Application and progress of low-NOx emission technology for gas boilers
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.
low nitrogen combustion technologygas boilerNOxenergy conservation and emission reduction
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