The role of torch steam
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According to the operating procedures, the steam used in the torch serves to support the flame of the torch burner, thereby protecting the burner. By adding steam to the torch, the humidity of the combustible gas increases; as the gas exits the burner, it evaporates first and then burns, which indirectly delays the combustion process. This allows the flame to rise, thus serving to support it – is that correct? ????????
I’ve seen some articles mention that it also has the function of supporting the flame, and I would like to ask the fellow sailors here: what considerations and analyses were taken into account in those articles?
It has three functions: 1. Smoke elimination； 2. Secondly, spiral steam nozzles are generally used in the torch tip, which helps to draw in air and thus promote more complete combustion ； 3. Reduce the temperature of the torch tip to extend its lifespan.
It serves to support the flame; some torch gases with a low calorific value burn at low Mach numbers. Only one supply of central steam with a diameter of DN50 or DN80 is provided, and when the flow rate is low, combustion may occur inside the torch head, requiring the central steam to be used to support the flame.
The first path——The steam from the lower part is introduced through the plum-blossom nozzles located at the bottom of the flare head. A steam-air ejector has been added to these nozzles; by using the high-speed jet of steam, it draws the air surrounding it into the high-temperature combustion area of the flare head via the ejector tubes. It ensures a consistent steam injection volume, while also allowing an amount of air 30 times greater than that of steam to be drawn into the flare head to mix with the exhaust gases, thereby further enhancing the steam’s combustion capability. It increases flame stiffness, shortens the flame length, and lifts the flame, reducing the temperature at the tip of the torch; thereby effectively extending its service life. The second route------The central steam is introduced through the central tube of the flare tip. Steam is sprayed at the outlet of the central tube toward the center of the flame, where it mixes evenly with the exhaust gases to reduce smoke formation; at the same time, it also serves to cool and protect the flare tip. The third route——the smoke-eliminating steam from the upper part is introduced through the steam nozzles located in the upper ring of the flare head. The jets produced by these nozzles form a certain spiral angle with the center line of the flare head; this helps to draw in the surrounding air for combustion, and it also promotes thorough mixing of that surrounding air with the gases emitted by the flare, thereby achieving smoke-free combustion.