Gas separation: apparatus – Electric field separation apparatus – Electrode cleaner – apparatus part flusher – discharger – or...
Patent
1997-01-31
1999-01-05
Chiesa, Richard L.
Gas separation: apparatus
Electric field separation apparatus
Electrode cleaner, apparatus part flusher, discharger, or...
95 60, 95 75, 96 50, 96 63, 96 64, 96228, 96372, B03C 378
Patent
active
058556524
ABSTRACT:
Apparatus is disclosed for rapidly collecting aerosols containing solid particles and micro organisms, such as viruses and bacteria, from relatively large volumes of air and concentrating these particulates as samples in water. This apparatus operates under conditions conducive to preserving the integrity and viability of the collected micro organisms. Ambient air containing aerosols drawn into and through the collector's interior by an air mover, is mixed with very warm air saturated with moisture and then with cold air, to cause the resulting vapor mixture to become supersaturated. This supersaturated water vapor rapidly condenses onto the incoming aerosol particles to form droplets with particles at their centers. The airstream carrying these droplets enters a cloud of air ions produced by a corona generator or, alternately, by a radioactive source emitting alpha particles. The air ions transfer their charges to the droplets which are then attracted from the airstream to temporarily adhere to the collector screens which may carry a charge of polarity opposite of that imparted on the droplets or be grounded. The airstream then continues through the system and is vented. The particles collected on the screens are continuously or periodically washed off by a low volume flow or spray of water. The resulting highly concentrated particle suspension passes through a funnel and a peristaltic pump to an output port to yield time-sequential aliquots for external analysis. Using a multi-stage filtration and back flush process, additional particle size classification within aliquots is possible before analysis.
REFERENCES:
patent: 2607438 (1952-08-01), Bailey
patent: 2672946 (1954-03-01), Rabkin et al.
patent: 3236045 (1966-02-01), Berger et al.
patent: 3600817 (1971-08-01), Klein
patent: 3958958 (1976-05-01), Klugman et al.
patent: 3960505 (1976-06-01), Marks
patent: 4222748 (1980-09-01), Argo et al.
patent: 4256468 (1981-03-01), Mazer et al.
patent: 5389120 (1995-02-01), Sewell et al.
Brian Cage, Keith Schreiber, Charles Barnes, and Jay Portnoy, "Evaluation of Four Bioaerosol Samplers in the Outdoor Environment," Annals of Allergy, 1995 (in press).
M.A. Chatigny, "Sampling Airborne Microorganisms," in Air Sampling Instruments, 5.sup.th ed., (1978), American Conference of Government Ind. Hygienists, Cincinnati, OH, pp. E-1 to E-9.
A.A. Anderson, "New Sampler for the Collection, Sizing, and Enumeration of Viable Airborne Particles", Journal of Bacteriology, 76, 1958, pp. 471 to 484.
Andersen Microbial Air Samplers, Graseby Andersen, Smyrna, GA, Jan. 1994.
P.S. Brachman, et al., Science, 144, 1964, p. 1295.
Ace Glass, Inc., Vineland, NJ, General Price List, Jan. 1, 1995.
G.S. Rajhans, "Inertial, Gravitational and Diffusional Collectors," in Air Sampling Instruments, 5.sup.th ed., (1978), American Conference of Government Ind. Hygienists, Cincinnati, OH, pp. 0-1 to 0-51.
G.S. Rajhams, "Inertial and Gravitational Collectors," in Air Sampling Instruments, 6.sup.th ed., (1983), American Conference of Government Ind. Hygienists, Cincinnati, OH, pp. Q-1 to Q-40.
V.C. Furtado, "Air Movers and Samplers," in Air Sampling Instruments, 6.sup.th ed.., (1983) American Conference of Government Ind. Hygienists, Cincinnati, OH, pp. M1 to M-23.
D. L. Swift and M. Lippmann, "Electrostatic and Thermal Precipitators," in Air Sampling Instruments, 6.sup.th ed., (1983), American Conference of Government Ind. Hygienists, Cincinnati, OH, pp. R-1 to R-15.
E.L. Shipe, M.E. Tyler and D.N. Chapman, Appl. Microbiology, 7, 1959, pp. 349 to 354.
C.S. Cox, The Aerobiological Pathway of Microorganisms, John Wiley & Sons, Chichester, UK, 1987.
G.S. Rajhans, op. cit., 1978.
C.S. Cox, op. cit., 1987.
F. Errington and E.O. Powell, J. Hyg., 67, 1969, pp. 387 to 399.
A. Ogawa, Separation of Particles from Air and Gases, vol. 11, CRC Press, Boca Raton, FL, 1984, pp. 1 to 49.
G.F. Leal Fereira, O.N. Oliveira, Jr., and J.A. Giacometti, J. Appl. Phys, 59,(9), 1986, pp. 3045-3049.
A. Ogawa, op. cit., 1984.
D.L. Swift and M. Lippmann, op. cit., 1983.
D.L. Swift and M. Lippmann, ibid, 1983.
Chiesa Richard L.
Lukacher M.
Topaz 2000, Inc.
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