Cement, Energy & Environment Jan-Mar 2002

Energy Savings Electricity 485 million kWh (or avoided capacity equivalent to a 90 MW thermal power station) Furnace oil 0.221 million kilo litres (KL) Gas 392.9 million cubic metres Coal 0.479 million metric tonnes (MT) Courtesy : Tile Bulletin of Energy Effici~ncy, Dec. 2001, Pp. 6-7. E -mail: winrock@vsnl.com Web: www.renewingindia.org HIGH SULFUR FUELS - FIRED FOR ACTION Jean-Chris tophe Lene, Krupp Polysius The paper discusses as to how to overcome any difficulties encountered when converting to petcoke, the most commonly used alternative fuel. With a typical petcoke having a high sulphur content upto 7%, the author mentions that the total acceptable sulphur content in numerous operating plants around the world as less than 16-18g SO/kg ck in order to minimize the risk of encrustation/ blockages in the critical process areas. There are three fundamen tal methods mentioned in the article to reduce operating problems: • • • Bypass system Reducing sulphur evaporation Controlling the condensation location of evaporated sulphur Polysius French experience has been cited with figures of sulphur contents. Th e parameters that were varied were: • • 32 Burner orientation Burner position • Rate of meal bypassed to the meal curtain • Location of air cannons. After having several successful experiences of using petcoke the following recommendations were made in. the article for the benefit of the learners in the industry. • • • • Set the flame as short as possible Set a high excess air Set, at first, the burner centered in the kiln axis Variation of burner position and its orientation should be done one at a time Finally it is suggested to use their experience as a basis in plants intending to use the high sulphur content fuels. Courtesy: World Cement, Dec. 2001, Pp 28-32, Enquiry no: 4 E-mail: mail@worldcement. com Web: www. worldcement.com ONE STEP AHEAD Matthias Mersmann KHD Humboldt Wedag AG, Cologne In recent years, various innovations in grate cooler technology have been presented to the cement industry. However, some of these innovations fail to address important aspects of cooling process efficiency and instead offer solutions that do not appear to benefit the cooling process at all. In this article, Matthias Mersmann of KHD Humboldt Wedag showcases the latest PYROSTEP - Cooler, a new and effective cooling system and discusses how it is able to optimise the cooling process. Courtesy : In ternational Cement review June 2001. Pp 37-39 E-mail : info@CemNet_co. uk Web site: CemNet .co.uk