Main categories of low nitrogen burners

1. FGR low nitrogen burner;
2. External combustion ultra-low nitrogen burner;
3. External combustion + FGR ultra-low nitrogen burner;
Among them, the FGR low-nitrogen burner can generally control NOx to 65 mg in the full fire range, and the limit is about 40 mg. Further reducing NOx emissions may lead to unstable combustion, or sacrifice the adjustability ratio and other disadvantages;
Surface combustion ultra-low nitrogen burners can generally control NOx to less than 30 mg within the full fire range. Its advantage is that it is simple to install and does not require FGR flue gas recirculation pipes; its main disadvantage is that it requires air filtering and increases maintenance work. amount; at the same time, the oxygen content is around 7%, which reduces part of the combustion power. ​
Surface combustion + FGR ultra-low nitrogen burner combines the NOx control advantages of surface combustion and the oxygen content reduction advantages of FGR. It can control NOx to 20 mg level in the full fire range, while controlling the oxygen content within 3%, maximizing combustion. power. Its main disadvantage is the increase in equipment costs.www.burners-china.com