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1、Chapter1 TechnicalDevelopmentTendencyofPulpandPaperIndustry1.1GeneralDevelopmentTendencyofPaperScienceandTechnologyLargescale,Automation,Informationality,HighefficiencyOptimizedandsimplifiedprocesssystem,integrationandintelligenceofprocesscontrolReduceinvestmentandenergy
2、consumption,improveproductqualityanddecreaseproductioncostDevelopgreatlytotherecycledeconomyandcleanproduction,utilizeresourcesmoreefficiently,reduceenvironmentpollution,promotethesustainabledevelopmentofpaperindustry1.2DevelopmentTendencyofChemicalPulpingMainMethods:Kra
3、ftandSoda-AQMainProcesses:RDH,Super-Batch,EMCC,Lo-Solids,DDSPurposeachieved:HighefficientdelignificationGooddelignifyingselectivityLowenergyconsumptionLessenvironmentalimpactChemicalsused:NaOHNa2SAQPolysulfide(Na2Sn)MinorMethods:SP,AS,NS,AS-AQProductionscale:singleline1m
4、illiont/aofwoodpulp 3500t/dofwoodpulp 750t/dofbamboopulpNewTechnologies:Kvaerner－Compactcooking Dualoxtwo－stageoxygen delignification Andritz－Lo-Solidscooking Metso－SuperBatchcooking Oxytractwo-stageoxygen delignification1.3DevelopmentTendencyofMechanicalandChemimechanic
5、alPulpingProcessesused:TMPCTMPBCTMPAPMP,PRC-APMPCMP,Bio-CMPChemicalsused:Na2SO3NaOH,H2O2EnzymeChelatingagents:EDTA,DTPA,DTPMPAPurposeachieved:HighyieldGoodstrengthGoodbrightnessLowpollutionPRC－APMP•P－Preconditioning•RC－Refinerchemical•APMP－AlkalinePeroxideMechanicalPulpP
6、rojectsbuiltorbeingconstructed•HunanYueyang100000t/a•HenanPuyangLongfeng100000t/a XinxiangXinya100000t/a JiaozuoRuifeng150000t/a•NingxiaMeili100000t/aPRC－APMPQualityControllablepulpqualitywhichcanmeetthedemandofdifferentspeciesofpaperPoplarPRC－APMP:beatingdegree55－80ºSR（
7、SchopperRiegler）CanadianStandardFreeness（CSF）80-150mLBreakingLength>3200m（Max6000m）Brightness78－80％ISO（Max82％ISO）LightScatteringCoefficient45m2/kg（Max54m2/kg）Attheconditionofhighbreakinglength,keepinghighbulk,average2.2cm3/g,max3.0cm3/gLowcontentofshive,average0.1%1.4Dev
8、elopmentTendencyofPulpBleachingBleachingsequences:ForChemicalPulp:OQPDQPD(EOP)DOD(EO)P,OD(EP)D,OD(EOP)D
