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ATA INPUT FOR COAL FIRED BOILER
el firing rate 21,416 kg/hr
eam generation rate 133,750 kg/hr
eam pressure 98 kg/cm2(g)
eam temperature 540 °C
ed water temperature 215 °C
CO2 in Flue gas 14
CO in flue gas 0.6
erage flue gas temperature 141 °C
mbient temperature 32 °C
midity in ambient air 0.0204 kg / kg dry air
rface temperature of boiler 70 °C
nd velocity around the boiler 3.5 m/s
tal surface area of boiler 1600 m2
V of Bottom ash 800 kCal/kg
V of fly ash 452.5 kCal/kg
tio of bottom ash to fly ash 85:15
el Analysis (in %)
h content in fuel 3.3
oisture in coal 35
rbon content 45
drogen content 3.000
trogen content 0.7ygen content 12.9
V of Coal 4100 kCal/kg
5.70285
0.157078
0.037519.27244 %
36.85436 %
7.804599 kg/kg of co
8.149943 kg/kg of co
Theoretical air required for complete combustion
Moles of N2
Moles of C(CO2)t
STEP 2
STEP 1
STEP 3
STEP 4
STEP 5
% Excess air supplied (EA)
Actual mass of air supplied
Mass of dry flue gas
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rbon 84.8
drogen 11.8
trogen 0.42
ygen 1.3
lphur 1.2
oisture 0.48
CV of fuel 10,500 kCal/ kgel firing rate 8,492.11 kg/ hour
rface Temperature of boiler 70 °C
rface area of boiler 1600 m2
midity 0.0204 kg/kg of dry air
nd speed 3.5 m/s
ue gas temperature 192 °C
mbient temperature 30 °C
2% in flue gas by volume 10.6
2% in flue gas by volume 7.500
14.40865 kg/kg of o
55.55555556 %
22.41345556 kg/kg of fu
22.12289411 kg/kg of o
7.850466996 %
6.644074286 %
0.030029714 %
0.317451377 %
806.3534221 kCal/m2
1290165.475 kCal
1.446906628 %
83.711071 %Boiler efficiency by indirect method
Heat loss due to radiation and convection
Total radiation and convection loss per hour
% radiation and convection loss (L6)
STEP 5 (all loses)
% Heat loss in dry flue gas (L1)
Heat loss due to formation of water from H2 in fuel (L2)
% Heat loss due to moisture in fuel (L3)
% Heat loss due to moisture in air (L4)
Mass of dry flue gas
STEP 1
Theoretical air required for complete combustion
Flue gas analysis (%)
Ultimate analysis (%)
STEP 2% Excess air supplied (EA)
STEP 3
Actual mass of air supplied
STEP 4