Cement, Energy and Environment July-Sep 2002

• - J -1 Figure 2 depicts the progressive reduction in power consumption for C(!ment (OPC 43) and clinker production from 1997-98 to 2001-02 at Birla Cement Works, Chittorgarh 105 102.58 -+- Clinkerisation 100 -a- OPC 43 Gr.~ 95 z 90 0 85 1- - !::: 80 z 75 ::;:) 70 65 70.58 ~--5_2_s_.:·_3_8_s-.:.1 60 97-98 98-99 99-00 2000-01 2001-02 YEAR Figure 2 Progressive reduction in power consumption at Bir/a Cemerrt Works. Measures at Chittor Cement Works A similar account of the energy conservation measures implemented and the savings accrued therefrom at Chittor Cement Works is given in the following paragraphs : 1997-1998 }> Raw mill section • Replacement ofthe vent fan by high-efficiency fan. }> Kiln section • Replacement of the cooler • • • • vent fan by high-efficiency fan. Replacement ofthe number of motorised a ir sluice below BDC hopper by leak-proof gravity flap valves. Optimisation of kiln and precalciner (PC) firing air by reducing blowers' rpm. Replacement of the cooling– tower-fan aluminium blades by fibre-reinforced plastic (FRP) blades. Stopping of the raw coal feeding group BDC's during monsoon months. ~ Cement mill section • Optimisation of the cement transport air by reducing the speed of compressors for both cement mills. • Optimisation of compressed air distribution. }> Packing Plant Section • Twenty-two numbers of motorised bag deflectors replaced with fixed polymer bag deflectors. The respective investments for the foregoing measures and the savings accruing therefrom are summarised in the Table on the next page: m