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首页> 外文期刊>Drying technology: An International Journal >Experimental study on three-stage microwave-assisted fluidized bed drying of Shengli lump lignite
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Experimental study on three-stage microwave-assisted fluidized bed drying of Shengli lump lignite

机译：胜利块状褐煤三级微波辅助流化床干燥实验研究

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摘要

The drying characteristics of Shengli lump lignite in a three-stage microwave-assisted fluidized bed dryer (MFBD) are investigated in this study. The fluidized bed was operated with a continuous feed in the modes with one to three stages. The effects of microwave power and microwave time on the drying rate and fragmentation rate are studied. The drying rate of Shengli lump lignite increased with increasing microwave power. The fragmentation rate depended on microwave power, microwave time, and final moisture content. The fragmentation rate of dried lignite was in the range of 3-15%. Furthermore, an increase in fragmentation rate at a high microwave power correlates with an increase of the drying time. Pore size distribution in the lignite was determined by mercury intrusion porosimetry (MIP method). With increasing microwave power, total pore volume significantly decreased and average pore diameter was nearly unchanged.
机译：研究了三段式微波辅助流化床干燥机（MFBD）中胜利块状褐煤的干燥特性。流化床以一到三个阶段的模式连续进料操作。研究了微波功率和微波时间对干燥速率和破碎率的影响。胜利块状褐煤的干燥速率随微波功率的增加而增加。碎裂率取决于微波功率，微波时间和最终水分含量。干燥褐煤的碎裂率在3-15％的范围内。此外，在高微波功率下破碎率的增加与干燥时间的增加相关。褐煤中的孔尺寸分布通过压汞法（MIP法）测定。随着微波功率的增加，总孔体积显着减少，平均孔径几乎不变。

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