水合肼净化烟气NO_x过程的影响因素分析  

Modeling Analysis of the De-NO_x Process with Hydrazine Hydrate

作　　者：韩苏强[1] 陈德珍[1] 李咸伟[2] 

机构地区：[1]同济大学热能与环境工程研究所,上海200092 [2]宝钢研究院,上海201900

出　　处：《能源技术》2009年第5期253-256,269,共5页Energy Technology

基　　金：国家自然科学基金钢铁联合基金资助(No:50874134)

摘　　要：采用反应动力学和计算流体力学软件对水合肼还原高温烟气中NOx过程进行了模拟计算。根据模拟结果分析了烟气温度、N2H4/NO摩尔比、烟气中氧含量、停留时间、烟气中NO初始浓度以及水合肼溶液的浓度对NO净化效率的影响。分析结果发现:N2H4/NO摩尔比取0.8,使用质量分数为5%浓度的水合肼溶液喷加到1023K的烟气中并且保证停留时间尽量长,可以取得最好的NO净化效果。分析结果可以为实际操作提供指导。A reaction kinetics model code and computational fluid dynamics code has been employed to simulate the reduction process of NOx with hydrazine Hydrate in the flue gas. The impact of different reaction condition such as flue gas temperature, N2H4/NO ratio, the O2 concentration, the residence time, initial NO concentration and the hydrazine hydrate solution concentration is investigated. Results show that 5% concentration of hydrazine hydrate solution injected in flue gas where its temperature is 1 023 K, N2H4/NO ratio is 1 and the residence time is as long as can be obtained, can gain best efficiency of NO decontamination. The research provides directions for parameter optimization in practice.

关 键 词：水合肼 NOx 烟气净化 反应动力学计算 

分 类 号：X201.7[环境科学与工程—环境科学]