## CHIMNEY 1 A boiler uses 2500 kg of coal per hour and air

### Power plant technology (lecture notes) - SlideShare

2014/2/24 · A coal fired steam boiler uses 3000 kg of coal per hour. Air required for combustion is 15.5 kg/kg of coal at a barometric pressure of 98.2 KPa. The flue gas has a temperature of 285 C and an average molecular weight of 30. Assuming an ash loss of 11% and

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2013/3/2 · Most modern water boiler tube designs are within the capacity range 4,500 – 120,000 kg/hour of steam, at very high pressures. Many water tube boilers nowadays are of "packaged" construction if oil and /or gas are to be used as fuel. Solid fuel fired water tube designs are available but packaged designs are less common.

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2. BOILERS Bureau of Energy Efficiency 27 Syllabus Boilers: Types, Combustion in boilers, Performances evaluation, Analysis of losses, Feed water treatment, Blow down, Energy conservation opportunities. 2.1 Introduction A boiler is an enclosed vessel that provides a means for combustion heat to be transferred into

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A boiler uses 2500 kg of coal per hour and air required for combustion is 16 kg per kg of coal. If ash loss is 10%, determine the mass of gas entering the chimney. (42,250 kg/hr) 2.The gas density of chimney is 0.75 kg/m3 and air density is 1.15 kg/m3. If the

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Note: 1 Mark is awarded to all candidate who have attempted this question. 31. The evaporation ratio of a coal-fired boiler is 4. Steam enthalpy is 640 kCal/kg; feed water temperature is 55 0C, Calorific Value of coal is 4000 kCal/kg. The boiler efficiency is a) 70

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CHIMNEY 1. A boiler uses 2500 kg of coal per hour and air required for combustion is 16 kg per kg coal. If ash loss is 10%, determine the mass of gas entering the chimney? A. 42,250 kg/hr C. 85,452 kg/hr B. 78,300 kg/hr D. 33,800 kg/hr 2. 2.

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The quantity of coal used per hour in power plant depends upon many things :-1 Quality of coal 2 Capacity of Unit 3 Efficiency of Boiler and Turbine. Quality of coal - Quality of coal is measured in terms of Calorific Value if coal have higher calorific Value then quantity

Learn More### Solved: 1. If The Air Required For Combustion Is 20 Kg Per | …

Thermodynamics and Heat Engine: LESSON - 30 BOILER ACCESSORIES

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MCQ in Power Plant Engineering Part 9 | ME Board Exam

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A boiler uses 1000 kg of coal/ h. The temperature of hot gases inside the chimney is 650 K and the outside air temperature is 300 K. The draught produced by the chimney of 25 m height is 15 mm of water. Determine the air supplied per kg of fuel burnt, draught

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b) Calculate the equivalent evaporation of a boiler per kg of coal fired, if the boiler produces 50,000 kg of wet steam per hour with a dryness fraction of 0.95 and operating at 10 bar. The coal burnt per hour in the furnace is 5500 kg and feed-water temperature is 40

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31. A boiler uses 2500 kg of coal per hour and air required for combustion is 16 kg per kg coal. If ash loss is 10%, determine the mass of gas entering the chimney. A. 42,250 kg/hr B. 78,300 kg/hr C. 85,452 kg/hr B. 78,300 kg/hr D. 33,800 kg/hr

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air into boiler through burner nozzles • Combustion temperature at 1300 - 1700 C • Benefits: varying coal quality coal, quick -Quantity of steam generated per hour (Q) in kg/hr -Quantity of fuel used per hour (q) in kg/hr -The working pressure (in kg/cm2(g-- • •

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Therefore Total air = (1 + 25.78/100) X 5.5 = 6.92 kg of air per kg of fuel burnt 4-A Coal fired boiler having total heating surface area 5200 M2 produces 18 kg of steam per square meter per hour of heating surface, then calculate the Boiler capacity in TPH

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2020/11/7 · A boiler uses 2500 kg of coal per hour and air required for combustion is 16 kg per kg coal. If ash loss is 10%, determine the mass of gas entering the chimney. A. 42, 250 kg/hr B. 78, 300 kg/hr C. 85, 452 kg/hr D. 33, 800 kg/hr Question: A boiler uses 2500 kg

Learn More### Thermodynamics and Heat Engine: LESSON - 30 BOILER …

30.1. Relative Position of Superheater, Economiser and Air Preheater The relative positions of the air pre-heater, economiser and superheater are shown in Fig. 30.1. 30.2. Economiser Function: The function of the economiser is to extract some heat which is carried away by the flue gases up in the chimney or stack and utilize it for pre-heating the feed water supplied to the boiler.

Learn More### Answered: 1- How much is used/kg of coal burnt in… | bartleby

1- How much is used/kg of coal burnt in a boiler having chimney of 35 m height to create a draught of 20 mm of water, when the temperature of flue gas in the chimney is 370 C and the boiler house temperature is 34 C. Q: Q.2.Air flows through a constant-area duct

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A boiler uses 2500 kg of coal per hour and air required for the combustion in 16 kg per kg coal. If ash loss is 10%, determine the mass of the gas entering the chimney. Answer: A A. 42,250 kg/hr B. 78,300 kg/hr C. 85,452kg/hr D. 33,800 kg/hr 2. The gas

Learn More### Power plant and calculations: Questions answers & calculation on Boiler draught & Chimney

2020/6/28 · 38-Calculate the height of the Chimney required to produce a draught equivalent to 20 mmwc if the temperature of the FG is 180 deg c and ambient temperature is 25 Deg C.And air required for complete combustion per kg of fuel is 7 kg. We have formula, Hw = 353 X H (1/Ta – 1/Tg (Ma+ 1)/Ma) Ta = 273 + 25 = 298 K. Tg = 273+180 = 453 K.

Learn More### Power plant and calculations: Questions answers & calculation on Boiler draught & Chimney

2020/6/28 · 38-Calculate the height of the Chimney required to produce a draught equivalent to 20 mmwc if the temperature of the FG is 180 deg c and ambient temperature is 25 Deg C.And air required for complete combustion per kg of fuel is 7 kg. We have formula, Hw = 353 X H (1/Ta – 1/Tg (Ma+ 1)/Ma) Ta = 273 + 25 = 298 K. Tg = 273+180 = 453 K.

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