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From Coal to Electricity
Generation of electricity in a typical coal power plant
Before being injected into the furnace, the raw coal is crushed down to a fine pulverized form in the coal mills.
Flue gases up to 1,450 °C arise from pulverized fuel combustion in the steam generator furnace. The liberated heat
is used to generate high-pressure and high-temperature steam.
The steam is directed to a turbine; it flows onto the blade wheels and turns the turbine shaft. An attached generator
then generates the electrical power.
With the help of catalysts, the nitrogen oxides in the flue gas react in the DeNO x system to produce nitrogen and
water vapor.
Ash particles adhere to electrically-charged surfaces in the electrostatic precipitator; they are rapped and removed
from the flue gas.
In the flue gas desulphurization system (FGD) lime slurry or suspended pulverized limestone bind the sulphur dioxide
coming from the flue gas. The final product arising is gypsum.
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