SVQS和MSCS技术在重油催化裂化装置上的工业应用
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摘要
中国石油大庆石化分公司1.4Mt/a重油催化裂化装置存在沉降器结焦严重的问题,制约了装置长周期运转。对提升管出口油气分离系统和汽提段进行分析,得出沉降器结焦的主要原因为:反应器粗旋风分离器升气管开放式布置、没有预汽提设备等使油气在沉降器中停留时间过长,导致结焦;汽提段结构存在缺陷,未根据油气存在状况针对性地采用不同的汽提技术。采用中国石油大学(北京)开发的SVQS油气快速分离系统和MSCS高效组合汽提技术对装置进行改造,标定结果表明,与改造前相比,改造后轻质油收率增加3.46百分点,液体收率增加1.44百分点,焦炭产率降低1.43百分点,装置能耗降低41.5 MJ/t。
The serious coking in disengager in 1.4Mt/a RFCC unit of Daqing Branch of CNPC limited the long-term operation.The analysis on the post-riser system and the stripper of the unit indicated that the open-type structure of the exit-tube of primary cyclone separator without pre-stripping device led to a long residence time of oil and gas in the disengager and coking;the structure defects and single stripping technology of stripping section were the another important reason for the coking in disengager.The technologies of SVQS(oil and gas quick separation system)and MSCS(high efficiency stripping combination technology)developed by China University of Petroleum(Beijing)were employed to revamp the disengager.The results show that the light oil yield increases 3.46 percentage points,and the liquid yield increases 1.44 percentage points,while the coke yield decreases 1.43 percentage points,and the unit energy consumption reduces by 41.5 MJ/t.
The serious coking in disengager in 1.4Mt/a RFCC unit of Daqing Branch of CNPC limited the long-term operation.The analysis on the post-riser system and the stripper of the unit indicated that the open-type structure of the exit-tube of primary cyclone separator without pre-stripping device led to a long residence time of oil and gas in the disengager and coking;the structure defects and single stripping technology of stripping section were the another important reason for the coking in disengager.The technologies of SVQS(oil and gas quick separation system)and MSCS(high efficiency stripping combination technology)developed by China University of Petroleum(Beijing)were employed to revamp the disengager.The results show that the light oil yield increases 3.46 percentage points,and the liquid yield increases 1.44 percentage points,while the coke yield decreases 1.43 percentage points,and the unit energy consumption reduces by 41.5 MJ/t.
引文
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[3]胡艳华,卢春喜,时铭显.催化裂化提升管出口紧凑式旋流快分系统[J].石油学报(石油加工),2009,25(1):20-25
[4]李鹏,刘梦溪,韩守知,等.锥盘-环流组合式汽提器在扬子石化公司重油催化裂化装置上的应用[J].石化技术与应用,2009,27(1):32-35
[5]牛驰.重油催化裂化装置技术改造措施及效果[J].石油炼制与化工,2013,44(4):13-17
[6]刘梦溪,卢春喜,王祝安,等.组合式催化剂汽提器:中国,ZL200610088923[P].2006
[7]刘梦溪,卢春喜,时铭显.气固环流反应器的研究进展[J].化工学报,2013,64(1):116-123
[8]刘梦溪,牛占川,卢春喜,等.导流筒分布器位置对环隙气升式气固环流反应器流体力学性能的影响[J].化工学报,2010,61(9):2250-2256
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