裂解装置一级急冷水冷却器腐蚀分析
Corrosion Analysis of a Primary Quench Water Cooler in a Cracking Unit
张宇翔 1赵贵炎 1段志宏2
作者信息
- 1. 中国石油化工股份有限公司茂名分公司,广东 茂名 525000
- 2. 广东石油化工学院,广东 茂名 525000
- 折叠
摘要
某石化企业的裂解装置一级急冷水冷却器在运行过程中发生了腐蚀失效,为了确定其失效原因,对其进行了宏观观察,并对换热管取样进行硬度试验、化学成分分析、金相实验、扫描电镜观察、水质分析以及流速分析等表征手段.结果表明:该裂解装置的循环水流速过低,同时存在杂质和浊度偏高,导致了换热管内壁上结垢,从而形成垢下腐蚀.为解决此问题,应采取措施加大循环水的流速,同时加强循环水的处理,降低水质指标,减少杂质和浊度.
Abstract
During the operational process,the primary quench water cooler of a petrochemical cracking unit experienced corrosion failure.To determine the root cause of this failure,a comprehensive investigation was conducted.Macroscopic observations and characterization methods,including hardness testing,chemical composition analysis,metallographic experiments,scanning electron microscopy observations,water quality analysis,and flow velocity analysis,were applied to sampled heat exchange tubes.The findings reveal that the cracking unit's circulating water flow rate was excessively low,coupled with the presence of impurities and elevated turbidity.This condition led to scale formation on the inner walls of the heat exchange tubes and subsequent subscale corrosion.To address this issue,measures are recommended to increase the circulation water flow rate and enhance water treatment,thereby reducing water quality indicators and minimizing impurities and turbidity.
关键词
裂解装置/失效分析/急冷水冷却器/垢下腐蚀Key words
cracking unit/failure analysis/quench water cooler/under-deposit corrosion引用本文复制引用
出版年
2024
NETL
NSTL
万方数据