Particulate penetration of porous foam used as a low flow rate respirable dust size classifier.
Particulate penetration of porous foam used as a low flow rate respirable dust size classifier.
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多孔泡沫的颗粒渗透用作低流速可吸入粉尘尺寸分级器。
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
G. Deye
中科院分区：
文献类型：
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作者：
S. Page;J. Volkwein;P. Baron;G. Deye
多孔泡沫已被用作将颗粒物质分类成不同大小的组分的材料。在不同的流速、面速度和泡沫塞直径下，研究了名义上每英寸90个孔的多孔泡沫的渗透特性，并将其与以1.7 L/min运行的10 mm多尔奥利弗旋风的气溶胶渗透特性进行了比较。聚分散的三乙醇胺球通过多孔泡沫塞进行分类，并使用气动粒度仪确定其穿透度。结果表明，对于给定的桥塞直径，当面速度从26厘米/秒增加到39厘米/秒时，50%切割点从4.5微米减小到3.8微米。此外，当桥塞直径从4毫米增加到12毫米时，在相同的面速度下，50%的切割点与其他桥塞直径相似。与1.7 L/min的气旋穿透特性最匹配的是流速为250 ml/min时，通过直径为25 mm × 4 mm、每英寸90孔的泡沫。由于需要提供工人呼吸性粉尘暴露的短期或实时估计，多孔泡沫可能是一种可行的分类介质，用于煤矿工业中使用的低流量一次性呼吸性粉尘采样器。
Porous foam has been used as a material for classification of particulate matter into various size fractions. The penetration characteristics of a nominal 90 pores per inch porous foam were studied at various flow rates, face velocities, and foam plug diameters and compared to the aerosol penetration of a 10 mm Dorr Oliver cyclone operated at 1.7 L/min. Poly-dispersed triethanolamine spheres were classified through porous foam plugs and the resulting penetration was determined using an aerodynamic particle sizer. Results showed that for a given plug diameter, as face velocity increased from 26 to 39 cm/sec, the 50 percent cut point decreased from 4.5 to 3.8 microns. Furthermore, as the diameter of the plug increased from 4 to 12 mm, the 50 percent cut points were similar to other plug diameters at equivalent face velocities. The best match to the 1.7 L/min cyclone penetration characteristics occurred at a flow rate of 250 ml/min through a 25 mm by 4 mm diameter section of 90 pore per inch foam. Because of the need to provide short-term or real-time estimates of worker respirable dust exposure, porous foam may be a viable classification media for a low flow rate, disposable respirable dust sampler for use in the coal mining industry.