催化裂化反应是在酸催化剂表面上烃大分子断裂生成较小烃分子的反应,同时存在单环芳烃可缩合成稠环芳烃,最后缩合成焦炭,造成催化剂表面结碳,引起催化剂很快失活,因此催化剂的再生一直是催化裂化催化剂的重要环节。本文主要探讨催化裂化装置三机组运行安全控制与实践。 The catalytic cracking reaction is the reaction of hydrocarbon macromolecules breaking into smaller hydrocarbon molecules on the surface of the acid catalyst. Simultaneously, the monocyclic aromatic hydrocarbons can be condensed into condensed aromatic hydrocarbons and finally condense into coke, resulting in the carbon surface of the catalyst, causing the catalyst to deactivate rapidly , So the catalyst regeneration has been an important part of the catalytic cracking catalyst. This paper mainly discusses the safety control and practice of three-unit operation of catalytic cracking unit.