Electric heating – Metal heating – By arc
Patent
1997-09-17
1999-06-01
Paschall, Mark
Electric heating
Metal heating
By arc
21912151, 21912136, 21912148, 31511151, B23K 1000
Patent
active
059085665
ABSTRACT:
A plasma torch for reliable analysis of airborne particulate matter permits real-time monitoring of airborne metal pollutants in flue gases from furnaces and incinerators. The torch injects sample air into argon plasma and has an outer tube to confine plasma gas for generating a plasma fireball. An intermediate tube has an outwardly flared portion concentrically disposed within the outer tube to form an outer annulus for feeding plasma gas to the fireball. The intermediate tube also has an injector sheath tube joined at its base to the base of the flared portion and concentrically disposed within the flared portion. The injector sheath tube is parallel to the outer tube. An inner capillary injector tube injects sample air into the plasma fireball. The inner capillary injector tube is concentrically disposed within the injector sheath tube to form an inner annulus that directs annular flow of auxiliary gas to alter the surface of the central region of the plasma fireball and channels the sample air to inject it through the surface and into the plasma fireball. The annular flow of auxiliary gas assures injection of the sample air at velocities which preserve residence time of the sample air to effect efficient vaporization and excitation of the metals.
REFERENCES:
patent: 29304 (1860-07-01), Greenfield et al.
patent: 3296410 (1967-01-01), Hedger
patent: 3965747 (1976-06-01), McCorkle
patent: 3965748 (1976-06-01), Boubel et al.
patent: 4091835 (1978-05-01), Frampton
patent: 4159635 (1979-07-01), Sehmel
patent: 4293220 (1981-10-01), Denton et al.
patent: 4390772 (1983-06-01), Hiratake
patent: 4482246 (1984-11-01), Meyer et al.
patent: 4551609 (1985-11-01), Falk
patent: 4566342 (1986-01-01), Kurz
patent: 4575609 (1986-03-01), Fassell et al.
patent: 4649760 (1987-03-01), Wedding
patent: 4739147 (1988-04-01), Meyer et al.
patent: 5012065 (1991-04-01), Rayson et al.
patent: 5090257 (1992-02-01), Bruce
patent: 5233156 (1993-08-01), Chan et al.
patent: 5479254 (1995-12-01), Woskov et al.
patent: 5526110 (1996-06-01), Braymen
J.D. Chase Theoretical and Experimental Investigation of Pressure and Flow n Induction Plasmas, Journal of Applied Physics, Nov. 1971 vol. 42, No. 12, pp. 4870-4879.
D. Truitt & J.W. Robinson Spectoscopic Studies of Organic Compounds Introduced into a Radio Frequency Induced Plasma. Analytica Chemica Acta, 51-1970 pp. 61-67 Elsevier Publishing Company, Amsterdam.
Seltzer, Michael D. An Argon ICP-Based Continuous Emissions Monitor for Hazardous Air Pollutant Metals: Field Demonstration Presentation of the Ari Waste Managment Association. 90.sup.th Annual Management Exhibition.
Seltzer, Michael D. An Inductively Coupled Argon Plasma Continous Emissions Monitor forHazardous Air Pollutant Metals, Enviromental Science and Technology Sep. 1997. Submitted Apr. 1997.
Seltzer, Michael D & Gerhard A. Meyer, Keeping and Eye on Metals Emmisions, Enviromental Protection, Jun. 1997 vol. 8 No. 6--pp. 26-29.
Seltzer, Michael D. Continous Air Monitoring Using Inductively Coupled Plasma, Applied Spectorscopy, Submitted Jun. 1997.
Emmisions Measurment Branch, nsps Test Method, EMTIC M-002 Technical Support Division OAQPS, EPA, NAWS China Lake.
Bokar Gregory M.
Kalmbaugh David S.
Paschall Mark
The United States of America as represented by the Secretary of
LandOfFree
Modified plasma torch design for introducing sample air into ind does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Modified plasma torch design for introducing sample air into ind, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modified plasma torch design for introducing sample air into ind will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-953058