Title: Experimental Study on Drying and Reabsorption of the Lignite of Ximeng
Abstract:The rapid moisture-determining instrument was used to simulate the process of constant temperature drying on the lignite of Ximeng from the Inner Mongolia.By using the scanning electron microscope(SEM...The rapid moisture-determining instrument was used to simulate the process of constant temperature drying on the lignite of Ximeng from the Inner Mongolia.By using the scanning electron microscope(SEM),it was observed that the surface morphology of dried coal is changed,such as breaking down and pulverization.Different drying temperatures(70,100,120 ℃),particle sizes(0.5~0.6,0.6~1.6,1.6~4 mm),and drying time(2,3.5,9,30 min) were chosen to study the features of drying and reabsorption of the lignite.The results show that the drying process is mostly affected by the particle size and temperature;the reabsorption amount of water mainly depends on the moisture of the dried coal,the damage of the void structure,the particle size and the variation of the environment humidity.Among common thin layer drying models,Modified Henderson and Pabis model shows the better predictions.At the same time,the effective diffusivity coefficient and the activated energy for the moisture diffusion are calculated by applying the Fick’s diffusion model and Arrhenius type relationship.Read More
Publication Year: 2013
Publication Date: 2013-01-01
Language: en
Type: article
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Cited By Count: 8
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