Cement Energy Environment

56 Earlier kiln-2 coal firing burner was M/S FLS Duoflex burner where the % of primary air consumption was 12% . Compared with Duoflex burners, the main changes with the Low NOx Pyro jet burners is the jet air nozzles design. As per jet air nozzle design, no chance of flame Replaced existing kiln burners with Low NOx KHD Pyro jet burners in all three kilns for thermal efficiency improvement divergence is there and maintaining high tip velocity with low primary air helps in increase of secondary air flow to the kiln. This ensures that the thermal efficiency of the kiln is improved. After achieving the thermal reduction, we have implemented the similar modification in all three kilns. Benefits achieved As a result of the interventions, total annual cost saving of INR 135 Lakhs including 120 Lakhs from thermal energy savings (5 kcal / kg clinker reduction) and 15 Lakhs from electrical energy savings (0.11 Kwh / MT Clinker) was achieved in this kiln burner replacement. Low NOx KHD Pyro jet burner % of Primary air Reduction Power Reduced Kiln Sp. heat Reduction Annual savings Investment Description % % Kcal/kg clinker Lakh/Annum Lakh UOM 6 20 5 40.9 1.2 Kin-1 6 10 5 55.9 1.2 Kiln-2 4 10 3 38.6 1.4 Kiln-3