Flame color of gas boilers
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What is the color of the flame in everyone’s gas boilers? I heard some are blue
The color of the flame doesn’t matter, as long as there is no black smoke. Regarding color: The higher the proportion of C in the CH compounds in the gas, the yellower it appears. A higher proportion of H gives it a bluer appearance. Regarding air volume: the presence of black smoke indicates incomplete combustion, which is usually caused by insufficient air volume, resulting in inadequate utilization of the fuel. A significant deviation of the flame usually indicates that the air flow is too strong, causing too much heat to be carried away by the wind, which also hinders the efficient utilization of heat. The above is under your control. The length, shape, and distribution of the flame. These are issues with burner design. You can’t solve this.
Is the ratio of C to H in gas different in different places? Even if they’re different, shouldn’t they still be more or less the same?
Gas is a general term; LNG, coke oven gas, blast furnace gas, converter gas, generator gas, and the like can all be referred to as gas, with differences in composition and calorific value. In places where steel and iron are produced, several types of gas are usually mixed together before being supplied to users (with different calorific values and levels of toxicity). The color of the flame in the image is very similar to that of the gas produced by a mixed gas generator (whose calorific value is relatively low), as well as to the color produced when diesel burns (whose heat content is very high).
You’re right; I checked online and it’s the same – the higher the temperature, the bluer it becomes. But for the burners I made before, this color is indeed related to the fuel. The color of combustion varies depending on the fuel.
A bright yellow color, like that of an incandescent bulb, would be great; if it’s an orange-red color like Fanta’s, then there’s less air present. Let alone when black smoke is emitted.