Flame color

Yellow, I’m sorry, I typed it wrong.

The torch represents the gases emitted by various workshops; there may be liquefied gas involved

The sight of liquefied gas being emptied is truly spectacular; have you ever seen a fireball descend directly? I want to ask, what is their gas holder system doing?

Especially when the plant is shut down and a flare is used for emission, it’s quite spectacular

The color of a flame is related to its temperature; different combustibles and different oxygen levels result in varying flame colors. A flame is actually plasma that emits light – the higher the heat energy, the greater the energy of the photons emitted, and the color shifts toward blue, with the spectrum falling in the violet and ultraviolet range. Conversely, the color shifts toward red, with the spectrum in the red and infrared range. The color of a torch is the result of the combustion of a mixture of gases, with various colors overlapping together.

It should be related to gas purity and combustion temperature.

The color of the flame is related to the hydrogen-to-carbon ratio in the exhaust gas; since the oxygen content in the atmosphere can be considered constant, a higher hydrogen-to-carbon ratio in the exhaust gas results in a pale blue flame； When the hydrogen-to-carbon ratio is low, there is insufficient air supply for the flue gases; in other words, not enough oxygen is available to burn the carbon-containing gases in those flue gases. Under such conditions, the flame appears yellow or orange-yellow.

The color of the flame is related to the hydrogen-to-carbon ratio in the exhaust gas; since the oxygen content in the atmosphere can be considered constant, a higher hydrogen-to-carbon ratio in the exhaust gas results in a pale blue flame； When the hydrogen-to-carbon ratio is low, there is insufficient air supply for the flue gases; in other words, not enough oxygen is available to burn the carbon-containing gases in those flue gases. Under such conditions, the flame appears yellow or orange-yellow.

I haven’t thought about this issue in detail, but from practical experience, it seems that what the two people above said makes some sense. In the past, after probing a gas generator, experienced workers could roughly determine the calorific value of the gas and the operating condition of the furnace by observing the length and color of the flame coming from the flame detection hole. The combustible components of gas produced by mixed-fuel generators are mainly carbon monoxide, hydrogen, and methane. The flame is short and intermittent; when the calorific value of the gas is low, the flame is long and orange-red in color, while a higher calorific value of the gas results in a longer flame. When the gas in the sampling bag was ignited, the flame appeared as a gentle blue color; tests showed a high hydrogen content, and the calorific value was not very high (the saturation temperature was too high, resulting in less methane). CFB boilers use diesel for bottom ignition; if, when viewed through the observation ports, the flame appears bright and white, it indicates that the temperature is too high, and the fuel supply should be reduced, otherwise the ignition cylinder may get damaged. If the flame becomes bright while cooking the materials, it indicates that the bed temperature is too high; the coal supply needs to be reduced to avoid high-temperature coking. Orange-red and slightly yellow are the normal colors of combustion.

The heat released after combustion varies, just as there is a difference in temperature between the inner and outer flames of a candle