JP2563087Y2 - Hot air stove checker brick - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION This invention relates to the improvement of a checker brick for storing heat in a hot blast stove for producing hot air to be sent to a blast furnace. .

[0002]

2. Description of the Related Art A hot blast stove is used to heat air required for burning coke in a blast furnace.
The air is heated and heated to 0 to 1300 ° C.

This hot blast stove comprises, for example, as shown in FIG. 5, a combustion chamber 1 and a heat storage chamber 2. Usually, three or four blast furnaces are provided for one blast furnace. The gas 3 is burned and led to the heat storage chamber 2, and the combustion heat is stored in the heat storage brick 4, and then the air 5 sent from the blower blower is passed through the stored heat storage chamber 2 to exchange heat with the heat storage brick to generate hot air. Is repeated and hot air is continuously blown to the blast furnace.

[0004] The heat storage brick 4 filled in the heat storage chamber 2 of such a hot stove is called a checker brick, for example, as shown in FIG. Are formed in a fixed arrangement as the gas flow path 6, and are formed by forming a convex portion 7 so as to protrude from the upper surface around a predetermined gas flow channel 6 and forming a concave portion corresponding to the lower surface. .

As shown in FIGS. 7 and 8, such checker bricks 4 are arranged so that adjacent checker bricks 4 are closely contacted without gaps, and the concave and convex portions 7 are engaged with each other at the top and bottom. The heat storage chamber 2 is filled with the gas passages 6 of the checkered bricks 4 communicating with each other so as to form one gas passage vertically.

[0006]

In such a hot blast stove, a dirty gas flows, and a gas at least partially contaminated due to a drift or the like flows.
Dust adheres and grows when used for a long time,
The gas passage 6 may be blocked due to partial melting of the brick due to local heating, inflow of foreign matter, etc., and one of the many checker bricks 4 stacked vertically. If the gas flow path 6 becomes blocked, there is a problem that the entire gas flow path over the entire height of the heat storage chamber 2 communicating with the gas flow path 6 cannot be used for heat storage.

The present invention has been made in view of the above-mentioned problems of the prior art, and even if a blockage occurs in one place of the checker brick, one gas flow path is used to store heat over the entire height of the heat storage chamber. An object of the present invention is to provide a checker brick of a hot blast stove capable of efficiently storing heat without becoming unusable.

[0008]

In order to solve the above-mentioned problems, a checker brick of a hot blast stove according to the present invention has a hot blast stove in which a large number of gas passages are formed and the gas passages are stacked so as to communicate with each other. In a checker brick of a furnace, a bypass flow passage is formed around at least one of the upper and lower surfaces of the checker brick and adjacent gas flow passages are communicated with each other.

[0009]

According to the checker brick of this hot blast stove, a bypass flow path is formed around at least one of the upper and lower surfaces of each checker brick to communicate adjacent gas flow paths. Due to the arrangement of the gas passages of the checker brick, the gas passages are connected to the adjacent gas passages by the bypass passage at every fixed stage, and even if a blockage occurs in the gas passage, that part is bypassed. As a result, the gas can be caused to flow, so that the entire hot blast stove can store heat in almost the same state as before the blockage.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an external perspective view of one embodiment of the checker brick of the hot blast stove of the present invention.

The checker brick 10 of this hot blast stove has a brick body 11 formed, for example, in the shape of a hexagonal prism, like the checker brick already described, and this brick has a center of the main body 11 and a concentric angle of a predetermined angle from the center. Six holes are formed through the upper and lower portions to form a total of seven gas channels 12, and this brick has a 1/3 circular or semicircular shape at the apex of the hexagon of the main body 11 and in the middle of each side. Holes are formed penetrating vertically, and a total of 12 gas flow paths 12 are formed.
There is.

The brick main body 11 is placed at every other six gas flow paths 12 at a fixed angle from the center of the brick main body 11.
3 is formed so as to protrude from the upper surface of the mesh, and the concave portion 14 for meshing is also formed on the lower surface thereof (FIG. 3).
Reference) is formed.

Further, the checker brick 10 has a bypass passage 15 on the lower surface of the brick main body 11 so as to communicate twelve semicircular gas passages 12 disposed therearound with adjacent gas passages 12. For example, it is formed so that the corners of the sides of the hexagon are shaved off to a quarter circular cross section.

As described above, the checker bricks 10 having the bypass flow passages 15 are arranged in such a manner that the checker bricks 10 adjacent to each other in the same plane are closely contacted with no gap and are also vertically convex. The portions 13 and the recesses 14 are engaged with each other, and the upper and lower checker bricks 10 are stacked so as not to be in the same position (lapping), and are stacked up to a predetermined height of the heat storage chamber 2 of the hot blast stove.

When the checker bricks 10 having the bypass passages 15 formed as described above are stacked, FIG. 2 shows an arrangement of the bypass passages 15 in a planar state, and FIG.
As shown in the A-A cross section in the middle, the gas passages 12 of the checker bricks 10 in the entire vertical direction of the heat storage chamber 2 of the hot blast stove communicate with each other so as to form one gas passage, and each checker brick 10 A bypass flow path 15 is located around the gas flow path and communicates with the adjacent gas flow path 12. In addition, each time the checker bricks 10 have the gas passages 12 inside the brick main body 11, the bypass passages 15 communicate with the adjacent gas passages 12 every time the gas passages 12 are stacked by lapping.

On the other hand, in a hot blast stove, a dirty gas flows, a gas at least partially contaminated due to a drift or the like flows, a dust or the like adheres and grows after long use, and The gas flow path 12 of the checker brick 10 may be blocked due to melting of a part of the brick due to excessive heating, inflow of foreign matter, and the like.

Considering, for example, the case where one gas flow path 12 of the checker brick 10 is blocked by dust or the like as shown in FIG. Since the gas 3 or the air 5 flows, the entire one gas flow path 12 communicating with the upper and lower portions of the closed portion 16 does not become unavailable for heat storage. Only by disabling the gas passages 12 for several stages, it is possible to maintain a heat storage function substantially the same as before the blockage.

The gas flow path 1 of the checker brick 10
Even if the blocking portion 16 is formed in the fuel cell 2, no operation is particularly required from the outside, and the fuel gas or the air flows automatically by bypassing the blocking portion 16.

Next, another embodiment of the hot blast stove using the checker brick 10 will be described with reference to FIG.

In this hot blast stove, the checker brick 10 having the bypass flow path 15 is used for the entire height of the heat storage body of the heat storage chamber 2 without stacking, and the total height of the heat storage body is divided into a plurality of parts. Bypass passage 15 only in a few stages
A high quality checker brick 10 having the above-mentioned structure is used, and the other portions use a checker brick having no conventional bypass flow passage.

By doing so, the checker brick 1
By providing the bypass flow path 15 at 0, the area of the flat portion of the checker brick 10 is reduced, and even if the surface pressure is increased, by using a high-quality brick in this portion, it is possible to sufficiently withstand the surface pressure, As in the case of the hot blast stove described above, it is possible to automatically cope with the blockage of the gas flow path 12.

In the above embodiment, the bypass channel is formed only on the lower surface of the checker brick. However, the present invention is not limited to this, and the bypass channel may be formed on the upper and lower surfaces or only on the upper surface. .

Although the shape of the bypass flow path is a quarter-circular cross section, the shape is not limited to this, and the cross section may be a triangular cross section with chamfered corners of a checker brick or another cross section such as a polygon.

Further, the present invention is not limited to the above-described embodiment, and each component may be changed without changing the gist of the present invention.

[0025]

According to the checker brick of the hot blast stove of the present invention, as described above in detail with the embodiment,
Since at least one of the upper and lower surfaces of each checker brick is formed with a bypass flow passage communicating with adjacent gas flow passages, the gas flow passages are connected to the adjacent gas flow passages every predetermined stage. Is connected to the bypass flow path, so that even if a blockage occurs in the gas flow path, the gas can flow by bypassing that part, and the hot blast stove is almost in the same state as before the blockage Can be stored.

[Brief description of the drawings]

FIG. 1 is an external perspective view of one embodiment of a checker brick of a hot blast stove of the present invention.

FIG. 2 is a plan view of the bypass channel in a planar state of one embodiment of the checker brick of the hot blast stove of the present invention.

FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2 of one embodiment of the checker brick of the hot blast stove of the present invention.

FIG. 4 is a longitudinal sectional view of another hot stove using the checker brick of the hot stove according to the present invention.

FIG. 5 is a vertical sectional view of a hot stove as an example to which the present invention is applied.

FIG. 6 is an external perspective view of a conventional checker brick.

FIG. 7 is a plan view of the checker brick in a wrapped state.

FIG. 8 is a plan view of the gas flow path of the checker brick in a wrapped state.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 combustion chamber 2 heat storage chamber 3 fuel gas 4 heat storage brick (checker brick) 5 air 10 checker brick of hot blast stove 11 brick main body 12 gas flow path 13 convex part 14 concave part 15 bypass flow path 16 closed part

Claims (1)

(57) [Scope of request for utility model registration] 1. A checker brick for a hot blast stove having a plurality of holes formed therein to serve as gas flow paths and stacked so that the gas flow paths communicate with each other, the checker brick being adjacent to at least one of the upper and lower surfaces of the checker brick. A checker brick for a hot blast stove characterized by forming a bypass flow passage that communicates between the gas flow passages.