aspen工程软件在甲醇精馏工艺设计中的应用

第34卷第4 Aspen工程软件在甲醇精馏工艺设计中的应应于舟(焦化进行模拟计算。计算表明,该精馏过程汽相符合理想气体定律和亨利定律,液相为非理想溶液,采用NRTL或UNIQUAC物性,乙醇与甲醇在精馏塔中无法进行有效分离。WILSON物性方法时的模拟计算结果能够满足工艺要求,精馏塔塔顶馏出液中甲醇含量高达99.99%。Aspen工程软件甲醇溶液精馏模拟计算Texaco(德士古合成气低压法生产甲醇。粗甲醇中含纯度甲醇,必须对粗甲醇进行精馏提纯。精馏工艺包括加压精馏、常压精馏和甲醇回收三个工段。由于粗甲醇体系属于多组分系统,本文借助Aspen工程软件对三个工段进行了模拟计算,为精馏工艺的设计开发 1粗甲醇03在换热器C-01中被加压塔塔底馏出液加热后进入加压精馏塔E-01的中部进行精馏,塔顶馏出物在换热器C-02中将常压精馏塔的釜液加热蒸发后一部分回到塔顶,一部分05)作为产品。塔E-02中部进行精馏。塔顶馏出物06与05一样作为产品。塔底馏出液一部分经加热蒸发后回到塔底,一部分07)作为废08中主要含有甲醇、水和杂醇,进入回收塔E-03的中部进行甲醇蒸馏回11,

2、粗甲醇03来自合成工段,含有甲醇、水、乙仲丁醇、异戊醇和叔丁醇等温度103138kPa。根据国标GB338—92中甲醇优等品的要求各塔馏出物的组成要求如表1。由于一定条件下精馏塔之间存在一一对应的关系[2],根据表1的组成可以确、表1初甲醇及各塔馏出物的组成要 (w,%物85.99.099.4.水14.0090.00000.1.杂00003.注:ppm106(w。以下同 ,精馏时的温度范围为40℃～150105～1000kPa。本系统采用理想NRTLUNIQUACWILSON等3。通1NRTLUNIQUAC物性方法下的甲醇精馏工艺计NRTLUNIQUAC加压塔进料板位置对05产品中乙醇含量的影响如图2所示。 采用WILSON物性方法对甲醇精馏过程进行模拟计算,精馏塔的操作参数见表4,计算结果见表5。表4E-E-E-出物中乙醇含量的影响如图3。由图3,精馏塔塔板数对塔顶馏出物中乙醇23,在上述两种物性方法下,加压精馏塔的塔板数和进料位置对乙,Aspen23所示。由表23可见,虽然加压精馏塔塔顶馏出物中甲,05中的乙醇含量超过工艺要求和含量的影响极,NRTL和UNIQUAC两种物性方表2NRTL物性下精馏塔馏出物组 (w,%99.99.099.4.水0090.000000.0.00003.表3UNIQUAC物性下精馏塔馏出物组 (w,%

表5WILSON物性下精馏塔馏出物计算结果(w物99.99.099.4.水090.000000.1.00003.对比51可见在表4操作条件下,Aspen,WILSON物性方物性方法可以描述非理想溶液,能够处理任何极性和非极性化合物的混合,适用于中低压状况,以及混合物的热交换过程,尤其适用-水体系[3]。因此,本文从设计计算对比中证明了WILSON物4操作条件下的计算结果能够满足甲醇精馏的设计要求,因此由理论塔板数、进料位置和侧提位3结在汽相符合理想气体定律和亨利定律,液相为非理想溶液的该精馏过程中采用NRTLUNWILSONAspen精馏计算可以得到纯度达99.99%的甲醇产品。1.国内外甲醇生产及应用发展情况.与甲醇,2004,2):1～5胡英,吕瑞东,.物理化学.:高等教育,3190,AspenPlusReferenceManual-Volume2,PhysicalPropertyMethodsandModels,1996,2～54,3～77 99.99.099.4.水0090.:男,1974年生。博士,研究方向:化学工程200040余篇。电邮:yinshengchen@,地址市龙吴路4280号00.0.海焦化设计院,20024100003.收稿日期:2005-04-18;:康莉 CHEMICALENGINEERINGOFOIL& Aug.2005,Vol.34,No.VOL.34,NO.4,pp245～247,2005(ISSN1007-3426,INCHINESE):Thispaperstudiestheinfluencesoftem2peratureofremovingoil,H2O2treatingtemperature,re2generationdurationonhydrationreactionduringregenera2tionofcyclohexenehydrationcatalystbygaschromatogra2phyandgravimetry,etc..Theresultshowsthatoptimumregenerationconditionsare:100℃ofremovingoiltemper2ature,90℃ofH2O2treatingtemperatureand24hoursofregenerationduration.DuringMHregeneration,thelossandconsumptionofMHdecreaseconsiderablyandNOLoutputincreasesafteroptimizationofremovingoil,pre2paringnewMH,H2O2treatingandwaterwashingopera2:cyclohexenehydrationcatalyst,regener2ation,optimizationTheApplicationofAspenEngineeringSoftwareontheDesignoftheMethanolRectificationChenYinsheng,YinYuzhou(ShanghaiCokingandChemicalCorporation).CHEMICALENGINEERINGOFOIL&GAS,VOL.34,NO.4,pp251～252,2005(ISSN1007-3426,INCHINESE):TheAspenengineeringsoftwareisap2pliedonthesimulationofthemethanolaqueoussolutionrectification.Theaqueoussolutioncontainsofaceton,ethanol,propanol,butanol,pentanol,water,andmetha2nol.ItisinvestigatedthattheidealgaslawandtheHen2rylawaresuitablefortheprocess.Ethanolcan’tberatedfrommethanolwiththeNRTLorUNIQUACpropertymethod.ThesimulationresultswiththeWILSONproper2tymethodareconsistentwithdesign.Themethanolmassfractiononthetopofrectificationtowerisupto99.99%.:Aspenengineeringsoftware,methanolaqueoussolution,rectification,simulationStudyontheRefiningofDieselbyComplexingDesul2furizationSunZongli,WangEnyang,XuHuilin,etal(Nan2yangWaxFineChemicalFactory,HenanOilfield).CHEMICALENGINEERINGOFOIL&GAS,VOL.34,NO.4,pp255～257,2005(ISSN1007-3426,INCHI2NESE):Basedontheprincipleofthatmetalchlo2rideandorganicsulfidecanproducewater-solubilitycomplexingcompoundwhichcanbeextracted,aftercom2paringthedesulfurizingeffectoftheDMSOandDMF,DMFischosenasextractingagentformoreexperiments.AfterevaluatingthedesulfurizationabilityofNiCl2,FeCl3andCuCl2,thecorrosivenatureandtheprice,FeCl3wasscreenedoutastheoptimumcomplexingagent.Using

uniformdesignexperimentalmethod,theoptimumcomplexingandextractingconditionisthat97.6%DM1.1%FeCl3and1.2%polarsolventaftertheregressionequationwasestablishedandmathematicalysiswascarriedout.Italsoshowsitisdifficulttocontrolthesul2furconcentrationbelow400ppmthroughcomplexingandextractingdesulfurization.:complexingextraction,dieselrefining,uniformdesign,desulfurizationDesulphurizationTechnologiesofNaturalGasandRefineryFuelGaswithMedium-sizeSulphurLiuYong1,LiuRong2,TuYan1(1.RINGT,SouthwestOilandGasfield;2.SichuanPengzhouCityNanchengMiddleSchool).CHEMICALENGINEERINGOFOIL&GAS,VOL.34,NO.4,pp258～261,2005(ISSN1007-3426,INCHIN:Thispapersummarizesfivetypesoftreattechnologiesofnaturalgasandrefineryfuelgaswithme2dium-sizesulphurthroughputs.Theyincludeamine/clause/TGTcombinations,iron-baseliquidredoxprocess,amine/liquidredoxprocesscombinations,bio2logicalgasdesulphurizationprocessandnonaqueouscrys2talsulphurprocess.Typicalprocessflowsfirstarere2viewedanddiscussed,thenadvantagesandlimitationsofprocessesare:medium-sizesulphurthroughputs,naturalgas,refineryfuelgas,desulphurizationtechnologyComprehensiveEvaluationofQinghaiCrudeOI.ConventionalEvaluaZhangJuntao,LiangShengrong,HeLi,etal(Insti2tuteofChemicalEngineering,Xi’anPetroleumUniversi2ty).CHEMICALENGINEERINGOFOIL&GAS,VOL.34,NO.4,pp262～264,2005(ISSN1007-3426,INCHINESE):ThepropertiesofQinghaicrudeoilandvariousdistillateswereyzedandevaluatedcompr