裂解气中CO超标原因分析及应对措施

乙烯工业 ›› 2023, Vol. 35 ›› Issue (2): 29-32.

裂解气中CO超标原因分析及应对措施

刘驰¹，武传朋²，谭伟洪¹，郑文兢¹，苟成冬²

1 中科（广东）炼化有限公司，广东湛江 524000；2 中石化安全工程研究院有限公司，山东青岛 266000

收稿日期:2022-09-09 修回日期:2023-02-14 出版日期:2023-06-25 发布日期:2023-07-11
作者简介:刘驰，男，2017年毕业于中国石油大学（华东）过程装备与控制工程专业，主要从事乙烯装置生产管理工作，助理工程师。

Cause Analysis and Countermeasures for Excessive CO in Cracking Gas

Liu Chi¹, Wu Chuanpeng², Tan Weihong¹, Zheng Wenjing¹, Gou Chengdong²

1. ZhongKe (Guangdong) Refinery & Petrochemical Company Limited, Zhanjiang, Guangdong, P.C.524000; 2. SINOPEC Research Institute of Safety Engineering Co., Ltd., Qingdao, Shandong, P.C.266100

Received:2022-09-09 Revised:2023-02-14 Online:2023-06-25 Published:2023-07-11

摘要/Abstract

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。

关键词: 乙烯裂解 CO超标 , 炉管出口温度 , 硫含量

Abstract:

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 C₂ 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.

Key words: ethylene cracking, excessive CO, coil outlet temperature/COT, sulfur content

刘驰, 武传朋, 谭伟洪, 郑文兢, 苟成冬. 裂解气中CO超标原因分析及应对措施[J]. 乙烯工业, 2023, 35(2): 29-32.

Liu Chi, Wu Chuanpeng, Tan Weihong, Zheng Wenjing, Gou Chengdong. Cause Analysis and Countermeasures for Excessive CO in Cracking Gas[J]. Ethylene Industry, 2023, 35(2): 29-32.