Question

A thermal power plant has received a coal sample. The plant manager is required to analyse if the auxiliary equipment and the combustion systems are ready for burning this fuel. For determining the suitability of burners and auxiliary systems, some adequate analyses are needed. The coal sample has the following ultimate analysis.

Element Weight / kg

C 0.7300 H2 0.0590 O2 0.0790 N2 0.0270 S 0.0185 Ash 0.0865 Total 1.0000

Determine the amount of air required for complete combustion of this coal.

Calculate the weight of the flue gases produced during the per kg combustion of this coal.

Calculate the volume of flue gases produced by the boiler at 400 K.

Calculate the % of CO2 in the produced flue gases on dry basis.

Calculate the % of CO2 in the produced flue gases on wet basis.

Calculate the % of SO2 in the produced flue gases on dry basis.

Calculate the % of SO2 in the produced flue gases on wet basis.

Calculate the percentage/s by which the fuel element/s need/s to be increased or decreased for reducing the amount of required air by 8%.

Calculate the percentage/s of CO2 and SO2 on dry basis produced after reducing the amount of required air by 8%.

In the light of the recent developments in coal combustion technologies, discuss pros and cons of using coal for

Answer 1