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From Fuel to Power
1. Coal 2. Coal hoppers 3. Coal mill 4. Air and coal dust 5. Burners 6. Fireball 7. Bottom ash 8. Turbine 9. Generator 10. Condenser 11. DeNox plant 12. Electrostatic precipitator 13. ID fan 14. Desulphurisation plant 15. Stack
The coal is transported from the storage site to the coal hoppers. It is then removed from the hoppers as required and transported to the mills, where it is ground into a fine dust. From the mills, the coal dust is mixed with the combustion air and sent to the burners of the supercritical boiler.
The coal dust and combustion air mixture is blown into the boiler through the burners and combusted.
The boiler produces steam at high pressure (typically around 300bar) and high temperature (typically around 600°C), which feeds into the turbine to make the turbine blades rotate.
The turbine is connected to the generator, and the rotation of the turbine blades causes a shaft to turn inside the generator, which produces electricity.