碱性亚硫酸钠解决氯气二次污染的工艺研究  

Process research on the removal of second chlorine gas pollution by an industrial sodium sulfite waste

作　　者：郭效瑛[1,2] 祁米香 刘建国[3] 杨占寿 李波[1] 童秀萍[1] GUO Xiao-ying;QI Mi-xiang;LIU Jian-guo;YANG Zhan-shou;LI Bo;TONG Xiu-ping(Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining 810008,Qinghai Province,China;College of Chemistry&Environment Engineering,Baise University,Baise 533000,Guangxi,China;Jinchuan Group Co.,Jinchang 710034,Gansu Province,China)

机构地区：[1]中国科学院青海盐湖研究所盐湖资源综合高效利用重点实验室,青海西宁810008 [2]百色学院化工与环境工程学院,广西百色533000 [3]金川集团公司,甘肃金昌737104

出　　处：《化学工程》2020年第1期7-11,46,共6页Chemical Engineering(China)

基　　金：青海省基础研究计划项目资助(2016-ZJ-786,2016-ZJ-758)

摘　　要：工业上一般采用氢氧化钠或氢氧化钙溶液吸收含氯废气,生成的次氯酸钠或次氯酸钙不稳定,容易再次释放出二次氯气污染。文中采用模拟的碱性亚硫酸钠生产废液还原吸收氯气,检测吸收后的气体是否出现氯气报警,分析吸收尾液中的次氯酸根,来检测吸收的效果和吸收尾液的化学稳定性,研究了不同氢氧化钠与亚硫酸钠摩尔配比下的氯气吸收后的氯离子、硫酸钠以及残余的亚硫酸根、次氯酸根质量浓度。结果表明:碱性亚硫酸钠废液吸收后的尾液中不再含有次氯酸根,有效地避免二次氯气污染的产生,实现了以废治废的目的。In industries,sodium hydroxide or calcium hypochlorite solution is generally used to absorb chlorine-containing waste gas,besides the bad economics,the generated sodium hypochlorite or calcium hypochlorite is unstable to easily decompose and release secondary chlorine pollution.In this paper,the filtration stock liquor in sodium sulfite production process was used to reduce and absorb chlorine gas,with chlorine gas alarm as the signals of the solution′s chlorine absorption capability using-out.The hypochlorous acid ion in the absorption tail liquid was analyzed to detect the chemical stability.The results show that the liquor absorbed by alkaline sodium sulfite doesn′t contain hypochlorous acid ions any longer,thus the generation of secondary chlorine pollution is effectively avoided.In this way the purpose of treating waste with another waste could be realized.

关 键 词：二次氯气污染 工业废液 亚硫酸钠 次氯酸根 以废治废 

分 类 号：X592[环境科学与工程—环境工程]