Knight G
Elliot Lake Laboratory, CANMET, Ontario, Canada.
Am Ind Hyg Assoc J. 1991 Apr;52(4):164-71. doi: 10.1080/15298669191364523.
The Elliot Lake Laboratory designs and uses impactor size selectors for respirable and other dust samplers both in the laboratory and in mines. Advantages of the selectors are compact size, reproducibility of size-selection performance based on the high precision of drill manufacture and use, flexibility in design and layout, and manufacturing ease in a machine shop. The major problems in design and performance were secondary deposition of dust and overloading with coarse dust. Secondary deposition modified the calculated size selection and either limited the spacing between adjacent orifices or orifices and other features or required a final calibration. Overloading of the coarse dust deposition zone led to changes in size-selection characteristics as the dust load increased, giving a definite limit to acceptable dust collection quantities. The use of multiple stages increased the coarse dust-holding capability manyfold. All the dust samplers developed at the Elliot Lake Laboratory used two or more successive stages to increase dust-holding capacity.
埃利奥特湖实验室在实验室和矿井中为可吸入粉尘及其他粉尘采样器设计并使用冲击式粒度分选器。这些分选器的优点包括尺寸紧凑、基于钻孔制造和使用的高精度实现粒度分选性能的可重复性、设计和布局的灵活性以及在机械车间易于制造。设计和性能方面的主要问题是粉尘的二次沉积和粗粉尘过载。二次沉积改变了计算出的粒度分选结果，要么限制了相邻孔口之间或孔口与其他部件之间的间距，要么需要进行最终校准。粗粉尘沉积区的过载会随着粉尘负荷的增加导致粒度分选特性发生变化，从而对可接受的粉尘收集量给出明确限制。多级使用使粗粉尘容纳能力提高了许多倍。埃利奥特湖实验室开发的所有粉尘采样器都采用两个或更多连续阶段来提高粉尘容纳能力。
