WEL-COME

THERMAL POWER STATION

PARALI

BYNIRAJ J. MESHRAMMAHENDRA S. MAGREVISHAL P. TAKLENIKHILESH G. VAIDYAKAPIL J. CHINCHOLE

THERMAL POWER STATION

LOCATION : Parali-Vaijyanath ,Dist .Beed . (MH)

INFORMATION :Parali Thermal Power Station started in the year 1971-72.

Total installation capicity of TPS= 1130 MW

INTRODUCTION

Stages Year UNIT no. Capacity

1 1971 U-1,2 30 MW each

2 1984 U-3,4,5 210 MW each

3 2005 U-6,7 250 MW each

Power Plant Stages

All power plants convert some form of easily and naturally available energy in to electrical energy. In thermal power plant, Water is the working fluid. The source of energy is Chemical Energy of fuel. Sequence of energy conversion is:

What is thermal power plant?

SELECTION OF SITE FOR THERMAL POWER STATION

1) Supply of fuel2) Availability of water3) Transportation facilities4) Cost and area of land5) Near to load centers6) Away from populated area

ENERGY CONVERSION PROCESS

COAL HANDLING PLANT (CHP)

WATER HANDLING PLANT (WHP)

TURBINE

TRANSFORMER AND GENERATOR

BOILER SYSTEM

THERMAL POWER PLANT CONSISTS OF FOLLOWING MAIN PARTS:-

WHY COAL as Fuel ?Coal can provide usable energy at a cost of between 12 to 15 % compared to oil and natural gas, and coal prices are relatively

stable. Coal is inherently higher-polluting and more carbon-intensive

than other energy alternatives. However, coal is so inexpensive that one can spend quite a bit

on pollution control, and still maintain coal’s competitive position.

TYPES OF WATER REQUIRED AT TPS

DEMINERALISED WATER – BOILER SOFTEN WATER – COOLING &

GENERAL SERVICE DRINKING WATER – DOMESTIC PURPOSE

ASH HANDLING – RAW WATER OR UNTREATED

WATER FIRE FIGHTING – UNTREATED WATER

COAL HANDLING – UNTREATED WATERDM % 3-4

CW/GS % 50-55AHP % 40-45DOMESTIC % 6-7

MachinesCHP : To Handle Fuel Coal

WTP : To Treat WaterBoiler : Generate High Press, High Temp Steam

Turbine: As aPlants/Main prime mover to Generator

Generator: To Generate ElectricityTransformer : For required Voltage

Switch yard : On ward Transmission of Power

COAL CYCLE

Coal Mine

Train

Tippler Conveyor Belt

Primary Crusher

Secondary Crusher Coal Bunker

Coal Feeder,MILL

FURNACE

Pressure parts of Boiler

WaterwallEconomiserSuperheater

ReheaterBoiler drum

STRUCTURE OF BOILERS Boiler structure is supported on 4 columns that is hung from top and

supported on vertical columns

All plates, rivets, bars and their testing is covered under regulation and construction is done under the supervision of inspecting officer

at all the stages

The boiler is a rectangular furnace about 50 feet(15 m) on a side and 130 feet (40 m) tall. Its walls are made of a web of high pressure

steel tubes about 2.3 inches (58 mm) in diameter.

Pulverized coal is air-blown into the furnace through burners located at the four corners, or along one wall, or two opposite walls, and it is

ignited to rapidly burn, forming a large fireball at the center

Types Of Boilers

DO

WN

CO

MER

S

WA T

ER W

A LL

F RO

NT

WA T

ER W

A LL

REA

R

PLA T

E N S

UP E

R HE A

T ER

REH

EATE

R F R

ON

T

REH

EATE

R R E

A R

FIN

A L S

UPE

RHE A

TER

WATER WALL BOTTOM RING HEADER

SCW

SH

FRO

NT

SCW

SH

RE A

R

DRUM

CRH IN

REAR ROOF

WATER INLET

SH STEAM OUTLET

EXTENDED WW

EXT SCW SH

FRONT ROOF

HRH OUT

LTSH

Economiser

May 2, 2023 PMI Revision 00 21

DRUM Lifting in Progress

BUCKSTAY SUPPORT FOR WATTER WALL TUBES

TURBINES

TURBINE CROSS SECTIONAL VIEW

HPT,IPT,LPT

HP Turbine• IP Turbine• LP Turbine

•  Regeneration Heating System consists of•  1. HP Heaters 2. LP Heaters

3. Deaerator 4. Condenser5. CEP and BFP 6. CW System

TURBINE SYSTEM

Steam flow in a turbineSteam in H.P turbine : P = 140 kg/cm2

T = 540 oCSteam in I.P : P= 26 kg/cm2

T = 540 oCSteam in L.P. : P = 7 kg/cm2

T = 270 oC

Working principleKinetic energy converted to rotational

energy which rotates the rotor of generator

Blades are so designed so as not to strike the blades but to glide on to

avoid wearingTotal motive force acting on the blades is thus the resultant of all

the centrifugal force plus the change of momentum

ROTORS

HIGH PRESSURE

INTERMEDIATE PRESSURE

LOW PRESSURE

BOILER

Condenser

LPTIPTMS

MS

CRH NRV

HRH

HPSV

HPSV

IPSV

IPSV GENERATOR

HPCV

HPCV

IPCV

IPCV

CRH NRV

TGSETHPT

Generator ComponentsStatorRotor

ExciterStator water cooling system

Rotor & Stator Hydrogen cooling SystemHydrogen Seal oil System

Bus DuctsGenerator synchronizing system

Working Of GeneratorThe principle Faraday’s law , is that an electromotive force is generated in an electrical conductor which encircles a varying magnetic flux.

3-Phase output

REQUIREMENTS

FOR ONE UNIT OF 210 MW • 600 ton steam supply/hr • 125 ton coal supply/hr• Three motors of 500 HP for supply of water• Daily consuption of coal for whole plant is

near about 13000 ton.

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