高温还原区喷氨脱硝机理与模拟研究  

Mechanism and simulation study of ammonia-injected denitrification at high-temperature reduction zone

作　　者：陆续[1] 吴庆龙[1] 张向宇[1] 白文刚[1] 张波[1] 高宁[1] 徐宏杰[1] LU Xu;WU Qinglong;ZHANG Xiangyu;BAI Wengang;ZHANG Bo;GAO Ning;XU Hongjie(Xi'an Thermal Power Research Institute Co.,Ltd.,Xi'an 710054,China)

机构地区：[1]西安热工研究院有限公司

出　　处：《热力发电》2019年第12期64-68,共5页Thermal Power Generation

基　　金：国家重点研发计划项目(2018YFB0604103);中国华能集团有限公司总部科技项目(ZD-19-HKR01)~~

摘　　要：无氧或痕量氧条件下,氨与NO反应温度窗口向高温区偏移,这与传统的选择性非催化还原(SNCR)机理存在区别。本文结合GRI 3.0、Skreiberg2004和Glarborg1998机理建立了高温还原区喷氨脱硝机理模型,模拟计算了温度、含氧量等因素对脱硝效率的影响规律。结果表明:计算结果与配气实验数据基本吻合;1200-1600℃温度窗口,含氧量小于1%(体积分数,下同)时,链式反应生成活性基团H和OH促进了氨与NO的反应,理论脱硝效率可达到90%。本文建立的机理模型可为高温喷氨脱硝工艺设计提供参考。The temperature window of the reaction between NH3 and NO will shift to high temperature region in the absence of oxygen or trace oxygen,which is different from the mechanism of the conventional selective noncatalytic reduction(SNCR)method.In this paper,the mechanism model of ammonia-inj ected denitrification at high temperature was established by combming GRI 3.0 with Skreiberg2004 and Glarborg 1998,and the effects of temperature,oxygen content and other factors on the denitrification efEiciency were calculated.The results are in good agreement with the experimental data.Within the temperature window of 1200?1600℃,when the oxygen volume fraction is less than 1%,the chain reaction generates OH and H radicals,which promotes the reaction between NH3 with NO.The theoretical denitrification efficiency can reach 90%.The mechanism model established in this paper will provide an important reference for the process design of ammonia-injected denitrification at hightemperature reduction zone.

关 键 词：脱硝 高温还原区 喷氨 机理 模拟 自由基 

分 类 号：X773[环境科学与工程—环境工程]