|
| 脉冲气流干燥器在粉煤灰干燥中的应用研究 |
| Application Research of Pulsed Pneumatic Dryer in Coal Fly Ash Drying |
| 投稿时间：2015-09-11 |
| DOI：10.16018/j.cnki.cn32-1650/n.201504006脉冲气流干燥器在粉煤灰干燥中的应用研究 |
| 中文关键词: 脉冲气流干燥器 粉煤灰 数值模拟 两相流动 压降 |
| 英文关键词: Pulsed Pneumatic Dryer Coal Fly Ash Simulation Experiment Two-Phase Flow Pressure Loss |
| 基金项目: |
|
| 摘要点击次数: 3548 |
| 全文下载次数: 3100 |
| 中文摘要: |
| 对脉冲气流干燥器在粉煤灰烘干中的应用效果进行研究，结合理论设计和数值模拟对粉煤灰颗粒在脉冲气流干燥器中的干燥过程进行分析。设计了适用于粉煤灰颗粒的脉冲气流干燥器，并利用Fluent 14.0软件模拟其干燥过程。结果显示:颗粒湿含量变化情况与理论计算相一致，每管段的颗粒湿含量下降速度都由大变小，颗粒终湿含量满足干燥要求；不同位置射入的颗粒轨迹不尽相同，但其在干燥器中的停留时间基本相同，保证了颗粒干燥的均匀性；较大粒径颗粒受内部传热速度较慢的影响，干燥效果较差，且干燥器中的压降随粒径的增大而增大。 |
| 英文摘要: |
| In this study, the application research of pulsed pneumatic dryer in coal fly ash drying is conducted. By combining the structure design and numerical simulation, the drying process is showed in this text. The pulsed pneumatic dryer for coal fly ash is caculated, and the drying process is simulated by Fluent 14. 0 software. The result shows that the changes of the particles moisture content is consistent with the theoretical calculation. The particles moisture content decreases in every segment. The final moisture content can fully meet the requirement. Particles injected from different positions move in different ways, but their residence time can keep at the same level, which ensure the particles dryed uniform. The drying result of the bigger particles shows worse than the smaller ones affected by the bad heat transfer rate. The pressure loss increases with the increase of particle size. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |