Particle impactor assembly for size selective high volume air sa

Details Particle impactor assembly for size selective high volume air sa Particle impactor assembly for size selective high volume air sa

1987-03-23

1988-08-16

Hart, Charles

Gas separation

Means within gas stream for conducting concentrate to collector

55270, 55277, 55443, 73 28, B01D 5700

Patent

active

047641860

ABSTRACT:
Air containing entrained particulate matter is directed through a plurality of parallel, narrow, vertically oriented impactor slots of an inlet element toward an adjacently located, relatively large, dust impaction surface preferably covered with an adhesive material. The air flow turns over the impaction surface, leaving behind the relatively larger particles according to the human thoracic separation system and passes through two elongate exhaust apertures defining the outer bounds of the impaction collection surface to pass through divergent passages which slow down and distribute the air flow, with entrained smaller particles, over a fine filter element that separates the fine particles from the air. The elongate exhaust apertures defining the impaction collection surface are spaced apart by a distance greater than the lengths of elongate impactor slots in the inlet element and are oriented to be normal thereto. By appropriate selection of dimensions and the number of impactor slots air flow through the inlet element is provided a nonuniform velocity distribution with the lower velocities being obtained near the center of the impactor slots, in order to separate out particles larger than a certain predetermined size on the impaction collection surface. The impaction collection surface, even in a moderately sized apparatus, is thus relatively large and permits the prolonged sampling of air for periods extending to four weeks.

REFERENCES:
patent: 1767089 (1930-06-01), Miller et al.
patent: 3518815 (1970-07-01), McFarland et al.
patent: 3681973 (1972-08-01), Ludwig
patent: 4038057 (1977-07-01), Roth
patent: 4159196 (1979-06-01), Schneider et al.
patent: 4189937 (1980-02-01), Nelson
patent: 4211116 (1980-07-01), Pilat et al.
patent: 4274846 (1981-06-01), Smith
patent: 4321822 (1982-03-01), Marple et al.
patent: 4461183 (1984-07-01), Wedding
patent: 4557739 (1985-12-01), Fortman et al.
Langer, "Evaluation of PM-10 Commercial Inlets for New Surveillance Air Sampler", Semi-Annual Report, Published as Part of RFP 4036, Rocky Flats Plant, (07/85-12/85), Print Date: 5/87, Distribution Date: 6/87.

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