脱甲烷塔塔顶冷凝器甲烷出口线钢铝转换接头泄漏原因分析

乙烯工业 ›› 2025, Vol. 37 ›› Issue (4): 15-19.

脱甲烷塔塔顶冷凝器甲烷出口线钢铝转换接头泄漏原因分析

邢普瑜¹，吕倩²，袁帆¹，高飞¹

1 中国石油塔里木石化分公司，新疆库尔勒 841000；2 中国石油物资采购中心西北分中心，陕西西安 710000

收稿日期:2024-12-12 修回日期:2025-11-05 出版日期:2025-12-25 发布日期:2025-12-30
作者简介:邢普瑜，男，2013年毕业于中国石油大学（华东）机械设计及自动化专业，现从事静设备检修及特种设备管理工作，设备工程师。

Cause Analysis of Leakage at Steel-aluminum Transition Joint of Methane Outlet Line of Overhead Condenser in Demethanizer

Xing Puyu¹，Lyu Qian²，Yuan Fan¹，Gao Fei¹

1. China Petroleum Tarim Petrochemical Company, Korla, Xinjiang, P.C.841000; 2. Northwest Sub-center of China National Petroleum Corporation Procurement Center, Xi'an, Shaanxi, P.C.710000

Received:2024-12-12 Revised:2025-11-05 Online:2025-12-25 Published:2025-12-30

摘要/Abstract

摘要：

某石化公司裂解装置运行过程中，乙烯精馏塔塔顶甲烷含量持续上涨，经排查分析为脱甲烷塔冷凝器甲烷氢侧泄漏所致，更换新的钢铝接头后，甲烷含量逐渐下降满足生产要求。对运行状况进行分析及接头开裂处样品进行宏观检查、金相分析、硬度检测和扫描电镜观察，开裂主要原因是日常开停工期间冷凝器升降温速率控制不当、钢铝转换接头存在制造缺陷等。通过制定严格升降温速率操作方案，严格细化和优化工艺操作，优化相应设备的操作规程，达到装置长周期平稳运行的目标。

关键词: 脱甲烷塔冷凝器 , 钢铝接头 , 爆炸焊 , 泄漏 , 原因分析

Abstract:

During the operation of the ethylene cracking unit of a refining and chemical plant, the methane content at the top of the ethylene distillation column continuously increased. The investigation and analysis showed that it was caused by the leakage on the methane-hydrogen side of the condenser in demethanizer. After replacing the steel-aluminum transition joint with a new one, the methane content gradually decreased, meeting the production requirements. Through the operational analysis and the macro inspection, metallographic analysis, hardness testing and scanning electron microscope observations of the failed samples, it was found that the main reasons for the cracks include the improper control of the cooling and heating rates of cold box system during daily start-up and shutdown and the manufacturing defects in the steel-aluminum transition joint. By formulating strict operating procedures for cooling and heating rates, strictly refining and optimizing process operations, and optimizing the operating procedures for relevant equipment, the goal of long-term stable operation of the unit can be achieved.

Key words: demethanizer condenser, steel-aluminum joint, explosion welding, leakage, cause analysis')"> cause analysis

邢普瑜, 吕倩, 袁帆, 高飞. 脱甲烷塔塔顶冷凝器甲烷出口线钢铝转换接头泄漏原因分析[J]. 乙烯工业, 2025, 37(4): 15-19.

Xing Puyu, Lyu Qian, Yuan Fan, Gao Fei. Cause Analysis of Leakage at Steel-aluminum Transition Joint of Methane Outlet Line of Overhead Condenser in Demethanizer[J]. Ethylene Industry, 2025, 37(4): 15-19.

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