100th Annual Report 2006-2007 - Tata Steel

Annexure 'A' to Directors’ Report
PARTICULARS REQUIRED UNDER THE COMPANIES (DISCLOSURE OF PARTICULARS IN THE REPORT OF THE BOARD OF
DIRECTORS) RULES, 1988.
A. CONSERVATION OF ENERGY
a) ENERGY CONSERVATION MEASURES TAKEN :
i) Conversion of boiler no. 5 & 6 stroker coal fired boilers at Power House No. 3 into by-product
gas fired boilers.
ii) Commissioning of 2nd LD Gas holder to enhance LD Gas Recovery.
iii) Phasing out of old and inefficient coal fired boilers at Boiler House No. 1
iv) Upgradation of E blast furnace to high top pressure operation thereby reducing blast furnace fuel rate.
b) ADDITIONAL INVESTMENTS AND PROPOSAL FOR REDUCTION OF CONSUMPTION OF ENERGY :
i) Modification of two numbers of stroker fired boilers into by-product gas fired boilers at Power House
No. 3 to reduce boiler coal consumption.
ii) Installation of Top recovery turbine at ‘G’ & ‘H’ Blast Furnace.
iii) Recovery of sensible heat of coke by installation of Coke Dry Quenching system in Batteries 5, 6 & 7
at Coke Plant.
iv) Phasing out of inefficient boilers and replacement of old and inefficient Blast Furnace blowers.
v) Use of lean by-product fuel at re-heating furnaces by adopting regenerative burner technology.
c) IMPACT OF THE ABOVE MEASURES :
Energy Conservation measures during 2006-2007 has resulted in achieving:
i) Lowest ever Plant Specific Energy Consumption of 6.717 Gcal/tcs.
ii) Lowest ever boiler coal consumption of 66.77 kg/tss.
iii) Lowest ever Plant Power Rate of 398.52 kwh/tss.
iv) Higher LD Gas Recovery of 55.51 NM 3 /tcs.
v) Lower specific oxygen consumption of 54.55 Nm 3 /tcs at steel melting shops.
vi) Reduction in process steam condensate loss of 23.12 tonnes per hour.
vii) Higher combine boiler efficiency of 81.48%.
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