| 引用本文: | 冯彬彬,唐正宁.粉体在袋装充填过程中的扬尘规律[J].包装工程,2017,38(7):105-109. |
| |
|
| |
|
|
| 本文已被：浏览 3089次 下载 2806次 |
码上扫一扫！ |
|
|
| 粉体在袋装充填过程中的扬尘规律 |
|
冯彬彬1, 唐正宁2,3
|
|
1.江南大学，无锡 214122;2.1.江南大学，无锡 214122;3.2.江苏省食品先进制造装备技术重点实验室，无锡 214122
|
|
| 摘要: |
| 目的 在不同充填高度下探究粉体扬尘的影响因素和分布规律。方法 基于气固耦合机理，分析粉体在袋装充填时与空气的相互作用。采用Fluent软件，选择κ-ε湍流模型与离散相模型模拟粉体下落扬尘过程。将颗粒浓度、空气流速和颗粒追踪占比3项作为分析依据，确定粉体充填的合理高度。结果 扬尘主要由卷吸空气引起，在粉袋内颗粒会产生大量回流；粉体距袋口80～480 mm时充填扬尘量最小。结论 通过改变袋装充填的充填高度能有效减少粉尘的产生。 |
| 关键词: 粉体扬尘 气固耦合 袋装充填 |
| DOI： |
| 分类号:TS206 |
| 基金项目: |
|
| Behavior of Fugitive Dust in the Process of Filling Powder in the Bags |
|
FENG Bin-bin1, TANG Zheng-ning2,3
|
|
1.Jiangnan University, Wuxi 214122, China;2.1.Jiangnan University, Wuxi 214122, China;3.2.Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment & Technology, Wuxi 214122, China
|
| Abstract: |
| The work aims to explore the influencing factors and distribution law of powdery fugitive dust under different filling heights. Based on the gas-solid coupling theory, the interactive effect between particles and air was analyzed during powder filling. The falling powdery fugitive dust was simulated by FLUENT under κ-ε turbulence model and discrete phase model (DPM). The particle concentration, the air speed and the particle tracking proportion were analyzed to confirm the reasonable height of powder filling. Air entrainment was the main factor resulting in fugitive dust, leading to plenty of backflow of particles in the powder bag. Moreover, when the power was 80 mm to 480 mm from the bag mouth, the filling amount of the fugitive dust was the minimum. The fugitive dust can be effectively decreased by changing the height of powder filling in the bag. |
| Key words: powdery fugitive dust gas-solid coupling filling |
|
