• 流动与传递 •

### 基于气流均匀分配的下进风袋式除尘器灰斗结构优化

1. 1. 西安建筑科技大学环境与市政工程学院，陕西 西安 710055；2. 西安建筑科技大学材料与矿资学院，陕西 西安 710055
• 收稿日期:2017-03-09 修回日期:2017-03-31 出版日期:2017-12-20 发布日期:2017-12-05
• 通讯作者: 王怡
• 基金资助:
国家自然科学基金重点资助项目;国家杰出青年科学基金

### Structural Optimization for Hopper of Bottom Inlet Bag Filter Based on Airflow Uniform Distribution

Meitao REN1,  Yi WANG1*,  Honggang YANG1,2,  Xiaoni YANG1

1. 1. School of Environment and Municipal Engineering, Xi’an University of Architecture &Technology, Xi’an, Shaanxi 710055, China; 2. College of Materials & Mineral Resources, Xi’an University of Architecture &Technology, Xi’an, Shaanxi 710055, China
• Received:2017-03-09 Revised:2017-03-31 Online:2017-12-20 Published:2017-12-05

Abstract: The computational fluid dynamic simulation of the airflow inside a bag filter was carried out, three optimized structures of the hopper were proposed to improve the original hopper structure. The flow characteristics of the airflow inside the bag filter were obtained. The effect of airflow distribution of three optimized structures were compared with original structure. The results showed that the airflow in the hopper of the original structure formed an impinging jet. The maximum velocity was 8.3 m/s, and the minimum velocity was only 0.5 m/s, the relative root mean square velocity of the monitoring surface was 0.99. The velocity distribution on the corresponding monitoring surface was extremely uneven along the mainstream direction. The airflow uniformity inside the bag filter was improved in all three optimized structures, thus it was possible to improve the airflow uniform distribution by adding baffles. Considering the airflow uniform distribution inside the bag filter, adding vertical baffles was optimal, which can be improved by 41.41%. However the uniformity of the optimized structures with the third tilted baffle or the straight plate with a wing were not significantly improved compared to the addition of vertical baffles. Therefore when the hopper structure is optimized, the influence of the deflection of impinging jet on the airflow distribution inside the hopper can be neglected.