JP2003193059A - Brick for oven wall of coke oven port - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide brick for the oven wall of a coke oven port capable of shortening the operation halt time for a carbonizing chamber to be repaired and also enabling the service life of the oven wall after repaired to be extended. <P>SOLUTION: This brick 1 to be used for the oven wall of the coke oven port has the following design: a front portion 1b having a joint surface joined to the front brick of the oven wall of the coke oven port and a side portion 1a having a flat surface on the flank of the carbonizing chamber side and having a joint surface joined to the brick of the oven wall are monolithically precast molded in an L-shaped manner when viewed from above, and the depth has such a dimension of D as to reach a flue brick defining the 2nd vertical flue from the oven port. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brick for a furnace wall of a coke oven, which is used for a furnace wall of a furnace of a coke oven.

[0002]

2. Description of the Related Art A coke oven is a facility for carbonizing carbon to produce coke. For example, as shown in FIG. 5, a combustion chamber A for burning fuel gas and a carbonizing chamber B for carbonizing coal by combustion heat are shown. And are arranged alternately. The coal charged in the carbonization chamber B is carbonized into coke, and when the coke is generated, the furnace lids (not shown) installed on both sides of the carbonization chamber B are opened, and the coke is arranged at the rear, not shown. It is extruded by the extruder and discharged from the front kiln C shown by the symbol C in the figure. Note that FIG. 5 is a partial cross-sectional view showing the furnace wall of the coke oven in an empty state.

In this way, coke ovens generally have two
Since the coke is repeatedly carbonized and discharged over the operating period of the coke oven for more than 0 to 30 years, the refractory furnace wall body forming the carbonization chamber wall B of the coke oven is worn and protrudes. For this reason, repairs are being performed by reloading the bricks that make up the worn and protruding furnace wall.

The furnace wall which separates the combustion chamber A and the carbonization chamber B is
Conventionally, a plurality of furnace wall bricks as shown in FIG. 5 have been used, and a furnace has been constructed by joining them in a furnace length direction and a height direction (not shown) through joints 7 in which mortar or the like is solidified. For this reason,
When repairing the coke oven wall, use a small brick in a narrow oven.
Since they are assembled one by one, there is a drawback that the operation stop time of the carbonization chamber to be repaired becomes long and the production is greatly reduced.

In FIG. 5, the front brick 2, the corner brick 3 and the furnace wall brick 4 are small bricks, and the vertical flue 5 is formed by the assembled flue brick 9. Reference numeral 6 is a flue. Further, in a furnace wall body constructed of such a small brick, a corner brick 3 is usually arranged at a corner portion of a kiln, and a front brick 2 and a first furnace wall brick 4 are jointed to the corner brick 3. 7 to improve the gas sealability at the corners. As a result, a joint 7 is formed near the kiln mouth.
Therefore, there is also a drawback that the life after repair is short.

Particularly, the furnace wall near the kiln opening is exposed to a large temperature change such as a temperature rise and a temperature drop, and is repeatedly damaged by expansion and contraction. On the other hand, it is preferable to use a refractory aggregate 10 as shown in FIG. 6 for repairing the furnace wall of the coke oven.
No. 01-19968 is proposed. This refractory aggregate 10 is formed by dividing the furnace wall body to be repaired into a plurality of laminated parts and combining a plurality of bricks in a shape corresponding to each laminated part outside the furnace, and using this furnace When the wall body is repaired, there are few joints in the vicinity of the kiln opening, so that the life of the furnace wall body after the repair can be extended, but there are the following problems.

That is, the refractory aggregate 10 is composed of the vertical flues 5
In addition to combining up to the flue bricks 9 forming the, the outer shape is the fourth vertical flue 5 from the front of the coke oven kiln opening.
Has a depth E (see FIG. 5) that reaches the flue brick 9 that forms a stack, and a plurality of bricks are combined in the height direction, so a relatively large heavy machine is used when repairing the furnace wall of the coke oven. Must also be the dismantling of the furnace hardware 8,
There is a problem that the recovery work and the dismantling of the flue brick 9 forming the vertical flue 5 are required, and the operation stop time of the carbonization chamber to be repaired cannot be shortened so much.

[0008]

SUMMARY OF THE INVENTION The present invention is to eliminate the above-mentioned problems of the prior art, can shorten the operation stop time of the carbonization chamber to be repaired, and can also provide a kiln opening after the repair. An object of the present invention is to provide a brick for a furnace wall of a coke oven kiln that can prolong the life of the furnace wall.

[0009]

SUMMARY OF THE INVENTION The present invention is a brick for a coke oven oven wall used for the oven wall of a coke oven, which is joined to a front brick of the oven oven wall. A front portion having a joint surface and a side portion having a flat surface on the side surface on the carbonization chamber side and having a joint surface to be joined to the furnace wall brick of the kiln opening furnace wall as viewed from above Is integrally precast, and the dimension in the furnace length direction is set to a dimension D that reaches the flue brick forming the second vertical flue counting from the kiln side.

In this case, the external shape of the brick for the furnace wall of the coke oven kiln has a dimension D of 700 to 1000 m.
m, and the height dimension H in the furnace height direction is preferably 100 to 300 mm, since the bricks for the wall of the coke oven kiln mouth can be relatively easily handled by hand when repairing the coke oven kiln mouth. Yes, also, providing a flue brick receiving portion on the side of the side portion on the side of the combustion chamber, it is possible to prevent the deviation of the existing flue bricks when repairing the coke oven kiln mouth furnace wall, which is preferable. Is. Furthermore, it is also effective to provide a curved surface portion at the corner portion on the carbonization chamber side of the joint surface that is joined to the furnace wall brick of the side portion.

[0011]

1 and 2 show an example of a brick 1 for a furnace wall of a coke oven kiln according to the present invention. FIG. 1 is a perspective view showing an example of a brick 1 for a furnace wall of a coke oven kiln according to the present invention (hereinafter, also simply referred to as a brick 1 for a coke oven furnace wall), and FIG. 2 (a) is a brick for a furnace wall. 2 is a plan view of FIG.
(B) is the side view seen from the combustion chamber side of the brick 1 for furnace walls.

The brick 1 for the furnace wall of the coke oven comprises a substantially rectangular parallelepiped front part 1b and a substantially rectangular parallelepiped side part 1a, and the front part 1b and the side part 1a are integrally precast. Hereinafter, as shown in FIG. 1, the front portion 1b is arranged on the front side, and the front side is referred to as the front.

The outer shape of the brick 1 for the furnace wall is substantially L-shaped when viewed from above, and the brick 1 for the coke furnace furnace wall has a height dimension H, a front width dimension W, and a depth dimension D. is there. The side surface of the side portion 1a on the carbonization chamber side is a flat surface in order to reduce frictional resistance during coke extrusion. A flue brick receiving portion 1c is provided on the side surface of the side portion 1a on the combustion chamber A side. In this case, the flue brick receiving portion 1c is formed by three flat surfaces that come into contact with the flue brick 9.

The brick 1 for a furnace wall has an upper surface and a lower surface as joint surfaces, and a convex dimple 1d is formed on the upper surface and a concave dimple 1e is formed on the lower surface. In addition, the following two surfaces are used as joint surfaces. That is, of the vertical surfaces of the front portion 1b, the left side surface of the front portion 1b (see FIG. 1) and the side of the vertical surface of the side portion 1a opposite to the side where the front portion 1b of the side portion 1a continues. The rear surface is the joint surface. On the left side surface of the front portion 1b and the rear surface of the side portion 1a, convex dowels 1d are formed as flat surfaces (see FIG. 2).

The left joint surface of the front portion 1b is shown in FIG.
As shown in, when the kiln mouth furnace wall is constructed, it is a surface that is joined through the front brick 2 and the joint 7, and the other
The joint surface on the rear side of the side portion 1a is a joint surface that is left without being dismantled, or is disassembled and is joined to the newly reloaded furnace wall brick 4 through the joint 7. When repairing the oven wall of the coke oven kiln, if the depth of the oven wall is deeper than the dimension D and the damage to the oven wall is small, the oven wall of the depth of the oven port C that is deeper than the dimension D is not dismantled. Left behind.

Here, dowels 1d and 1e are formed on the joint surface of the brick 1 for the furnace wall. If such a dowel is formed on the joint surface, the furnace wall of the kiln mouth part It is desirable to form it because it can be accurately aligned at the time of construction, and at the time of operation after completion of repair, it can prevent brick displacement and falling off due to pressure measurement by coke extrusion. The brick 1 for furnace walls described above is one side of the kiln opening, that is, the kiln opening C shown in FIG.
The brick 1 for the furnace wall installed on the left side of
The brick for the furnace wall installed on the right side of the kiln opening C in FIG. 3 may have a shape symmetrical with respect to the kiln opening C with a plane perpendicular to the kiln opening C sandwiched in the center.

As described above, in the brick 1 for a coke oven furnace wall according to the present invention, the front portion 1b and the side portion 1a are integrally precast, and the front portion 1b and the side portion 1a are formed.
There is no joint 7 between and, and the depth is set to a dimension D that reaches the flue brick 9 forming the second vertical flue 5 counting from the kiln C, as shown in FIG. . 3 is a partial schematic cross-sectional view of the coke oven,
The position of the joint 7 after repairing the kiln mouth furnace wall using the brick 1 for furnace walls mentioned above is shown.

The kiln opening using the brick 1 for the coke oven furnace wall according to the present invention is a brick for the oven wall in which the front part 1b and the side part 1a are integrally precast, and the furnace near the kiln port C Since it is not necessary to dispose the corner bricks 3 on the wall, there is no joint 7 (see FIG. 3) for joining the corner bricks 3 and the side bricks 4. On the other hand, in the conventional kiln mouth furnace wall using small bricks,
In order to improve the gas sealability at the corners,
A corner brick 3 is installed, and a front brick 2 and a side brick 4 are joined to the corner brick 3 through joints 7 (see FIGS. 3 and 5). Therefore, the kiln mouth C
On the furnace wall in the vicinity, there is a joint 7 that joins between the corner brick 3 and the side brick 4.

The furnace wall in the vicinity of the kiln port C is exposed to a large temperature change such as temperature increase and decrease during coke production, and repeats expansion and contraction. Is the most vulnerable part, and when a conventional small brick is used, it is considered that damage will occur at the joint 7 between the corner brick 3 and the side brick 4 due to such a rapid thermal history. However, when the brick 1 for a coke oven furnace wall according to the present invention is used, a joint wall 7 can be formed in a portion where internal stress is likely to occur due to such expansion and contraction, and thus the kiln mouth portion The coke oven after repairing the oven wall has a strong oven wall structure in which damage is unlikely to occur due to expansion and contraction.

As a result, after repairing the oven wall of the coke oven furnace, the life of the oven wall can be extended,
Meanwhile, without reducing production by repairing the furnace wall of the kiln,
It becomes possible to produce coke by operating the coke oven. In the brick 1 for a coke oven furnace wall according to the present invention, the depth dimension D of the side portion 1a is, as shown in FIG. 3, a flue brick that forms a second vertical flue 5 counting from the kiln mouth C side. Since the size is such that it reaches 9, it is easy to handle when transferring the bricks for the furnace wall or taking the bricks for the furnace wall into the carbonization chamber B when repairing the furnace wall of the coke oven kiln mouth, and it is a large heavy machine. It is possible to repair the kiln opening of the coke oven without using.

Further, when the brick 1 for a coke oven furnace wall according to the present invention is used, when repairing the coke oven kiln mouth, the furnace metal fitting 8 is dismantled, restoration work is performed, and the vertical flue 5 is formed. Since it is possible to repair the above-mentioned large-damaged parts without disassembling and restoring the bricks 9, compared with the case of using the large-scale refractory assembly 10 as shown in FIG. The furnace wall can be easily repaired, and the repair period can be shortened.

When the coke is pushed out, the furnace metal member 8 is erected in contact with the furnace wall of the furnace so that it can be opposed to the horizontal force acting on the wall of the furnace in the direction of the furnace C. The width W of the brick 1 for the furnace wall is set to an appropriate dimension that can be joined to the front brick 2 through the joint 7 so that the furnace wall surface of the kiln opening does not come out or retract too much.

In normal coke oven operation, coke is produced in the coke chamber B which has not been repaired when the oven wall of the coke oven kiln is repaired. For this reason, the coke truck that receives the coke passes through the front side of the kiln opening C shown in FIG. 3 in which the coke is being repaired, or the extruder is located on the opposite side of the kiln opening C shown in FIG. There is a possibility that the machine may pass through the kiln on the machine side).

In repairing the furnace wall of the coke oven kiln opening, the operating conditions of the carbonization chamber B during the production of the coke which has not been repaired are adjusted so that the equipment and the equipment used for the repair and the equipment used for the production of the coke are The schedule is adjusted so as not to interfere, but a large refractory assembly as shown in FIG.
If 10 is used, it will be difficult to adjust such a schedule when repairing exceeds 4 hours, and equipment used for repair, evacuation work to evacuate equipment, and subsequent recovery work will occur, and due to interruption of repair work, Usually, the downtime of the carbonization chamber to be repaired is further extended.

On the other hand, in the present invention, since the brick can be made relatively lightweight, the kiln opening of the coke oven can be repaired without using a large heavy machine. Even if the restoration work occurs, the time is short, and the operation stop time of the carbonization chamber to be repaired can be further shortened. As described above, by using the brick for the furnace wall according to the present invention, at the time of repairing the coke furnace kiln mouth furnace wall, the dismantling of the metal body of the furnace, the recovery work and the dismantling of the flue brick forming the vertical flue Since the coke oven kiln mouth furnace wall can be repaired without performing restoration work, the repair period can be shortened compared to the case of using a large refractory aggregate as shown in FIG. In addition to being able to increase the amount of coke production in the meantime, the corner bricks 3 and the side bricks 4 in the kiln mouth furnace wall corner
Since there is no joint 7 to join between the furnace and the coke oven, the life of the furnace wall of the kiln can be extended after the coke oven is repaired, until the furnace wall of the kiln is repaired. During this time, it is possible to produce coke without reducing production.

If the outer shape of the brick 1 for the furnace wall of the coke oven is such that the length D in the furnace length direction is 700 to 1000 mm and the height H in the furnace height direction is 100 to 300 mm, the normal carbonization chamber and the combustion chamber are separated from each other. Furnace wall brick thickness t is 80 to 120
Since it is mm, the mass per piece is 20 kg to 6
It can be set to 0 kg, and when repairing the coke oven kiln mouth,
The coke oven furnace wall brick 1 can be manually handled when the coke oven furnace wall brick 1 is transferred and the coke oven furnace wall brick 1 is taken into the carbonization chamber B, and the coke oven kiln mouth portion can be more easily repaired. This is preferable since the repair period can be further shortened.

Furthermore, the brick 1 for the coke oven furnace wall according to the present invention may be provided with a flue brick receiving portion 1c on the side surface of the side portion 1a on the side of the combustion chamber. Even if the flue brick forming the first vertical flue counting from the front of the kiln is not dismantled when the furnace wall of the section is dismantled, the side part 1a is located on the side of the combustion chamber A side. The provided flue brick receiving portion 1c is preferable because the deviation can be prevented.

In addition, in the present invention, the curved surface portion 1f is provided at the corner of the side portion 1a on the carbonization chamber side of the joint surface to be joined to the furnace wall brick.
It is also preferable to provide (see FIG. 2A). The reason for this is that when the coke oven kiln mouth furnace wall is repaired, even if there is a step at the boundary between the unreloaded side bricks 4 that are not repaired and the reloaded bricks 1 for the furnace wall, carbonization occurs due to thermal spraying or the like. This is because the furnace wall surface on the room side can be finished smooth. The curved surface 1f has a radius R of 15 to 25 mm
Is desirable.

The material for the brick for the furnace wall according to the present invention may be any brick material that can be used as a furnace wall of a coke oven, and may be silica stone brick, cordierite or the like. Further, the brick 1 for the coke oven furnace wall according to the present invention,
Although the side portion 1a and the front portion 1b are integrally precast-molded, the precast molding conditions are not particularly limited. Then, it can be dried at room temperature and used. Furthermore, it is more preferable to dry at a high temperature of 100 to 150 ° C., since explosion can be prevented during carbonization distillation of coke after repair of the coke oven kiln mouth portion.

By the way, in FIG. 3, it is described that the present invention is applied to the furnace wall of the furnace part C on the discharge side of the coke. However, the brick 1 for a coke furnace furnace wall according to the present invention is provided with an extruder. It goes without saying that it can also be applied to the kiln opening on the machine side. The action and effect are the same as those applied to the kiln port C on the coke discharge side.

[0031]

EXAMPLE The present invention was applied to the Karlstil type coke oven 100 shown in FIG. This Karl still type coke oven 1
00 has 102 carbonization chambers B, and the height of the furnace wall forming the carbonization chamber B is 6.7 m. Reference numeral 102 in FIG. 4 is a furnace lid of the carbonization chamber B.

When repairing one side of the furnace wall forming one carbonization chamber B of the coke oven 100, as shown in FIGS.
A plurality of bricks 1 for furnace wall shown in was used. At that time, the outer shape of the brick 1 for the furnace wall corresponds to the outer shape of the small brick used in the kiln opening portion of the existing coke oven 100 before use, and the depth dimension D of the side portion 1a is 812 mm,
The height dimension H was 260 mm, the average thickness t was 100 mm, and the front portion 1b and the side portion 1a were integrally precast. The mass of one brick for furnace wall 1 was about 53 kg. The material of the furnace wall brick 1 was cordierite.

In repairing the furnace wall of the coke oven furnace, the use of the carbonization chambers on both sides of the combustion chamber having the furnace wall to be repaired out of 102 gates is stopped, and the interior of the carbonization chamber on the repair side, And after performing heat insulation work on the non-repair surface,
One side of the furnace wall having a length of about 800 mm was dismantled backward from the kiln mouth C, and bricks were piled up, finished, and heated to complete the repair of the kiln mouth furnace wall. The operation period of the two carbonization chambers was 5 days from the time when the two carbonization chambers were stopped to the time when the repair of the kiln mouth was completed and the use of this carbonization chamber was started again. When repairing the kiln mouth furnace wall of the coke oven using the brick for the furnace wall according to the present invention, the dismantling of the furnace metal hardware, the recovery work and the dismantling of the flue brick, the rebuilding work is unnecessary, Moreover, since the brick for the furnace wall can be made relatively lightweight, it is easy to handle, and the kiln opening of the coke oven can be repaired without using a large heavy machine, and the operation stoppage period of the two carbonization chambers can be reduced to the conventional one. It could be set to about / 3 or less.

When the refractory assembly 10 shown in FIG. 6 was used to repair the furnace wall of the furnace in the carbonization chamber,
Shutdown of the two carbonization chambers due to the dismantling and restoration work of the furnace metalwork and the dismantling and rebuilding work of the flue bricks, as well as the incorporation of a large refractory assembly 10. The period was about 2 weeks.

[0035]

According to the present invention, since the brick for the furnace wall has an appropriate outer shape, at the time of repairing the furnace wall of the coke furnace kiln port,
Compared with the case where a small brick or a large refractory aggregate 10 is used, the operation stop time of the carbonization chamber for repairing the kiln opening can be shortened. Further, since the brick for the furnace wall can be made relatively lightweight, compared to the case of using a large refractory aggregate 10, the handling becomes easier, and the kiln opening of the coke oven can be used without using a large heavy machine. It becomes possible to repair.

Furthermore, when the brick for the furnace wall of which the front portion and the side portion are integrally precast is used to repair the furnace wall of the coke oven kiln port of the present invention, and when a small brick is used, In comparison, the life of the furnace wall can be extended, and coke can be produced without reducing production until re-repair.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a brick for a furnace wall according to the present invention.

2 (a) is a plan view of the brick for a furnace wall shown in FIG. 1,
(B) is the side view seen from the combustion chamber side of the brick for furnace walls shown in FIG.

FIG. 3 is a partial schematic cross-sectional view of a coke oven using the brick for oven wall shown in FIG.

FIG. 4 is a schematic perspective view including a vertical section of a coke oven to which the present invention has been applied.

FIG. 5 is a partial schematic cross-sectional view of a coke oven when a conventional small brick is used.

FIG. 6 is a perspective view showing a large brick made of a conventional refractory aggregate.

[Explanation of symbols]

1 Furnace wall brick 2 front brick 3 corner bricks 4 furnace wall bricks 1a Side part 1b Front section 1c Flue brick support 1d, 1e dowel 1f chamfer 5 vertical flues 6 flues 7 joints 8 furnace hardware 9 Flue brick 10 Refractory aggregate A combustion chamber B carbonization chamber C kiln D, E Side depth H Height of brick for furnace wall Width of brick for W furnace wall 100 coke oven 102 Carbonization chamber furnace lid 106 heat storage room 110 coal inlet 112 Combustion chamber peephole 120 Fuel gas piping 122, 124 air 125 fuel gas 128 exhaust gas 126 Upper horizontal flue 130 small flue 132 Great flue 136 chimney

Claims (4)

[Claims] 1. A brick for an oven wall of a coke oven oven, which is used for an oven wall of the oven oven of a coke oven, and a front portion having a joint surface to be joined to a front brick of the oven wall of the oven oven. , A side portion having a flat surface on the side surface on the carbonization chamber side and having a joint surface to be joined to the furnace wall brick of the kiln mouth furnace wall is precast integrally as an L-shape when viewed from above, Further, the lengthwise dimension of the furnace is a dimension D reaching the flue brick forming the second vertical flue counted from the kiln mouth, and the brick for the furnace wall of the coke oven kiln is characterized in that 2. The outer shape of the brick for the furnace wall of the coke oven kiln opening is such that the dimension D is 700 to 1000 mm and the height dimension H in the furnace height direction is 100 to 300 mm. Brick for the oven wall of the coke oven kiln described. 3. The brick for a coke oven kiln mouth wall according to claim 1, wherein a flue brick receiving portion is provided on a side surface of the side portion on the combustion chamber side. 4. The coke oven according to any one of claims 1 to 3, wherein a curved surface portion is provided at a corner portion on the carbonization chamber side of a joint surface to be joined to the furnace wall brick of the side portion. Brick for the furnace wall of the mouth.