蔗渣的热水抽提和碱法制浆  

Hot-water Extraction and Soda Pulping of Bagasse

作　　者：雷以超[1] 刘世界[1,2] 吴渊[1] 刘站[1] 黎姜[1] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640 [2]美国纽约州立大学环境科学与森林学院,美国纽约13210

出　　处：《中国造纸》2009年第7期73-75,共3页China Pulp & Paper

基　　金：华南理工大学制浆造纸工程国家重点实验室自主研究课题;华南理工大学森工造纸大学生创新能力培养基地资助

摘　　要：蔗渣在160℃下保温30min进行热水抽提或预水解处理,可以溶解15%左右的物质。经热水抽提后的蔗渣在降低用碱量约15%(从18.9%降到16.0%)的情况下进行碱法蒸煮,可降低蒸煮后浆料的卡伯值约16%(卡伯值从13.1降到11.0),而且浆料黏度提高。在相同的卡伯因子情况下进行ECF漂白,生产漂白浆可以节省二氧化氯约20%,而且纸浆的白度明显提高(从77.6%提高到83.7%),从而达到减少排放和降低化学药品消耗的目的。Bagasse was subjected to hot-water extraction （or prehydrolsis） at 160℃ for 30 minutes, which resulted in about 15% mass-removal. Compared to the untreated bagasse, alkali charge of prehydrolyzed bagasse cooking can reduce from 18.9% to 16.0%, while the kappa number of the resultant pulp reduce from 13.1 to 11.0 and pulp viscosity increases. ECF bleaching process was applied to the pulps produced from prehydrolyzed bagasse and untreated bagasse. At the same kappa factor, prehydrolysis of bagasse can reduce ClO2 demand by almost 20% while the brightness of the bleached pulp increases significantly. Bagasse prehydrolysis or hot-water extraction before soda pulping can reduce effluent discharge and reduce chemical demand.

关 键 词：蔗渣 热水抽提 预水解 碱法制浆 ECF漂白 

分 类 号：TS743.11[轻工技术与工程—制浆造纸工程]