for diploma students

1. Micro-project
Of basic mechanical engineering subject:
Babcock & Wilcox Boiler Specification

2. PURANMAL LAHOTI GOVT. POLYTECHNIC COLLAGE
With the guidance of:
• Proof. Bhure amol sir
sub . basic mechanical
Resource which used to make the micro-
project:
• Basic mechanical book
• Use of Internet
• Team discussions
• Notes from boiler topic
Student participate in micro-project
Roll no. enrollment no. Student name
61. 2000160260 Shelke pushkar eknath
62. 2000160261 Shinde abhay umakant
63. 2000160262 Shinde pankaj shivaji
64. 2000160263 Shivankar onkar shivaji
65. 2000160264 Tatphale gurunath maroti
66. 2000160265 Tavar rushikesh Ramesh
67. 2000160266 Todkari ritesh ajaykumar
68. 2000160267 Waghmare ganesh balaji
69. 2000160268 Waghmare shubham dilip

4. INTRODUCTION:
ON BABCOCK AND WILCOX BOILER
• Babcock and Wilcox Boiler was discovered by George Herman Babcock and Stephen
Wilcox in the year 1967.
• This is a water tube boiler, used in steam power plants. In this type of boiler, water is
circulated inside the tubes and hot gases flow over the tubes.
• This is a Horizontal drum axis, natural draft, natural circulation, multitubular,
stationary, high pressure, solid fuel fired, externally fired Water tube boiler.

5. FRIST BABCOCK & WILCOX BOILER PHOTO:

6. ;
• This Babcock and Wilcox Boiler is a water tube boiler which is a multi-tubular
• High pressure and externally fired water tube boiler used to generate a large amount
of steam.
• In this article:
• I will explain all the parts of Babcock and Wilcox Boiler along with working
• Part of boiler
• construction
• specifications
• applications
• Advantages
disadvantages

7. PART OF BOILER
• The parts of Babcock and Wilcox Boiler is as follows:
• Steam and water drum (boiler shell)
• Uptake-header and Down Take Header
• Water tubes
• Super heater
• Grate
• Furnace
• Baffles
• Mud box
• Inspection doors
• Water space
• Steam Space
• Water Level Indicator

8. LAYOUT FIGURE OF THE BOILER:

9. THE EXPLANATION OF THE ABOVE PARTS IS AS
FOLLOWS:
• 1. Boiler Shell:
It consists of one or more steel plates bent into a cylindrical form and
riveted or welded together. The shell and ends are closed with the endplates.
• Uptake-header and Down Take Header:
Boiler shell and water tubes are connected by the two tubes. Out of
them, one is Up Take header and the other is Down Take Header.
• Up Take Header:
The steam from the water tubes to the drum flow by means of Up
Take Header.
• Down Take Header:
The water flows from the drum to the water tubes by means of down
take header.

10. 3. Water Tubes:
The angle of inclination of the water tubes to the horizontal is about 15 degrees.
In this boiler, water will flow from the drum by means of tubes only.
4. Super heater:
It increases the temperature of saturated steam.
5. Grate:
It is the platform in the furnace upon which fuel is burnt.
6. Furnace:
It is a chamber formed by the space above the grate and below the boiler shell in
which combustion takes place.
It is also called a firebox.
7. Baffles:
The baffles are provided to deflect the hot flue gases so that the water tubes
experience more amount of heat.

11. 8. Mud Box:
All the impurities which are present in the boiler are deposited at the om and
are stored in the mud box.
9. Inspection doors:
They are provided for cleaning and inspection of the boiler.
10. Water space:
It is the volume of a shell that is covered by water.
11. Steam Space:
The volume of shell except, the volume of water and tube space is called
Steam space.
12. Water Level Indicator:
It is the indicator, which shows the level of water in the shell.

12. WATER LEVEL INDICATOR DIAGRAM:

13. CONSTRUCTION OF BABCOCK AND WILCOX BOILER:
• The Working principle of Babcock and Wilcox Boiler is as follows:
• The entire boiler except for the furnace, are hung by means of metallic slings or straps
or wrought iron girders supported on pillars.
• This arrangement enables the drum and the tube to expand or contract freely.
• The angle of inclination of the water tubes to the horizontal is about 15 degrees.
• A feed valve is provided to fill the drum and the inclined tubes with the water level of
which is indicated by the water level indicator.

14. •Through the fire door, the fuel is supplied to the fire grate and it is burnt. The hot
gases are forced to move upwards between the tubes by the baffle plates.
The system consists of a Down Take Header(DTH) and Up Take Header(UTH)
which consists of holes in which a series of Inclined water tubes are fixed.
•The water from the drum flows through the inclined tubes via down-take header
and goes back into the shell in the form of steam and water mixture via UTH (Up
Take Header).
•The steam is collected in the steam space of the drum.
•The steam enters through the APP(Anti-Priming Pipe) and flows in the ST(Super
heater Tubes), where it converts from Wet steam to Dry saturated steam and it is
taken out from MSV(Main Stop Valve) and feed to the turbine.
• At the lowest point of the boiler, the mud and dirt collect which is pumped out through
Blow-off Cock.

15. SPECIFICATIONS OF BABCOCK AND WILCOX BOILER:
• The specifications of Babcock and Wilcox Boiler is as follows.
• The diameter of the drum = 1.22 to 1.83 m
• Length = 6.096 to 9.144 m
• Size of the Super-heater tubes = 3.84 to 5.71 cm
• Steaming Capacity = 40000kg/h (max)
• Size of the water tubes are 7.62 to 10.16 cm
• Efficiency = 60% to 80%.
• Working pressure = 140 bar (max)

16. APPLICATIONS OF BABCOCK AND WILCOX BOILER:
• The Applications of Babcock and Wilcox Boiler is as follows:
• In power generation industries, the Babcock and Wilcox Boiler is used to produce high
pressure steam.
• The steam generated is used to produce large amount of electricity.

17. ADVANTAGES OF BABCOCK AND WILCOX BOILER:
• The Advantages of Babcock and Wilcox Boiler is as follows.
• Generate Steam at high pressure and rate is high (140 bar and 40000kg/hr)
• For a given output, it occupies less space.
• Parts are accessible for cleaning, inspection, and repair
• Parts can be separated and transported easily.
• Due to the heating surface, Fuel is completely burnt.

18. DISADVANTAGES OF BABCOCK AND WILCOX BOILER:
• The disadvantages of Babcock and Wilcox Boiler is as follows.
• Pure feed water required.
• Cost is high.

19. THANK YOU!