Low NOx fuel gas burner based on venturi tubes
A technology of gas burner and Venturi tube, which is applied in the direction of gas fuel burner, burning with multiple fuels, burner, etc. It can solve the problems of poor flame stability, NOx limitation, high temperature, etc., and achieve optimal heat flux Conditions, lower local combustion temperature, enhanced mixing effect
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[0037] Example 1:
[0038] A low-NOx gas burner based on venturi tube, see figure 1 , figure 2 , image 3 as well as Figure 4 , Including a burner body 11 with a cavity, a first-stage burner 6, a second-stage burner 7, an insulating tile 8 and a venturi tube 9.
[0039] A first channel 81 is provided on the longitudinal center axis of the insulation tile 8, and second channels 82 are provided at equal intervals on the periphery of the first channel 81. The lower end of the insulation tile 8 is connected to the burner body 11 The upper end of the burner is connected, and the first passage 81 communicates with the cavity of the burner body 11.
[0040] The upper end of the first passage 81 is provided with a narrowing 811 with a gradually reduced cross-section, and the angle a between the inclined surface of the narrowing 811 and the horizontal plane is 40°~70°, forming a constricted flow path to strengthen the gas and combustion air Mixing, while increasing the uniformity and rigi...
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