Mechanical Engineering questions and answers. A kg of coal per second are consumed by a steam boiler plant and produced kg of dry flue gas per kg of coal fired. The air temperature outside is 320C, the average temperature of the flue gas entering the chimney is 3430C and the average temperature of the flue gas in the chimney is 2600C.
WhatsApp: +86 18838072829Question No. 3: kg of coal per second are consumed by a steam boiler plant and produced kg of dry flue gas per kg of coal fired. The air temperature outside is 32oC, the average temperature of the flue gases entering the chimney is 343oC and the average temperature of the flue gas in the chimney is 260oC.
WhatsApp: +86 18838072829The gage fluid specific volume is m3/kg and a. kg of coal per second are consumed by a steam boiler plant and produced kg of dry flue gas per kg of coal fired. The air temperature outside is 32°C, the average temperature of the flue gases entering the chimney is 343°C and the average temperature of the flue gases in the ...
WhatsApp: +86 18838072829Where L= B. t. u. lost per pound of fuel, weight of flue gases in pounds per pound of dry W= coal, T= temperature of flue gases, t = temperature of atmosphere, = specific heat of the flue gases. The weight of flue gases, W, per pound of carbon can be computed directly from the flue gas analysis from the formula: 11 CO2 + 8 O + 7 (CO + N)) 3 ...
WhatsApp: +86 18838072829Flue Gas Composition Calculator. Input Parameters: Fuel Type: Choose the type of fuel being burned, such as coal, natural gas, oil, etc. Fuel Composition: Provide the percentages of elements in the fuel, like carbon, hydrogen, sulfur, etc. Combustion Efficiency: This parameter represents how effectively the fuel is burned. It's a ratio of useful energy produced to potential energy in the fuel.
WhatsApp: +86 18838072829If the gas is burnt in a furnace with 20% excess air, calculate a. the amount of air required per 100 kmol of gas, b. The amount of flue gas produced per 100 kmol of gas, c. the composition of the flue gases, on a dry basis. Assume complete combustion.
WhatsApp: +86 18838072829If the gas is burned in a furnace with 20% excess air, calculate i. The amount of air required per 100 kmol of gas; ii. The amount of flue gas produced per 100 kmol of gas; iii. The composition of the flue gases, on a dry basis. Assume complete combustion.
WhatsApp: +86 18838072829In the flue gases, nitrogen comes from the fuel composition and from the combustion air, consisting of 79% of the nitrogen. Nitrogen volume: (26) V N 2 0 = 22, 41 28 ⋅ N i 100 + 0, 79 ⋅ V a 0 m N 3 N 2 kg fuel. Total stoichiometric volume of dry flue gas will be: (27) V g u o = V CO 2 + V SO 2 + V N 2 o = 22, 41 100 C i 12 + S i 32 + N i 28 ...
WhatsApp: +86 18838072829Linked Problems 6 7 A gas producer yields a gas containing % CO2, % H2, % CO, % CH4, and % N2. The coal fired contains % C, % moisture, % ash, and negligible N and S. Tar formation can be neglected. Calculate the following quantities. 6. cubic feet of gas produced (dsc) per pound of coal fired. a. b. c ...
WhatsApp: +86 18838072829Therefore the quantity of oxygen required for combustion of 1 kg of the fuel is: ( + 8H + S) kg. If the fuel contains O kg of oxygen; then it is taken into account. ∴ Oxygen required from air for the complete combustion of fuel will be ( + 8H + S O) which can be written as + 8 (H O/8) + S, the term in the bracket being ...
WhatsApp: +86 18838072829If the molecular. In a steam power plant, 5 kg of coal is consumed per second and it was later found that 25 kg of dry flue gas is produced per kg of coal fired. Air enters at 250C. The average temperature of the flue gas inside the chimney is 2500C. A draft of 5 cm of water at the base of the chimney is needed.
WhatsApp: +86 18838072829Coal composition is taken from Table 1. Airfuel ratio is defined by weight; for example, airfuel ratio of 12 represents combustion of 100 g coal with 1200 g air. Table 5. Equilibrium flue gas composition upon combusting % S coal in a partial combustion condition (vol.%, airfuel ratio of 6, calculated)
WhatsApp: +86 18838072829How many lbs of clinker are produced per 100 pounds of coal? Two methanolwater mixture are contained in separate flasks. The first mixture contains 40 wt% methanol, and the second contains 70 wt% methanol. ... A mixture of dry flue gases and acetone at a pressure of 750 mm Hg and a temperature of 30o C has a dew point of 25 o C is proposed to ...
WhatsApp: +86 18838072829Flue gas is gas that exits to the atmosphere via a flue which may be a pipe, channel or chimney for conveying combustion product gases from a fireplace, oven, furnace, boiler or steam generator.. Flue gases are produced when coal, fuel oil, natural gas, wood or any other fuel is combusted in an industrial furnace or boiler, a steam generator in a fossil fuel power plant or other combustion ...
WhatsApp: +86 18838072829A coal fired steam boiler uses 3000 kg of coal per hour. Air required for combustion is kg/ kg coal at barometric pressure of kPa. The flue gas has a temperature of 285°C and an average molecular weight of 30. Assuming an ash loss of 11% and allowable gas velocity of m/s, find the diameter of the chimney. a.
WhatsApp: +86 18838072829The calorific value of coal varies considerably depending on the ash, moisture content and the type of coal while calorific value of fuel oils are much more consistent. The typical Gross Calorific Values of some of the commonly used liquid fuels are given below: 1. Fuels and Combustion Bureau of Energy Efficiency 2 2/23/2005 11:18 AM ...
WhatsApp: +86 18838072829The gage fluid specific volume is / kg. if the molecular. In a steam power plant, 5 kg of coal is consumed per second and it was later found that 25 kg of dry flue gas is produced per kg of coal fired. Air enters at 25°C. The average temperature of the flue gas inside the chimney is 250°. A draft of 5 cm of water at the base of the ...
WhatsApp: +86 18838072829All of the sulfur burns to SO2, which is included in the CO2 figure in the gas analysis (, CO2 + SO2 = %). Calculate pounds of coal fired per 100 lb mol of dry flue gas as analyzed. Ratio of moles of total combustion gases to moles of dry air supplied. Total moles of water vapor in the stack gas per 100 lb of coal if the entering air ...
WhatsApp: +86 18838072829Korcak Overview of Combustion and Its Byproducts During combustion, fly ash, bottom ash, and boiler slag are produced. Fly ash produced from the burning of coal has become a generic term for all types of coal combustion byproducts.
WhatsApp: +86 18838072829Calculate a. Pounds of coal fired per 100 lb mol of dry flue gas as analyzed b. Ratio of moles of total combustion gases to moles of dry air supplied c. Total moles of water vapor in the stack gas per 100 lb of coal if the entering air is dry d. Percent excess air
WhatsApp: +86 18838072829The composition of a gas derived by the gasification of coal is by volume percentage: carbon dioxide 4, carbon monoxide 16, hydrogen 50, methane ... 20% excess air, calculate i. The amount of air required per 100 kmol of gas; ii. The amount of flue gas produced per 100 kmol of gas; iii. The composition of the flue gases, on a dry basis. Assume ...
WhatsApp: +86 18838072829The amount of heat contributed by the combustion of sulfur in coal is relatively small, because the heating value of sulfur is only about 4,000 Btu per pound, and the sulfur content of coal generally averages 1 to 2 percent by weight.
WhatsApp: +86 18838072829Cp = Mean specific heat of superheated steam in exhaust gases, tf = Temperature of flue gases leaving chimney, tb = Temperature of the boiler room, and; hb = Sensible heat of water at boiler room temperature. 3. Heat lost to steam formed by combustion of hydrogen/kg of fuel. Let. H2 = weight of hydrogen present per kg of fuel.
WhatsApp: +86 18838072829the water produced by the combustion of H 2 is = mol O 2. We know that 1 K mole of H 2 combines with ½ K mol O 2 to produce water. Therefore the amount of hydrogen present is = mol/100K mol of dry flue gases, and the carbon present is = /100K mol of dry flue gas.
WhatsApp: +86 18838072829Question: A coal has the following composition by mass on a dry basis: . . C 88%, H2 3%, O2 4%, S 1%, ash 3% and N2 1%. Calculate the minimum mass of air required for complete cobstion of kg of this fuel. If the excess air suppliedis 30%, find the total mass of dry flue gases per kg of tueh and the percentage composition of the dry flue gases by volume. 15:47 kg;
WhatsApp: +86 18838072829the resistivity of fly ash after coalfired boilers varies with the flue gas temperature. the normal esp operating temperature of around 150°C is typically near the maximum resistivity of the ash ...
WhatsApp: +86 18838072829Then, calculate the pulverized coal mass flow through the respective flue gas components and the actual mixed flue gas components. Calculation scheme of pulverized coal mass flow In this paper, a feasible calculation method of pulverized coal mass flow is obtained after strict derivation, as shown in Fig. 2.
WhatsApp: +86 18838072829Gravemetric percentage analysis of coal was C=78, H_2=6, O_2=3 and incombustible = 13. Estimate : (i) Weight of dry flue gases per kg of fuel. (ii) Weight of excess air per kg of fuel. StepbyStep. Verified Answer. Report Answer. This Question has been Answered. Subscribe to unlock this answer and thousands more StepbyStep Answered Questions.
WhatsApp: +86 18838072829O O kg of coal per second are consumed by a steam boiler plant and produced kg of dry flue gas per kg of coal fired. The air temperatu outside is 32°C, the average temperature of the flue gases entering the chimney is 343°C and the average temperature of the flue gases in the chimney is 260°C.
WhatsApp: +86 18838072829Coal combustion products and byproducts can cause environmental problems if the combustion process is not properly conducted. The fuel, whose analysis provided: 74% Of C, 14% of H, and 12% of ash, is burned causing a combustion gas containing % OF CO2, % of CO, % of O2 and % of N2 on a dry basis.
WhatsApp: +86 18838072829How can burning 2,000 pounds of coal yield more than 4,000 pounds of carbon dioxide? When coal is burned, the carbon in the coal combines with oxygen to form carbon dioxide. One molecule of carbon dioxide is times heavier than a molecule of carbon, due to the additional weight of the two oxygen atoms. Coal is not 100 percent carbon ...
WhatsApp: +86 18838072829Pounds of coal fired per 100 lb mol of dry flue gas as analyzed b. Ratio of moles of total combustion gases to moles of dry air supplied c. Total moles of water vapor in the stack gas per 100 lb of coal if the entering air is dry d. Percent excess air Answer : The Orsat Gas analysis is used when the reaction of combustion is studied.
WhatsApp: +86 18838072829The gage fluid density is /m3 and the theoretical draft of of H20. A steam boiler plant consumes 8,800kg of coal per hour and produces 20kg of dry flue gases per kg of coal fired. Outside air temperature is 34°C, average temperature of the flue gas entering the chimney is 343°C and average temperature of dry flue gas in the ...
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