JPH0619949Y2 - Industrial waste melting furnace - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a discharge path of industrial waste melted in a high-temperature hearth formed of a carbon-based combustible material, which is horizontally connected to the bottom of the furnace to discharge the waste. The present invention relates to an industrial waste melting furnace in which a slag hood that covers the outside of a passage is provided with a first opening for collecting the slag from the discharge passage under its own weight, and more particularly, to an improvement of the slag portion.

[Conventional technology]

Conventionally, it has been configured to collect the lumps of coke and the like that fly out from the discharge passage as the pressure inside the furnace rises together with the slag from the first opening.

[Problems to be solved by the device]

However, if lumps such as coke are mixed in the slag when commercializing the slag, the product becomes unaesthetically inhomogeneous and has low strength, and there is room for improvement in quality. Therefore, in order to separate the lumps from the slag in which the lumps are mixed, the discharge passage or the downstream side thereof is allowed to pass the slag that is a liquid substance, and a mechanical type that blocks the passage of the lumps that are solid substances. It is conceivable to provide a screen mechanism (for example, JP-A-60-33420).

However, for that purpose, a heating mechanism or the like for preventing clogging and the like due to the solidification of slag in the screen mechanism is required, and there is a drawback that the apparatus becomes a large-scale device in which maintenance costs and equipment costs increase.

An object of the present invention is to collect the lumps that have flown out into the slag hood from the discharge path in a state of being separated from the slag, and to devise a simple and rational structure for that purpose.

[Means for Solving the Problems]

A feature of the present invention is that a discharge passage of industrial waste melted in a high-temperature hearth formed of a carbon-based combustible material is horizontally connected to a bottom of a furnace, and a slag from the discharge passage is provided downstream of the discharge passage. And a space for allowing the lumps to naturally fall, and a first opening for collecting slag on the upper side and a second opening for collecting the lumps on the lower side are juxtaposed in the space in which the slag and the lumps flow out. There are the following points, and the effects thereof are as follows.

[Action]

In other words, both the slag and the lumps discharged from the discharge path naturally fall in the space on the downstream side due to their own weight, but the lumps of coke and the like discharged from the discharge path at this time considerably increase as the pressure in the furnace increases. Since it jumps out with a large initial velocity, the parabolic drop locus drawn by these lumps shifts further downstream than the parabolic drop locus drawn by the slag, which is a highly viscous liquid.

Therefore, if the first opening is arranged on the upper side and the second opening is arranged on the lower side in the direction in which the slag and the agglomerates in the space are projected, the slag is collected at the first opening and the downstream side of the first opening. The lumps are collected at the second opening of.

Therefore, the slag hood has a very simple structure in which the second opening for collecting lumps in addition to the first opening for collecting slag is added to the slag hood. Can be collected.

When the rate of coke mixed in the slag was examined in an experiment, it was found that the above-mentioned conventional technique was about 3% by weight, but according to the present invention, it can be greatly reduced to 0.5% by weight or less.

[Effect of device]

As a result, when slag is used for construction materials, civil engineering materials, and other products, high quality products with good aesthetics, high homogeneity and high strength due to the reduced amount of foreign matter such as coke are added, and maintenance costs and equipment costs increase. It is possible to obtain it simply by providing an extremely simple sorting mechanism without using a special device.In addition, the collected lumps of coke and the like can be reused for forming the high-temperature hearth to save energy and resources. Therefore, the facility cost can be reduced, and as a whole, a high temperature hearth type industrial waste melting furnace can be provided which is much more excellent in slag quality improvement and cost.

〔Example〕

 Next, an embodiment will be described with reference to FIGS. 1 and 2.

A hopper (2) for injecting industrial waste and carbonaceous combustible substances is connected to the vertical middle position of the vertical furnace (1) through a double damper (3), and a furnace with a water cooling jacket (1a) is connected. Inside the lower part, the high temperature hearth was filled with carbonaceous combustible substances from the hopper (2).
(A) is formed, and a packed bed (B) of industrial waste is formed above the high-temperature hearth (A). Nozzle that supplies combustion air from the air supply blower (4) to the high temperature hearth (A)
(5) and an ignition burner (7) are attached to the lower part of the furnace.

The upper part of the furnace (1) is the flue gas ascending channel (8), and the lower part of the ascending channel (8) has the tuyere (9) for supplying air from the air supply blower (4) for post combustion. The ascending flow path (8) is connected to the dust collecting sancron (10) and the exhaust blower (16) by the duct (11).

Connect the molten waste discharge path (12) to the bottom of the furnace sideways,
The lid (13), which is configured to collect the industrial waste melted in the high-temperature hearth (A) and opens the bottom of the furnace,
It is provided so that it can be opened and closed with the jackie (15) attached to 4).

A filler (6) that fills the space between the lid (13) and the water cooling jacket (1a) to form the bottom of the furnace is provided, and the bottom of the furnace is sealed and heat-insulated, and the bottom of the furnace is connected to the discharge passage (12). The bottom surface is an inclined surface that smoothly connects to allow the molten slag to flow out smoothly.

A tubular body (18) with a water cooling jacket lined with a refractory material (17) for forming the discharge passage (12) is detachably fitted to the lower part of the furnace and bolted at the flange portion (19) to form the outlet. It is intended to improve the durability of the cassette and the repairability by exchanging the cassette.

The slag hood (20) covering the outside of the discharge passage (12) is detachably bolted to the lower part of the furnace at the flange part (19), and the slag from the discharge passage (12) is connected to the slag hood (20). The slag in the space is provided with a first opening (21) for spontaneously flowing down and collecting in the downstream of the internal space, and a second opening (22) for dropping and collecting lumps that fly further downstream from the slag from the discharge path (12). And the first opening (21) on the upper side and the second opening (2 on the lower side in the protruding direction of the lump.
By arranging in parallel with the slag hood (20) so that 2) is located, by utilizing the difference in the falling position from the discharge path (12) of the slag and the lump to the downstream side, the slag and the lump are separated. It is configured to be collected separately.

The slag recovery device (23) is connected to the first opening (21) by the duct (24), the lump recovery device (25) is connected to the second opening (22) by the duct (26), and the slag hood (20 ) The exhaust pipe (27) connected to the outlet hood (20) is connected to the exhaust blower (16) so that the inflow of outside air into the inside can be suppressed, and the hot gas in the furnace is discharged from the outlet hood (20).
Is sent to the exhaust pipe (27) to maintain the inside of the slag hood (20) at a high temperature sufficient to suppress slag hardening.
Further, a refractory material (28) for heat insulation is lined inside the slag hood (20) to ensure more sufficient heat retention.

Shoot part (2) that receives the lumps in the slag hood (20)
9) is cooled with a water cooling jacket to improve the durability of the slag hood (20).

The slag recovery device (23) cools the slag with air,
Alternatively, the slag is rapidly cooled with water, and the lump recovery device (25) is a water-cooled type or an air-cooled type.

It is important to properly set the width ₁ of the first opening (21) and the level difference ₂ between the discharge passage (12) and the first opening (21) in order to make the separation of the slag and the lumps good, and in general, ₁ is about 90 to 200 mm, and ₂ is about 65 to 150 mm.

[Another embodiment]

 Next, another embodiment will be described.

Industrial wastes input from the hopper (2) are, for example, various industrial wastes such as sewage sludge, tire scraps, municipal waste incineration ash, and waste catalysts or intermediate processed products thereof, and carbon-based combustible substances are, for example, , Coke, briquettes such as anthracite, and graphite electrode scraps.

The concrete structure of the slag portion can be appropriately changed. For example, as shown in FIG. 3, the slag hood (20) is configured to be opened to the outside at the first opening (21) and the second opening (22). Then, the means for supplying the high temperature gas in the furnace is eliminated, or the chute portion (29) with a water cooling jacket for the lump is formed so as to be slidable and fixable so that ₁ and ₂ can be adjusted appropriately.

The application of slag is not questioned, for example, interlocking blocks, water-permeable blocks, terrazzo tile, concrete fine aggregate, construction materials such as decorative blocks, roadbed materials, roadbed materials, sand drain materials, materials for civil engineering such as backfill materials, Other available.

It should be noted that reference numerals are added to the claims of the utility model for convenience of comparison with the drawings, but the present invention is not limited to the structure of the accompanying drawings by the entry.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention, FIG. 1 is an overall conceptual view, and FIG. 2 is a detailed view of essential parts. FIG. 3 is a detailed view of essential parts showing another embodiment of the present invention. (12) …… Discharge path, (20) …… Slag hood, (21) …… First opening, (22) …… Second opening.

Claims (1)

[Scope of utility model registration request] 1. A discharge passage (12) of industrial waste melted in a high-temperature hearth formed of a carbon-based combustible substance is horizontally connected to the bottom of the furnace and is discharged to the downstream side of the discharge passage (12). Provide a space for the slag and aggregates from the road (12) to fall naturally,
Industrial waste in which a first opening (21) for collecting slag on the upper side and a second opening (22) for collecting lumps on the lower side are arranged side by side in the direction in which the slag and the lump in the space are projected. Melting furnace.