维美德技术共享.pdf

1、From OCC to board and beyondTuomas PesonenPaper Technology Manager,Asia PacificValmetValmets holistic approach from OCC to boardStockpreparationBoardmachineBale pulpsBCTMPPlantOCCLineFiberlineChemicalcirculation&RecoveryCookingChipsChipsRecycledfibersKraftLinerboardCartonboardRecycledLinerboardMill

2、wide optimizationMill wide optimization Valmet|2nd ASEAN Pulp and Paper Summit,November,Vietnam2Challenge:Thorough understanding of raw material quality Valmet|2nd ASEAN Pulp and Paper Summit,November,Vietnam3TodayOnly nominal grade is knownRaw material variation causes variation in production050100

3、15045 kWh/tRaw material recipeOCC line energy consumptionMixed wasteOCCClippingsBoard machine Machine speed1428 m/minQuality targetOn-specProduction rate65 t/hMoisture7,1%Basis weight125 g/m2Breaks per day0,5Break00:30:24 agoBoard QualityYieldUptime last 7 days93%97%OCC production1558 tpdShort fiber

4、38%Long fiber62%Quality targetOn-spec2015SCTTimeQuality targetOn-specGradeSuperLiner125Turnup00:34:350500100015002000OCC production bdtpdSFLFSCTBurst Valmet|2nd ASEAN Pulp and Paper Summit,November,Vietnam4Accurate mass balance for maximizing yieldFiber QualityFiber lengthFibrillationCSFAshDirt cont

5、entIncoming raw material Mixed waste10%Moisture5%Plastics17%Ash content 8%LigninQuality targetOn-spec Valmet|2nd ASEAN Pulp and Paper Summit,November,Vietnam5Accurate mass balance for maximizing yieldConsistency measurementFiber quality measurementValmet Mill Wide OptimizationOCC plant mass balance

6、calculation Valmet|2nd ASEAN Pulp and Paper Summit,November,Vietnam6Model is put online to run in parallel with the physical processOCC Plant is modeled as flowsheetOCC Digital TwinReal time calculations for OCC Plant losses and yields05010015045 kWh/tRaw material recipeOCC line energy consumptionMi