The low nitrogen burner is used as a common type of burner in industry, and it is divided into six kinds according to the different use principle of low nitrogen burner to facilitate the use of customers.
In the 1. stage low nitrogen burner, a stage burner designed according to the principle of graded combustion is designed to mix fuel and air in a piecewise mixture. Because of the deviation of the theoretical equivalent ratio of combustion, the generation of NOx can be reduced.
2. Self-recirculating low-nitrogen burner is a kind of burner which uses the pressure head of combustion-supporting air to suck part of the burning flue gas back into the burner and mix it with air. Because of the flue gas recirculation, the heat capacity of the combustion flue gas is large, the combustion temperature is reduced, and the NOx decreases. Another kind of self recirculating burner is to recirculate part of the flue gas directly in the burner and add the combustion process. This kind of burner has the double effect of reducing nitrogen oxide and energy saving.
3. The principle of the dense-lean low-nitrogen burner is to make some of the fuels burn excessively dense and some of the fuels burn excessively light, but the overall air volume remains unchanged. Because both parts are burned at a deviation from the chemical equivalence ratio, NOx is very low. This combustion is also called deviation combustion or non-chemical equivalence combustion.
The principle of the 4. division flame type low nitrogen burner is to divide a flame into several small flames. Because of the large heat dissipation area and low flame temperature, the "thermal reaction NO" is reduced. In addition, small flame shortens the residence time of oxygen, nitrogen and other gases in the flame, and inhibits the "thermal reaction NO" and "fuel NO" obviously.
The residence time of the 5. mixed promoted low nitrogen burner flue gas in the high temperature zone is one of the main factors affecting the production of NOx. The improvement of the mixing of combustion and air can reduce the thickness of the flame surface. When the burning load is constant, the flue gas is shortened in the flame surface, which is in the high temperature area, thus reducing the production of the NOx. . The mixing and boosting burner is designed according to this principle.
6. low NOx pre combustion chamber low nitrogen burner pre combustion chamber is a high efficiency and low NOx classification combustion technology developed and studied in China in the past 10 years. The pre combustion chamber is usually composed of primary air (or two air) and fuel injection system. The fuel and primary air mixture is quickly mixed, and the fuel mixture is formed in the first combustion chamber in the pre combustion chamber. In the case of anoxia, only part of the fuel is burned, and volatiles are released from the fuel in the primary flame zone where the oxygen is poor and the flame temperature is low, thus reducing the formation of NOx.
Different low nitrogen burners can play an important role in different fields of industry. Please purchase the low nitrogen burner according to the use of the low nitrogen burner at the time of purchase.