矿用湿式除尘风机的流线型除雾器数值模拟研究

doi:10.11799/ce202211027

煤炭工程 ›› 2022, Vol. 54 ›› Issue (11): 150-156.doi: 10.11799/ce202211027

矿用湿式除尘风机的流线型除雾器数值模拟研究

杜靖永，高贵军，游青山，王唯博

1. 太原理工大学
2. 太原理工大学机械工程学院
3. 中煤科工集团重庆研究院有限公司

收稿日期:2022-03-31 修回日期:2022-05-01 出版日期:2022-11-15 发布日期:2023-03-09
通讯作者: 杜靖永 E-mail:949105838@qq.com

Numerical simulation study of streamlined mist eliminators for mining wet dust removal fan

Received:2022-03-31 Revised:2022-05-01 Online:2022-11-15 Published:2023-03-09

摘要/Abstract

摘要： 为探寻参数(转折角度、板间距、气流速度)对矿用湿式除尘风机所用流线型除雾器的除雾效率和压力损失的影响规律，采用Fluent软件对除雾器内的流动进行了三维数值模拟，通过引入评价参数来优化得出一种除雾效率高、能降低除尘风机功耗的除雾器结构。结果表明：随除雾器转折角度和板间距离减小，除雾效率和压力损失均呈现增加趋势。雾滴粒径大于10μm，除雾效率随气流速度增加而提高|雾滴粒径小于10μm，除雾效率随气流速度增大而下降。板间距从40mm减小到20mm，压力损失仅增加了15%左右|速度从2m/s增加到6m/s，压力损失增加约5倍，板间距对压力损失的影响程度明显低于速度对压力损失的影响。达到相同的除雾效率时，参数θ=90°、B=20mm的除雾器相对具有最佳性能，评价参数保持较低值，可减少除尘风机功耗。评价参数可在除尘风机功耗和除雾器结构设计之间建立关联，为除雾器优化设计提供了一种思路。

关键词: 流线型除雾器, 除雾效率, 压力损失, 评价参数, 除尘风机功耗

Abstract: In order to explore the influence of different combinations of parameters (turning angle, blade pitch and airflow velocity) on the mist removal efficiency and pressure loss of the streamlined mist eliminators used in the mining wet dust removal fan, the three-dimensional numerical simulation of the flow of the air containing droplets in the streamlined demister was carried out by using FLUENT software. By introducing evaluation parameters to optimize structural parameters, a demister structure with high mist removal efficiency and low power consumption of dust removal fan is obtained. The results show that: with the decrease of the turning angle of the demister and the blade pitch, the mist removal efficiency and the pressure loss show an increasing trend. When the droplet size is greater than 10 μm. the mist removal efficiency increases with the increase of airflow velocity; When the droplet size is less than 10 μm, the mist removal efficiency decreases with the increase of airflow velocity. When the blade pitch is reduced from 40 mm to 20 mm, the pressure loss increases by only about 15%; However, when the speed increases from 2m/s to 6m/s, the pressure loss increases by about 5 times. Therefore, the influence of blade pitch on pressure loss is significantly lower than that of velocity. When the mist eliminator has the same mist removal efficiency, the mist eliminator with the parameters θ=90° and B=20 mm has the best performance. At this time, the evaluation parameters of the demister remain low, which can reduce the power consumption of the dust removal fan. The evaluation parameter relates the power consumption of the dust removal fan to the structural design of the mist eliminator, and provide an idea for the multi-parameter combination optimization design of the mist eliminator.

中图分类号:

TD714

杜靖永, 高贵军, 游青山, 王唯博. 矿用湿式除尘风机的流线型除雾器数值模拟研究[J]. 煤炭工程, 2022, 54(11): 150-156.

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矿用湿式除尘风机的流线型除雾器数值模拟研究

Numerical simulation study of streamlined mist eliminators for mining wet dust removal fan

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