presentation on singrauli super thermal power project

8/2/2019 Presentation on Singrauli Super Thermal Power Project

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PRESENTATION ON SINGRAULI

SUPER THERMAL POWER PROJECT

BY,

ABHISHEK MANARIYA

B.Tech (EEE), 7th

sem


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N.T.P.C SINGRAULI

TOTAL 2000 MW CAPACITY

STAGE-I : units are 5X200 MW

STAGE-II : units are 2 X 500 MW

Land : PLANT - 550 ACRES

TOWNSHIP - 930 ACRES

Water sources : Rihand reservoir

Coal Sources : Jayant mines

Beneficiary States : UP, J&K, HimachalPradesh, Chandigarh,Haryana, Punjab & Delhi.


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FUEL

1. COAL2. OIL

AIR

WATER

HFO

LDO


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COAL HANDLING PLANT

The coal is received at track hopper of CHP through themerry go round system used For coal transportation. Coalflows through paddle feeders, belt conveyors, vibrofeeder where it undergoes size reduction (-20 mm size).

The crushed coal is transported through different

conveyors and trippers to the respective unit bunkers. The coal crushed in excess of the requirement is stacked

at stockyard of CHP through stacker / reclaimers. Whenever required by system, the coal is reclaimed

and fed to unit bunkers through stacker / reclaimers.

In case bigger size coal is found , that crusher is offloadedand inspected for rectification .


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TRACK HOPPER

CRUSHER HOUSE

COAL MILL


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FUEL FIRING SYSTEM

The crushed coal stored in the Raw coalBunker is fed to the Pulverizers throughGravimatric coal feeders. The Pulverizer grindsthe coal to very fine size, which is carried away

by the Hot Primary Air to the furnace throughfour Coal pipes of each pulverizer. The pulverized coal fired in the furnace, burns

completely in presence of the Hot secondaryair. This combustion results in the radiant heat

which is absorbed by the Boiler water walls,where Boiler water is boiled & is converted into steam and Radiant super heaters, wheresteam is super heated.


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PRINCIPLE OF THE STEAM POWER

PLANT

The working principle of a steam plant is basedupon the Rankine cycle. Generally steam is takenas the working medium due to its ability to bestable and that its readily stable. The flow of

steam in the plant can be very easily beunderstood by the flow diagram of the plant. Agraph plotted between the temperature and theentropy would indicate the technical details of

the working by the rankine cycle. The entropy ofa system can be understood as an index ofdegradation of energy.


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PLANT FLOW DIAGRAM


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MODIFIED RANKINE CYCLE


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IMPORTANT DATA

LOAD ----- 500 MW

COAL FLOW ----- 300 T/HR

AIR FLOW ------ 1800 T/HR

STEAM FLOW ---- 1600 T/HR


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STEAM CYCLE

The heat produced by the combustion of the coal is used togenerate the steam. The steam is further heated in thesuper heaters and forms Main Steam. This main steam isdelivered to the Turbine through main steam lines in acontrolled manner by means of Main Steam Stop Valvesand Control valves that are regulated by the TG Governing

System. In turbine the steam expands and converts Heatenergy in to Mechanical energy.

In between the HP turbine and IP turbine the steam isagain carried to the Boiler, where it is reheated anddelivered to the IP turbine and low perssure turbine.

After the turbine, the steam goes to the condenser whereit is condensed under deep vacuum . The condensate iscollected in the Hotwell.


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DRUM LTSHDIVISIONAL

SHPLATEN

SH

HPT

REHEATERIPTLPTCONDENSER

HOTWELL


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Condensate, Feed Water & Boiler

Water system

The condensate from the Hotwell is extracted by CEPand is pumped, via LP Heaters where it gets heatedup, to the Deaerator.

The condensate now becomes Feed water and gets

stored in the Feed Storage Tank just below Deaerator. The BFP takes Suction from this Feed Storage tank

and pumps this feed water through HP heaters, feedcontrol station and economizer to the Boiler Drum,where it becomes Boiler Water.

This boiler water goes to the boiler water wallswhere it absorbs heat, transforms in to steam andreturn back to the Boiler drum. In stage I boiler thiscirculation of boiler water is natural, whereas in stageII boiler it is assisted by CC pumps.


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Hotwell CEP

D/A

BFPECODRUM

LPH

HPH

WATER FLOW DIAGRAM


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ESP PROCESS STEPS

Collectingelectrode,grounded

Rapping mechanismDischarge electrode withNegative high tension (20-60kV)

1

2

3

4 5

Dust layer1.Electron emission

2.Dust particle charging

3.Migration

4.dust collection

5.Rapping


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ESP Working Principle

Working principle: the principle upon which an electrostaticprecipitator works is that dust laden gases are passed into achamber where the individual particles of dust are given anelectric charge by absorption of free ions from a highvoltage DC ionising field.

Electric forces cause a stream of ions to pass from thedischarge electrodes (emitting) to the collecting electrodesand the particles of ash in the gas are deflected out of thegas stream into the collecting surfaces where they areretained by electrical attraction.

They are removed by an intermittent blow usually referredto as RAPPING. This causes the ash to drop into hopperssituated below the electrodes

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