JP2000356325A - Tapping device of waste melting furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To uniformalize the particle size of water granulated object by specify ing the splashing-down position of the molten object discharged from the tapping gate of a waste melting furnace and by improving dispersing efficiency by the water flow of a water granulating nozzle inside a water granulating pit. SOLUTION: The tapping device of a waste melting furnace is provided with a water granulating tank 4 water granulating molten object S discharged from a waste melting furnace 1 under a tapping gate 2 formed on the side surface of the furnace bottom part of the waste melting furnace 1, a water granulating sluice 3 is arranged to the tapping gate 2 slanting towards the water granulating tank 4, and a vertical sluice 6 is arranged vertically opposing the molten object flow down gate 5 of the water-granulating sluice 3. The molten object S flows down in the shape of thin plate by forming the width of flowing path of the vertical sluice 6 wider than the width of flowing path of the water-granulating sluice 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of subjecting waste such as municipal solid waste and various industrial wastes to pyrolysis and melting processing in a shaft furnace type pyrolysis waste melting furnace and granulating the melt. The present invention relates to a tapping device to be introduced into a water tank.

[0002]

2. Description of the Related Art Wastes include municipal solid wastes, various industrial wastes, intermediates obtained by drying, erasing, crushing, ash and ash after once landfilling. There are landfill waste and sludge containing earth and sand digged up again, and as a method of treating these wastes, the waste is dried and preheated, pyrolyzed, burned and melted in a shaft furnace type pyrolysis waste melting furnace. In addition, there is known a waste melting treatment method for taking out a melt as slag or metal.

[0003] The slag content and the metal content are contained in the melt discharged from the general waste, industrial waste, and the like by thermal decomposition melting treatment. A conventional method for treating a molten material is to flow a molten material discharged from a waste melting furnace into a granulating water tank to simultaneously granulate slag and metal (Japanese Patent Laid-Open No. 57-68).
No. 126). The melt that is thermally decomposed and melted in the waste melting furnace and flows out of the taphole flows down the water granulation trough into the granulated water tank, where it is granulated in the granulated water tank. Is scraped and taken out.

FIG. 2 is a schematic view of a conventional tapping device. In FIG. 2, a gutter-shaped water granulation gutter 3 is provided below a tap hole 2 formed on a side portion of the waste melting furnace 1 so as to be inclined toward a water granulation water tank 4. The granulated water tank 4 is provided with a granulated nozzle 8 for forming a water flow in the granulated water tank 4.

In such a configuration, the waste melting furnace 1
The melt discharged from the tap hole 2 flows through the granulation gutter 3 and falls into the granulation water tank 4, where it is dispersed by the water flow of the granulation nozzle 8.

In a system in which a tap hole of a waste melting furnace is formed at a lower portion, for example, Japanese Unexamined Patent Application Publication No. 11-22948
No., the width direction consists of a gentle upper stream with a curved surface shape and a tapered downstream section, and the flow path has a curved gutter,
It is described that the melt is dropped from the downstream end in a single stream.

[0007]

However, in a conventional inclined water granulation gutter, the amount of the molten material accumulated in the waste melting furnace and the pressure of the molten material discharged from the tap hole due to the change in the furnace pressure vary. The flying distance is different.Especially at the beginning of the molten material, it jumps far beyond the granulated gutter, and the molten material falls down in a thick round bar shape. Without causing large lumps.

[0008] Therefore, the present invention is to improve the dispersion efficiency of the water flow of the water granulation nozzle in the water granulation tank, by making the landing position of the melt discharged from the tap of the waste melting furnace constant and improving the dispersion efficiency. An object of the present invention is to provide a tapping device capable of uniforming particle sizes.

[0009]

SUMMARY OF THE INVENTION According to the present invention, there is provided a tapping apparatus for a waste melting furnace, comprising: a molten material discharged from the waste melting furnace; A water granulation tank for water granulation is arranged, and a water trough is installed at the tap at an angle to the water granulation tank, and a vertical gutter is arranged vertically opposite the molten logistics bottom of the water granulation gutter. It is characterized by having been done. In the above configuration, the width of the flow path of the downspout can be made larger than the width of the flow path of the granulation gutter, so that the melt can be made into a thin plate and flow down.

[0010]

FIG. 1 is a schematic view of a tapping device according to the present invention. In FIG. 1, below a tap hole 2 formed on a side surface of a furnace bottom of a waste melting furnace 1, a downwardly trough-shaped water-granulating gutter 3 is provided to be inclined toward a water-granulation water tank 4. .

A vertical gutter 6 is arranged vertically opposite the lower stream 5 of the granulated gutter 3. A granulated water tank 4 is disposed below the granulated gutter 3 and the downspout 6. The granule 3 and the downspout 6 are surrounded by a hood 7. In the water crushing water tank 4, a water crushing nozzle 8 for forming a water flow is provided.

The downspout 6 is formed such that the flow path on the inner surface is concave and wide in cross section, and has a size larger than the width of the flow path of the granulation gutter 3.
Also, the level of the upper part of the downspout 6 should be such that the melt S spouted from the tap hole 2 does not exceed the upper part of the downpipe 6 and is almost the same level as the level of the tap port 2 of the waste melting furnace 1. Preferably, the lower level of the downspout 6 is located below the level of the molten stream lower port 5 and above the water surface of the granulated water tank 4.

In the above configuration, when the tapping port 2 of the waste melting furnace 1 is opened and the tapping of the molten material S is started, the molten substance S is ejected from the tapping port 2. The flying distance of the melt S discharged from the waste melting furnace 1 varies depending on the change in the amount of the accumulated melt S in the waste melting furnace 1 and the change in the furnace pressure. Flying farther beyond 3, the melt S hits the downspout 6. Since the melt S colliding with the downspout 6 spreads laterally by the wide flow path, the melt S becomes a thin plate from a round bar,
It falls from the lower end of the downspout 6 to the surface of the granulated water tank 4.

When the flight distance of the melt S is reduced, the melt S flows down to the granulation gutter 3 and collides with the downspout 6 to form a thin plate, from the lower end of the downspout to the water surface of the granulation tank 4. Fall.

The melt S is supplied from the lower end of the downspout 6 to the granulated water tank 4.
, It can be landed at a fixed position on the extension of the downspout 6.

The melt S that has fallen into the granulated water tank 4 is dispersed and granulated by the water flow of the granulation nozzle 8. At this time, since the amount of slag falling per unit and the amount of granulated water are uniform,
A granulated product having a uniform diameter can be obtained.

[0017]

According to the present invention, since the molten material collides with the downspout and regulates the flight distance, the landing position on the granulated water tank can be kept constant, so that the particle size of the granulated material is uniform. be able to. Further, by making the molten product into a thin and wide thin plate shape, the dispersion efficiency by water from the granulation nozzle can be improved, and the particle size can be made constant.

[Brief description of the drawings]

FIG. 1 is a schematic view of a tapping device of the present invention.

FIG. 2 is a schematic view of a conventional tapping device.

[Explanation of symbols]

 1: Waste melting furnace 2: Outlet 3: Granulated gutter 4: Granulated water tank 5: Melt logistics bottom 6: Downspout 7: Hood 8: Granulated nozzle S: Melted material

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Takeshi Nakano 46-59, Nakahara, Tobata-ku, Kitakyushu Nippon Steel Plant Design Co., Ltd. F-term (reference) 3K061 AA16 AB03 AC01 DA13 DB11 DB12 DB20

Claims (1)

[Claims] 1. A granulated water tank for granulating melt discharged from a waste melting furnace is disposed below a tap hole formed on a side surface of a furnace bottom of the waste melting furnace, and a water outlet is provided in the tap hole. A tapping device for a waste melting furnace, characterized in that a trough is provided to be inclined toward the water granulation tank, and a vertical trough is arranged vertically to face a lower part of the melt flow of the water granulation gutter.