MIP重油催化与LTAG组合工艺运行情况分析
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摘要
MIP技术因其技术独特的双反应区控制技术,有多产异构烷烃降低汽油烯烃,或多产异构烷烃的清洁汽油同时根据需要可以增产丙烯两种生产模式,可根据市场需求对生产方案进行合理调整;LTAG技术主要利用加氢单元和催化单元组合,将催化装置的LCO馏分先加氢后再进行催化裂化,通过优化匹配加氢和催化裂化的工艺参数等,实现最大化生产高辛烷值汽油和/或C_6～C_8芳烃。MIP与LTAG双提升管组合模式灵活多效,改造后的MIP+LTAG双提升管贫氧再生装置,对比以前的FDFCC-Ⅲ双提升管装置,汽油辛烷值明显提高,汽油中的烯烃含量稍有降低,芳烃含量明显提高,经进一步处理后符合国Ⅵ汽油标准要求;多产汽油方案时汽油收率也有明显增加趋势,柴油十六烷值降低明显,柴油质量变差,装置总体油浆系统较改造前油浆密度增加,LTAG油浆产率低,单独的LTAG反应器对应的分馏塔需要有补充油浆才能保证系统运行,保证油浆系统固含量及密度。
MIP technology,because of its unique dual reaction zone control technology,has two production modes,i.e. producing more isoparaffins to reduce gasoline olefins or producing more isoparaffins while increasing propylene production as needed.The production plan can be reasonably adjusted according to market demand.LTAG technology mainly uses the combination of hydrogenation unit and catalytic cracking unit to first hydrogenate and then catalytically crack the LCO fractions in FCC unit,to maximize the production of high-octane gasoline and/or C_6-C_8 aromatics by optimizing the process parameters of hydrogenation and catalytic cracking.The combination mode of MIP and LTAG dual risers is flexible and multi-effective.Compared with the previous FDFCC-Ⅲ dual riser unit,the modified MIP+LTAG dual riser oxygen-poor regeneration unit remarkably improves the octane number of gasoline,slightly reduces the olefin content of gasoline and remarkably increases the aromatics content.After further treatment,the gasoline can meet the requirements of the National Ⅵ standard.When more gasoline is to be produced,the gasoline yield increases obviously,the cetane number of diesel oil decreases significantly,the diesel quality deteriorates,the density of slurry in the overall slurry system of the unit increases,and the LTAG slurry yield is low.The fractionation tower corresponding to the individual LTAG reactor needs to have slurry make-up to ensure the operation of the system and to ensure the solid content and density of the slurry system.
MIP technology,because of its unique dual reaction zone control technology,has two production modes,i.e. producing more isoparaffins to reduce gasoline olefins or producing more isoparaffins while increasing propylene production as needed.The production plan can be reasonably adjusted according to market demand.LTAG technology mainly uses the combination of hydrogenation unit and catalytic cracking unit to first hydrogenate and then catalytically crack the LCO fractions in FCC unit,to maximize the production of high-octane gasoline and/or C_6-C_8 aromatics by optimizing the process parameters of hydrogenation and catalytic cracking.The combination mode of MIP and LTAG dual risers is flexible and multi-effective.Compared with the previous FDFCC-Ⅲ dual riser unit,the modified MIP+LTAG dual riser oxygen-poor regeneration unit remarkably improves the octane number of gasoline,slightly reduces the olefin content of gasoline and remarkably increases the aromatics content.After further treatment,the gasoline can meet the requirements of the National Ⅵ standard.When more gasoline is to be produced,the gasoline yield increases obviously,the cetane number of diesel oil decreases significantly,the diesel quality deteriorates,the density of slurry in the overall slurry system of the unit increases,and the LTAG slurry yield is low.The fractionation tower corresponding to the individual LTAG reactor needs to have slurry make-up to ensure the operation of the system and to ensure the solid content and density of the slurry system.
引文
[1]马伯文.催化裂化装置技术问答[M].2版.北京:中国石化出版社,2003.
[2]施瑢,戴立顺,刘涛,等.MIP催化裂化柴油与渣油联合加氢工艺研究[J].石油炼制与化工,2017,48(2):6-11.
[3]高飞,王秀绘,崔俊峰,等.重油催化裂化提高汽油辛烷值的措施探讨[J].现代化工,2011,31(2):68-70.
[2]施瑢,戴立顺,刘涛,等.MIP催化裂化柴油与渣油联合加氢工艺研究[J].石油炼制与化工,2017,48(2):6-11.
[3]高飞,王秀绘,崔俊峰,等.重油催化裂化提高汽油辛烷值的措施探讨[J].现代化工,2011,31(2):68-70.