babcock and wilcox boiler

1. Present by : Mehta Harshil
Enrollment no : 140160109007
Electrical department
GEC MODASA

2. General :
This boiler is
used when
pressure is above
10 bar
Capacity :
7000 kg of
steam/hr
It is used to
operate high
pressure.

3. Characteristics of Boiler
Horizontal boiler
Water – tube boiler
Stationary boiler
Externally boiler
Multiple tube boiler
Natural circulation boiler
High pressure boiler

4. Specification of boiler
 Diameter of drum : 1.22 to 1.83 m
 Length : 6.096 to 9.144 m
 Size of water tube : 7.62 to 10.16 cm
 Size of superheated tube : 3.84 to 5.71 cm
 Maximum working pressure : 41 bar
 Maximum steaming capacity : 40,000 kg/hr
 Efficiency : 60 to 80 %

5.  This headers are
connected to a
inclined water
tubes. The water
tube inclined to
the horizontal
about 15ansh. The
baffles plate are
provided in order
to make
circulation of hot
gases in sine waves
form. A damper is
fitted at back of
the boiler to
regulate draught.

6. The damper control the flow of air into the
furnace. Water is heated by hot gases coming
from furnace. Due to heating of water density
of water decreases. Low density water move
upwards in water tube and finally water
converted into the steam. This cycle repeat
continuously. The steam flows in super heater
tubes and is finally taken out through the main
steam stop valve and supplied to the engine
when needed in the end of the process mud
collector is provided to remove the mud
particles through a blow down cock.

7. 1. It uses both solid as well as liquid fuel for
burning.
2. The draught losses as compared to other boilers
is minimum.
3. As compared to other boilers the evaporative
capacity is high.
4. The circulation of water is natural.
5. The defective tubes can be replaced easily.
6. It is used in power stations for generating large
quantity of steam.

8. USE