Cement, Energy and Environment

ENVIRONMENT PROTECTION & RESOURCE MANAGEMENT Pollution Control NOx AND S0 2 TRADING An independent study by Ecofys/Emission Care (commissioned by CEMBUREAU) has been launched on the consequences which an industrial NOx and 802 emissions trading scheme (ET8) could have on the European cement sector. Titled "The ET8 paradox. Emissions trading for industrial NOx and 802 in the EU: consequences for the European cement sector". The report concludes that the window of opportunity for the introduction of an ET8 for NOx and 80 2 is small and therefore risky. As the ET8 for NOx and 80 2 would be introduced at a relatively late stage by which emissions will have already been substantially reduced through existing instruments. In addition, the introduction of a new policy instrument will add another element to the existing complexity of air pollution policies that the Commission is intending to simplify. The full study can be downloaded at: ecofys.com/com/publications/ brochures_newsletters/the_ets_para dox.htm The CEMBUREAU position on Entec study can be found at: www.cembureau.eu/nox-so2- trading-cembureau-position-entec– study Courtesy: ZKG International No. 7/8-2010, P14. REDUCING THE LCC OF DEDUSTING FILTERS -THE NEW PROJET SMAR~ AND PROJET MEGA®FILTER SERIES Dr.-lng. Gunnar-Marcel Klein 1 , Markus Blech 2 , Frank Otf, Dip/. -lng. (FH)Tim Neuhaus 4 , Dipl.-lng. Theo Schrooten 5 1 Technical Director, 2 Head of Development Design, 3 Head of Production, 4 Head of Development, 5 Head of Technology lntensiv-Filter GmbH & Co. KG, Velbert-Langenberg!Germany Summary: The newly developed lntensiv-Filter ProJet smart® and ProJet mega® completely cover the volume flow range of 2000 m 3 /h a.c. up to over 3000000 m 3 /h a.c. required in the cement and stone/earth industries. With bag lengths up to 12 m, the Pro Tex filter media generation combined with the latest cleaning technology, and flow-side optimization of the filter design, the LCC (Life Cycle Costs) can be reduced by up to 40%. The consistent standardization at module level has resulted in an almost unlimited number of different filter versions being available with minimum variance in the individual components. This enables modern and made– to-order dedusting solutions to be conceived and supplied quickly and flexibly for every requirement in the cement industry. Introduction In 2009 and 2010, lntensiv– Filter converted the established bag filter product lines into improved, standardized and modular filter series. These offer lower specific investment costs and, above all, a reduction in the operating costs and thus life cycle costs (LCC) for the filtering installation. For better orientation in the increasingly more complex world of dedusting, the features of modern online and offline bag filters will first be explained and then the technical innovations involved in the ProJet smart® and ProJet mega® product lines will be introduced. Features of modern jet pulse bag filters in online mode Jet-pulse bag filters in online mode can manage without the raw gas room being subdivided into single filter chambers and also without clean gas and raw gas flaps. The filter bags are cleaned cyclically during the filtering operation by means of a pressure surge. This is passed from the valve block (compressed air tank) into the filter bags via diaphragm valves and various injector systems. In this connection , an overpressure is built up within a very short period of time (under 0.5 s) in the filter bag which leads to the mechanical expansion of the bag and to the filter cake deposited on the outer side of the bag being blasted off. At the same time, the filter bag's direction of flow through is reversed temporarily, which supports the removal the dust layers. Immediately after this, the filter bag is returned once more to the filtering position at the supporting cage as a result of the raw gas flow and the filtration cycle begins again. The removed agglomerates sediment during complete filtering operation - in the dust collection hopper. The advantages of this mode of operation consist of the minimization of the filter area deactivation during the cyclical regeneration. To this end, the capacity usage of the filter area available for filtration is at a maximum in 46 -