JPH0527029U - Molten slag water granulator - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention can prevent molten slag, water granules, dust and the like from adhering or sticking to the inner surface of the enclosure.
The present invention provides a water granulation device for molten slag. According to the present invention, a space between a molten slag discharge port opened in a melting furnace and a water tank arranged below is surrounded by an enclosure, and a spray nozzle for water granulation is attached to the enclosure. It is characterized in that the inner surface of the enclosure is covered with a plate material made of carbon or silicon carbide.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a water granulation device for molten slag. A melting furnace that melts with arc heat is used to treat municipal solid waste, industrial waste, sludge, and incinerator ash. In the melting furnace, molten slag is generated by the melting treatment of the incineration ash and the like, and the molten slag is discharged from a molten slag discharge port provided in the melting furnace. Since the discharged molten slag cannot be handled as it is, the molten slag is water granulated, and the granulated material is received in the water tank arranged below. The present invention relates to an improvement of such a water slag granulating device.

[0002]

[Prior Art]

 Conventionally, as an apparatus for water granulation of molten slag, an iron enclosure surrounds a molten slag discharge port opened in a melting furnace and a water tank arranged below it, and the enclosure is sprayed for water granulation. The one in which the nozzle is attached is used. This conventional device is to granulate the molten slag discharged from the molten slag discharge port by spraying water from the spray nozzle for granulation, and receive the granulated product in the lower water tank. It has also been proposed that a crushing spray nozzle is variably attached so that the spray angle of water can be adjusted within a depression angle range of 0 to 45 degrees (JP-A-62-171949).

However, the conventional apparatus as described above has a drawback in that molten slag, water granules, dust, and the like adhere to or adhere to the inner surface of the enclosure, and these grow with time. If such adhesion, sticking and further growth are left as they are, smooth water slag water breakage is hindered, which in turn hinders smooth melt slag discharge.

[0004]

[Problems to be solved by the device]

 The problem to be solved by the present invention is that, in the conventional apparatus, molten slag, water granules, dust, and the like adhere to or adhere to the inner surface of the enclosure, and these grow with time.

[0005]

[Means for Solving the Problems]

 In the present invention, however, the molten slag discharge port opened in the melting furnace and the water tank disposed therebelow are surrounded by an enclosure, and a spray nozzle for water granulation is attached to the enclosure. In addition, the present invention relates to a water granulating device for molten slag, characterized in that the inner surface of the enclosure is coated with a plate material made of carbon or silicon carbide.

An important point in the present invention is that a plate material made of carbon or silicon carbide is coated on the inner surface of the enclosure surrounding the molten slag discharge port and the water tank. The plate material may be coated on the entire inner surface of the enclosure, or may be coated on a part of the inner surface. In the case of coating a part of the inner surface, the plate material is attached to at least the enclosure. It is preferable that the plate material is covered from the water spray nozzle for water spraying up to the water surface of the water tank disposed below.

[0007]

[Action]

 According to the present invention, since the inner surface of the iron enclosure is usually covered with a plate made of carbon or silicon carbide, molten slag, its granules, dust, etc. adhere to the plate and thus the inner surface of the enclosure. It is possible to prevent sticking. In this case, it is preferable to form a water curtain along the plate material, and as the angle of the water spray from the spray nozzle for water granulation becomes closer to horizontal, the molten slag is solidified as if the water flow hits the water flow. Since the coarse slag that has been generated and the tendency to grow become stronger, in order to prevent the generation and growth of such coarse slag, the angle of the water spray should be in the range of a depression angle of 45 to 80 degrees. It is preferable to install a water spraying nozzle so that the spray is directed to the water surface in the water tank inside the enclosure.

[0008]

【Example】

 1 is a vertical sectional view schematically showing an embodiment of the present invention, and FIG. 2 is a partially enlarged view of FIG. A furnace lid 21 is openably and closably attached to the furnace body 11, and refractory materials 31 and 32 are lined therein. The furnace lid 21 is provided with an inlet 22 and an outlet 23 for incineration ash and the like, and an electrode 24 is attached thereto. A molten slag discharge port 12 is opened on the side wall of the furnace body 11, molten metal A is generated in the lower layer and molten slag B is generated in the upper layer in the furnace, and further incinerated on the upper portion of the molten slag B. C such as ash is floating.

A water tank 41 is arranged below the molten slag discharge port 12, and an iron enclosure 51 surrounds the molten slag discharge port 12 and the water tank 41. The inner surface of the enclosure 51 is covered with a carbon plate 61 over the entire four side surfaces thereof, and a spray nozzle 71 for water granulation is installed on the side surface of the enclosure 51 located in the direction of the molten slag discharge port 12. A common water curtain spray nozzle 72 is attached to the other three sides of the enclosure 51.

In the illustrated embodiment, the water spray nozzle 71 has a large-diameter hole 71a and a small-diameter hole 71b formed in a slit shape, and the depression angle from the large-diameter hole 71a is about 60 degrees. In the direction of the molten slag discharge port 12 of the plate 61 by spraying water toward the water surface of the water tank 41 inside the enclosure 51 to granulate the molten slag B, and spraying water from the small-diameter hole 71b. A water curtain is formed along the inner surface of the side surface located at. The spray nozzle 72 for the water curtain has only small holes having the same diameter, and water is sprayed through these small holes to form a water curtain along the inner surfaces of the other three side surfaces of the plate member 61. It has become.

In the illustrated embodiment, the water spray nozzle 71 is mounted only on the side surface of the enclosure 51 which is located in the direction of the molten slag discharge port 12, but it can also be mounted on other side surfaces. .. Further, the water spraying nozzle 71 is also installed as a spray nozzle for the water curtain, but it is also possible to install a dedicated water spraying nozzle and a dedicated water curtain spray nozzle separately.

Water is stored in the water tank 41, an inclined plate 42 is provided in an extension direction of the enclosure 51, and an inner surface of the inclined plate 42 is also covered with a carbon plate material 62, so that the deepest portion is formed. Is equipped with a conveyor 43.

By utilizing the arc generated by energizing the electrode 24, the incineration ash C etc. continuously charged into the furnace from the charging port 22 is melted. The molten slag B generated by the melting process falls from the molten slag discharge port 12 inside the envelope body 51 by its own weight, and in the process, the water from the large diameter hole 71a formed in the water spray nozzle 71 is sprayed. The water is granulated with a spray to form granules D. At this time, the inner surface of the enclosure 51 is covered with a carbon plate 61 over the entire four side surfaces thereof, and in the case of FIG. 1, a water curtain is formed on the inner surface of the plate 61, and a large diameter The water spray from the holes 71a has a depression angle of about 60 degrees and is directed toward the water surface of the water tank 41 inside the enclosure 51, and the phenomenon that the molten slag B does not impinge on the water flow does not occur. The granulated material D, dust, etc. never adhere to or adhere to the inner surface of the plate material 61, and coarse slag does not occur or grow at all.

The granulated product D thus granulated falls down to the water tank 41 by its own weight while being guided by the carbon plate member 61 coated on the inner surface of the enclosure 51, and is further covered on the inner surface of the inclined plate 42. While being guided by the carbon-made plate material 62, it falls to the conveyor 43 by its own weight and is taken out to the outside by the conveyor 43.

[0015]

[Effect of the device]

 As is apparent, the present invention described above has an effect of preventing molten slag, its water granules, dust and the like from adhering or sticking to the inner surface of the enclosure.

[Brief description of drawings]

FIG. 1 is a vertical sectional view schematically showing an embodiment of the present invention.

FIG. 2 is a partially enlarged view of FIG.

[Explanation of symbols]

11 ... Furnace body, 12 ... Molten slag discharge port, 21
... Furnace lid, 22 ... Input port, 23 ... Exhaust port, 2
4 ... Electrode, 41 ... Water tank, 51 ... Enclosure, 6
1 ... Carbon plate material, 71 ... Spray nozzle for water granulation, 72 ... Spray nozzle for water curtain, A ...
Molten metal, B ... Molten slag, C ... Incinerated ash, etc.
D: Granulated product

Claims (4)

[Scope of utility model registration request] 1. A surrounding body is surrounded by a molten slag discharge port opened in a melting furnace and a water tank arranged below, and the surrounding body is equipped with a spray nozzle for water granulation. A device for granulating molten slag, characterized in that an inner surface of the enclosure is covered with a plate material made of carbon or silicon carbide. 2. The apparatus for water granulating molten slag according to claim 1, wherein a water curtain is formed along the plate material. 3. The water slag water granulation device according to claim 1, wherein the water slag spray nozzle is attached so that water is sprayed at an angle of depression of 45 to 80 degrees. 4. The apparatus for water granulation of molten slag according to claim 1, 2 or 3, wherein a spray nozzle for water granulation is attached so that water is sprayed toward the water surface in the water tank inside the enclosure.