朱丽云,刘泽田,范怡平,卢春喜

• 1:中国石油大学(北京)重质油国家重点实验室

摘要(Abstract)：

在催化裂化工业中,将部分温度较低的待生剂与高温再生剂作为两股进料引入提升管可实现增加剂油比、提高目标产品收率的目标。今在一套大型冷模实验装置上,采用热颗粒示踪技术考察了一种能够实现冷、热两股催化剂混合的FCC提升管预提升结构内冷、热颗粒的混合特性;采用混合指数来量化冷、热颗粒在预提升段内的混合行为;并分析了操作条件对冷、热颗粒混合的影响。研究结果表明,在预提升底部,温度分布明显不均,混合指数偏小,随着提升管预提升轴向高度的提高,温度分布逐渐趋于均匀,混合指数也变大,说明冷热颗粒混合得越好;而中心管表观气速较低时,混合指数相对较大,冷、热颗粒混合较好;当冷颗粒与热颗粒循环强度比例接近3:2时,冷、热颗粒混合较为理想。

关键词(KeyWords)： 预提升结构;热颗粒示踪技术;混合;混合指数

Abstract:

Keywords:

基金项目(Foundation): 国家重点基础研究发展计划(973计划)2012CB215000

作者(Author): 朱丽云,刘泽田,范怡平,卢春喜

参考文献(References)：

• [1]E Cheng-lin(鄂承林),FAN Yi-ping(范怡平),LU Chun-xi(卢春喜).Matching of the catalysts with feed jet gas in the feed injection section of FCC riser(提升管喷嘴进料段内油、剂两相接触状况研究)[J].J Chem Eng of Chinese Univ(高校化学工程学报),2008,22(3):447-453.
• [2]Ramos J G F,Fusco J M,Sandes E F.A new way to deal with thermal balance in fluid catalytic cracking process[C]:Proceedings of the 17th World Petroleum Congress.Brazil:Institute of Petroleum,2002,81-93.
• [3]CHEN Man-qiao(陈曼桥),MENG Fan-dong(孟凡东).FDFCC-III process for enhancing propylene yield and producing clean gasoline(增产丙烯和生产清洁汽油新技术——FDFCC-Ⅲ工艺)[J].Petroleum Processing and Petrochemicals(石油炼制与化工),2008,39(9):1-4.
• [4]ZHU Li-yun(朱丽云),LIU Ze-tian(刘泽田),FAN Yi-ping(范怡平).Solids holdup distribution of a new pre-lifting structure of FCC riser(新型催化裂化提升管反应器预提升结构内固含率的分布)[C]:Proceedings of 8th Annual Conference of Chinese Society of Particuology cum Symposium on Particle Technology across Taiwan Straits(中国颗粒学会第八届学术研讨会暨海峡两岸颗粒技术研讨会论文集).Hangzhou(杭州):Chinese Society of Particuology(中国颗粒学会),2012.
• [5]Rhodes M J,Zhou S,Hirama T,et al.Effects of operating conditions on longitudinal solids mixing in a circulating fluidized bed riser[J].AIChE Journal,1991,37(10):1450-1458.
• [6]Avidan A,Yerushalmi J.Solids mixing in an expanded top fluid bed[J].AIChE Journal,1985,31(5):835-841.
• [7]Ambler P A,Milne B J.Residence time distribution of solids in a circulating fluidized bed:Experimental and modelling studies[J].Chemical Engineering Science,1990,45(8):2179-2186.
• [8]Wei F,Wang Z,Jin Y,et al.Dispersion of lateral and axial solids in a cocurrent downflow circulating fluidized bed[J].Powder Technology,1994,81(1):25-30.
• [9]WEI Fei(魏飞),CHEN Wei(陈卫),JIN Yong(金涌).Solids residence time distribution in a CFB riser(循环流化床提升管中固体颗粒停留时间的分布)[J].J Chem Eng of Chinese Univ(高校化学工程学报),1996,10(3):264-270.
• [10]McMillan J,Zhou D,Saberian M,et al.Measurement techniques to characterize the contact between injected liquid and circulating solids in a downer mixing chamber[J].Powder Technology,2006,161(3):175-184.
• [11]Fushimi C,Guan G,Nakamura Y,et al.Mixing behaviors of cold–hot particles in the downer of a triple-bed combined circulating fluidized bed[J].Powder Technology,2012,221:70-79.
• [12]Valenzuela J A,Glicksman L R.An experimental study of solids mixing in a freely bubbling two-dimensional fluidized bed[J].Powder Technology,1984,38(1):63-72.
• [13]Chandratilleke G R,Yu A B,Bridgwater J,et al.A particle scale index in the quantification of mixing of paticles[J].AIChE Journal,2012,4(58):1099-1118.