浅谈常减压装置常顶回流工艺及腐蚀控制

doi:10.3969/j.issn.1006-8805.2022.02.010

Petro-chemical Equipment Technology ›› 2022, Vol. 43 ›› Issue (2): 48-51.doi: 10.3969/j.issn.1006-8805.2022.02.010

• CORROSION AND PROTECTION • Previous Articles

Reflux Process and Corrosion Control at the Top of Atmospheric Tower of Atmospheric and Vacuum Equipment

Zhang Haining

Equipment Research Institute of SINOPEC Tianjin Company, Tianjin, 300271

Received:2021-10-24 Accepted:2022-02-28 Online:2022-03-15 Published:2022-03-15

Abstract

Abstract: In order to solve the corrosion problem of the atmospheric pressure tower top and the corrosion problem of the top circulation system of the atmospheric and vacuum unit of a factory, the atmospheric pressure tower top was changed from a cold reflux process to a hot reflux process. After the revamp, the corroded parts have shifted significantly. Among them, the pressure pipeline behind the atmospheric tower top heat exchanger has severely corroded and thinned, and the air-cooled tube bundle has corroded and leaked, which affected the long-term stable operation of the device seriously. This paper analyzes the corrosion phenomena that occur under the constant-top cold reflux process and the constant-top hot reflux process respectively. Then it discusses the advantages and disadvantages of the two reflux processes based on the actual situation and proposes corrosion control recommendations.

Key words: atmospheric and vacuum distillation unit, cold reflux, heat reflux, corrosion

Zhang Haining. Reflux Process and Corrosion Control at the Top of Atmospheric Tower of Atmospheric and Vacuum Equipment[J].Petro-chemical Equipment Technology, 2022, 43(2): 48-51.

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Reflux Process and Corrosion Control at the Top of Atmospheric Tower of Atmospheric and Vacuum Equipment

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