中南工业大学学报(自然科学版)2001，Vol.32Issue(2)：150-153,4.
隔膜电解法处理草浆黑液
The treatment of black liquor from straw pulp by electrolytic process
盛利元 1侯曼玲 2许秀兰 2宋鸽2
作者信息
- 1. 中南大学应用物理与热能工程系,
- 2. 中南大学化学化工学院,
- 折叠
摘要
Abstract
Experimental study of feasibility on black liquor from straw pulp by electrolytic process has been carried out. The cast iron is used as anode and graphite electrode as cathode in the experiments. Electrolytic vessel is separated into both cells of anode and cathode with porous filtration membrane. There are reactions of oxidation and hydrolysis of Fe and substitution of alkaline lignin in the anode, and there is hydrogen evolution reaction on the cathode. H2O and Na+ move from the anode into the cathode through the membrane with the action of potential energy, and only lignin is left over in the anode. The process can make lignin separated from alkaline solution when black liquor is poured into the anode and alkaline solution is taken out from the cathode continually. The removal rate of colourity, SS and COD of black liquor can reach 66.4%, 75.3% and 94% respectively, and alkali recovery can be up to 94% at normal temperature and in treatment conditions (I=1 A, V=8 V, t=12 h). The experiments show that electrolytic process can be replanted onto pulping processes easily as a practical technique of alkali recovery and maybe is a new way of treating black liquor from straw pulp.关键词
草浆黑液/电解法/碱回收分类
资源环境引用本文复制引用
盛利元,侯曼玲,许秀兰,宋鸽..隔膜电解法处理草浆黑液[J].中南工业大学学报(自然科学版),2001,32(2):150-153,4.
