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Real Flue Gas Flow


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#1 tlk

tlk

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Posted 04 February 2015 - 03:33 AM

Hi, I need some help to calculate the real flu gas flow at the given temperature.

 

A steam power plant fuelled on coal (composition given below) needs to invest in a sulphur-cleaning unit. Before this, they need to know how much total flue gases the scrubber unit should treat and the mass flow of SO2 passing the equipment per minute. 
Also, since a tax on carbon dioxide will soon be introduced in the country where the power plant is situated, they also need information on how much CO2 is emitted each year.

 

Flue gas temperature                                              185C (before the sulphur scrubber
Power plant operation hours per year                     8000  h 
Air excess for combustion (air factor)                      m = 1.25  Assume dry air where N2 = 3.77 O2 [mol] 
Fuel flow                                                                   5 kg/s (total mass basis) 
Density of SO2 at normal conditions                         2.9214 kg/mn
Density of CO2 at normal conditions                         1.9783 kg/mn

I have some more data I have calculated:

% wet

C= 4.28

H2=3.22

O2=5.8

N2=2.11

S=2.67

Ash=23.92

Water =8% = moisture content

 

air in axcess m= 1,25

Stoichometric O2 =52.22 mol/kg

Total theoretical air need =  249.1 mol/kg

Total air needed 311.375

 

N2=0.754mol/kg

N2 in air =196.88 mol/kg

theoretical gas amount =197.634 mol/kg

 

real total gas= 463.36 mol/kg *0.0224= 10.38 m3/kg

real totat air = 6.98 m3/kg

 

Please help me to calculate the real flue gas flow at the given temperature.


Edited by tlk, 04 February 2015 - 05:20 AM.


#2 thorium90

thorium90

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Posted 13 March 2015 - 12:45 PM

I think you might find the attached document below useful.

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