液相络合-铁屑还原-酸吸收回收法脱除烟气中的NO_x  

REMOVAL OF NO_x FROM FLUE GAS WITH THE RECOVERY PROCESS OF ABSORPTION WITH ACID FOLLOWING COMPLEX IN AQUEOUS SOLUTION AND REDUCTION WITH IRON FILINGS

作　　者：马乐凡[1] 童志权[2] 尹奇德[1] 郭振华[1] 宋剑飞[1] 

机构地区：[1]长沙理工大学化学与环境工程学院,长沙410076 [2]湘潭大学化工学院环境工程系,湘潭411105

出　　处：《环境化学》2006年第6期761-764,共4页Environmental Chemistry

基　　金：湖南省自然科学基金资助项目(06JJ50085);湖南省教育厅科技项目(03C051)

摘　　要：用“Fe2+螯合剂吸收-铁屑还原-酸吸收”回收法脱除烟气中的NOx,研究了铁屑脱硝过程的影响因素,确定了脱硝过程的合适工艺条件,并对络合脱硝溶液的再生和循环利用进行了研究.结果表明:最佳工艺参数为:络合脱硝溶液中Fe2+EDTA浓度20mmol.l-1,pH值6.0,温度65℃;在此条件下,用两个反应器串联,对O2含量为10.5%的模拟烟气可取得90%以上的脱硝效率.The removal of NOx from flue gas with the sequence of absorption with acid following complex with ferrous chelate in aqueous solution and reduction with iron filings is proposed. The parameters influencing the NOx removal efficiency are investigated in a bubble column. The optimal conditions for removal of NO, is established. The regeneration and utilization circularly of the absorption solution is studied also. The results show that the optimal conditions for removal of NO, from flue gas with the process of iron filings reduction following liquid phase complex in a bobble column is Fe^2＋ EDTA concentration 20 mmol ·l^-1 , pH6, 65℃. Under the circumstances, NO, removal efficiency for flue gas containing O2 10. 5% exceeds 90% in two series absorbers.

关 键 词：氮氧化物 络合 吸收 还原 

分 类 号：X701[环境科学与工程—环境工程]