PRESENTED BY- VIKAS

EI- 4TH YEAR

1205232912

NTPC DADRI AT GLANCE

UNIQUE FEATURES OF NTPC DADRI

INTRODUCTION TO THERMAL POWER PLANT

BLOCK DIAGRAM OF THERMAL POWER GENERATION

INTRODUCTION TO COAL HANDLING PLANT

BOILER SECTION

TURBINE SECTION

GENERATION SECTION

ASH HANDLING PLANT

TOTAL CAPACITY OF DADRI POWER PLANT :-

(A) THERMAL

I) 04X210 MW = 840 MW

II) 02X490 MW = 980 MW

TOTAL = 1820 MW

(B) GAS = 817 MW

(C) SOLAR = 05 MW

GRAND TOTAL= 2642 MW

Largest gas station in the country (Operated by central

govt in western region)

Largest dry ash handling plant in Asia (Dry ash

disposal technique)

Only power station in the country housing both coal

based and gas based units

Largest switchyard in country with power handling

capacity of 5300 MW

Some Prefer to use the term as Energy Centre.

A Thermal Power station consist of all equipmentand subsystem required to produce electricity.

It uses a steam generating boiler fired with fossilfuels to drive an electric generator.

It convert a form of energy like nuclear energy,gravitational potential energy or heat energy intoelectric energy.

BLOCK DIAGRAM OF POWER GENERATION

Boiler

Water

Steam Turbine Generator

Ash

coal

Following are the sections of a coal based thermal power plant:

Coal handling plant

Boiler section

Turbine section

Generator section

Transmission and distribution

Ash handling plant

Section of the power plant which takes care of the

required coal in the plant.

Coal handling plant is automatic feeding of coal to

the boiler furnace.

It consists of the following components:

Coal wagons

Coal conveyer

Coal bunkers

Coal pulveriser

It is responsible to convert the water into steam.

It is consist of following parts:

Platen SH.

375C-425C

Final SH.

500-540C

Economizer

240-310C

LTSH

330-375C

Water Wall

310C

210 MW Boiler: Water and Steam Circuit

Atmospheric air is heated in the air pre-heaters

Water passes through Deaerator for removal of

dissolved gases.

then through feed water heater, then from the boiler

feed pump passes through economizer and reaches the

boiler drum.

Due to heat and density difference the water rises up in

the water wall tubes.

Water is partly converted into steam as it rises up in the

furnace.

This steam and water mixture is again taken to the

boiler drum, where the steam is separated from water.

Flue gases from the furnace are extracted by induced

draft fan.

BOTTOM RNG HDR & Z-PANEL 1ST PASS W.W

1ST PASS W.W O/L HDRS ROOF I/L HEADER

2ND PASS UPPER C-HDR 2nd PASS LOWER C-HDRS

LTSH I/L HEADER LTSH O/L HEADER

D.P.I/L HEADER D.P.O/L HEADER

S.H. HEADER R.H.HEADER

2ND PASS ROOF O/L HDR(REAR ECONOMISER

M.S

H.R.

H

C.R.H

FROM F.R.S

It is use to convert the steam to mechanical power.

It consist of the following components:

Steam Turbine-used to convert steam to mechanical power and drives theGenerator.

Control Valves- used to control operating conditions such as temperature,pressure, flow etc.

Re-heaters-used to pickup more energy to go drive intermediate or lowerpressure turbines.

Condenser-used condensing the steam exhausted from turbine so that thiswater can be reused.

This is used to convert the mechanical power to

electrical power.

It consists of following components:

Generator-used to convert mechanical energy to

electrical energy.

Demineralised water- it is the pure form of water

which don’t contain any sort of mineral.

It takes care of the ash generated due to the

combustion of coal.

The percentage of ash in the coal varies from

about5% to 40%.

Power plants generally use average or poor

quality coal .

A modern 2000MW plant produces 5000 tons of

ash daily.

As a result of this the ash produced by a plant is

pretty large.