What is the working principle of a low nitrogen burner?

What is the working principle of a low nitrogen burner?FuxBoiler Burner
Low nitrogen burner and low nitrogen oxide burner refer to burners with low nitrogen oxide emissions during fuel combustion. The use of low nitrogen oxide burners can reduce the emission of nitrogen oxides during the combustion process.FuxBoiler Burner
The nitrogen oxides generated during the combustion process are mainly NO and NO2, which are commonly referred to as nitrogen oxide NOx. A large number of experimental results indicate that the main nitrogen oxide emitted by combustion devices is NO, accounting for an average of about 95%, while NO2 only accounts for about 5%.FuxBoiler Burner
The NO generated by general fuel combustion mainly comes from two aspects: firstly, the oxidation of nitrogen (combustion air) in the air used for combustion; The other is the thermal decomposition and reoxidation of nitrogen gas contained in the fuel during the combustion process. In most combustion devices, the former is the main source of NO. We refer to this type of NO as' thermal reactive NO ', while the latter are referred to as' fuel NO' and 'prompt NO.'.FuxBoiler Burner
The NO formed during the combustion process can react with intermediate products containing nitrogen atoms, reducing NO to NO2. In fact, in addition to these reactions, NO can also produce NO2 with various nitrogen-containing compounds. When the reaction reaches Chemical equilibrium in the actual combustion device, the proportion of [NO2]/[NO] is very small, that is, the conversion of NO to NO2 is very small and can be ignored.FuxBoiler Burner
Combustion technology for reducing nitrogen oxidesFuxBoiler Burner
NOx is generated through combustion, and combustion methods and conditions have a significant impact on the production of NOx. Therefore, improvements in combustion technology can be used to reduce NOx. The main methods are as follows:FuxBoiler Burner
Choose fuels with lower N content, including fuel denitrification and conversion to low nitrogen fuels;FuxBoiler Burner
Reduce excess air coefficient, organize excessive combustion, and reduce the concentration of oxygen around the fuel;FuxBoiler Burner
When there is less excess air, lower the temperature peak and reduce the "thermal reaction NO";FuxBoiler Burner
In the case of low oxygen concentration, increase the residence time of combustible materials in the front peak and reaction zone of the flame. The commonly used specific methods to reduce NOx formation and emissions include staged combustion, reburning, low oxygen combustion, rich sparse deviation combustion, flue gas recirculation, etc.