JP3197657B2 - Discharge treatment equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of supplying a large current power to a plurality of electrodes whose tips are opposed to each other with a predetermined gap therebetween, causing arc discharge between the tips of the electrodes. The present invention relates to a discharge treatment apparatus for heating a powdery object to be treated with high-temperature plasma.

[0002]

2. Description of the Related Art In recent years, arc discharge has occurred between the tips of a plurality of electrodes, and extremely high heat generated by this arc discharge has been developed.
In addition, light has begun to be used for various purposes.

On the other hand, when, for example, residual ash generated by incineration of waste is injected into a plasma generated in a discharge portion at the tip of the electrode and heated, when an object to be processed is continuously input into the plasma, an amount of input is reduced. There is a problem that unevenness in heating occurs in the processed product after heating due to the balance between the heating and the amount of heating by the plasma.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to heat a relatively large number of workpieces continuously and uniformly.

[0005]

SUMMARY OF THE INVENTION The present invention relates to an electrode unit having a plurality of electrodes whose tips are arranged at a predetermined gap from each other, a power supply device for supplying a large current to these electrodes, and an electrode unit. And a delivery device for delivering the powdery object to be processed toward the gap portion, wherein the electrode units are arranged in a plurality of vertical positions.

[0006]

The object to be processed is sequentially heated by a plurality of electrode units, whereby a relatively large number of objects can be continuously and uniformly heated.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an embodiment of the present invention will be described with reference to FIG. 1. (1) is a hollow cylindrical treatment tower made of a firebrick, etc. By squeezing, a plurality of relatively small diameter discharge spaces (2) and (2) are formed, and an outlet (3) is opened at the bottom.

[0008] (4) is a conveyor device connected to the bottom of the processing tower (1), and heats the heat-treated workpiece falling from the discharge port (3) into a stocker (5) by a belt conveyor (5). Collected in 6).

(7A) and (7B) are discharge spaces of the processing tower (1).
(2) (2) As shown in FIG. 2, for example, six electrodes T1 to T6 of the plurality of discharge units mounted on the upper side by the insulating support members (8) and (8) 3 are arranged at equal intervals around the through holes (9) and (9) formed substantially in the center, and between the opposing electrodes as shown in FIG. 3 between the tips Q1 to Q6 of these electrodes. For example, a predetermined gap G of 15 to 20 mm
Is formed.

The electrodes T1 to T6 are connected to a three-phase transformer (3 sets) for connecting a three-phase AC power source shown in FIG. 10) (11) (12)
The winding end of the secondary winding of one of the transformers (10a) (11a) (12a) and the winding start of the secondary winding of the other transformers (10b) (11b) (12b). And the output O1 of a power supply device (13) such as a six-phase AC power source which further connects these connection portions.
To O6, firing controllers R1 to R6 using thyristors and the like.
Connected through.

Although the discharge units (7A) and (7B) have a two-stage configuration in the embodiment, they can be additionally configured with three or more stages. For example, a four-phase AC power supply or a DC power supply, etc., filed by the present inventor in Japanese Patent Application No. Hei 4-249055 can be used.

In FIG. 1, reference numeral (14) denotes a delivery means mounted above the upper electrode unit (7). As shown in FIG. (17) connected to the hopper (15), and formed at the lower end thereof with an expanding spout (16) for discharging an object to be processed toward the gap G at the tip of the electrode. A gas duct (18) for ejecting, for example, nitrogen gas, argon gas, etc., toward the ejection port, the hopper (15) and the duct (17)
Screw for processing object mounted inside the connection part with
(19) and a motor (21) that drives the screw to rotate on a rotating shaft (20).

Reference numeral (22) denotes a dispersion member mounted substantially at the center of the ejection port (16). The dispersion member disperses the mixture of the processing object and gas ejected from the ejection port so as not to pass through the center of the gap (G). Various shapes such as a spherical shape, an elliptical spherical shape, and a conical shape can be considered.

The gas supplied from the gas duct (18) is for sending the object to be processed substantially uniformly to the gap G, and may be air. In the case of air, however, a large amount of gas is consumed due to oxidation of the electrodes. 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 longer than in the case of air, and in the case of nitrogen gas, the consumption amount is smaller than that of argon gas. .

When incinerating an object to be treated such as powdery ash which has been treated in a garbage incineration plant, the object to be treated is stored in a hopper (15), and the power supply device (13 ) To generate an arc discharge between the electrodes T1 to T6 to generate plasmas A1 and A2 in the electrode units (7A) and (7B) as shown in FIG.
In addition, the motor (21) is operated to rotate the screw (19) to convey the object to be treated in the hopper (15) into the duct (17), and at the same time, gas is supplied from the gas duct (18) into the duct (17). The object to be processed that has been ejected and conveyed into this duct is ejected together with gas into the
6) Spouts toward the plasmas A1 and A2.

The mixture of the jetted gas and the object to be processed is first formed by an arc formed on the first-stage electrode unit (7A).
After passing through A1 and heated, the second stage electrode unit
After passing through the arc A2 formed in (7B), it is further heat-treated to be a substantially uniform bead-like ceramic, and after dropping from the outlet (3) of the processing tower (1) to the belt conveyor (5), While being cooled on this conveyor, it is collected in a stocker (6).

Further, if the electrode units (7A) and (7B) are further added in multiple stages, even if the amount of the object to be processed carried by the screw (19) is increased, a uniform heat treatment can be performed. Can be measured.

[0018]

According to the structure of the present invention, by arranging the electrode units in multiple stages and heating the processing object stepwise, a relatively large amount of the processing object can be continuously and uniformly heated. You can do it.

[Brief description of the drawings]

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

FIG. 2 is a schematic connection diagram of a main 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]

 7A electrode unit 7B electrode unit 13 Power supply 14 Sending out device T1 ~ T6 electrode

Continuation of the front page (51) Int.Cl. ⁷ Identification symbol FI H05H 1/46 B09B 3/00 303L (72) Inventor Masami Fukumoto 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Tottori Sanyo Electric Co., Ltd. (72 ) Inventor Naoyuki Takemoto 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Tottori Sanyo Electric Co., Ltd. (56) References JP-A-4-249800 (JP, A) (58) Fields investigated (Int. Cl. ⁷⁾ , DB name) H05B 7/18 B09B 3/00 B01J 19/08 F23J 1/00 H05H 1/46

Claims (1)

(57) [Claims] 1. An electrode unit having a plurality of electrodes whose tips are arranged at a predetermined gap from each other, a power supply device for supplying a large current power to these electrodes, and an electrode unit facing the gap of the electrode unit. A discharge device for discharging a powdery workpiece, wherein the electrode units are arranged in a plurality of vertical stages.