锅炉汽包水位预测控制

:20021202:,(1969),,,8,(,210096)[],,,,[];;;;[]TK223.1+3[]A[]10023364(2003)11004504,,,,,,:,,,1H,W,D,1,122.1(2(a))PID,2(a)2.2(2(b)),21(2003(11)oz)3:H1(z-1)=h1(z-1)W(z-1)(1)H2(z-1)=h2D(z-1)(2)H3(z-1)=ki=-(W-D)(k)(3),:H=H1+H2+H3(4),,a,a(k+p)Hr,(H0):Hr=apH(k)+(1-ap)H0=(1-ap)(H0-H(k))+H(k)(5)(0a1),(k+p),,D,W()=W(k+1)==W(k+p),(k+p)(n)H1(k+p)=n-pi=1(h1(i+p)-h1(i))W(i)+h1(p)(W-W(k-1))+pi=1(h1(n)-h1(n-p+i))W(p+1-i)(6)H2(k+p)=n-pi=1(h2(i+p)-h2(i))D(i)+h2(p)(D(k)-D(k-1))+pi=1(h2(n)-h2(n-p+i))D(p+1-i)(7)H3(k+p)=pk1(W-D(k))(8)H(k+p)=H1(k+p)+H2(k+p)+H3(k+p)(9)e(k+p):e(k+p)=(Hr-H(k))-H(k+p)(10):J=e2(k+p)+r2(W-D(k))(11)(r)9J9(W-D)=0,W2(b)3,,,:T1=30s,k1=0.037,T2=15s,k2=3.6:r=0.11,a=0.5,p=5(),2s(,)3.1,W=0,D=0,H03(a)3(b)3(a),,,,,o{2003(11)3(b)3.2,H0=0,D=0,,4(a)4(b)4(a)4(b),0.06,0.42,,,,,,3.3,H0=0,W=0,5(a)5(b)5(a)5(b),,,,,,,3.4,,,(6):D=t(0t10),,,,2003(11)o|6(a)6(b)3.5,,2,2(7),,,,3.62,,4,,,;,,,7(a)7(b),,,4,,,,,,,,[][1],.[M].,2002.[2].[M].,1997.o}2003(11)flowdownwardandsoon.EXPERAMENTALSTUDYONFLOWFIELDBEHAVIORCONCERNINGTHECROSSEDJETFLOWSOFMICROSWIRLINGPRIMARYAIRASWELLASUPPERANDLOWERSECONDARYAIRZHAOKaietal(35)Throughtestcarriedoutonthecoldstatesimulationteststand,theinfluenceofsecondaryairfromrectangularjetorificeuponthedynamicbehavioroftheprimaryaircoalwaterslurryburner,whichhasacoaxialringtypejetflowcomposedofastraightflow(outerring)andaswirlingflow(innerring)oftheprecomustionchamber,hasbeenstudied.Testandanalysisshowthattheflowpatternofeveryjetflowinajetflowgrouphasverylargedifferencewiththatofasinglefreejetflowduetomutualmixingandaffectingeachotherofthesaidjetflows.STUDYONPRIMEVALTEANSFFERINGPHENOMENONINTHEFLUIDIZEDBEDTANGSongtaoetal(41)Basedonpyrolysisexperimentofproductsinthefluidizedbed,apeimevalanalysisofdataconcerningpressure,temperature,andshareofproducedgasinthefluidizedbedhasbeencarriedoutrespectively,havingbroughttolighttheprimevalphenomenonamongthem,andaconceptofprimevaltransferringphenomenonhasbeenintroducedaftercarryingoutcomparisonandanalysisofthethreesaidparameters.PREDICTIVECONTROLOFWATERLEVELINTHEBOILERDRUMZHAOChangxiangetal(45)Basedonthedynamicbehaviorofwaterlevelintheboilerdrum,apredictivecontrolschemeofwaterlevelinthedrumhasbeenputforward.Simulationtestshowsthatthesaidschemetobemoreapproachingtheidealeffectivenessthantheconventionalthreeimpulsecontrolscheme,andactuationofthevalveisstable,beinghelpfultolongtermeffectivecontrol.SIMULATIONSTUDYONFURNACETEMPERATURECONTROLBASEDONFUZZYCONTROLLERINPOWERPLANTOFBURNINGBLASTFURNACEGASJIADexiangetal(49)Inthermalpowerplantofburningblastfurnacegas,theinfluenceofblastfurnaceproductionupontheoperationofboilerwascomparativelylarge,makingthecombustioninsaidboilertobeveryunstable.ThecontrollingeffectivenessofPIDcontrollerscommonlyusedatpresentinsaidthermalpowerplantisntveryideal.Forthisreason,astudyonfurnacetemperaturecontrolbyusingfuzzycontrollerhasbeencarriedout.ThesimulationtestshowsthatthecontrollingeffectivenessoffuzzycontrollerisbetterthanthatofPIDcontroller.Atthesametime,theproblemsexistinginfuzzycontrollerforfurnacetemperaturecontrolofboilersandpossiblesolutionsthereofhavealsobeeninvestigated.CALCULATIONANDANALYSISOFVIBRATIONCHARACTERFORTHEENTIREFOUNDATIONGROUPSYSTEMOFAGASTURBINEGENERATORYOUGuoyingetal(51)Theinherentvibrationcharacteranddynamicresponseoftheentirefoundationgroupsystem(unitset+foundation+groundwork)foragasturbinegeneratersetinathermalpowerplanthavebeencalculatedandanal2ysedbyusingthefiniteelementmethod.Theresultsshowthatthedesignofaconcretefoundationforthesaidgasturbinegeneratorsetisresonable,satisfyingrequirementsofthedesignspecification.SIMULATIONANALYSISOFTHEVAPORIZINGPROCESSWITHCONSIDERINGNONUNIFORMDISTRIBUTIONOFRADIA2TIVEHEATFLOWZHUZhiwuetal(53)Simulationanalysisofthevaporizingprocessinrisertubesofaboilerhasbeencarriedoutonthebasisofaprocessingmethodwithconsideringnonuniformdistributionparametersofradiativeheatflow.Underconditionofthenonuniform3Ddistributionoffurnacetemperature,theradiativeheatflowtransferredtothesurfaceofwaterwalltubesisalsononuniform.Forthisreason,thewaterwallsurfacehasbeendividedintosmallsimulationzonesalongdirectionsofheightandwidthofrisertubes,andthevariationofthevaporizingprocesswithintherisertubesalongheightdirectionhasbeenanalysedbyusingtheabovementionedprocessingmethod.Theresultsobtainedaremorereasonablecomparedwiththatobtainedfromthetraditionallumpedparametersmethodandtheuniformradiativeheatflowdistributionmethod.Byusingtheresultsobtainedfromthesaidprocessingmethod,occurrenceofabnormaltubeswithworsenedheattransferlocalityandbackwardflowcanbedetermined,havingimportantsignificanceforanalysingsafeandeconomicoperationofboilers.CHARACTERISTICCALCULATIONANDANALYSISOFGASTURBINESDURINGTHETIMEOFBURNINGLOWCALORIFICVALUECOALGASBAIHuifengetal(58)Thethermodynamiccharacteristicsofgasturbinesduringthetimeofburninglowcalorificvaluecoalgashavebeenstudied,aquantitativecalculationofthethermodynamiccharacteristicsforsinglecycleandcombinedcyclebeingcarriedoutbyusingcomercialsolftwareGTPROimportedfromabroad,andtheenfluenceofadjustingtheflow