluid catalytic cracking unit) power recovery expanders in refinery, micro-morphologies of fouling and catalyst particle at inlet of power recovery expander were analyzed with scanning electron microscopy (SEM). The fouling on the blades consisted of catalyst particle with diameter mainly between 1 μm and 2 μm. Then the adhesion mechanism of the catalyst particle and the effect of various adhesive forces on the adhesion phenomenon were studied. The smaller the diameter of the particle, the easier the particle was adhered, which agreed with the result of SEM. The inner distribution of the velocity field simulated by CFD demonstrated the effect of adhesive force on the fouling. |
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| Keywords: | FCCU power recovery expander adhesion fouling CFD |
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