JPH062830A - Treating method of refuse incineration ash and device therefor - Google Patents

Abstract

PURPOSE:To obtain the treating method of refuse incineration ash, which is easy in operation and capable of treating molten slag simply, and a device therefor. CONSTITUTION:A melting furnace 20, filled with incinerating ash, is carried into a facility 1 for treating the incinerating ash of waste matters and the like to treat them, then, a plurality of electrodes 7, 12, arranged so that an interval between mutual tip ends becomes narrower than another interval between mutual ends, are inserted into the incinerating ash in the melting furnace 20 to effect electric melting and when the incinerating ash is molten, the melting furnace 20 is carried out of the facility 1 to throw it away or solidified incinerating ash is thrown away.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for treating incinerated ash for melting waste incinerated ash.

[0002]

2. Description of the Related Art Conventionally, waste incineration ash in an incinerator is often landfilled. However, since it is becoming more difficult to secure landfill sites year after year, there is a demand for a method of reducing the volume of landfill incineration ash, that is, volume reduction treatment.

In an electric melting furnace facility in which incinerated ash discharged from a refuse incinerator is charged, heated and melted by arc discharge between electrodes, and cooled to solidify, the incinerated ash is not conductive at room temperature, and thus melts. At the time of starting the furnace, a conductor such as scrap is put into the furnace and melted by arc discharge to form a base metal. The incineration ash is put in after forming the base metal and is heated and melted. Since the slag formed by melting the incinerated ash is electrically conductive, the molten slag is then electrically conductive to generate heat, and the incinerated ash is continuously melted.

The molten slag produced in this way is discharged and solidified through a discharge trough from a discharge port as shown in, for example, Japanese Patent Publication No. Sho 62-24694, or is disclosed in Japanese Patent Publication No. 3-17770. Thus, it is continuously discharged from the discharge port to the water tank, solidified and discarded.

[0005]

In the conventional electric melting furnace as described above, when the operation is stopped and the slag temperature in the furnace is lowered to lose the conductivity, the operation is restarted. After removing the incinerated ash and slag inside, scrap must be put in the vicinity of the electrode, which not only takes a lot of time until the start of operation, but is also extremely troublesome.

In the conventional equipment, the slag solidified through the discharge gutter or the slag cooled and solidified in the water tank is loaded on a transport vehicle or the like by a transport facility and transferred to a landfill site for landfill disposal. However, there have been various problems such as the large scale of these facilities and large amount of facility cost.

The present invention has been made to solve the above problems, and it is an object of the present invention to obtain a method and an apparatus for treating refuse incinerated ash that is easy to operate and that can treat molten slag easily. It is intended.

[0008]

A method for treating refuse incinerated ash according to the present invention is to carry in a melting furnace containing the incinerated ash into a facility for melting and treating the incinerated ash such as wastes, and to carry out the mutual tip treatment. Insert the tip of multiple electrodes with the interval between the other ends narrower than the interval between the other ends into the incineration ash in the melting furnace to perform electric melting of the incineration ash, and when all or most of the incineration ash is melted The melting furnace is carried out.

Further, in the apparatus for treating refuse incinerated ash, a plurality of electrodes are held so that the distance between the tips is smaller than the distance between the ends, and the electrodes are held and the distance between them is large. And a holding / adjusting means for adjusting the vertical position, a melting furnace in which the incineration ash is put, and a melting furnace conveying means for carrying the melting furnace below the electrode or carrying it out therefrom.

[0010]

First, the distance between the electrodes and the height position thereof are adjusted in a state where the melting furnace is loaded in advance. next,
The melting furnace in which the incineration ash was put in by the melting furnace transfer means was carried in below the electrode, and the electrode was lowered and inserted into the incineration ash,
A voltage is applied between both electrodes to melt the incineration ash by arc heating and then slag resistance heating. When all or most of the incineration ash is melted, raise the electrode, carry out the melting furnace, load it on a carrier, etc., transport it to the burial site, and bury it.
Alternatively, it is piled up at a predetermined place and disposed of. In some cases, only solidified incineration ash is discarded and the melting furnace is reused.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic diagram showing the structure of an embodiment of the present invention. In the figure, 1 is an incineration ash melting facility, 2 is a first support pillar standing on the floor, 3 is an electrode holding block mounted on the first support pillar 2 so as to be movable up and down, 4 is an electrode holding block 4 Is a motor for driving. 5 is an electrode holding block 3
A first electrode 7 is held almost vertically by a holder 6 provided at the tip end of the bar, which is mounted on the holder so as to be movable in the left-right direction. A motor 8 drives the bar 5.

Numeral 10 is a second pillar which is erected on the floor at a predetermined distance from the first pillar 2, and numeral 11 is attached to this pillar 10 and the tip of the second electrode 12 is the first. Is a holding member which is slidably held so as to be close to the electrode 7 and the other end thereof is separated from the first electrode 7. Reference numeral 13 is a holder attached to the top of the second electrode 12, to which one end of a chain, wire or the like 14 is connected.
Is hung on sprockets 15 and 16 provided on the column 10, and a counterweight 18 is attached to the other end. A motor 17 drives the sprocket 15.

In the incineration ash melting facility 1 configured as described above, the first electrode 7 is driven by driving the motor 4.
Can be moved in the vertical direction and by driving the motor 8, the first electrode 7 can be moved in the horizontal direction. In addition, by driving the motor 17, the second electrode 12 can be slid along the holding member 11 in an obliquely vertical direction.

A reference numeral 20 designates a cartridge-type melting furnace made of, for example, an iron plate, which has an opening 21 in the upper portion and is carried between the columns 2 and 10 below the electrodes 7 and 12, for example, a rail laid on the floor. It is movably mounted on (not shown).

Next, the operation of the present invention will be described with reference to FIGS. First, an empty melting furnace 20 is loaded in advance between the columns 2 and 10, and the motor 17 is driven so that the tip of the second electrode 12 is located at a height y from the bottom of the melting furnace 20. adjust. Then, the motors 4 and 8 are driven to adjust the tip of the first electrode 7 so that it is located at the height y from the bottom of the melting furnace 20, and the distance from the tip of the second electrode 12 is adjusted. Adjust to eliminate.

When the adjustment is completed, the position is stored in, for example, a control device (not shown), and the incineration ash 25 is put in the melting furnace 20. A large number of empty melting furnaces 20 are prepared in other places so that they can be used one after another.

In this state, a voltage is applied between the two electrodes 7 and 12, and if necessary, the distance x between the tips of the two electrodes 7 and 12 is adjusted to generate an arc between the two. To heat and melt.

When the incinerated ash 25 is melted and the molten slag 26 is accumulated in the vicinity of the tips of the electrodes 7 and 12, the electrodes 7 and 12 are electrically connected to each other, and a current flows to shift to resistance heating. , 12 to increase the voltage by separating the interval x, and maintaining the interval x and the applied voltage in the most efficient state to continue the melting of the incineration ash. In addition, since the incineration ash 25 having a heat insulating effect is interposed between the molten slag 26 and the melting furnace 20, the melting furnace 20 does not melt. The volume of the incinerated ash 25 is reduced to about one third when it is melted and solidified. Therefore, when the level of the incinerated ash 25 in the melting furnace 20 decreases, the incinerated ash 25 may be replenished. Good.

When all or most of the incineration ash 25 in the melting furnace 20 is melted, the power supply to the electrodes 7 and 12 is stopped,
Both electrodes 7 and 12 are pulled up to a position where the melting furnace 20 does not interfere, and the melting furnace 20 is carried out. At this time, as shown in FIG. 3, most of the inside of the furnace is filled with the solidified slag, and the incinerated ash 25 slightly remains above.

When the melting furnace 20 in which the incinerated ash 25 is melted is carried out, the next melting furnace 20a is carried in, and the incinerated ash 25 is melted and solidified again in the same manner as described above. On the other hand, the carried-out melting furnace 20 is loaded as it is on a transportation vehicle or the like, transported to an burying place and buried, or stacked at a predetermined place for disposal. In some cases, only the solidified incineration ash may be discarded and the melting furnace 25 may be reused.

In the above description, the first electrode 7 is arranged vertically and the second electrode 12 is arranged so as to be inclined, but the respective electrodes may be arranged so as to be inclined. Well again
You may provide three or more electrodes. Furthermore, the electrodes 7, 12
The electrode holding / adjusting device for holding and adjusting the position of the electrode is not limited to the above embodiment, but can be changed as appropriate. Further, although an example in which the melting furnace is carried in and out by a rail laid on the floor is shown, other means may be used.

[0022]

As described above in detail, according to the present invention, a part or all of a plurality of electrodes whose positions can be adjusted are inclined, and the melting furnace can be loaded and unloaded. Such a remarkable effect can be obtained. (1) When melting the incineration ash, it is not necessary to throw in scraps and the like, and it suffices to energize the electrodes inserted in the incineration ash, so that the operation becomes extremely easy. (2) Since the molten slag discharge port and cooling equipment are not required, the melting furnace and equipment are simplified.

(3) The incinerated ash is put into the melting furnace at a place other than the melting equipment, and the molten slag is solidified in the melting furnace and transported and disposed together with the melting furnace, so that the melting equipment is kept clean. At the same time, there is no risk of dust or the like flying up during loading, transportation, burial, etc., and a favorable result in hygiene can be obtained. (4) At the time of disposal, since the slag is buried in the melting furnace or stacked in a predetermined place, there is no risk that harmful substances contained in the slag will soak into the ground or flow out.

[Brief description of drawings]

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

FIG. 2 is an explanatory view of the operation of the embodiment of the present invention.

FIG. 3 is an explanatory view of the operation of the embodiment of the present invention.

[Explanation of symbols]

 1 Incinerator ash melting equipment 2,10 Support 7 First electrode 12 Second electrode 20 Melting furnace 25 Incinerator ash 26 Molten slag 27 Solidified slag

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuo Akashi 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Steel Pipe Co., Ltd.

Claims (2)

[Claims] 1. In a facility for melting and treating incinerated ash such as waste, a melting furnace in which the incinerated ash is placed is carried into the facility, and the interval between the tip ends is made narrower than the interval between the other ends. Inserting the tips of a plurality of electrodes into the incineration ash in the melting furnace to perform electric melting of the incineration ash, and when all or most of the incineration ash in the melting furnace is melted, carry out the melting furnace. A method for treating waste incineration ash, which comprises: 2. A facility for melting and treating incinerated ash such as waste, wherein a plurality of electrodes are held so that the distance between the tip portions is narrower than the distance between the other end portions, and the electrodes are held. In addition, holding and adjusting means for adjusting the distance between the electrodes and the vertical position, a melting furnace in which the incinerated ash is put, and a melting means for carrying the melting furnace into or out of the electrode. An apparatus for treating refuse incinerated ash, comprising: a furnace transfer means.