kp杨木漂白浆课程设计

年产30万吨漂白杨木KP浆制浆车间洗筛漂工段设计第1页共33制浆车间筛选漂白工段工艺流程设计说明书年产30万吨漂白杨木KP浆制浆车间洗筛漂工段工艺流程设计摘要杨木KP浆蒸煮后经DD洗浆机洗涤，先进入一段木聚糖酶的处理，然后进行中浓氧脱木素段,在氧脱木素前经过能较好地提高氧脱木素段的选择性和有效性的过氧酸预处理。氧脱出来后经除节筛，两段压力筛筛选、净化后进入D/Ep/P三段轻ECF漂白。，最终白度可达90%以上。出来的漂白浆可以直接成商品浆售出或送造纸车间抄纸。木聚糖酶可以降低杨木浆的卡伯值，杨木KP浆经氧脱木素,卡伯值降低48.1%。杨木浆在氧脱木素前用过氧酸预处理,脱木素程度分别达55.8%.氧化氯作为一种广谱、高效、无毒的消毒剂，本身性能柔和，不损伤纤维，漂白后的纸浆白度高，纸浆得率高。过氧氢强化的碱抽提中过氧化氢的使用可以使纸张白度显著提高。另一个明显的效果是，过氧化氢可以漂白浆料中的碎片。终段漂白采用H2O2漂白可改善浆料白度的稳定性。关键词：杨木KP浆；洗筛漂；DD洗浆机；氧脱木素；两段压力筛；二氧化氯漂白；ECF漂白年产30万吨漂白杨木KP浆制浆车间洗筛漂工段设计第2页共33ANANNUALOUTPUTOF300,000TONSOFBLEACHEDPULPPULPPLANTPOPLARKPWASHSIEVEDRIFTSECTIONPROCESSDESIGNABSTRACTPoplarKPpulpaftercookingbyDDwashedpulpwashingmachine,firstintotheprocessingsectionofxylanase,andthenthemediumconsistencyoxygendelignification,afteroxygendelignificationcanbetterimprovetheoxygendelignificationtheselectivityandeffectivenessoftheperoxyacidpretreatment.Knottersieveouttheoxygenoff,two-stagepressuresievescreeningpurifiedintoD/Ep/PthreesectionsoflightECFbleaching.Finalwhitenessofupto90%.Thebleachedpulpoutdirectlyintomarketpulpsoldorsendpapermakingworkshoppapermaking.XylanasecanreduceYoungKappanumberofthepulp,poplarKPslurrythroughoxygendelignification,thekappanumber48.1%reduction.Yangwoodpulpbeforeoxygendelignificationwithperaceticacidpretreatment,delignification55.8%,respectively.Chlorinemonoxideasabroad-spectrum,efficient,non-toxicdisinfectantitselfgentleperformance,withoutdamagingthefiberswhitenessbleachedpulp,thepulpishigh.Theuseofhydrogenperoxidecanbeenhancedalkaliextractionhydroperoxidewhitenessimprovedsignificantly.Anothersignificanteffectisthatthehydrogenperoxidecannotbebleachedintheslurrydebris.End-stagebleachingwithH2O2bleachedpulpbrightnessstabilitycanbeimproved.Keywords:PoplarKPpulp;Washsievedrift;DDwasher;Oxygendelignification;Two-stagepressurescreen;Chlorinedioxidebleaching;ECFbleaching年产30万吨漂白杨木KP浆制浆车间洗筛漂工段设计第3页共33目录1总论........................................................................................................................................41.1设计规模......................................................................................................................41.2产品种类与规格..........................................................................................................41.3产品质量标准..............................................................................................................41.4设计范围....................................................................................................................62工艺论证................................................................................................................................62.1生产工艺流程及说明..................................................................................................62.2洗涤工艺论证...............................................................................................................72.3筛选工艺论证..............................................................................................................82.4未漂浆及其漂白特性................................................................................................102.5漂白药品及其制备....................................................................................................112.6氧气脱木素及影响因素............................................................................................122.7各漂白段影响因素....................................................................................................163工艺参数和定额选取...........................................................................................................214主要设备选择.......................................................................................................................244.1洗浆设备的选择.........................................................................................................244.2筛选设备的选择........................................................................................................254.3净化设备的选择........................................................................................................274.4中浓浆泵的选择........................................................................................................284.5混合器的选择...........................................................................................................284.6漂白塔的选择............................................................................................................284.7洗浆设备的选择........................................................................................................294.8浆池选择....................................................................................................................324.9漂白药品制备设备的选择........................................................................................324.10设备一浆表..............................................................................................................33年产30万吨漂白杨木KP浆制浆车间洗筛漂工段设计第4页共331总论1.1设计规模年产30万吨漂白杨木KP浆，按一年生产340天计，日产880吨左右。1.2产品总类与规格产品种类：漂白杨木KP浆产品规格：漂白硫酸盐杨木浆A级品的要求(见表1),具有“高白度、高纯度、高强度、低尘埃”的品质,尤其是“低尘埃”的特性满足了生产电路板纸、绝缘纸