239 posts
calculation of kiln inlet gas composition
how can i calculate the kiln inlet gas composition (CO2,O2,NOx,Sox,H2O) on mass basis as well as volume basis.
details are
coal mix cv 7000 kcal/kg
carbon in mix 85%
hydrogen in fuel 4%
sulfur in fuel 4%
oxygen in fuel 1%
ash 10%
1. heat consumption 820 kcal/kg clinker(SP kiln with unax cooler)
2. Heat consumption 770 kCal/kg cl (SLC kiln dual string grate cooler)
Kiln inlet oxygen 2.5%
raw mix to clinket factor 1.51
CaO in RAw Mix 43%
MgO in Raw Mix 0.6%
Sulfur in Raw Mix 0.1%
waiting
raj
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77 posts
Re: calculation of kiln inlet gas composition
Dear Mr.Raj,
I have doubt about your given coal carbon % against 7000Kcal CV. I have back calculated your CV and calculated combution product as below.
Vikpro
| Coal Ultimate Analysis (A.R) | Product | ||||
| Carbon | % | 74.19 | |||
| Hydrogen | % | 3.81 | |||
| Sulfur | % | 3.81 | |||
| Nitrogen | % | 3.62 | |||
| Oxygen | % | 7.63 | |||
| Ash | % | 9.54 | |||
| Balance Moisture & Dust in coal | % | 4.87 | |||
| Total volatile matter. % | 26.71 | ||||
| Fixed Carbon % | 58.89 | ||||
| Dry Mineral-matter free Fixed Carbon. % | 70.48 | ||||
| Total Balance Moisture. ( Final Product ) % | 2.02 | ||||
| Dust Addition by kiln inert gases. % | 2.8 | ||||
| Hard grove index | 52 | ||||
| Heat Consumption K cal / ton Clinker | 850 | ||||
| Co2 Nm3 | 1.39 | ||||
| H2O Nm3 | 0.45 | ||||
| So2 Nm3 | 0.027 | ||||
| N2 Nm3 | 6.26 | ||||
| One kg of fuel combines with Nm3 Air. | 7.83 | ||||
| Combustion gases per kg of fuel in Nm3 | 8.12 | ||||
| Gross CV as per calculation | 7004 | ||||
| Net CV as per calculation ( As received BIN ) | 6808 | ||||
239 posts