摘要
浙江石油化工有限公司3.5 Mt·a^(-1)柴油加氢裂化装置(含0.9 Mt·a^(-1)轻烃回收),采用进口两段全转化加氢裂化技术,选用进口加氢精制和加氢裂化催化剂,最大量生产重石脑油作为连续重整装置进料。该装置开工后一直维持100%负荷稳定运行,标定综合能耗1725 MJ·t^(-1),较设计值低436.26 MJ·t^(-1);受冷氢阀开度大等运行瓶颈影响,转化率最大控制96.32%,低于设计3.21个百分点;重石脑油收率65.41%,不及预期。为增产PX,同时解决汽油和煤油出厂困难,该装置掺炼催化重汽油、直馏煤油及重芳烃等原料,同时停止加工浆态床重石脑油。在加工催化重汽油、直馏煤油和柴油原料的工况下,通过灵活调整操作参数,装置总转化率达到98.8%以上,化学氢耗3.39%(质量分数),重石脑油收率达到68.10%,芳构化指数增加1.74个百分点;相比设计工况掺炼浆态床重石脑油进料占比4.23%,原料优化后,装置实际重石脑油收率增加6.92个百分点,达到了全厂增产重石脑油的目标,满足PX达产的要求。
3.5 Mt·a^(-1) diesel hydrocracker(including 0.9 Mt·a^(-1) light hydrocarbon recovery)in Zhejiang Petrochemical Co.,Ltd.adopts imported two-stage full conversion hydrocracking technology,with imported hydrorefining and hydrocracking catalysts,and produces the maximum amount of heavy naphtha as feed to the continuous reformer.The unit has been running at 100% load since start-up,with a calibrated energy consumption of 1725 MJ·t^(-1) which was 436.26 MJ·t^(-1) lower than the design value;the conversion rate was 96.32%,which was 3.21 percentage points lower than the design value.Due to operating bottlenecks such as the large opening of the cold hydrogen valve,the maximum conversion rate was 96.32%,which was 3.21 percentage points lower than the design;the yield of heavy naphtha was 65.41%,which was less than expected value.In order to increase PX production and solve the difficulties of gasoline and kerosene selling,the plant blended catalytic heavy gasoline,straight-run kerosene and heavy aromatics,and stopped processing slurry bed heavy naphtha at the same time.Under the conditions of processing catalytic heavy gasoline,straight-run kerosene and diesel fuel,by flexibly adjusting the operating parameters,the total conversion rate of the plant reached 98.8%,the chemical hydrogen consumption was 3.39%(mass fraction),the heavy naphtha yield reached 68.10%,and the aromatization index increased by 1.74 percentage points;compared with the design conditions of blending slurry bed heavy naphtha feed with ratio of 4.23%,the actual heavy naphtha yield of the plant was increased by 6.5% after feedstock optimization.Compared with the design condition,the actual heavy naphtha yield of the plant increased by 6.92 percentage points after feedstock optimization,which achieved the target of increasing heavy naphtha production in the whole plant and met the requirement of PX production.
作者
高攀
GAO Pan(Zhejiang Petrochemical Co.,Ltd.,Zhoushan Zhejiang 316000,China)
出处
《当代化工》
CAS
2023年第5期1137-1141,1169,共6页
Contemporary Chemical Industry
关键词
两段全循环
汽煤柴加氢裂化
浆态床柴油
重石脑油
开工
优化
能耗
Two-stage full cycle process
Gasoline kerosene diesel hydrocracking
Diesel fuel for slurry bed reactor
Heavy naphtha
Start-up
Optimization
Energy consumption
