摘要
基于BK10物性方法和Peng-Robinson状态方程,构建了常压塔塔顶挥发性管线工艺仿真模型,分析了塔顶油水两相及腐蚀性介质的分布规律。在此基础上,通过实验比较分析了纯水相和油水两相中腐蚀性介质对常压塔塔顶材料的腐蚀特性,研究了不同油水比例和腐蚀性介质浓度对常压塔塔顶材料腐蚀速率和表面形貌的影响规律。结果表明:常压塔塔顶HCl露点腐蚀温度为99℃,主要位于第一层塔盘;根据实验后得到的纯水相和含油相中腐蚀速率数据,纯水相中露点腐蚀最严重,油相的存在会降低常压塔塔顶露点腐蚀速率,且随着流体中油相比例增加腐蚀速率降低更加明显;HCl浓度增大会导致腐蚀程度增加。
Based on the BK10 physical property method and Peng-Robinson equation of state,a simulation model of volatile piping process at the top of atmospheric tower is constructed,and the distribution laws of oil-water two-phase and corrosive media at the top of the tower are analyzed.On this basis,the corrosion characteristics of corrosive media in pure water phase and oil-water phase on the top material of atmospheric tower are compared and analyzed through experiments.The influence of different oil-water ratios and corrosive media concentrations on the corrosion rate and surface morphology of atmospheric tower top materials is studied.The results show that the dew point corrosion temperature of HCl at the top of the atmospheric tower is 99℃,mainly located in the first layer of the tower disc.After the experiment,corrosion rate data are obtained for the pure water phase and the oil containing phase,indicating that dew point corrosion occurs most severely in the pure water phase.The presence of the oil phase reduces the dew point corrosion rate at the top of the atmospheric tower,and the corrosion rate decreases more significantly with the increase of the oil phase ratio in the fluid.An increase in HCl concentration will lead to an increase in the degree of corrosion.
作者
符德晓
陈欣
于希水
张冰
戴毓硕
刘骁飞
金浩哲
偶国富
Fu Dexiao;Chen Xin;Yu Xishui;Zhang Bing;Dai Yushuo;Liu Xiaofei;Jin Haozhe;Ou Guofu(Institute of Intelligent Prevention and Control and Flow-Induced Corrosion,Changzhou University,Changzhou,Jiangsu 213164;Institute of Flow-Induced Corrosion,Zhejiang Sci-Tech University,Hangzhou,Zhejiang 310018;PetroChina Changqing Petrochemical Company,Xi’an,Shaanxi 710000)
出处
《炼油技术与工程》
CAS
2024年第12期61-64,共4页
Petroleum Refinery Engineering
基金
国家重点研发计划项目(2023YFC3010504)
中国石油-常州大学创新联合体资助项目(2021DQ06)。
关键词
常压塔塔顶系统
油水两相
露点腐蚀机理
露点温度
油水比例
水含量
HCl含量
腐蚀速率
atmospheric tower top system
oil-water two-phase
dew-point corrosion mechanism
dew-point temperature
oil-water ratio
water content
HCl content
corrosion rate
