Numerous
burners are located inside the boiler. The pulverized
coal is blown into the boiler where it ignites
spontaneously at temperatures of up to 3,000 degrees
Fahrenheit. The purpose of the boiler is to turn water
into steam.Air is drawn into the plant by huge force-draft fans. As the air enters the plant it passes through a heat exchanger that transfers heat from outgoing exhaust gases to the incoming air.
Approximately half of the heated air is channeled through the coal pulverizers to dry and blow the coal into the boiler. The other half goes directly to the boiler for combustion.
The hot gases resulting
from combustion are drawn through the boiler and the heat
exchanger (where incoming air is warmed). The exhaust
gases then travel to the scrubber.
