立式固定管板式换热器泄漏原因分析与改进建议  

Analysis on Causes of Leakage of Vertical Fixed Tubesheet HeatExchanger and Suggestions for Improvement

作　　者：车垚 潘丰强 左小来 Che Yao;Pan Fengqiang;Zuo Xiaolai(College of Chemistry and Chemical Engineering,Ningxia University,Yinchuan,Ningxia 750021;PetroChina Lanzhou Petrochemical Company,Lanzhou,Gansu 730060)

机构地区：[1]宁夏大学化学化工学院,宁夏银川750021 [2]中国石油天然气股份有限公司兰州石化分公司,甘肃兰州730060

出　　处：《石油化工技术与经济》2025年第1期37-40,共4页Technology & Economics in Petrochemicals

摘　　要：文章探讨了在乙烯生产过程中,第二急冷换热器(SQE)的重要性及其泄漏问题。SQE作为关键设备,通过回收裂解气的热量生成超高压蒸汽,不仅提高了能量利用率,还降低了操作风险。导致SQE泄漏的主要因素包括材料疲劳、内部沉积、设计缺陷及操作不当等,尤其是采用刚性厚管板设计的SQE容易出现焊缝脆化、热应力集中及局部高温现象,从而增加泄漏风险。针对这些问题,提出了采用挠性管板设计、对接焊缝、建立高效的气体排放系统、定期进行设备维护等改进建议,可以有效减少焊缝应力、改善焊接质量,防止局部高温和泄漏现象的发生。The critical role and leakage challenges of the secondary quenching heat exchanger(SQE)in the ethylene production process were discussed.As a key piece of equipment,the SQE captures heat from cracked gases to generate ultra-high-pressure steam,enhancing energy efficiency and reducing operational risk.The primary causes of SQE leakage include material fatigue,internal deposits,design flaws,and improper operation.Notably,the rigid thick tube sheet design in some SQE systems can lead to weld embrittlement,thermal stress concentration,and localized overheating,all of which heighten the risk of leaks.To address these issues,several suggestions were proposed for improvement:adopting flexible tube sheet designs,butt welds,establishing efficient gas discharge system,and regular equipment maintenance,aiming to effectively reduce weld stress,improve weld quality,and prevent localized overheating and leakage incidents.

关 键 词：乙烯 第二急冷换热器 泄漏 挠性管板 

分 类 号：TH17[机械工程—机械制造及自动化]