非均匀渗透率对滤袋表面过滤风速分布的影响研究

doi:10.16265/j.cnki.issn1003-3033.2025.07.1188

中国安全科学学报 ›› 2025, Vol. 35 ›› Issue (7): 91-97.doi: 10.16265/j.cnki.issn1003-3033.2025.07.1188

非均匀渗透率对滤袋表面过滤风速分布的影响研究

杨宏刚¹^,²^,³(), 李奥²^,³, 曹莹雪¹^,²^,³, 孟晓静¹^,²^,³, 王金宵²^,³

¹ 绿色建筑全国重点实验室/西安建筑科技大学, 陕西西安 710055
² 西安建筑科技大学资源工程学院, 陕西西安 710055
³ 西安市工业职业危害评价与防治技术重点实验室, 陕西西安 710055

收稿日期:2025-02-10 修回日期:2025-04-20 出版日期:2025-07-28
作者简介:

杨宏刚 (1981—),男,陕西岐山人,博士,副教授,主要从事职业危害(粉尘)防治理论与技术研究。E-mail: yanghonggang@xauat.edu.cn。
曹莹雪副教授
孟晓静教授
基金资助:
绿色建筑全国重点实验室自主研究课题基金资助(LSZZ-Y202418)

Study on influence of non-uniform permeability on filtration velocity distribution of filter bag surface

YANG Honggang¹^,²^,³(), LI Ao²^,³, CAO Yingxue¹^,²^,³, MENG Xiaojing¹^,²^,³, WANG Jinxiao²^,³

¹ State Key Laboratory of Green Building, Xi'an University of Architecture & Technology, Xi'an Shaanxi 710055, China
² School of Resource Engineering, Xi'an University of Architecture and Technology, Xi'an Shaanxi 710055, China
³ Xi'an Key Laboratory of Occupational Hazard Assessment and Prevention Technology, Xi'an Shaanxi 710055, China

Received:2025-02-10 Revised:2025-04-20 Published:2025-07-28

摘要/Abstract

摘要： 为解决袋式除尘器滤袋表面过滤风速分布不均匀的问题,提出一种新的非均匀渗透率滤袋设计方法,利用Fluent软件和用户自定义函数(UDF),模拟在设计过滤风速(1.0 m/min)条件下,非均匀渗透率对滤袋表面过滤风速分布的影响。结果表明:均匀渗透率滤袋的过滤风速沿滤袋轴向自底部向上逐渐增加,且过滤风速分布均匀性随滤袋长度的增加而降低;通过优化长度为5、7、10 m 等3种不同滤袋的渗透率,滤袋表面过滤风速的最大值分别从1.60、2.32和3.34 m/min降至1.30、1.31和1.38 m/min,并显著提升了滤袋表面过滤风速分布的均匀性指数,且指数分别从0.736、0.459、0.210提升至0.854、0.868、0.892。

关键词: 袋式除尘器, 滤袋表面, 过滤风速, 非均匀渗透率, 均匀性指数

Abstract:

In order to address the issue of uneven filtration velocity distribution on the filter bag surface in a baghouse dust collector, a new design method for filter bags with non-uniform permeability was proposed. Using Fluent software and User-Defined Function (UDF), the impact of non-uniform permeability on the filtration velocity distribution across the bag surface was simulated under the design filtration velocity condition (1.0 m/min). The results indicate that the filtration velocity of uniformly permeable filter bags gradually increases along the axis of the bag from bottom to top, and the uniformity of filtration velocity distribution decreases with the increase in bag length. By optimizing the permeability of filter bags with different lengths of 5, 7 and 10 m, the maximum filtration velocity on the surface of filter bags is reduced from 1.60, 2.32 and 3.34 m/min to 1.30, 1.31 and 1.38 m/min, respectively. Moreover, the uniformity index of filtration velocity distribution on the surface of the filter bag is significantly improved, from 0.736, 0.459, 0.210 to 0.854, 0.868, 0.892, respectively.

Key words: baghouse dust collector, filter bag surface, filtration velocity, non-uniform permeability, uniformity index

中图分类号:

X964工业防尘

杨宏刚, 李奥, 曹莹雪, 孟晓静, 王金宵. 非均匀渗透率对滤袋表面过滤风速分布的影响研究[J]. 中国安全科学学报, 2025, 35(7): 91-97.

YANG Honggang, LI Ao, CAO Yingxue, MENG Xiaojing, WANG Jinxiao. Study on influence of non-uniform permeability on filtration velocity distribution of filter bag surface[J]. China Safety Science Journal, 2025, 35(7): 91-97.

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工况	3 m(Case1)		10 m(Case3)		12 m(Case5)		15 m(Case7)
来源	PARK等^[8]	本文	PARK等^[8]	本文	PARK等^[8]	本文	PARK等^[8]	本文
试验值/Pa	24.0	—	90.0	—	140.0	—	150.0	—
模拟值/Pa	22.3	22.9	83.7	94.6	147.5	138.1	162.0	164.7
相对误差/%	7.08	4.58	7.00	5.11	5.36	1.36	8.00	9.80

工况序号	L/m	v₀/ (m·min^-1)	过滤面积/ m²	过滤风量/ (m³·s^-1)	入口速度/ (m·s^-1)	α/m²
1	5	1	2.45	0.040 8	0.13	4.30×10^-11
2	5	1	2.45	0.040 8	0.13	式(9)
3	7	1	3.43	0.057 2	0.18	4.30×10^-11
4	7	1	3.43	0.057 2	0.18	式(10)
5	10	1	4.90	0.081 6	0.26	4.30×10^-11
6	10	1	4.90	0.081 6	0.26	式(11)

非均匀渗透率对滤袋表面过滤风速分布的影响研究

Study on influence of non-uniform permeability on filtration velocity distribution of filter bag surface

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L/ m	未调整α前的φ	调整α 后的φ	φ变化率/%
5	0.736	0.854	16.0
7	0.459	0.868	89.1
10	0.210	0.892	324.8