摘要
乙烯是石油化工重要的基础原料,在裂解生产过程中伴随有CO的生成。裂解气中CO含量超标会使碳二加氢催化剂中毒,出现漏炔现象,造成乙烯产品不合格,更甚者导致装置联锁停车,影响乙烯的正常生产。文中论述了蒸汽裂解装置CO的生成过程,根据装置实际生产工况系统性分析了裂解气中CO含量超标的原因,其最主要原因为裂解炉炉管出口温度(COT)超温、裂解原料硫含量减少和投料前炉管注硫钝化不完全。同时根据CO超标的原因提出了相应的处置措施。
Ethylene is an important basic raw material for petrochemical industry,and CO will be generated during ethylene cracking.Excessive CO in cracking gas will lead to the poisoning of C 2 hydrogenation catalyst and the leakage of acetylene,resulting in unqualified ethylene products or even the interlock shutdown of the plant and affecting normal ethylene production.This paper discusses the generation process of CO in steam cracking unit,and systematically analyzes the causes of the excessive CO in cracking gas according to the actual production conditions of the plant.The main reasons for the excessive CO in cracking gas are the over high COT in cracking furnace,the reduced sulfur content of cracking raw material and the incomplete passivation of furnace tube before feeding.Some corresponding countermeasures are proposed according to the reasons for the excessive CO.
作者
刘驰
武传朋
谭伟洪
郑文兢
苟成冬
Liu Chi;Wu Chuanpeng;Tan Weihong;Zheng Wenjing;Gou Chengdong(ZhongKe(Guangdong)Refinery&Petrochemical Company Limited,Zhanjiang,Guangdong,P.C.524000;SINOPEC Research Institute of Safety Engineering Co.,Ltd.,Qingdao,Shandong,P.C.266100)
出处
《乙烯工业》
CAS
2023年第2期29-32,36,I0001,共6页
Ethylene Industry
关键词
乙烯裂解
CO超标
炉管出口温度
硫含量
ethylene cracking
excessive CO
coil outlet temperature/COT
sulfur content