高含硫天然气脱硫工艺方案对比与优选[1]doc

CopyRight©2008LibraryofSouthWestPetroleumUniversity单位代码：10615西南石油大学硕士学位论文论文题目：高含硫天然气脱硫工艺方案对比与优选研究生姓名：刘蔷导师姓名：诸林学科专业：化学工程研究方向：天然气净化与处理2008年4月20日CopyRight©2008LibraryofSouthWestPetroleumUniversity摘要I摘要天然气作为一种清洁燃料和可替代的化工原料，将逐渐替代石油在能源消费结构中的地位，到21世纪中期进入“天然气世纪”。我国含硫天然气远景资源量为28.2×1012m3，昀终可采含硫天然气储量为8.4×1012m3。我国高含硫天然气资源也十分丰富，主要分布在渤海湾盆地和四川盆地，这些气田中的H2S含量一般为5%～92%。近年来，高含硫天然气田已进入大规模开发生产阶段，加快开发探明储量较大的高含硫天然气田已势在必行，而高含硫天然气的脱硫技术也逐渐成为天然气净化处理的热点。国外对高含硫天然气的开发已有几十年经验，其净化技术也有较大的发展。而我国在高含硫天然气净化技术方面尚处于探索阶段，很少有资料报道高含硫天然气脱硫技术的实际应用情况。因此，本论文所进行的研究是十分必要的。本研究根据脱硫工艺方法适用性的分析与脱硫方法的选择原则，结合罗家寨高含硫天然气气质情况（其中H2S含量为11.5%，CO2含量为8%）及《商品天然气技术指标GB17820-1999》，初步选择几种工艺方案；利用流程模拟软件完成工艺方案的全流程的物料衡算、能量衡算以及昀佳操作参数的确定；完成了主要工艺设备的概算；比较几种工艺方案的净化效果、能耗，完成工艺方案的技术经济对比，确定昀优工艺方案；并对昀优工艺方案的适应性进行分析。本研究通过对高含硫天然气脱硫工艺的比较及优选，为高含硫天然气脱硫工艺的研究提供了参考。关键词：高含硫天然气脱硫比较模拟CopyRight©2008LibraryofSouthWestPetroleumUniversityABSTRACTIIABSTRACTAsakindofsanitaryfuelandreplaceableindustricalchemicals,itisforeseeablethatthenaturalgaswillreplacethestuatusofthepetroleuminthematteroftheenergyuse.Untilthemediumof21century,wewillenterinthenaturalgascentury.Theamoutsofprospectresourcesofthesulfurousnaturalgasinourcountryis28.2×1012m3,andtheamountsofthesulfurousnaturalgasresourceswhichisminableis8.4×1012m3.Andtheamountsofthehighsulfurousnaturalgasresourcesisabundant,whichdistributeattheBohaiSeagulfbasinandSichuanbasin.TheH2Scontentofthenaturalgasfieldsisalways5%～92%.Inrecentyears,thenaturalgasfieldswhichcontainhighquantityofH2Shavebeendevelopedandproduced.AnditisnecessarytodevelopthenaturalgasfieldswhichcontainhighquantityofH2S.Andthedesulfurizationtechnologyofthehighsulfurousnaturalgashasbecomethehotspotofthenaturalgaspurification.Thepurificationtechnologyofthehighsulfurousnaturalgashasdevelopedatabroadsinceafewyearsago.Andthepurificationtechnologyhasdevelopedquickly.Thepurificationtechnologyofthehighsulfurousnaturalgasinourcountryhasbeenintheinvestigationstage.Andthereareonlyalittleinformationhasbeenreportedabouttheactualapplicationofthehighsulfurousnaturalgasdesulfurizationtechnology.So,itisnecessarytocarryoutthisresearch.ThispapercombinesthequalityofthesulfurousnaturalgasinLuoJiaZhaiwhoseH2Scontentis11.5%andCO2contentis8%andthequalificationofthemerchandisenaturalgasGB17820-1999.Basedontheanalysisoftheapplicabilityofthedesufurizationprocessandselectionprincipleofthedesulfurizationprocess,processschemeshavebeenchosen.Chemicalsimulationsoftwarehasbeenusedtofinishthecalculationofthematerialbalanceandenergybalance,andthebestparametersoftheprocessschemeshasbeendetermined.Thecalculationofthemainprocessequipmentshavebeenfinished.Theeffectsofthepurification,energyexpenditureandtheeconomicalefficiencyhavebeencompared,andthebestprocessschemehasbeendetermined.Andanalyzingtheadjustabilityofthebestprocessscheme.Thispaperdoesreaserchonthecomparationandselectionofthehighsulfurizationnaturalgaspurificaitonprocess,andithasgivensuggestionstothereasearchofthehighsulfurizationnaturalgaspurificaitonindustry.Keywords:thehighsulfurousnaturalgas;desulfurization;compartion;simulationCopyRight©2008LibraryofSouthWestPetroleumUniversity目录i目录摘要...............................................................IABSTRACT..........................................................II1概述.............................................................11.1研究目的与意义...............................................11.2含硫天然气净化研究现状.......................................21.3高含硫天然气净化研究现状.....................................51.3.1我国高含硫天然气开发现状.................................51.3.2高含硫天然气净化工艺研究现状.............................61.4方案研究手段.................................................81.5研究主要内容.................................................82设计基础数据...................................................102.1建设规模....................................................102.2原料天然气条件..............................................102.3净化气气质要求..............................................102.4地理位置及气象条件..........................................112.5遵循的主要标准、规范.........................................113工艺方案对比....................................................133.1工艺方案初选.................................................133.2MDEA工艺....................................................143.2.1工艺原理................................................143.2.2工艺流程................................................183.2.3工艺物流数据............................................193.2.4吸收塔操作压力的影响分析................................213.3MDEA半贫液工艺..............................................223.3.1工艺流程................................................223.3.2工艺物流数据............................................23CopyRight©2008LibraryofSouthWestPetroleumUniversity目录ii3.3.3吸收塔操作压力的影响分析................................253.4MDEA-DEA混合胺工艺..........................................273.4.1工艺原理................................................273.4.2工艺流程................................................283.4.3工艺物流数据............................................293.4.4吸收塔操作压力的影响分析................................313.5工艺方案的比较.