TWI457426B - Coke oven repair method - Google Patents

Description

Coke oven repair method

The present invention relates to a method for repairing a coke oven for repairing a furnace wall of a combustion chamber including a carbonization chamber wall of a coke oven, in which the coke oven is to be burned The chamber and the carbonization chamber are arranged alternately.

The coke oven is arranged along the width direction of the furnace to alternately arrange the carbonization chamber and the combustion chamber for supplying thermal energy to the carbonization chamber, and through the furnace wall of the carbonization chamber (to separate the carbonization chamber and the combustion chamber) from the combustion chamber toward The carbonization chamber is supplied with heat. Further, the combustion chamber is zoned at a predetermined interval along the length of the furnace, thereby forming a plurality of flue. The coal charged in the carbonization chamber is dry-distilled into charcoal by heating, and then pushed out from an oven opening of one of the carbonization chambers, through which the furnace wall of the carbonization chamber undergoes intense thermal cycling. In addition, when the coke oven is started to operate at a high temperature, if the bricks are cooled to normal temperature, the bricks will suddenly change in volume. Normally, the coke oven will continue to be used until the end of the life. Therefore, it is necessary to periodically check whether the wall bricks are cracked, notched, etc., repaired by spraying as needed, or partially repaired by hot-replacement of the furnace wall tiles.

By the partial repair method of the hot update, for example, the operation of the carbonization chamber to be thermally updated is stopped, and after the heat treatment is performed in the range in which the update operation is to be performed, the repair of the wall brick of the repaired portion is performed. In the update, the furnace wall brick to be repaired is generally disassembled, and the new furnace wall brick is stacked and reassembled in the same manner as before the disassembly, and then heated to make the carbonization chamber in use usable. In the following Patent Document 1, the joint between the wall portion of the unremoved non-repaired portion and the wall portion after the repair of the repaired portion is formed so as to be continuous with the upper and lower joints (gap), and the temperature of the furnace is increased after the update. After the temperature rise, the gap between the furnace wall brick of the repaired portion and the boundary portion of the non-repaired portion of the furnace wall brick is sprayed using the molten material, thereby suppressing the difference in thermal expansion coefficient between the two wall bricks at the time of temperature rise. The boundary is caused to bulge. The furnace wall brick of the combustion chamber can of course also serve as the furnace wall of the carbonization chamber.

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2008-169315

However, when the repairing range of the furnace wall brick becomes large, that is, since the combustion chamber extends along the length of the furnace, when the length of the combustion chamber to be repaired becomes long, the wall of the furnace wall is conventionally used as described above. The assembly method is carried out, so it is necessary to carry out the stacking throughout the long repair range, especially in the part away from the kiln mouth, because the working space (that is, the width of the carbonization chamber) is narrow, and there is The problem of poor workability.

The present invention has been made in view of the above problems, and an object thereof is to provide a method for repairing a coke oven which has good workability when the length of the combustion chamber to which the repairing wall brick is to be renewed is long.

In order to solve the above problems, the repairing method of the coke oven of the present invention is a repairing method of a coke oven in which a furnace wall brick including a combustion chamber of a carbonization chamber wall of a coke oven is repaired, and the coke oven is a combustion chamber and The carbonization chambers are alternately arranged; the kiln mouth side of the carbonization chamber is forward and the opposite direction of the kiln mouth is the inner side, and the repairing and repairing area of the furnace wall brick is divided into the inner side and the front side; The carbonization chamber in the side of the side wall brick renewal repairing area is insulated, and the furnace wall brick of the combustion chamber in the repairing area of the inner side wall brick is piled up in the insulated state, if the above-mentioned inner side wall brick is repaired and repaired After the furnace wall bricks of the combustion chamber are completed, the carbonization chamber in the repairing and repairing area of the inner side wall brick is insulated, and the front side wall brick repairing and heating area is heated in the heat insulating state, and the front side is piled up. The furnace wall bricks update the furnace wall bricks of the combustion chamber in the repaired area.

In addition, after the wall brick of the combustion chamber of the front side wall brick renewal repairing area is completed, the front side wall brick repairing area is heated.

Further, it is characterized in that the flue end surface on the side of the furnace side wall renewal repairing area of the front side of the combustion chamber in the rear side of the furnace wall is in a flat state in both the vertical direction and the furnace width direction. Further preferably, the partition bricks of the flue are constructed such that the longitudinal seams (vertical seams) overlap.

As described above, according to the repairing method of the coke oven according to the present invention, the repairing and repairing area of the furnace wall brick is divided into the inner side and the front side; and the carbonization chamber in the inner side of the rear side wall brick repairing and repairing area is insulated. The furnace wall brick of the combustion chamber in the repairing area of the side wall of the lower pile wall is repaired, and if the wall brick of the combustion chamber of the repairing area of the inner side wall brick is completed, the brick wall of the inner side wall is repaired and repaired. The carbonation chamber of the area is insulated, in this state, the heating and repairing area of the inner wall brick is warmed up, and the brick wall of the combustion chamber of the front side wall brick is repaired; therefore, even the repairing brick wall should be updated. In the case where the length of the combustion chamber is long, the length of the combustion chamber in which the furnace wall brick is stacked can be shortened, and the working property is excellent even if the width of the carbonization chamber is narrow.

In addition, if the furnace wall brick of the combustion chamber of the front side wall brick renewal repairing area is completed, the front side wall brick repairing and heating area is heated, so that the heating efficiency of the furnace wall brick repairing area is good.

In addition, the flue end face of the front side of the combustion chamber in the front side of the combustion chamber of the inner wall of the brick wall is formed to be flat in the up and down direction and the width direction of the furnace, so that it can be absorbed: the inner side wall brick which is heated first The difference in thermal expansion characteristics between the furnace wall brick of the combustion chamber in the repaired area and the furnace wall brick of the combustion chamber in the repairing area of the side wall brick before the temperature rise is updated.

Next, an embodiment of the repairing method of the coke oven of the present invention will be described with reference to the drawings.

Since the coke oven structure itself is the same as the conventional coke oven, the detailed description thereof will be omitted. Fig. 1 is a plan view showing a series of combustion chambers 22 and carbonization chambers 21 on both sides of one of the coke oven repairing methods of the present invention. In the figure, for example, the combustion chamber to the left of the combustion chamber 22 of the non-repaired portion of Fig. 1a is subjected to furnace wall renewal. The blank portion of Fig. 1a shows the state after the furnace wall brick of the combustion chamber 22 to be repaired is disassembled. In each of the sub-pictures, the upper end and the lower end indicate the furnace wall of the carbonization chamber 21, that is, the furnace wall of the adjacent combustion chamber.

The furnace wall brick of the aforementioned combustion chamber is disassembled by the following steps.

(a) dividing the detached region of the furnace wall brick into the front side and the back side with the kiln mouth side of the carbonization chamber being the front side and the opposite direction of the kiln opening being the inner side;

(b) insulating the carbonization chamber of the aforementioned front side wall brick disintegration area;

(c) disassembling the furnace wall brick of the combustion chamber in the disassembled area of the front side wall brick in the insulated state;

(d) if the furnace wall brick of the combustion chamber in the disassembled area of the front side wall brick is completed, the carbonization chamber of the dismantled area of the inner side wall brick is insulated;

(e) Dissolving the furnace wall bricks of the combustion chamber in the disassembled area of the inner side wall brick in the insulated state.

In the coke oven repairing method of the present embodiment, when the kiln opening 1 side is forward and the opposite direction is the inner side, the furnace wall brick renewal repair range of the combustion chamber 22 is divided into: front side furnace wall brick repairing repair area 2 and The side wall bricks are updated to repair area 3. In the present embodiment, the furnace wall brick repair and repair range of the combustion chamber 22 is divided into two: a front side wall brick repair repair area 2 and a back side wall brick repair repair area 3, but the front side wall brick is updated. The repaired area is further divided into: the repairing area of the inner side wall brick and the repairing area of the front side wall brick. In other words, the furnace wall bricks of the combustion chamber 22 are stacked in a mesh shape as will be described later, and the repaired area may be divided into lengths of repair areas suitable for performing a series of stacking.

When the furnace wall brick of the combustion chamber 22 is divided into the repairing range, the carbonization chamber 21 which is a non-repaired portion, that is, the inner side of the brick wall renewal repairing area 3, is insulated by the heat insulating material 4 . In the present embodiment, the checker bricks 5 are assembled on the front side of the heat insulating material 4 of the carbonization chamber 21 in the non-repaired portion of the inner side to prevent deformation of the combustion chamber 22 of the heat insulating portion. The checker brick 5 is configured, for example, by assembling a rectangular parallelepiped refractory brick into a well shape. The checker brick 5 is characterized in that, for example, the heat insulating material 4 is easily pushed down from the front side. Further, the furnace wall of the carbonization chamber 21 on both sides of the furnace wall repairing and repairing range is also covered with a sheet-shaped heat insulating material 6.

After the preparation for the repair work is completed in this manner, as shown in Fig. 1b, the furnace wall bricks 7 of the combustion chamber 22 of the rear side wall brick repairing and repairing area 3 are piled up. The stacking of the furnace wall bricks 7 of the actual combustion chamber 22 is to construct a plurality of flue ducts. The flue is constructed by partitioning the inside of the furnace wall of the combustion chamber 22 by a partition wall at predetermined intervals. The partition wall of the flue is, for example, described in the aforementioned Patent Document 1, in which the protruding portions called the boring head are alternately inserted into the furnace wall, or as shown in Fig. 2, the partition walls of different lengths are alternately assembled by the furnace wall bricks 7, Thereby, the whole is stacked in a mesh form. Further, the furnace wall brick 7 for the furnace wall is also, for example, protruded downwardly from the boring head 23, and the boring head 23 is fitted into the groove 24 to be mesh-shaped. The furnace wall bricks 7 are stacked in such a manner as to be assembled in a mesh shape, for example, in order to prevent the collapse of the combustion chamber 22 against the side pressure at the time of coal charging.

In this way, in the inner wall brick update repair area 3, the furnace wall brick 7 of the combustion chamber 22 is piled up in a mesh-like manner as a whole, as shown in Fig. 1c, the inner side wall brick repairing and repairing area The flue end surface of the front side wall brick of the combustion chamber 22 of the third combustion chamber 22 is flat in the vertical direction and the furnace width direction. It is also preferred to construct the partition bricks of the flue into longitudinal joints (vertical seams). In this way, as will be described later, it is possible to absorb the furnace wall bricks of the combustion chamber 22 of the inner wall bricks of the front side of the temperature-recovery repairing area 3, and the furnace wall bricks of the combustion chambers 22 of the repairing area 2 of the front side wall bricks. 7 The difference in thermal expansion characteristics of the two.

After the completion of the renewal of the furnace wall brick 7 of the combustion chamber 22 of the inner side wall brick repairing and repairing area 3, for example, the heat insulating material 4 is removed, and as shown in FIG. 1d, the sheet-shaped heat insulating material 6 is covered (covered) The furnace wall of the carbonization chambers 21 on both sides is shortened toward the front side wall brick renewal repairing area 2 side, and the front side furnace wall bricks of the carbonization chambers 21 on both sides of the repairing area 3 on the inner side are repaired and repaired. After the heat insulating material 4 is used for heat insulation, the front side wall bricks are stacked to renew the furnace wall bricks 7 of the combustion chamber 22 of the repairing area 2. In order to prevent deformation when the temperature rises after repair, the checker brick 5 is retained.

During the stacking process of the furnace wall bricks 7 of the combustion chamber 22 of the front side wall brick renewal repair area 2, the temperature rise of the inner side wall brick repair and repair area 3 is performed. Among the temperature rises of the updated furnace wall bricks, the most important one is the temperature rise process with a temperature of about 200 ° C to 300 ° C. The temperature range of 200 ° C ~ 300 ° C is a significant increase in the rate of linear expansion. If the temperature rise rate is large, the updated furnace wall brick will be cracked and deformed, and the serious situation will break the balance and cause the furnace wall itself. Collapsed. That is, the temperature rise process of the updated furnace wall bricks must be carried out for an appropriate period of time. Therefore, in the present embodiment, in the stacking process of the furnace wall brick 7 of the combustion chamber 22 of the front side wall brick renewal repair area 2, the furnace wall brick of the repaired area 3 is renewed by the updated inner side wall brick. 7 When the temperature is raised to 200 ° C or lower, the time required for the temperature rising process can be shortened and the heating efficiency can be improved.

Then, as shown in Fig. 1e, after the stacking of the furnace wall bricks 7 of the combustion chamber 22 of the front side wall brick repairing and repairing area 2 is completed, all the heat insulating materials and the lattice bricks 5 are removed, and the front side is restarted. The furnace wall brick is updated to repair the temperature of the area 2, and the further heating of the inner side wall brick repair and repair area 3 is continued.

According to the coke oven repairing method of the present embodiment, the repairing and repairing area of the furnace wall brick 7 is divided into the inner side and the front side, and the carbonizing chamber 21 in the inner side of the rear side wall brick repairing and repairing area 3 is insulated. In this state, the inner wall bricks of the repairing area 3 of the repairing area 3 are piled up, and if the wall bricks 7 of the combustion chamber 22 of the inner side wall brick renewal repair area 3 are piled up, The carbonization chamber 21 of the inner side wall brick renewal repairing area 3 is insulated, and in this state, the inner side wall brick renewal repair area 3 is heated, and the front side furnace wall brick repairing and repairing area 2 is combusted 22 Therefore, even if the length of the combustion chamber 22 of the repairing furnace wall brick 7 is long, the series of lengths of the combustion chamber 22 of the stacked furnace wall brick 7 can be shortened even if the carbonization chamber 21 is The narrow width still has excellent workability.

Further, if the furnace wall brick 7 of the combustion chamber 22 of the front side wall brick repairing and repairing area 2 is completed, the front side wall brick repairing and repairing area 2 is heated, so that the heating efficiency of the furnace wall brick repairing and repairing area is good.

In addition, the flue end surface of the front side wall brick update repair area 2 on the front side of the combustion chamber 22 of the inner side wall brick renewal repair area 3 is flat in the up and down direction and the furnace width direction, so that it can be absorbed: the inner side of the temperature rise first The furnace wall tile renews the difference in thermal expansion characteristics between the furnace wall brick 7 of the combustion chamber 22 of the repairing area 3, and the furnace wall brick 7 of the combustion chamber 22 of the side wall brick renewal repair area 2 after the temperature rise.

1. . . Coke oven

2. . . Front side wall brick repair and repair area

3. . . Rear side wall brick repair and repair area

4. . . Insulation material

5. . . Check brick

6. . . Sheet insulation

7. . . Furnace wall brick

twenty one. . . Carbonization room

twenty two. . . Combustion chamber

Fig. 1a to Fig. are diagrams showing an operation sequence of an embodiment of the coke oven repairing method of the present invention.

Fig. 2 is an explanatory view showing a method of stacking furnace wall bricks of a general combustion chamber.

1. . . Coke oven

2. . . Front side wall brick repair and repair area

3. . . Rear side wall brick repair and repair area

4. . . Insulation material

5. . . Check brick

6. . . Sheet insulation

7. . . Furnace wall brick

twenty one. . . Carbonization room

twenty two. . . Combustion chamber

Claims (3)

A method for repairing a coke oven is a method for repairing a coke oven in which a furnace wall of a combustion chamber including a combustion chamber of a carbonization chamber is repaired, wherein the combustion chamber and the carbonization chamber are alternately arranged; In the case where the kiln mouth side of the carbonization chamber is forward and the opposite direction of the kiln opening is the inner side, the repairing and repairing area of the furnace wall brick is divided into the inner side and the front side; and the front side wall brick is repaired and repaired. The carbonization chamber of the inner side is insulated, and the furnace wall brick of the combustion chamber of the inner side wall brick renewal repairing area is piled up in a heat-insulated state, and if the inner side furnace wall brick is renewed, the furnace wall of the repairing area is repaired. After the completion of the brick stacking, the carbonization chamber in the repairing and repairing area of the inner side wall brick is insulated, and the heating and repairing area of the inner side wall brick is heated in the heat insulating state, and the front side wall brick repairing and repairing area is piled up. The furnace wall brick of the combustion chamber. The method for repairing a coke oven according to the first aspect of the invention, wherein, after the stacking of the wall bricks of the combustion chamber of the front side wall brick repairing and repairing area is completed, the front side wall brick repairing area is heated. The method for repairing a coke oven according to the first or second aspect of the invention, wherein the flue end surface of the front side of the combustion chamber in the front side of the combustion chamber of the rear side wall brick repairing area is in the up and down direction The furnace width direction is flat.