AZAD INSTITUTE OF ENGINEERING AND

TECHNOLOGY LUCKNOW

SEMINAR ON SUMMER TRAININGNTPC .LTD SHAKTINAGAR

RAM NARAYAN SHAHB.TECH (Mech.Engg.)FINAL YEARRoll No.1005340058

N.T.P.C LTD, BADARPUR

  “A world class integrated power major, powering India's growth with increasing

global presence.” NTPC was set up in 1975 with 100% ownership by the Government of india.

NTPC has installed capacity of 29,394 MW.

It has 15 coal based power station (23,395MW) &7 gas based power station(3,955MW).

4 power stations in joint venture (1794MW)

In 1997, Government of India granted NTPC status of “Navratna” company.

NTPC has embarked on plans to become a 75,000 MW company by 2017.

ABOUT NTPC.LTD

Installed capacity 2000 MW. Location Sonebhadra Uttar Pradesh. Coal Source:-Jayant Mine. Water Source :- Rihand Reservoir. Beneficiary States:- UP, Uttranchal,

Rajasthan, Punjab, Haryana, Delhi, Himanchal Pradesh, Chandigarh.

Unit Size:- STAGE 1: 5*200 MW & STAGE2: 2*500MW.

ABOUT NTPC SHAKTINAGAR

COAL TO ELECTRICITYThe basic steps in the generation of coal to electricity are shown below:

BASIC POWER PLANT CYCLE

A simplified diagram of a thermal power plant

Steam generating equipment Condenser Prime mover Electrical equipments

THE MOST IMPORTANT CONSTITUENTS OF A THERMAL POWER STATION ARE:

Boiler

Superheater

Economiser

Air preheater

Steam generating equipments includes:

A boiler is a closed vessel in which water is converted into steam by utilising the heat of coal combustion.

Steam boiler are broadly classified into following two type: (a)-water tube boiler &(b)- fire tube boiler.

In water tube boiler water flows through the tube and the hot combustion gases flows over these tubes. Water tube boilers are used for high pressure boiler.

BOILER

WATER TUBE BOILER

FIRE TUBE BOILER

A device which removes last traces of moisture. It helps in reduction in requirement of steam quantity.

steam being dry reduces the mechanical resistance of turbine.

 No corrosion at the turbine blades.

SUPERHEATER

They are such devices which recover the heat from the flue gases on their way to chimney and raise the temperature of feed water.

Air Pre-heaters recover the heat from the flue gases leaving the economiser and heat the incoming air required for combustion.

ECONOMISER AND AIR PREHEATER

FIGURE OF AIR PREHEATER

ECONOMISER

Which condenses the steam at the exhaust of turbine.

It creates a very low pressure at the exhaust of turbine, this helps in converting heat energy of steam into mechanical energy in the prime mover.

The condensed steam can be used as feed water to the boiler.

CONDENSER

FIGURE OF TWO STAGE COND.

A steam turbine is a mechanical device that extracts thermal energy from pressurized steam, and converts it into mechanical energy.

About 86% of all electric generation in the world is by use of steam turbines.

It has almost completely replaced the reciprocating piston steam engine.

PRIME MOVER(I.E. TURBINE)

Turbo generator :

An turbo generator is coupled to a steam turbine and converts mechanical energy of the turbine into electrical energy.

It may be hydrogen or air cooled. Rating of turbo generator is normally 200MW & 500MW.

Transformers: (a) main step-transformers, which steps-up generated voltagetransmission of power.

(b) station transformers, general purpose. (c) auxiliary transformers, which supply to individual unit-auxiliaries.

Switchgear:

which locates fault on the system and isolate faulty part fromhealthy section.It contains circuit breakers, relays, switches and other controldevices.

 

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ELECTRIC EQUIPMENTS

Source of coal=Jayant mines(madhya pradesh).

Location of source=Near singrauli(madhya pradesh).

Distance of source from plant =5km. Type of coal-D grade. Coal requirement: 25,000 MT/day

COAL HANDLING PLANT DETAILS

Generally thermal power stations use coal mills or called coal firing system.

Coal is reduced to fineness (-20mm).

This fine powdered coal is called pulverized coal and is carried forward to the burner by air through pipes.

MILLS

A natural result from the burning of fossil fuels, particularly coal, is the emission of fly ash.

Ash is mineral matter present in the fuel. For a pulverized coal unit, 60-80% of ash leaves with the flue gas.

Electrostatic precipitator has series of collecting & emitting electrodes in a chamber.

At the inlet of the chamber there are distributer screen.

Hooper and flushing system form a base of chamber.

Efficiency of ESP is approx. 99.8%

ASH HANDLING TECHNIQUE

THANKS

ANY QUESTION

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