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过程工程学报 ›› 2022, Vol. 22 ›› Issue (11): 1558-1564.DOI: 10.12034/j.issn.1009-606X.221410CSTR: 32067.14.jproeng.221410

• 研究论文 • 上一篇    下一篇

表面活性剂协同作用下湿式过滤除尘实验研究

丁厚成， 徐远迪*， 邓权龙， 葛梦圆， 刘亚凯， 许媛媛
  

  1. 安徽工业大学建筑工程学院，安徽 马鞍山 243032
  • 收稿日期:2021-12-09 修回日期:2022-01-12 出版日期:2022-11-28 发布日期:2022-11-28
  • 通讯作者: 徐远迪 xuyuandi421@163.com
  • 作者简介:丁厚成(1973-)，男，安徽省来安县人，博士，副教授，主要从事工业通风与除尘方面研究，E-mail: hnhoucheng@163.com；通讯联系人，徐远迪，E-mail: xuyuandi421@163.com.
  • 基金资助:
    安徽省自然科学基金;大学生创新创业计划;大学生创新创业计划;大学生创新创业计划

Experimental study on removel of dust by wet filtration under synergistic effect of surfactant

Houcheng DING,  Yuandi XU*,  Quanlong DENG,  Mengyuan GE,  Yakai LIU,  Yuanyuan XU   

  1. School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, Anhui 243032, China
  • Received:2021-12-09 Revised:2022-01-12 Online:2022-11-28 Published:2022-11-28

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摘要： 选取无烟煤粉为对象，对表面活性剂的相关性能以及无烟煤粉的润湿性进行研究，在此基础上设计并搭建了湿式纤维栅除尘系统，研究不同风速、喷雾压力、纤维栅目数以及复配表面活性剂的种类对除尘效率的影响。实验结果表明，表面活性剂可以有效降低水的表面张力，使得煤粉更容易被湿润；在除尘系统还未添加表面活性剂时，干式纤维栅对粉尘的单一过滤效率较低；添加喷雾装置后，除尘效率随喷雾压力的增大先提高，后趋于稳定，且总体效率均明显高于单一纤维栅除尘条件下的效率；纤维栅目数和除尘效率呈正相关，而当风速大于0.7 m/s后，由于纤维网上形成的水膜较多，会对风速产生一定的阻力，此时，风速对除尘效率的变化影响不明显；添加表面活性剂之后，发现LAB-35和X-100混合表面活性剂溶液的除尘效率最高，达到97.03%。

关键词: 湿式纤维栅, 无烟煤, 表面活性剂, 除尘效率

Abstract: In this study, anthracite powder was selected as the object to study the related properties of surfactants and the wettability of anthracite powder. On this basis, a wet fiber grating dust removal system was designed and built to study the effects of different wind speeds, water pressures, fiber grating mesh numbers and the types of compound surfactants on dust removal efficiency. The experimental results show that the surfactant can effectively reduce the surface tension of water, making the coal powder more easily wetted. When the dust removal system has not added surfactant, the single filtration efficiency of dry fiber grid to dust is low. After adding the spray device, the dust removal efficiency increases first and then tends to be stable with the increase of spray pressure, and the overall efficiency is significantly higher than that under the condition of single fiber grid dust removal. However, too high speed and too small droplet size are easier to pass through the fiber grating and reduce the water volume on the fiber grating, which is not conducive to the formation of water film between fibers, thus affecting the improvement of dust removal efficiency. The number of fiber grids is positively correlated with the dust removal efficiency, and when the wind speed is greater than 0.7 m/s, due to the formation of more water film on the fiber network, there will be certain resistance to the wind speed. At this time, the wind speed has no obvious effect on the change of dust removal efficiency. After adding surfactants, the dedusting efficiency of the system is significantly improved. By comparing the dedusting efficiency of several complex solutions, it is found that LAB-35+X-100 surfactant complex solution have the highest dedusting efficiency, which can reach 97.03%. Moreover, the growth rate of dedusting efficiency is relatively stable with the change of water pressure. It can be seen that this complex solution had good dust removal effect. In terms of economy, the CMC of X-100 and LAB-35 solutions are 0.07wt% and 0.5wt%, which are easy to reach saturation and simple to be configured. Therefore, they can be considered to be used in industrial dust removal in the future.

Key words: Anthracite powder, Wet fiber grid, Surfactant, Dust removal efficiency