鲁进利^1a，何 杰^1a，庄乾双²，钱付平^1b，王 佳^1a

(1. 安徽工业大学 a. 建筑工程学院; b. 能源与环境学院, 安徽 马鞍山 243032；2. 苏州恒清环保科技有限公司, 江苏 苏州 215600)

DOI:10.13732/j.issn.1008-5548.2022.03.008

收稿日期： 2021-11-10， 修回日期：2022-03-08，在线出版时间：2022-05-05。

基金项目：国家自然科学基金项目，编号：51306002；安徽省自然科学基金项目，编号：1508085QE95。

第一作者简介：鲁进利(1982—)，男，副教授，博士，研究方向为工程热物理。E-mail: lujinli@sina.cn。

摘要：为了研究过滤阻力对除尘器过滤性能的影响，建立基于CFD的标准k-ε湍流模型和多孔跳跃模型，对褶数为8和10的2种除尘器滤袋在不同入口风速时沿轴向过滤压降分布进行数值模拟。模拟出一种新型组合式双褶数滤袋，采用不均匀度和相对标准差分析双褶数滤袋与常规褶式滤袋的压降分布不均匀性。结果表明：褶式滤袋沿轴向上的压降分布呈非均匀现象，从袋底到袋口呈梯次变化，靠近袋口位置的压降较大；压降的不均匀性随着入口风速的增大而更加明显。增加滤袋的上半部褶数从而增大相应的过滤面积，使气流流量分布均匀，可使顶部的压降有效降低11.2%～15.4%;双褶数滤袋的压降分布相对较均匀，除尘器进出口过滤压降最大可降低13.5%,有效降低除尘器的运行能耗。

关键词：双褶数滤袋；压降；不均匀度；相对标准差；数值模拟

Abstract：In order to study the influence of filter resistance on filter performance of dust collector, based on CFD standard k-ε turbulence model and porous jump model, a numerical simulation study was carried out on the axial filtration pressure drop distribution of two filter bags with 8 and 10 pleats at different inlet wind speeds. A new type of combined double pleated filter bag was proposed, and unevenness and relative standard deviation were used to analyze the uneven distribution of pressure drop between the double pleated filter bag and the conventional pleated filter bag. The results show that the pressure drop distribution of the pleated filter bag along axial direction is non-uniform, and it changes in steps from the bottom of bag to the bag mouth Pressure drop near the bag mouth is larger and the unevenness of the pressure drop varies with the inlet wind speed increase and become more obvious. It is concluded that increasing the number of pleats in the upper half increases the corresponding filter area, makes the air flow evenly distributed, and effectively reduces the pressure drop at the top by 11.2%～15.4%. The pressure drop distribution of the double pleated filter bag is relatively uniform, and the filter pressure drop at the inlet and outlet of the dust collector can be reduced by up to 13.5%, effectively reducing the energy consumption of the dust collector.

Keywords：double pleated filter bag; pressure drop; unevenness; relative standard deviation; numerical simulation

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