常温条件下赤泥同时脱硫脱硝实验研究  

Experimental study on simultaneous desulfurization and denitrification of red mud at low temperature

作　　者：赵昂然 韩永强 王志鹏[1] 李鹏飞[2] 许亚伟 佟会玲[1] ZHAO Angran;HAN Yongqiang;WANG Zhipeng;LI Pengfei;XU Yawei;TONG Huiling(Department of Energy and Power Engineering,Tsinghua University,Beijing 100084,China;Central Research Institute of Building and Construction Co.,Ltd,Mcc Group,Beijing 100088,China)

机构地区：[1]清华大学能源与动力工程系,北京100084 [2]中冶建筑研究总院有限公司,北京100088

出　　处：《化工学报》2024年第S01期276-282,共7页CIESC Journal

基　　金：华能集团总部科技项目“基础能源科技研究专项(二)”(HNKJ21-H31)。

摘　　要：采用固定床反应器研究了赤泥在110℃条件下的同时脱硫脱硝反应性能,以及水蒸气浓度和硫硝比对其的影响。采用氮气吸附仪、pH计、电导率计、激光粒度分析仪和电感耦合等离子体质谱仪等分析手段测试了赤泥的物理性质和化学组成。实验结果表明,赤泥的脱硝效率是Ca(OH)2的2.4倍;反应气体中NO含量对SO_(2)的脱除影响只有不到15%,而硫硝比接近5时,NO的脱除率接近100%;水蒸气的影响存在10%附近的最佳范围,浓度过高会影响前期NO的转化及脱除,但有利于后期的脱硫脱硝效果。赤泥中脱硫脱硝的有效组分包括碱性成分和金属氧化物。A fixed-bed reactor was used to study the simultaneous desulfurization and denitrification of red mud at 110℃,as well as the effects of water vapor concentration and SO_(2)to NO ratio.The physical properties and chemical composition of red mud were measured by BET(Brunauer Emmet Teller)surface area and porosity analyzer,pH meter,laser particle size analyzer(LDSA)and ICP(inductivity coupled plasma mass spectrometry).The experimental results showed that the denitrification efficiency of red mud was 2.4 times that of Ca(OH)2.The effect of NO content in the reaction gas on the removal of SO_(2)was less than 15%.When the SO_(2)to NO ratio approached 5,the removal efficiency of NO nearly approached 100%.The optimal range for the effect of water vapor was around 10%.When the water vapor concentration was too high,the conversion and removal of NO can be affected in the early stage,while the desulfurization and denitrification in the later stage were promoted.The effective components for desulfurization and denitrification in red mud mainly included alkaline components and metal oxides.

关 键 词：废物处理 吸收 固定床 同时脱硫脱硝 赤泥 气固反应 

分 类 号：X758[环境科学与工程—环境工程]