Abstract: Gas fuel has the characteristics of easy ignition,rapid combustion and complete combustion,and its nitrogen,sulfur and ash content are low,and the content of pollutant is relatively low after combustion,which belongs to cleaner fuel.In addition,with the implementation of national gas subsidy policy,gas fuel combustion has a good development prospect in recent years.However,with the country's stricter control of air pollutants,it is very important to control the formation of nitrogen oxides in the process of gas fuel combustion.Firstly,in the paper,the production mechanism and influencing factors of different kinds of Noxwere introduced,and the control measures were put forward according to the production mechanism of different kinds of NO_x.Secondly,based on the NO_xgeneration mechanism,the low nitrogen principle and application status of gas combustion technology widely used at present were analyzed.Finally,the conclusion of this paper and the prospect of gas burner application were puts forward.It is considered that the main factors in the process of gas combustion are thermal NO_xand fast NO_x,and temperature and excess air coefficient are the main factors affecting NO_xgeneration.When the combustion temperature is higher than 1 500 ℃,the thermal NO_xincreases exponentially,and temperature is the most important factor affecting the generation of NO_x.According to the mechanism of Noxgeneration,the essence of low NO_xcombustion technology is to reduce the maximum combustion temperature,control the fuel concentration and oxygen concentration in the combustion area,which shorten the residence time of flue gas in the high temperature area,and destroy the best conditions of NO_xgeneration,and finally inhibit the generation of NO_x.These combustion technologies reduce the generation of NO_xto a certain extent,but it will destroy the whole combustion process,which causes adverse effects on the combustion and heat release process,and reduces the combustion efficiency and heat transfer efficiency,so how to solve these contradictions is an urgent problem.In practical application,it is necessary to select the appropriate combustion technology according to the demand,and at the same time,it can combine different combustion technologies to achieve the effect of stable combustion and low nitrogen.At present,the most widely used gas combustion technologies are staged combustion technology,flue gas recirculation combustion technology,flameless combustion technology and so on.Catalytic combustion technology is a promising combustion technology,which has been applied in many fields.The thermal stability and life of catalyst are the core problems limiting its wide application in industry.