烟气再循环条件下氮氧化物浓度的折算
Nitrogen Oxide Concentration Conversion under Flue Gas Recirculation Conditions
徐力 1高建民 2夏红伟 1栾积毅 3杜谦2
作者信息
- 1. 安徽省特种设备检测院 能效与锅炉检测中心,安徽 合肥 230051
- 2. 哈尔滨工业大学 能源科学与工程学院,黑龙江 哈尔滨 150001
- 3. 佳木斯大学 机械工程学院,黑龙江 佳木斯 154007
- 折叠
摘要
烟气再循环可以有效降低工业锅炉氮氧化物排放.因为循环烟气的O2 浓度低于空气,和锅炉常规烟气混合后,会导致传统的氮氧化物浓度折算公式不再适用.针对这个问题,本文从NO守恒和O2 守恒角度出发,简化处理循环烟气参数,研究并重新推导了烟气再循环条件下NO浓度折算公式.研究发现,新的折算公式较传统的折算公式多乘了一个(1+k/100)项,表明烟气再循环条件下的NO折算浓度和烟气再循环率k成正比关系.新的NO浓度折算公式可以更加客观和公正地评价烟气再循环技术的低氮效果,也适用于其他氮氧化物、颗粒物、二氧化硫、汞及其化合物等锅炉大气污染物排放浓度的折算与评价.
Abstract
Flue gas recirculation can effectively reduce nitrogen oxide emissions from industrial boilers.Because the O2 concentration of circulating flue gas is lower than air,mixing it with boiler flue gas will result in the inapplicability of the traditional nitrogen oxide concentration conversion formula.Based on the NO and O2 conservations and the simplified treatment of circulating flue gas parameters,this article researches and rederives the NO concentration conversion formula under flue gas recirculation conditions.It is found that the new conversion formula has an additional(1+k/100)term compared with the tradi-tional formula,indicating that the converted NO concentration is proportional to the flue gas recirculation rate(k).The new conversion formula can objectively and fairly evaluate the low nitrogen transformation effect of flue gas recirculation.It also applies to the conversion and evaluation of other nitrogen oxides,particulate matter,sulfur dioxide,and mercury compounds.
关键词
工业锅炉/低氮/烟气再循环/氮氧化物/浓度折算Key words
industrial boiler/low nitrogen/flue gas recirculation/nitrogen oxide/concentration conversion引用本文复制引用
出版年
2024
NETL
NSTL
万方数据