延迟焦化装置分馏塔侧线取热优化.pdf

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1、石油学报(石油加工)2014年1O月ACTAPETROLEISINICA(PETR0LEUMPR0CESSINGSECTION)第3O卷第5期文章编号：1001—8719(2014)05—0844—07延迟焦化装置分馏塔侧线取热优化蒋良雄，李建村，王元华，王建文，沈建勇，严明(1_中国石化扬子石化有限公司，江苏南京2115212．华东理工大学机械与动力212程学院，上海200237)摘要：某公司延迟焦化装置分馏塔侧线循环取热不充分，导致分馏塔热量过剩，整体温度高于设计值，影响产品质量和下游设备的正常运行，造成能量浪费。为解决该问题，运用Aspen

2、Plus软件，采用合适的模拟策略，建立了分馏塔系统模型，分析了分馏塔的用能情况。通过流程模拟和正交试验法，以渣油换热终温为目标变量，优化得到了各侧线循环流量的最佳组合。结果表明，增加柴油循环和塔底循环油循环流量、降低顶循环、中段循环和重蜡油循环流量，可以将减压渣油换热后的温度从295．8℃提高到306．6"C，减少加热炉燃料气耗量约275．02Nm。／h，提高了分馏塔用能效率，降低了装置能耗。关键词：延迟焦化；分馏塔；取热优化；流程模拟；正交试验中图分类号：TQO218文献标识码：Adoi：10．3969／j．issn．10018719．2014

3、．05．013OptimizationofPump—RoundEnergyRecoveryRatiosintheMainFractionationColumnofDelayedCokingUnitsJIANGLiangxiong，LIJiancun，WANGYuanhua，WANGJianwen，SHENJianyong，YANMing(1．YangziPetrochemicalCompanyLimited，SINOPEC，Nanjing211521，China；2．SchoolofMechanicalandPowerEngineering，Ea

4、stChinaUniversityofScienceandTechnology，Shanghai200237，China)Abstract：Thepump—roundenergyrecoveryratiosinthemainfractionationcolumnofdelayedcokingunitswereinsufficient，resultinginmoreexcessiveheatinfractionationcolumnandhighertemperatureoftheentirefractionationcolumnthandesig

5、nvalues，whichwouldaffectthenormaloperationofequipmentsdownstreamandcausewasteofenergy．Inordertosolvetheproblem，amodelofthefractionationcolumnsystemwasestablishedanditsoperationstatuswasanalyzedbyusingtheAspenPluswithpropersimulationstrategy．Basedontheanalysisabove，aimingatimp

6、rovingthefinaltemperatureofvacuumresidue，abestcombinationofthepump—roundflowratesofthefractionationcolumnwasobtainedbyoptimizingwithsimulationandorthogonalexperimentmethod．Theresultsprovedthat。thefinaltemperatureofvacuumresiduecouldbeincreasedfrom295．8~Cto306．6~Cbyincreasingt

7、hepump—roundflowrateofdieselandbottomcirculatingoilanddecreasingthatoftopreflux，middleandheavywaxoil．Thustheconsumptionoffurnacegascouldbereducedby275．02Nm。／h，theenergyutilizationefficiencyofthefractionationcolumnwasenhancedandtheenergyconsumptionoftheunitwasreduced．Keywords：

8、delayedcoking；fractionationcolumn；optimizationoftheenergyrecovery；pr