Why do some boiler chimneys emit smoke, while others emit steam?
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What is the reason for this? Our boiler is smoking, while the boiler next door is producing steam. Steam keeps coming out non-stop all day long. We produce very little smoke; it’s hardly visible under normal circumstances, with only slightly more smoke appearing when the furnace is in use or when something is not working properly
It’s not steam, is it? I once heard from experienced workers that the smoke coming from the chimney can be used to determine the amount of air supply: if black smoke is emitted, it’s necessary to increase the air supply, while if white smoke appears, the air supply should be reduced. This is all done to ensure that the fuel burns fully.
What comes out of the boiler can’t be steam; it must be white smoke. It was mistaken for steam. Be careful; the boiler is not in its optimal burning condition.
What kind of furnace is it? An industrial furnace? For power plant boilers, be careful not to mistake the cold water tower for a chimney. Last edited by yang*aoguo1 on 2009-2-16 at 16:22.]
The boiler chimney shouldn’t be emitting steam; is there a problem with the boiler’s combustion?
If it’s not a cooling tower, it should be emitting white smoke.
Is wet dust removal being used, which is why white smoke is emitted? You use bag dust removal or multi-tube cyclone dust removal, so no white smoke is produced!
Wet dust removal is used, so there should be some water vapor emitted; this is because the chimney in my factory has poor airflow at the top, which causes many water droplets to fall.
The dust removal equipment uses wet dust removal. The flue gas has a high moisture content. If the temperature in the boiler’s rear flue is too high, water vapor will be generated. A dry cyclone dust collector is used. If the air distribution in the boiler is not adjusted properly. The excess air coefficient is too high. The residence time of flue gas in the furnace is short. The exhaust temperature is too high. The density difference between the flue gas and air is significant. White smoke columns that resemble steam may be produced visually. It’s like the heat waves moving over asphalt roads in summer. My personal opinion is for reference only.
It’s possible; if it’s winter, the water vapor in the smoke cools down at the chimney outlet and condenses into mist, giving it the appearance of white smoke
Our exhaust temperature is relatively low, and white smoke often appears. Coal-fired boilers tend to emit black smoke when they burn incompletely. The gas boiler often emits steam; incomplete combustion does not result in black smoke. I guess the boiler next to you is running on gas.
It is related to fuel and dust removal methods. Your facility might burn anthracite coal ； While the adjacent area might use bituminous coal with wet dust removal ； When hot flue gas passes through a wet dust collector, water vapor is carried into the chimney; as it passes through the chimney, it cools and turns back into water, causing the flue gas to appear white.
Yes, it is related to the fuel and dust removal methods, as well as the exhaust gas temperature.
It depends on the type of fuel used. If it’s natural gas or gas, it’s likely steam that is produced as a result of combustion; if the fuel emits white smoke, it’s probably due to an excessive amount of air being supplied. Black smoke is caused by insufficient air supply and incomplete combustion.
When the gas stove emits white smoke, that’s the white smoke we’re seeing. Black smoke indicates that the airflow to the furnace is too low, which is not allowed
I’d like to ask those upstairs: how tall is your chimney? Ours is over 140 meters tall, and it’s not easy to tell what color of smoke it emits
If a wet dust collector is used, in winter when temperatures are low, the smoke emerging from the chimney contains water vapor; upon contact with the cold air, this vapor turns into water droplets. In summer, white smoke generally does not appear. It’s actually quite simple to determine whether it’s smoke or steam: if it’s smoke, it will drift far away, while if it’s steam, it will disappear near the chimney outlet.
Hehe, the steam is produced because the temperature of the surrounding air is low, leading to vaporization. It depends on what the fuel being burned is made of, as well as the amount of air supplied. Black smoke may indicate incomplete combustion; it could also be due to secondary combustion. Light brown smoke suggests more complete combustion, while white smoke is likely just exhaust gas, indicating good combustion efficiency — Dongguo Energy Saving
There are two possibilities: 1: Wet dust removal is used; 2: The boiler tubes burst, allowing water to enter the furnace.
Wet flue gas desulfurization definitely produces white smoke; that’s water vapor! Water film dust removal also produces white smoke; that’s water vapor too!
Now, many conventional power plants have desulfurization devices installed on their boilers, but no high-efficiency GGHs; as a result, the flue gas temperature is low, and the smoke emitted from the chimneys contains water vapor.