炼油厂燃料气回收液化气过程的设计与控制研究
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摘要
以某炼油厂燃料气回收液化气(LPG)为对象,分别对3种LPG回收流程进行了研究。在稳态模拟的基础上,以年总费用为优化目标,优化了各流程的主要工艺参数。结果表明,隔壁塔流程较另外两种流程的年总费用分别降低37.66%和11.35%,表现出较大的经济优势。此外,对炼油厂燃料气回收LPG隔壁塔流程的动态特性进行了研究,提出的四点温度控制结构能够有效地抵抗进料扰动,具有良好的可控性。由此可见,隔壁塔在炼油厂燃料气回收LPG工艺中具有非常高的应用潜力。
Three recovery processes of LPG from fuel gas in a refinery are studied.On the basis of steady state simulation,the main parameters of each process were optimized,considering the minimum annual total cost as the objective function.The results showed that the process with dividing wall column can achieve 37.66%and 11.35%savings of annual total cost compared with the other two processes respectively,indicating agreater economic advantage.Moreover,the dynamic characteristics of the dividing wall column process of LPG recovery from the refinery fuel gas were investigated.The proposed four-point temperature control structure can effectively handle the feed disturbance and has a good controllability.Therefore,the application of dividing wall column in the process has a very good potential.
Three recovery processes of LPG from fuel gas in a refinery are studied.On the basis of steady state simulation,the main parameters of each process were optimized,considering the minimum annual total cost as the objective function.The results showed that the process with dividing wall column can achieve 37.66%and 11.35%savings of annual total cost compared with the other two processes respectively,indicating agreater economic advantage.Moreover,the dynamic characteristics of the dividing wall column process of LPG recovery from the refinery fuel gas were investigated.The proposed four-point temperature control structure can effectively handle the feed disturbance and has a good controllability.Therefore,the application of dividing wall column in the process has a very good potential.
引文
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[14]Li Jun,Zhou Hao,Huang Xiaoqiao,et al.Novel control structure design of differential pressure thermally coupled reactive distillation for methyl acetate hydrolysis[J].China Petroleum Processing and Petrochemical Technology,2018,20(3):85-95
[2]李亚军,华贲,李国庆.我国液化石油气资源的优化利用[J].石油炼制与化工,2005,36(3):46-50
[3]赵天真.炼厂瓦斯气中C3+、H2回收装置设计[J].甘肃石油和化工,2011,25(4):25-29
[4]乔爱军,范传宏.氨制冷技术在轻烃回收工艺中的应用[J].石油炼制与化工,2014,45(11):85-88
[5]李法中,尹燕波.优化工艺参数提高液化石油气回收率[J].石油化工设备,2015,44(3):70-75
[6]李萱,李洪,高鑫,等.热耦合精馏工艺的模拟[J].化工进展,2016,35(1):48-56
[7]孙兰义,李军,李青松.隔壁塔技术进展[J].现代化工,2008,28(9):38-41
[8]何桂春,张英,伍祥,等.分壁塔替代两塔分离芳烃流程改造的研究[J].石油炼制与化工,2018,49(2):95-99
[9] Gentry J C,Bhargava M,Nelson C,et al.Maximize LPG recovery from fuel gas using a dividing wall column[J].Hydrocarbon Processing,2015,94(1):39-43
[10]江林.从炼厂燃料气中最大量回收液化气的新工艺[J].石油石化绿色低碳,2015,5(2):50-51
[11]Hajizadeh A,Mohamadi-Baghmolaei M,Azin R,et al.Technical and economic evaluation of flare gas recovery in a giant gas refinery[J].Chemical Engineering Research and Design,2018,131:506-519
[12]Douglas J M.Conceptual Design of Chemical Processes[M].New York:McGraw Hill,1988:568-577
[13]陈梦琪,于娜,刘育良,等.反应精馏隔壁塔生产乙酸正丁酯的优化与控制[J].化工学报,2016,67(12):5066-5081
[14]Li Jun,Zhou Hao,Huang Xiaoqiao,et al.Novel control structure design of differential pressure thermally coupled reactive distillation for methyl acetate hydrolysis[J].China Petroleum Processing and Petrochemical Technology,2018,20(3):85-95