沥青质对蜡油加氢处理装置运行影响分析  

Analysis of influence of asphaltene on operation of wax oil hydrotreating unit

作　　者：史卜建[1] 陈道宁 李云[1] 李治[1] 陈庆 孟栋梁 赵国栋[1] Shi Bujian;Chen Daoning;Li Yun;Li Zhi;Chen Qing;Meng Dongliang;Zhao Guodong(SINOPEC Qingdao Refining&Chemical Co.,Ltd.,Qingdao,Shandong 266500)

机构地区：[1]中国石化青岛炼油化工有限责任公司,山东省青岛市266500

出　　处：《炼油技术与工程》2024年第9期17-21,共5页Petroleum Refinery Engineering

摘　　要：某公司3.2 Mt/a蜡油加氢处理装置催化剂失活速率高达2.16℃/月。经分析发现,原料沥青质含量大幅上涨是导致该装置催化剂快速失活的主要原因。根据沥青质分子模型和催化剂失活原理,对比分析了原料中沥青质质量分数分别在200、500、2800μg/g工况以及氢分压分别在9.0、11.0 MPa下的催化剂失活速率,提出了延长装置运转周期的措施。根据催化剂失活原理,提出对氢分压在中压范围(小于10.5 MPa)的蜡油加氢处理装置,原料沥青质质量分数控制在小于500μg/g,装置运转周期可达到4 a。原料沥青质质量分数降低到300μg/g以下且匹配合适的催化剂级配方案,可达到催化剂表面积炭稳态平衡,实现装置超长周期运行。The catalyst deactivation rate of a 3.2 MM TPY wax oil hydrotreating unit in a certain company is as high as 2.16℃/month.After analysis,it is found that the significant increase of asphaltene content in feedstock is the main reason for the rapid deactivation of the catalyst in the unit.Based on the molecular model of asphaltene and the principle of catalyst deactivation,a comparative analysis is conducted on the catalyst deactivation rates when the asphaltene mass fraction in feedstock is at 200,500,2,800μg/g,and the hydrogen partial pressure is at 9.0 MPa and 11.0 MPa,respectively.Measures to extend the operating cycle of the unit are proposed.For the wax oil hydrotreating unit with a hydrogen partial pressure less than 10.5 MPa,the mass fraction of asphaltene in feedstock should be controlled at less than 500μg/g,and the operating cycle of the unit can reach 4 years.When the asphaltene mass fraction of feedstock is reduced to below 300μg/g and a suitable catalyst grading scheme is matched,the carbon deposition on catalyst surface can reach steady-state equilibrium,achieving ultra-long cycle operation of the unit.

关 键 词：沥青质 蜡油加氢 长周期运行 温度翘尾 

分 类 号：TE96[石油与天然气工程—石油机械设备]