Anil thermal power plant

Presentation on

SURATGARH THERMAL POWER STATION

SUBMITTED TORAKESH DUDI(MECHANICAL DEPARTMENT)

Shri Jagdishprasad Jhabarmal Tibrewala

University

SUBMITTED BYANIL SHARMA

ROLL NO. ME-13402COURSE- B.TECH(ME) 5TH

SEM

contentsIntroduction

Turbine BoilerE.s.p.

Coal handling plant ash handling plant

generator Condenser

Milling plant Switchyard

INTRODUCTION

Suratgarh thermal power station is the first super thermal plant of rajasthan. Suratgarh Super Thermal Power Station is owned by Rajasthan Rajya Vidhyut Utpadan Nigam Ltd. and is situated near village riyanwali about 25 km Suratgarh town, an ideal location for setting up a thermal power station in the state having regards to the availability of land, water, transmission network proximity to broad gauge railway and being an important load centre for north west Rajasthan.

The techno-economic clearance for the prefect was issued by CEA in June 1991 the planning commission accorded investment sanction for the project in Nov. 91 for a total estimated cost of Rs. 1253.31 crores on prices prevailing in Sept. 1990.

The updated cost of the project is estimate at Rs. 2300 crores of including IDC.

It has generation capacity of 1500 MW and installed with six Units of 250 MW each. It is a coal base thermal station. Water and coal required in a large amount. Coal is received here from coal-fields of MP areas through railways and water is received from INDIRA GANDHI CANAL. The supply of coal is from MP, Jarkhand by rail. About 18000 tonne coal required per day for whole unit and each unit consumes 150 tonnes coal per day. About 2x3 km2 area covered by plant and approximately 1800 employees works in a plant including chief engineer to labour. The supply electricity to the northern Rajasthan, Ratangarh, Bikaner, Ganganagar.

FUTURE EXPENSION:-

It has been decided to set up 2 X 660 MW super critical units. For this purpose about 446 Hectare land has been identified adjacent to the existing 6 X 250 MW plant. This land is under process of acquisition. M/s TEC have been appointed consulting engineers for this project. The state Govt. has also accorded its in priciple approval for setting up in future, two additional units of 2 X 660 MW also based on super critical technology.

installed capacity:-Following is the unit wise capacity of the plant:

Stage Unit Number Installed Capacity(MW) Date of Comisioning Status

Stage I 1 250 May, 1998 Running

Stage I 2 250 March, 2000 Running

Stage II 3 250 October, 2001 Running

Stage II 4 250 March, 2002 Running

Stage III 5 250 June, 2003 Running

Stage IV 6 250 May,2010 Future

SANCTION OF SCHEMES (STAGE-I to IV)

Stage Unit No. Capacity(MW) Cost(Rs.Crore)I I & II 2x250 2300II III & IV 2X250 2057III V 1X250 753IV VI 1X250 1117

TOTAL 5127

STEAM TURBINE:-

Steam turbine is a rotating machine which CONVERTS HEAT ENERGY OF STEAM TO MECHANICAL ENERGY.

In India, steam turbines of different capacities, varying from 15 MW to 500 MW, are employed in the field of thermal power generation.

Basic principles:The Thermal Power Plants with steam turbine uses Rankine cycle. Rankine cycle is a vapour power cycle having two basic characteristics: 1. The working fluid is a condensable vapour which is in liquid phase

during part of the cycle end. 2. The cycle consists of a succession of steady flow processes, with

each processes carried out in a separate component specially designed for the purpose.

BOILER:- The boiler is the main part of any thermal power plant. It

converts the fuel energy into steam energy. The fuel may be furnace oil, diesel oil, natural gas or coal. The boilers may be fired from the multiple fuels. The boiler installed in S.T.P.S. are made by M/s BHEL . Each of the boilers are single drum, tangential fired water. Continuous steam output of 375 tons/hour at 138 kg/cm2 pressure and 540 degree cent. Temp. The thermal efficiency of each boiler at MCR is 86.8 %.

Turbine Casing Or Cylinders, Turbine Governing System

The main purpose of governor is to maintain this desired speed of turbine during fluctuations of load on the generator by varying steam input to the turbine. The governing system in addition to ensuring the falling load-speed characteristics of the turbine also ensures the following functions:1. The run up the turbine from rest to rated speed and synchronizing with the grid.2. Meeting the system load variations in a predetermined manner, when running in parallel with other machines.3. Protecting the machine by reducing the load or shutting off completely in abnormal and emergency situations.

H.P. TURBIN

E

I.P. TURBIN

E

L.P. TURBIN

E

Natural Circulation In this type, no external pumping device is used for the movement of the fluid. The

difference in densities in contents of fluids in down comers from the drum and risers in the furnaces is used to effect the movement of fluids. This type of circulation is employed in most of the utility boiler. The movement of the steam and water will increase with increased heat input to a maximum value or so called end point, after which further increase in heat absorption will result in a decrease in flow.

One of the characteristics of natural circulation is its tendency to provide the highest flow in the tubes with the greatest heat absorption.

Heat Transfer in Boiler·

Conduction·

Convection · Radiation

BOILER PRESSURE PARTS

Economizer

Super heater Reheater

Economizer

Economizer is a feed water heater.It uses the heat produced by the flue gases for this purpose. The feed water is passed through the economiser before supplying it to the boiler and economiser absorbs a part of heat from the flue gas to increase the temperature of the feed water.

Super heater

The steam produced in the boiler has got moisture content so it is dried and superheated (ie steam temperature is increased above boiling point of water)by the flue gases on the way to chimney. Super heating ensures two benefits at first the overall efficiency of the system is increased and secondly the corrosion to the turbine blades due to condensation in later stages is prevented. The superheated steam from superheater is fed to steam turbine by means of a main valve.

ReheaterReheater are provided to raise the temperature of the steam from which part of energy already been extracted by HP turbine. The reheater is composed of two stages or section, the front pendant vertical spaced platen section and the rea5r pendant vertical spaced platen section. The rear pendant vertical spaced section is located above the furnace arch between the water- cooled screen tubes and rear water wall hanger tubes. The front pendant vertical spaced plated section is located between the rear waterwall hanger tubes and the superheated platen section. All reheater drains and vents are opened before lighting off. The vents and drains to the atmosphere must be closed prior to raising a vacuum in the condenser. Drains connecting with the condenser may be lift open until the boiler is

Water Cooled Furnaces:- Bharat Heavy Electrical Limited has developed the

modern water-cooled furnace. Furnace is the primary part of boiler where the chemical energy available in the fuel is converted to thermal energy by combustion. Furnace is designed for efficient and complete combustion. Major factors that assist for efficient combustion are time of residence (fuel) inside the furnace, temperature inside the furnace and turbulence which causes rapid mixing between fuel and air.

CONDESER:- The functions of condenser are: 1. To provide lowest economic heat rejection temperature from

the steam. Thus saving on steam required per unit of electricity.

2. To convert exhaust steams to water for reuse this saving on feed water requirement.

3. Deaeration of make-up water introduced in the condenser. 4. To form a convenient point for introducing makes up water.

WRITTEN BY:-ANIL SHARMA

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