kp杨木漂白浆课程设计.docx

编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第页共NUMPAGES33页第PAGE\*MERGEFORMAT33页共NUMPAGES\*MERGEFORMAT33页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Anannualoutputof300,000tonsofbleachedpulppulpplantpoplarKPwashsievedriftsectionprocessdesignAbstractPoplarKPpulpaftercookingbyDDwashedpulpwashingmachine,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-stagebleachingwithH2O2bleachedpulpbrightnessstability