Furnaces – Process
Patent
1990-12-14
1992-06-23
Yuen, Henry C.
Furnaces
Process
431 2, 431 8, F23B 700, F23C 500
Patent
active
051233622
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a material having a function of ionizing a combustion flame of a hydrocarbon, and an application thereof. According to the present invention, a high-temperature plasma flame can be generated without using an electric discharge, and thus the present invention can be valuably utilized in industrial fields where a high temperature is required, for example, an incineration of industrial wastes and decomposing matter or putrefactions containing a large quantity of water, and the metallurgical and ceramic fields. Furthermore, it is considered that the flame ionizing material of the present invention will be able to be used as an ion-generating source for an ion-propelled engine or as a semiconductor.
BACKGROUND ART
In industrial fields where a high-temperature treatment is necessary, a plasma has been heretofore utilized as the high temperature-generating means, and since the conventional plasma-generating method utilizes an electric discharge, it has a basic problem in that a large amount of electric power is necessary, and further, the method is disadvantageous in that the means for generating the plasma is complicated and expensive.
Alternatively, a method in which a hydrocarbon is burnt by using a catalyst comprising specific metals in combination is known (see, for example, U.S. Pat. No. 3,842,015), Japanese Examined Patent Publication No. 61-20764 and Japanese Unexamined Patent Publication No. 63-283751), but this method is directed to the treatment of automobile exhaust gas or factory exhaust gas, and the combustion temperature is 1500.degree. C. at highest.
DISCLOSURE OF THE INVENTION
Accordingly, a primary object of the present invention is to provide a means for generating a plasma at a high efficiency without utilizing an electric discharge. A secondary object of the present invention is to provide a method by which a prompt and efficient incineration of wastes is carried out, as a typical instance of a utilization of a high temperature generated by the above-mentioned means.
The primary object of the present invention, i.e., a generation of a plasma without utilizing an electric discharge, is attained by a material having a function of ionizing at least a part of a combustion flame of a hydrocarbon when the combustion flame comes into contact with the material (this material will be called "flame-ionizing material" hereinafter). The second object of the present invention, that is, the method of generating a high temperature without utilizing an electric discharge, is attained by causing a combustion flame of a hydrocarbon to come into contact with this flame-ionizing material.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 through 3 are schematic diagrams illustrating an incinerator utilizing the method of the present invention;
FIG. 4 is a schematic diagram illustrating a modification of this incinerator;
FIG. 5 and 6 are schematic diagrams illustrating a burner used in the method of the present invention;
FIG. 7 is a conceptual diagram illustrating a modification of this burner; and
FIG. 8 is a conceptual diagram illustrating an electron beam emission tube.
BEST MODE OF CARRYING OUT THE INVENTION
The flame-ionizing material of the present invention is provided by sintering in an oxidative atmosphere a composition comprising a magnetic material and, incorporated therein, a substance, the specific electric resistance of which is varied under irradiation with radioactive rays (hereinafter referred to as "optically active substance"). As the optically active substance, there can be mentioned, for example, simple substances and compounds such as oxides, sulfides and halides of selenium, cadmium, titanium, lithium, barium and thallium. As the magnetic material, there can be used ferromagnetic materials (for example, iron, nickel and cobalt, and compounds thereof), paramagnetic materials (for example, manganese, aluminum and tin, and compounds thereof), and diamagnetic materials (for example, bismuth, phosphorus, copper and calcium, and compounds the
REFERENCES:
patent: 3269446 (1966-08-01), Luther
patent: 3306338 (1967-02-01), Wright et al.
patent: 3749545 (1973-07-01), Velkoff
patent: 3841824 (1974-10-01), Bethel
patent: 3842015 (1974-10-01), Vogt et al.
patent: 4052139 (1977-10-01), Paillaud et al.
patent: 4260583 (1981-04-01), Sanclemente
Shirakawa Shiro
Yuen Henry C.
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