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Edit Comment Close Premium member Presentation Transcript COAL HANDLING SYSTEM : COAL HANDLING SYSTEM Specifications : 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 12/28/2009 10:35:52 PM 2 COAL HANDLING SYSTEM Slide 3: CHS – Flow Chart 12/28/2009 10:35:52 PM 3 COAL HANDLING SYSTEM Slide 4: 12/28/2009 10:35:52 PM 4 COAL HANDLING SYSTEM Slide 5: 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 12/28/2009 10:35:52 PM 5 COAL HANDLING SYSTEM Slide 6: Single truck capacity (40-60)T No of trucks req per hour 35 Trucks operation time per day 16hr TRUCK 12/28/2009 10:35:52 PM 6 COAL HANDLING SYSTEM Slide 7: 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 12/28/2009 10:35:52 PM 7 COAL HANDLING SYSTEM Slide 8: Install under the track hopper . 4 nos. ( 2 W + 2 S ). Capacity 800 TPH . PADDLE FEEDER 12/28/2009 10:35:52 PM 8 COAL HANDLING SYSTEM Rotary discharge type Hydraulic Driven Slide 9: Vibrating Grizzly type screens. 1 working + 1 Stand by Each 1400 TPH capacity. Screening Size (-)25 mm 12/28/2009 10:35:52 PM 9 COAL HANDLING SYSTEM SCREEN Slide 10: 1 working + 1 Stand by Each 1400 TPH capacity. Ring Granulator Type Crusher. Lump coal size - 300mm Crushed size - 25 mm Crusher 12/28/2009 10:35:52 PM 10 COAL HANDLING SYSTEM Slide 11: 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 12/28/2009 10:35:52 PM 11 COAL HANDLING SYSTEM STACKER CUM RECLAIMER Slide 12: 12/28/2009 10:35:52 PM COAL HANDLING SYSTEM 12 Slide 13: UNI DIRECTIONAL BI-DIRECTIONAL Belt sway less and controllable Power consumption is high Belt sway is high Power consumption is low 12/28/2009 10:35:52 PM COAL HANDLING SYSTEM 13 ** 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 Slide 14: Trapezoidal Triangular Pile formed by slewing of stacker Boom conveyor length 43 m More amount of coal can be stored High cost of SCR Formed by Single point discharge Boom conveyor length 30m Less in amount Low cost of SCR Proposed cross section ------------ TRAPEZOIDAL 12/28/2009 10:35:52 PM 14 COAL HANDLING SYSTEM Stock Pile Comparison Slide 15: Crushed coal storage capacity 21 days for 2*600 MW units Total stock req including PLF 3,44,433 Tonnes. No of piles 4 12/28/2009 10:35:52 PM 15 COAL HANDLING SYSTEM STOCK PILE 350 Slide 16: 12/28/2009 10:35:52 PM 16 COAL HANDLING SYSTEM WHY WE GO FOR BLENDING?? Slide 17: 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. 12/28/2009 10:35:52 PM 17 COAL HANDLING SYSTEM Blending of coal Slide 18: 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 12/28/2009 10:35:52 PM 18 COAL HANDLING SYSTEM Belt conveyors Slide 19: 12/28/2009 10:35:52 PM COAL HANDLING SYSTEM 19 BELT PULLEY IDLERS LOAD CELLS Slide 20: 12/28/2009 10:35:52 PM COAL HANDLING SYSTEM 20 Slide 21: Conveyor Gallery Walkways Conveyor tunnel Brakes Belt Cleaners 12/28/2009 10:35:52 PM 21 COAL HANDLING SYSTEM Belt Conveyor – Accessories Slide 22: Brakes Electro-hydraulic thrustor brakes of fail safe design to adjust the coasting time of the conveyors in order to prevent spillage of material 12/28/2009 10:35:52 PM 22 COAL HANDLING SYSTEM Slide 23: V type internal belt cleaner Sprung blade type belt cleaner External belt cleaner 12/28/2009 10:35:52 PM 23 COAL HANDLING SYSTEM BELT CLEANERS Slide 24: ILMS Remove tramp iron & other magnetic materials provided @ conveyors BCN- 3A/B & 9A/B Metal detector Detect non magnetic metal pieces & heavy iron pieces Provided on BCN 9A/B 12/28/2009 10:35:52 PM 24 COAL HANDLING SYSTEM Slide 25: 12/28/2009 10:35:52 PM COAL HANDLING SYSTEM 25 Slide 26: @ 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 12/28/2009 10:35:52 PM 26 COAL HANDLING SYSTEM METERING OF COAL Slide 27: @ 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 12/28/2009 10:35:52 PM 27 COAL HANDLING SYSTEM METERING OF COAL Slide 28: @ 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 12/28/2009 10:35:52 PM 28 COAL HANDLING SYSTEM METERING OF COAL Slide 29: 12/28/2009 10:35:52 PM COAL HANDLING SYSTEM 29 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 Slide 30: 12/28/2009 10:35:52 PM COAL HANDLING SYSTEM 30 Slide 31: THANK U… Slide 32: 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. 12/28/2009 10:35:52 PM COAL HANDLING SYSTEM 32 FUTURE PLANS Slide 33: 12/28/2009 10:35:52 PM COAL HANDLING SYSTEM 33 You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.