Ash Coal Estimation
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Peak daily coal requirement Peak daily coal requirement shall be met by 14 hrs operating hours of coal handlingplant so that balance 10 hrs per day are available for upkeep and maintenance. Ten (10%)percent margin shall be considered over the peak daily coal requirement (based on GC of worst coal and normative heat rate) for arriving at the rated capacity of the coalhandling plant. Margin is provided to take care of the variation in the GCV of the coalreceived, aging of the equipment and different operating conditions of the CHP equipment. Typically for a 2x500 MW plant, capacity is worked out as under Plant Capacity MW 1000 800.00 700.00 500.00 Heat Rate 2 kCal/kWh 2450 2450.00 2450.00 2450.00 Energy/h kwh/h 1.00E+09 8.00E+08 7.00E+08 5.00E+08 PLF 100% 1.00 1.00 1.00 Heat generated kcal/h 2.45E+09 1.96E+09 1.72E+09 1.23E+09 GCV of Worst Coal kCal/kg 3150 3150.00 3150.00 3150.00 Specific coal requirement kg/kWh 0.78 0.78 0.78 0.78 Daily Coal Requirement Tons 18666.7 14933.33 13066.67 9333.33
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ESTIMATION OF COAL AND ASH FOR THERMAL PLANTS WITH INPUTS AS INSTALLED CAPACITY.THE DETAILS SERVE AS GUIDELINES FOR FIXING SIZES OF COMPONENTS
Transcript of Ash Coal Estimation
Peak daily coal requirement
Peak daily coal requirement shall be met by 14 hrs operating hours of coal handlingplant so that balance 10 hrs per
day are available for upkeep and maintenance. Ten (10%)percent margin shall be considered over the peak daily
coal requirement (based on GC of worst coal and normative heat rate) for arriving at the rated capacity of the
coalhandling plant. Margin is provided to take care of the variation in the GCV of the coalreceived, aging of the
equipment and different operating conditions of the CHP equipment. Typically for a 2x500 MW plant, capacity is
worked out as under
Plant Capacity MW 1000 800.00 700.00 500.00
Heat Rate 2 kCal/kWh 2450 2450.00 2450.00 2450.00
Energy/h kwh/h 1.00E+09 8.00E+08 7.00E+08 5.00E+08
PLF 100% 1.00 1.00 1.00
Heat generated kcal/h 2.45E+09 1.96E+09 1.72E+09 1.23E+09
GCV of Worst Coal kCal/kg 3150 3150.00 3150.00 3150.00
Specific coal requirement kg/kWh 0.78 0.78 0.78 0.78
Daily Coal Requirement Tons 18666.7 14933.33 13066.67 9333.33
Hourly Coal Requirement TPH 777.78 622.22 544.44 388.89
Peak daily coal requirement for BMCR flow TPH 833 666.4 583.1 416.5
Working Hours Hrs 14 14.00 14.00 14.00
Plant Capacity TPH 1428 1142.40 999.60 714.00
Add 10% margin TPH 142.8 114.24 99.96 71.40
Rated Capacity TPH 1570.8 1256.64 1099.56 785.40
Rated Capacity (rounded off) TPH 1600 1300.00 1100.00 800.00
Ash percentage 0.46 0.46 0.46 0.46
Ash generated TPH 383.18 306.544 268.226 191.59
ESP Ash 90.00% TPH 344.862 275.8896 241.4034 172.431
APH ash 5.00% TPH 19.159 15.3272 13.4113 9.5795
Chimney Ash 0.50% TPH 1.9159 1.53272 1.34113 0.95795
Total Fly Ash TPH 365.9369 292.74952 256.15583 182.96845
Evacuation time per shft Hrs 6 6 6 6
Fly ash evacuation capacity TPH 487.92 390.336 341.544 243.96
Furnace Bottom Ash 25.00% TPH 95.795 76.636 67.0565 47.8975
Economiser ash 5.00% TPH 19.159 15.3272 13.4113 9.5795
7.100%
Typically, two streams of conveyors and equipment shall be provided for coal handlings ystem with
rated capacity of 1600 TPH for a 2 x 500 MW power plant. Rated capacity would vary with
calorific value of the coal intended to be used. Capacities of differ equipment for 2x500 MW plant shall be under.
slNo Equipment No. of equipment Typical rated capacity(
Factor
Rated capacity 1000
1 Track Hopper 1 6000 M T 6
1a Paddle Feeder 2x75% (W)+2x75% (S) 1200 TPH 1.2
1b Wagon Tipplers 2 (W) +1 (S)20 Tips/hr 800 TPH
0.8
1c Apron Feeders 2 (W) +1 (S)20 Tips/hr 800 TPH
0.8
2 Crushers 2x55% (W)+2x55% (S) 880 TPH 0.88
3 Vibrating grizzly screens 2x55% (W)+2x55% (S) 880 TPH 0.88
4 Vibro - feeders for emerge 6 nos. (as per requirement) 450 TPH 0.45
5 . Stacker-reclaimer (S-R)1X100% 1600 TPH 1.6
6 Conveyors 2x100% (1W+1S) 1600 TPH 1.6
7 Yard Conveyor 1 per S-R 1600 TPH 1.6
