Explanation of working principle of low nitrogen burner.

This low-nitrogen burner has fast combustion speed and high torch temperature, which is beneficial to heat transfer in the furnace. However, the low-nitrogen burner of natural gas boiler is easy to backfire, and the adjustment range of combustion capacity is narrow. The air preheating temperature is limited by the temperature of mixed gas, which must be lower than the ignition temperature of gas, so it is difficult to meet the requirement that the temperature and pressure of preheated air before the burner remain unchanged. The fluctuation of natural gas calorific value will also affect the ratio of natural gas to air. However, due to its simple structure, this burner can directly inject and inhale combustion-supporting air from the atmosphere through natural gas, and when the calorific value of natural gas is stable, it can automatically burn air and natural gas in proportion, so it can be used in a low heat load furnace without preheating air.