TiO_2载体低温催化剂脱氮技术应用试验  

Application of TiO_2 catalyst for low-temperature selective catalytic reduction of NOx in PC kiln

作　　者：李春萍[1] 顾军[1] 陈晓东[1] 籍砚军 芦澍[1] 李威 

机构地区：[1]北京建筑材料科学研究总院固废资源化利用与节能建材国家重点实验室,北京100041 [2]北京太行前景水泥有限公司,北京102471

出　　处：《水泥》2012年第2期5-7,共3页Cement

基　　金：北京市科技计划课题(Z2111100066811013);金隅集团重点项目

摘　　要：将TiO2载体低温催化剂在水泥窑脱氮上进行了初步试验。首先取氨氮比为0.9,计算出理论喷氨量并运用于该试验。在相同烟气量和喷氨量下,经过催化反应,NOx浓度从初始的503mg/m3(标态)降为170℃时的57.5mg/m3(标态)。当喷入过量氨气时,随着温度的升高,催化剂的脱氮效率变化规律与氨气没有过量喷入时基本相同,其最大脱氮效率为89.45%,反应条件为170℃,氨气流量4.00SL/min。连续运行20h,脱氮效率上下波动为±1%。使用6个月后烟气截面催化剂孔道没有阻塞,即此低温催化剂可在水泥窑袋除尘器之后长期使用。Low-temperature selective catalytic reduction（SCR） denitrification in PC kiln was conducted using TiO2 catalyst.Take the NH3/N2 ratio as 0.9,the theoretical quantity of ammonia consumption was calculated and applied in this experiment.Maintain stationary exhaust gas flow volume and ammonia consumption quantity,concentration of NOx reduced from initial 503mg/m3 at normal state to 57.5mg/m3 of 170℃ after catalytic reaction.When excess ammonia was injected into SCR reactor,denitrification efficiency was familar to that without excess ammonia with temperature increasing and achieved the maximum of 89.45% under conditions of 170 ℃,ammonia flow rate of 4.00 SL/min.Denitrification efficiency fluctuated ± 1% only after 20h continuous operating.TiO2 catalyst injecter has not been blocked after 6 months that means TiO2 low-temperature catalyst could be long-term used behind bag filter in PC kiln.

关 键 词：TIO2催化剂 低温 喷氨量 脱氮效率 运行稳定性 

分 类 号：TQ172.9[化学工程—水泥工业] X781.5[化学工程—硅酸盐工业]