石油学报(石油加工) ›› 2021, Vol. 37 ›› Issue (1): 139-147.doi: 10.3969/j.issn.1001-8719.2021.01.014

• 研究报告 • 上一篇    下一篇

加氢装置空冷器出口管道多元水-盐体系的冲刷腐蚀特性

金浩哲1,许恒晖1,刘骁飞1,偶国富2,黄爱斌3,王金玲4   

  1. 1. 浙江理工大学 流动腐蚀研究所,浙江 杭州 310018;
    2. 常州大学 机械工程学院,江苏 常州 213016; 3. 中国石化 镇海炼化分公司, 浙江 宁波 315207; 4. 中海石油 舟山石化有限公司, 浙江 舟山 316015
  • 收稿日期:2019-11-08 修回日期:2020-05-15 出版日期:2021-01-25 发布日期:2021-01-12
  • 通讯作者: 刘骁飞,男,计量,博士,从事过程设备多相流动过程及腐蚀机理研究,E-mail: liuxf@zstu.edu.cn E-mail:liuxf@zstu.edu.cn
  • 作者简介:第一作者:金浩哲,男,副教授,博士,从事石化设备系统流动腐蚀预测及安全保障技术研究
  • 基金资助:
    国家重点研发计划项目(2017YFF0210403)基金资助

Erosion and Corrosion Characteristics of Multi-Element Water and Salt System in Hydrogenation Air-Cooled Outlet Pipelines

JIN Haozhe1, XU Henghui1, LIU Xiaofei1, OU Guofu2, HUANG Aibin3, WANG Jinling4   

  1. 1. Institute of Flow Induced Corrosion, Zhejiang Sci-Tech University, Hangzhou 310018, China; 2. School of Mechanical Engineering, Changzhou University, Changzhou 213016, China; 3. Zhenhai Refining & Chemical Company, SINOPEC, Ningbo 315207, China; 4. Zhoushan Petrochemical LTD., CNOOC,Zhoushan 316015, China
  • Received:2019-11-08 Revised:2020-05-15 Online:2021-01-25 Published:2021-01-12

摘要: 基于工艺关联过程及流体仿真模拟,分析了某石化企业加氢反应产物空冷器(REAC)系统出口管道中多元腐蚀流分布规律,建立了包含铵盐结晶温度、NH4HS质量分数、最大壁面剪切应力、水相体积分数等参数的流动腐蚀表征预测体系,并通过测量腐蚀产物及腐蚀余量等来验证预测模型的准确性。结果表明:正常工况下,空冷器出口管道内无铵盐结晶风险,但存在冲蚀风险;水相中NH4HS的质量分数为1.56%,且腐蚀产物中存在S元素;冲蚀高风险区主要集中在空冷器出口管的三通主管轴线方向110~135 mm和水平管轴线方向60~70 mm处;该位置与实际腐蚀减薄严重区域基本吻合,预测精度约为91.67%。

关键词: 出口管道, 多元体系, 冲刷腐蚀, 表征预测

Abstract: Based on the process analysis and numerical simulation, the distribution of the multi-element corrosion flow was analyzed in the outlet pipelines of the hydrogenation reactor effluent air coolers (REAC) of a petrochemical enterprise. The flow characterizations of the prediction system including crystallization temperature of ammonium salt, NH4HS mass fraction, maximum wall shear stress and water phase fraction were established. The accuracy of the prediction model was checked by measuring corrosion products and corrosion allowance. The results indicate that there is no risk of ammonium salt crystallization in the outlet pipeline system under the normal working condition. However, there is a certain erosion risk in the outlet pipelines. The NH4HS mass fraction is 1.56% in water phase, and sulfur element exists in the corrosion product. The high flow-induced corrosion region where locates in the 110-135 mm in the main axis direction of the tee and 60-70 mm in the axis direction of the horizontal pipe is specified. The high-risk region predicted by hydrodynamics parameters is line with the corrosion thinning area, and the prediction accuracy of erosion-corrosion is 9167%.

Key words: outlet pipelines, multicomponent system, erosion and corrosion, numerical simulation, characterization prediction

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