RDF, the high caloriﬁc value fraction of MSW obtained by conventional separation systems, can be employed in technological plants (mainly cement kilns) in order to obtain a useful energy recovery. It is interesting and important to evaluate this possibility within the general framework of waste-to-energy solutions. The solution must be assessed on the basis of diﬀerent aspects, namely: technological features and clinker characteristics; local atmospheric pollution; the eﬀects of RDF used in cement kilns on the generation of greenhouse gases; the economics of conventional solid fuels substitution and planning perspectives, from the point of view of the destination of RDF and optimal cement kiln policy. The diﬀerent experiences of this issue throughout Europe are reviewed, and some applications within Italy are also been considered. The main ﬁndings of the study are that the use of RDF in cement kilns instead of coal or coke oﬀers environmental beneﬁts in terms of greenhouse gases, while the formation of conventional gaseous pollutants is not a critical aspect. Indeed, the generation of nitrogen oxides can probably be lower because of lower ﬂame temperatures or lower air excess. The presence of chlorinated micro-pollutants is not inﬂuenced by the presence of RDF in fuel, whereas depending on the quality of the RDF, some problems could arise compared to the substituted fuel as far as heavy metals are concerned, chieﬂy the more volatile ones.
Perspectives and limits for cement kilns as a destination for RDF / G. GENON; BRIZIO E.. - In: WASTE MANAGEMENT. - ISSN 0956-053X. - 28, issue 11(2008), pp. 2375-2385. [10.1016/j.wasman.2007.10.022]
|Titolo:||Perspectives and limits for cement kilns as a destination for RDF|
|Data di pubblicazione:||2008|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/j.wasman.2007.10.022|
|Appare nelle tipologie:||1.1 Articolo in rivista|