ppic-presentation1

7/24/2019 ppic-presentation1

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www.powerplantinstrumentation.yolasite.com


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In India 65% of total power is generated by the

Thermal Power Stations .

Main parts of the plant are

1. CP 2.!oiler 3. Coal ash 4."P 5. #$P 6. SP 7.Chimney 8. Turbine 9. Condenser 10.

Transformers 11. Cooling towers 12. &enerator13.Sub Station 14.!'P 15. "C( 16. ")* 17.TSP

18.+P 19.P 20.#eareator.


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BASIC OPERATION :

A thermal power plant basically works on Rankine

cycle.

COAL CONVEYOR :

This is a belt type of arrangement. With this coal is

transported from coal storage place in power plant to the

place near by boiler.


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STOKER :

The coal which is brought near by boiler has to put in

boiler furnance for combustion. This stoker is a

mechanical device for feeding coal to a furnace.

PULVERIZER:

The coal is put in the boiler after pulverization.For this

pulverizer is used. A pulverizer is a device for grinding

coal for combustion in a furnace in a power plant .An

impact mill is used for this purpose.


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BOILER:

pulverized coal is put in boiler furnace in which water is

heated and circulated until the water is turned in to

steam at the required pressure. oal is burned inside the

combustion chamber of boiler. These gases which are at

high temperature vaporize the water inside the boiler tosteam


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SUPERHEATER :!uperheater is a component of a steam"

generating unit in which steam# after it has left

the boiler drum# is heated above its saturation

temperature. The amount of superheat added to

the steam is influenced by the location#

arrangement# and amount of superheater surface

installed# as well as the rating of the boiler!uperheaters are classified as convection #

radiant or combination of these


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REHEATER,*eheater is also steam boiler component inwhich heat is added to this intermediate-pressure steam which has gi/en up some ofits energy in e0pansion through the high-pressure turbine. The steam after reheatingis used to rotate the second steam turbine

where the heat is con/erted to mechanicalenergy.


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CO!E"ER #

Steam after rotating steam turbine comes tocondenser. Condenser refers here to theshell and tube heat e0changer installed atthe outlet of e/ery steam turbine in Thermal

power stations. These condensers are heate0changers which con/ert steam from itsgaseous to its li1uid state. In so doing thelatent heat of steam is gi/en out inside the

condenser .


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COO$%& TO'ER" #

The condensate water after condensation is initially athigh temperature. This hot water is passed to coolingtowers. It is a tower in which atmospheric air circulatesin direct or indirect contact with warmer water and thewater is thereby cooled. (ater acting as the heat-transfer 2uid gi/es up heat to atmospheric air and

thus cooled is recirculated through the system.


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ECOOM%"ER #

'lue gases coming out of the boilercarry lot of heat. 'unction ofeconomiser is to reco/er some of the

heat from the heat carried away in the2ue gases up the chimney and utili3efor heating the feed water to the

boiler. It is placed in the passage of2ue gases in between the e0it from theboiler and the entry to the chimney.


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A%R )REHEATER #The remaining heat of 2ue gases is

utilised by air preheater. It is a de/iceused in steam boilers to transfer heatfrom the 2ue gases to the combustionair before the air enters the furnace


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ELECTROSTATIC PRECIPITATOR :

$t is a device which removes dust or other finely

divided particles from flue gases by charging theparticles inductively with an electric field# then

attracting them to highly charged collector

plates.


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SMOKE STACK (%$&'()) :

A chimney is a system for venting hot flue

gases or smoke from a boiler# stove# furnace orfireplace to the outside atmosphere. They are

typically almost vertical to ensure that the hot

gases flow smoothly# drawing air into

the combustion through the chimney effect


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&EERATOR #

"n alternator is an electromechanicalde/ice that con/erts mechanical energyto alternating current electrical energy. $ost

alternators use a rotating magnetic 4eld."ny "C generator can be called analternator but usually the word refers tosmall rotating machines dri/en by

automoti/e and other internal combustionengines.


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TRANSORMERS :

$t is a device that transfers electric energy fromone alternating"current circuit to one or more

other circuits# either increasing *stepping up+ or

reducing *stepping down+ the voltage


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)$AT

$A*O+T


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