PRESENTATION

ON THERMAL

POWER PLANT

By : B.MOUNIKA

13J41A0311

B.TECH. 4th Year

Mechanical Engg.

MREC, Secunderabad.

PROCESS OF THE PLANT

Receiving Coal, Generating Steam, Rotation of Steam

Turbine,Generation of Electricity.

RAW MATERIAL – Fuel – Coal

Coal linkage from Mahanadi Coal Fields,

Talcher, Orissa.

Consumption: Average 20000 T / day

7 million tonnes / annum

MEDIUM – DM Water, Cooling Water, Lubricants

PRODUCT – Electricity at 15.75 KV, stepped up to 220 KV

Daily Generation – 30.24 MU at Full Load

10000 MU in a year.

BY PRODUCT – Fly Ash, Pond Ash

% Utilisation – 40 %

INTRODUCTION

The major equipment in Thermal Power Stations are:-Boiler,Turbine,Generator, Power transmission and Equipment

In Boiler, fuel is fired and steam is generated and superheated under high Pressure. This superheated steam under high pressure is supplied to High Pressure Cylinder of steam turbine and expanded. The Low Pressure exhaust steam from H.P cylinder is taken again to the boiler and reheated.

The power plant cycle is divided into a number of Sub. cycles

each of which has its own instrumentation system and

simultaneously interacting with other cycles.

The broadly classified cycles are :-

Water cycle that includes the condensation, make up,

demineralization heating and deaeration, feed pump and

economizer.

Combustion cycle consisting of economizer, boiler super heaters

and reheater.

Steam cycle with boiler, superheaters, reheaters and turbines

MAIN PARTS OF THERMAL POWER

STATION

• Coal handling plant

• Pulverizing plant

• Boiler

• Super heater

• Steam Turbine

• Economizer

• Generator

• Water Treatment Plant

• Ash handling plant

Coal Handling Plant

COAL WAGONS[55-60IN EACH RAKE]

WAGON UNLOADING SYSTEM

Unload the coal from

wagon to hopper

with the help of

wagon Tripler.

Hopper allows to

pass coal pieces ≤

200mm

From hopper coal fall

on vibrator which is

supported by roller.

CONVEYING SYSTEM

Belt are used to convey coal from coal handling plant to furnace.

Specification:- Belt width : 1400mm

Speed : 2.2m/sec

Total install power : 360kw

Capacity : 1350/750 ton/hr

No. of conveyor: 38

PULVERIZED

FUEL FIRING

BOILER

It is a closed vessel in which water under pressure is converted into steam.

Hot water or steam used to transfer heat to a process.

A boiler is always designed to absorb maximum amount of heat released in process of combustion.

Furnace:- It is primary part of boiler where the fuel is burnt to liberate the heat energy.

Chemica

l Energy

of fuel

Thermal

Energy by

combustion

FIGURE BOILER

STEAM TURBINE

It is a machine in which a shaft is rotated steadily by reaction of steam, air upon blades of a wheel.

When Steam is used then it is called steam turbine.

It works on Modified Rankine cycle.Kinetic

Energy

Mechanical

Energy

•An electrical generator is a machine which converts mechanical energy into electrical energy through electro mechanical energy conversion .

•The generator is driven by directly coupled steam turbine at a speed of 3000 r.p.m.

Electrical

Energy

Mechanical

Energy

WATER TREATMENT PLANT

Pressure filter removes undisclosed impurities from

raw water.

Carbon filter removes excess chlorine from clarified

water.

D.M. plant removes dissolved impurities from clarified

water.

Conductivity ,pH & silica content of this water must be

checked time to time.

D.M. water must be in the

ratio of 1:8

ASH HANDLING PLANT

In thermal plants 25% is furnace bottom ash and 75% is pulverized fuel ash.

Electrostatic Precipitator is used in ash handling plant to remove fly ash.

THANK YOU…!!!

&

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