What are the technical characteristics of low nitrogen burners?

What are the technical characteristics of low nitrogen burners?
With the application of low nitrogen burners, there are various types of low nitrogen burners on the market. To purchase a suitable low nitrogen burner, we need to have an understanding of low nitrogen burners. Let's take a look at the technical characteristics of several common low nitrogen burners.
1. Diffusion combustion
This is a simple combustion method, which has the advantages of simplicity, easy ignition, no flashback, stable combustion, and simple fuel structure. The disadvantage is that for high calorific value gas with high air demand, full combustion cannot be achieved through laminar diffusion, and the content of C0 in the flue gas is relatively high, resulting in a larger volume of gas appliances. The forced blast diffusion combustion method is commonly used for industrial burners in industrial furnaces. Adopting this combustion method requires a reasonable organization of air and gas mixing to avoid generating a large amount of N0x and C0.
2. Partial premixed combustion
Partially premixed combustion is also commonly known as atmospheric combustion. Compared with diffusion combustion, partial premixed combustion has the advantages of full combustion, short flame, and high thermal intensity. However, this combustion method may produce backfire, flame separation, and detachment. Under the condition of controlling the primary air, it can have a certain range of stable flame zones that do not separate from the flame or backfire, and the heat load can be adjusted within this zone. Partial premixed combustion also has the following drawbacks: a. It requires the organization of secondary air, sufficient secondary air inlet area, and necessary furnace height, making it difficult to reduce the volume of combustion equipment. b. The N0x content in combustion products is relatively high. After taking measures, the N0x content decreases, while the C0 content increases, making it difficult to achieve the effect of reducing both C0 and N0x content.
In some high-power burner structures, in order to ensure the success rate of ignition, a flame black zone is formed in the center and partial premixing is used. Others are the same as diffusion combustion.