Modeling and Drying of Carton Packaging Waste in a Rotary Dryer |
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Authors: | M. S. Bacelos C. D. F. Jesus |
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Affiliation: | 1. Universidade Federal do Espírito Santo, Centro Universitário Norte do Espírito Santo, Departamento de Engenharia e Ciências Exatas, Bairro Universitário , S?o Mateus, ES, Brasil;2. Universidade Federal de S?o Carlos, Centro de Ciências Exatas e de Tecnologia, Departamento de Engenharia Química , S?o Carlos, SP, Brasil |
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Abstract: | This research aims at modeling the rotary drying of carton packaging waste and analyzing the energy performance of the process. Drying data were obtained in a semi-pilot rotary dryer, 0.45 m diameter and 2.7 m rotating drum long, operating with an air velocity of 1 m/s and air inlet temperature of 90°C and 10 rpm. Under the operating conditions employed, the analysis of the data showed that the energy performance of the drying process increased from 5 to 75% as the inlet wet solid feed rate increased from 1.8 to 19 kg/h. In addition, at this latter wet-solid feed rate, the reduction of the air velocity in the dryer to 0.8 m/s also led to an increase in the performance of drying process from 80 to 94%. Furthermore, with a 95% confidence interval, the model used was adequate to predict the air and solid temperature as well as the air humidity and the solids moisture content. |
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Keywords: | Drying efficiency Energy efficiency Long-life packaging Recycling Rotary dryer Solid waste |
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