乙烯原料组分分离与裂解产物模拟优化  

Separation of ethylene feedstock components andsimulation optimization of cracking products

作　　者：武国庆[1] 梁红燕 倪晓晶 Wu Guoqing;Liang Hongyan;Ni Xiaojing(PetroChina Dushanzi Petrochemical Co.,Ltd.,Karamay,Xinjiang 833699)

机构地区：[1]中国石油天然气股份有限公司独山子石化分公司,新疆克拉玛依833699

出　　处：《炼油技术与工程》2024年第9期34-37,共4页Petroleum Refinery Engineering

摘　　要：基于某石化公司乙烯装置加工饱和液化石油气、饱和C_(5)原料典型性质与单体烃裂解产物模拟结果,利用Aspen软件设计并优化组分分离流程,对组分分离后原料进行裂解产物模拟分析。结果表明:饱和液化石油气与C_(5)原料主要组分中异丁烷与异戊烷模拟双烯收率明显低于其他组分,与异己烷相比,双烯收率分别低12.26、7.29百分点;原料优化后,饱和液化石油气与C_(5)原料模拟双烯收率分别提高5.40、6.33百分点;脱丙烷塔塔顶产品与脱异丁烷塔塔底产品混合裂解与单独裂解相比,乙烯收率增加0.16百分点,丙烯收率降低0.20百分点,若以双烯收率最大为目标,宜选择单独裂解方案;与运行初期相比,裂解炉运行到第50天时,脱丙烷塔塔顶产品与脱异丁烷塔塔底产品双烯收率分别降低1.13、0.50百分点,脱丙烷塔塔顶产品裂解炉粗管最高表面温度为1098.2℃,满足烧焦要求。Based on the typical properties of saturated liquefied petroleum gas and saturated C_(5)feedstock processed by a petrochemical company’s ethylene unit,as well as the simulation results of monomer hydrocarbon cracking products,the Aspen software was used to design and optimize the component separation process,and simulate and analyze the cracking products of the separated feedstock.The results showed that the simulated diene yields of isobutane and isopentane in the main components of saturated liquefied petroleum gas and C_(5)feedstock were significantly lower than those of other components,and the diene yields were 12.26 percentage points and 7.29 percentage points lower than those of isohexane,respectively;after optimizing the feedstock,the simulated diene yields of saturated liquefied petroleum gas and C_(5)feedstock increased by 5.40 percentage points and 6.33 percentage points,respectively;compared with separate cracking,the mixed cracking of the top product of the depropane tower and the bottom product of the deisobutane tower resulted in an increase of 0.16 percentage points in ethylene yield and a decrease of 0.20 percentage points in propylene yield,if the goal was to maximize the yield of diene,it was advisable to choose a separate cracking scheme;compared with the initial operation,when the cracking furnace was running for 50 days,the yield of diene from the top product of the depropane tower and the bottom product of the deisobutane tower decreased by 1.13 percentage points and 0.50 percentage points,respectively,the highest surface temperature of the crude tube of the cracking furnace for the top product of the depropane tower was 1098.2℃,reaching the coking requirement.

关 键 词：乙烯原料 组分分离 裂解产物 饱和液化石油气 饱和C_(5) 异丁烷 异戊烷 双烯收率 

分 类 号：TQ221.211[化学工程—有机化工]