aspen_石油炼制60问_翻译

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1、1.AspenPlusdoesnotgeneratedistillationcurvesforastreamcontaining4pseudo-components.Why?Togenerateadistillationcurve,astreammustcontainatleast5pseudo-componentsofnon-zeroflowtogeneratedistinctivedatapointsat10%,30%,50%,70,90%.%K:Q7G"q*@,}Aspen为什么不能生成一个物流中包含4个蒸馏点的虚拟组分的蒸馏曲线？  `;o+V6f2L答：生成一个蒸馏曲线，一个虚

2、拟组分必须至少包含5个非零蒸馏数据，分别是：10%,30%,50%,70,90%2.Forstreamswithsignificantamountoflightcomponents,thecalculatedReidvaporpressureisusuallyoff.Whyisthat?ArethereanyguidelinesforusingReidvaporpressure?对一个含有大量轻组分的物流，为什么通常计算雷德蒸汽压通常会失败？是否有关于使用雷德蒸汽压的一些指导？Reidvaporpressureistheabsolutepressureexertedbyamixture(

3、inpoundspersquareinch)determinedat100Fandatavapor-to-liquidvolumeratioof4(ASTMMethodD323).RVPisintendedforcharacterizingthevolatilityofgasolineandcrudeoil,withatypicalrangeof1to20psia.Outofthisrange,theaccuracymaybepoor.Therefore,RDVshouldnotbeappliedtoverylightorveryheavystreams.雷德蒸汽压是一个混合物在100F

4、温度和气-液比为4的时候的绝对压力（磅每平方英寸）。雷德蒸汽压是用于表征1-20psia范围内汽油和原油的相对挥发度。当超出这个范围后，准确性可能不佳。因此，雷德蒸汽压不适用非常轻或非常重的物流。3.HowistheReidvaporpressurecalculatedinASPENPLUS?在Aspen中怎样计算雷德蒸汽压？TheReidvaporpressureisvaporpressureofliquidat100F,asmeasuredaccordingtoASTMD-323procedures.AspenPlussimulatestheseproceduresbyaseries

5、offlashasfollows:雷德蒸汽压是液体在100F温度下的蒸汽压力，按照ASTMD-323方法测定。i.CheckifN2orO2ispresent;ifso,determinetheirindexvalues.检查氮气或氧气存在，如果是这样，确定其指数值。ii.Setuptotheidealgasoption-set(sysop0).设置理想气体设置选项（sysop0）iii.CalculatevolumeforAIRat32and100DegreeF,1atm.计算体积空气在32-100F，1大气压下。iv.Determinebubblepointpressureofthe

6、liquidstreamat100F.确定液体在100F的泡点压力。v.Saturatetheliquidwithairat32degreeF.饱和液体在空气中32F。vi.Mixliquidwith4vol%equivalentofairandflashat100Funderconstantvolume.混合液体占有4%空气体积并且在100F下定容闪蒸。vii.IfcalculatedReidvaporpressure.isgreaterthan26psirepeatw/oairsaturation.如果计算雷德蒸汽压，TheReidvaporpressureasmeasuredbyt

7、heASTMD-323differsfromthetruevaporpressureofthesampleduetosomesmallsamplevaporizationandthepresenceofwatervaporandair.Reidvaporpressureisoftenusedtodeterminetheappropriatetypeofstoragetank(conerooforfloatingroof)forpet