Recycle cooking wood chips with the residue liquid removed out of lignin by calcification for increasing pulp yield and reducing waste water discharge
Recycle cooking wood chips with the residue liquid removed out of lignin by calcification for increasing pulp yield and reducing waste water discharge
复制标题
将蒸煮木片与木质素钙化除去的残液回收利用，提高纸浆得率，减少废水排放
DOI：
10.1016/j.jclepro.2020.124028
复制
发表时间：
2020-12-20
影响因子：
11.1
通讯作者：
Li, Xiu-rong
中科院分区：
文献类型：
--
作者：
Nong, Guang-zai;Xing, De-yue;Li, Xiu-rong
化学机械浆生产过程中会产生大量的低浓度废水。由于浓度低，蒸发制备其浓缩液供燃烧需要消耗大量能量；蒸发-燃烧法处理废液成本较高。针对这一问题，开发了一种直接钙化反应处理化学机械制浆废液的新方法，将处理后的废液中的木质素脱除并生成氢氧化钠，用于回收蒸煮木片；从而提高纸浆得率，减少废水排放。循环蒸煮的出浆率在86.7%-90.59%之间，比不处理渣液的初始蒸煮提高9.6%-13.3%。本发明采用回收蒸煮木片技术的造型浆厂蒸煮磨粉废液减少了90.6%。 (C) 2020 Elsevier Ltd. 保留所有权利。
A large amount of low-concentration wastewater is produced during the production of chemical mechanical pulp. Due to low concentration, a large amount of energy is consumed by evaporation to prepare its concentrated liquor for combustion; resulting high cost in treating the waste liquor by the evaporation-combustion method. In order to solve this problem, a new method to treat chemical mechanical pulping waste liquor by directly calcification reaction is developed to remove out of lignin and generate sodium hydroxide in the treated residue liquid for recycle cooking wood chips; and thereby to improve the pulp yield and reduce waste water discharge. The pulp yields by recycle cooking are in the range of 86.7%-90.59%, being 9.6%-13.3% higher than that of the initiate cooking without the treated residue liquid. By the method, it reduces 90.6% of the cooking and milling waste liquor in the modeling pulp mill applying the recycle cooking wood chips technology. (C) 2020 Elsevier Ltd. All rights reserved.