How to choose a low nitrogen burner?
How to choose a low nitrogen burner? Many manufacturers are sometimes at a loss. Below small small make up from the type of low nitrogen burner, choose the factor that low nitrogen burner considers, answer to everybody how low nitrogen burner chooses?
Type of low nitrogen burner
Burner is an important equipment in industrial fuel boiler and gas boiler, which ensures the stable ignition of fuel and the complete combustion of fuel. Therefore, to suppress the production of NOx, it must start with burner. According to the combustion technology of reducing NOx, low-nitrogen oxide burners are generally divided into the following categories:
1. Low NOx precombustion chamber burner
Precombustion chamber development research in China in recent 10 years is a kind of high efficiency and grade of low NOx combustion technology, generally speaking, a precombustion chamber of the wind or secondary air and fuel injection system, etc, the mixed fuel and a wind, in a form in the combustion zone precombustion indoor fuel mixture, due to the lack of oxygen, is only part of the fuel combustion, fuel in poor oxygen and low flame temperature of a flame volatile precipitation in the area, thereby reducing NOx formation.
2. Stage burner
The phase burner designed according to the principle of graded combustion makes the fuel and air burn in different stages. As the combustion deviates from the theoretical equivalence ratio, the generation of NOx can be reduced.
3. Self recirculation burner
One is to use the pressure head of combustion-supporting air to absorb part of the burning smoke back into the burner and burn it with the air. Due to the recirculation of flue gas, the heat capacity of flue gas is large, the combustion temperature is reduced, and NOx is decreased.
Another kind of self-recirculation burner is to put part of the flue gas into the recirculation directly in the burner and add the combustion process. This kind of burner has the dual effect of inhibiting nitrogen oxide and saving energy.
4. Thick and light type burner
The idea is that some of the fuel is burned too much, and some of the fuel is burned too little, but the total amount of air over the air remains the same. Since both parts are burning away from the chemical equivalence ratio, the NOx is very low, which is also called deviation combustion or non-chemical equivalent combustion.
5. Split flame burner
The principle is to divide a flame into several small flames. As the small flame has a large heat dissipation area and a low flame temperature, the "heat reaction NO" decreases. In addition, the small flame shortens the residence time of oxygen, nitrogen and other gases in the flame, and has obvious inhibition effect on both "heat reaction NO" and" fuel NO".
6. Mixed accelerator burner
The residence time of flue gas in the high temperature area is one of the main factors influencing NOx production. Improving the mixture of combustion and air can reduce the thickness of the flame surface. The mixed - boost burner is designed according to this principle.
For more information on low nitrogen burners, please consult Beijing chuangwei electromechanical equipment co., LTD.