Electric heating – Metal heating – By arc
Patent
1990-12-18
1993-10-26
Paschall, Mark H.
Electric heating
Metal heating
By arc
21912159, 21912143, 21912121, 110242, 110244, 25049221, B23K 900
Patent
active
052568547
ABSTRACT:
A method and apparatus for the pyrolytic destruction or synthesis of gases via a highly tunable combination of radio frequency heating and electron beam irradiation is disclosed. The method is appropriate for destroying toxic gases emanating from hazardous wastes and for synthesizing new molecules from the molecules of a gas. The method is also appropriate for creating scavenger gases and hot gases with large enthalpy for use in sterilization procedures, for example. Embodiments are disclosed employing inductive or direct waveguide/cavity coupling of radio frequency power to the gas. In embodiments of the invention, magnetic fields are used to modify the paths of the electrons in the beam to facilitate tuning and improve the energy efficiency of the system. In a two-stage system, solid and/or liquid wastes are first heated in order to vaporize the toxic materials. Then, the gases produced in the first stage are destroyed by the combination of radio frequency heating and electron beam irradiation of the invention.
REFERENCES:
patent: 4511593 (1985-04-01), Brandolf
patent: 4511594 (1985-04-01), Yanai et al.
patent: 4514437 (1985-04-01), Nath
patent: 4739170 (1988-04-01), Varga
patent: 4842704 (1989-06-01), Collins et al.
patent: 4851668 (1989-07-01), Ohno et al.
patent: 4874459 (1989-10-01), Coldren et al.
patent: 4897579 (1990-01-01), Hull et al.
patent: 5098483 (1992-03-01), Little et al.
Gollands, et al., "Stack Testing of the Mobile Plasma Arc Unit", EPA Hazardous Waste Engineering Research Laboratory, May, 1987.
Frank, Norman W. et al., "Operating and Testing a Combined SO.sub.2 and NO.sub.x Removal Facility", Environmental Progress, 6, pp. 177-182, (1987).
Kolak, Nicholas P., et al., "Trial Burns--Plasma Arc Technology", Nuclear and Chemical Waste Management, 7, pp. 37-41, (1987).
Hiley, J. et al., "High-Power Selfshielded Electron Processors and Their Application to Stack Gas Treatment", Nuclear Instruments and Methods in Physics Research, B24/25, pp. 985-989, (1987).
Barton, Thomas G., "Mobile Plasma Pyrolysis", Hazardous Waste, 1, pp. 237-247, (1984).
Barton, T. G., et al., "Managing PCB Wastes", Engineering Journal of Canada, 63, pp. 40-42 (1980).
Reed, Thomas B., "Induction-coupled Plasma Torch", Journal of Applied Physics, 32, pp. 821-824, (1961).
Eckert, Hans U., "Induction Plasmas at Low Frequencies", AIAA Journal, 9, pp. 1452-1456, (1971).
Bailin, Lionel J. et al., "Microwave Decomposition of Toxic Vapor Stimulants", Environmental Science & Technology, 9, pp. 254-258, (1975).
Daugherty, Jack D., "Electron Beam Ionized Lasers", Chapter 9 of Principles of Laser Plasmas, George Bekefi, Ed., pp. 369-419.
Bromberg Leslie
Cohn Daniel R.
Guss William C.
Lane Barton G.
Smatlak Donna L.
Massachusetts Institute of Technology
Paschall Mark H.
LandOfFree
Tunable plasma method and apparatus using radio frequency heatin does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tunable plasma method and apparatus using radio frequency heatin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tunable plasma method and apparatus using radio frequency heatin will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-960767