Multi-stage impactor
The invention relates to a dust-measuring instrument for measuring and classifying dust fractions of a grain size of less than 100 mu m, which instrument consists essentially of a closed vessel having series-arranged stages of nozzle rings and precipitation surfaces downstream of the nozzle rings an...
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| Format: | Patent |
| Sprache: | eng ; ger |
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| Zusammenfassung: | The invention relates to a dust-measuring instrument for measuring and classifying dust fractions of a grain size of less than 100 mu m, which instrument consists essentially of a closed vessel having series-arranged stages of nozzle rings and precipitation surfaces downstream of the nozzle rings and also an inflow opening and outflow opening, the nozzle rings (19, 22, 26, 30, 34) being formed like pipe stubs of different diameters and telescopically arranged transversely to the inflow and outflow opening (4, 5) in the vessel (1), and some of the nozzle rings (22, 26, 30, 34), provided with nozzles (20, 24, 27, 31, 35) which decrease in size from the outside inwards, being designed as precipitation surfaces (25, 29, 33, 37). |
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