Evaluating Process of Auto-Hydrolysis Prior to Kraft Pulping on Production of Chemical Pulp for End Used Paper-Grade Products
Evaluating Process of Auto-Hydrolysis Prior to Kraft Pulping on Production of Chemical Pulp for End Used Paper-Grade Products
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DOI：
10.1016/j.jobab.2022.05.002
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发表时间：
2022-05
影响因子：
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通讯作者：
Wenchao Jia;Miaofang Zhou;Chenfeng Yang;He Zhang;Meihong Niu;Haiqiang Shi
中科院分区：
文献类型：
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作者：
Wenchao Jia;Miaofang Zhou;Chenfeng Yang;He Zhang;Meihong Niu;Haiqiang Shi
本工作的目的是系统地评估基于水解的硫酸盐法制浆工艺的性能以及相关的纸浆和黑液特性。对相思木进行不同强度的自水解，然后进行硫酸盐法制浆。结果表明，随着自水解度的增加，纸浆得率明显下降。当P因子为1000时，筛浆中戊聚糖的去除率可达98.6%。纤维长度、细度和卷曲度不受自水解处理的影响。自水解浆在磨浆过程中会恶化纸浆的原纤化和打浆反应。打浆处理后纤维长度和细度变化明显。自水解后，纸浆纤维表面出现颗粒状物质，纸浆基质的抗张指数下降，黑液的固形物和有机物含量提高。
The objective of this work is to systematically evaluate the performance of the hydrolysis-based kraft pulping process and associated pulp and black liquor characteristics. Acacia wood chips were auto-hydrolyzed under various severities, then the hydrolyzed wood chips were kraft pulping. The results indicated that the yield of pulp significantly dropped with intensifying the auto-hydrolysis severity. Meanwhile, the removal rate of pentosan reached 98.6% in the screened pulp at the P-factor of 1 000. The fiber length, fines and fiber crimp of the screened pulp were not affected by the auto-hydrolysis treatment. Auto-hydrolyzed pulps deteriorated fibrillation and beating response of the pulp in a refining process. However, fiber length and fines changed obviously after beating treatment. After auto-hydrolysis, the tensile index of the paper matrices decreased, some particle substances were found on the surface of the pulp fiber, and the solid and organic content of the black liquor were improved.