Low-nitrogen oxide combustor

[0028] Example 1

[0029] Such as Figure 1 to Figure 8 As shown, a low nitrogen oxide burner includes an inner shell 1 and an outer shell 2 installed outside the inner shell 1. A fire hole plate 3 is provided at one end of the outer shell 2, and a dense flame is formed between the outer shell 2 and the inner shell 1. Channel 4; the inner shell 1 is formed with a premixing channel 5 and a light flame channel 6 communicating with each other, and the inner shell 1 is provided with a dense flame premixing gas inlet 7 that communicates the premixing channel 5 and the dense flame channel 4, and the inner shell 1 A secondary air inlet 8 for outside air to enter the light flame channel 6 is provided; a number of thick flame holes 9 connected to the dense flame channel 4 and a number of light flame holes 10 connected to the light flame channel 6 are provided on the fire orifice plate 3; The premixing channel 5 is vertically upward and forms a "T" shape with the fire orifice plate 3. The p

[0039] Example 2:

[0040] The difference from Example 1 is that Figure 8 As shown, one end of the housing 2 can also be installed with a fire hole core 14 instead of the fire hole plate 3. The fire hole core 14 is a structure formed by a plurality of stainless steel plates arranged at intervals, and a gas channel is formed between the several stainless steel plates and formed at the top end. The top of the light fire hole 10 and the thick flame channel 4 form a thick fire hole 9.

[0041] working principle:

[0042] Fuel gas is injected into the injection section 51 of the premixing channel 5 at a certain pressure, and the air outside the burner is drawn into the premixing channel 5 and fully mixed in the mixing section 52 to become a premixed gas of fuel gas and air, such as Figure 5 As shown, the premixed gas is divided into three gas paths, of which the left and right gas paths enter the rich flame channels 4 on the left and right through the rich flame premix gas inlet 7, and the