Types and installation requirements of low nitrogen burners

Types and installation requirements of low nitrogen burners
Low nitrogen burners are important equipment in industrial oil fired and gas fired boilers. It ensures stable combustion of fuel and complete combustion of fuel. The following is a brief introduction to the low nitrogen burners currently used by our low nitrogen burner manufacturer:
(1) Exhaust gas self circulation low NOx burner
The working principle of combustion is mainly to use the jet of air to make a part of the combustion products flow back to the vicinity of the burner outlet and mix with gas, thereby reducing the oxygen concentration in the circulation zone and preventing the formation of local high-temperature zones. According to relevant data, when the exhaust gas recirculation rate is about 20%, the NOx suppression effect is high, and the NOx emission concentration is 80g/m ³ Below.
(2) Two stage combustion low NOx burner
The working principle of this low nitrogen burner is to send combustion air into the combustion zone twice, dividing the combustion process into two stages to avoid high concentration in the high-temperature zone. Due to the fact that the primary air volume only accounts for 40% to 50% of the total air volume, a strong reducing atmosphere is generated, forming a low oxygen concentration zone, and the temperature of the combustion reaction zone is correspondingly reduced to suppress the formation of NOx. The remaining air (secondary air) is sent out from the periphery of the reducing combustion zone, achieving complete combustion at the end of the flame. Due to the implementation of segmented combustion, concentration in high-temperature areas is avoided, and NOx emission concentration is significantly reduced.
After understanding the types of low nitrogen burners, let's take a look at the installation requirements of the burners:
When installing the burner, the centerline of the burner and the centerline of the burner brick must be installed concentric.
2. The burner shell and burner bricks are tightly installed.
3. The cylinder of the burner should be fixed on a bracket on the steel column of the furnace body.
4. The installation sequence is to first install the burner and then install the oil and gas pipes. When installing oil and gas pipelines, the position of the burner is not affected.
5. The hot air outlet of the burner should be installed above or on both sides, avoiding installation below.
When installing a fire-resistant baffle on the burner, it is necessary to fill the gap between the baffle and the shell. Prevent the baffle from sinking and bending the oil gun.