BOILER AND STEAM GENERATION G N PATEL COLLEGE OF DAIRY TECNOLOLOGY SDAU

1. A PRESENTATIONON
BOILER
BY ANKIT BIHOLA
ROLL NO. : 1(ONE)
REGESTRATION NO. : 14-01-2017
SUBMITTED TO,
MR. R D KATHAROTIYA SIR

2. • BOILER
 Boiler is an apparatus to produce steam.
 Thermal energy released by combustion of fuel issued
to make steam at the desired temperature and pressure.
The steam produced is used for:
1). For generating power in steam engines or steam
turbines.
2). Heating the residential and industrial buildings.
3). Performing certain processes in the sugar mills,
chemical and textile industries.

3. • Selection of boiler:
• The working pressure &quality of
steam.
• Steam generation.
• Floor areaavailable.
• Accessibility for repair &inspection.
• Comparative initial cost.
• The fuel &wateravailable.
• Operating &maintenancecost.

4.  BOILER PROPERTIES
a) Safety: The boiler should be safe under the operating
conditions.
b) Accessibility: the various part of boiler should be accessible for
repair & maintenance.
c) Capacity: Should be capable of supplying Steam according to
the requirements.
d) Efficiency: Should be able to absorb a maximum amount of
heat produced due to burning of fuel in the furnace.
e) It should be simple in construction.
f) Its initial cost and maintenance cost is low.
g) It should be capable of quick starting and loading.

8. • Setting

10.  CLASSIFICATION OF BOILERS
Theboiler maybeclassifiedas:
1. Horizontal, vertical or inclined
2. Fire tube &water tube
3. Externally fired &internally fired
4. Forced circulation &internally fired
5. Highpressure &low pressure
6. Forced circulation &natural circulation
7. Stationary &portable
8. Singletube &multi tube boilers

11. 1. Horizontal , vertical or inclined
• If the axisofboiler ishorizontal, the
boiler iscalled horizontal.
• If the axisisvertical then it iscalled
vertical.
• If the axisisinclined then it iscalled
inclined.
• Advantage ofhorizontal boiler:
a. it shouldbe repaired easily.
b. occupieslessfloor area.

12. 2. Fire tube & water tubeboiler
• In the fire tube boiler the hot gasesare inside
thetubes &the water surrounds in the tube.
ex. Cochran, locomotive etc.
• In the water tube boiler the water isinside
thetube &the hot gasesare surround them.
ex. Stirling

13. 3. Externally & internally fired
• The boiler isknownasexternally fired ifthe
fire outside the shell.
ex. Babcock&wilcox
• I n caseofinternally fired boilers, the furnaceis
locatedinsidethe boiler shell.
ex: cochran, lancashire etc.

14. 4. Forced circulation & natural circulation
• I n forced circulation type ofboilers thecirculation of
water isdone byforced pumps.
ex. Velox,lamont .
• I n natural circulation type of boiler the circulation of
water in boiler takes place due to natural convention.
ex. Lancashire, babcock.

15. 5. High pressure & low pressure boilers
• The boilers whichproduce steamat pressure of
80 bar andaboveare calledhighpressure
boiler.
ex. Velox
• The boiler which produce steam at
pressure below 80 bar are called low
pressure boiler. ex. cochran

16. 7. Single tube multi-tube boilers
• The fire tube boilers are classifiedassingle
tube&multi tube boilers, dependingupon the
fire tube isone more than one.
• Ex: cornishboiler

17. Boiler mainly classified as:
a. fire tube
b. water tube

18. a). FIRETUBE BOILERS

19. b). WATERTUBEBOILERS

20. Comparison between Fire-tube & water-tube boilers
Sno. Particulars Fire tube boilers Water tube boilers
1. Modeof firing Internally fired Externally fired
2. Rate ofsteam production lower Higher
3. construction Difficult Simple
4. transportation Difficult Simple
5. Treatment of water Not so necessary More necessary
6. Operating pressure Limited to 16 bar Under highpressure as100 bar
7. Floor area More floor area Lessfloor area
8. Shell diameter Largefor same power Smallsame power
9. explosion Less More
10. Riskof bursting lesser More risk

21. Difference between water
tube boiler and fire tube
boiler