technical NOTES

A Typical Techno-commercial comparison of single string v/s Double string preheater
System:

S. N. Parameters Unit

Plant 1 Plant 2

Single

String

Double

String

1 Heat Consumption K-Cal/Kg 698 692

2 Rated Capacity TPD 4500 4500

3 Potential Capacity TPD 5500 5500

4 Annual Production at Potential

Capacity with 350 days operation

Tones/An-

num

1925000 1925000

5 Calorific value of Coal K-Cal/Kg 4000 4000

6 Coal Consumption at Clinker Production. % 17.45 17.30

7 Annual Coal Consumption Tones/An-

num

335913 333025

8 Rate of Coal Per Ton Rs/Ton 4500 4500

9 Coal cost/annum Rs.in Lacs 15116 14986

10 Loss due to More coal consumption in

Single string System/ annum

Rs in Lacs 130

11 POWER ON PYRO SYSTEM

12 Power Consumption at meter (pre heater

fan, kiln main drive, cooler drives, crusher,

cooling air fans, cooler vent fan)

kWh/Ton 16 15

13 Annual Power Consumption kWh 298 283

14 Power Tariff Rate Rs/kWh 4 4

15 Annual Cost of Power per Annum Rs (in Lacs) 1194 1132

16 Saving on Power Cost in Double String/

Annum

Rs (in Lacs) 62

17 POWER ON KILN FEED ELEVATOR

18 Power Consumption at meter (pre heater

fan, kiln main drive, cooler drives, crusher,

cooling air fans, cooler vent fan) at 5500

TPD

kWh/Ton 1 1

19 Annual Power Consumption kWh 19 15

20 Power Tariff Rate Rs/kWh 4 4

21 Annual Cost of Power per Annum Rs (in Lacs) 76 60

22 Saving on Power Cost in Double Stream Rs (in Lacs) 16

23 Variable cost per annum Rs (in Lacs) 16386 16178

24 CAPITAL COST ANALYSIS

25 COST OF REFRACTORIES