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丙烯酸装置再沸器封头接管腐蚀泄漏原因分析
Cause analysis of corrosion leakage of reboiler head nozzle of acrylic acid plant
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- DOI:
- 作者:
- 梁宗忠1 ，张 峰1 ，吴艳萍2 ，刘鹏举1
Liang Zongzhong 1 ，Zhang Feng 1 ，Wu Yanping 2 ，Liu Pengju 1
- 作者单位:
- 1.中国石油兰州石化分公司，甘肃 兰州 730060；2.圣莱科特精细化工（上海）有限公司，上海 201500
1. PetroChina Lanzhou Petrochemical Company，Lanzhou 730060，China；2. SI Group（Shanghai），Shanghai 201500，China
- 关键词:
- 丙烯酸；再沸器；接管；腐蚀；泄漏
acrylic acid；reboiler；nozzle；corrosion；leakage
- 摘要:
- 摘要：再沸器是影响丙烯酸装置平稳运行的关键设备，丙烯酸丁酯单元反应系统中的丙烯酸、对甲苯磺酸等工艺介质对金属具有强烈的腐蚀作用，正确选材是保证设备长周期的必然要求。文中介绍了某石化公司丙烯酸装置丁酯单元反应器再沸器上下封头接管的泄漏情况，通过宏观检查、厚度检测、光谱定量分析等方法，分析出不符合设计材质要求的接管被错误的使用于该强腐蚀场合是导致设备泄漏的主要原因。根据分析结果，装置及时更换了符合设计材质要求的再沸器上下封头接管，系统投用后跟踪检测运行良好，为同行业设备管理及腐蚀管控提供了经验，具有较强的借鉴意义。Abstract: Reboiler is the key equipment that affects the smooth operation of acrylic acid plant. The process media such as acrylicacid and p-toluene sulfonic acid in butyl acrylate unit reaction system have strong corrosion effect on metals, socorrect selection ofmaterials is an inevitable requirement to ensure the long-lead operation of equipment. This paper introduced the leakage of theupper and lower nozzle of the reboiler of butyl acrylate unit reactor in a petrochemical company, analyzed the main reason for theleakage of the equipment through macroscopic inspection, thickness detection and quantitative spectral analysis, i.e. the nozzle withunsatisfied with the design material requirements was wrongly used in the strong corrosion situation. According to the analysisresults, the satisfied material of the upper and lower head nozzle of the reboiler was timely replaced and then the tracking andtesting operation of the system was good, which provided experience for equipment management and corrosion control in the sameindustry and hadhigh reference significance.