In atmospheric burners, air is supplied directly from the room where the boiler is installed. Here, the principle of elementary ejector is employed. Gas is fed through specially shaped nozzles located inside the channel. Air for combustion can be sucked inside and mixed with the combustible gas. Several slots are located near that area used for blowing the prepared gas and air mixture.
Air, traveling in the direction from nozzle to discharge port, is diluted by gas and air mixture. The required amount of remaining air is drawn inside by the flame due to diffusion.
Combustion takes place in the special combustion chamber that features several channels laid parallel to each other. Each channel is equipped with a separate nozzle.
Heated gases after incineration are blown in the top section of the heat exchanger where they release a certain part of their energy. Then, they are discharged through the gas flue. As a result of this process, due to the temperature drop that accompanies it, an air flow is generated. As a result, new oxygen portions are fed continuously.
Benefits of atmospheric burners:
However, atmospheric burners have certain drawbacks. Firstly, it is mandatory that a gas flue is installed. Completeness of gas/air mixture combustion depends exclusively on air composition and on professional installation of all heating boiler systems.