Operation of Coal Mill with and without Booster Fan
S.N. Operating parameters UOM
Without
booster fan
With booster
fan
4 Coal mill inlet flow m3/sec 46.2 46.2
5
Pressure Drop across
circuit mmwg^3314
6
Power drawn by coal mill
fan KW^477450
7 Coal mill Output TPH 40 40
8 Mill outlet temperature degC 78 78
9
False air entry due extra
draught %20
10
Fan Power increase due to
increase in false air KW 489.5^450
11
Overall increase in fan
power without booster fan’ KW 39.5^
12 SPC of coal mill fan’ Kwh/t 12.24 11.25
13 Increase in SPC Kwh/t 0.9875
14 Specific coal consumption
Kg coal/ Kg
Clinker 0.10
15 Clinker production TPD 9500
15 Running days
days/an-
num^335
16 Coal required T/Annum 306429.29
17 Difference in power KW/year 302598.92
18 Power cost Rs/KWH 3.40
19 Net savings/loss Rs/annum 1028836
- Note: Operating cost shall be validated with present condition
Conclusion: with above data comparison booster fan option is beneficial.
