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Answer (1 of 3): The rated flue gas exit temperature at the air pre-heater outlet is around 135 deg Celsius in a typical sub-critical boiler. The flue gas temperature should always be maintained preferably within 120 to 150 deg Celsius. If it goes beyond 150 deg Celsius
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Get A QuoteIn this case, the maximum flue gas temperature was 616 K, which is only 2.18% of the percentage deviation from the perfectly mixed flue gas temperature of 597 K. The minimum flue gas temperature, in this case, was 573.6, which is a deviation of 3.91% from
Get A Quotetransfer to the water where various losses by hot flue gas, radiation, unburnt fuel, moisture content of the air and fuel and blowdown etc. as the temperature of the flue gas leaving a boiler typically ranges from 150-250 0C, about 10-40% of the heat energy is
Get A QuoteApp 1-3 Cp is the specific heat of flue gas, usually assumed to be 0.24, FGT is the flue gas temperature, F, CAT is the combustion air temperature, F, HHV is the higher heating value of the fuel, Btu/lb. The formula can be simplified to LDG, % = [24 x DG x (FGT - CAT)] ÷ HHV
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Get A QuoteThe temperature of combustion air, fuel and water entering the boiler is assumed at 25oC. The flue gas leaves the boiler at 300oC (all the water formed will be vapour). In addition, a
Get A Quote12/2/2021 · 11-A 100 TPH coal fired boiler generating 8.5 kg of flue gas (Mfg) per kg of fuel burnt at 150 Deg (Tfg) Calculate the heat loss due to dry flue gas loss. Consider coal GCV 5000 kcal/kg & ambient air temperature 25 Deg C (Ta) Heat loss due to dry flue gas = Mass of
Get A QuoteAt boiler efficiency around 75–80% the increase in fuel consumption is approximately 1% for every 18 C rise in flue gas temperature. Radiation and other losses Every boiler will lose heat by radiation and convection but the heat loss will be reduced if the boiler, its shell or the steam and water drum are effectively lagged and the lagging is kept in good condition.
Get A Quote2 · A boiler needs to be designed to maintain the exit velocity of cooled flue gas at 7000 ft min^-1. The cross-sectional area of the exit duct is currently sized at 4ft^2 through which cooled flue gas with a density of 0.075 lb ft^-3 flows. If it is desired to process a volumetric
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Get A QuoteFlue gases are produced when coal, oil, natural gas, wood or any other fuel is combusted in an industrial furnace, a power plant's steam-generating boiler, or other large combustion device. Flue gas is usually composed of carbon dioxide (CO 2 ) and water vapor as well as nitrogen and excess oxygen remaining from the intake combustion air.
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Get A Quote2 · A boiler needs to be designed to maintain the exit velocity of cooled flue gas at 7000 ft min^-1. The cross-sectional area of the exit duct is currently sized at 4ft^2 through which cooled flue gas with a density of 0.075 lb ft^-3 flows. If it is desired to process a volumetric
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Get A Quote12/2/2021 · 11-A 100 TPH coal fired boiler generating 8.5 kg of flue gas (Mfg) per kg of fuel burnt at 150 Deg (Tfg) Calculate the heat loss due to dry flue gas loss. Consider coal GCV 5000 kcal/kg & ambient air temperature 25 Deg C (Ta) Heat loss due to dry flue gas = Mass of
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