Coal Combustion Calculations

Coal Ultimate analysis calculation on the basis of proximate an Local Coal moisture

%

18

mineral matter

%

30.8

Carbon

%

40

Hydrogen

%

2.19

Nitrogen

%

1.7

Sulphur

%

3

Oxygen

%

4.31

Total

100

Ash

%

28

VM

%

20

GCV

5900

NCV

5683

Diff(GCV/NCV%)

3.68

calculation on the basis of proximate analysis values Afghan

Tajikistan

South Africa 8.31 16.478 72.22 4.52 1.5774 0.65 -3.75 100 14.98 26.13 6496 6220

Indonesia

Coal mix(as fired) 1.75 19.8 71 4.5 1.52 1.3 0.13 100 18 29 6200 5962 0

Minimum & Excess air Calculation for combustion of coal Result Sr. No 1 2 3 4 5 6 7 8 9

Parameters Carbon© Hydrogen(H) Oxygen(O4) Nitrogen Sulphur H2O Ash GCV of Fuel NCV of Fuel

% % % % % % % Kcal/Kg Kcal/Kg

10

burning of Carbon

Kg /Kg fuel

11

burning of Hydrogen

kg/kg fuel

12 13

burning of sulphur Total Stoichiometric Amount of Air Required(S.A)

Kg /Kg fuel Kg /Kg fuel

-

Kg /Kg fuel

-

9.29

Excess Air(EA) Actual Amount of Air Required Actual Amount of Air Required

%

-

10

Kg /Kg fuel

-

10.22

14 15 16

17 18 Combustion gases CO2 N2 O2 SO2 CO H2O

Unit

NM^3/Kg fuel

Input 71 4.5 0.13 1.52 1.3 1.75 18 6200 5962 -

O2 -

N2

Air

1.89

6.34

8.23

0.36

1.21

1.57

0.013 2.136

0.044 7.587

0.057 9.854

of coal Result CO2 -

H2O -

SO2

2.60

0

0

0

0.405

0 0.026