How is the 30mg ultra-low nitrogen burner classified?
How is the 30mg ultra-low nitrogen burner classified?
How is the 30mg ultra-low nitrogen burner classified? I think many people are familiar with the 30mg ultra-low nitrogen burner, because you are facing the national requirements for environmental protection, and policies require rectification of boiler burners; But I don’t know that there are actually many classifications for 30mg ultra-low nitrogen burners. Today, the editor will take you to understand the classification of 30mg ultra-low nitrogen burners.
Simply put, the 30mg ultra-low nitrogen burner uses the method of adjusting the fuel to air ratio to significantly reduce nitrogen oxides in the combustion products. The burner is an important equipment on industrial oil and gas boilers, which ensures stable ignition and complete combustion of the fuel. Therefore, to suppress the generation of NOx, it is necessary to start with the burner. According to the combustion technology for reducing NOx, low nitrogen oxide burners can be roughly divided into the following categories: stage burners, stage burners designed based on the principle of staged combustion, which mix fuel and air in stages for combustion. Due to the deviation of combustion from the theoretical equivalence ratio, the generation of NOx can be reduced.
The 30mg ultra-low nitrogen burner is a split flame type burner, which divides a flame into several small flames. Due to the large heat dissipation area and low flame temperature of the small flames, the thermal reaction NO is reduced. In addition, a small flame shortens the residence time of gases such as oxygen and nitrogen in the flame, and has a significant inhibitory effect on thermal reaction NO and fuel NO. The residence time of flue gas in the high-temperature zone is one of the main factors affecting the generation of NOx in a mixed promotion burner. Improving the mixing of combustion and air can reduce the thickness of the flame surface. With a constant combustion load, the residence time of flue gas in the high-temperature zone of the flame area is shortened, thereby reducing the generation of NOx. The mixed promotion burner is designed according to this principle.
30mg ultra-low nitrogen burner with low NOx pre chamber burner. Pre chamber is a high-efficiency, low NOx staged combustion technology developed and researched in China in the past 10 years. The pre chamber is generally composed of primary air (or secondary air) and fuel injection system, etc. The fuel and primary air are quickly mixed to form a rich fuel mixture in the primary combustion zone of the pre chamber. Due to oxygen deficiency, only part of the fuel is burned, and volatile components are released in the primary flame zone with low oxygen and flame temperature, thus reducing the generation of NOx.
The 30mg ultra-low nitrogen burner has its own recirculation burner. One method is to use the pressure head of the combustion air to suck back some of the combustion flue gas, which enters the burner and mixes with the air for combustion. Due to the recirculation of flue gas, the heat capacity of the combustion flue gas is large, the combustion temperature decreases, and NOx is reduced. Another type of self recirculation burner is to directly recycle some of the flue gas into the burner and add it to the combustion process. This type of burner has a dual effect of inhibiting nitrogen oxides and saving energy. The principle of a rich lean burner is to burn a portion of the fuel in an overly rich manner and another portion in an overly lean manner, while keeping the overall air volume constant. Due to both parts burning at a deviation from the stoichiometric ratio, NOx is very low, and this type of combustion is also known as deviation combustion or non stoichiometric combustion.
How is the 30mg ultra-low nitrogen burner classified? Compared to the introduction above, many people have gained a certain understanding. Our goal is to hope that everyone can have a clear understanding of the 30mg ultra-low nitrogen burner, so that they can choose the appropriate 30mg ultra-low nitrogen burner when making modifications.