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The combustion air will not be able to go out the chimney. Since it has to go somewhere it will leak out the boiler into the boilerroom. If the boiler is air tight the pressure inside the boiler furnace will become high enough that the air will surge or run backwards out the forced air fan. This could lead to combustion outside the boiler, explosion or at least filling the boiler room with smoke and poisonous gasses.
The flue on our gas fired hot water system once became jammed shut. It was the smell of incomplete combustion that alerted me to a problem. If it had happened when everyone was asleep or no one was home, the house would have filled with carbon dioxide.
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∙ 12y ago
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Use Flue in a sentence?
the flue pipe from my boiler runs directly to the hole in the chimney
Why direction of water and flue gases are opposite in bacock and wilcox boiler?
because of heat transfer rate is better
Why goose neck is used in boilers?
goose neck have following two functions: 1. It increase the speed of flue gas in convective zone of the boiler, as velocity increase heat transfer rate also increases which is necessary for super heaters. 2. It divert the path of flue gas and spread it in all corners of the boiler,...
How do you increase boiler efficiency?
we can increase boiler efficiency by recovering the heat which is being carried by flue gases.by incorporating different things like Economizer, Air pre-heater , Super-heater and feed-water heater, we can there ll be notable increase in efficiency of boiler.
What is the Function of economizer in boilers?
Basically . economiser is located in between exit of boiler and entry of air preheater. when the flue gases are coming out from boiler they take away a lot of heat. economiser utilize this heat from flue gases. and these heat is used to heat the feed water which is going to feed the bolier. hence by using economiser the coal consumption required to heat the feed water is reduced hence cost reduced.
What is the correct flue classification for a solid fuel boiler when connected to a brick flue?
class 1.
Use Flue in a sentence?
the flue pipe from my boiler runs directly to the hole in the chimney
What causes small external oxidation sites on a boiler flue that connects directly to the chimney?
plumbing your toilet into the boiler
What is an atmospheric boiler?
ATMOSPHERIC BOILERa boiler on which combustion air/flue gases are drawn through the boiler without a fan.(Taken directly from the Crown Boiler Co. web-site.)
What is the purpose of a bypass on an industrial boiler economiser?
If the boiler fuel contains Sulphur (and most do) combustion products in the flue gas will include Oxides of Sulphur (SO2 and SO3). SO3 combines with water (H2O) to make Sulphuric Acid (H2SO4). If the temperature of the flue gas falls below the dew point, the combination of the acid with the moisture in the flue gas causes corrosion of the flue gas duct work. Bypassing the economiser in the early stages of a boiler start keeps the flue gas temperature above the dew point.
What is the meaning of flue gas?
Flue gas is a type of exhaust gas that exits the atmosphere through a pipe often called a flue. Flue gas can be seen exiting power plants, a fireplace, oven, boiler or steam generator.
What is economizer in boiler?
Economizer is an accessory of boiler that recovers the waste heat from the flue gas blown out of the boiler. Thus it actually "economizes" the operational cost or in other words, improves the efficiency of fuel utilisation in the boiler. The temperature of the flue gases ( the mixture of burnt fuel & air ) depends up on the steam pressure ( temperature more precisely ). Higher the steam pressure generated, the higher is the flue gas temperature. Economizer is a heat exchanger which exchanges heat between water ( which is fed in to the boiler ) & the flue gas. It means it increases the temperature of the feed water using the otherwise wasted heat of the flue gas. So the water entering the boiler has higher temperature compared to the one without this economizer. This higher temperature of water requires less amount of heat to generate steam so the operation becomes "economical". Similarly the economizer can also work to heat up the air entering the boiler through the flue gas heat, instead of heating the water.
What is boiler draught?
The flow of flue gases in chimney due to difference in pressure i.e cold atmospheric air outside and hot gases in chmney is called as boiler draught.
Why direction of water and flue gases are opposite in bacock and wilcox boiler?
because of heat transfer rate is better
What is the need of Purging in boiler?
purging is a cleaning process which cleans explosive items in air,flue gas path if any.
Boiler goes out after few mins?
Look at the control board for any flashing light for a diagnostic code, without the make and model # I can tell you there are several areas that can be causing this, low or high water level, high temps, the flue being blocked or the pressure switch not closing etc.
What is the function of economizer in bent tube boiler?
The flue gases, after leaving the main boiler and the superheater, will still be hot. The energy in these flue gases are used to preheat the already preheated feed water once more by means of the economizer. The economizer is a heat exchanger mounted in the first part of the chimney to improve the thermal efficiency of the boiler. In broad terms a 10°C increase in feed water temperature entering the boiler will give an efficiency improvement of 2% of last mentioned.
