伴生气轻烃回收液化气工艺设计.docx

(北京)CHINAUNIVERSITYOFPETROLEUM毕业设计100×104Nm3/d伴生气轻烃回收液化气工艺设计院系名称：化学工程学院专业名称：化学工程与工艺学生姓名：郭小丰学号：2008031317指导教师：张文慧完成日期2012年6月6日100×104Nm3/d伴生气轻烃回收液化气工艺设计摘要辽河油田拟新建一套处理规模为100×104Nm3/d的轻烃回收液化气装置。通过模拟计算分析了液化气的收率与制冷温度和总能耗之间的关系确定了制冷温度为-92℃丙烷收率为81.00%液化气收率为87.83%的最优工艺参数。针对本工程特点最终确定了双低温分离器和膨胀机制冷加节流膨胀制冷的同轴增压的轻烃回收方案。该方案采用了冷箱系统增强了流程装置对组分波动的适应性减少了冷剂装置的投资能量利用率高；采用双低温分离塔减少了脱乙烷塔的进料从而减少了塔设备的投资；回收一级与二级压缩后的原料气的高焓值来加热脱乙烷塔和脱丁烷塔的再沸器节约1177.8kW。关键词：天然气；轻烃回收装置；方案设计RecoveryofLiquefiedPetroleumGasFrom1millionm3/dNaturalGasAbstractLiaoheOilfieldplanstobuildaninstallationaboutlighthydrocarbonrecoveryofliquefiedpetroleumgaswhichprocessesascaleof1millionm3/dnaturalgas.Therelationshipbetweentheyieldofliquefiedpetroleumgasandrefrigerationtemperatureandtotalenergyconsumptionbysimulationisanalyzedtodeterminetheoptimalprocessparametersthattherefrigerationtemperatureof-92℃propaneyieldof81.00%andliquefiedgasyieldof87.83%.Becauseofcharacteristicsofthisprojectcoaxialpressurizedlighthydrocarbonrecoveryprogramisultimatelydeterminedthatiswiththepairsoflowtemperatureseparationcolumnandtheexpansionplusthrottleexpansioncoolingmechanism.Theprogramusesacoldboxsystemsoitenhancestheadaptabilityoftheprocessdevicetocomponentfluctuationsandefficiencyofenergyandreducesthecostoftherefrigerantsystem.Addingduallowtemperatureseparationmachinescanreducethefeedofoffethanetowertherebyreducingthecostofthetowerequipment.Largeenergyoftherecoveryofthefeedaftercompressioncanbeusedtoheatoffethanetowerandoffbutanetowerre-boilerstosave1177.8kW.Keywords:naturalgas；aninstallationaboutlighthydrocarbonrecovery；theconductionoftheproject目录第1章前言11.1油田伴生气回收的目的11.2天然气轻烃回收的主要产品11.2.1干气11.2.2液化气21.2.3轻油21.3国内外LPG工艺技术概况21.3.1国内技术51.3.2国外技术6第2章工艺流程设计72.1