燃煤锅炉氧化亚氮排放现状与研究分析

Emission status and research analysis of nitrous oxide emissions fromcoal-firedboilers

为加快实现“碳达峰”和“碳中和”目标,国家、地方及行业陆续出台了一系列关于温室气体控制的法律、法规及制度文件。氧化亚氮(N_(2)O)作为一种具有较强温室效应的气体,引起越来越多研究者的重视。总结了国内外N_(2)O研究现状,对比了典型燃煤锅炉N_(2)O排放情况,分析了燃烧过程中N_(2)O的生成机理、影响因素、抑制方法及脱除手段,探讨了燃煤锅炉的N_(2)O减排策略,指出在加强燃煤锅炉N_(2)O相关标准的制订、新技术研发及示范应用工作的同时,还需要对N_(2)O的影响因素如加压富氧条件、煤质自身含水率等加深研究,进一步完善抑制与脱除办法。

In order to accelerate the achievement of the goals of"carbon peaking"and"carbon neutrality",a series of laws,regulations,and institutional documents on greenhouse gas control have been introduced by the country,local governments,and industries.Nitrous oxide(N_(2)O),as a gas with strong greenhouse effects,has attracted increasing attention from researchers.This article summarizes the current research status of N_(2)O at home and abroad,compares the N_(2)O emissions of typical coal-fired boilers,analyzes the generation mechanism,influencing factors,suppression methods,and removal methods of N_(2)O during the combustion process,explores N_(2)O emission reduction strategies for coal-fired boilers,and provides suggestions.It is necessary to strengthen the formulation of N_(2)O related standards,research and development of new technologies,and demonstration applications for coalfired boilers.Further research is needed on the influencing factors of N_(2)O,such as pressurized oxygen enrichment conditions and coal moisture content,to further improve the suppression and removal methods.