1. Heavy oil burner, gas burner and dual fuel burner (light oil/gas or heavy oil/gas).
2. According to the operation and operation mode: Ou Ruite burner has one-stage, two-stage, progressive two-stage and progressive two-stage with proportional regulator (the latter implements proportional adjustment operation)
3. Industrial burner series: all high-power burners, designed for special industrial applications.
4. Classification based on combustion technology to reduce NOx
The burner is an important equipment on industrial oil-fired boilers and gas-fired boilers. It ensures stable combustion of fuel and complete combustion of fuel. Therefore, to suppress the production of NOx, it is necessary to start with the burner. According to the combustion technology to reduce NOx, low nitrogen oxide burners are roughly divided into the following categories:
Stage burner
The staged combustor designed according to the principle of staged combustion makes the fuel and air mixed and combusted in stages. Because the combustion deviates from the theoretical equivalent ratio, it can reduce the generation of NOx.
Self-recirculating burner
One is to use the pressure head of the combustion air to suck back part of the combustion flue gas, enter the burner, and mix and burn with the air. Due to the flue gas recirculation, the heat capacity of the combustion flue gas is large, the combustion temperature is reduced, and the NOx is reduced.
Another type of self-recirculating burner is to recirculate part of the flue gas directly in the burner and join the combustion process. This kind of burner has the dual effect of suppressing nitrogen oxides and energy saving.
Concentration burner
The principle is to make a part of the fuel burned richly, and another part of the fuel burned too lightly, but the overall air volume remains unchanged. Since both parts are combusted under deviating stoichiometric ratio, the NOx is very low. This kind of combustion is also called deviated combustion or non-stoichiometric combustion.
Split flame burner
The principle is to divide a flame into several small flames. Due to the large heat dissipation area of the small flames, the flame temperature is lower, which reduces the "thermal reaction NO". In addition, the small flame shortens the residence time of oxygen, nitrogen and other gases in the flame, and has a significant inhibitory effect on "thermal reaction NO" and "fuel NO".
Mixing promotion type burner
The residence time of the flue gas in the high temperature zone is one of the main factors that affect the amount of NOx generated. Improve the mixing of combustion and air, which can reduce the thickness of the flame surface. Under the condition of the combustion load unchanged, the flue gas is at a high temperature on the flame surface. The stay time in the zone is shortened, thereby reducing the amount of NOx generated. The mixing promotion burner is designed according to this principle.
Low NOx pre-chamber burner
The pre-combustion chamber is a high-efficiency, low-NOx staged combustion technology developed and researched in my country in the past 10 years. The pre-combustion chamber is generally composed of primary air (or secondary air) and a fuel injection system. The fuel and primary air are rapidly mixed. A fuel-rich mixture is formed in the primary combustion zone in the pre-combustion chamber. Due to the lack of oxygen, only part of the fuel is burned. The fuel releases volatiles in the primary flame zone with low oxygen and lower flame temperature, thus reducing the generation of NOx.
2. According to the operation and operation mode: Ou Ruite burner has one-stage, two-stage, progressive two-stage and progressive two-stage with proportional regulator (the latter implements proportional adjustment operation)
3. Industrial burner series: all high-power burners, designed for special industrial applications.
4. Classification based on combustion technology to reduce NOx
The burner is an important equipment on industrial oil-fired boilers and gas-fired boilers. It ensures stable combustion of fuel and complete combustion of fuel. Therefore, to suppress the production of NOx, it is necessary to start with the burner. According to the combustion technology to reduce NOx, low nitrogen oxide burners are roughly divided into the following categories:
Stage burner
The staged combustor designed according to the principle of staged combustion makes the fuel and air mixed and combusted in stages. Because the combustion deviates from the theoretical equivalent ratio, it can reduce the generation of NOx.
Self-recirculating burner
One is to use the pressure head of the combustion air to suck back part of the combustion flue gas, enter the burner, and mix and burn with the air. Due to the flue gas recirculation, the heat capacity of the combustion flue gas is large, the combustion temperature is reduced, and the NOx is reduced.
Another type of self-recirculating burner is to recirculate part of the flue gas directly in the burner and join the combustion process. This kind of burner has the dual effect of suppressing nitrogen oxides and energy saving.
Concentration burner
The principle is to make a part of the fuel burned richly, and another part of the fuel burned too lightly, but the overall air volume remains unchanged. Since both parts are combusted under deviating stoichiometric ratio, the NOx is very low. This kind of combustion is also called deviated combustion or non-stoichiometric combustion.
Split flame burner
The principle is to divide a flame into several small flames. Due to the large heat dissipation area of the small flames, the flame temperature is lower, which reduces the "thermal reaction NO". In addition, the small flame shortens the residence time of oxygen, nitrogen and other gases in the flame, and has a significant inhibitory effect on "thermal reaction NO" and "fuel NO".
Mixing promotion type burner
The residence time of the flue gas in the high temperature zone is one of the main factors that affect the amount of NOx generated. Improve the mixing of combustion and air, which can reduce the thickness of the flame surface. Under the condition of the combustion load unchanged, the flue gas is at a high temperature on the flame surface. The stay time in the zone is shortened, thereby reducing the amount of NOx generated. The mixing promotion burner is designed according to this principle.
Low NOx pre-chamber burner
The pre-combustion chamber is a high-efficiency, low-NOx staged combustion technology developed and researched in my country in the past 10 years. The pre-combustion chamber is generally composed of primary air (or secondary air) and a fuel injection system. The fuel and primary air are rapidly mixed. A fuel-rich mixture is formed in the primary combustion zone in the pre-combustion chamber. Due to the lack of oxygen, only part of the fuel is burned. The fuel releases volatiles in the primary flame zone with low oxygen and lower flame temperature, thus reducing the generation of NOx.
