Dryer section training July2009

《Dryer section training July2009》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、DryerapplicationtrainingJuly2009Goalsofthissession目标•Understand了解…–theroleofdryerfabricsinpapermaking干网在造纸生产中的作用–Basicconceptofthedryersection干燥部的基本理念RolesofaDryerFabric干网的作用•Ensureevenandefficientdrying确保均一有效的干燥–Helpmaximizetheheattransferprocess使传热最大化–Helpmaximizethemasst

2、ransferprocess使传质最大化•Conveythesheetwithmaximumstability以最大的稳定性传递纸页–Complementmachineelements纸机要素的补充–Properfabricdesignbyposition适当的干网设计•Driveelement(onnewermachines)驱动要素(在比较新的纸机上)DryerFabricPropertiesandRequirements干网的特性及对干网的要求易清洗网边校正稳定性抗水解能力热量传递颜色强度接缝支撑透气度远离网痕纸页的质量速度差（中心线）

3、空气动力牵引空气WATERREMOVALCO$TForming1.4Cents/TonFiberPressing1.9Cents/TonFiberDrying$22/TonFiberForming/PressingWaterManagement成形和压榨部水管理DryerSectionAirManagement干燥部空气管理DryerSectionSetUp干部配置TheBasicBlackBox黑匣子AIRAIR&H2O空气空气&水DRYERSECTIONPAPER纸页PAPER纸页WATER水分WATER水分干燥部STEAMCONDENS

4、ATEandSTEAM蒸汽ENERGY冷凝水和蒸汽DryerSection–Basiccomponents干燥部基本部件Exhaustfans–Ventilatethehumidair抽风机–排除潮湿空气AircurtainoverthehooddoorsSheetstabilizersPaperPaper纸幅稳定箱inoutDryerCylinders–HeatsupplyPocketVentilators–Airsupply烘缸–供热袋区吹风箱–供风DryerConfiguration干燥部构造•MultiCylinderDryerCon

5、figuration多烘缸干部构造•SingleRunorTopandBottomConfiguration单挂或上下群构造SingleRunTopandBottom单挂上下群TWOFACTORSEFFECTSTOMAXIMIZEDRYING两个因素影响着干燥效率的最大化•HeatTransfer:Fromsteamtocantosheet热量传递：从蒸汽到烘缸再到纸页•MassTransfer:Fromsheettopocketairtoexhaust质量传递：从纸页到袋区空气再排到外界HEATTRANSFER热量传递•KEYFABRICE

6、FFECTS关键的干网因素Fabrictension干网张力Fabriccontactarea干网接触面积DryingRatevs.FabricTension干燥速率vs干网张力干燥速率DryingRateFabricTension干网张力HeatTransfer热量传递Theinfluenceofdryerfabrictension,cylindertemperatureandmachinespeedonheattransfer.干网张力、烘缸温度和纸机速度对热量传递的影响260140C,4KN/M50140C,2KN/M100C,4KN/

7、M40100C,2KN/M3020TransferredEnergykJ/m1004006008001000120014001600Machinespeedm/min纸机车速Figure3NewProcessingTechniques新生产工艺•Stretchresistance拉伸阻力•Narrowingresistance收缩阻力•Maintainstability&tensiondistribution维持稳定性&张力分布•Heatsetbyexceedingallconditions(tension&temperature)thatc

8、ouldbeencounteredonapapermachinesothefabricwillnotreactwhileitruns干网通过在远超造纸机器上的张力和