乙烯装置稀释蒸汽发生器管束泄漏原因分析及对策

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Ethylene Industry ›› 2022, Vol. 34 ›› Issue (3): 58-61.

• EQUIPMENT MAINTENANCE • Previous Articles Next Articles

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

Abstract

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

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

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