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(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日中国石油大学（北京）本科毕业设计第I页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；方案设计中国石油大学（北京）本科毕业设计第II页RecoveryofLiquefiedPetroleumGasFrom1millionm3/dNaturalGasAbstractLiaoheOilfieldplanstobuildaninstallationaboutlighthydrocarbonrecoveryofliquefiedpetroleumgaswhichprocessesascaleof1millionm3/dnaturalgas.Therelationshipbetweentheyieldofliquefiedpetroleumgasandrefrigerationtemperatureandtotalenergyconsumptionbysimulationisanalyzedtodeterminetheoptimalprocessparametersthattherefrigerationtemperatureof-92℃,propaneyieldof81.00%andliquefiedgasyieldof87.83%.Becauseofcharacteristicsofthisproject,coaxialpressurizedlighthydrocarbonrecoveryprogramisultimatelydeterminedthatiswiththepairsoflowtemperatureseparationcolumnandtheexpansionplusthrottleexpansioncoolingmechanism.Theprogramusesacoldboxsystem,soitenhancestheadaptabilityoftheprocessdevicetocomponentfluctuationsandefficiencyofenergyandreducesthecostoftherefrigerantsystem.Addingduallowtemperatureseparationmachinescanreducethefeedofoffethanetower,therebyreducingthecostofthetowerequipment.Largeenergyoftherecoveryofthefeedaftercompressioncanbeusedtoheatoffethanetowerandoffbutanetowerre-boilerstosave1177.8kW.Keywords:naturalgas；aninstallationaboutlighthydrocarbonrecovery；theconductionoftheproject中国石油大学（北京）本科毕业设计第III页目录第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辽河油田轻烃回收简述..........................................................72.1.1轻烃回收液化气设计背景...........................................72.1.2原料组成.......................................................................72.1.3主要产品及产品质量要求...........................................82.2HYSYS流程模拟..................................................................82.2.1状态方程.......................................................................82.2.2工艺流程介绍.............................................................92.3关键设备工艺参数的确定......................................................112.3.1三级压缩压力的确定..................................................112.3.2确定物料经冷箱冷却后的温度..................................11中国石油大学（北京）本科毕业设计第IV页2.3.3脱乙烷塔参数的确定.................................................122.4相关产品产率及回收率........................................................14第3章工艺装置主要设备的选型.....................................................153.1压缩机....................................................................................153.1.1离心式压缩机.............................................................153.1.2往复压缩机.................................................................153.2换热器....................................................................................163.2.1换热器的选型计算......................................................173.2.1空冷器.........................................................................183.2.2水冷器.........................................................................193.2.3换热器.........................................................................203.2.4再沸器.........................................................................203.3气液分离器.............................................................................213.4膨胀机....................................................................................223.5塔............................................................................................223.5.1脱乙烷塔.....................................................................243.5.2脱丁烷塔.....................................................................243.6泵............................................................................................25参考文献...............................................................................................27致谢.......................................................................................................29附录.......................................................................................................30附录A...............