presentation on industrial training at thermal power plan,gandhinagar

8/9/2019 PRESENTATION ON INDUSTRIAL TRAINING AT THERMAL POWER PLAN,GANDHINAGAR

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Prepared by:-

Submitted to:-Mechanical engineering department

L.D. College of Engineering, Ahmedabad

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Aim of the training:-

Generally the aim of the any industrial training is to

get the practical knowledge about particular field

and to take the industrial experience.

By the training one should know the real aspects

of the technology and to know how the

applications actually used in industry.

My aim for the training is to know about how

technology is utilized and how it is become more

useful to mankind.

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Company profile:-

Gandhinagar thermal power station is one of themost leading power station in Gujarat.It has totalgenerating capacity of 870 MW.

The main vision of the company is to To becomeone of the most efficient power generatingcompanies globally & being ethically & sociallyresponsive.

I choose this company for training because it isone of the most prestigious industry in the powersectors of Gujarat.

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INTRODUCTION:-

A thermal power station is a power plant in whichthe prime mover is steam driven. Water is heated, turnsinto steam and spins a steam turbine which either drivesan electrical generator .

After it passes through the turbine, the steamis condensed in a condenser and recycled to where it washeated ; this is known as a rankine cycle.

The rest of the energy must leave the plant in the form of

heat. This waste heat can go through a condenser and bedisposed of with cooling water or in cooling towers.

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SCHEMATIC DIAGRAM OF THERMAL POWER PLANT:-

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Working principle:-

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Chemicalenergy of coal

Kinetic energyof steam

Mechanicalenergy of turbine

Electricalenergy ofgenerator


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Power Plant Cycle:-

STEAM AND WATER CYCLE

COAL CYCLE

AIR AND FLUE GAS CYCLE

COOLING WATER CYCLE

ASH HANDLING CYCLE

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Feed water from the drum the water goes to the down comers andrises in boiler tubes.

This superheated steam which has temperature of 540 0c & pressureof 139 Kg/cm 2 is used to drive the H.P. turbine.

H.P. turbine has a temperature of 365 0C and a pressure of 32Kg/cm2 enters the re-heater through where its temperature isincreased to 5400C keeping the pressure constant.

The steam goes to the M.P. turbine here some amount of the steam

is extracted and sent to H.P. heaters. And the remaining amount ofsteam is sent to low pressure turbine. L.P. turbine some amount of steam is given to low pressure heater

& most of the part is given to condensers. Where steam condensesto water

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COAL CYCLE

The coal from the coal yard is crushed sent by conveyer belts tocoal bunkers and then pulveriser. Primary air picks this coal and takes it to the furnace where it is

combusted. This coal with help of the secondary air burns completely.

For effective burning the coal is crushed to increase its surfacearea By increasing surface area of coal we can get more efficientcombustion which is help us to increase efficiency.

For pulverising of coal bowl mills are used which is shownbelow.

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Bowl Mill

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AIR AND ASH CYCLE

Primary air fan sucks air from

the atmosphere which is heatedin the air preheater.

This air picks coal from the pulveriser and takes to the

furnace. Forced draught fan sucks air

from the atmosphere and this issupplied as secondary air intothe furnace for complete

combustion. I.D. Fan suck flue gas from ESP

and discharge into atmospherethrough chimeny.

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COOLING WATER CYCLE

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COOLING WATER SYSTEM Steam falls on the condenser from

the top and covers the tubes from

which water is flowing. The water enters the condenser at

temp of 30 0C and leaves at 400C theamount of water required is 18000TPH the condensate which is

produced gets collected in the hot

well. The heat is lost by the water to the

air in the cooling tower byconvection.

The water coming out of the all theplaces go back to the cooling towerfor cooling purpose. Some amountof the water is lost due toevaporation in the cooling tower.This make up water is taken fromD.M. Plant.

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CONDENSER Necessity:- Improves the efficiency. Decreasing the exhaust

pressure of the steam

Below atmosphere.

Provide a source of

good pure feedwater

reduces the cost of power generation.

increases enthalpy drop by

vacuum so efficiencyincreases.

pure feed water provides to

boiler so salt deposition inthe

boiler is prevented.

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ASH HANDLING SYSTEM

Bottom ashThe water impounded bottom ash hopper receives the

bottom ash from furnace where it is stored and

periodiocally discharged to the clinker grinder.

Fly ash System

The fly ash is collected by the ESP and its below each

hopper there is a material handling valve.

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ASH HANDLING SYSTEM

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Electrostatic Precipitator

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Ash Handling System

A 200 MW capacity power plant using Indians Coals produces

as a large as 60000 tons of ash per annum. Power plant of 200MW capacity requires 160 hectares area

during its life time it the ashes produced are dumped at the site

of the plant.

The ashes should be discharges and dumped at a sufficientdistance form the power plant because of the following

reasons.

(1) The ash is dusty, therefore irritating and annoying to handle.

(2) It is sufficiently hot when it comes out of the boiler furnace(3) It produces poisonous gases and corrosive acids when mixed

with water.

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THANK YOU

LIFE IS LIKE A FOOTBALL GAME AND WE

ARE LIKE FOOTBALL,NEVER MIND IF

PEOPLE WILL KICK YOU BECAUSE

REMEMBER THAT WITHOUT THEIR KICK

YOU CANT REACH YOUR GOAL

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presentation on industrial training at thermal power plan,gandhinagar

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