美卓自动化-湿部控制方案

©Metso1ActiveWetEndManagementandPaperQualitymanagementHeikkiKumpulainenBusinessManager,WetEndMeasurements©MetsoOverviewofthepresentation-TheroleofWetEndmeasurements-RefinerControlskajaaniMAP-WetendstabilityandControlconceptkajaaniWEMandkajaaniRM3WhitewaterconsistencycontrolChargeor(cat)ionicdemandcontrol2©Metso3StabilizingtheWetEndTheKeytoGoodGualityandRunnabilityBythetimeitgetstothemachine,itisoftentoolateThebiggestopportunitiestoimprovepapermachineoperationsareoftenbeforethemachineitself.BasicsheetpropertiesaresetRemovethewater©MetsoRetentionFormationDrainageKeyvariablesFibersFillersFinesDissolved&ColloidalmaterialFurnishPaperRecordsItsHistory4RetentionaidFixingagentChemicalsQualityRunnabilityMajorpartofendproductqualityandmachinerunnabilityaresetbeforeheadbox.Processbeforethemachineisimportant!Keyvariablesarewaterremovalinformingsection,webformationandfinesandashretentionControlofFiller,FinesandChemistry©MetsoLeadingto-Stablesheetstructureformation-Improvedrunnability-BetterprofilesWetEndManagement5ControllingtheMassBalanceandChemistryattheareawheresheetpropertiesareset.Freshfiller-0.3kg/sRetentionaidHeadbox7.3kg/s:-5,8kg/sfiber-1,5kg/sfillerWhiteWater3,3kg/s:-2,4kg/sfiber-0,9kg/sfillerPaper4,0kg/s:-3,4kg/sfiber-0,6kg/sfillerToLongCirculation1,0kg/s:-0,7kg/sfiber-0,3kg/sfillerThickStock4,7kg/s:-4,1kg/sfiber-0,6kg/sfillerLessVariationstoshortcirculationLessVariationstolongcirculationSlide5pvi3trevirtapa,2008-4-18©Metso6Date/Title/AuthorTheCostofInstabilityQualityMuchvariabilitytoofasttocontrolfromthedryendscanner-BothMDandCDareaffectedVariability,%ProcessControlProcessDesignFibreFlocculationScannerScannerItmustbecontrolledatthewetend-WetendsensorsandcontrolsNeedtointegratewetendanddryendcontrolsMultivariableControlWhitewaterCsCationicdemandWhitewaterCsCationicdemandThickstockTotalCsThickstockTotalCs©Metso7ContinuousMeasurements–ToolsforWetEndManagementTotalConsistencyAshConsistencyFlocculationTotalRetentionAshRetention1100installationsChargeDemandBasicChemistryRetentionTurbidity160installationsFreeness(T227)FiberPropertiesForrefinercontrol700installationswith2300samplepointsKajaaniConsistencykajaaniRM3kajaaniWEMkajaaniMAPConsistencykajaaniMCAmicrowave4000installationsvalmetSPshareforce;bladeover50000inst.kajaaniROTARYshareforce700installationskajaaniMAPFreenessandSRRefinerControl©Metso9Date/Title/AuthorkajaaniMAPforRefiningControlOn-linefreenessorSRforControlApplications-freeness;AccuracyaccordingtoTAPPIstandardT227OM-94-Newmeasurementevery3…4minFiberpropertiesandshivecontentmeasurement-Automatedself-cleaningMaintenanceinterval1monthModular,expandableaccordingtocustomerneedsUpto20automatedsamplersatupto100mdistance-measuresalsomanualsamples©MetsoAutomaticcleaningOFFFreenessWaterfreenessWaterfreeness-tomeasuredevicecleanlinessFreenessAutomaticcleaningONAutomaticallyDetectedMeasurementValidityandInstrumentConditionInstrumentcleanlinessWaterqualityAutomaticcleaningONAutomaticcleaningOFF©MetsoPrincipleofSRcontrolloop+SECCorrectionPulptoRefinerskajaaniMCAConsistencySR°SetpointfromOperatorControllerPulpfromRefinersMeasuredFreenessorSR°kajaaniMAPSECSetpointfromOperatorSECSetpointselectionSECControllerLoopSampletoanalyzerSEC=SpecificEnergyConsumption1111©Metso02040608010012021.022.022.923.924.925.826.827.828.8oSRFrequencyoSRFrequencyoriginalNewoSRFrequencywithimprovedcontrolscorrectedSRlevelBenefitsofSR(CSF)controlRefiningresultintargetOptimizedrefiningenergyImproveswaterremovalORincreasedmachinespeed(waterremovalbottleneck)ORincreasedmachinespeed(waterremovalbottleneck)ReducedSteamusageindryingReducedSteamusageindryingIncreasedrycontentofthewebinthepresssectionIncreasedrycontentofthewebinthepresssectionCurtaileddrainagetimeCurtaileddrainagetimeLowerenergyconsumptioninrefiningLowerenergyconsumptioninrefiningIncreasedFreenessIncreasedFreenessDecreasedSRBettercontrol,LessVariationsBettercontrol,LessVariationsMorestablequalityBetterrunnabilityRawmaterialsavingsFastergradechanges/startups12kajaaniRM3:Allabouttotal&ashCsmanagement©Metso14Kajaani™WetEndSolutionskajaaniLC-100kajaaniRM-200CkajaaniRM-200MkajaaniCATikajaaniFSD100kajaaniWEM,kajaaniRM3kajaaniRMikajaaniCATiMultilineOverallchargecontrolDecoupledash&retentioncontrolThe1steverretentioncontrolThickstockashcontrolPaperashcontrolduringwebbreakMPCforthewetendIQWetEndMDRTDisinitiatedoncustomerneeds!©Metso15kajaaniRM3,theWetEndSensorTotalandtrueashconsistencymeasurement-0-2%totalconsistency-0-1%fillerconsistencyOpticalmeasurementprinciple-LaserandLEDContinuousmeasurementsofonesampleline-SuitableforallpulptypesRealtimemonitoringofwetendconsistencyandretentionIdealforautomaticcontrolapplications©Metso16KeyFeaturesoftheMeasurementSimplebasicconstruction-continuouson-linemeasurement-optionalmodulesavailablefortrouble-freeinstallationLatestTechnologylightsources:laserandLEDFlatsapphireglassesareusedinmeasurementcell-extremelystrong-improvedopticalperformanceAbsorbentinsidetheopticalmodulepreventscondensationEasyandimprovedcalibrationBesta