粉塵分粒裝置採樣器之性能評估研究

Evaluation of Size--Selective Dust Samplers

在市面上常用的可呼吸性個人粉塵採樣器有10mm尼龍旋風器及SKC旋風器兩種。目前ACGIH已訂出一個新的可呼吸性粉塵之採樣校率規範，將採樣器的截取直徑統一訂在4.0μm空氣動力直徑之上，來取代舊有ACGIH及BMRC之規範。本研究擬找出上述兩種採樣器之操作條件，以符合新的ACGIH規範。本實驗結果顯示，10mm尼龍旋風器在1.3L/min，SKC旋風器在2.2L/min時，兩種採樣器的收集效率均可以符合新的ACGIH規範。本文亦探討採樣泵之脈動，微粒的種類，以採樣器的方位對收集效率的影響。

The 10 mm nylon and SKC cyclones are the two commonly used respirable personal dust samplers. Currently, the US ACGIH has recommended a new criteria for repirable dust sampling, which specifies an universal aerodynamic cut-off diameter to be 4.0 μm. The new ACGIH criteria is intended to replace the old ACGIH and BMRC criteria. This study is to find the new operating conditions for the two samplers to meet the new criteria. The experimental results indicate that at the flow rate of 1.3L/min for 10 mm nylon cyclone and 2.2L/min for SKC cyclone, the collection efficiency curves of the two samplers can meet the new ACGIH criteria. This paper also discusses the effect of pump pulsation, particle materials and sampler orientation on the collection efficiency curve.