摘要
针对燃气锅炉烟气氮氧化物超标排放,研究了NaClO_(2)湿法氧化脱硝的工艺条件,分析了NaClO_(2)浓度、pH、溶液温度及空塔气速对脱硝效率的影响。在此基础之上,基于响应曲面法进行试验设计,以NO_(x)去除率为响应值,建立了工艺影响因素与响应值之间的数学模型,分析了影响因素间的交互作用。结果表明,NaClO_(2)质量浓度、pH和空塔气速对NO_(x)去除率影响显著(P<0.05),NaClO_(2)质量浓度与pH、空塔气速与pH均存在显著的交互作用(P<0.05)。响应曲面优化后的最佳工艺条件为NaClO_(2)质量浓度为1.2 g/L、溶液pH为5.02、反应温度为59.86℃及空塔气速为1.01 L/min。
In view of the excessive emission of nitrogen oxides from flue gas of gas-fired boiler,the process conditions of NaClO_(2)wet oxidation denitration were studied.The effects of NaClO_(2)concentration,pH,solution temperature and empty tower gas velocity on the denitration rate in NaClO_(2)wet oxidation denitration process were studied.The response surface method was used for the experimental design.Taking the NO_(x)removal rate as the response value,the mathematical model between the factors and the response value was established,and the interaction among the influencing factors was analyzed.The results showed that NaClO_(2)mass concentration,pH and empty tower gas velocity had significant effects on NO_(x)removal rate(P<0.05),and there was significant interaction between NaClO_(2)mass concentration and pH,as well as between pH and empty tower gas velocity(P<0.05).The optimized process conditions were that the mass concentration of NaClO_(2)was 1.2 g/L,the pH of the solution was 5.02,the reaction temperature was 59.86℃,and the empty tower gas velocity was 1.01 L/min.
作者
钱莉莉
周慧敏
朱梦钰
夏逢婕
朱承驻
QIAN Li-li;ZHOU Hui-min;ZHU Meng-yu;XIA Feng-jie;ZHU Cheng-zhu(School of Resources and Environmental Engineering,Hefei University of Technology,Hefei230009,China;Institute of Atmospheric Environment&Pollution Control,Hefei University of Technology,Hefei230009,China;Key Laboratory of Nanominerals and Pollution Control of Anhui Higher Education Institutes,Hefei University of Technology,Hefei230009,China)
出处
《湖北农业科学》
2023年第1期71-76,共6页
Hubei Agricultural Sciences
基金
安徽省科技重大专项(201903a07020023
201903b06020016)。
