The low-nitrogen burner is an important equipment on industrial oil-fired boilers and gas-fired boilers. It ensures the stable combustion of fuel and the complete combustion of fuel. Here is a brief description of the current types of low-nitrogen oxide burners:
①Exhaust gas self-circulation low NOx burner
The working principle of this low-nitrogen burner is mainly to use the injection of air to make a part of the combustion products flow back to the vicinity of the burner outlet and mix with the gas and air, thereby reducing the oxygen concentration in the circulation area and preventing the formation of local high-temperature areas. . According to relevant information, when the exhaust gas recirculation rate is about 20%, the effect of suppressing NOx is high, and the emission concentration of NOx is below 80g/m³.
② Two-stage combustion low NOx burner
The working principle of this low-nitrogen burner is to pass the air for combustion into the combustion zone twice, so that the combustion process can be completed in two stages and avoid excessive concentration of the high-temperature zone. Since the primary air volume only accounts for 40%~50% of the total air volume, a strong reducing atmosphere is produced, forming a low oxygen concentration zone, and correspondingly reducing the temperature of the combustion reaction zone, suppressing the formation of NOx, and the rest of the air ( Secondary air) is fed from the periphery of the reducing combustion zone, and complete combustion is achieved at the tail of the flame. Due to the implementation of staged combustion, the concentration of high temperature areas is avoided, so the emission concentration of NOx is significantly reduced.
After understanding the types of low nitrogen burners, let's take a look at the installation requirements of the burners:
1. When installing the burner, the center line of the burner must be installed concentrically with the center line of the burner brick.
2. The burner shell and the burner brick are installed closely.
3. The cylinder body of the burner should be fixed on the support supported on the steel column of the furnace body.
4. The installation sequence is to install the burner first, and then install the oil and gas pipe. When installing the oil and gas pipe, the positioning of the burner must not be affected.
5. The hot air inlet of the burner should be installed above or on both sides, and avoid installing below.
6. When installing a refractory baffle on the burner, it must be filled between the baffle and the shell. Prevent the baffle from sinking and bend the oil gun.
The low-nitrogen burner is an important equipment on industrial oil-fired boilers and gas-fired boilers. It ensures the stable combustion of fuel and the complete combustion of fuel. Here is a brief description of the current types of low-nitrogen oxide burners:
①Exhaust gas self-circulation low NOx burner
The working principle of this low-nitrogen burner is mainly to use the injection of air to make a part of the combustion products flow back to the vicinity of the burner outlet and mix with the gas and air, thereby reducing the oxygen concentration in the circulation area and preventing the formation of local high-temperature areas. . According to relevant information, when the exhaust gas recirculation rate is about 20%, the effect of suppressing NOx is high, and the emission concentration of NOx is below 80g/m³.
② Two-stage combustion low NOx burner
The working principle of this low-nitrogen burner is to pass the air for combustion into the combustion zone twice, so that the combustion process can be completed in two stages and avoid excessive concentration of the high-temperature zone. Since the primary air volume only accounts for 40%~50% of the total air volume, a strong reducing atmosphere is produced, forming a low oxygen concentration zone, and correspondingly reducing the temperature of the combustion reaction zone, suppressing the formation of NOx, and the rest of the air ( Secondary air) is fed from the periphery of the reducing combustion zone, and complete combustion is achieved at the tail of the flame. Due to the implementation of staged combustion, the concentration of high temperature areas is avoided, so the emission concentration of NOx is significantly reduced.
After understanding the types of low nitrogen burners, let's take a look at the installation requirements of the burners:
1. When installing the burner, the center line of the burner must be installed concentrically with the center line of the burner brick.
2. The burner shell and the burner brick are installed closely.
3. The cylinder body of the burner should be fixed on the support supported on the steel column of the furnace body.
4. The installation sequence is to install the burner first, and then install the oil and gas pipe. When installing the oil and gas pipe, the positioning of the burner must not be affected.
5. The hot air inlet of the burner should be installed above or on both sides, and avoid installing below.
6. When installing a refractory baffle on the burner, it must be filled between the baffle and the shell. Prevent the baffle from sinking and bend the oil gun.