Cement, Energy and Environment

Courtesy : World Cement, Apr 02, Pp 51-54, Enquiry No.7. Email: mail@worldccment.com Web: www.worldccment.com Fax: +44 (0) 1252 718992 . PETCOKE COMBUSTION CHARACTERISTICS Gary R. Roy, F. L. Sm idth, USA, Cement producers all over the world are striving to lower their production costs, one effective me thod of which is the subs titution of traditional fuels such as coal, oil and natural gas w ith pe tcoke . Its high sulphur content can present operational difficulties if not properly addressed, and the fact that it bums a t a much slower ra te than normal coals means that for man y existing kiln system it is not possible to fi re 100% pc tcoke in the kiln a nd ca lciner without special design considerations. This article highlights the equipment and the experience from several plants tha t have been designed or modified by F. L. Smidth to enable 100% pe tcoke firing. Courtesy : World Cem ent April 2002, Pp71-74, Enquiry No. 14, Fax: +44(0) 1252718992 Email: mail @ worldcement.com Web: www. worldcement.com ENERGY MINIMISING CONCEPT Peter Harfmann, Inspec Fibres GmbH, Austria The EMC (Energy Minimising Concept) , is based on low pressure, pulse-jet cleaning. This further d evelopment of Scheuch 's already proven impulse cleaning system opera tes not onlywith a low required volume of compressed air. The Concept implements a Zero Flow Design that makes it possible to gently clean the filter bags. The newly developed system cleans the filter bag so effectively and with such lasting effect that the plant operator can run the filter at a lower differential pressure. P84 from Inspec Fibres is an already well l<"n own filter bag mnterial widely used in kiln and mill dedusting systems in the cemen t industry. Due to the irregular lobed surface of the fibre the filter bags provide outstanding fil tration efficiency at low differential pressure d uring bag house operation. High dus t load during compOtmd operation and peak tempera tures up to 260 oc while switching to direct opera tion, means that a hi ghl y mech a nica lly d urab le and heat resis tant material needs to be used . P84 filter bags fulfil all the requested properties, wh ich lead to a long-term se rv ice life wi thout mmecessarily caused failures. However, Lafarge Perlmooser had to step into a new technology of baghouse d cdusting systems developed by the Austrian baghouse OEM Scheuch for the exhausts of kiln and raw mill in both operation modes. In additi on to the si g nifi ca ntly red u ced opera ting costs (see also the Scheuch article in the World Cement, Feb ruar y 2002), an additional prolonga tion of the usual bag service life by up to 50% can be expected. Courtesy: World Cemen t April 2002 Pp117-120, Enquiry No. 19, Fax: +44(0) 1252718992 Email: mail@ worldcemen t.com Web: www. worldcement.com PROCESSING COAL TO MEET POWER PLANT REQIREMENTS- PART 1 A.K. As tl1ana, Director, and Jacob Kurian, Assistan t Director, Energy management Di visi on, National Productivity Council Altho ugh the need fo r non-cokin g coal beneficiation has been felt for a long time in India , there are s till limited wash eries. However, the recent mandate of the Ministry of Environment and Forests (MoEF) for using washed coal in power plants has added a new urgency for making progress in this area. In the ... \ . ~.-