 ### Boiler calculations for Boiler operation Engineer Exam (BOE)

Feb 12, 2021 · 1-Oxygen percentage in Boiler outlet flue gas is 4.9%, then what will be the percentage of excess air? We have excess air EA = O2 X 100 / (21-O2) EA = 4.7 X 100 / (20-4.7) EA = 30.71%. 2-Calculate the Oxygen level (O2) in flue gas, if excess air is 25%. We have Excess air EA = O2 X 100 / (21-O2) 25 = O2 X 100 / (21-O2) O2 = 4.2%

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Power 101: Flue Gas Heat Recovery in Power Plants, Part I

Get A Quote ### Flue Gas Temperature and Heat in the Flue Gas Flow (Btu

Combustion of fuel release flue gases which is a mixture of Carbon Dioxide, Carbon Monoxide, Sulfur Dioxide, H 2 O Vapor, Nitrogen or Nitro-Oxides, Oxygen and ash particles. The quantity of flue gases is also calculated using stoichiometry calculation when air reacts with the fuel.

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Validated methods for flue gas flow rate calculation with

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Flue Gas Temperature and Heat in the Flue Gas Flow (Btu

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The losses caused by the sensible heat of flue gases can be calculated as: m& i φ L 3 = m& fuel ⋅ ∑ ⋅ hi (11) i m& fuel where m& fuel is the fuel mass flow [kg/s], m& i the mass flow of a flue gas component, and hi the specific enthalpy of a flue gas component (e.g. CO2) [kJ/kg].

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The composition of the dry flue gas leaving the boiler at 700oC are found to be 0.9% O 2, 9.7% CO 2, 0.02% CO and the balance N 2 •Sketch a process flow diagram of the above process •Construct a Sankey diagram showing the percentage of heat available and losses from various sources •Calculate the combustion and thermal efficiencies of the

Get A Quote ### Power 101: Flue Gas Heat Recovery in Power Plants, Part I

Apr 19, 2021 · We have excess air EA = O2 X 100 / (21-O2) EA = 4.7 X 100 / (20-4.7) EA = 30.71% 2-Calculate the Oxygen level (O2) in flue gas, if excess air is 25% We have Excess air EA = O2 X 100 / (21-O2) 25 = O2 X 100 / (21-O2) O2 = 4.2% 3-A Boiler's combustion system requires 5.5 kg of air for burning 1 kg of fuel, then calculate the total air required for complete combustion if its flue gas has 4.1% of O2 We have, Total air = (1 + EA/100) X Theoretical air EA = O2 X 100 / (21-O2) EA = 4.1 X 100

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compared with the flue gas volume per unit mass. The flue gas volume is derived from the combustible material in the fuel - and only the combustible material contributes to the calorific value. When the flue gas volume, per unit mass, is divided by the heating value, per unit

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Flue Gas Temperature and Heat in the Flue Gas Flow (Btu

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