摘要
在固定床渣油加氢试验装置上研究了催化裂化柴油(催化柴油)、煤油和催化裂化油浆在线清洗对渣油加氢催化剂活性和反应器压降的影响。首先采用催化柴油对运转中期的渣油加氢试验装置进行72 h在线清洗,结果表明,清洗后再通入渣油时加氢渣油的密度、残炭、硫含量和金属含量都显著降低,金属含量可长时间保持在较低水平。通过大幅提高反应温度模拟后部反应器压降升高现象,再分别采用煤油和催化裂化油浆对装置进行在线清洗,结果表明,使用煤油清洗后再通入渣油时反应器压降会很快再次升高,而使用催化裂化油浆清洗后再通入渣油运行500 h后反应器压降未见上升,说明催化剂结焦导致反应器压降上升的问题可采用高芳香性催化裂化油浆间歇清洗的方式解决。
The effects of online cleaning on catalyst activity and reactor pressure drop by using catalytic cracking(FCC)light cycle oil(LCO),kerosene and FCC slurry was studied on a fixed-bed residue hydrotreating unit.Firstly,the residue hydrotreating unit in the middle stage of operation was cleaned online for 72 h by using LCO,the density,carbon residue value,sulfur mass fraction and metal content of the hydrotreated oil decreased significantly after cleaning,and the metal content could be kept at a low level for a long time.The pressure drop in fixed-bed reactor was simulated by raising the reaction temperature,and the unit was cleaned online by using kerosene and FCC slurry,respectively.When kerosene was used to clean the reactor,the pressure drop of the reactor would quickly rise again,while the pressure drop of the reactor did not rise after 500 h of operation by using FCC slurry.It was concluded that the increase of pressure drop caused by coking of catalyst could be solved by intermittent cleaning of high aromatic FCC slurry.
作者
刘圆元
聂鑫鹏
邓中活
涂银堂
Liu Yuanyuan;Nie Xinpeng;Deng Zhonghuo;Tu Yintang(PetroChina Sichuan Petrochemical Co.,Ltd.,Chengdu 611930;SINOPEC Research Institute of Petroleum Processing Co.,Ltd.)
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2023年第4期43-47,共5页
Petroleum Processing and Petrochemicals
关键词
渣油加氢
催化裂化柴油
油浆
在线清洗
反应器
压降
residue hydrotreating
catalytic cracking light cycle oil
slurry
online cleaning
reactor
pressure drop
