SO_(2)对改性活性炭吸附烧结烟气中NO的影响  

Effect of SO_(2)on adsorption of NO from sintering flue gas by modified activated carbon

作　　者：蔡建宇[1] 彭兆丰 宋丽云[1] 侯环宇 李坚[1] Cai Jianyu;Peng Zhaofeng;Song Liyun;Hou Huanyu;Li Jian(Key Laboratory of Beijing on Regional Air Pollution Control,Beijing University of Technology,Beijing 100124,China;HBIS Company Limited,Shijiazhuang 050023,Hebei,China;HBIS Steel Technology Research Institute,Shijiazhuang 050023,Hebei,China)

机构地区：[1]北京工业大学区域大气复合污染防治北京市重点实验室,北京100124 [2]河钢股份有限公司,河北石家庄050023 [3]河钢集团钢研总院,河北石家庄050023

出　　处：《钢铁钒钛》2021年第4期73-78,共6页Iron Steel Vanadium Titanium

基　　金：国家重点研发计划(No.2017YFC0210302)。

摘　　要：为探究SO_(2)对改性活性炭吸附法去除烧结烟气中NO效果的影响,减少NOx的排放,降低钢铁行业对环境的污染,采用碳酸钾(K_(2)CO_(3))浸渍改性的方法制备了改性活性炭吸附剂,并考察了不同浓度SO_(2)对改性活性炭吸附烧结烟气中NO的影响,及SO_(2)对改性活性炭循环吸附脱附性能的影响。结果表明:SO_(2)能够提高改性活性炭初始NO吸附速率,但显著降低NO的饱和吸附容量;SO_(2)通过化学吸附方式占据活性位点,形成的亚硫酸盐及硫酸盐加热难以脱附,造成改性活性炭难以恢复初始吸附容量;SO_(2)影响下改性活性炭吸附容量的衰减速率约为1.41417mg/g,可以根据衰减速率,配合移动床吸附装置,选择合适的新鲜活性炭投入参数,进而指导改性活性炭吸附去除烧结烟气中NO的应用,有效降低环境污染,实现资源的高效利用。In order to reduce NO_(x) emission and alleviate the environmental pollution from steel industry,a modified activated carbon adsorbent was prepared by impregnation with potassium carbonate(K_(2)CO_(3)).The effect of SO_(2)concentration on the adsorption of NO in sintering flue gas by the modified activated carbon and the cyclic adsorption and desorption performance of the modified activated carbon were investigated.The results show that SO_(2)can improve the initial adsorption rate of NO but significantly reduce the saturated adsorption capacity of the modified activated carbon.SO_(2)occupies the active sites of the carbon by chemical adsorption,and the sulfites and sulfates formed are difficult to be desorbed by heating,resulting in difficulty of recovering the initial adsorption capacity of the modified activated carbon.Under the influence of SO_(2),the attenuation rate of the adsorption capacity of the modified activated carbon is about 1.41417 mg/g.According to the attenuation rate and the moving bed adsorption device,appropriate input parameters of the fresh activated carbon can be adopted to guide the application of the modified activated carbon for removal of NO in the sintering flue gas,which can effectively reduce the environmental pollution and realize efficient utilization of resources.

关 键 词：烧结 烟气 一氧化氮 改性活性炭 吸附 二氧化硫 

分 类 号：X757[环境科学与工程—环境工程] TF046[冶金工程—冶金物理化学]