燃煤工业锅炉湿式旋流烟气脱硫装置的数值模拟法优化设计

:2000-09-11:(1969-),,,.:1001-2060(2001)06-0653-04燃煤工业锅炉湿式旋流烟气脱硫装置的数值模拟法优化设计仇中柱,徐吉浣,张鹤声(同济大学热能工程系,上海200092):利用-双方程模型对湿式旋流烟气脱硫装置涡核区速度场和压力场进行了数值模拟,同时利用单颗粒动力学模型模拟了液滴在气流场中的运动,用数值模拟方法确定了旋流装置的结构参数,实现了湿式旋流烟气脱硫的优化设计,降低了实验费用,减少了实验工作量:;;;:X701.3:B11,:,,,,,,,,,,,,,,(()(N)(H)(D)),,21-;2-;3-;4-;5-;6-;7-;8-;9-图1湿式旋流烟气脱硫装置示意图2.1,,,:(1),;(2),;(3),,-:x(!vx∀)+1rr(r!vr∀)+1r#(r!v#∀)=x∃∀∀x+1rrr∃∀∀r+r#∃∀r∀#+S∀(1),∀(1,v#,vr,vx),∃∀,S∀[5];x,r,#;vx,vr,v#2.216(96)200111,,,;,,:(1),;(2);(3),,;(4);(5),:mpdvpdt=%Fp+mpg(2),mp,vp,%Fp,mpg,::dv#,pdt=1&(v#-v#,p)(3a):dvr,pdt=-1&(vr-vr,p)+v#,p2r(3b):dvx,pdt=1&(vr-vx,p)-9!807(3c),&=24!pdp218∋CDRep;Rep=dp|v-vp|v;!pdp;v#,vr,vx;v#,p,vr,p,vx,p;v,vp;CD,CD[3]:Rep1,CD=24Rep;1Rep1000,CD=1+Rep23624Rep;Rep!1000,CD=0!443:=5N=18H=230mmD=350mm3.1,,(),v#=V∀cos,vr=V∀sin(V∀)k()0!5(v2x+v2r+v2#),=CDk32/l,l=(D+H)/2,,(r=0),,,:vr=0;∀/r=0(∀=vx,v#,,),,,:∀/x=0(∀=vx,vr,v#,,),t=70#,!=1!0kg/m3;∋=2!409∃10-5kg/(ms)图2网格划分图,36,10,10,2SIMPLE[5],,(():(=Pin-Pout!Vm2/2(4),PinPout;Vm6542001图5局部阻力系数的计算值与实验值图6气体带水量的计算值与实验值(碱液量保持不变为1500L/h)(气体流量保持不变为2900m3/h)3.2图3液滴运动示意图,,(2)3,i,,)t1E1,,)t2图4液滴在涡核区气流场中的运动轨迹E2,Rung∀Kutta,,,,4,,35∋m[6],n(lndp)=N0ln∗m2+exp-12lndp-lndmln∗m2(5),dp;dm;∗m;N0G=+6V%10i=1%lndpi&n(lndp)dp3!d(lndp)(6)i;!;dpii,;V3.3,U,,(4),,564,:∋()(N)(H)(D),,(1)[7],(676)6556,:,,(2),,(),(3),,(4),(5),,,,:[1].[M].:,1992.[2].[M].:,1991.[3].[M].:,1980.(辉编辑)(655)34=8181,,,,9,1/(∗)357N/151821H/mm180230280D/mm250350420,C,,,,SO2,,,+,,2900m3/h,1500L/h,,81,=3∗N=21H=180mmD=250mm,203!9∃10-3kg/m3,,0!301,=3∗N=21H=180mmD=250mm5,-,,,:[1].[M].:,1985.[2]S.V.[M].:,1984.[3].[M].:,1994.[4].[D].:,1997.[5].[M].:,1988.[6].[D].:,1999.[7].[M].:,1977.(辉编辑)6762001CirculatingFluidizedBedBoilerFurnacebyUtilizingaMonteCarloMethod[,]/SUNYong∀li,HEYu∀rong,LUHui∀lin(ThermalEnergyEngineeringDepartment,HarbinInstituteofTechnology,Harbin,China,PostCode:150001),TANXiu(ElectricPowerScientificResearchInstituteofJilinProvince,Changchun,China,PostCode:130021)//JournalofEngineeringforThermalEnergy&Power.-2001,16(6)-650~652Anumericalstudywasconductedoftheheattransferinacirculatingfluidizedbedboilerfurnace.Therelevantmodelbe∀ingsetuptakesintoaccounttheinfluenceoftheconcentrationdistributionofaxialandradialparticles.Thecalculationofthemodelrevealsthedistributionvariationoffluegasconcentrationandheatfluxdensitywithinthefurnace.Theresultsofthecalculationindicatethatintheheattransfercalculationofacirculatingfluidizedbedboilerfurnacetheconvectionheattransferofparticlephaseshouldnotbeneglected.Keywords:circulatingfluidizedbedboiler,heattransfer,MonteCarlomethod=OptimizedDesignofaNumericalSimulationMethodfortheVortexDesulfurizationDeviceofWetFlueGasesofaCoal∀firedIndustrialBoiler[,]/QIUZhong∀zhu,XUJi∀huan,ZHANGHe∀sheng(ThermalEnergyEngineeringDepartment,TongjiUniversity,Shanghai,China,PostCode:200092)//JournalofEngineeringforThermalEnergy&Power.-2001,16(6)-653~655,676Throughtheuseofak∀dualequationmodelanumericalsimulationwasconductedofthevortexareaspeedandpressurefieldofavortexwetgasdesulfurizationdevice.Meanwhile,withthehelpofasingle∀particledynamicmodelthemove∀mentofliquiddropsinthegasflowfieldwassimulated,andbyutilizingthenumericalsimulationmethodthestructuralparametersoftheabove∀mentionedvortexdeviceweredetermined.Asaresult,theoptimizeddesignofthevortexwetgasdesulfurizationwasrealized,contributingtoareductionoftestexpensesandadecreaseinexperimentalworkload.Keywords:desulfurizationdevice,vortexarea,numericalsimulation,structuralparameter=TheDevelopmentofaControlandMonitoringSystemforaNavalSteamPowerPlant[,]/LILai∀chun,LIUFan∀ming,etal(HarbinNo.703ResearchInstitute,Harbin,China,PostCode:150036)//JournalofEngineeringforThermalEnergy&Power.-2001,16(6)-656~658,674Duetoitscomplicatedsystem,thepresenceofmanyequipmentitemsandthelargequantityofneededcontrolparametersasteampowerplanthasamajorityofitscontrolledobjectsnotliabletoberepresentedbysimplemathematicalmodels.Duringtheoperationoftheplantmanyparametersareinterrelatedandinvolvedinacomplicatedcoupledrelationship.Numerouscontrolledparameterscannotmeetusagerequirementsifasingleloopcontrolisemployed.Moreover,anavalsteampropulsionplantfeaturesahighfrequencyofloadchangesandawiderangeofsuchchanges,resultinginacontrolsystem,theimplementationofwhichdemandssophisticatedtechnicalskills.Inlightoftheabovetheauthorspresentthecompositionandfunctionsofacentralizedcontrolandmonitoringsystemforanavalsteampropulsionplantalongwithsomeinnovativeapproachesofthatsystem.Keywords:navalvessel,steampowerplant,automaticcontrol=AnAnalysisoftheCauseofaSteamTurbineShaftSealLeakageandItsTreatment[,]/ZhangShao∀bo(CixiThermalPowerPlant,Cixi,ZhejiangProvince,China,PostCode:315300)//JournalofEngineeringforThermalEnergy&Power.-2001,16(6)-659~660Afterananalysisofthesymptomsofshaftsealleakageandotherabnormalconditionsdetectedduringtheoverhaulofasteamturbinetherootcauseoftheleakagewasidentifiedandaneconomic,simplifiedandeffectivemethodproposedforitsresolution.Keywords:steamturbine,shaftseal,leakagerate,problemsolving=ImprovementandAdvancementofanAxialTypeSeparatorofCoar