JPH10288465A - Wastes melting treatment equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To conduct melting treatment for industrial wastes having electrical insulation properties in a short time and efficiently by constructing equipment out of a rod-shaped heating medium heated by a high-frequency induction coil, a supply part supplying a material to be melted into a tubular body and a recovering part holding the molten material flowing down through a circular passage. SOLUTION: When waste of a heat insulating material of calcium silicate, for instance, is thrown into a hopper 19 as a material to be melted, it is pushed in by paddles 21 and fragmented by a cutter 22 and the fragments passing through a screen 23 are sent into a tubular body 10. In the tubular body 10, they are melted by a heating medium 15 heated to a high temperature (about 1500-1700 deg.C) by a high-frequency induction coil 11, flow down into a circular passage 14 and are recovered by a recovering vessel 16. Since the upper surface of the heating medium 15 is machined to be spherical, the molten material does not remain on the heating medium 15, but is guided smoothly to the circular passage 14. According to this constitution, it is possible to heat the material to be melted in a short time and to conduct supply of the material to be melted and recovery of the molten material consecutively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste melting apparatus suitable for melting electrical insulating industrial waste by induction heating using high frequency.

[0002]

2. Description of the Related Art Conventionally, a high frequency furnace utilizing high frequency induction heating is widely used as a melting furnace. As shown in FIG. 2, a conventional high-frequency furnace used as a melting furnace has an induction coil 2 wound around a crucible 1 made of a conductive material. By supplying a high-frequency current to the induction coil 2 by heating, the crucible is heated by Joule heat generated by the induction current generated in the crucible 1 made of a conductive material, and the melt 5 inside is melted and taken out from the gate 6 to the outside. .

In the above-mentioned high-frequency furnace, when the material to be melted inside the crucible is a conductive material, an induced current is also generated in the material to be melted, but when the material to be melted is an electrically insulating material, the induced current is generated. Since the melt is heated only by heat conduction from the crucible, when the heat conductivity of the melt is low, it takes a long time until the center of the crucible is sufficiently heated. In addition, when using it as a waste melting furnace, it is necessary to devise a mechanism for discharging the melt.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides a method for efficiently melting electrical insulating industrial waste in a short time by induction heating using a high frequency, and An object of the present invention is to provide a waste melting treatment apparatus capable of continuously performing supply and recovery of a melt after the melting treatment.

[0005]

According to the present invention, there is provided a waste melting treatment apparatus comprising: a tubular body made of a heat-resistant and electrically insulating material; a high-frequency induction coil wound around an outer periphery of the tubular body; A rod-shaped heating medium, which is disposed so as to leave an annular passage between the inner peripheral surface of the cylindrical body and the inner peripheral surface of the cylindrical body and is heated by the induction coil; A gist comprising a supply unit for supplying the melted material to, and a recovery unit which is located below the tubular body, is heated and melted by the heating medium, and stores the melt that flows down through the annular passage. I have.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As a preferred embodiment of the present invention, as shown in FIG. 1, a high-frequency induction coil 11 is wound around the outer periphery of a cylindrical body 10 made of a ceramic material.
Inside, a rod-shaped graphite heating medium 15 having an outer diameter smaller than the inner diameter of the cylindrical body is positioned so as to leave the annular passage 14,
This is placed in a melt recovery container 1 disposed below the cylindrical body.
6, and a hopper 19 is provided on the upper side of the cylindrical body. A paddle 21, a cutting cutter 22, and a screen 23 for pushing the material to be melted are mounted on a rotating shaft 20 provided therein. Attachment, the material to be melted is melted by the heating medium 15, flows down through the annular passage 14, and is collected in the collection container 16.

[0007]

FIG. 1 shows an embodiment of the present invention. In FIG. 1, reference numeral 10 denotes a cylindrical body made of a ceramic material having heat resistance and electrical insulation, 11 denotes a high-frequency induction coil wound around the outer periphery of the cylindrical body, 12 denotes a high-frequency power supply unit, and 13 denotes a power control unit. .

A heating medium made of graphite whose outer diameter is smaller than the inner diameter of the cylindrical body and whose upper surface is spherically formed is formed in the cylindrical body 10 so as to leave an annular passage 14 between itself and the inner surface of the cylindrical body. Fifteen
And is supported by a column 17 standing upright in a melt recovery container 16 arranged below the cylindrical body 10.
Reference numeral 18 denotes a heat insulating material provided outside the collection container 16.

Above the cylindrical body 10, a hopper 19 for supplying the molten material to the cylindrical body 10 is provided. A rotary shaft 20 is provided in the hopper 19, and a paddle 21 for pushing the material to be melted, a cutter 22 for cutting the material to be melted, and a screen 23 are attached to the rotary shaft 20.

The rotating shaft 20 includes an electric motor 24, a pulley 2
5, is driven to rotate via a belt 26 and a pulley 27.

Next, the operation state of the waste melting processing apparatus having the above-described configuration will be described. When, for example, calcium silicate heat insulator waste is poured into the hopper 19 as a material to be melted, it is pushed in by the paddle 21 and crushed by the cutter 22,
The crushed material that has passed through the screen 23 is sent to the cylindrical body 10, and in the cylindrical body 10, the heating medium 15 heated to a high temperature (about 1500 to 1700 ° C.) by the induction coil 11.
, And flows down into the annular passage 14, and the recovery container 1
6 to be collected.

Since the upper surface of the heating medium 15 is spherically processed, the molten material is smoothly guided to the annular passage 14 without staying in the heating medium. In this case, a similar effect can be obtained even if the shape is a truncated cone. The heating medium 15
If a ceramic coat is applied to the spherical surface portion, it is effective in preventing oxidation and preventing adhesion of foreign matter. Further, the material of the heating medium is not limited to graphite, and other materials such as zirconia can be selectively used.

According to an experimental example, in the melting treatment of calcium silicate heat insulating waste material, a graphite rod having a diameter of 100 mm and a length of 150 mm was used as a heating medium, and an output of 20 KW, 1 KW.
When the melting treatment was performed at a temperature of 600 ° C.,
Data of a processing capacity of 6 kg / hr is obtained.

As described above, according to the waste melting treatment apparatus having the above-described structure, the material to be melted is heated by the heating medium disposed inside the cylindrical body around which the induction coil is wound. It is heated in a shorter time than that heated from the surroundings. In addition, since the material to be melted flows down sequentially without staying inside the cylindrical body, supply of the material to be melted,
Recovery of the melt can be performed continuously.

[0015]

As described above in detail, according to the present invention, the insulating industrial waste is efficiently melted in a short time by induction heating using high frequency, and the supply of the material to be melted and the melting of the melted material are performed. Recovery can be performed continuously. In addition, by using a heating medium having a top surface processed into a spherical surface or a truncated cone, it is possible to make the melt easily flow down, so that the processing capacity can be increased.

[Brief description of the drawings]

FIG. 1 is a waste melting treatment apparatus showing one embodiment of the present invention.

FIG. 2 is a sectional view of a conventional high-frequency induction heating furnace.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crucible 2 Induction coil 3 High frequency power supply part 4 Power control part 5 Melted material 6 Gate 10 Cylindrical body 11 High frequency induction coil 12 High frequency power supply part 13 Power control part 14 Annular passage 15 Heating medium 16 Melt recovery container 17 Column 18 Heat insulation Material 19 Hopper 20 Rotary shaft 21 Push paddle 22 Cutter 23 Screen 24 Electric motor 25 Pulley 26 Belt 27 Pulley

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tadashi Kishino 1-14-1 Minami-Dankan, Yokohama City, Kanagawa Prefecture JGC Corporation Yokohama Office (72) Inventor Akio Naito 1-14- Minami-Denkan, Yokohama-shi, Kanagawa 1 JGC Yokohama Office (72) Inventor Yutaka Terauchi 1-14-1 Minami-Kansai, Yokohama-shi, Kanagawa Prefecture JGC Yokohama Office (72) Inventor Shiro Kikuchi 1-10-11 Shibadaimon, Minato-ku, Tokyo Nichias Inside the Company (72) Inventor Yoshihiro Yokoi 1-10-11 Shiba-Daimon, Minato-ku, Tokyo Inside Nichias Corporation (72) Inventor Takeshi Ochiai 1-10-11 Shiba-Daimon, Minato-ku, Tokyo Inside Nichias Corporation (72 Inventor Toru Tsukamoto Inside Nichias Co., Ltd. 1-10-11 Shiba-Daimon, Minato-ku, Tokyo

Claims (4)

[Claims] 1. A cylindrical body made of a heat-resistant and electrically insulating material, a high-frequency induction coil wound around an outer periphery of the cylindrical body, and an inner peripheral surface of the cylindrical body in the cylindrical body. A rod-shaped heating medium that is arranged so as to leave an annular passage therebetween and is heated by the induction coil; a supply unit that is above the cylindrical body and supplies a material to be melted to the cylindrical body; A recovery unit for storing a melt that is heated and melted by the heating medium and that flows down through the annular passage under the body. 2. The waste melting treatment apparatus according to claim 1, wherein the heating medium is made of graphite or zirconia and has a spherical upper end. 3. The waste melting treatment apparatus according to claim 1, wherein a ceramic coat is applied to a tip of the heating medium. 4. The waste melting treatment apparatus according to claim 1, wherein the supply unit includes a hopper, a push paddle rotatably driven inside the hopper, a cutter, and a screen.