Record Display for the EPA National Library Catalog

RECORD NUMBER: 24 OF 57

OLS Field Name OLS Field Data
Main Title Five-Stage Cyclone System for in Situ Sampling.
Author Smith, Wallace B. ; Wilson, Jr., Rufus R. ; Harris, D. Bruce ;
CORP Author Southern Research Inst., Birmingham, AL.;Industrial Environmental Research Lab., Research Triangle Park, NC.
Year Published 1979
Report Number EPA-68-02-2131; EPA-600/J-79-116 ; IERL-RTP-P-233
Stock Number PB81-129520
Additional Subjects Cyclone separators ; Air pollution ; Aerosols ; Sampling ; Particles ; Viscosity ; Density(Mass/volume) ; Concentration(Composition) ; Design criteria ; Performance evaluation ;
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB81-129520 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 8p
Abstract
The paper describes the development and calibration of a five-stage cyclone system for in situ sampling of process streams. Cyclones may be used to advantage for collecting large samples and in sampling aerosols of high particulate concentration. At 25C, 28.3 L/min, and for a particle density of 1,0 g/cu cm, the D50 cut points of the cyclone system were 5.4, 2.1, 1.4, 0.65, and 0.32 micrometers for cyclones I-V, respectively. Results from calibrating the cyclones at several flow rates, temperatures, and particle densities suggest that the D50 cut points are: (1) proportional to the flow rate of the gas raised to an exponent between -0.63 and -1.11, (2) linearly proportional to the viscosity of the gas, and (3) proportional to the reciprocal of the square root of the particle density. (Copyright (c) 1979 American Chemical Society.)