摘要：通过对炼油厂催化裂化装置取样催化剂的浓度、粒度与形貌分析,催化裂化烟气轮机垢样的元素组成分析以及实验室内的高温静态烧结实验,研究在烟气轮机运行工况下催化剂结垢的原因及影响因素。结果表明:进入催化裂化烟气轮机中的催化剂主要是粒径小于10μm的小颗粒,并且形状极不规则,容易沉积并粘附在烟气轮机内的过流部件上;相对于催化裂化补充的新催化剂,进入催化裂化烟气轮机中的催化剂有Na、Ca、Fe、Ni这4种金属元素,并且含量均明显增大;在高温电炉中的静态烧结实验进一步验证了Na、Ca、Fe、Ni这4种金属元素对催化剂结垢具备促进作用。

关键词：结垢；催化剂；催化裂化烟气轮机

Abstract：Based on concentration,particle size and morphology analysis of catalyst samples from fluid catalytic cracking(FCC) unit of oil refinery,FCC flue gas turbine scale sample elemental composition analysis and high-temperature static sintering laboratory experiments,causes and influencing factors of catalyst scaling in gas turbine operating conditions were researched. The results show that the size of particles entered into the flue gas turbine is mainly less than 10 μm,and the shape of these particles is irregular which leads to easily deposited and adhered to the surface of flow passage component. Comparing with the FCC fresh catalyst,there are four kinds of metal elements which are Na,Ca,Fe,and Ni in the catalyst that entered into the flue gas turbine,and their contents significantly increase. The static sintering experiment in the high-temperature sintering furnace further validates the promoting effect of the four kinds of metal elements on catalyst scaling.

Keywords: scaling；catalyst；fluid catalytic cracking flue gas turbine