非催化烟气还原脱硝法脱硝特性的试验研究  

Experimental Study on Flue Gas Denitrification by Selective Non-catalytic Reduction Technology

作　　者：刘洪涛[1] 牛胜利[1] 韩奎华[1] 路春美[1] 

机构地区：[1]山东大学能源与动力工程学院,济南250061

出　　处：《动力工程》2009年第9期850-853,共4页Power Engineering

基　　金：山东省自然科学基金资助项目(Z2006F04);山东省环境保护重点科技资助项目(2006046)

摘　　要：在沉降炉脱硝试验平台上,对不同氨剂的选择性非催化还原（SNCR）脱硝特性进行了试验研究.结果表明：反应适宜氨氮比为1.5,氨气、尿素、碳酸氢铵脱硝的最佳温度窗口分别为985-1030℃、775-1085℃、760-1075℃,尿素和碳酸氢铵最大脱硝效率达90%,优于氨气的80%;增大氨氮比或降低烟气氧浓度均可提高SNCR脱硝效率;在以尿素作为还原剂的SNCR脱硝反应过程中,协同加入钠盐添加剂可在保证最大脱硝效率基本不变的前提下,使反应温度窗口由782.9-1086.3℃拓宽为749.5-1086.3℃.The denitrification characteristics of selective non-catalytic reduction （SNCR） technology with ammonia, urea and ammonium bicarbonate were investigated on a drop tube furnace test rig. Results show that the optimum [NH3]/[NO] molar ratio, in which case higher denitrification efficiencies can be obtained, is 1. 5, and the optimum temperature windows of above three reducers are respectively 985- 1 030℃, 775-1 085℃ and 760-1 075℃. The maximum NO removal effieiencies of urea and ammonium bi- carbonate reach about 90%, which are superior to ammoniffs （about 80%）. Either increasing the [NH3]/ [NO] molar ratio or reducing the O2 concentration can raise the SNCR denitrification efficiency. Combining sodium additives with urea in the process of SNCR can widen the temperature windows from 782.9- 1 086.3℃ to 749.5-1 086.3℃ without reducing the maximum NO removal efficiency.

关 键 词：选择性非催化还原 脱硝 氨气 尿素 碳酸氢铵 钠盐添加剂 

分 类 号：X511[环境科学与工程—环境工程]