天然气处理工艺,设备及原理

天然气厂主体装置工艺流程及工艺原理TheProcessFlowandPrincipleofMainUnitsinGasPlant脱硫SulfurRemoval脱水Dehydration硫磺回收SulfurRecovery尾气处理TailGasTreatment主体工艺MainProcess空氮站Air&N2Station锅炉给水框架BoilerFeedwater燃料气系统FuelGasSys.火炬及放空系统Flare&VentSys.硫磺成型及储存SulfurStorage&Forming商业计量站GasCommercialMeteringStation水处理系统WaterTreatmentSys.气田水处理系统ProducedwaterTreatment公用工程及辅助设施Utilities&AuxiliaryFacilities自控机柜间CentralControlRoom35kV变电站35kVSubstation循环水系统CoolingWaterSys.消防水给水系统FireWaterSupplySys.天然气处理厂GasTreatmentPlant工厂组成PlantComponents2溶剂脱硫SulfurRemoval脱水Dehydration硫磺回收SulfurRecovery尾气处理TailGasTreatment主体工艺MainProcess空氮站Air&N2Station锅炉给水框架BoilerFeedwater燃料气系统FuelGasSys.火炬及放空系统Flare&VentSys.硫磺成型及储存SulfurStorage&Forming商业计量站GasCommercialMeteringStation水处理系统WaterTreatmentSys.气田水处理系统ProducedwaterTreatment公用工程及辅助设施Utilities&AuxiliaryFacilities自控机柜间CentralControlRoom35kV变电站35kVSubstation循环水系统CoolingWaterSys.消防水给水系统FireWaterSupplySys.天然气处理厂GasTreatmentPlant工厂组成PlantComponents3GasPlantoverviewSulfurRemovalUnit脱硫装置(2)TailGasTreatment&SourH2OStripping尾气处理&酸H2O汽提(1)SulfurRecoveryUnit硫磺回收装置(1)SulfurRemovalUnit脱硫装置(1)CommercialMeteringStation商业计量站Dehydration三甘醇脱水LiquidSulfurStorageTanks液硫储罐Incinerator灼烧炉SulfurForming硫成型Incinerator灼烧炉SulfurRecoveryUnit硫磺回收装置(2)TailGasTreatment&SourWaterStripping尾气处理&酸H2O汽提(2)FeedGasFromGasTerminalStation来自末站的原料气WetTreatedGas处理湿气AcidGas酸气AcidGas酸气AcidGas酸气SalesGastoGrid商品气至管网ProductSulfurtoStorage硫磺产品储存VenttoAtm.VenttoAtm.4AcidGas酸气脱硫单元SulfurRemovalUnitGasPlantoverviewSulfurRemovalUnit脱硫装置(2)TailGasTreatment&SourH2OStripping尾气处理&酸H2O汽提(1)SulfurRecoveryUnit硫磺回收装置(1)SulfurRemovalUnit脱硫装置(1)CommercialMeteringStation商业计量站Dehydration三甘醇脱水LiquidSulfurStorageTanks液硫储罐Incinerator灼烧炉SulfurForming硫成型Incinerator灼烧炉SulfurRecoveryUnit硫磺回收装置(2)TailGasTreatment&SourWaterStripping尾气处理&酸H2O汽提(2)FeedGasFromGasTerminalStation来自末站的原料气WetTreatedGas处理湿气AcidGas酸气AcidGas酸气AcidGas酸气SalesGastoGrid商品气至管网ProductSulfurtoStorage硫磺产品储存VenttoAtm.VenttoAtm.6AcidGas酸气脱硫目的Purpose•通过气-液吸收、气-固吸附和化学转化等途径除去天然气中的含硫化合物和部分CO2，使其达到商品天然气管输标准。•ToremovesulfurcompoundsandexcessiveCO2fromsournaturalgasbymeansofgas-liquidabsorption,gas-solidadsorptionandchemicalconversionssothatthegasmeetsthepipelinetransportationspecifications.脱硫工艺方法•本厂使用砜胺溶液Sulfinol-M（萨菲诺-M）进行脱硫TheplantusesSulfinol-Mtoremovesulfur.•溶液組份：甲基二乙醇胺50%，环丁砜15%，水35%。CompositionoftheSolvent:50%MDEA,15%sulfolane,35%waterSulfurRemovalUnit脱硫装置原料气脱硫Feedgassulfurremoval再生塔Regenerator闪蒸罐FlashTank主吸收塔MainAbsorber回流泵过滤分离器FeedgasFilter分离部分SeparationSection去除原料气中的大量水和杂质Removewaterandimpuritiesfromthefeedgas吸收部分AbsorptionSectin砜胺溶液和原料气在吸收内逆向接触，吸收H2S、CO2和部分有机硫（脱硫）Thesulfinol-McountercurrentswithfeedgasandabsorbsH2S,CO2andpartoforganicsulfur(sulfurremoval)闪蒸部分FlashSection闪蒸出砜胺富液中夹带的碳氢化合物Flashhydrocarbonoutoftherichsulfinol-M再生部分RegenerationSection用加热的方式解析出富液中的酸气，Therichsulfinol-Misregeneratedbyheatingittodriveoffacidgas富液再生Richsulfinol-Mregeneration将再生后的贫液打回吸收塔循环使用Theleansulfinol-Mregeneratedisroutedtoabsorberforrecycling湿净化气去脱水单元WetTreatedgastodehydrationunit解析出的酸气送入硫磺回收单元AcidgastosulfurrecoveryunitSulfurRemovalUnit–脱硫设备清单塔•脱硫吸收塔•闪蒸气吸收塔•再生塔罐•原料气分离器•湿净化气分离器•闪蒸罐•回流罐•砜胺液排放罐•凝结水分离器10EquipmentList-SulfurRemovalColumnsMainAbsorberColumnFlashGasAbsorberColumnRegeneratorColumnDrumsFeedGasSeparatorDrumWetTreatedGasK.O.DrumFlashDrumRefluxDrumSulfinolDrainDrumCondensateWaterSeparatorSulfurRemovalUnit11换热器和冷凝器贫富砜胺液换热器贫砜胺液冷却器贫砜胺液后冷却器再生塔重沸器塔顶冷凝器塔顶后冷器过滤器原料气过滤分离器砜胺液机械过滤器活性炭过滤器砜胺液后过滤器排放溶液过滤器Exchangers&CoolersLean/RichSulfinolExchangersLeanSulfinolCoolerLeanSulfinolTrimCoolerRegeneratorReboilerOverheadCondenserOverheadTrimCoolerFiltersFeedGasFiltersLeanSulfinolFilterActivatedCarbonFilterSulfinolTrimFilterDrainedSulfinolFilterSulfurRemovalUnitPumps&Drivers–LowPressureLeanSulfinolPumps–HighPressureLeanSulfinolPumps–RefluxPumps–DrainedSulfinolPump–PowerRecoveryTurbine12泵和驱动器低压贫砜胺液泵高压贫砜胺液泵回流泵排放溶液泵富砜胺液能量回收透平）ENVIRONMENTFOCUS环保关注点•气体污染：H2S泄漏、含硫闪蒸气泄漏•Gaspollution:H2Sleakage,flashgasleakage•固体污染：固废物堆放、•Solidpollution:solidwastepiles•液体污染：脱硫溶液泄漏、化学药剂泄漏、•Liquidpollution:desulfurizationsolutionleakage,chemicalleakage•热辐射：换热器、重沸器、蒸汽泄漏•HeatRadiation:heatexchanger,re-boilerandsteamleakage•噪声污染：管线噪声、机械噪声•Noisepollution:ductnoise,mechanicalnoise脱水单元DehydrationUnitGasPlantoverviewSulfurRemovalUnit脱硫装置(2)TailGasTreatment&SourH2OStripping尾气处理&酸H2O汽提(1)SulfurRecoveryUnit硫磺回收装置(1)SulfurRemovalUnit脱硫装置(1)CommercialMeteringStation商业计量站Dehydration三甘醇脱水LiquidSulfurStorageTanks液硫储罐Incinerator灼烧炉SulfurForming硫成型Incinerator灼烧炉SulfurRecoveryUnit硫磺回收装置(2)TailGasTreatment&SourWaterStripping尾气处理&酸H2O汽提(2)FeedGasFromGasTerminalStation来自末站的原料气WetTreatedGas处理湿气AcidGas酸气AcidGas酸气AcidGas酸气SalesGastoGrid商品气至管网ProductSulfurtoStorage硫磺产品储存VenttoAtm.VenttoAtm.15AcidGas酸气脱水目的Purpose•采用不同工艺脱除天然气中水份，使其达到商品天然气管输标准中水露点。•Toremovewaterfromgasbydifferentmethodstoensurethegasiswithindewpointspecificationforsalesgaspipelinetransportation.脱水工艺方法（本厂使用TEG（三甘醇）脱水TheplantusesTEGfordehydration.—OH），在结构上与水相似，甘醇的羟基与水分子可以形成氢键，由于缔合分子的键长很长，键能小，因此缔合分子是可逆的，并且可