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柱式气液旋流分离器设计毕业论文.doc

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柱式气液旋流分离器设计毕业论文.doc

柱式气液旋流分离器结构设计1柱式气液旋流分离器设计【摘要】平衡钻井技术有利于防止钻井液漏失、能及时发现和保护油气层,并能提高机械钻速等。但是由于欠平衡装备价格昂贵,制约着这一技术的发展。鉴于这种现状,自行设计了台应用于欠平衡钻井的管柱式气液旋流分离器。管柱式气液旋流分离器是一种带有倾斜切向入口及气体、液体出口的垂直管。它依靠旋流离心力实现气、液两相分离,与传统的重力式分离器相比,具有结构紧凑、重量轻、投资节省成本等优点,是代替传统容积式分离器的新型分离装置。在气液两相旋流分析的基础上,建立了预测分离性能的机理模型,该模型包括了入口分离模型、旋涡模型、气泡及液滴轨迹模型依据机理模型,提出了管柱式旋流分离器工艺设计技术指标和工艺步骤.设计根据管柱式旋流分离器的机理模型以及设计工况,完成了管柱式旋流分离器的结构设计、强度分析、理论校核、焊接工艺设计以及分离器内气液两相流的数值模拟,为工程设计和理论设计提供一定的理论依据。【关键词】欠平衡钻井技术旋流分离器气液两相流动分离机理模型设计2GasliqulidCylindricalCycloneAuthorWangmaohuiSchoolofMechanicalEngineering,YangtzeUniversityTutorFengJinSchoolofMechanicalEngineering,YangtzeUniversity【Abstract】Thebalancedwelldrillingtechnologyisadvantageousinpreventinglossofcirculation,canpromptlydiscoverandprotecthydrocarbonzone,alsocanenhancethepenetrationrate.Buttheexpensiveunderbalanceequipmenthasrestrictedthistechnologyssdevelopment.Inviewofthesituation,Idesignedagasliqulidcylindricalcycloneindependentlyforthebalanceunderdrilling.TheGLCCisonekindhasleansthebevellingtotheentranceandthegas,theliquidexportationhangstheascendingpipe.Itcanrealizethegaslipfluidseparationdependsuponthecyclonecentrifugalforce.comparedwiththetraditionalgravitytypeseparator,whichhasthecompactstructure,thelighterweight,thesmallerinvestmentandsoon.Itsanewdisengagingequipmentwhichreplacethetraditionalvolumetypeseparator.Onthebasisofthegasliquidtwophasecycloneanalyses,hasestablishedtheforecastseparationperformancemechanismmodel,thismodelincludetheentranceseparationmodel,thewhirlpoolmodel,theairbubbleandthebubblepathmodelBasedonthemechanismmodel,proposedthetubecolumntypecycloneseparatortechnologicaldesigntechnicalspecificationandthecraftstep.Thedesignbasistubecolumntypecycloneseparatormechanismmodelaswellasthedesignoperatingmode,hascompletedthetubecolumntypecycloneseparatorstructuraldesign,theintensityanalysis,thetheoryexamination,intheweldingtechnologicaldesignaswellasthenumericalsimulationofthegasliquidtwophasefloeintheseparatorsimulations,providethecertaintheorybasisfortheengineeringdesignandthetheoreticaldesign.【Keywords】Underbalanceddrillingtechnology,cycloneseparator,GasLiquidtwophaseflow,separationmechanismodel,Design柱式气液旋流分离器结构设计3目录柱式气液旋流分离器设计.................................................................................................1绪论................................................................................................................................2欠平衡钻井技术的发展现状和前景............................................................................51、设计背景...........................................................................................................61.1选择气液旋流分离器的意义.........................................................................61.2气液旋流分离器的国内外研究现状...............................................................72、方案论证...........................................................................................................82.1旋流式气液分离方案的可行性.....................................................................82.2旋流式分离器的结构及工作原理.................................................................92.3旋流式分离器的优缺点...............................................................................93、结构分析及设计..................................................................................................103.1入口设计分析............................................................................................103.1.1入口管分析......................................................................................103.1.2入口喷嘴分析...................................................................................113.1.3双入口分析......................................................................................113.2主体结构设计分析......................................................................................113.2.1入口位置..........................................................................................113.2.2最佳外形比......................................................................................123.2.3旋流体锥度......................................................................................123.3出口管设计分析.........................................................................................124、柱式气液旋流分离器参数设计.............................................................................124.1计算分离器直径..........................................................................................124.2分离器的高度计算......................................................................................134.2.1确定上半部分的高度........................................................................134.2.2计算入口分流区的高度.....................................................................134.2.3计算旋涡区的高度............................................................................134.2.4气泡轴向距离计算............................................................................144.3分离能力计算.............................................................................................15①径向方向上...........................................................................................15②竖直方向上...........................................................................................164.4液面高度的确定..........................................................................................174.4.1气室压力p1的确定.........................................................................174.4.2液面高度Z2的确定..........................................................................184.5入口管的设计计算.......................................................................................204.6筒体强度设计..............................................................................................214.6.1设计参数...........................................................................................214.6.2筒体厚度设计....................................................................................224.7法兰的校核计算..........................................................................................224.7.1排气管法兰校核计算........................................................................224.7.2排液管管法兰校核计算.....................................................................255、气液两相流场的数值模拟...........................................................................................305.1数值计算方法简介.....................................................................................3045.1.1控制方程.........................................................................................315.1.2湍流模型..........................................................................................325.1.3多相流模型......................................................................................335.1.4数值计算方法..................................................................................355.1.5边界条件的处理..............................................................................355.2计算前处理..............................................................................................36参考文献.................................................................................................................37

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