CEE Jan-Mar 2012

.. pack and load approximately 100 tph or about 3,000 tpd of cement considering 15 hrs of effective operations. Hence no new capacity addition was proposed. 8. ACHEIVEMENTS AFTER IMPLEMENTATION • The kiln is operating at sustained output level of 2,300 tpd clinker @ kiln speed of 4.5 rpm and specific volumetric and thermal loading of 6.1 tpd/m3 and 3.58 Gcal/h/m2 respectively. Further enhancement in production was restricted due to imposed kiln speed restriction to 4.5 against recommended speed of 5.0, till the pending modifications in the drive system. • The preheater exit pressure reduced from 850 mmWG at 2 ,000 tpd clinker to 550 mmWG at 2325 tpd clinker. • Preheater fan inlet pressure (after damper) reduced from 850mmWG at 2,000 tpd to 610 mmWG at 2,325 tpd. • The return dust in preheater down comer duct reduced from above 12% at 2,000 tpd to 8% at 2,325 tpd. • The raw meal to clinker factor improved from 1.7 to 1.6 after the improvement in cyclone efficiency and reduction in return dust • The cyclone pressure drops reduced as per the table 1 given below: • Specific heat consumption reduced to 750 kcal/kg clinker from 825 kcal/kg clinker. Table-1 : Comparison of Pressure drop before and after modification Pre-Heater Stages I Pressure Drop I Pressure Drop @ 2,000 tpd (before i @ 2325 tpd modification) j (after modification) Cyclone 1 A Cyclone 1 B Cyclone 1C Cyclone 2 Cyclone 3 Cyclone 4 A Cyclone 4 B Cyclone 5 180 110 118 130 125 165 • The overall specific power consumption reduced by 10 kWh/t clinker • The coal mill production increased from 14 tph to an average 17 tph. 9. CONCLUSION The process optimisation through technical audit is an effective tool to improve the plant performance in terms of optimum capacity utilisation, savings in energy consumption, reduction in maintenance cost, improved product quality and improved consistency in plant operation. Process optimisation study also covers the potential capacity of the plant and measures to achieve the same . [ _ Energy Efficiency~ INDIA, SWITZERLAND INK DEAL FOR ENERGY EFFICIENCY India and Switzerland have signed an agreement to cooperate in the development of energy-efficient buildings 65 85 95 115 115 45 through the use of advanced Swiss technologies. Philippe Welti, Swiss ambassador to India and joint secretary in the Power Ministry Devinder Singh recently signed a memorandum of understating (MoU) for cooperation in the real estate sector, according to a statement by the Swiss embassy here recently. 'The MoU is for a period of five years and aims at reducing energy consumption in new buildings in India,' the statement said. The objective of the initiative is to build capacities and knowledge of builders, architects, engineers, labs, institutions and others, in the area of building energy efficiency in India by utilizing Swiss experience and expertise, and by following a multi-stake– holders cooperation process, it said. Courtesy: Total Energy, Nov.- Dec. 2011, P22. 11