减压塔空塔喷淋技术与应用  

Application of Direct-contact Heat Transfer in Vacuum Distillation Tower

作　　者：于福东[1] 王辰涯 李和杰 杜翔 YU Fu-dong;WANG Chen-ya;LI He-jie;DU Xiang(SINOPEC Qingdao Petrochemical Co.,Ltd.,Shandong Qingdao 266043;SINOPEC Guangzhou Engineering Co.,Ltd.,Guangdong Guangzhou 510620,China)

机构地区：[1]中国石化青岛石油化工有限责任公司,山东青岛266043 [2]中石化广州工程有限公司,广东广州510620

出　　处：《广州化工》2023年第2期200-203,共4页GuangZhou Chemical Industry

摘　　要：论述了减压拔出率的影响因素和提高减压拔出率的技术措施,包括模拟方法改进与工艺参数优化、高效低压降填料和塔内件、空塔喷淋传热技术,通过改造实例说明了空塔喷淋传热技术设计方案和实施效果。在减压塔顶循段采用双层实心锥喷淋代替原填料和内件,可以显著降低减压塔压降,显著提高减压塔拔出率,减压塔顶绝压由1.9~2.2 kPa降低到1.3~1.5 kPa,减压渣油500℃馏出量平均值由5.1 mL降低到4.06 mL。Main factors of cut yield in vacuum distillation tower(VDT)and technical approaches were reviewed to improve cut yield,including an improved simulation method and mass transfer correlations,high efficiency packing and internals and direct-contact(spray)heat transfer technology.In a VDT revamp project,spray nozzles was used to replace structured packing and internals in top heat exchange section of VDT,result showed that lower pressure drop and significant increased in vacuum cut yield,pressure at top of VDT decreased from 1.9~2.2 kPa to 1.4~1.55 kPa,fraction lower than 500℃in vacuum residue decreased from 5.1 mL to 4.6 mL.

关 键 词：减压塔 减压拔出率 空塔喷淋换热 喷嘴 

分 类 号：TE624[石油与天然气工程—油气加工工程]