how we can find required combustion air for combustion process in kiln using coal as a fuel.
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Re: combustion air
You need following analysis for coal.
C, H2, S, O2
C+ O2 ....> CO2
2H2 + O2....> 2H2O
S+ O2.....> SO2
So from stoichiometry, you can calculate required O2 for all components and then subtract available O2 with coal.
O2 Req = (O2 for C + O2 for H2 + O2 for S - O2 available)
then you know that air contains 23% O2, so calculate air required as
Air Req= O2 Req* 100/23
In last we need approx 1.5 % excess air for burning
So Actual Air Req For Combustion = Air Req * 1.015
Hope u get the answer
Have a nice day