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过程工程学报 ›› 2021, Vol. 21 ›› Issue (5): 516-529.DOI: 10.12034/j.issn.1009-606X.220126

• 流动与传递 • 上一篇    下一篇

新型结构微孔膜滤板清灰性能的数值模拟

刘 哲, 陈路敏, 钱付平*, 叶蒙蒙, 魏 民, 韩云龙, 鲁进利   

  1. 安徽工业大学建筑工程学院,安徽 马鞍山 243002
  • 收稿日期:2020-04-10 修回日期:2020-06-10 出版日期:2021-05-22 发布日期:2021-06-01
  • 通讯作者: 钱付平 fpingqian@163.com
  • 基金资助:
    安徽省科技重大专项

Numerical simulation of dust-cleaning performance of new structure microporous membrane filter plate

Zhe LIU, Lumin CHEN, Fuping QIAN*, Mengmeng YE, Min WEI, Yunlong HAN, Jinli LU   

  1. School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, Anhui 243002, China
  • Received:2020-04-10 Revised:2020-06-10 Online:2021-05-22 Published:2021-06-01
  • Contact: QIAN Fu-Ping fpingqian@163.com

摘要: 为探究不同影响因素对旋转脉冲清灰微孔膜除尘器所使用的新型结构微孔膜滤板清灰性能的影响,采用CFD方法对其脉冲清灰流场进行了数值模拟,通过与文献实验数据比较,验证了数值计算模型的准确性,考察了喷吹压力、喷吹高度、喷吹管末端与入口端直径比、喷孔直径及滤板长度对新型结构微孔膜滤板壁面平均峰值压力的影响,并对滤板侧壁压力分布随喷吹时间变化的规律进行了研究。设计了五因素三水平正交试验,以滤板平均峰值压力为设计指标,分析获得最佳的清灰系统参数。结果表明,增大喷吹压力、喷孔直径及减小喷吹管末端与入口端直径比均可以提高滤板壁面平均峰值压力,有利于提高新型结构微孔膜滤板的清灰性能;喷吹高度对滤板壁面平均峰值压力的影响较小,但提高喷吹高度可有效减小滤板顶部的负压,顶部负压减小有利于提高微孔膜滤板的使用寿命;滤板侧壁压力会随喷吹时间变化而不断变化,使不同时刻下滤板侧壁的压力分布不同;滤板长度逐渐增加会对新型结构微孔膜滤板中下部的清灰效果产生不利影响。

关键词: 新型结构微孔膜滤板, 脉冲清灰, 清灰性能, 数值模拟

Abstract: In order to explore the influence of different factors on the dust-cleaning performance of the new structure microporous membrane filter plate used in the rotary pulse-jet cleaning microporous membrane dust collector, the CFD method was used to simulate the flow field of pulse-jet cleaning, and the accuracy of the numerical calculation model was verified by comparing with the experimental data in the literature. On this basis, the influence of pulse-jet pressure, pulse-jet distance, diameter ratio of the end to the inlet of the injection pipe, nozzle diameter, and length of filter plate on the average peak pressure of the wall surface of the new structure filter plate were studied, and the law of the change of the side pressure of filter plate with the pulse-jet time was explored. At the same time, a five-factor three-level orthogonal test was designed, and the average peak pressure of the filter plate was used as the design index to analyze and obtain the best pulse-jet cleaning system parameters. The results showed that the average peak pressure of the filter plate can be increased by increasing the pulse-jet pressure, the nozzle diameter and reducing the diameter ratio of the end to the inlet of the injection pipe, which was beneficial to improve the dust-cleaning performance of the new structure microporous membrane filter plate. The pulse-jet distance had little effect on the average peak pressure of the filter plate wall, but increasing the pulse-jet distance can effectively reduce the size of the negative pressure at the top of the filter plate, the reduction of the negative pressure on the top of the filter plate was beneficial to increase the service life of the microporous membrane filter plate. The side pressure of the filter plate changed with the pulse-jet time, making the filter plate at different times. The pressure distribution of the side wall was different. With the increase of the length of the filter plate, it had a negative impact on the dust-cleaning effect of the middle and lower part of the new structure microporous membrane filter plate.

Key words: new structure microporous membrane filter plate, pulse-jet cleaning, dust-clean performance, numerical simulation