extra(latest)

7/26/2019 Extra(Latest)

1/11

Page | i

Report on Vocational Training

at

National Thermal Power Corporation, Dadri

Bachelor of Technology

Mechanical Engineering

By

UJJAWAL PRATAP SINGH

2012UME1368

Under the supervision ofMr. Ashish Kumar Purwar

Deputy Manager (AHP), NTPC Dadri

Mr. Surya Pratap Singh

Senior Engineer, NTPC Dadri

Submitted to

Dr. G.D. AgarwalDr. Gopal Agrawal

Dr. Rakesh Jain

DEPARTMENT OF MECHANICAL ENGINEERING MALAVIYA NATIONAL INSTITUTE OF TECHNOLOGY,

JAIPUR


2/11

Page | ii


3/11

Page | iii

ACKNOWLEDGEMENT

An engineer with only theoretical knowledge is not a complete engineer.

Practical knowledge is very important to develop and apply engineering

skills.

It gives me a great pleasure to have an opportunity to acknowledge and to

express gratitude to those who were associated with me during my training at

NTPC.

I am very great-full to Mr. S.L. Soni for providing me with an opportunity to

undergo training under his able guidance. Furthermore, special thanks to Mr.

Atul Kumar Purti for his help and support at NTPC Dadri. Last, but not the

least, I would also like to acknowledge the immense pleasure, brought about

by my friends as they pursued their training along with me. We shared some

unforgettable moments together. I express my sincere thanks and gratitude to

NTPC authorities for allowing me to undergo the training in this prestigious

organization. I will always remain indebted to them for their constant interest

and excellent guidance in my training work, moreover for providing me with

an opportunity to work and gain experience.

THANK YOU


4/11

Page | iv

ABSTRACTThis Project Report has been prepared in fulfilment of Industrial Training to be

carried out in third year of our four year B.TECH course. For preparing the Project

Report, we have visited NTPC Dadri during the suggested duration for the period of

45 days, to avail the necessary information. The blend of learning and knowledge

acquired during our practical studies at the company is presented in this Project

Report.

The rationale behind visiting the power plant and preparing the Project Report is to

study the mechanical overview, various cycles and processes (viz. Steam Generation,

coal handling, turbine functioning) of power generation in thermal power plant.

We have carried out this training under well experienced and highly qualified

engineers of various departments at NTPC Dadri. We have tried our best to cover allthe aspects of the power plant and their brief detailing in this project report.

The main aim to carry out this training is to familiarize ourselves with the real

industrial scenario, so that we can relate with our engineering studies.


5/11

Page | v

CONTENTS

Certificate.ii

Acknowledgement...iii

Abstract...iv

Contents...v

List of Figures..viii

List of Tables..x

Abbreviationsxi

CHAPTER 1 INTRODUCTION.1

1.1 About NTPC..1

1.2 Strategies of NTPC...2

1.3 Vision.3

1.4 Mission.3

1.5 Core Values3

1.6 Installed Capacity.31.7 Working Principle.6

1.8 About NTPC Dadri...7

1.8.1 Installed Capacity...7

1.8.2 Location.8

1.8.3 Coal Source....8

1.8.4 Water Source.8

CHAPTER 2 COAL CYCLE..9

2.1 Coal Supplied at NTPC Dadri..9

2.2 Different Components of Coal Cycle.9

2.2.1 Wagon Tippler.10

2.2.2 Track Hopper10

2.2.3 Paddle Feeder.11


6/11

Page | vi

2.2.4 Conveyer Belts..11

2.2.5 Safety Switches in Conveyers.11

2.2.6 Crusher House..12

2.2.7 Stacker cum Reclaimer...12

2.2.8 Coal Yard...13

2.2.9 Coal Bunker.13

2.2.10 Coal Feeder...14

2.2.11 Coal Mill...14

2.2.12 Furnace..15

CHAPTER 3 WATER CYCLE17

3.1 De-mineralized Water/Steam Cycle..17

3.2 Condensate Cycle...17

3.2.1 Hot Well...183.2.2 Condensate Extraction Pump...18

3.2.3 Feed Water Heater...18

3.2.4 Deaerator...19

3.2.5 Feed Storage Tank.19

3.3 Feed Water Cycle...20

3.3.1 Boiler Feed Pump..20

3.3.2 Feed Regulating Station...22

3.3.3 Economiser.223.3.4 Boiler Drum...23

3.3.5 Boiler..24

3.4 Steam Cycle.25

3.4.1 Superheater..25

3.4.2 Reheater....26

3.4.3 Steam Lines26

3.4.4 Condenser.26

3.5 Cooling Water Cycle...283.5.1 Raw Water Reservoir......28

3.5.2 De-Mineralizing Plant...28

3.5.3 Forebay...29

3.5.4 Cooling Water Pump House....29

3.5.5 Cooling Tower....29


7/11

Page | vii

CHAPTER 4 TURBINE AND GENERATOR..31

4.1 Turbine....31

4.1.1 High Pressure Turbine..31

4.1.2 Intermediate Pressure Turbine..32

4.1.3 Low Pressure Turbine...32

4.2 Electricity Cycle..33

4.3 Generator.....34

4.4 Transformer....35

4.5 Switchyard...36

4.5.1 Circuit Breaker..37

CHAPTER 5 AIR AND FLUE GAS CYCLE.38

5.1 Air Cycles..38

5.2 Fans..395.2.1 Primary Air Fan...39

5.2.2 Forced Draft Fan.39

5.2.3 Induced Draft Fan..40

5.3 Flue Gas Cycles..41

5.3.1 Air Preheater.41

5.3.2 Electrostatic Precipitator..42

5.3.3 Chimney...43

5.4 Ash Handling Plant....45

Conclusion47

References48


8/11

Page | viii

LIST OF FIGURES

S.No Figure No. Title Page No.1 Fig 1.1 PLF vs Year graph 2

2 Fig 1.2 Strategies of NTPC 2

3 Fig 1.3 Rankine Cycle (with reheat) 6

4 Fig 2.1 Coal Cycle 10

5 Fig 2.2 Wagon Tippler 11

6 Fig 2.3 Track Hoppers 11

7 Fig 2.4 Coal Sizes 12

8 Fig 2.5 Stacker cum Reclaimer 139 Fig 2.6 Coal Bunkers (in Yellow) 14

10 Fig 2.7 Coal Mills (Pulveriser) 15

11 Fig 2.8 Rollers of Coal Mill 15

12 Fig 3.1 Water Cycle 17

13 Fig 3.2 Low Pressure Heater 19

14 Fig 3.3 High Pressure Heater 19

15 Fig 3.4 Deaerator (upper cylinder) and Feed Storage

Tank (lower cylinder)

20

16 Fig 3.5 Boiler Feed Pump 22

17 Fig 3.6 Boiler Drum 23

18 Fig 3.7 Condenser 27

19 Fig 3.8 Natural Draft Cooling Towers 30

20 Fig 3.9 Cooling Tower from inside 30

21 Fig 4.1 High Pressure Turbine 31

22 Fig 4.2 Intermediate Pressure Turbine 3223 Fig 4.3 Low Pressure Turbine 32

24 Fig 4.4 Generator (Red) and Turbine (Green) 34

25 Fig 4.5 Station Transformer 36

26 Fig 4.6 Switch Yard 36

27 Fig 5.1 Flue Gas Cycle 38


9/11

Page | ix

28 Fig 5.2 Forced Draft Fan (bottom left) and Primary Air

Fan (bottom right)

40

29 Fig 5.3 Induced Draft Fan 41

30 Fig 5.4 Air Preheater 42

31 Fig 5.5 Electrostatic Precipitator 43

32 Fig 5.6 Chimney 4433 Fig 5.7 Hydrobins 46

34 Fig 5.8 Dry Ash Silos 46


10/11

Page | x

LIST OF TABLESS.No Table No. Title Page No.

1 Table 1.1 Installed Capacity of NTPC 32 Table 1.2 Coal Based Plants 4

3 Table 1.3 Gas Based Plants 4

4 Table 1.4 Projects Under Implementation 5

5 Table 1.5 Power Plants with Joint Ventures 5

6 Table 1.6 NTPC Dadri Coal Based 7

7 Table 1.7 NTPC Dadri Gas Based 8

8 Table 2.1 Crusher House 12

9 Table 2.2 Coal Mill 1510 Table 2.3 Furnace specifications 16

11 Table 3.1 Condensate Extraction Pump specifications 18

12 Table 3.2 Boiler Feed Booster Pump specifications 21

13 Table 3.3 Boiler Feed Pump specifications 21

14 Table 3.4 Economiser Specifications 22

15 Table 3.5 Boiler Drum specifications 23

16 Table 3.6 Boiler Specifications 24

17 Table 3.7 Superheater specifications 25

18 Table 3.8 Reheater Specifications 26

19 Table 3.9 Condenser Specifications 27

20 Table 3.10 Cooling Tower Specifications 30

21 Table 4.1 Turbine Specifications 33

22 Table 4.2 Stage I (210MW) Generator specifications 35

23 Table 5.1 PA Fan specifications 39

24 Table 5.2 FD Fan specifications 3925 Table 5.3 ID Fan specifications 40

26 Table 5.4 Electrostatic Precipitator specifications 42

27 Table 5.5 Chimney Specifications 44


11/11

Page | xi

ABBREVIATIONSAHP ASH HANDLING PLANT

APH AIR PRE HEATER

BFP BOILER FEED PUMP

CEP CONDENSATE EXTRACTION PUMP

CHP COAL HANDLING PLANT

CRH COLD REHEAT LINE

DM DEMINERLISATION PLANT

FD FAN FORCED DRAUGHT FAN

HP TURBINE HIGH PRESSURE TURBINE

HRH HOT REHEAT LINE

ID FAN INDUCED DRAUHT FAN

IP TURBINE INTERMEDIATE PRESSURE TURBINE

LP TURBINE LOW PRESSURE TURBINE

NRV NON RETURN VALVE

PA FAN PRIMARY AIR FAN

RH REHEATER

SH SUPERHEATERSAC STRONG ACID CATION

SBA STRONG BASE ANION

TPH TONN PER HOUR

T&G TURBINE AND GENRATOR

WAC WEAK ACID CATION

WBA WEAK BASE ANION

extra(latest)

Documents