Power Plant Engineering

STEAM POWER PLANT 165

Coal and

Primary AirA

Sec. Air

Furnace Molten

Slag

Sec.

Air

Coal and

Primary

air

Section at A.A

(c)

(d) (e)

A

Fig. 4.29. Various Types of Burners.

Economizer

Air

Preheater

To s t a c k

Boiler

Tu b e s

Boiler Drum Convection

Super Heater

Water Wall

Pulverised Coal

Burner

Fig. 4.30. Pulverised Coal-fired Boiler.
(i) It saves the cost of pulverisation because of a crusher needs less power than a pulveriser.
(ii) Problem of fly ash is reduced. Ash produced is in the molten form and due to inclination of
furnace it flows to an appropriate disposal system.

Fig. 4.30 shows a pulverised coal-fired boiler.