The illustration depicts how electricity is generated from coal.
Looking from an overall perspective, it is readily apparent that this is a syngas process and subsequent power-generation stages, beginning with the combination of raw coal and oxygen, followed by the conversion of the initial blend into a purified syngas, and ending with the electricity production from two different types of turbines.
The earliest stages involve the transformation of raw substance. Coal is transported by truck and fed onto a ramp, which channels it into a furnace. Simultaneously, oxygen is supplied from a separate facility, initiating the combustion that yields hot exhaust gases and raw syngas, whereas by-products such as slag are diverted elsewhere. There, raw syngas undergoes a removal stage, which then extracts harmful contaminants such as CO2, Mercury, and Sulfur, leaving purified syngas.
The remaining steps involve the generation of electricity. This gas fuels a dedicated gas turbine that connects to a generator, thereby producing electricity. Meanwhile, hot exhaust gases are piped into a specialised heat recovery steam generator to create flue gases, whereupon the resulting steam powers a steam turbine, which is coupled to another generator. In this way, two turbines collaborate in order to maximise output, ensuring efficient power generation from coal.