摘要
焦化蜡油中碱性氮化物、多环芳烃、胶质和沥青质等含量较高,不利于催化裂化反应的发生。某炼油厂将焦化蜡油糠醛精制后得到的抽余油代替焦化蜡油掺炼至催化裂化装置,结果发现:与焦化蜡油相比,经糠醛精制后,抽余油中碱性氮化物、硫、胶质、芳烃含量均大幅度降低,饱和烃含量增加;掺炼抽余油后,催化裂化装置的原料性质和产品分布得到明显改善;产品中液化气收率提高0.93百分点,汽油收率提高1.08百分点,总液体收率提高0.30百分点,焦炭、油浆、柴油产率降低;干气中氢气与甲烷体积比降低,表明催化裂化过程中氢利用率提高;液化气中丙烯含量略有升高;汽油辛烷值提高;烟气中NO_(x)和SO_(2)含量均下降;催化剂剂耗降低0.3 kg/t,每年可节约催化剂费用350万元。
Coker gas oil contains relatively high concentrations of basic nitrogen compounds,polycyclic aromatic hydrocarbons,resins,and asphaltenes,which are unfavorable for catalytic cracking reactions.A certain refinery substituted coker gas oil with the raffinate obtained after furfural refining of coker gas oil,and blended it into the feed of catalytic cracking unit.This substitution led to a significant improvement in the properties of the feedstock.After furfural refining,the raffinate exhibited substantial reductions in the contents of basic nitrogen compounds,sulfur,resins,and aromatics,along with an increase in the content of saturated hydrocarbons.Following the blending of the raffinate,the product distribution of the catalytic cracking unit showed marked improvements.The yield of liquefied petroleum gas increased by 0.93 percentage points,gasoline yield by 1.08 percentage points,and total liquid yield by 0.30 percentage points,while the yields of coke,slurry oil,and diesel decreased.The volume ratio of hydrogen to methane in the dry gas decreased,indicating enhanced hydrogen utilization efficiency during catalytic cracking.The propylene content in liquefied petroleum gas has slightly increased.The octane number of gasoline increased,and the contents of NO_(x) and SO_(2) in the flue gas both decreased.Catalyst consumption reduced by 0.3 kg/t,resulting in annual savings of 3.5 million Yuan in catalyst costs.
作者
李玉博
吴春元
陈晓梅
郗艳龙
熊逸
Li Yubo;Wu Chunyuan;Chen Xiaomei;Xi Yanlong;Xiong Yi(Panjin North Asphalt Fuel Co.,Ltd.,Panjin,Liaoning 124000;SINOPEC Catalyst Co.,Ltd.)
出处
《石油炼制与化工》
北大核心
2026年第1期44-48,共5页
Petroleum Processing and Petrochemicals
关键词
催化裂化
焦化蜡油
糠醛精制
抽余油
catalytic cracking
coker gas oil
furfural refining
raffinate
