JPH0849987A - Slag air cooling device for waste melting furnace - Google Patents

Abstract

PURPOSE:To provide a slag air-cooling device which enables the solidifying of a melted slag to be discharged from a waste melting/treating furnace into pellets by cooled air. CONSTITUTION:A melted slag of a waste melting furnace is made to flow out to a carrying surface 6 of a vibration conveyor 3 through which a cooling medium passes to be cooled being conveyed by vibration. The carrying surface 6 is formed in a staircase to blow air for cooling from a stepped wall surface thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slag air cooling device for solidifying molten slag discharged from a waste melting treatment furnace 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 and rapidly cooled to solidify into small blocks before being landfilled. By discarding, there is no risk of heavy metals and other harmful substances being eluted from the waste into the ground,
It has been conventionally attempted to prevent the occurrence of secondary pollution.

[0003]

The solidification method of dropping molten slag into water and quenching it as described above requires a large amount of cooling water, and the treatment of water contaminated by the cooling is a new problem. It was something that In addition, a large amount of fibrous or porous slag is mixed in the water-cooled slag, which weakens the strength of the slag and causes a safety problem in handling the slag.

Therefore, it has been considered that the crucible receives the molten slag and is naturally cooled or air-cooled in the air. However, since it generally takes a long time to cool the air, it is very long for circulating and using the crucible. There is a problem that an endless conveyor is required, equipment cost and space are required, and it is difficult to rapidly cool the molten slag by air cooling, so the slag becomes a large lump and metal is also mixed in the slag. The crushing of massive slag is not easy, and there is a problem that it is difficult to carry out subsequent processes such as transportation, storage, reuse, and landfill.

[0005]

The slag air-cooling device for a waste melting furnace of the present invention is intended to solve the above-mentioned problems.
It is characterized in that the molten slag of the waste melting furnace is caused to flow out to the loading surface of the vibration conveyor in which the cooling medium is circulated, and the slag is cooled while being conveyed by vibration.

Further, the present invention is characterized in that, in the slag air-cooling device for the waste melting furnace, the loading surface of the vibration conveyor is formed in a step shape.

Further, the present invention is characterized in that, in the slag air-cooling device for the waste melting furnace, the loading surface of the vibration conveyor is formed in a stepped shape, and the cooling air is blown out from the step wall surface.

[0008]

By vibrating the slag on the loading surface, contact with the air becomes active, and heat is released from the slag surface into the air in a short time to enable rapid cooling. Further, the loading surface is stepped to increase the surface area, and the cooling air can be blown out from the step wall surface to further enhance the cooling capacity.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the slag air cooling apparatus for a waste melting furnace according to the present invention will be described below with reference to the drawings. FIG. 1 is a partial sectional view of this device, FIG. 2 is its plan view, and FIG. 3 is its left side view. Four coil springs 2 are vertically provided at four corners on the base 1. 3 is a vibration conveyor, and the vibration conveyor 3
Is mounted on the coil spring 2 by supporting pieces 4 which are provided so as to project toward both ends of the coil spring 2 so as to be supported via the coil spring 2. Reference numeral 5 denotes a vibration motor fixedly provided on both side surfaces of the vibration conveyor 3, and by operating the vibration motor 5, the vibration conveyor 3 can be vibrated on the coil spring 2.

The loading surface 6 of the vibrating conveyor 3 is formed stepwise. That is, the upper surface of the vibration conveyor 3 is formed in a staircase shape, and the heat-resistant loading plates 6 are provided on the respective floors 7a to 7g.
The a to 6g are fixed by sandwiching both side edges by the clamp plates 8, and a step is formed between the respective loading plates 6a to 6g to form the loading surface 6 in a stepped shape. The loading plates 6a to 6g are integrally formed on their lower surfaces with protrusions (radiating fins) for promoting cooling. Then, voids 9a to 9g are formed between the lower surfaces of the loading plates 6a to 6g and the floors 7a to 7g, and the air supply hose 11 is arranged from the high pressure air header 10 in each of the voids 9a to 9g and the loading is performed. Nozzle holes 12, 12, 12, which communicate with the respective voids 9a-9g by exposing the front edges of the loading plates 6a-6g on the stepped wall surface of the surface 6.
Are formed between the ridges, and cooling air is pressure-fed from the high-pressure air header 10 to each of the gaps 9a to 9g to cool each of the loading plates 6a to 6g from the lower surface, and at the same time, to cool the cooling air. The nozzle holes 12, 12, 12, ...

Reference numeral 15 is an air header provided above the vibrating conveyor 3, and nozzles 16, 16 for blowing cooling air toward the loading surface 6 are provided at the tip and the lower surface of the air header 15. 16, ... are projected. Also, 17
Is an air header provided in the center of the base 1 below the vibration conveyor 3. The air header 17 has a plurality of nozzles 18, 18, 18, ...
The cooling air is blown from 8, 18, ... To the lower surface of the vibration conveyor 3.

Then, the molten slag of the waste melting furnace (not shown) is transferred from the discharge gutter 20 to the loading plate 6 as shown in FIG.
While flowing out to a, the vibration conveyor 5 is vibrated by the operation of the vibration motor 5, and the vibration violently vibrates the slag on the loading surface to actively contact the air and rapidly cool it to proceed in the direction of the arrow. Let At that time, the loading plates 6a to 6g are cooled by the air flowing through the gaps 9a to 9g, and the air is discharged from the nozzle holes 12, 12, 1.
The air blows out from 2, ... and flows over the upper surfaces of the loading plates 6a to 6g, so that the slag collides with the air flow to enhance the cooling effect, and the air flow causes the slag to float above the loading surface. By floating the slag, heat conduction due to direct contact from the slag to the loading surface is prevented, temperature rise of the loading surface is suppressed, and durability is improved. The slag is composed of nozzles 16, 16, 16, ... And nozzles 18, 18, 18,
It is also air-cooled by the air blown from. Due to such rapid cooling, the molten slag is cracked and gradually solidifies into small particles on the loading surfaces 6b to 6g, and the stairs descend. By thus forming the loading surface 6 in a stepwise manner, the surface area of the loading surface 6 is increased, and the slag can be sequentially dropped from the step and vibrated more violently, so that the cooling capacity can be enhanced.

In the embodiment, the air for cooling the lower surfaces of the loading plates 6a to 6g is directly supplied to the nozzle holes 12, 12, 12 ,.
Although it is made to blow out from the loading plates 6a to 6g, by circulating water as a cooling medium in the loading plates 6a to 6g.
You may make it cool g. In that case, since the cooling water does not come into direct contact with the slag, there is no concern of contamination. Further, the loading surface 6 does not necessarily have to have a downwardly inclined stepped shape as shown in this embodiment. For example, the loading surface 6 may have an upwardly inclined surface so that the slag can move up the inclined surface due to vibration, or a horizontal surface. By adjusting the residence time of the slag on the loading surface 6, solidification may be achieved by a shorter conveyor according to the slag discharge amount.

[0014]

As described above, since the slag air-cooling device according to the present invention cools the slag by vibrating it on the vibrating conveyor, the slag can be rapidly cooled by vigorous contact with the air. It solidifies into small particles due to vibration and rapid cooling, making it easy to handle afterwards, and because cooling and solidification is performed in a short time, the conveyor does not grow in length and installation space is not required, so equipment costs are also reduced. It has a beneficial effect.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional side view showing an embodiment of a slag air cooling device according to the present invention.

FIG. 2 is a plan view of FIG.

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

FIG. 4 is a perspective view of a main part showing a usage state.

[Explanation of symbols]

 1 Base 2 Coil Spring 3 Vibration Conveyor 5 Vibration Motor 6 Loading Surface 6a-6g Loading Plate 9a-9g Void 12 Nozzle Hole 20 Discharge Trough

Claims (3)

[Claims] 1. A waste characterized in that a molten slag of a waste melting furnace is caused to flow out to a loading surface of a vibration conveyor in which a cooling medium is circulated, and the slag is cooled while being conveyed by vibration. Slag air-cooling device for material melting furnace. 2. The slag air cooling device for a waste melting furnace according to claim 1, wherein the loading surface of the vibration conveyor is formed in a step shape. 3. The slag air cooling device for a waste melting furnace according to claim 1, wherein the loading surface of the vibration conveyor is formed in a step shape, and the cooling air is blown out from inside the step wall surface.