slide on ntpc coal handling plant

1. ABESIT
PRESENTATION BY : RADHEY LAL
Roll No. : 1429040081
Section : 4th Year, ME-B2
Seminar
presentation
PRESENTED TO : Mr. Amit gupta

2. NTPC Dadri
CHP (Coal Handling Plant) Department
Presentation on :

3. Diagram of a typical coal-fired thermal power station

4. About NTPC
 NTPC, the largest power Company in India, was setup in 1975 to
accelerate power development in the country.
 NTPC has installed capacity of 41,684 MW.
 NTPC ranked 300th in the ‘2013, Forbes Global 2000’ ranking of the
World’s biggest companies.
 NTPC plans to become a 128,000 MW company by 2032.
 It has 16 coal based power stations (23,395 MW)
 7 gas based power stations (3,955 MW)
 4 power stations in Joint Ventures (1,794 MW).
 NTPC has been awarded NO-1,best workplace in India among large
organization and the best PSU for the year 2010.

5. History
 NTPC Dadri plant and township are property of ntpc ltd and
were built around 1988-1990.
 It was commissioned in 1991.
NTPC Dadri is a branch of National Thermal Power Corporation,
which is a public sector now. It is about 20 km from Ghaziabad
via Badalpur, Mahawar, Bamabawar, and Akilpur Jagir.
Continued..

6. Capacity
 NTPC Dadri is a unique power plant of NTPC group which has both
coal based thermal plant and gas based thermal plant of 1820 MW
and 817 MW respectively and 5 MW solar plant .
 Coal based :
Stage Unit Number
Installed
Capacity (MW)
Date of
Commissioning
1st
1 210 1991 October
2 210 1992 December
3 210 1993 March
4 210 1994 March
2nd
5 490 2010 January
6 490 2010 July
Total Six 1820

7.  Gas based :
NTPC dadri also produces electricity by gas. The details of gas power plant
are given below in the table.
Stage Unit Number
Installed
Capacity
(MW)
Date of
Commissioning
Gas Turbine
/ Steam
Turbine
1st
1 130.19 1992 March GT
2 130.19 1992 May GT
3 130.19 1992 June GT
4 130.19 1992 November GT
5 154.51 1993 February ST
6 154.51 1993 March ST
Total six 829.78

8. Total capacity of the plant is 2649 MW.

9. NTPC distributes to:
 Its mainly distributes most of its electricity to Delhi.
 And it also distributes some part of it electricity to Uttar Pradesh,
Uttarakhand and Haryana .
NTPC Dadri gets:
 Coal from Piparwar Mines ,Jharkhand .
 Gas from GAIL Hajira-Bijapur-Jagdispur (HBL) pipeline.
 Water from Upper Ganges Canal.

10. CHP (Coal Handling Plant)
 The role of CHP is to meet the demand of coal.
 It is the responsibility of CHP to take care of coal from Piparwar Mines ,
Jharkhand which is approx. 1250 Km away from the plant to the combustion
chamber/boiler.
 The CHP also takes care of the quality of coal . It ensures that the best quality
of coal should go for combustion.
 It also takes care of storing of coal in bunkers & reclaiming it at the time of
requirement.
 It also take cares that the calorific valve of coal should not lost during storage.
 It fulfil the need of coal according to the units operating or load.
 The function of coal handling plant is automatic feeding of coal to the boiler
furnace.
 The CHP department also takes care of Locomotives, track, and their
maintenance.

11. Coal Used :
 The daily coal usage in NTPC Dadri is 26000 tonnes at full
load.
 The coal used in stage 1 unit is 14000 tonnes.
 The coal used in stage 2 unit is 12000 tonnes.
 The coal grade used in NTPC is of grade 12.

12. COAL TRANSPORTATION
 Source of coal : Piparwar Mines ,Jharkhand)
 Means of transportation : Railway
Distance : 1250Km
Type of coal : Grade 12
C.V(calorific value) : 4600 kcal/kg.
Coal requirement : 26,000 MT/Day
Type of wagon : 1. Track Hopper
2. Wagon Tippler

13. Transportation of Coal
 The coal is transported by Railway. From the mines to the Dadri
Railway Station the coal is transported by Indian Railway.
 But from Dadri station to the plant the coal is transported by NTPC
own Locomotives .
 For this purpose NTPC has 6 Locomotives.
Unloading
There are two types of wagon for unloading of coal which are given below:
 Wagon Tippler
 Track Hoper

14. The coal is unloaded from a box type wagon by tilting it by 150deg angle.
In this type wagons have opening at sides from which coal is unloaded.
This is a slow process and usually takes 6-7 hours for unloading of
train (16-17 wagons).

15. In this the wagons are bottom open type.
The compressed air is used for unloading.
This is a fast process & whole train is unloaded in 1 hour.
The opening shown in the figure are 25cm wide.
The coal after passin through these opening goes
to the Hopper from where it goes to the conveyer belt.

16. Hopper
After coal is unloaded it goes in the hoppers from where
it goes to the conveyor belt which leading to the
crusher.
From hopper it is goes to conveyor by pedal feeder.
In this video you watch how hopper looks like $ how
conveyor is moving .

17. Crusher House
 Crusher house is used to crush the coal to a size of 20mm.
 It crushes the coal by hammering action which converts the 250mm coal into
20mm coal.
 Before coal goes to the crusher it passes through a vibrating mechanism
named Gizzly Feeder which separates the 20mm or less than 20mm coal and
sends it directly on the conveyor on which the coal comes after crushing in 20
mm.
 After crusher house coal goes to the mills in which the coal is further reduced
into the size of 70 microns which is like baby powder.
 Then the powdered coal goes in the furnace.

18. Outer part of crusher Inside view of crusher

19. Crusher
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Hammer
30 mm Rotor
Coal

20. General Layout Of CHP
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Wagon Tippler Crusher House
Bunkers
Tripper Trolley
Conv. Belts Vibrating
Screens
Crushers
Feeder Surge
Hopper
Hopper

21. Operational Cycle
Bunkering Cycle
Stacking Cycle
Reclaiming Cycle
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22. Bunkering Cycle
4/11/2018 22Bunkers
From W/T
Bunkering
Belts
Surge Hopper
Vibrating Feeder
Crusher House
Crusher

23. Stacking Cycle
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Bunkers
Stacking Belts
Crushed
Yard
From W/T
Crusher House
Bunkering
Belts
By-Passed Coal
Coal Is not required if
bunker is full or Due any
maintenance

24. Reclaiming Cycle
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Bunkers
Reclaiming Belts
Crushed
Yard
Non-
Crushed
Yard
From W/T
Crusher House
Bunkering
Belts
If Outer Supply of coal
Is Not Present
Stacked Coal

25. Conveyor Belt
 The speed of conveyor belt is 2.4 m/s
before going to the crusher and 2.7 m/s
after coming from crusher.
 The conveyor belt system of Ntpc is
23Km long.
 Protection System
 Interlocking
 Pull cord switch
 Belt sway switch
 Magnetic Separator
 Metal detector
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26. Protection System
 Pull cord switch : Pull cord switch is
used as a safety switch to stop
the conveyor emergency.
 Belt sway switch : The switch allows smooth
running of conveyor and protects it from over
swaying due to uneven loading of material.

27. Protection System
 Suspended Magnet is a powerful magnet which is
suspended above the conveyor belt used to remove
ferrous elements from coal.
 Magnetic Separator is used to remove metal particle
from coal conveyed through conveyor belt .
 Non Ferrous Metal Detector is used to detect non ferrous
metal from coal
moving on conveyor belt.
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28. Thank You