燃气锅炉低氮排放技术应用与进展
Application and progress of low-NOx emission technology for gas boilers
张群力 1苏媛 2刘涛 2黄昊天 2郭颖杰 2李彦鑫2
作者信息
- 1. 北京建筑大学环境与能源工程学院 供热、供燃气、通风及空调工程北京市重点实验室,北京 100044;北京建筑大学北京节能减排与城乡可持续发展省部共建协同创新中心,北京 100044
- 2. 北京建筑大学环境与能源工程学院 供热、供燃气、通风及空调工程北京市重点实验室,北京 100044
- 折叠
摘要
在碳达峰和碳中和背景下,节能减排尤为重要.相比于传统化石燃料,天然气锅炉燃烧所生成的污染物较少,然而,燃气锅炉燃烧过程存在着NOx排放量过高的问题.为持续深入推进大气污染防治工作,降低燃气锅炉燃烧全过程产生的NOx排放量至关重要.相较于尾部脱硝技术,低氮燃烧技术具有更优秀的经济性与更广泛的适用性,因此常用于燃气锅炉改造中.简述燃烧过程中NOx生成和还原机理,综述分级燃烧、烟气再循环、加湿燃烧等多种应用较广泛的低氮燃烧技术,并分析各自的降氮原理、影响因素及减排效率,总结各技术的优缺点.除此之外,关于低氮燃烧技术存在燃烧不稳定、效率低的问题,分析多种低氮燃烧技术集成实现降氮的可行性.
Abstract
In the context of peak carbon dioxide emission and carbon neutrality,energy conservation and emission reduction are particularly important.Compared with traditional fossil fuels,natural gas boiler combustion produces fewer pollutants.However,the gas boiler combustion process suffers from high NOx emissions.In order to continuously promote the prevention and control of air pollution,it is important to reduce NOx emissions from the whole process of gas boiler combustion.Compared with tail denitrification technology,low-NOx combustion technology is commonly used in the retrofit of gas boilers due to its superior economics and wider applicability.The mechanism of NOx generation and reduction in the combustion process was briefly described,various low-NOx combustion technologies were reviewed,such as staged combustion,flue gas recirculation,humidification combustion.Their respective principles of nitrogen reduction,influencing factors and emission reduction efficiency were analyzed,and the advantages and disadvantages of each technique were summarized.In addition,regarding the problems of unstable combustion and low efficiency in low-NOx combustion technology,the feasibility of integrating various low-NOx combustion technologies to realize nitrogen reduction was analyzed.
关键词
低氮燃烧技术/燃气锅炉/NOx/节能减排Key words
low nitrogen combustion technology/gas boiler/NOx/energy conservation and emission reduction引用本文复制引用
基金项目
北京建筑大学博士研究生科研能力提升项目(DG2023010)
出版年
2024
国家科技期刊平台
NSTL
万方数据