The Impact of Divergent Structure Parameters in Burner Head on the Low Nitrogen Performance of Water Heaters
This article introduces the theoretical analysis and experimental verification of the divergent premix structure design in the burner head,which achieves pre-mixing of air through micro-channels in the head structure,increases the air factor of side flames,reduces the combustion temperature of side flames,and stabilizes the combustion of the main flame with side flames.This mutual effect prevents flame lifting and is conducive to reducing the emission of harmful gases from the entire burner.Since the combustion products of side flames still contain other components of the air,these gases,along with excess air,diffuse into the main flame,leading to a relatively lower oxygen concentration in the reaction zone of the main flame and a decrease in its combustion temperature.Ultimately,this suppresses the formation of nitrogen oxides in rich flames,resulting in a lower overall nitrogen oxide emission from the burner.
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