What types of Low NOx Burners

What types of Low Nox Burner For Boiler?

The low-nitrogen burners on the market are mainly divided into the following types:

1. FGR low-nitrogen burner;

2. Surface combustion ultra-low-nitrogen burner;

3. Surface combustion + FGR ultra-low-nitrogen burner;

Among them, FGR low-nitrogen burners can generally control NOx to 65 mg in the full-fire range, and the limit is about 40 mg. Further reduction of NOx emissions may lead to unstable combustion or sacrifice the disadvantages of adjustable ratio;

Surface combustion ultra-low-nitrogen burners can generally control NOx to less than 30 mg in the full-fire range. Its advantage is that it is simple to install and does not require FGR flue gas recirculation pipeline; its main disadvantage is that it needs to filter air, which increases the maintenance workload; at the same time, the oxygen content is about 7%, which reduces some combustion efficiency.

Surface combustion + FGR ultra-low-nitrogen burner combines the NOx control advantages of surface combustion and the oxygen content reduction advantages of FGR, which can achieve NOx control to 20 mg in the full-fire range, while controlling the oxygen content within 3%, maximizing combustion efficiency. Its main disadvantage is the increased equipment cost.www.burners-china.com