Coal Handling & Transportation
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Transcript of Coal Handling & Transportation
COAL HANDLING SYSTEM
Specifications
Coal req for 600 MW 402 TPH
Working Hrs of CHS 16 Hrs
Rated system capacity 1400 TPH
Crushed coal storage capacity 21 Days
Stored size (-)25mm
Transportation through Trucks
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Unloading from port to
plant
Receiving & Feeding to
crusherStacking Reclaiming Blending Bunker
feeding
CHS – Flow Chart
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Coal size -25mm
Coal size -300mm
Belt conveyor Belt conveyor
Bunkers
Trunk conveyorTrunk conveyor
Metal detector (8A\8B)Metal detector (8A\8B)
Inline Magnetic Separator (9A\9B)Inline Magnetic Separator (9A\9B)
Travelling TripperTravelling Tripper
Inline conveyor scale (9A\9B)Inline conveyor scale (9A\9B)
Crusher
Belt feederBelt feeder
Stock pileStock pileTrunk conveyorTrunk conveyor SCR (Stacking)SCR (Stacking)
SCR (Reclaiming)SCR (Reclaiming)
Trucks (ROM coal)Trucks (ROM coal) Track hopperTrack hopper
Paddle feederPaddle feeder
ILMS (BCN3A\3B)ILMS (BCN3A\3B)
ScreenerScreener
Belt conveyorBelt conveyor
Direct feeding
Bottom opening broad gauge rail
(BOBRN) Wagons through track hopper
Sea borne coal handling system
By trucks ie., unloading by truck tripplers
or through track hopper
COAL UNLOADING METHODS
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Single truck capacity (40-60)T No of trucks req per hour 35 Trucks operation time per day 16hr
TRUCK
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75m length.
One rake storage capacity.
RCC construction with TISCRAL liners of 20 mm
thickness.
Provision for laying railway track on track hopper.
TRACK HOPPER
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Install under the track
hopper .
4 nos. ( 2 W + 2 S ).
Capacity 800 TPH .
PADDLE FEEDER
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Rotary discharge type
Hydraulic Driven
Vibrating Grizzly type screens. 1 working + 1 Stand by Each 1400 TPH capacity. Screening Size (-)25 mm
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SCREEN
1 working + 1 Stand by
Each 1400 TPH capacity.
Ring Granulator Type Crusher.
Lump coal size - 300mm
Crushed size - 25 mm
Crusher
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One working + one stand by Reversible rail mounted type. Operating on bi-directional conveyor ( 11&12). Stacking & Reclaiming Capacity 1400 TPH. Length of the Boom conveyor 43 m. Track gauge length 7 m. During Reclaiming 50 discharges of bucket
wheel per minute
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STACKER CUM RECLAIMER
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UNI DIRECTIONAL BI-DIRECTIONAL
Belt sway less and controllable
Power consumption is high
Belt sway is high
Power consumption is low
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** Though the initial cost of the bi-directional conveyor is high, it is been selected . Because the power consumption is less..
Trunk conveyor length 700m.
TRUNK CONVEYOR SELECTION
Trapezoidal Triangular
I. Pile formed by slewing of stacker
II. Boom conveyor length 43 m
III. More amount of coal can be stored
IV. High cost of SCR
I. Formed by Single point discharge
II. Boom conveyor length 30m
III. Less in amount
IV. Low cost of SCR
Proposed cross section ------------ TRAPEZOIDAL
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Stock Pile Comparison
40 M 500 M
8.75
M
Crushed coal storage capacity 21 days for 2*600 MW units
Total stock req including PLF 3,44,433 Tonnes.
No of piles 4
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STOCK PILE350
PARMETERS DESIGN COAL(50:50)
SM COAL INDIAN COAL
Proximate Analysis(ARB) In % In % In %
Ash 20.68 2.04 39.31
VM 27.59 33.98 21.20
FC 28.58 28.16 28.99
Sulphur 0.44 0.29 0.59
HGI 47 47 45
GCV in Kcal/Kg 3932 4134 3729
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WHY WE GO FOR BLENDING??
Blending = 50% SM coal + 50% high ash Indian coal .
Coal stored in different stockpiles would be blended by
reclaiming coal from different stock piles and
conveying the same on the common succeeding
conveyors.
Flow would be divided by flow dividers at the head
end of the trunk conveyors.
Not a homogeneous mix.
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Blending of coal
Rated capacity 1400 TPH.
Width 1400 mm.
Troughing Angle 350
Belt Speed 2.8 m/s.
With Fire retardant grade cover
Motor capacity 1.25 of the rated
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Belt conveyors
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BELT PULLEY
IDLERS
LOAD CELLS
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Conveyor Gallery
Walkways
Conveyor tunnel
Brakes
Belt Cleaners
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Belt Conveyor – Accessories
BrakesElectro-hydraulic thrustor brakes of fail safe design to adjust
the coasting time of the conveyors in order to prevent spillage of material
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V type internal belt cleaner
Sprung blade type belt cleaner
External belt cleaner
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BELT CLEANERS
ILMS Remove tramp iron & other magnetic
materials provided @ conveyors BCN- 3A/B & 9A/B
Metal detectorDetect non magnetic metal pieces & heavy
iron pieces Provided on BCN 9A/B
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@ BCN 1A/1B Measure & control of coal arrival
@ BCN 9A/9B Measure the amt of coal feed to
the boiler bunker.
In SCR Measure the coal avail in the
stock yard & to know the rate of
stacking & reclaiming
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METERING OF COAL
@ BCN 1A/1B Measure & control of coal arrival
@ BCN 9A/9B Measure the amt of coal feed to
the boiler bunker.
In SCR Measure the coal avail in the
stock yard & to know the rate of
stacking & reclaiming
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METERING OF COAL
@ BCN 1A/1B Measure & control of coal arrival
@ BCN 9A/9B Measure the amt of coal feed to
the boiler bunker.
In SCR Measure the coal avail in the
stock yard & to know the rate of
stacking & reclaiming
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METERING OF COAL
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Dry fog Compressed air + water.
Used to suppress and control dust in crusher
houses, junction towers and transfer houses.
principle of agglomeration.
Dust + fog droplets Settle down.
DUST SUPPRESSION
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THANK U…
Wagon tipplers for unloading BOX-N wagons.
Track hopper for receiving BOBR-N wagons .
Marshalling yard and railway track on the track hopper.
Four additional piles with two combined stacker cum reclaimer.
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FUTURE PLANS
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