What is an infrared burner? A detailed explanation of its combustion method and characteristics!

This is a reaction in which fuel combines with oxygen in the air to become carbon dioxide (carbon dioxide) and water, and at that time a large amount of thermal energy is released. This is a chemical reaction called an oxidation reaction.

To completely burn fuel, more air than the theoretical amountis required. The ratio between the theoretical amount of air and the actual amount of air is called the air ratio. The air ratio can also be used to determine the combustion status of combustion equipment. While burning at an air ratio of 1.0 is highly efficient, it is difficult to maintain 1.0 in practice, so combustion is often performed at a slightly higher value. If the air ratio is greater than 1.0, excess air is being supplied, which increases exhaust gas heat loss, and if it is smaller, incomplete combustion occurs due to a lack of air.

*Theoretical air volume:The theoretical amount of air required to completely combust 1m3 of gas fuel

An explosion is a very rapid combustion that causes rapid expansion and mechanical force, which moves the surrounding air and produces an explosion sound. Blow things up at the same time. In other words, the force of explosion is generated. It is the same thing as burning, but thermal energy is converted into mechanical energy through the expansion of gas, which is an explosion.

An infrared burneris a type of radiant burner, also known as a Schwank burner. It is constructed with a ceramiccombustion platemounted on a cast iron body. Surface combustion is performed using only gas, allowing for direct heating and combustion in any direction. Infrared radiation can be easily achieved without the need for fans, blowers, or heat exchangers.

*Radiation burner: A burner that transfers the heat generated by combustion to a solid, raising the temperature of the solid and utilizing the heat radiation from the solid.
There are various methods for transferring heat from a flame to a solid, and the burner structure is determined by the method.

The gas jet from the nozzle draws in almostthe theoretical amountof air, mixes it in the venturi throat, and burns it. This is called the natural aspiration combustion method.

The highest radiation intensity is shown at 2.8 μm, and a peak due to CO2 radiation appears at 4 μm. Looking at the absorption rate of the water film, it can be seen that radiation of 2 μm or more is easily absorbed by water. Therefore, it can be understood that infrared rays with long wavelengths of 2 μm or more are effective for drying, and that infrared burners are suitable for drying.

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It is a type of electromagnetic wave like light and radio waves, and what appears orange is only a small part of the electromagnetic waves emitted by an infrared burner, and infrared rays themselves cannot be seen with the naked eye. The wavelength of the infrared rays emitted has the highest radiation intensity, and has a particularly high absorption rate for water, making it the most effective for drying.

It is a ceramic plate with multiple flame holes of about 1mm in diameter and unevenness on the surface to increase radiation efficiency and make the surface red hot, reaching temperatures of 800°C to 900°C. The size is 46mm x 67mm per piece, and the combustion amount per piece is 420W (360kcal/h).

In this article, we explained the following:

• Combustion, complete combustion, and explosion
• Combustion method and structure of infrared burners

If you are having trouble selecting an infrared burner or combustion equipment, please contact Daido Kogyo!

\The infrared gas burner catalog is available for free download! /