摘要
针对某8.0 Mt a炼油厂因固定床渣油加氢装置停工导致其清洁汽油生产成本显著增加的问题,以及炼油厂检修周期为4年的实际情况,探讨了影响渣油加氢装置运行时间的主要因素、原料残炭与装置运行时间的关系、催化剂级配方案对催化剂加氢活性稳定性的影响,并提出了优化装置运行时间的措施。影响固定床渣油加氢装置运行时间的主要因素为原料性质和催化剂级配方案;渣油加氢装置原料残炭越高,即原料中减压渣油的比例越高,则装置运行时间越短;催化剂级配方案对催化剂加氢活性稳定性的影响很大,优化级配方案需兼顾级配催化剂的容金属能力和活性稳定性。确定固定床渣油加氢装置最优运行时间为2年,延长渣油加氢装置运行时间的措施主要有:原料中减压渣油的质量分数保持在50%左右;掺入约10%的催化裂化柴油或催化裂化轻循环油;进行低反应温度和高氢分压操作;优选催化剂专利商,开展新型高效催化剂及其级配方案研发工作。
Because of the shutdown of the fixed-bed residue hydrotreating unit in an 8.0 Mt a refinery,the cost of clean gasoline production increased remarkably.Based on the four-year turnaround cycle of the refinery,analyzing the main factors influencing the running time of fixed-bed unit,the relationship between the operating periond and Conradson carbon residue(CCR)of feedstocks,the catalyst grading scheme and the activity stability.Furthermore,the optimal methods were suggested.The main factors influencing the operating period of fixed-bed unit are feedstock properties and catalyst grading scheme.From the overall trend,the higher CCR in the feedstocks,the shorter the operating time of the unit,indicating that the higher the proportion of vacuum residue,the shorter the operating cycle.The catalyst grading scheme affects the hydrotreating activity stability of grading catalysts.The optimal of catalyst grading scheme must balance the ability of contain metals and the hydrotreating activity stability of grading catalysts.To achieving a 2-year operating period of fixed-bed residue hydrotreating unit,the optimal following measures are proposed,i.e.maintaining the proportion of vacuum residue about 50%in its feedstocks,adding an appropriate amount of FCC light cycle oil to the feedstocks,operating at lower reaction temperature and higher hydrogen partial pressure.In addition,refining enterprises should select a suitable catalyst licensor,and licensors should also continue to carry out research and development of catalysts and their grading technologies.
作者
邵志才
邓中活
刘涛
戴立顺
Shao Zhicai;Deng Zhonghuo;Liu Tao;Dai Lishun(SINOPEC Research Institute of Petroleum Processing Co.,Ltd.,Beijing 100083)
出处
《石油炼制与化工》
北大核心
2025年第2期40-45,共6页
Petroleum Processing and Petrochemicals
关键词
固定床
渣油加氢
运行时间
优化
fixed-bed
residue hydrotreating
cycle-length
optimization
作者简介
通讯联系人:邵志才,研究员,主要从事加氢工艺的研究工作,E-mail:shaozc.ripp@sinopec.com。
