JPH07318264A - Molten slag air cooling and solidifying device - Google Patents

Abstract

PURPOSE:To provide a device capable of solidifying molten slag discharged from a waste melting and processing furnace into small blocks through air cooling so as to facilitate a reutilization of solidified item and eliminate cooling water. CONSTITUTION:There is provided a conveyor in which a plurality of shallow pans 8 are set adjacent to each other from an upper horizontal path for going to a lower horizontal path for returning so as to be continuously arranged, and each of the pans is circulated while its upward horizontal position being kept from the horizontal path for going to the horizontal path for returning. The horizontal going-path of the conveyor is provided with a discharging port 20 of a waste melting and processing furnace for dropping the molten slag 21 into the pans 8 is installed in the horizontal going-path of the conveyor. In addition, there is provided a reversing mechanism 25 for reversing the pans 8 and discharging the solidified material of the molten slag 21 solidified in the pans 8 in the horizontal returning-path of the conveyor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for solidifying molten slag discharged from a waste melting treatment furnace into small pieces by air cooling.

[0002]

2. Description of the Related Art Wastes such as municipal waste incineration residue and sludge incineration residue are melted in an arc type melting treatment furnace, and the molten slag is dropped into a water tank, rapidly cooled and solidified into small lumps, and then landfilled for disposal. Thus, it has been conventionally attempted to prevent the occurrence of secondary pollution by eliminating the risk that heavy metals and other harmful substances will be eluted into the ground from the waste.

[0003]

In the treatment method described above, the molten slag discharged from the melting treatment furnace is solidified by dropping it into water and rapidly cooling it. Therefore, a large amount of cooling water was required, and the treatment of water contaminated by the cooling was a new problem. Further, since the water-cooled slag tends to be fibrous or porous, the mechanical strength of the slag is weakened, the application is limited, and there are problems such as requiring careful handling.

Therefore, it has been considered to cool the molten slag by air cooling, but a large space is required to cool and solidify the high temperature molten slag, and it is difficult to rapidly cool the molten slag by ordinary air cooling. For this reason, it is not easy to crush the large solidified product because a large lumpy solidified product is formed and the metal is mixed in the slag. Therefore, subsequent transportation, storage, reuse, landfill, etc. There was the problem of making it difficult.

[0005]

The molten slag air-cooling and solidifying apparatus of the present invention is intended to solve the above-mentioned problems. A plurality of shallow pan-shaped pans are provided from the upper horizontal forward path to the lower horizontal backward path. A conveyor is provided that is adjacent to each other and continuously circulates the pans from the horizontal forward path to the horizontal backward path while maintaining an upward horizontal posture, and melted slag flows into the pan on the horizontal forward path of the conveyor. In addition to providing a discharge port of the waste melting treatment furnace, a horizontal reversing path of the conveyor is provided with a reversing mechanism for reversing the pan and discharging the solidified product of the molten slag solidified in the pan. And

Further, in the above-mentioned molten slag air-cooling and solidifying apparatus of the present invention, when the discharge port of the waste melting treatment furnace is provided in the horizontal forward path of the conveyor, when the gap between adjacent pans passes through the position where the molten slag flows down, It is characterized in that the pan of the horizontal backward path is set to pass in the opposite direction in the upward posture just below the gap.

Further, the present invention is characterized in that, in the above-mentioned molten slag air-cooling and solidifying device, each pan is supported in a cantilever manner on a chain of a conveyor via a spindle.

[0008]

The molten slag that has flowed down into the pan can be cooled during horizontal travel and horizontal travel, and during that time the heat required for solidification can be released.

Further, the molten slag flowing down from the discharge port is received by the pan of the horizontal return path without spilling out of the pan through the gap. Further, since the bread is supported in a cantilever manner, it is possible to prevent the molten slag from hanging on the conveyor chain.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the molten slag air-cooling and solidifying apparatus according to the present invention will be described below with reference to the drawings. In the figure, 1 is an endless chain of a conveyor that circulates in the direction of the arrow, 2,
3 is a sprocket around which the chain 1 is wound.
As shown in FIG. 3, the sprocket 2 is fixed to the tip of a rotary shaft 5 supported by bearings 4 and 4, and the rotary shaft 5 is rotationally driven at a constant speed in the direction of the arrow by a motor (not shown). It

Bearings 6 are provided at regular intervals on the outer peripheral surface of the chain 1, and support shafts 7 are rotatably supported on the bearings 6, respectively, and a pan 8 is cantilevered and supported on one end of the support shaft 7. ing.
A hook-shaped attitude control piece 9 is integrally formed at the other end of the support shaft 7. Further, 10 is a weight receiving piece fixed between the bearing 6 of the support shaft 7 and the pan 8, and 11 is a weight receiving rail provided parallel to the chain 1 for sliding the weight receiving piece 10. Is.

Reference numeral 12 denotes a rotary shaft rotatably supported by a bearing 13 so as to be eccentrically slightly above the rotary shaft 5 and has an attitude control disk 14 fixed to the rotary shaft 12. Transmission sprocket 1 fixed to one end of 12
5 and the transmission sprocket 16 fixed to one end of the rotary shaft 5, the endless chain 17 is wound around, and the rotation of the rotary shaft 5 is transmitted to the rotary shaft 12 through the endless chain 17, and the sprocket 2 and the rotary shaft 12 and 12 rotate in synchronization.
A receiving and supporting piece 18 that abuts the attitude control piece 9 is provided on the outer peripheral portion of one surface of the rotary shaft 12 so as to project therefrom. As with the sprocket 2, the other sprocket 3 is also provided with a posture controlling disc 14 and the like.

Reference numeral 20 denotes a molten slag discharge port of the waste melting treatment furnace 23. The molten slag 21 is discharged from the discharge port 20 in a fixed amount and flows down into the pan 8 located on the horizontal forward path of the conveyor.

Numeral 25 is a reversing mechanism provided on the horizontal return path below the conveyor. The reversing mechanism 25 locally removes the weight receiving rail 11 and the weight receiving piece 10 is provided on the advancing side thereof. A curved guide rail 26 is provided for putting the weight on the weight receiving rail 11 again.

As shown in FIG. 2, the molten slag discharge port 20 has a pan 8 of a horizontal return path immediately below the gap g when the gap g between the adjacent pans 8 passes in a horizontal parallel path thereunder. The flow-down position of the molten slag 21 is set so that the molten slag 21 passes upward in the opposite direction, and the molten slag 21 spilled from the gap g is received by the lower pan 8 passing through the horizontal backward path. .

In this device, however, when the pan 8 moves in the directions of the arrows on the horizontal forward path and the horizontal backward path due to the circular rotation of the chain 1, the weight receiving piece 10 is brought into sliding contact with the weight receiving rail 11. The horizontal position of the pan 8 is maintained at a high level, and the molten slag 2 that has flowed into the pan 8 from the discharge port 20.
Can hold 1. Then, when the pan 8 reaches the extreme end of the horizontal forward path, the receiving / supporting piece 18 provided on the attitude control disk 14 that rotates in synchronization with the sprocket 2 contacts the attitude control piece 9 and, as shown in FIG. The abutting state continues until the chain 1 makes a U-turn on the sprocket 2 and keeps the pan 8 in a horizontal upward posture all the while. Therefore, the molten slag 21 stored in the pan 8 is air-cooled without spilling even when making a U-turn from the upper horizontal forward path to the lower horizontal backward path, and the necessary heat radiation time is obtained and solidified.

The pan 8 moving to the side of the conveyor
An air-cooling fan (not shown) is provided for blowing cold air toward. Further, the cooling rate can be increased by providing a fin for heat dissipation on the outer surface of the pan 8.

The solidified product thus formed in the pan 8 is discharged by the pan 8 reaching the reversing mechanism 25 and reversing it, and the empty pan 8 circulates through the sprocket 3 again to the upper horizontal forward path. And the molten slag 21 is poured from the discharge port 20. Before the molten slag 21 is poured into the pan 8 again, the heat of the pan 8 may be prevented by cooling the pan 8 by spraying cooling water into the pan 8 in the form of mist. In that case, only a small amount of cooling water is required and there is no risk of water contamination.

Each pan 8 is attached to the conveyor chain by the support shaft 7.
Since it is supported in a cantilevered manner via the slag, as shown in FIG. 5, the chain 1 can be arranged so as to be located away from the processing furnace 23. Therefore, the molten slag 21 spilled from the discharge port 20 is It is possible to eliminate the possibility that the chain 1 may adhere to the chain 1 to cause malfunction. In addition, as shown in FIG. 5, the side wall of the pan 8 opposite to the chain 1 is set lower than the other side wall, so that even if the molten slag 21 is poured into the pan 8 excessively, the excess will not occur. The molten slag 21 is a processing furnace 23
Side to the side and not to the side of the chain 1 to protect the conveyor mechanism from the molten slag 21.

[0020]

As described above, the molten slag air-cooling and solidifying apparatus of the present invention keeps the pan for dropping the molten slag in the upward horizontal position from the horizontal forward path to the horizontal backward path, and cools the molten slag in the meantime. Because of this, the pans circulate in the upper and lower stages, occupying less space, and efficient cooling is possible. Therefore, the heat of the bread can be prevented from being stored and the molten slag can be rapidly cooled, so that it is also possible to cause cracks in the solidified product, and small solid or granular solidified product can be easily obtained, and the solidified product can be transported. , It has a beneficial effect such as facilitating reuse such as storage, magnetic separation, or landfill. Further, there is an advantage that solid slag having a solid grain shape can be obtained without generating fibrous or porous slag like water cooling and handling is easy.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part showing an embodiment of a molten slag air-cooling and solidifying device according to the present invention.

FIG. 2 is a vertical cross-sectional view showing an embodiment of a molten slag air-cooling and solidifying device according to the present invention.

3 is a sectional view taken along the line AA of FIG.

FIG. 4 is a view taken along the line BB of FIG.

FIG. 5 is a cross-sectional view showing an arrangement example of a waste melting treatment furnace and a molten slag air-cooling solidification device.

[Explanation of symbols]

 1 chain 2, 3 sprocket 7 spindle 8 pan 9 attitude control piece 10 weight receiving piece 11 weight receiving rail 14 attitude control disk 20 discharge port 21 molten slag 23 waste melting processing furnace 25 reversing mechanism g gap

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location C04B 5/00 ZAB B

Claims (3)

[Claims] 1. A plurality of shallow pan-shaped pans are continuously arranged adjacent to each other from an upper horizontal forward path to a lower horizontal backward path, and each pan is horizontally directed upward from the horizontal forward path to the horizontal backward path. A conveyor that circulates while maintaining the posture is provided, a discharge port of the waste melting treatment furnace that flows the molten slag into the pan is provided in the horizontal forward path of the conveyor, and the pan is inverted in the horizontal return path of the conveyor. A molten slag air-cooling solidification device, characterized by comprising a reversing mechanism for discharging the solidified product of the molten slag solidified in the pan. 2. When a discharge port of a waste melting furnace is provided on a horizontal forward path of a conveyor, when a gap between adjacent breads passes through a position where the molten slag flows down, a pan on a horizontal return passage is located just below the gap. The apparatus for air-cooling and solidifying molten slag according to claim 1, wherein the apparatus is set so as to pass in opposite directions in a facing posture. 3. The molten slag air-cooling and solidifying device according to claim 1, wherein each of the breads is supported by a chain of a conveyor in a cantilever manner via a support shaft.