Effects of Spray Surfactant and Particle Charge on Respirable Coal Dust Capture.
Effects of Spray Surfactant and Particle Charge on Respirable Coal Dust Capture.
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DOI：
10.1016/j.shaw.2016.12.006
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发表时间：
2017-09
影响因子：
3.5
通讯作者：
Raynor PC
中科院分区：
文献类型：
--
作者：
Tessum MW;Raynor PC
含表面活性剂的水喷雾通常用于煤矿中以收集粉尘。本研究探讨了不同类型的表面活性剂对一系列煤尘粒径和电荷的除尘性能。在风洞中产生了烟煤粉尘气溶胶。气溶胶的电荷保持不变，用中和剂中和电荷，或者在颗粒被中和后使用扩散充电器带正电或负电。使用阴离子、阳离子或非离子表面活性剂喷雾或普通水喷雾从气流中除去颗粒。一些颗粒在通过喷雾段时被捕获，而剩余的颗粒使用静电分类器进行电荷分离。使用空气动力学粒度仪测量电荷分离颗粒的粒度和浓度。在喷雾开启和关闭的情况下进行测量，以计算总体收集效率（在所有电荷水平上积分）和具有特定电荷水平的颗粒的效率。测得煤尘气溶胶粒径为0.89 μ m ± 1.45 [几何平均值±几何标准差（SD）]。收集可吸入颗粒质量的总体效率为75.5 ± 5.9%（平均值± SD）。收集效率与粒径相关。表面活性剂的类型显着影响收集效率：带电粒子收集的非离子表面活性剂喷雾大于或等于收集其他喷雾，特别是弱带电气溶胶。颗粒电荷强度与收集效率显著相关。表面活性剂类型影响带电粒子喷雾收集效率。非离子表面活性剂喷雾在许多测试条件下都表现良好。
Surfactant-containing water sprays are commonly used in coal mines to collect dust. This study investigates the dust collection performance of different surfactant types for a range of coal dust particle sizes and charges. Bituminous coal dust aerosol was generated in a wind tunnel. The charge of the aerosol was either left unaltered, charge-neutralized with a neutralizer, or positively- or negatively-charged using a diffusion charger after the particles were neutralized. An anionic, cationic, or nonionic surfactant spray or a plain water spray was used to remove the particles from the air flow. Some particles were captured while passing through spray section, whereas remaining particles were charge-separated using an electrostatic classifier. Particle size and concentration of the charge-separated particles were measured using an aerodynamic particle sizer. Measurements were made with the spray on and off to calculate overall collection efficiencies (integrated across all charge levels) and efficiencies of particles with specific charge levels. The diameter of the tested coal dust aerosol was 0.89 μm ± 1.45 [geometric mean ± geometric standard deviations (SD)]. Respirable particle mass was collected with 75.5 ± 5.9% (mean ± SD) efficiency overall. Collection efficiency was correlated with particle size. Surfactant type significantly impacted collection efficiency: charged particle collection by nonionic surfactant sprays was greater than or equal to collection by other sprays, especially for weakly-charged aerosols. Particle charge strength was significantly correlated with collection efficiency. Surfactant type affects charged particle spray collection efficiency. Nonionic surfactant sprays performed well in coal dust capture in many of the tested conditions.
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影响因子：
4.5
作者：
DHARIWAL, V;HALL, PG;RAY, AK
通讯作者：
RAY, AK
影响因子：
4.5
作者：
Polat, M;Polat, H;Chander, S
通讯作者：
Chander, S
影响因子：
2.7
作者：
SCHEFFE, H
通讯作者：
SCHEFFE, H
DOI：
10.1080/15298668791384508
发表时间：
1987-02-01
期刊：
AMERICAN INDUSTRIAL HYGIENE ASSOCIATION JOURNAL
影响因子：
--
作者：
BURKHART, JE;MCCAWLEY, MA;WHEELER, RW
通讯作者：
WHEELER, RW
影响因子：
--
作者：
JOHNSTON, AM;VINCENT, JH;JONES, AD
通讯作者：
JONES, AD