天然气再生塔底重沸器腐蚀与防护技术研究

doi:10.11902/1005.4537.2021.224

中国腐蚀与防护学报

2022, Vol. 42

Issue (4): 699-704 DOI: 10.11902/1005.4537.2021.224

研究报告

本期目录 | 过刊浏览

天然气再生塔底重沸器腐蚀与防护技术研究

高秋英¹^,²(

), 徐亦璇³, 胡鹏伟¹, 姚田万¹, 齐文龙⁴

^1.中国石油化工股份有限公司西北油田分公司乌鲁木齐 830011
^2.中国石油化工集团公司碳酸盐岩缝洞型油藏提高采收率重点实验室乌鲁木齐 830011
^3.俄罗斯国立石油天然气大学古勃金 119991
^4.东北大学沈阳材料科学国家实验室沈阳 110819

Corrosion and Protection Technique of Regeneration Tower Bottom Reboiler in Natural Gas Purification Unit

GAO Qiuying¹^,²(

), XU Yixuan³, HU Pengwei¹, YAO Tianwan¹, QI Wenlong⁴

^1.SINOPEC Northwest Company of China Petroleum and Chemical Corporation, Urumqi 830011, China
^2.Key Laboratory of Enhanced Oil Recovery in Carbonate Fractured-vuggy Reservoirs, CNPC, Urumqi 830011, China
^3.Russian National University of Petroleum and Natural Gas, Gubkin 119991, Russia
^4.Shenyang National Laboratory for Materials Science, Northeastern University, Shenyang 110819, China

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摘要:

针对某油田轻烃站再生塔底重沸器管束及管板的严重刺漏问题,通过现场服役工况、生产工艺相关信息的调研分析,并结合电化学评价方法,剖析并明确重沸器内腐蚀问题的诱因、机制及影响因素；同时,提出了切实可行的应对措施,最大程度地确保设备平稳、长期安全运行。

关键词 ：塔底重沸器, 脱硫脱碳, 腐蚀机制, 防护措施

Abstract：

Regeneration tower bottom reboiler is the key equipment for the desulfurization and decarbonization process of sour natural gas purification unit. With the incearsing tendency in processing raw gases of inferior quality, the corrosion of the reboiler and relevant parts is becoming more serious, which not only affects the normal operation of natural gas purification plant, but also has a great safety hidden danger. In this paper, aiming at the serious leakage of tube bundles and plates of regeneration tower bottom reboiler in natural gas purification unit, the inducement mechanism and influencing factors of corrosion in reboiler were clarified through comprehensive investigation of field service conditions and information about the production process, and assissted with proper electrochemical assessment. Moreover, the feasible countermeasures were put forward to ensure long-term safe operation of the equipment to the greatest extent.

Key words： reboiler desulfurization and decarburization corrosion mechanism protection measure

收稿日期: 2021-09-01

ZTFLH:

TG174

基金资助:国家重大科技专项(2016ZX05053);中国石化重点项目课题(319016-5)

通讯作者: 高秋英 E-mail: gaoqy.xbsj@sinopec.com

Corresponding author: GAO Qiuying E-mail: gaoqy.xbsj@sinopec.com

作者简介: 高秋英,女,1980年生,教授级高级工程师

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引用本文:

高秋英, 徐亦璇, 胡鹏伟, 姚田万, 齐文龙. 天然气再生塔底重沸器腐蚀与防护技术研究[J]. 中国腐蚀与防护学报, 2022, 42(4): 699-704.
Qiuying GAO, Yixuan XU, Pengwei HU, Tianwan YAO, Wenlong QI. Corrosion and Protection Technique of Regeneration Tower Bottom Reboiler in Natural Gas Purification Unit. Journal of Chinese Society for Corrosion and protection, 2022, 42(4): 699-704.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2021.224 或 https://www.jcscp.org/CN/Y2022/V42/I4/699

图1 不同温度范围重沸器材料在100~190 ℃的MDEA胺液中的电化学极化曲线

图2 几种材料在模拟重沸器腐蚀环境中腐蚀电位和腐蚀电流密度随温度的变化趋势

图3 不同温度下材料在模拟重沸器内腐蚀环境的浸泡10 d的腐蚀SEM形貌

图4 用于重沸器管束管板位置腐蚀问题的牺牲阳极阴极保护法示意图

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