Drying kinetics of RDF: Experimental investigation and modeling
| Autor: | Jarosław Frączek, Bogusława Kordon-Łapczyńska, Karolina Słomka-Polonis |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Environmental Engineering
Municipal solid waste Moisture lcsh:QP1-981 020209 energy Diffusion Metallurgy lcsh:QR1-502 Fraction (chemistry) 02 engineering and technology Thermal diffusivity Industrial and Manufacturing Engineering Crusher lcsh:Microbiology lcsh:Physiology 020401 chemical engineering lcsh:Zoology 0202 electrical engineering electronic engineering information engineering lcsh:QL1-991 0204 chemical engineering Water content Air dryer |
| Zdroj: | BIO Web of Conferences, Vol 10, p 02030 (2018) |
| ISSN: | 2117-4458 |
| Popis: | An experimental study was performed to determine the drying characteristics of an oversized fraction of RDF alternative fuel using a laboratory scale hot air dryer at a variety air temperatures and a constant air velocity. For this research the industrial RDF was derived from a Regional Municipal Waste Treatment Facility near the city of Kraków, Poland. The samples of RDF were prepared in two forms: ovesized (unmodified condition) and shreded in a two-drum crusher. In addition, the RDF was sorted into three groups of samples: paper, plastic, textiles. Each form of RDF and each group of samples were dried in hot air dryer at temperatures of 50, 70 i 90 °C and a constant air velocity of 1,5 [m·s-1]. The loss of the the samples mass were measured in a continues manner until the equilibrum moisture content was reached. The effective moisture diffusivity [m2·s-1] and activation energies [kJ·mol-1] was amounted. The analysis of the course of moisture content change concludes that that the drying of the RDF alternative fuel occured mainly in the II period of the process during which the transport of water content was carried out by diffusion. And, to a lesser extent, with the surface heat transfer in II period. Based on the calculated data there was a model determined which presented the best possible matching of the course of moisture content change. |
| Databáze: | OpenAIRE |
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