过热蒸汽流化床干燥流动特性实验

Experiment on Flow Characteristics of Fluidized Bed Drying with Superheated Steam

在对过热蒸汽流化床干燥过程中干燥室内过热蒸汽和颗粒物料之间流动特性的理论分析基础上,以油菜籽颗粒为实验物料,在小型实验装置上进行了过热蒸汽和热空气的流态化对比实验。实验结果分析表明,相同条件下过热蒸汽流化床干燥的操作速度比传统热空气流化床干燥的操作速度更大,在给定的实验工况条件下,油菜籽过热蒸汽流化床干燥的临界流化速度为1.26 m/s。

Based on the theoretical analysis of flow characteristics between superheated steam and granules materials in the fluidized bed drying chamber, the fluidization experiment with superheated steam and hot air was conducted by using the dried rapeseed particles as the experimental material. A small experimental device was established. The experimental results showed that the operating velocity of superheated steam fluidized bed drying was faster than the traditional hot air fluidized bed dying under the same conditions. Under the given conditions, the critical fluidization velocity of the rapeseed particles was 1.26 m/s during superheated steam fluidized bed drying.