Some know how about Boiler

2. BY : Noman Nazir Channa
ROLL NO: L-14ME-45

3. Contents
 Definition
 Classification of steam boiler
 Important terms
 Steam formation
 How to increase efficiency of steam boiler?
 Where to use steam?

4. What is a STEAM BOILER ?
 A closed vessel that heats water to become hot water or
steam .
 It’s function is to transfer the heat produced by the
combustion of fuel to water and generate steam .
 Also called STEAM GENERATOR .

8. IMPORTANT TERMS
 Boiler Shell :
 Made up of steel plates bent into cylindrical form.
 Closed end.
 Should have sufficient storage capacity.

9. Combustion Chamber
 It is the space where fuel burns for producing the
steam from water.
 Grate
 Actually the place in combustion chamber where fuel
burn.
 Consists of Cast Iron bars having sufficient space for
air required for combustion.

10. Furnace
 It is the place in which fuel is actually burnt.
 Also called FIRE BOX.

11. Mountings
 These are the devices mounted on boiler.
 Used for proper functioning.
 Examples:
 Water level indicator
 Pressure gauge
 Safety valve etc

13. Pressure Gauge:
 A pressure gauge is fitted in front of boiler.
 It shows the pressure of steam.
 Usually connected to the steam space.
 Safety Valve:
 Located on top of boiler.
 They guard the boiler against the excessive high
pressure of steam.
 The escape of steam makes a audio noise.

14. Accessories
 Most of the boiler are fitted with accessories.
 Used for increasing the efficiency or help in working.
 Examples:
 Economizers,
 Air pre-heater
 Super heaters
 Feed pumps

15. Steam Formation
 Fresh liquid
 Saturated liquid
 Wet steam
 Dry saturated steam
 Super saturated steam

16. How can we increase the efficiency of boiler ?
.

17. Where to use this steam?
 We can use this steam to operate pumps and
compressors.
 We can use this steam to run a steam turbine for
generating electricity.