基于文丘里导流管的滤筒喷吹性能优化及影响因素分析

赵志宏; 邵联敏; 郑培琦; 党小庆; 王赫; 吉硕

doi:10.13205/j.hjgc.202505011

基于文丘里导流管的滤筒喷吹性能优化及影响因素分析

doi: 10.13205/j.hjgc.202505011

1. 西安建筑科技大学环境与市政工程学院陕西省环境工程重点实验室, 西安 710055;
2. 浙江鸿盛环保科技集团有限公司, 浙江衢州 324000

基金项目:

陕西省重点研发计划（2024SF-YBXM-569）

详细信息

作者简介:
赵志宏（1998—），男，硕士研究生，主要研究方向为大气污染控制工程。2362509595@qq.com

通讯作者:
党小庆（1964—），男，教授，主要研究方向为大气污染控制工程。dangxq@163.com

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出版历程
- 收稿日期: 2024-01-06
- 录用日期: 2024-05-27
- 修回日期: 2024-05-04
- 网络出版日期: 2025-09-11

Optimization of pulse-jet cleaning performance and influencing factor analysis for filter cartridges with a Venturi diversion tube

1. Key Laboratory of Environmental Engineering of Shaanxi Province, School of Environment & Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an 710055, China;
2. Zhejiang Hongsheng Environmental Protection Technology Group Co., Ltd., Quzhou 324000, China

摘要

摘要: 常规滤筒长度以660，1000 mm为主，虽然延长滤筒长度能增大过滤面积，降低过滤风速，但也可能引发压缩空气量或压力不足，导致喷吹气流难以抵达滤筒底部进行有效清灰的问题。针对上述问题，以3 m滤筒为研究对象，建立滤筒三维模型，利用数值模拟分析方法对滤筒的喷吹清灰过程进行试验研究。在验证数值模拟分析方法的精确性与可靠性的基础上，设计了一种文丘里式导流管以提高滤筒的清灰性能。在此基础上进行了L16（4⁵）的正交试验，确定3 m滤筒最佳喷吹清灰参数范围。结果表明：3 m滤筒在距袋口1.5 m处时发生径向压力衰减的现象，滤筒中下部位置波峰至波谷间压力分布不均匀。增设文丘里式导流管后的滤筒诱导气流量是无文丘里式导流管滤筒的1.47倍，壁面峰值压力与最大反向加速度增加的倍数为0.1~0.5倍，证明了增设文丘里式导流管可以通过增加诱导气流量提高壁面峰值压力。正交试验结果表明：滤筒壁面峰值压力随着喷吹压力和喷嘴直径的增大而增大、滤筒长度的增加而减小；最佳喷吹时间为100 ms；喷吹过程中存在1个最佳喷吹距离，即与喷嘴直径成10倍正比例关系。建议在无文丘里导流管的情况下，喷吹压力为0.5 MPa；在增设文丘里式导流管的情况下，喷吹压力为0.3~0.4 MPa、喷嘴直径为22 mm、喷吹距离为220 mm。该研究成果可为滤筒喷吹参数设计及应用提供指导。
- 滤筒 /
- 脉冲清灰 /
- 文丘里 /
- 数值模拟 /
- 正交试验
Abstract: The filter cartridge is a filter unit made by repeatedly folding the filter material into folds. Compared with traditional round bags and folded filter bags with the same size， it offers a larger filtration area while occupying less space， and has the advantages such as simple maintenance and management， low resistance， and high efficiency， etc. These features make it widely applied in the dust-containing gas filtration system where air serves as the medium. In the purification of dust-containing gas discharged from industrial kilns， most dust collectors are used in high-temperature environments， and the filter cartridge is susceptible to the influence of the depth and spacing of the fold， resulting in problems such as compaction， bagging， and dust accumulation. These problems reduce the effective filteration area of the filter cartridges， and increase the operating resistance of the system. In addition， they accelerate wear and corrosion of the filter material caused by dust， ultimately shortening the service life of the filter cartridge.The standard lengths of conventional filter cartridges typically encompass 660 mm and 1000 mm. While elongating the length of the filter cartridge enhances the filtration area and subsequently diminishes the filtration wind velocity， it might also compromise the compressed air volume or pressure， thereby impeding the sprayed airflow's capacity to penetrate the cartridge's depths for effective dust removal. To address these concerns， the present study focused on a 3 m filter cartridge， constructing a three-dimensional model of the same and employing numerical simulation analysis techniques to meticulously investigate the spraying and cleaning mechanisms of the cartridge. Upon validating the precision and credibility of these numerical simulation methods， a Venturi-style guide pipe was devised to optimize the cleaning performance of the filter cartridge. The L16（4⁵） orthogonal test was carried out to determine the optimal range of blowing parameters for 3 m cartridges. The results showed that the radial pressure decay phenomenon occurred when the 3 m cartridge was 1.5 m away from the mouth of the bag， and the pressure distribution between the peak and trough in the middle and lower sections of the cartridge was non-uniform. The induced gas flow rate of the cartridge after the addition of a Venturi deflector was 1.47 times of that of the cartridge without a Venturi deflector， and the peak wall pressure and maximum reverse acceleration rose by 0.1 to 0.5 times， demonstrating that the addition of a Venturi deflector improved the peak wall pressure by increasing the induced gas flow rate. The results of the orthogonal tests showed that the peak wall pressure of the cartridge increased with the increase of blowing pressure and nozzle diameter but decreased with the increase of cartridge length； the optimal blowing time was 100 ms； there was an optimal blowing distance in the process of blowing， i.e.， it was 10 times the nozzle diameter. It is suggested that the blowing pressure should be 0.5 MPa without a Venturi deflector， while with a Venturi deflector， the blowing pressure should be 0.3 MPa to 0.4 MPa， the nozzle diameter should be 22 mm， and the blowing distance should be 220 mm.The research results can serve as a guideline for the design of cartridge blowing parameters and application.
- filter cartridge /
- pulse-jet cleaning /
- Venturi /
- numerical simulation /
- orthogonal test

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