大气压非平衡等离子体注入烟气脱硝研究  

Hydroxyl Radical Denitrification of Simulative Flue Gas Using Plasma-generated Products

作　　者：潘巧媛[1] 白敏冬[1] 张芝涛[1] 冷宏 朱玉鹏 

机构地区：[1]大连海事大学环境工程研究所,辽宁大连116026 [2]大连博羽环保技术开发公司,辽宁大连116026

出　　处：《科技导报》2009年第14期86-89,共4页Science & Technology Review

基　　金：国家自然科学基金项目(50778028);中国高技术研究发展计划(863计划)项目(2008AA062317)

摘　　要：为改进羟基自由基烟气脱硝效率,采用强电离电场放电方法制取高浓度羟基自由基,并直接注入烟气中氧化NOx生成硝酸,整个过程无催化剂、吸收剂。研究了·OH注入量和气体温度的变化对脱硝率的影响。结果表明,NO及NOx的脱除率随·OH注入量的增大明显上升,烟气温度为70℃,流量1.2m3/h,NO被完全脱除,NOx脱除率可达92%以上。温度是影响脱硝率的主要因素之一,温度每升高10℃,NOx脱除率降低约13.3%。在一定范围内,NOx初始浓度对于脱硝率影响甚微。Using strong electric field ionization discharge technique, H2O and O2 in the flue gas are ionized, decomposed, and excited to form hydroxyl radicals. Under the condition of no absorbent and catalyst, NOx is oxidized into the droplets of HNO3 by hydroxyl radicals directly injected into the reaction chamber. The results show that a high injection rate of ·OH is beneficial to NO, removal from the flue gas. When the gas flow rate is 1.2 m^3/h and the gas temperature is 70℃, the removal rate of NOx reaches 92%. The temperature is a main influencing factor for NOx removal, and the removal rate of NOx could be improved by 13.3% for every 10℃ of gas temrature failing. In certain extent, the NOx initial concentration has little effect on the removal efficiency of NOx.

关 键 词：强电场电离放电 羟基自由基 烟气脱硝 温度 

分 类 号：X701.3[环境科学与工程—环境工程]