任 玲,袁 娜,林龙沅

（西南科技大学 环境与资源学院,四川 绵阳 621000）

DOI：10.13732/j.issn.1008-5548.2021.01.007

收稿日期：2020-07-12，修回日期：2020-09-27，在线出版时间：2020-11-02 10:30。

基金项目：四川省教育厅自然科学基金项目，编号：18ZA0498;四川省应用基础研究基金项目,编号:2018JY0438。

第一作者简介：任玲(1996—)，女，硕士研究生，研究方向为工业通风除尘。E-mail:1552967123@qq.com。

通信作者简介：林龙沅(1981—)，男，博士，副教授，硕士生导师,研究方向为气流粉碎、分级与除尘净化。E-mail:LLy7572@126.com。

摘要：首先采用纹影仪进行拍摄、观测不同喷吹压力下多孔喷吹气流的偏斜角度;然后在自制多孔喷吹实验台上设置不同喷吹压力和喷吹距离，分别测试3个滤筒侧壁上设置的18个测点处的压力峰值，最后通过对比分析探究喷吹压力和喷吹距离对多孔喷吹气流偏斜以及滤筒清灰性能的影响。实验结果表明:由纹影仪图像发现，喷吹气流偏斜角度沿着喷吹管方向逐渐减小，3个喷孔的气流偏斜角度随着喷吹压力增大而增大;随着喷吹压力增大，喷吹气流偏斜角度增大，迎流面与背流面压力峰值差距增大，作用在滤筒上的气流偏斜现象更加明显，滤筒整体的清灰均匀性降低，清灰性能变差;随着喷吹距离增大，3个滤筒侧壁各测点压力峰值整体呈现先增大再减小的规律，同一滤筒呈现侧壁压力峰值差距先减小、再增大的趋势;在喷吹距离为180 mm时两侧壁的测点压力峰值差值最小，滤筒清灰性能最佳。

关键词：多孔喷吹；气流偏斜；喷吹压力；喷吹距离；滤筒；清灰性能

Abstract：Firstly,a schlieren instrument was used to photograph and observe the deflection angle of porous jet under different jet pressure. Then,different jet pressure and jet distance were set to test the peak pressure at 18 measuring points set on the side wall of three filter cartridges on the self-made porous jet experimental platform. Lastly,the influence of jet pressure and jet distance on the deflection of porous jet airflow and cleaning performance of the filter cartridge were investigated by comparative analysis. The experimental results show that: it is found from schlieren image that the deflection angle of the jet airflow decreases along the direction of the jet pipe,and the airflow deflection angle of three holes increases with the increase of jet pressure. With the increase of the jet pressure,the angle of deflection of the jet airflow increases,the difference between the peak pressure of face flow surface and back flow surface increases,and the deflection of air flow acting on the filter cylinder becomes more obvious. The overall dust cleaning uniformity of the filter cylinder decreases and the dust cleaning performance becomes worse.With the increase of jet distance,the peak pressure of each measuring point on the side wall of the three filter cartridges increases at first and then decreases,and the difference of the peak pressure on the side wall of the same filter cartridge decreases firstly and then increases. When the jet distance is 180 mm,the pressure peak difference of the two sides of the filter cartridge is the smallest,and the cleaning performance of the filter cartridge is the best.

Keywords：porous jet; airflow deflection; jet pressure; jet distance; filter cartridge; cleaning performance

参考文献(References)：

[1]朱格.中国大气污染健康风险的驱动因素与城市特征研究[D].南京:南京大学,2019.

[2]YAN C P,ZHANG M X,LIN L Y,et al.An analysis of a reverse pulse cleaning process using high-flow pleated fabric filter cartridges[J].Process Safety and Environmental Protection,2018,113:264-274.

[3]LI S H,ZHOU F B,XIE B,et al.Influence of injection pipe characteristics on pulse-jet cleaning uniformity in a pleated cartridge filter[J].Powder Technology,2018,328:264-274.

[4]CHEN S W,CHEN D R.Annular-slit nozzles for reverse flow cleaning of pleated filter cartridges[J].Separation and Purification Technology,2017,177:182-191.

[5]杨燕霞,张明星,秦文茜,等.脉冲喷吹内置锥形滤筒的清灰性能[J].中国粉体技术,2019,25(1):76-80.

[6]秦文茜,张明星,康彦,等.脉冲喷吹金属滤袋的压力分布影响因素分析[J].环境工程学报,2020,14(2):465-472.

[7]张梅梅.滤筒褶皱数对脉冲滤筒除尘器性能影响的研究[D].绵阳:西南科技大学,2015.

[8]CHEN S W,WANG Q,CHEN D R.Effect of pleat shape on reverse pulsed-jet cleaning of filter cartridges[J].Powder Technology,2017,305:1-11.

[9]张明星,李倩倩,李雪,等.脉冲喷吹扁式方框滤筒除尘器的清灰性能[J].环境工程学报,2017,11(4):2377-2383.

[10]王岩,张明星,李倩倩,等.脉冲喷吹2 000 mm长滤筒的清灰性能[J].环境工程学报,2015,9(12):5951-5956.

[11]毕远霞,张留祥,钱云楼.喷嘴总面积与喷吹管截面积比对滤袋清灰性能的影响[J].环境工程学报,2017,11(7):4210-4216.

[12]QIAN Y L,CHEN H Y,DAI H D,et al.Experimental study of the nozzle settings on blow tube in a pulse-jet cartridge filter[J].Separation and Purification Technology,2018,191:244-249.

[13]YAN C P,LIU G J,CHEN H Y.Effect of induced airflow on the surface static pressure of pleated fabric filter cartridges during pulse jet cleaning[J].Powder Technology,2013,249:424-430.

[14]LI S H,WANG F,XIN J,et al,Study on effects of particle size and maximum pressure drop on the filtration and pulse-jet cleaning performance of pleated cartridge filter[J].Process Safety and Environmental Protection,2019,123:99-104.

[15]ANDERSEN B O,NIELSEN N F,WALTHER J H.Numerical and experimental study of pulse-jet cleaning in fabric filters[J].Powder Technology,2016,291:284-298.

[16]胡家雷.滤筒除尘器脉冲清灰系统的数值模拟研究[D].西安:西安建筑科技大学,2017.

[17]钟丽萍,党小庆,劳以诺,等.脉冲袋式除尘器喷吹管内压缩气流喷吹均匀性的数值模拟[J].环境工程学报,2016,10(5):2562-2566.

[18]刘侹楠,林龙沅,颜翠平,等.脉冲喷吹清灰过程的喷吹气流偏斜影响[J].中国粉体技术,2018,24(4):77-82.

[19]LI Q Q,ZHANG M X,QIAN Y L,et al.The relationship between peak pressure and residual dust of a pulse-jet cartridge filter[J].Powder Technology,2015,283:302-307.