JPH0649450A - Fire wall during heating in hot repairing work of coke oven - Google Patents

Abstract

PURPOSE:To obtain a fire wall of a coke oven useful for iron manufacture, capable of being rapidly installed and removed, in heating a brick wall after completion of hot repairing work. CONSTITUTION:A fire wall 1 during heating in hot repairing wherein a fire side wall 2 of lamellar ceramic fiber is installed along an opposing brick side wall 4 in such a way that gap 5 is formed between the fire side wall and the brick side wall at the lower part and similarly a fire ceiling wall 3 of lamellar ceramic fiber is laterally supported along the top of the fire side wall while maintaining fixed gap 6. Flame from a burner is not directly sprayed to the brick side wall, the whole wall is uniformly heated, the fire side wall is readily handled because of lightness in weight and rapidly and simply installed and removed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flameproof wall which is used at the time of raising the temperature of a brick wall or the like after the completion of work in hot repair work of a coke oven used for iron making and the like.

[0002]

2. Description of the Related Art A brick wall of a coke oven used for steel making or the like is prone to damages, cracks, corner breaks, etc., after many years of use.
Therefore, this is inspected regularly to repair the damaged wall bricks, either in whole or in part.

In particular, the bricks in the coke chamber wall in these coke ovens are heated by the adjacent combustion chambers and are constantly heated to 1000 to 12
It is exposed to high temperature of 00 ° C, the wet coal is charged into it and the bricks in the furnace are rapidly cooled, the friction due to the extrusion of carbonized coke, the lateral pressure, the adhesion of carbon generated during carbonization and its separation, etc. Since the bricks are severely damaged due to repeated operations under severe conditions, the damaged wall bricks are repaired by the hot brick transshipment method.

This hot repair work is a method of reloading the repair part bricks while keeping the periphery of the repair part in a hot state, and there is little damage due to cooling of the non-repair part, that the repair period is short, and Since the repair can be done while the coke oven is being produced, there is an advantage that the production loss due to the repair is small.

In this case, if the temperature of the combustion chamber adjacent to the carbonization chamber to be repaired is lowered too much, cracks may occur in the brick wall which is not repaired. Therefore, during repair, thermal changes in the brick wall and joints are caused. To minimize
It is necessary to maintain the brick temperature of the non-repaired part as high as possible for repair work.

By the way, when repairing is completed and the temperature of the transposed brick wall is raised and the temperature is raised, if the flame of the burner for raising the temperature is directly applied to the brick wall, the brick wall temperature locally rises excessively and cracks occur. In addition, since it is not preferable because it causes local expansion, it is necessary to disperse the flame to uniformly heat the whole.

Further, these temporary heating burners have a simple structure in order to perform work such as removing the heat insulating box during the heating process and to minimize the temperature drop during the heating process. It is also necessary to be able to quickly install and remove.

[0008]

As a method for raising and raising the temperature, Japanese Patent Laid-Open No. 58-213083 discloses a method for raising the temperature.
There is a heat retention method at the time of hot repair of a coke oven combustion chamber, and a heat retention method in which an electric heater is installed and heated inside and / or outside of a brick structure located below a repair portion is disclosed.

This heat retaining method requires a large amount of equipment and labor for temporary electric work in order to use an electric heater,
Also, when raising the temperature with an electric heater, it is necessary to install a heat insulating material on the brick surface in order to avoid local heating of the brick wall due to radiation of the heater. It was

As a method of using a gas burner,
As shown in FIGS. 3 (a), (b), and (c), small chamotte bricks 13 are piled up, for example, near the entrance of the repaired carbonization chamber 11 with a proper gap, and the flame directly contacts the brick wall. The box-shaped flameproof wall 12 including the flameproof side wall 14 and the flameproof ceiling wall 15 is constructed so that the burner 7 is not inserted into the flameproof wall 12 to burn, for example, COG to raise the temperature. ing.

The flameproof wall 12 constructed of this brick is made up of a large number of small bricks, although the temperature rise can be carried out smoothly.
Also, since these bricks are heavy, it is difficult to quickly install and remove them, which requires a lot of manpower and time.

The present invention solves the above problems and provides a flameproof wall that can be quickly installed and removed when the temperature of a brick wall or the like after the hot repair work of a coke oven is completed.

[0013]

According to the present invention, a flameproof side wall of a plate-shaped ceramic fiber is provided along opposing side walls of a brick so that a lower portion is provided with a gap between the side wall and an upper portion is arranged along the side wall. Similarly, a flameproof ceiling wall made of plate-shaped ceramic fiber is horizontally installed above the flameproof side wall while maintaining a constant gap. It is a flame barrier.

[0014]

[Operation] When the temperature is raised after the hot repair work is completed,
Insert a burner inside the constructed flame barrier. In this case, the depth of the flame barrier is set to be slightly longer than the length of the flame injected from the burner.

The heat from the flame does not directly hit the lower part of the side wall of the brick with the flame from the burner,
It is conducted and heated through the flameproof side wall. Further, the other brick walls are heated by the hot gas injected from the gap between the flameproof ceiling wall and the tip of the flameproof wall. Therefore, since the flame does not directly jet to the brick wall, the entire wall is uniformly heated by the hot gas and the temperature rises.

In the case of raising the temperature of the carbonization chamber or the like, the heat insulating box for temporary use used for repair is removed at about 450 ° C. At this time, it is necessary to temporarily remove the burner for heating and the flame barrier. After removing these, the temperature is raised again to about 750 ° C. by a burner.

Since the flameproof wall of the present invention is composed of plate-shaped ceramic fibers, it is lighter in weight by about 1/5 than chamotte bricks which have been conventionally used, and can be easily processed. It becomes easy, and therefore the flame barrier can be installed and removed quickly without requiring a lot of manpower.

[0018]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a drawing showing the details of the flameproof wall structure. FIG. 1 (a) is a front view and FIG. 1 (b) is a side view thereof.

The flameproof wall 1 has a flameproof side wall 2 made of plate-shaped ceramic fibers and a gap 5 between the lower side wall 4 and the upper side wall 4. To do.

Similarly, a plate-shaped ceramic fiber flame-proof ceiling wall 3 is laterally installed above the flame-proof side wall 2 while maintaining a constant gap 6, and a temperature raising portion is provided substantially at the center thereof. Insert burner 7.

FIG. 2 shows the flameproof wall 1 in the carbonization chamber of the coke oven.
Fig. 2 (a) is a front view,
FIG. 2B is a side view thereof.

The flameproof wall 1 is constructed at the kiln opening of the carbonization chamber 11 of the coke oven, and as the flameproof wall 1 constructed for the purpose of raising the temperature of the carbonization chamber 11, for example, a flameproof side wall 2 having a length of about 90 cm is suitable. The flame-proof ceiling wall 3 has a width of about 30 cm and is laid horizontally over the flame-proof side wall 2 while maintaining a constant gap 6 and burns, for example, COG by the burner 7 to make the brick side wall 4. The temperature is raised. In the figure, 8 is a combustion chamber, 9
Is a heat insulating box used during repair work, and 10 is a heat insulating material.

The heat from the flame from the burner 7 does not directly hit the lower periphery of the brick side wall 4 by the flame from the burner 7, but is conducted and heated through the flameproof side wall 2. Further, the other brick walls 4 are heated by the high temperature gas injected from the gap 6 of the flameproof ceiling wall 3 and the open end of the flameproof wall. Therefore, the flame is not directly injected to the brick wall, but diffuses to the entire carbonization chamber 11, and the entire wall is uniformly heated by the high temperature gas to raise the temperature.

In this way, the temperature is once raised to about 450 ° C., and the temporary heat insulating box 13, the heat insulating material 14, etc. used for the repair are removed. At this time, the burner 7 for raising the temperature and the flameproof wall 1 are also temporarily removed, and after the removal, the burner 7 is rebuilt and the burner 7 raises the temperature to about 750 ° C. Since the temperature is further raised by gas combustion in the combustion chamber 12, the flame barrier 1, the burner 7 and the like are removed from the carbonization chamber 11 at this point.

[0026]

As described above, in the flameproof wall according to the present invention, the flameproof wall made of plate-shaped ceramic fibers is arranged along the side wall of the brick, and the flameproof wall made of plate-shaped ceramic fibers is similarly provided above. Since the wall is constructed with a certain gap maintained, the flame from the burner is covered by the flame barrier, and the flame does not spray directly to the side wall, so the entire wall is made more uniform by the hot gas from the burner. It is heated and raised in temperature.

The flameproof wall of the present invention is made of a plate-shaped ceramic fiber, and is easy to process and light in weight as compared with the conventionally used brick structure, so that it should be manufactured as a large board. Since it is easy to handle, it does not require a lot of manpower, and the flame barrier can be installed and removed quickly and easily.

[Brief description of drawings]

FIG. 1 is a detailed drawing showing an example of a flameproof wall structure of the present invention, FIG. 1 (a) is a front view and FIG. 1 (b) is a side view thereof.

FIG. 2 is a drawing showing an example in which a flame barrier is installed in a carbonization chamber of a coke oven, FIG. 2 (a) is a front view, and FIG. 2 (b) is a side view thereof.

3 shows an example of a conventional flame barrier structure, FIG. 3 (a) is a detailed view of the flame barrier structure, FIG. 3 (b) is a front view showing an example installed in a carbonization chamber, and FIG. 3 (c). Is a side view thereof.

[Explanation of symbols]

 1 Flameproof Wall 2 Flameproof Sidewall 3 Flameproof Ceiling Wall 4 Brick Sidewall 5, 6 Gap 7 Burner 8 Combustion Chamber 9 Insulation Box 10 Insulation Material 11 Carbonization Chamber 12 Brick Flameproof Wall 13 Chamotte Brick 14 Flameproof Sidewall 15 Flameproof Ceiling wall

Claims (1)

[Claims] 1. A flameproof side wall of plate-shaped ceramic fibers is provided along opposing brick side walls, a lower part is provided with a gap between the side wall, and an upper part is arranged along the side wall, and an upper part of the flameproof side wall is provided. Similarly, a flameproof wall at the time of temperature rise in a hot repair work of a coke oven, which is constructed by horizontally arranging a flameproof ceiling wall of plate-shaped ceramic fibers while maintaining a constant gap.