CAJ | 학술논문

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。
침대근년래련유엄중출현적최화열화연기륜궤결구엄중문제，채용SEM（소묘전자현미경）대최화제평형제、연궤입구최화제과립화구양진행료미관형모적분석，결과표명，연궤협편상적결구주요시유1～2μm적최화제과립조성。대최화제점부재협편표면적궤리진행연구，분석점부력대점부작용적영향，결과표명，최화제과립립경월소，월용역피점부，여SEM적결과문합。통과CFD모의연궤류도내속도장적분포，험증료점부력대결구적영향。
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 1μm and 2μm. 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.