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Associate

Join Date: May 2012
Posts: 26

So2 Emission Calculation

12/26/2012 1:38 AM

Sir

we want to calculatethe So2 emission on basis of following data for boiler ,

CARBON AS C% W/W 40.472.

HYDROGEN AS H% W/W 4.363.

NITROGEN AS N%W/W NIL4.

SULPHUR AS S% W/W .25.

stack temp 170 Deg C

fuel cons 17 ton/hr

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Guru

Join Date: Oct 2007
Location: India
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#1

Re: So2 emission calculation

12/26/2012 2:07 AM

IMHO it is not practical to calculate. The best solution is to measure it.

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#2
In reply to #1

Re: So2 emission calculation

12/26/2012 4:10 AM

Sir

Actually we need to calculate the height of chimney for new boiler so that i need the so2 emission

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Guru

Join Date: Oct 2007
Location: India
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#3
In reply to #2

Re: So2 emission calculation

12/26/2012 7:38 AM

That means, you have an existing chimney. Since your feeds will be similar, the pollutant levels are likely to be same. Could your new proposed chimney height be same as the old one? In any case, you should pose this question to your designer/consultant. It is apparent that you are not the designer/consultant.

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Guru

Join Date: Oct 2008
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#4

Re: So2 emission calculation

12/26/2012 9:36 AM

What's the other 50.915%?

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#6
In reply to #4

Re: So2 emission calculation

12/28/2012 2:04 AM

Sir

rest 50 % is H2O

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Guru
Engineering Fields - Mechanical Engineering - New Member

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#5

Re: So2 emission calculation

12/26/2012 11:04 AM

Dear Mr. Lalit Shukla,

It is very simple. Use the following equations.

1. 12C + 32 O2 = 44 CO2 + Heat

2. 1H2 + 8 O2 = 9 H20 + Heat

3. 32S + 32 O2 = 64 SO2 + Heat

4. NITROGEN WILL NOT UNDER GO ANY CHANGE since it does not enter in to COMBUSTION Mechanism. ( Heat released - I have studied in FPS SYSTEM, and I do not remember in Kilo Calories, pl. refer Std. Text Books or other CR4 Members will tell you.)

You know the fuel analysis and consumption and convert the product of combustion in to Kg.Mol for each gas and calculate the ppm, for each gas. Automatically you will get SO2 EMISSION.

DHAYANANDHAN.S

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Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

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#8
In reply to #5

Re: So2 emission calculation

01/02/2013 8:12 AM

GA.

Explanatory note for the OP: the numbers in front of the chemical symbols in dhayanandhan's equations 1, 2 and 3 are unusually the molecular weights of these species and not the number of moles of each material (usual convention).

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Guru
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#7

Re: So2 Emission Calculation

01/02/2013 8:08 AM

Stoichiometry reveals the answer, and the answer is straightforward arithmetic. Carrying out a mass balance on the incoming materials will reveal the amount of SO2 in the stack gases.

However, in order to calculate the proportion of SO2 in the stack gases it is necessary to know the amount of excess air, which should ideally be zero.

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dhayanandhan (1); Joshi (2); Lalit Shukla (2); lyn (1); PWSlack (2)

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