Atomization characteristics of surfactant-containing solutions and enhanced removal of fine particulate matter

doi:10.16085/j.issn.1000-6613.2023-1685

Abstract

Abstract:

Spraying technology is widely used in the fields of gas purification, dust control and chemical synthesis. Among them, droplet size control and improvement of spray uniformity are the challenges of this technology. For this reason, this paper intends to use surfactants to regulate the atomization characteristics of water mist to improve spray uniformity and further explore its promotion effect on fine particle removal. In this paper, an experimental study was conducted to analyze the atomization characteristics of three surfactants (sodium dodecylbenzene sulfonate, cetyltrimethylammonium bromide, and Tween 80) solutions with different properties, and to investigate the effects of surfactant type and concentration on the atomization characteristics. The results showed that compared with deionized water, the addition of surfactants could significantly improve the spray uniformity, the overall particle size of the spray decreased, and the nonionic surfactant Tween 80 (TW80) atomized the highest percentage of small droplets formed. The number of droplets of the three types of surfactant solutions peaked when the surfactant solution concentration reached the critical micelle concentration (CMC), which was taken as the optimal atomization concentration. In addition, the fine particulate removal experiments by spraying showed that spraying with surfactant solutions could accelerate the removal rate of fine particulate.

Key words: spray, surfactant, fine particulate matter, droplet size

摘要：

喷雾技术在气体净化、粉尘控制、化学合成等领域应用广泛，其中液滴尺寸控制及提高喷雾均匀性是该技术面临的挑战。为此，本文拟利用表面活性剂对水雾的雾化特性进行调控，以提高喷雾均匀性，并进一步探究其对细颗粒物去除的促进作用。本文采用实验研究，首先对三种不同性质表面活性剂（十二烷基苯磺酸钠、十六烷基三甲基溴化铵、吐温80）溶液的雾化特性进行了分析，探究了表面活性剂的种类和浓度对于雾化特性的影响。结果表明，与去离子水相比，表面活性剂的加入可以显著提升喷雾的均匀性，喷雾总体粒径减小，并且非离子型表面活性剂吐温80雾化形成的小液滴数量占比最高。当表面活性剂溶液浓度达到临界胶束浓度（CMC）时，三种类型表面活性剂溶液的液滴数达到峰值，以此作为最佳雾化浓度。此外，通过喷雾去除细颗粒物实验表明，含表面活性剂溶液喷雾可以加快细颗粒物去除速率。

关键词: 喷雾, 表面活性剂, 细颗粒物, 液滴粒径

CLC Number:

X741

GU Hailin, CHEN Binkang, GUO Jiaqi, FENG Jie, JIAN Qingshan, WANG Jinqing, ZHANG Guangxue. Atomization characteristics of surfactant-containing solutions and enhanced removal of fine particulate matter[J]. Chemical Industry and Engineering Progress, 2024, 43(2): 865-871.

顾海林, 陈斌康, 郭佳琪, 冯洁, 简青山, 王进卿, 张光学. 含表面活性剂溶液的雾化特性及对细颗粒物的强化去除效果[J]. 化工进展, 2024, 43(2): 865-871.

Figures/Tables 8

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名称	简称	种类	分子式
十二烷基苯磺酸钠	SDBS	阴离子	C₁₈H₂₉SO₃Na
十六烷基三甲基溴化铵	CTAB	阳离子	C₁₉H₄₂BrN
吐温80	TW80	非离子	C₂₄H₄₄O₆

名称	简称	种类	分子式
十二烷基苯磺酸钠	SDBS	阴离子	C₁₈H₂₉SO₃Na
十六烷基三甲基溴化铵	CTAB	阳离子	C₁₉H₄₂BrN
吐温80	TW80	非离子	C₂₄H₄₄O₆

序号	质量分数/%	表面张力/mN·m^-1
序号	质量分数/%	SDBS	CTAB	TW80
1	0	71.90±0.01	71.90±0.01	71.90±0.01
2	0.005	32.27±0.05	20.01±0.03	43.49±0.04
3	0.01	30.78±0.04	19.88±0.04	40.74±0.05
4	0.05	30.37±0.05	29.95±0.07	40.99±0.06
5	0.10	29.75±0.05	30.65±0.04	40.15±0.03
6	0.15	30.70±0.06	30.80±0.04	40.30±0.04

序号	质量分数/%	表面张力/mN·m^-1
序号	质量分数/%	SDBS	CTAB	TW80
1	0	71.90±0.01	71.90±0.01	71.90±0.01
2	0.005	32.27±0.05	20.01±0.03	43.49±0.04
3	0.01	30.78±0.04	19.88±0.04	40.74±0.05
4	0.05	30.37±0.05	29.95±0.07	40.99±0.06
5	0.10	29.75±0.05	30.65±0.04	40.15±0.03
6	0.15	30.70±0.06	30.80±0.04	40.30±0.04

序号	质量分数/%	溶液黏度/mPa·s
序号	质量分数/%	SDBS	CTAB	TW80
1	0	0.91±0.01	0.91±0.01	0.91±0.01
2	0.005	1.17±0.02	0.96±0.02	0.93±0.02
3	0.01	0.91±0.01	0.92±0.01	0.91±0.01
4	0.05	0.94±0.02	0.92±0.01	0.93±0.02
5	0.10	0.94±0.02	0.94±0.02	0.93±0.02
6	0.15	0.96±0.03	0.93±0.01	0.93±0.01