Microwave drying characteristics and energy consumption analysis of dredged sediment
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Abstract:
In this paper, microwave drying of dredged sediment was carried out using domestic microwave oven in order to ex2 plore a new way of effective dry processing for dredge sediment. Effects of different sediment thicknesses and microwave power outputs on the drying characteristics of dredged sediment by microwave energy were discussed and the unit energy consumption was analyzed, and thin layer drying modelwas introduced to simulate the drying process. The results showed that the decreasing rate of dry basis moisture content reduced and the drying time extended with the increasing of sediment thickness successively the drying time shortened significantly with the increasing of the powers; and the maximum drying rate of 10 mm thick sediment was about 3. 0 times of that of 40 mm thick sediment. T he unit energy consumption analysis showed that the unit energy con2 sumption was lower under 280 W for different thicknesses of sediment, and energy utilization was more effective. Modified Page 2 I model was determined to be applicable to analyze the microwave drying of sediment through the analysis of experimental data, and the model had good fittings. Therefore, the model can be used to predict the drying time for different thicknesses of dredged sediment with different moisture contents.
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