化工进展2017，Vol.36Issue(z1)：482-488,7.DOI:10.16085/j.issn.1000-6613.2017-0671
Mg2+对脱硫废水电解-电渗析过程的影响
Influence of magnesium ions on electrolysis-electrodialysis process of desulfurization wastewater
杨博 1李玉忠 1崔琳 1李广培 1董勇1
作者信息
- 1. 山东大学燃煤污染物减排国家工程实验室,山东 济南 250061
- 折叠
摘要
Abstract
Limestone-gypsum wet desulfurization process is the most widely used flue-gas desulfurization technology,this process produces a certain amount of desulfurization wastewater. The enrichment of Cl- included in desulfurization wastewater will increase the corrosivity of the slurry and they are difficult to be removed using conventional processing methods. The electrolysis-electrodialysis process is a promising recycling-treatment,but the Mg2+ included in desulfurization wastewater will influence reliable operation of the system. This paper adopted an electrolysis setup with three compartments and a pair of membranes and used a mixture of CaCl2 and MgCl2 at different concentrations of Mg2+ to simulate desulfurization wastewater, and proceeded to study the effect of Mg2+ during the electrolysis-electrodialysis process. Results show that the increase of the concentration of Mg2+ can make the electrolyte pH difficult to increase,increase the cell voltage and the energy consumption. When the concentration of Mg2+is more than 0.179mol/L,the desulfurization wastewater should be pretreated by chemical precipitation or other suitable methods before electrolysis to ensure reliable operation of the electrolysis-electrodialysis system.关键词
脱硫废水/电解/镁离子/离子交换/膜/电耗Key words
desulfurization waste water/electrolysis/magnesium ions/ion exchange/membranes/energy consumption分类
能源科技引用本文复制引用
杨博,李玉忠,崔琳,李广培,董勇..Mg2+对脱硫废水电解-电渗析过程的影响[J].化工进展,2017,36(z1):482-488,7.
