乙烯工业 ›› 2024, Vol. 36 ›› Issue (3): 20-24.

• 工业技术 • 上一篇    下一篇

裂解碳八馏分抽提苯乙烯装置腐蚀问题分析

刘  培   

  1. 中国石化工程建设有限公司,北京,100101
  • 收稿日期:2024-06-14 出版日期:2024-09-25 发布日期:2024-09-29
  • 作者简介:刘培,男,2015年毕业于中国石油大学(华东)化学工程与工艺专业,现从事工艺流程设计工作,工程师。

Analysis of Corrosion in Units for Extracting Styrene from Cracked C8 Fractions

Liu Pei   

  1. SINOPEC Engineering Incorporation, Beijing, P.C.100101
  • Received:2024-06-14 Online:2024-09-25 Published:2024-09-29

摘要:

裂解碳八馏分抽提苯乙烯装置中,脱色单元是承上启下的重要环节,抽提单元采出的粗苯乙烯经酸洗碱洗及水洗后,其色度指标方可达到国标要求。但强酸和强碱的腐蚀性对于管道和设备提出了苛刻的要求。文中介绍了裂解碳八馏分抽提苯乙烯的流程,对脱色系统作了简述,并就装置中管道和设备腐蚀原因进行了分析,提出了相应的防腐措施,以避免再次出现类似酸碱腐蚀。

关键词: 碳八馏分  , 抽提苯乙烯  , 酸腐蚀  , 原因分析

Abstract:

In the unit for extracting styrene from cracked C8 fractions, the decolorization system is very important. After acid washing, alkali washing and water washing, the color index of crude styrene extracted can meet the requirements of relevant national standards. However, strong acids and strong alkalis are highly corrosive to pipelines and equipment due to their strong corrosivity. This article introduces the process flow of extracting styrene from cracked C8 fractions, briefly discusses the process of styrene decolorization system, analyzes the causes of pipeline and equipment corrosion in the unit, and proposes some corresponding anti-corrosion measures to avoid similar acid and alkali corrosion in the future.

Key words: C8 fraction, extraction of styrene, acid corrosion, cause analysis