摘要
在电加热的管式反应炉上进行了NH3选择性非催化还原(SNCR)NO气相均相反应的实验研究,结果表明:最佳脱硝温度约为925℃,最大脱硝效率约为83%。综合考虑脱硝效率、NH3漏失和运行成本,最佳氨氮摩尔比为1.5。NO初始浓度从300μL/L降到100μL/L,脱硝效率由83%降到57%,但是脱硝后NO的排放浓度几乎不变,约为50μL/L。当O2浓度从1%增加到10%,脱硝效率由91%降到75%,反应后剩余的NH3由43μL/L减少到10μL/L。925℃时SNCR反应完全进行需要1s以上的停留时间,而1000℃时只需0.4s。
On an electrically-heated tubular reaction stove,an experimental study was performed of a gas phase homogeneous reaction of NH3 to selectively and non-catalytically reduce NO. The test results show that the optimum denitration temperature is around 925 ℃ with the maximum denitration efficiency being 83%. With the denitration efficiency,NH3 leakage loss and operation cost being taken into account as a whole,the optimum ammonia mol ratio is 1.5. When the initial concentration of NO decreases from 300 μL/L to 100 μL/L,the denitration efficiency will go down from 83% to 57%. The NOx emissions concentration after the denitration,however,is about 50 μL/L,almost without any changes. When the oxygen concentration increases from 1% to 10%,the denitration efficiency will decline from 91% to 75% and the remaining NH3 after the reaction will diminish from 43 μL/L to 10 μL/L. At 925 ℃,to complete a SNCR (selective non-catalytic reduction) reaction process will require more than 1 second of residence time,while at 1 000 ℃,the process will need only 0.4 seconds.
出处
《热能动力工程》
CAS
CSCD
北大核心
2010年第1期87-90,共4页
Journal of Engineering for Thermal Energy and Power
基金
国家重点基础研究发展规划基金资助项目(2006CB200303)
国家"863"高科技基金资助项目(2007AA05Z337)
关键词
选择性非催化还原
脱硝效率
氨氮比
氨漏失
selective non-catalytic reduction,denitration efficiency,ammonia and nitrogen ratio,ammonia leakage loss
