DBPapers
DOI: 10.5593/SGEM2014/B51/S20.018

CHANGE OF TECHNOLOGY FOR COLLECTING, TRANSPORT AND STORAGE OF SLAG AND ASH RESULTING FROM FOSSIL FUEL COMBUSTION WITHIN ELECTROCENTRALE DEVA

G. L. Dobrei
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-17-9 / ISSN 1314-2704, June 19-25, 2014, Book 5, Vol. 1, 129-136 pp

ABSTRACT
In order to line up with the European requirements regarding environmental and energy efficiency as a result of Romania’s accession to the European Union, it is required the technological rehabilitation of coal plants, namely the fulfilment of installations for flue gas desulphurization and the review of the existing disposal, transport and storage systems of products resulting from the combustion of coal in power units’ boilers. For further proper operation, Electrocentrale Deva (Mintia Thermal Power Plant) is required to make investments to reduce the environmental impact of ash and slag deposits, this being possible through the implementation of new technologies, such as dense slurry technology. This paper shows the concerns of Electrocentrale Deva on environmental impact in terms of air, water and soil, by implementing a new technology for disposal and transport of waste coming from the combustion of fossil fuels. Changing this technology will provide the reduction of "excess water" volume, seeking to reduce the content of the hydro-mixture: 1 part slag - ash - 10 parts water, used in the old technology (1:10) at a ratio of 1:1.1 using the dense slurry technology. By implementing this technology and building a new storage, starting with 01.01.2016, it shall be observed the current European legislation (Directive 1999/31/EC on waste discharge and storage) which will make possible the continuous operation of Mintia thermal power plant.

Keywords: fossil fuels, combustion process, environment, collecting slag and ash, dense slurry, hydro-mixture, desulphurization installation, large combustion plants.