JPH072729U - Debris outlet weir brick in ash melting furnace - Google Patents

Abstract

(57) [Summary] [Object] The present invention provides a slag spout weir brick in an ash melting furnace, which has a long service life. [Structure] The present invention is formed by a total of three bricks including a low-order brick in the center and high-order bricks on both sides that are joined to the low-order brick, and the low-order brick is projected outward from the high-order brick. It is characterized by being formed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a slag spout weir brick in an ash melting furnace. For example, an ash melting furnace is used to treat municipal waste incineration ash. In the ash melting furnace, the ash is heated and melted, and the molten slag is discharged from the outlet and then solidified. A weir brick is fitted into the outlet. The present invention relates to improvement of such a slag mouth weir brick.

[0002]

[Prior art]

 Conventionally, as the slag spout weir brick as described above, an integrally molded product having a substantially concave cross section with a central portion formed lower than both side portions has been used. However, it is difficult to press-mold the conventional slag spout weir bricks in terms of shape, and since it is formed by hand, it is inferior in denseness and is easily eroded by molten slag. . In particular, due to its nature, the erosion of the central part, which is lower than both sides, is severe. In addition, since a bending moment acts due to the thermal expansion of the surrounding furnace body, there is a drawback that cracks are likely to occur in the central part. If molten slag enters this crack, it will be damaged in a short period of time. Furthermore, there is a risk of squeezing out or falling off due to cracks. The conventional slag spout weir brick has a short service life, which often requires a troublesome batch replacement work.

[0003]

[Problems to be solved by the device]

 The problem to be solved by the present invention is that the service life of the conventional brick at the outlet weir is short.

[0004]

[Means for Solving the Problems]

 The present invention, however, is made up of a total of three bricks, the lower brick in the center and the higher bricks on both sides that are joined to the lower brick, and the lower brick projects outward from the higher brick. The present invention relates to a brick at a slag outlet weir in an ash melting furnace.

In the present invention, the slag spout weir brick is formed of a total of three bricks, the lower brick in the center and the higher bricks on both sides joined to the brick. The bricks at the outlet slag are generally concave in cross section. And the lower bricks are projected more outward than the higher bricks. The lower bricks are projected in the molten slag discharge direction more than the higher bricks.

[0006]

[Action]

 The three bricks that make up the slag spout weir bricks are easier to press-form in shape compared to the case of producing a large brick that is integrated with them as in the conventional method, and are therefore more compact, so It is less susceptible to erosion by molten slag than slag mouth bricks. Due to its structure, the lower bricks in the center are more likely to be eroded than the high bricks on both sides, and especially the outer end portions of the lower bricks are more likely to be eroded. The brick is projected to the outside of the high part brick. Moreover, the slag mouth weir brick is divided into three parts, and the bending moment due to the thermal expansion of the surrounding furnace body and the thermal stress due to the temperature difference between the inside and outside of the slag mouth weir brick are hard to work on the central lower brick. Therefore, cracks do not occur in the lower bricks. The slag spout weir ring of the present invention, combined with these, has a long service life.

In order to prolong its service life, it is effective to protect or strengthen the low-grade brick that is most susceptible to erosion due to its property. To protect this, at least the lower surface of the low-grade brick is protected. It is preferable to install a coolable metal case and maintain the temperature at a low temperature, and it is preferable to use Al ₂ O ₃ —SiC—C type bricks from the viewpoint of strengthening the low-order portion bricks from the viewpoint of material. This brick has the characteristics that it is dense and has excellent corrosion resistance.

[0008]

【Example】

 1 is a front view showing an embodiment of the present invention, and FIG. 2 is a plan view showing the same embodiment as FIG. The slag spout weir brick 10 is made up of a total of three bricks, which are a lower brick 11 at the center and high bricks 21 and 31 on both sides joined to the brick. The flat trapezoidal rectangular parallelepiped lower part bricks 11 are sandwiched between the flat trapezoidal rectangular parallelepiped high part bricks 21 and 31. The lower part bricks 11 are located on the left side 11a of the low part bricks 11 on the lower right side. The surface 21a is joined to the right side surface 11b of the lower part brick 11 and the lower left side surface 31a of the higher part brick 31 respectively, and the upper right side surface 21b of the higher part brick 21 and the upper left side surface 31b of the higher part brick 31 are It is formed on an inclined surface that descends toward the lower brick 11. The slag spout weir brick 10 is formed in a generally concave cross section as a whole.

The low-order bricks 11 are projected to the outside of the high-order bricks 21 and 31. In FIG. 2, the upper part is the inside of the furnace and the lower part is the outside of the furnace. Therefore, the low-level bricks 11 are projected in the molten slag discharge direction more than the high-level bricks 21 and 31.

FIG. 3 is a longitudinal sectional view showing another embodiment of the present invention. The mutual relationship between the lower brick 12 in the center and the higher bricks 22 and 32 on both sides joined to it is almost the same as in the case of the slag mouth weir brick 10 shown in FIG. 1 and FIG. In the slag spout weir brick 20 shown in FIG. 3, a metal case 41 for cooling the inside is installed over the entire lower surface of the lower brick 12 and a part of the lower surfaces of the higher bricks 22, 32.

Although not shown in the drawings, the slag spout weir bricks 10 and 20 are made of refractory material such as bricks or auxiliary bricks that form the furnace body in a state where they are fitted into the slag spout of the ash melting furnace. Retained.

[0012]

[Effect of device]

 As is apparent, the present invention described above has an effect that the service life is long, specifically, the service life is three times or more as compared with the conventional integral molding.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a plan view showing the same embodiment as FIG.

FIG. 3 is a vertical sectional view showing another embodiment of the present invention.

[Explanation of symbols]

10, 20 ... Debris gate weir bricks, 11, 12 ... Lower part bricks 21, 22, 31, 32 ... Higher part bricks, 41 ... Metal case

Claims (3)

[Scope of utility model registration request] 1. A brick made of a total of three bricks, a low-rank brick in the center and high-rank bricks on both sides joined to the brick, and the low-rank bricks projecting outward from the high-rank bricks. Debris outlet weir brick in an ash melting furnace. 2. A slag spout weir brick in an ash melting furnace according to claim 1, wherein a coolable metal case is installed on at least the lower surface of the lower brick. 3. The slag spout weir brick in an ash melting furnace according to claim 1 or 2, wherein the lower part brick is an Al ₂ O ₃ —SiC—C type brick.