Gas Burners

.tags Gas burners are the natural gas combustion devices, which make the natural gas and air separately or mixed into the combustion zone to achieve stable combustion. Gas burners are usually made by cast iron, especially by gray cast iron. Gas burners are the basic parts for residential gas stoves and industrial furnaces.

There are a wide range of cast iron gas burners. According to the primary air factor, there are diffusion-type, atmospheric and non-flame burners. According to the air supply methods, there are injector burners and blast-type burners. According to gas pressures, there are low, medium and high pressure gas burners.

Diffusion-type gas burners rely on the diffusion effect of the natural gas after escaping from the fire hole, making gas and air mixture to achieve the stable combustion. Diffusion-type burner structure is very simple, easy to use, the flame is stable. But its slow burning flame needs to achieve more complete combustion excess air, the combustion temperature is low. Diffusion burner for the application of low temperature, but the required temperature more uniform.Mainly for the civilian industrial furnace gas appliances.Small diffusion burner is also commonly used for ignition.

Atmospheric burners are part of the air pre-mixed burners. Natural gas will go into the mixing tube from the gas nozzle by a certain pressure, forming a high-speed jet by negative pressure to the surrounding part of the air intake, after mixing in the mixed tube burner head from the hole to escape the fire burning. Atmospheric burners have more complete combustion, easy to use, but the weights are larger. Porous atmospheric gas appliance burners are widely used in civilian.

Blast burners use all air from the blowers. So, the combustion intensity and flame length depend on the mixture of gas and air. To enhance combustion, take all measures to make the gas and air mixture evenly, so another blast burner casing, swirl blade, volute flow and other types of peace. With the same heat load ejector burner compared to blast burner structure is more compact. When the gas and air mixture was better, the flame is shorter. Large heat load adjustment range. But this need with a blower burner, burner itself can not automatically adjust the gas and air mix. Blast burner mainly used for various industrial furnaces and large boilers.

Flameless combustion burners are required for all gas and air pre-mixed combustion process is very short or even see the flame of the burner flame. Commonly used inhaled air ejector, and fully pre-mixed gas in the high-temperature combustion flue in a snap. Flue heat intensity is high, the combustion temperature is higher. No flame burner in the industrial application of heating and drying process is very extensive.

Flat flame burners have the flat flame shape. Air and gas flow, respectively, by the cyclone, both to state strongly mixed into the swirl combustion in flared. Because the centrifugal force, the formation of the exit flue flat flame. The burner temperature is uniform, rapid heating can save gas, but the technical requirements of high processing installation.

In addition to these various gas burners, in order to save energy, reduce pollution and noise, some new gas burners are been developed, such as immersion burners, high-speed burners, low carbon oxide burners, pulse burners and united gas burners.

This article was from Dandong Foundry Blog.

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