延迟焦化加热炉介质停留时间对装置焦炭产率的影响  

Impacts of medium residence time in coking furnace on coke yield

作　　者：赵日峰[1] 

机构地区：[1]中国石油化工股份有限公司金陵分公司,江苏省南京市210033

出　　处：《炼油技术与工程》2012年第5期8-11,共4页Petroleum Refinery Engineering

摘　　要：延迟焦化装置重油的热反应过程主要在焦炭塔内完成,但其反应所需热量全部由焦化炉提供,因此理论上延长介质在焦化炉管内的停留时间,增加焦化炉提供给介质生焦反应的热量将影响重油在焦炭塔内的反应深度,从而影响延迟焦化装置的产品分布。为消除原料性质变化对产品分布的影响,在三炉并列的1.20 Mt/a延迟焦化工业装置上,通过焦化炉管内外过程模拟技术进行方案论证,对单台焦化加热炉进行了延长介质在炉内停留时间的技术改造试验。4个月的工业生产数据证明,适当延长介质在炉管内的停留时间,可增加介质在焦化炉内的反应深度,使焦炭产率下降3.99个百分点。The thermal reactions of residue are mainly accomplished in coke drum in the delayed coking unit, but the thermal energy for cracking reaction is all supplied by the coking furnace. Therefore, extending the residence time in coking furnace and increasing the thermal energy for reaction can affect the reaction depth in coke drum theoretically, and then improve the unit product distribution. A commercial experiment for extending the media residence time in coking furnace was conducted on a 1.2 MM TPY commercial unit with three parallel furnaces to study the impact of the difference of feedstock properties on product yields, and the process simulation technology for coking furnace was employed to demonstrate the best process scheme. The 4 months＇ commercial statistic data indicate that the coke yield can be decreased by 3.99% by extending the residence time in coking furnace and improving the cracking depth of media in furnace.

关 键 词：延迟焦化 焦化炉 深度裂解 焦炭产率 停留时间 

分 类 号：TE624.32[石油与天然气工程—油气加工工程]