What are the common combustion methods of boiler burners?

Natural gas boilers are now widely used and have become the focus of energy-saving and environmentally friendly renovations in the thermal industry. Do you know how the burner of the gas boiler you are using burns? Today to talk about the combustion method of gas boiler burner.

1.Diffusion combustion

Diffusion type combustion method is not to premix, but to diffuse the gas to each other at the nozzle opening, and then burn it.

Advantage: This type of combustion is not pre-mixed, but diffuse the gas at the nozzle opening, and then burn it. The combustion method is relatively simple and the flame is relatively stable.

Disadvantages: Because of the long flame, it is easy to produce incomplete combustion phenomenon, will produce more carbon monoxide and nitrogen oxides, which is not conducive to the full use of boiler fuel, boiler thermal efficiency, and difficult to meet the boiler emission standards.

2.Full premixed combustion method

Full premixed combustion method is to pre-mix natural gas and air before combustion, the mixed gas in the burner chamber combustion.

Advantage: Pre-mixed air and gas, multiple radiant heat transfer, heat transfer intensity is increased. The advantage of using this combustion method is that the flame is clearer and the thermal efficiency is higher.

Disadvantages: combustion premixing ratio requires accurate combustion rate fast, uniform combustion full radiation heat transfer.

3.Flameless combustion

The space before combustion and gas in the gas boiler for homogeneous mixing of combustion methods. When using this method, the oxygen required by the gas in the process of combustion does not need to be obtained in the surrounding air, and only needs to reach the combustion zone with the air mixture to achieve instantaneous combustion completion.