乙烯装置稀释蒸汽发生器管束泄漏原因分析及对策

乙烯工业 ›› 2022, Vol. 34 ›› Issue (3): 58-61.

乙烯装置稀释蒸汽发生器管束泄漏原因分析及对策

马彪，冷忠，谷阳，王明明，黄超，曹堂富

中国石油天然气股份有限公司独山子石化分公司，新疆独山子 833699

收稿日期:2021-05-11 修回日期:2021-09-07 出版日期:2022-09-25 发布日期:2022-09-20
作者简介:马彪，男，2008年毕业于中国石油大学（华东），学士，主要从事设备管理工作，高级工程师。

Cause Analysis and Countermeasures for Tube Bundle Leakage of Dilution Steam Generator in Ethylene Plant

Ma Biao, Leng Zhong, Gu Yang, Wang Mingming, Huang Chao, Cao Tangfu

PetroChina Dushanzi Petrochemical Company, Dushanzi, Xinjiang, P.C.833699

Received:2021-05-11 Revised:2021-09-07 Online:2022-09-25 Published:2022-09-20

摘要/Abstract

摘要：

某乙烯装置稀释蒸汽发生器2号再沸器为U型管换热器，自2019年11月换热器管束频繁发生泄漏。对泄漏换热管取样,通过宏观形貌检查、材质分析、电镜及能谱分析等方法，分析泄漏原因。结果表明：管束泄漏主要原因是工艺水蒸发造成局部碱浓缩产生碱腐蚀。另外，pH值控制不稳定形成酸性腐蚀。通过采取防护措施，减少了换热器泄漏频次。

关键词: 稀释蒸汽发生器 , 换热管 , 泄漏 , 腐蚀

Abstract:

The No.2 reboiler of dilution steam generator in an ethylene plant is a U-tube heat exchanger. Since November 2019, the tube bundle of heat exchanger has been leaking frequently. The leaked tube was sampled, and the leakage reasons were analyzed by means of macroscopic inspection, material analysis, electron microscope and energy spectrum analysis. The results show that the main cause of tube bundle leakage is the alkali corrosion caused by local alkali concentration due to the evaporation of process water. In addition, acid corrosion is formed when pH control is unstable. Various protective measures were taken to reduce the leakage frequency of heat exchanger.

Key words: dilution steam generator, heat exchange tube, leak, corrosion

马彪, 冷忠, 谷阳, 王明明, 黄超, 曹堂富. 乙烯装置稀释蒸汽发生器管束泄漏原因分析及对策[J]. 乙烯工业, 2022, 34(3): 58-61.

Ma Biao, Leng Zhong, Gu Yang, Wang Mingming, Huang Chao, Cao Tangfu. Cause Analysis and Countermeasures for Tube Bundle Leakage of Dilution Steam Generator in Ethylene Plant[J]. Ethylene Industry, 2022, 34(3): 58-61.

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