乙二醇偶联装置脱重塔泄漏原因分析及技术改造
LEAKAGE ANALYSIS OF DE-HEAVY FRACTIONATOR IN GLYCOL COUPLING PLANT AND TECHNICAL REFORMATION
周玉泉1
作者信息
- 1. 中国石化海南炼油化工有限公司,海南儋州 578001
- 折叠
摘要
介绍脱重塔运行中的腐蚀泄漏问题及技术改造情况,原设计的塔壁部分为衬钛结构,在不锈钢与钛材连接处的银钎焊被硝酸腐蚀造成泄漏;该塔更新后改为全碳钢衬钛塔,在塔顶部区间内的衬钛材又因有机酸腐蚀和氢脆导致腐蚀和开裂.通过腐蚀挂片试验研究,确定了脱重塔最终的选材方案,对该塔进行了更新改造,彻底消除了该塔的腐蚀泄漏隐患.
Abstract
The corrosion leakage happened during the operation of de-heavy fractionator and the related technical reformation were described.The wall of the column was originally designed to have half liner made of titanium.The silver brazing at the joint of stainless steel and titanium material was corroded by nitric acid causing leakage.A revamping was made to use the total carbon steel column with titanium liner.However the titanium liner at the top of the column once again was corroded by organic acid and subject to hydrogen embrittlement leading to corrosion and crack.After coupon corrosion test,the material selection plan for the fractionator was finally determined.The reformation was carried on to eliminate the hidden trouble of corrosion leakage.
关键词
脱重塔/腐蚀/泄漏/挂片试验/更新改造Key words
de-heavy fractionator/corrosion/leakage/coupon test/revamping引用本文复制引用
出版年
2024
NETL
NSTL
万方数据