Harduaganj Thermal Power Plant
Under the Supervision Of
Mr. Pradeep Kumar
B. Tech., 4th Year
WHAT IS THERMAL POWER STATION
A thermal power station is a power plant in which the main
requirement for making electricity is steam.
Thermal power station are the stations in which energy of coal is
converted into electrical energy.
Coal is burnt in a boiler which converts the water into steam. The
expansion of steam in turbine produces mechanical power which
drives the alternator.
In India 65% of total power is generated by the Thermal Power Stations.
Yamunanagar Thermal Power Project i.e D.C.R.T..P.P(Deen Bandhu ChotuRam
Thermal Power Plant) is a project of hariyana.
Harduaganj Thermal Power Station is located at Kasimpur power house
colony which is 1KM distance from Harduaganj Railway Station at Harduaganj in
Aligarh district in the Indian state of Uttar pradesh
Harduaganj Thermal Power Station has a installed capacity of 415MW.
1 Unit of 60 MW capacity (it is unit number fifth).
1 Unit of 250 MW capacity (it is unit number eighth).
1 Unit of 250 MW capacity (it is unit number ninth)..
Its last unit (ninth unit) of 250 MW became operational in June 2012.
DIFFERENT COMPONENTS OF A COAL
BASED THERMAL POWER PLANT
Coal Transportation and Handling
D M Plant
Ash Handling Plant
COAL TRANSPORTATION AND HANDLING
Coal undergoes various processes like separation, crushing, etc and is
then finally moved to the furnace in the form of pulverised coal.
Marshalling Yard: it consist of railway tracks provided to receive the
loaded trains, to unload them and to put them back in formation without
Wagon Tippler: this consist of tippler structure that supports the
wagon during tippling. It also consists of balance weight which reduces
the load on the motor by balancing a portion of weight of the structure.
Crusher: these are used to break the received coal from 250 mm
size to about 20 mm size. The crusher consists of fast moving rotor
with a number of hammers mounted on rods.
Dryers: they are used in order to remove the excess moisture from
coal mainly wetted during transport.
Magnetic separators: coal which contain iron particles may result
in wear and tear so these are unwanted and so are removed with the help
of magnetic separators.
Pulverizer: A pulverizer is a device for grinding coal for combustion
in a furnace in a power plant.
Types of PulverizerBall and Tube Mill pulverizer consists of a horizontal rotating cylinder,
up to three diameters in length, containing a charge of tumbling or
cascading steel balls.
Ring and Ball consists of two rings separated by a series of large balls.
The lower ring rotates, while the upper ring presses down on the balls
via a set of spring and adjuster assemblies.
DEMINERAL ( DM ) PLANT
the water required for formation of steam should be perfectly devoid
of minerals because if it would be present with the steam then it will
strike the blades of turbine and due to being in high pressure it
produces scars or holes on the turbine blades.
Boiler is an enclosed vessel in which water is heated and circulated until
the water is turned into steam at the required pressure.
• Coal is burned inside the combustion chamber of boiler.
• Gases which are at high temperature vaporize the water inside the
boiler to steam.
Water tube boilers: In these boilers water is inside the tubes and hot
gases are outside the tubes.
Fire tube boilers: In these boilers the product of combustion pass
through the tubes which are surrounded by water.
When the fluid flows through the turbine a part of the energy content is
continuously extracted and continuously converted into useful
Here three stages of turbine are used:
HP turbine (high pressure)
IP turbine (intermediate pressure)
LP turbine (low pressure)
Steam flow in the turbine-
• Super heater consists
group of tubes.
• Super heater remove
the moisture from the
steam leaving from the
• Economizer is a device
which recover the heat
from the flue gases on
their way to chimney.
• It increases the 10-12%
efficiency of the plant.
> It is basically a heat exchanger which convert steam
from its gaseous to its liquid state.
> It is situated below the turbine.
> In general it improves the efficiency of plant.
It is a tower- or building-like device in which atmospheric air (the heat
receiver) circulates in direct or indirect contact with warmer water (the
heat source) and the water is thereby cooled.
The transformation of mechanical energy into electrical energy is
carried out by the generator.
It is based upon the principle of electromagnetic induction and consist
of a stationary part called the stator and a rotating part called rotor.
The electric power generator requires direct current excited magnets
for its field systems.
It is a device that transfers electric energy from one alternating-current
circuit to one or more other circuits, either increasing (stepping up) or
reducing (stepping down) the voltage.
ASH HANDLING SYSTEM
Electrostatic precipitator: It is a device which removes dust or
other finely divided particles from flue gases by charging the particles
inductively with an electric field, then attracting them to highly
charged collector plates.
• The fuel used is quite cheap.
• Less initial cost as compared to other
• It can be installed at any place irrespective of
the existence of coal. The coal can be
transported to the site of the plant by rail or
• It require less space as compared to Hydro
• Cost of generation is less than that of diesel
• It pollutes the atmosphere due to
production of large amount of smoke and
• It is costlier in running cost as compared
to Hydro electric plants.
• The overall efficiency of thermal power
plant is less then 40 %.