激光微量氨分析系统在脱硝逃逸氨检测中的应用  

Application of laser trace NH_3 analysis system in de-NO_x slip NH_3 detection

作　　者：郑利武 赵国成 俞大海 任焱 邱梦春 顾海涛[3] 

机构地区：[1]聚光科技(杭州)股份有限公司,浙江杭州310052 [2]沧州华润热电有限公司,河北沧州061000 [3]杭州电子科技大学电子信息学院,浙江杭州310018

出　　处：《电力科技与环保》2015年第5期60-62,共3页Electric Power Technology and Environmental Protection

摘　　要：氮氧化物(NOx)是火电厂排放烟气中的主要污染物之一。烟气脱硝是采用氨作为还原剂,对燃烧后烟气中的NOx进行处理,以降低NOx排放量的技术。通过脱硝后烟气中逃逸氨气的浓度来控制脱硝反应中氨气的投放量,保证氮氧化物排放浓度满足环保法规要求。基于可调谐半导体吸收激光光谱技术,开发了旁路取样式激光逃逸氨分析系统,实现了我国电厂烟气脱硝微量逃逸氨的在线监测。现场应用证明,该系统在我国电厂烟气脱硝逃逸氨检测中得以成功应用。Nitrogen oxides（ NOx） is one of the main pollutants in the flue gas emissions from thermal power plants. Flue gas de- NOxtechnology usually uses ammonia（ NH3） introduced to and mixed with the flue gases in the hot combustion zone where the reduction of NOxtakes place. Ammonia slip is measured after the De- NOxprocess to control the amount of NH3 injected so that enough NH3 is present to react with NOxto minimize the NOxemissions to meet environmental regulations. Extractive slip NH3 analysis system based on tunable diode laser absorption spectroscopy（ TDLAS） has been developed to realize the real- time and dynamic measurement of slip NH3 in flue gas de- NOxprocess for coal- fired power plant of our country. Extractive slip NH3 analysis system has been successfully applied in slip NH3 detection in power plant of our country.

关 键 词：烟气脱硝 逃逸氨分析系统 可调谐半导体激光光谱技术 

分 类 号：X701.7[环境科学与工程—环境工程]