煤化工多联产系统中的煤气化过程模拟

化学工程师Sum160No.1ChemicalEngineer20091:2008-11-15:(1985-),,:,,,:1002-1124(2009)01-0021-03煤化工多联产系统中的煤气化过程模拟刘钧,李建伟,赵晓,雷昭,李腾山(,710054):,,AspenPlus,,,CO,,,:;;:TQ019;TQ545:BSimulationofgasificationprocessformultipleCo-generationsystemincoalchemicalindustryLIUJun,LIJian-we,iZHAOXiao,LEIZhao,LITeng-shan(SchoolofChemicalandChemicalEngineering,XicanUniversityofScienceandTechonolgy,Xia'n710054,China)Abstract:TexacogasificationtechnologyisbasedonEntrained-BedGasifier,whichhasagoodcompatibilitywithcoa,landstandsforthedirectionofcoalgasificationtechnologybyitscleanlinessandhighefficiency.ItisusedAspenPlustosimulateTexacoCoalgasificationprocess,includingcoal-slurrypreparation,gasification,COshift,lowtemperaturemethanolwashing.Itisintroducedthesimulationprocessdetailedly,andfigureouttheou-tletgascomposition.Keywords:coalgasification;texacogasifier;processsimulation,/0,,,,,,,[1],,,17070,,O2,,60%~65%,20%2.8~6.5MPa,1300~1400e,COH280%99.6%O2,COH22AspenPlus,2000t#d-1,2000t#d-1,,,,122刘钧等:煤化工多联产系统中的煤气化过程模拟200911Fig.1AnalogsimulationflowchartofTexacogasification1Table1Analyzingindexesofselectedcoals()/%()/%(BTU/lb)CHNSASHOHHV9.077.5936.9755.4478.035.061.691.977.595.66127752.1(2),,,60%~70%,22Fig.2Coalslurrypreparationunit2DECOMP,AspenPlusRyieldDECOMP,CHOSN,AspenPlusDE-COMPCOAL1[2]2.2,:2.2.1CO+H2O=CO2+H2+41123kJ#kmol-1:Kp=PCO2#PH2/PCO#PH2O(1)Kp;PCO2PH2PCOPH2O:CO2H2COH2OLgKp=2182/T-0.0936LgT+0.000632T-1.0806@10-2T2-2.2967(2)T:,,,CO2.2.2CO+3H2=CH4+H2O+205.95kJ#kmol-1:Kp=PCH4#PH2O/(PCO#P3H2)(3)Kp:;PCH4PH2OPCOPH2:CH4H2OCOH2LgKp=9859.6/T-8.3636LgT+2.08@10-3T-1.8716@10-7T2+11.888(4)T:,,,COH2,,O2,:CH4H2COCO2H2SN2O2H2H2O1300e,4MPa,2000t#d-1,550t#d-1,O21920t#d-12.3COAspenPlus,,SEP,,(ASH)50%CO,CO,H2CO2,CO2CO,CO,,20091刘钧等:煤化工多联产系统中的煤气化过程模拟23,,,,,33COFig.3COconverterunit2.4(4)4Fig.4Lowtemperaturemethanolwashunit4,OUTGAS(AspenPlus,,,GASIFIERSEP),SEP(ASH),GAS1,GAS2,CO90%,GAS4,OUTSHIFT,CO95%-30~-60e,-40e,RadFrac200m3#h-1,:H296.3%,N20.57%,CO2.97%,CH40.03%,CO20.13%3(2,3)2Table2Off-gascompositionofgasifier/kmol#h-1H2O1110.061066.49N242.1141.56H22363.622284.34C00CO4083.654392.62CO2835.28791.34H2S46.6542.32CH43.842.02/e14001300/MPa443COTable3AnalogsimulationresultsforCOtransrormationandmethanolscubbing/kmol#h-1CO(GAS4)(LIQ-OUT)H2O313.0993.47N241.593.74H26237.7026.83C00CO439.2621.71CO24664.694874.26H2S42.3242.32CH42.020.54CH4O04958.20/e460-19.1/MPa454,2000t,:AspenPlus,2000t#d-1,,,2000t#d-1,,:H2O-3.9%,N2-1.3%,H2-3.4%,CO+7.6%,CO2-5.3%,[1],.[J].,2002,(6):3-7.[2],,,.Gibbs[J].,2004,(4):27-33.