Gas boiler burning high calorific value of gas, want to make gas fully burning, requires a lot of mixed with the air. No fuel atomization process and the combustion process gas gasification process. Gas mixed with air way, on the strength of the combustion, flame length and flame temperature has great influence. According to mix in a different way, henan gas boiler manufacturers think gas combustion method can be divided into three types:
1, the diffusion combustion
The combustion method is mixed in advance, but in the gas jet diffusion, and burning. Its advantages burn stability, burner structure is simple, but the flame is longer, are prone to incomplete combustion, the heating area of carbide.
Part 2, premixed combustion air
The combustion mode namely before burning in advance will be part of the air and gas mixture (an excess air coefficient between 0.2-0.8), and for burning. The clear advantage is burning flame, burning reinforcement, high thermal efficiency. But the combustion instability, control of the primary air and burning ingredients to demand higher. Gas burner generally use the combustion mode.
3, flameless combustion
The combustion mode namely gas required for air and gas mixing before burning. Once the excess air coefficient is equal to the fuel combustion air surplus coefficient, in the process of combustion does not need to get oxygen from the surrounding air. When the gas and air mixture reach the combustion zone after burn out in a flash.