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COAL HANDLING PLANT
The coal handling plant was commissioned to unload the coal from the wagon and
deliver it to coal bunker or to stack it in the yard as per requirement. The coal are
dumped by the wagon tippler or the track hopper and conveyed to the bunkerthrough different conveyors, crusher ,vibrator, screen, stacker cum reclaimer. The
main moto is to keep healthy bunker position and to release maximum no.s of
wagons after unloading within a specific time to reduce the demurrage.
The coal is pulverized for complete combustion. The reason is
1. For maximum air contact .
2. Good heat value for proper oxygen.
PLOUGH FEEDER
The plough mechanism is carried and transported on a heavy duty,
self propelled , four wheeled frame that runs on the rails directly above the
conveyor structure.
VIBRATORS
a) MECHANICAL VIBRATING FEEDERS
These vibrators are located below the surge hopper which
receives coal from conveyor. One discharge the coal from
hopper by vibrating mechanically.
Rated capacity:-600-800 ton/hr
Designed capacity:-960 ton/hr
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b) ELECTROMAGNETIC VIBRATING FEEDERS
The electromagnetic vibrating feeders are situated
Below wagon tippler hoppers
Below sick wagon unloading hoppers.
Below reclaim hoppers.
It separates magnetic material from the coal.
WAGON TIPPLER
Two rotary type wagon tipplers are located on a two rail tracks that are arranged in
parallel. The tipplers can rotate by 170 degrees in one direction.
VIBRATING SCREEN
It is installed before the crusher to screen out coal particles of size less than 20
mm.
CRUSHER
Generally the power station is having secondary crusher for crushing coal to size
less than 20 mm. i.e. the size before feeding to the coal bunker.
STACKER CUM RECLAIMER
These are installed on conveyor. The equipment, stacker is meant for stacking coal
when there is no demand of coal feeding to bunker but there are loaded wagons of
coal. Reclaimer is an equipment that reclaims coal to bunker when there is no
supply.
MOBILE TRIPPER
The tripper is provided in the conveyor to feed the material at desired location on
either side or along the conveyor with the help of chutes fitted with tippler itself.
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MAGNETIC SEPARATOR
The cross belt magnetic separator should be mounted such that the magnet
cleaning belt is at right angle to the conveyor belt over which it is installed.
CONVEYOR BELT
Coal is being carried from one point to other by conveyor that are belts. Conveyor
rotates upon different types of pulleys such as head pulley, tail pulley, snub pulley,
bend pulley, take up pulley, carrier side idler roller, return side idler roller, self
aligning roller, guide roller etc.Generally head pulley on discharged pulley is
rubber lagged to increase the co-efficient of friction. Snub pulley is used to
increase the area of contact of drive pulley with conveyor belt. Take- up pulley is
assigned to take the elongation of belt. Three types of take-up are used- vertical
gravity take-up, horizontal gravity take-up, horizontal screw take-up.4-ply nylon
belt is now being used in K.T.P.S.
SNUB DRUM
Its action is to
Minimize friction of the belt.
Increase contact point to take the load.
Maintaining constant speed.
DUST EXTRACTION SYSTEM
A dust extraction system is installed to extract the dust generating source to a dust
collector and releasing the dust free air into the atmosphere. The dust is transported
in a fluidized state after mixing with air through the ducting. The receiving hoods
are installed at dust generating points to catch all the dusts.
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