A one-dimensional model for RDF thermo-chemical conversion on a moving grate of a full scale incineration plant
| Autor: | M.La Villetta, F.Marias, M.Costa, N.Massarotti |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | The 28th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, Pau (France), June 30-July 3-2015 info:cnr-pdr/source/autori:M.La Villetta, F.Marias, M.Costa, N.Massarotti/congresso_nome:The 28th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems/congresso_luogo:Pau (France)/congresso_data:June 30-July 3-2015/anno:2015/pagina_da:/pagina_a:/intervallo_pagine |
| Popis: | Incineration with energy recovery of refuse derived fuel, although being a valuable alternative to waste landfilling, inevitably implies the production of greenhouse gases and the emission of harmful species to human health. The European Directive on construction and operation of incineration plants fixes strict rules on the temperature and residence time of the combustion products within the combustion chambers. Although after-treatment technologies can be used to reduce emissions, it is also necessary to act directly on the combustion process to limit pollutants formation. Developing appropriate simulation models of waste-to-energy plants, therefore, appears extremely important as a way to better control the whole energy conversion. This work presents a phenomenological model of the thermal conversion of refuse derived fuel into volatiles and residuals (inert char and ash), as occurring on the grate of a real scale waste-to-energy plant. The model is one-dimensional along the grate and reproduces drying, pyrolysis, gasification and combustion of the solid fuel, as it moves invested by the primary air flow and the heat flux due to radiation from the top. The released syngas composition and temperature are determined by a numerical procedure properly accounting for the stiffness of the problem arising during solution. The model results can be used as boundary conditions for the governing equations of the gaseous turbulent reacting flow in the so-called freeboard of the combustion chamber, to fully account for the strict link between the conversion of the solid fuel on the grate and the gaseous combustion of released volatiles |
| Databáze: | OpenAIRE |
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