JP2770658B2 - Waste incineration ash treatment method and apparatus - 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 and an apparatus for treating incinerated ash which melts incinerated ash such as waste.

[0002]

2. Description of the Related Art In the past, refuse incineration ash from incinerators has often been landfilled. However, since it is increasingly difficult to secure landfill sites year by year, there is a demand for a method of reducing the volume of incinerated ash to be landfilled, that is, a volume reduction treatment.

[0003] In an electric melting furnace in which incinerated ash discharged from a garbage incineration plant is injected, heated and melted by arc discharge between electrodes, and cooled and solidified, the incinerated ash is not conductive at room temperature. When the furnace is started, a conductor such as scrap is put into the furnace and melted by arc discharge to form a base metal. The incinerated ash is introduced after the formation of the base metal and is heated and melted. Since the slag formed by melting the incineration ash has conductivity, the slag is thereafter conductive to generate heat, thereby continuing the melting of the incineration ash.

[0004] The molten slag thus produced is discharged and solidified through a discharge gutter from a discharge port as shown in Japanese Patent Publication No. 62-24694, or as shown in Japanese Patent Publication No. 3-177770. As described above, it is continuously discharged from the discharge port into the water tank, solidified and discarded.

[0005]

In the above-mentioned conventional electric melting furnace, when the operation is stopped and the slag temperature in the furnace is lowered and the conductivity is lost, the operation is started again. After removing incineration ash and slag from inside, scrap must be put in the vicinity of the electrode, so that not only it takes much time to start operation, but also it is extremely troublesome.

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

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a method and an apparatus for treating incinerated ash, which can be easily operated and can easily treat molten slag. It is intended.

[0008]

According to the present invention, there is provided a method for treating incinerated ash according to the present invention, wherein a melting furnace comprising an open container containing incinerated ash is loaded into a facility for melting and treating incinerated ash such as waste. The tips of a plurality of electrodes, the distance between the tips being narrower than the distance between the other ends, are inserted into the incineration ash in the melting furnace to electrically melt the incineration ash, and the front or large portion of the incineration ash is performed. When the part is melted, the melting furnace is carried out.

Further, in the refuse incineration ash treatment apparatus, a plurality of electrodes held so that the interval between the tip portions is smaller than the interval between the other end portions, the plurality of electrodes are held, and the interval between the electrodes is held. Holding and adjusting means for adjusting the position in the vertical direction, a melting furnace of an open container in which incineration ash is put, and a melting furnace transport means for carrying the melting furnace below or below the electrode. It is.

[0010]

First, the distance between the electrodes and the height position are adjusted beforehand when the melting furnace is loaded. next,
The melting furnace in which the incineration ash is put by the melting furnace transport means is carried in to the bottom of the electrode, the electrode is lowered and inserted into the incineration ash,
A voltage is applied between the two electrodes to melt the incinerated ash by arc heating and then by slag resistance heating. When all or most of the incinerated ash is melted, raise the electrode and take out the melting furnace, load it on a transport vehicle, transport it to the landfill site, and bury it.
Alternatively, they are stacked and disposed at a predetermined place. In some cases, only the solidified incineration ash is discarded, and the melting furnace is reused.

[0011]

FIG. 1 is a schematic diagram showing the configuration of an embodiment of the present invention. In the drawing, reference numeral 1 denotes an incineration ash melting facility, 2 denotes a first support standing upright on a floor, 3 denotes an electrode holding block mounted on the first support 2 so as to be movable up and down, 4 denotes an electrode holding block 4 Is a motor for driving the motor. 5 is an electrode holding block 3
The first electrode 7 is held substantially vertically in a holder 6 provided at the tip of the bar so as to be movable in the left-right direction. Reference numeral 8 denotes a motor for driving the bar 5.

Reference numeral 10 denotes a second support standing upright on the floor at a predetermined distance from the first support 2, and reference numeral 11 denotes a second support mounted on the support 10, and a second electrode 12 having a first end connected to the first support. Is a holding member that is close to the first electrode 7 and has the other end inclined and slidably held away from the first electrode 7. Reference numeral 13 denotes a holder mounted on the top of the second electrode 12, to which one end of a chain, a 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. Reference numeral 17 denotes a motor that drives the sprocket 15.

In the incineration ash melting equipment 1 configured as described above, the first electrode 7 is driven by driving the motor 4.
Can be moved in the up-down direction, and the first electrode 7 can be moved in the left-right direction by driving the motor 8. Further, by driving the motor 17, the second electrode 12 can be slid obliquely up and down along the holding member 11.

Reference numeral 20 denotes a cartridge-type melting furnace made of, for example, an iron plate, which has an opening 21 at an upper portion and is carried below the electrodes 7, 12 between the two columns 2, 10, and is, for example, a rail laid on the floor. (Not shown), and is movably mounted thereon.

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 two 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 furnace bottom of the melting furnace 20. adjust. Next, the motors 4 and 8 are driven to adjust the tip of the first electrode 7 so as to be located at a height y from the furnace bottom of the melting furnace 20, and to adjust the distance from the tip of the second electrode 12. 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 into the melting furnace 20. It should be noted that a number of empty melting furnaces 20 are prepared in other places so that they can be used sequentially.

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. Is heated and melted.

When the incinerated ash 25 melts and molten slag 26 accumulates in the vicinity of the tips of the electrodes 7 and 12, conduction between the electrodes 7 and 12 occurs, and current flows to shift to resistance heating. , 12 are spaced apart from each other to increase the voltage, the interval x and the applied voltage are kept in the most efficient state, and the melting of the incineration ash is continued. Since the incinerated ash 25 having an insulating effect is interposed between the molten slag 26 and the melting furnace 20, the melting furnace 20 is not melted. When the incineration ash 25 is melted and solidified, its volume is reduced to about one-third. Therefore, when the level of the incineration ash 25 in the melting furnace 20 decreases, the incineration ash 25 may be supplemented. Good.

When all or most of the incineration ash 25 in the melting furnace 20 has melted, the power supply to the electrodes 7 and 12 is stopped,
The two 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, most of the inside of the furnace is filled with solidified slag, as shown in FIG. 3, and incineration ash 25 slightly remains above.

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

In the above description, an example is shown in which the first electrode 7 is disposed vertically and the second electrode 12 is disposed obliquely. However, each electrode may be disposed obliquely. Well,
Three or more electrodes may be provided. Further, the electrodes 7, 12
The electrode holding / adjusting device for holding and adjusting the position thereof is not limited to the above-described embodiment, but can be appropriately changed. Further, although an example has been shown in which the melting furnace is loaded and unloaded by rails laid on the floor, other means may be used.

[0022]

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

(3) The incinerated ash is put into the melting furnace at a place other than the melting facility, and the molten slag is solidified in the melting furnace and transported and disposed together with the melting furnace, so that the melting facility is kept clean. At the same time, there is no danger of dust and the like rising during loading, transportation, burying, and the like, and a favorable result in terms of hygiene can be obtained. (4) At the time of disposal, the slag is buried while being placed in the melting furnace, or is stacked at a predetermined place, so that there is no risk that harmful substances contained in the slag will permeate into the ground or flow out.

[Brief description of the drawings]

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

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

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

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 incineration ash melting equipment 2, 10 columns 7 first electrode 12 second electrode 20 melting furnace 25 incineration ash 26 molten slag 27 solidified slag

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Tetsuo Akashi 1-2-1 Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (56) References JP-A-60-1552813 (JP, A) JP-A-3 −112826 (JP, A) Japanese Utility Model 1-61530 (JP, U) (58) Fields investigated (Int.Cl. ⁶ , DB name) F23J 1/00 F23G 5/00 115 F23J 1/08

Claims (2)

(57) [Claims] In a facility for melting and treating incinerated ash such as waste, a melting furnace consisting of an open container containing incinerated ash is carried into the facility, and the distance between the tip ends is set to the distance between the other ends. When the tip portions of the plurality of electrodes narrower than the gap are inserted into the incineration ash in the melting furnace to perform electric melting of the incineration ash, and when the front or most of the incineration ash in the melting furnace is melted, A method for treating refuse incineration ash, which comprises carrying out the melting furnace. 2. A facility for melting and treating incinerated ash such as waste, wherein a plurality of electrodes are held so that the interval between the tips is smaller than the interval between the other ends, and the electrodes are held. Holding and adjusting means for adjusting the interval between the electrodes and the position in the vertical direction, a melting furnace of an open container in which the incineration ash is put, and carrying the melting furnace below the electrode or from there. A refuse incineration ash processing device, comprising: a melting furnace transport means for carrying out.