文献类型：会议论文

英文题名：BLEACH FILTRATE RECYCLE IN BLEACHING FOR EUCALYPTUS CHEMIMECHANICAL PULPS

作者：Shen Kuizhong[1] Fang Guigan[1] Hu Jianmin[1] Jin Li[1] Liang Fangmin[1] Han Shanming[1]

第一作者：沈葵忠

通信作者：Shen, KZ[1]

机构：[1]Chinese Acad Forest, Inst Chem Ind Forest Prod, Nanjing 210042, Peoples R China

会议论文集：International Symposium on Emerging Technologies of Pulping and Papermaking

会议日期：NOV 08-10, 2010

会议地点：Guangzhou, PEOPLES R CHINA

语种：英文

外文关键词：eucalyptus; chemimechanical pulping; hydrogen peroxide bleaching; bleach filtrate recycle

年份：2010

摘要：The eucalyptus wood chips are already used on a large scale to produce chemimechanical pulps (CMPs) by many Chinese pulp mills. The bleach filtrate recycling in bleaching for eucalyptus CMPs was investigated. The CMPs used in the experiments have good bleaching responses to hydrogen peroxide with a brightness of more than 80% ISO at a H(2)O(2) charge of 2%. A positive effect to the pulps brightness, a brightness increase of 0.3 points, is observed of recycling the bleach filtrate once. No obvious negative effect is observed by using multi-time recycling of the filtrate. Compared with that of control bleaching, pulp brightness suffers only a brightness loss of 0.3 points after recycling seven times. The filtrate characters of COD, electrical conductivity, etc, increase gradually with the recycling times at the beginning and level off after five times. The bleach filtrate recycling in bleaching of eucalyptus CMPs can be expected to save 50% of processing fresh water, and 50% of Na(2)SiO(3) and 50% of DTPA without observed negative effects on bleaching efficiency and pulp strength properties.