In a thermal power plant, feed water from feed water pump enters the boiler through the __________.

The correct answer is option 1.

Components of Steam Power Plant

1.) Coal and ash handling plant

• The coal from the storage plant is delivered to the coal handling plant where it is pulverized (i.e., crushed into small pieces) to increase its surface exposure, thus promoting rapid combustion.
• The pulverized coal is fed to the boiler by belt conveyors. The coal is burnt in the boiler, and the ash produced after the complete combustion of coal is removed to the ash handling plant and then delivered to the ash storage plant for disposal.
   

2.) Boiler

• The heat of the combustion of coal in the boiler is utilized to convert water into steam at high temperatures and pressure.
• The flue gases from the boiler make their journey through the superheater, economizer, and air pre-heater and are finally exhausted to the atmosphere through the chimney.
   

3.) Superheater

• The steam produced in the boiler is wet and is passed through a superheater where it is dried and superheated by the flue gases on their way to the chimney.
   

4.) Economiser

• The feed water is fed to the economizer before supplying to the boiler.
• ​The economizer extracts a part of the heat of flue gases to increase the feed water temperature.
   

​5.) Air preheater

• An air preheater increases the temperature of the air supplied for coal burning by deriving heat from flue gases.
   

6.) Steam turbine

• The heat energy of steam when passing over the blades of the turbine is converted into mechanical energy.
   

7.) Alternator

• The steam turbine is coupled to an alternator. The alternator converts the mechanical energy of the turbine into electrical energy.