JPH06246153A - Discharge treating device - Google Patents

Abstract

PURPOSE:To surely prevent the dissipation of plasma due to the passage of a material to be treated through the plasma center and to efficiently heat-treat the material while promoting its oxidation by delivering the powdery material around the plasma through a dispersion member and preventing its passage through the plasma center. CONSTITUTION:This discharge treating device is formed by an electrode unit 7 having plural electrodes T1 to T6 with the tips arranged with gaps G in between, a power unit 13 for supplying a heavy current to the electrode and a duct 14 for delivering a powdery material to be treated toward the gaps G of the unit 7. A dispersion member 18 for delivering the material to the gaps G close to the electrode tip is arranged at the delivery part of the duct 14. Consequently, the passage of the powdery material through the plasma center is prevented, the dissipation of plasma is surely obviated, and the mateial is efficiently heat-treated while promoting its oxidation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention supplies a large-current power to a plurality of electrodes whose ends are opposed to each other with a predetermined gap therebetween, and causes arc discharge between the ends of the electrodes. The present invention relates to an electric discharge treatment apparatus that heat-treats a powdery object to be treated with high-temperature plasma.

[0002]

2. Description of the Related Art In recent years, an arc discharge is generated between the tips of a plurality of electrodes, and extremely high heat generated by this arc discharge,
In addition, light is being used for various purposes.

On the other hand, when the residual ash generated by incineration of waste is continuously charged into the discharge part of the electrode tip to be heated, a large amount of the object to be processed is formed in the central part of the plasma generated by the arc discharge. When thrown in, there is a problem that the above-mentioned plasma flies and disappears.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to prevent the object to be processed from passing through the center of arc discharge as much as possible and prevent the disappearance of plasma due to the passage of the center.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to an electrode unit having a plurality of electrodes whose tips are spaced apart from each other by a predetermined gap, a power supply device for supplying a large current to these electrodes, and an electrode unit. And a duct for delivering the powdery material to the gap of the duct.
A dispersion member for delivering the object to be processed toward the tip of the electrode in the gap is arranged.

[0006]

The object to be processed is sent to the plasma formed in the gap between the plurality of electrode tips by the duct, and at the same time, the object to be treated is sent to the electrode tip in the gap by the dispersion member. Prevents the passage of the plasma center of
It is possible to prevent the disappearance of plasma due to passage.

[0007]

EXAMPLE An example of the present invention will be described first with reference to FIG. 1. (1) is a hollow cylindrical treatment tower composed of refractory bricks, etc., and the discharge space having a relatively small diameter is formed by further narrowing the upper part.
(2) is formed, and an outlet (3) is opened at the bottom.

(4) is a conveyor device which is connected to the bottom part of the processing tower (1), and the heated object to be processed which has dropped from the discharge port (3) is stored in the stocker (6) by the belt conveyor (5).
Are to be collected in.

(7) is the discharge space (2) of the processing tower (1)
In the discharge unit mounted on the upper side, as shown in FIG. 2, for example, six electrodes T1 to T6 are provided by an insulating support member (8).
Are arranged at a regular interval around the through hole (9) formed substantially in the center of the support member, and are arranged between the tips Q1 to Q6 of these electrodes, for example, as shown in FIG. ~ 20 mm
A predetermined gap G is formed.

Further, for the electrodes T1 to T6, for example, two sets of three transformers for connecting the three-phase AC power source shown in FIG. 2, which is filed by the present inventor in Japanese Patent Application No. 4-228984. (10) (1
1) (12) and one of these transformers (10a) (11a) (12a)
End of the secondary winding and the other transformer (10b) (11b) (12b)
An ignition controller using a thyristor, etc., for the outputs O1 to O6 of a power supply device (13) such as a 6-phase AC power supply in which the winding start of the secondary winding is connected and the connection parts are further connected. R1
Through R6.

The power supply unit (13) is not limited to the six-phase type, and for example, the present inventor has proposed Japanese Patent Application No. 4-24905.
It is also possible to use a four-phase AC power source applied in No. 5 or a DC high-voltage power source.

In FIG. 1, (14) is the above electrode unit.
With the duct installed above (7), as shown in Fig. 4,
The upper end is connected to a hopper (15) in the shape of a brim for accommodating an object to be treated in powder form, and at the lower end, an expelling jet ( 16)
And a gas duct (17) for ejecting, for example, nitrogen gas, argon gas or the like is connected toward the ejection port on the way.

Reference numeral (18) is a dispersion member mounted substantially in the center of the jet port (16) so that the mixture of the object to be treated and the gas jetted from the jet port does not pass through the center of the gap G. Various shapes such as spherical shape, elliptic spherical shape, and conical shape are conceivable.

The dispersion member (18) is composed of the electrodes T1 to T6.
It is necessary to consider the jet flow due to the rotating magnetic field generated at the same time when the arc discharge is generated between the tips Q1 to Q6 of the.

The gas supplied from the gas duct (17) is for sending the object to be processed into the gap G substantially uniformly, and may be air, but in the case of air, the amount of consumption due to oxidation of the electrode is large. Therefore, nitrogen gas, argon gas, etc. are preferable. According to experiments, in the case of argon gas, the life of the electrode is about 100 times that of air, and in the case of nitrogen gas, the consumption amount is even smaller than that of argon gas. .

Reference numeral (19) is a screw for delivering an object to be processed, which is mounted inside the connecting portion between the hopper (15) and the duct (14).
The rotating shaft (20) is driven by a motor (21) to continuously convey the powdery material to be treated in the hopper (15) into the duct (14).

Thus, for example, when incinerating an object to be treated such as powdery residual ash processed in a refuse incinerator, the object to be treated is stored in the hopper (15) and the power supply (13) ) To cause arc discharge between the electrodes T1 to T6 to generate plasma A as shown in FIG. 3, and the motor (21) is operated to turn on the screw.
Rotate (19) and put the object in the hopper (15) in the duct (14)
At the same time, the gas is ejected from the gas duct (17) into the duct (14), and the object to be treated conveyed into the duct is ejected together with the gas toward the plasma A from the ejection port (16). .

At this time, the mixture of the gas and the object to be treated rides on the jet flow due to the rotating magnetic field generated by the arc discharge, while the dispersion member (18) in the ejection port (16) mainly causes the peripheral portion of the plasma A to flow. Pass through, heat treated by passing to form bead-shaped ceramics, discharge port of processing tower (1)
After falling onto the belt conveyor (5) from (3), it is collected on the stocker (6) while being cooled on this conveyor.

The temperature of the plasma A generated by the arc discharge reaches close to 10,000 ° C. as described in Japanese Patent Application No. 4-228984, and the powdery object to be treated has a volume of about 1/5. Heat treatment to ceramic.

[0020]

According to the structure of the present invention, the powdery material to be processed is mainly sent to the peripheral part of the plasma by the dispersing member to prevent the powdery material from passing to the central part of the plasma, so that the central part of the plasma to be processed is processed. It is possible to surely prevent the disappearance of plasma due to the passage of oxygen and to perform efficient heat treatment by promoting the oxidation of the object to be treated.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of the present invention.

FIG. 2 is a schematic connection diagram of a part of the present invention.

FIG. 3 is a diagram illustrating a part of the operation of the present invention.

FIG. 4 is a configuration diagram of a main part of the present invention.

[Explanation of symbols]

 7 Electrode unit 13 Power supply device 14 Duct 18 Dispersion member R Gap T1 to T6 electrode

Front page continuation (72) Masami Fukumoto, Inami Sanyo Denki, 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture (72) Inventor Takeyuki Naomoto, 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Sanyo Denki Co., Ltd.

Claims (1)

[Claims] 1. An electrode unit having a plurality of electrodes whose tips are arranged with a predetermined gap between them, a power supply device for supplying a large current power to these electrodes, and a gap portion of the electrode unit. An electric discharge treatment apparatus comprising: a duct for delivering a powdery object to be treated, and a dispersing member for delivering the object to be treated toward a tip of an electrode in a gap is arranged at a delivery portion of the duct.