常减压蒸馏装置减压炉进料结焦倾向研究  

STUDY ON COKING TENDENCY OF FEEDSTOCK IN VACUUM FURNACE OF ATMOSPHERIC-VACUUM DISTILLATION UNIT

作　　者：黄新龙[1] 王少锋[1] 王洪彬[1] 刘淑芳[1] 

机构地区：[1]中国石化洛阳石油化工工程公司,河南洛阳471003

出　　处：《石油炼制与化工》2013年第7期28-32,共5页Petroleum Processing and Petrochemicals

摘　　要：采用甲苯不溶物的生成量来表征油品的结焦倾向,考察了不同温度和不同停留时间对油品中甲苯不溶物生成量的影响,得到了不同性质油品的临界结焦曲线;分析了油品性质对结焦倾向的影响。结果表明:随着反应温度的升高和反应时间的延长,不同性质油品的结焦趋势均加剧,且有独立的临界结焦界线;在临界结焦界线的下方不会结焦,而在上方会有结焦前体物的生成;环烷基原油的结焦倾向严重,不宜进行减压蒸馏,更不宜进行减压深拔操作。Deep-cutting operation of vacuum distillation is limited by its investment and energy consumption and its coking tendency in vacuum furnace.In this paper,the coking tendencies of residue fractions（565 ℃） were connected with their amount of toluene insoluble（TI）,the precursor of coke,formed during heating.The effect of temperature and residence time in the furnace on the amounts of TI of heavy fractions was tested to get the critical curve of anti-coking for the fractions with different properties.It is discovered that high temperature and longer staying time in the furnace will aggravate the formation of TI and that the fractions from different base crudes have their own special critical curve of anti-coking.The test results indicate that the amount of TI can be used for judgment of coking tendency of the heavy fractions.

关 键 词：常减压蒸馏 减压深拔 结焦 结焦曲线 安全操作区域 

分 类 号：TE624.2[石油与天然气工程—油气加工工程]