JP6789753B2 - Coke furnace and its repair method - Google Patents

Description

The present invention relates to a coke oven and a method for repairing the coke oven, and a method for reconstructing a new furnace body in the trace of dismantling the old furnace body and a furnace to be constructed.

A coke oven is constructed by constructing a heat storage chamber on a hearth structure, and alternately arranging carbonization chambers and combustion chambers constructed of refractory bricks on the heat storage chamber.
The refractory bricks that make up the carbonization chamber and the combustion chamber wear out as the coke oven operates.
Conventionally, in order to repair such wear, small-scale wall surface repair (pad-up repair) is performed at the time of inspection, and relatively large-scale repair such as replacing a part of the furnace body is also performed. ing.

For example, in Patent Document 1, in order to efficiently repair bricks of a chamber furnace type coke oven having a complicated structure of combustion chamber bricks, the wall body to be repaired is divided into a plurality of laminated portions, and each laminated portion. A refractory aggregate in which a plurality of bricks are combined in a shape matching the above is formed outside the furnace, and after dismantling and removing the wall body repair part of the coke oven, the wall body is constructed with the refractory aggregate.

By partially renewing the furnace body by such a repair method, the life of the coke oven can be extended.
However, in recent years, in addition to long-term operation, operating conditions have become harsher due to improved productivity, the aging of the entire coke oven has accelerated, and the frequency of furnace wall repairs has increased.
For this reason, for long-term operating coke ovens, there is an increasing demand for reconstruction of the furnace body rather than extension of the furnace life by repairing the furnace wall.

For example, in Patent Document 2, when dismantling and reconstructing a long-running coke oven, productivity can be improved as compared with that before dismantling, instead of simply constructing the same coke oven as before dismantling. ..
Specifically, the carbonization chamber, the combustion chamber, and the heat storage chamber are dismantled, leaving the hearth structure, and the heat storage chamber is constructed on the hearth structure at a height lower than the height before dismantling, and above the heat storage chamber. The carbonization chamber and the combustion chamber are constructed by increasing the height of the heat storage chamber by the amount of the reduction.

The above-mentioned Patent Document 1 is for partially renewing a relatively large-scale furnace body, and the above-mentioned Patent Document 2 is for reconstructing a new furnace body at the site of an old furnace body.
However, in each method, the work at the installation site of the coke oven is enormous, and it takes about 18 months in total, which is 9 months for dismantling and 9 months for the construction of the coke oven as the construction period, that is, the shutdown period of the coke oven. there were.

In response to such problems during the construction period, part of the furnace body was removed, a new furnace body part was pre-constructed, and the furnace body part was incorporated into the coke oven while the coke oven was in operation. By doing so, a method for repairing a coke oven that can shorten the construction period has been proposed (see Patent Document 3).
In the repair method of Patent Document 3, the pre-constructed furnace body portion is a furnace wall that separates the carbonization chamber and the combustion chamber.

The new furnace wall will be constructed near the installation site of the coke oven and will be transported to the built-in part of the coke oven. At the time of construction, a large lower brick is hung between a pair of supporting metal beams extending in the direction of the furnace length, and a brick to be the furnace body is constructed on it. At the time of transportation, the supporting metal beam is lifted by a moving hoist and transported to the built-in part of the coke oven. For transportation, the moving path of the extruder extending in the direction of the furnace leader is used, and the moving rail of the extruder is used. The new furnace body is formed in the direction of the furnace length from the time of construction, and is incorporated into the coke oven only by translation in the same posture. Support metal rails are not included in the built-in furnace body.

Japanese Unexamined Patent Publication No. 2001-0199668 Japanese Unexamined Patent Publication No. 2013-199560 International Publication No. 2012/078036

The repair work period of the coke oven can be shortened by pre-constructing a part of the furnace body as described in Patent Document 3. However, the method of Patent Document 3 was not sufficient for further shortening the construction period.
For example, in Patent Document 3, since the pre-construction is limited to the furnace wall, it is difficult to pre-construct a larger part at once. In particular, in Patent Document 3, since the supporting metal beam is used at the time of construction, it is not possible to cope with a thickness larger than that of the furnace body.
Further, Patent Document 3 can be applied only to the coke oven superstructure which is a combustion chamber and a carbonization chamber because the pre-construction is limited to the furnace wall. That is, there is a problem that it cannot be applied to a larger part in the height direction, such as including the heat storage chamber from the upper part to the lower part of the coke oven.

Further, in Patent Document 3, a support metal beam is used during construction or transportation, and this support metal beam is removed when it is incorporated into a coke oven. Therefore, there is also a problem that the work procedure cannot be sufficiently simplified.
Here, it is conceivable that the removal work is omitted and the supporting metal beam is incorporated into the coke oven together with the furnace wall. However, in Patent Document 3, the supporting metal beam is arranged in the lower part of the furnace wall to be pre-constructed, that is, the lower part of the combustion chamber and the carbonization chamber of the coke oven and the upper part of the heat storage chamber, and the temperature environment is set. Considering this, it is not preferable to install metal parts in the relevant part due to the configuration of the coke oven.
For this reason, in Patent Document 3, it is difficult to further shorten the construction period, and a method for repairing a coke oven capable of further shortening the construction period has been requested.

An object of the present invention is to provide a coke oven capable of shortening an outage period and a method for repairing the coke oven.

The coke oven of the present invention is a coke oven formed by reconstructing a new furnace body on a furnace body foundation left by disassembling the old furnace body at the installation site, and the new furnace body has a plurality of the new furnace bodies. Manufactured separately into furnace blocks, the furnace block is constructed by stacking furnace bricks on a steel base, and the steel base is incorporated into the new furnace body as part of the furnace body block. It is characterized by being

The present invention is a method for repairing a coke oven in which a new furnace body is reconstructed on a furnace body foundation left by disassembling the old furnace body at the installation site, and a work site is installed around the installation site. A work site installation process, a new furnace body manufacturing process in which the new furnace body is divided into a plurality of furnace body blocks and manufactured at the work site, and a transfer route installation for installing a transfer path from the work site to the installation site. A step, an old furnace body removing step of removing the old furnace body from the furnace body foundation at the installation site, a furnace body block transporting step of transporting the furnace body block to the installation site by the transport path, and the above-mentioned At the installation site, the new furnace body has a furnace body block installation step of fixing the furnace body block to the furnace body foundation and connecting the adjacent furnace body blocks to each other, and during the operation of the old furnace body. At the start of the manufacturing process, the furnace body block is constructed by stacking furnace body bricks on a steel base, and the steel base is incorporated into the new furnace body as a part of the furnace body block. It is characterized by.

In the present invention, the furnace body block can be a block obtained by dividing the furnace body of a coke oven into a plurality of blocks in the direction of the furnace leader.
For example, the furnace body block has a complete furnace body unit (lower heat storage chamber, upper combustion chamber and carbonization chamber) in the furnace length direction, and the furnace body units have a plurality of gates (3 to 3) in the furnace head direction. It can be configured to be arranged in parallel (about 8 gates).

In the present invention, such a furnace body block is manufactured in the new furnace body manufacturing process, transported to the installation site in the furnace body block transfer process, and the furnace body blocks are sequentially connected in the furnace body block installation process. A new furnace body can be formed at the installation site.
In the present invention, the new furnace body manufacturing process is started during the operation of the old furnace body. The work site installation process should be carried out prior to this. The shutdown period of the coke oven at the time of renovation is the period from the start of the old furnace body removal process to the completion of the furnace body block installation process. In the present invention, the period from the start of the new furnace body manufacturing process to the shutdown of the old furnace body is not included in the shutdown period.

In the present invention, by using a steel base, it is possible to transport the furnace body block.
If there is no steel base, it will be a brick block only, and there is a possibility that the joints will break or collapse during transportation. However, in the present invention, since the steel base is continuous at the bottom of the furnace body block, the brickwork portion constructed on the steel base can also be transported.
Even when a steel base is used, it is preferable to apply an external force such that a compression load is applied to the brickwork on the steel base in the furnace body block transfer step in order to prevent joint breakage.

In the present invention, since the steel base is incorporated into the new furnace body as a part of the furnace body block, no work for removing the steel base is required.
And since the steel base is installed at the bottom of the furnace body block, it can be located below the heat storage chamber of the new furnace body when it is incorporated in the new furnace body, and the temperature environment can be relaxed, which is a problem. Does not occur.

As described above, according to the present invention, the scale of the furnace body block which is a part of the furnace body to be pre-constructed can be expanded, and the removal work at the time of assembling the steel base can be omitted. It is possible to shorten the downtime period when repairing the furnace.
For example, the operation suspension period, which was conventionally required for 18 months, can be shortened by about 5 months to about 13 months.

In the present invention, it is preferable that the furnace body block has a heat transfer mitigation means for mitigating heat transfer from the brickwork portion to the steel base.
As the heat transfer mitigation means, a heat insulating material layer between the steel base and the brickwork portion, a cavity for heat insulation can be used, and a cooling pipe for water cooling or air cooling can be used.

In such an invention, the heat transfer mitigation means can alleviate the heat transfer from the combustion chamber and the carbonization chamber to the steel base.
That is, the steel base of the furnace body block is embedded as a part of the new furnace body by connecting the furnace body blocks to form a new furnace body in the furnace body block installation process. Then, in the operating state, heat from the combustion chamber and the carbonization chamber is transferred to the steel base. If there is such heat transfer, the steel base may be deformed.
However, in the present invention, since the heat transfer to the steel base can be relaxed by the heat transfer mitigation means, the influence on the steel base can be minimized.

In the present invention, it is preferable that the furnace body block is formed by forming a plurality of furnace body units in parallel in which half-divided carbonization chambers are formed on both sides of the combustion chamber.

In such an invention, in the furnace body block, the combustion chamber and the carbonization chamber repeat a predetermined number of gates, and both sides become a half-split carbonization chamber. That is, the furnace body block has a structure in which the coke oven is cut at the carbonization chamber portion. Since the carbonization chamber has a simple structure with less brickwork, it is suitable for cutting, and the work load can be reduced when connecting the furnace blocks in the furnace block installation process.

In the present invention, as the transfer path, an extruder moving path extending in the furnace group length direction along the furnace body foundation is used, and in the furnace body block transfer step, the furnace length direction of the furnace body block is the furnace body. When the furnace body block is moved along the extruder movement path and reaches the part to be installed in the state of being in the direction of the furnace group leader of the foundation, the furnace length direction of the furnace body block is the furnace length of the furnace body foundation. It is preferable to change the direction of the furnace body block so as to be in the direction, move the furnace body block in the direction of the furnace length, and carry the furnace body block onto the furnace body foundation.

In the present invention as described above, it is possible to utilize an extruder moving path extending in the direction of the head of the furnace along the core foundation of the coke oven as a transfer path, and even in a coke oven in which various facilities are densely packed around it. A transport route can be secured.

In addition, when transporting the extruder movement path, the furnace body block is oriented so that the furnace length direction is the furnace group length direction of the furnace body foundation, so that a sufficient width cannot be obtained even in the extruder movement path. Can be passed through body blocks. If the width of the extruder movement path is wide, the number of gates in the furnace body unit of the furnace body block can be increased, and if the width of the extruder movement path is narrow, the number of gates in the furnace body unit of the furnace body block can be reduced. Can be adjusted.

In the present invention, in the furnace body block transporting step, a mobile pedestal on which the furnace body block is placed is used, and when the furnace body block is carried in or out on the moving pedestal, the steel base and the steel base are used. It is preferable to install an air caster between the moving pedestal and the upper surface of the moving pedestal, and to use a dolly when moving the moving pedestal and the furnace body block.

In the present invention as described above, by using the moving platform and the dolly, it is possible to simplify the ground reinforcement of the transport path in the section where the dolly can move. Further, by using the air casters, it is possible to easily carry in or out the furnace body block to the mobile stand.
Further, when the direction is changed at the time of installation on the furnace body foundation as described above, the direction change work can be easily performed by supporting the furnace body block on the transport stand by using air casters. it can.
When supporting the furnace block with air casters, the lifting height is relatively high around the steel base and relatively low near the center to compress it into a brickwork structure on the steel base. It is possible to give force and prevent joint breakage.

In the present invention, the new furnace body manufacturing step, the old furnace body removing step, the furnace body block transporting step, and the furnace body block installation step may overlap each other for a period of time.
For example, in a part of the coke oven, the old furnace body removal process is performed, the furnace body block is transported to the adjacent part where the old furnace body has already been removed, and the furnace body for the furnace body block that has already been carried in. Parallel processing such as a block installation process may be performed.

Further, the furnace body block installation step of the preceding furnace body block and the new furnace body manufacturing process of another furnace body block may be overlapped for a period of time. That is, in the present invention, the new furnace body manufacturing process is started while the old furnace body is in operation, but in the new furnace body manufacturing process, after the operation of the old furnace body is stopped, the old furnace body removal process or other parts (other furnaces) It may be continued until the implementation of the furnace body block installation process of the body block).
By such parallel processing, the operation suspension period can be further shortened.

According to the present invention, it is possible to shorten the downtime period when the coke oven is repaired.

The plan view which shows the installation site, the work site and the transport path of one Embodiment of this invention. FIG. 5 is a cross-sectional view showing a coke oven to be repaired in the above embodiment. The figure which shows the process of the said embodiment. The plan view which shows the work site of the said embodiment. The front view which shows the work site of the said embodiment. The front view which shows the moving stand and the furnace body block of the said embodiment. The front view which shows the dolly of the said embodiment. The side view which shows the dolly of the said embodiment. The side view which shows the air caster of the said embodiment. The side view which shows the support state of the air caster of the said embodiment. The plan view which shows the transport path of the said embodiment. The rear view which shows the connection pedestal and auxiliary pedestal of the said embodiment. The plan view which shows the carry-in to the transfer position of the furnace body block of the said embodiment. The plan view which shows the direction change of the furnace body block of the said embodiment. The plan view which shows the transfer to the furnace body foundation of the furnace body block of the said embodiment. The rear view which shows the transfer to the furnace body foundation of the furnace body block of the said embodiment. The plan view which shows the furnace body block arranged in the furnace body foundation of the said embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[Outline of renovation]
In FIG. 1, in the present embodiment, the upper furnace body 2 (old furnace body 2P) is removed while leaving the furnace body foundation 3 of the coke oven 1, and a new furnace body 2 (new furnace body 2N) is placed in the trace. To construct.
In the present embodiment, in order to manufacture the new furnace body 2N while the old furnace body 2P is in operation, the new furnace body 2N is manufactured at a place different from the old furnace body 2P.
Then, in order to carry the manufactured new furnace body 2N into the furnace body foundation 3 from which the old furnace body 2P has been removed, the new furnace body 2N is manufactured as a plurality of furnace body blocks 4.

In order to realize such repair work, in the present embodiment, the place where the coke oven 1 is installed (installation site A1), the place where the furnace body block 4 is manufactured (work site A2), and the furnace body block 4 are transported. A route (transport route A3) is used.

The work site A2 is a flat place secured in the vicinity of the installation site A1 and is a continuous place at substantially the same level as the installation site A1. The work site A2 is secured with a predetermined area required for manufacturing the plurality of furnace body blocks 4.
The transport path A3 is a continuous passage space from the work site A2 to the installation site A1, and in the present embodiment, a flat and strong ground through which the dolly can pass is used.

[Coke furnace to be repaired 1]
FIG. 2 shows the furnace body 2 and the furnace body foundation 3 of the coke oven 1 to be repaired in the present embodiment.
In FIG. 2, the coke oven 1 to be repaired has a furnace body 2 constructed by brickwork, and the furnace body 2 is installed on the furnace body foundation 3. In the figure, the left-right direction is the direction of the coke oven 1 and the drawing orthogonal method is the direction of the coke oven 1.

The furnace body 2 has an upper brick 2U and a lower brick 2L. A heat storage chamber is formed inside the lower brick 2L, and a combustion chamber and a carbonization chamber are alternately formed inside the upper brick 2U in the direction of the furnace leader.
The furnace body foundation 3 is a strong structure built on the ground. Flues 5 extending in the direction of the head of the furnace are formed on both sides of the furnace body 2, and the upper surface thereof is formed flat. The upper surface of the flue 5 is formed slightly below the upper surface of the furnace body foundation 3 described above. An extruder moving path 6 extending in the direction of the furnace leader is formed along the flue 5 on the left side of the figure.

In the present embodiment, the upper furnace body 2 (old furnace body 2P) is removed leaving the furnace body foundation 3 below the line P in the figure, and a plurality of furnace body blocks 4 (see FIG. 1) are arranged at the traces. , These are connected to construct a new furnace body 2 (new furnace body 2N).
The furnace body block 4 is a block obtained by dividing the furnace body 2 of the coke oven 1 into a plurality of blocks in the direction of the furnace leader. As shown in FIGS. 4, 5 and 6, the furnace body block 4 has a complete furnace body unit (lower heat storage chamber, upper combustion chamber and carbonization chamber) in the furnace length direction, and this furnace A plurality of body units (five in this embodiment) are arranged in parallel in the direction of the furnace leader.

[Outline of repair procedure]
FIG. 3 shows a repair procedure of the coke oven 1 in the present embodiment.
In FIG. 3, in the present embodiment, the work site A2 is prepared in a state where the old furnace body 2P is operating at the installation site A1 (old furnace body operation process S0) (work site installation process S1). Then, at the work site A2, the production of the furnace body block 4 to be the new furnace body 2N is started (new furnace body manufacturing process S2).
A transport path A3 is installed in parallel with the new furnace body manufacturing step S2 (transport path installation step S3).

When a predetermined number of furnace body blocks 4 can be transported in the new furnace body manufacturing process S2 and the transfer path A3 is ready, the old furnace body operation process S0 is stopped and the removal of the old furnace body 2P is started (old furnace). Body removal step S4).
When the removal of a part of the furnace body 2 progresses and the furnace body block 4 becomes acceptable, the furnace body block 4 is sequentially transported from the work site A2 to the installation site A1 by the transport path A3 (furnace). Body block transport step S5). Then, at the work site A2, the transported furnace body block 4 is transferred to the furnace body foundation 3 and sequentially connected to form a new furnace body 2N (reactor body block installation step S6).
The new furnace body manufacturing process S2 ends when a required number of furnace body blocks 4 can be manufactured. The furnace body block transfer step S5 ends when all the furnace body blocks 4 have been transferred.

By each of the steps S1 to S6 as described above, a plurality of furnace body blocks 4 are arranged on the furnace body foundation 3 in the direction of the furnace group leader, and a series of new furnace bodies 2N is completed by making each of them continuous.
Then, when the finishing such as the connection of the peripheral devices to the furnace body 2 is completed, the operation in the new furnace body 2N is started (new furnace body operation step S7).
As a result, the new furnace body 2N is reconstructed on the furnace body foundation 3 where the old furnace body 2P was removed, and the repair of the coke furnace 1 is completed.

In the present embodiment, the operation stop period of the coke oven 1 is a period from the stop of the old furnace body operation process S0 to the start of the new furnace body operation process S7. At this time, by separately performing the new furnace body manufacturing process S2 at the work site A2, a part of the new furnace body manufacturing process S2 can be started before the old furnace body operating process S0 is stopped, and the operation stop period is not affected.
Further, by simultaneously executing the old furnace body removal step S4, the furnace body block transfer step S5, and the furnace body block installation step S6 in parallel, the operation stop period can be further shortened.
Hereinafter, in the present embodiment, a detailed configuration for realizing the above-mentioned repair will be described.

[Manufacturing of furnace block 4]
The furnace body block 4 is manufactured at the work site A2 (new furnace body manufacturing process S2). The work site A2 is installed in the vicinity of the installation site A1 in which the coke oven 1 operates (work site installation process S1).

In FIGS. 4 and 5, a work building 10 is constructed at the work site A2.
The work building 10 has a work stage 11 inside which the number of furnace blocks 4 required for the furnace body 2 can be arranged in parallel. The work stage 11 is reinforced with piles or the like driven into the ground, and has sufficient rigidity against the load of the furnace body block 4. Sufficient work spaces 12 are secured on both sides of the work stage 11. A working crane 13 is arranged in the work space 12.

In the work stage 11, the furnace body blocks 4 are manufactured on the mobile pedestals 20, respectively.
A steel base 30 is placed on the upper surface of the mobile mount 20.
In the furnace body block 4, a lower brick 2L is stacked on a steel base 30 to form a heat storage chamber inside, and an upper brick 2U is stacked on the lower brick 2L, and a combustion chamber and a carbonization chamber are formed inside the furnace block 4. Manufactured by The steel base 30 is a part of the furnace body block 4 and constitutes the bottom surface thereof.

[Mobile stand 20 for transporting the furnace body block 4]
As shown in FIGS. 5 and 6, the mobile pedestal 20 has a steel material framed, and the upper surface is formed flat and a space 22 is formed between the columns 21.
The dolly 23 used in the furnace body block transfer step S5 can enter the space 22.

As shown in FIGS. 7 and 8, in the present embodiment, four rows of spaces 22 are formed in the mobile pedestal 20, and a dolly 23 is introduced into each of the spaces 22 during transportation.
The dolly 23 in each row is made up of two dollies with four wheels and six axes, and further connected with four wheels and three axes.
The dolly 23 in each row is coordinatedly controlled by a cockpit installed in one of them. Then, the moving pedestal 20 can be moved by raising the upper surface of the dolly 23 to lift the ceiling of the space 22 and traveling in this state.

[Steel base 30 of furnace body block 4]
The steel base 30 is formed by framing a steel material, and has a flat upper surface and a space 31 on the lower surface side.
The air caster 32 used in the furnace body block transfer step S5 is housed in the space 31.
The air casters 32 are installed in 6 rows (see FIG. 7) in the short side direction and 11 rows (see FIG. 8) in the long side direction of the steel base 30.

As shown in FIG. 9, the upper surface of the air caster 32 is lowered in the deflated state, and the air caster 32 can be inserted into the space 31.
On the other hand, by supplying pressurized air, as shown in FIG. 10, the ring-shaped skirt along the outer circumference of the air caster 32 expands, and the upper surface rises to lift the ceiling of the space 31.
In the air caster 32, the air inflated by the skirt flows out from the center of the lower surface toward the outer circumference. As a result, the lower surface of the air caster 32 and its supporting surface (here, the upper surface of the moving pedestal 20) are load-supported by a thin air film, and can move in the horizontal direction without frictional resistance.

When the furnace body block 4 is lifted and supported by the air casters 32, among the air casters 32 arranged on the lower surface of the steel base 30, those along the outer periphery of the steel base 30 are raised in height. , The steel base 30 is controlled so as to gradually decrease toward the center.
By such control, the steel base 30 is gently curved so that the peripheral portion of the upper surface is high and the central portion is low. Then, due to the curvature of the steel base 30, in the brickwork structure stacked on the upper surface of the steel base 30, a compressive force is applied between the joints of the bricks, and the bricks are transported as the furnace body block 4. It is effective in preventing joint breakage.
The lifting of the furnace body block 4 by the air casters 32 is started when the direction of the furnace body block 4 is changed, which will be described later, and continues until the transfer to the furnace body foundation 3.

The steel base 30 is formed with a cavity 33 as a heat transfer mitigation means.
As shown in each of FIGS. 6 to 10, the cavity 33 is formed inside the steel base 30 along the upper surface of the steel base 30 over the entire surface of the steel base 30.
With such a cavity 33, when the coke oven 1 is operated, the heat transfer from the brickwork portion to the steel base 30 is alleviated, and the influence of heat on the steel base 30 can be alleviated.
As the heat transfer mitigation means, a heat insulating material layer in which the cavity 33 is filled with a heat insulating material, a cooling pipe for water cooling or air cooling, or the like may be installed.

[Transportation of furnace body block 4]
The furnace body block 4 is transported from the work site A2 through the transfer path A3 to the installation site A1 (reactor block transfer step S5).
In FIG. 11, at the installation site A1, the old furnace body 2P is removed (old furnace body removal step S4), and the furnace body foundation 3 is left in the trace. Actually, in order to perform the parallel work, the transportation of the furnace body block 4 is started in a state where some of the old furnace bodies 2P have not been removed.

The transport path A3 has a continuous passage 41 from the work site A2 to the installation site A1.
In the present embodiment, the passage 41 is a paved surface that is flat and has sufficient strength so that the dolly 23 described above can pass through while supporting the mobile pedestal 20 and the furnace body block 4.
The end of the passage 41 on the installation site A1 side is connected to one end of the extruder moving path 6, and the extruder moving path 6 is used as a part of the conveying path A3.

As shown in FIGS. 11 and 12, the transport path A3 is a connecting stand 42 installed between the extruder moving path 6 and the furnace body foundation 3 (upper surface of the flue 5) and the extruder moving path 6. It has an auxiliary pedestal 43 installed on the opposite side of the connecting pedestal 42.
The heights of the connecting pedestal 42 and the auxiliary pedestal 43 are set to be the same as the upper surface of the furnace body foundation 3.

Further, the height of the moving platform 20 is set to be the same as the upper surface of the furnace body foundation 3 when introduced into the extruder moving path 6.
Therefore, the upper surface of the moving pedestal 20 introduced into the extruder moving path 6, the upper surface of the connecting pedestal 42, the upper surface of the auxiliary pedestal 43, and the upper surface of the furnace body foundation 3 can all form a continuous flat surface at the same height. it can.

[Change of direction of furnace body block 4]
As shown in FIG. 13, in the present embodiment, the furnace body block 4 transported by the mobile gantry 20 has the furnace body foundation 3 in the furnace length direction of the furnace body block 4 so that the furnace body block 4 can be introduced into the extruder moving path 6. It is said to be in the direction of the fire brigade leader. Therefore, as shown in FIG. 14, after being introduced into the extruder moving path 6, the direction of the furnace body block 4 is changed to a right angle.

In FIG. 13, the mobile gantry 20 is stopped at a position facing a predetermined installation position of the furnace body foundation 3 according to the mounted furnace body block 4, and the support by the dolly 23 is released. As a result, the moving platform 20 is supported on the bottom surface of the extruder moving path 6.
In this state, the connecting pedestal 42 and the auxiliary pedestal 43 are arranged on both sides of the moving pedestal 20, and the upper surfaces of the connecting pedestals 42 and the auxiliary pedestals 43 are adjusted to be flat.

Further, on the upper surface of the furnace body foundation 3, six rows of floor rails 44 corresponding to the air casters 32 on the lower surface of the steel base 30 are laid.
The floor rail 44 is a metal plate material having a smooth surface, and is installed at a predetermined position on the furnace body foundation 3 according to the installation site of the furnace body block 4 to be transferred next.

In FIG. 14, pressurized air is supplied to the air casters 32 so that the steel base 30 or the furnace body block 4 is slidable on the upper surface of the mobile pedestal 20.
In this state, the steel base 30 or the furnace body block 4 is rotated to change the direction to the state shown by the alternate long and short dash line in FIG.
By this change of direction, the furnace length direction of the furnace body block 4 is aligned with the furnace length direction of the furnace body foundation 3 (that is, the furnace length direction of the furnace body 2).

The intermediate portion of the redirected furnace body block 4 remains supported by the moving pedestal 20, but the side closer to the furnace body foundation 3 is mounted on the connecting pedestal 42, and the side far from the furnace body foundation 3 is the auxiliary pedestal 43. Can be placed on.
At this time, the air caster 32 passes through the joint between the moving pedestal 20 and the connecting pedestal 42 and the joint between the moving pedestal 20 and the auxiliary pedestal 43.
Therefore, these seams are kept flat and without gaps so that the air casters 32 can pass smoothly.

[Transfer of furnace block 4]
As shown in FIGS. 15 and 16, the changed-direction furnace body block 4 is transferred onto the furnace body foundation 3 by moving in the furnace length direction.
At the time of relocation, first, the direction-changed furnace body block 4 is positioned so that the air casters 32 on the lower surface of the steel base 30 are on the extension lines of the six rows of floor rails 44 (the furnace of the furnace body foundation 3). Adjust the position in the direction of the leader).

Further, a center hole jack 45 is installed on the opposite side of the furnace body foundation 3 from the moving stand 20. Then, the wire from the center hole jack 45 is stretched along the outermost two of the six rows of floor rails 44 and connected to the steel base 30 of the furnace body block 4.
In this state, the center hole jack 45 is operated to pull the furnace body block 4. By this traction, the furnace body block 4 moves from the top of the moving pedestal 20 to the floor rail 44 via the connecting pedestal 42, and is carried onto the furnace body foundation 3.

After the furnace body block 4 can be placed on the furnace body foundation 3, after accurate positioning with respect to the furnace body foundation 3, the lifting by the air caster 32 is stopped and the furnace body block 4 is landed on the furnace body foundation 3. Let me. As a result, the transfer of the furnace body block 4 onto the furnace body foundation 3 is completed. The air casters 32 that have completed the work are sequentially pulled out from the lower surface of the steel base 30.

The furnace body block transfer step S5 of the furnace body block 4 is completed by the above-described transfer by the mobile stand 20, the direction change of the furnace body block 4, and the transfer to the furnace body foundation 3.
Such a furnace body block transfer step S5 is repeated for all the furnace body blocks 4.

[Installation of furnace block 4]
The furnace body block 4 installed on the furnace body foundation 3 is interconnected with the adjacent furnace body block 4, whereby a new furnace body 2N is formed (reactor body block installation step S6).
As shown in FIG. 17, a plurality of furnace body blocks 4 are arranged on the furnace body foundation 3.

A gap is formed in advance between the furnace body blocks 4, and bricks 2J for seams are piled up in this gap. Adjacent furnace body blocks 4 are connected to each other by such a brick 2J for the seam, and a series of new furnace bodies 2N are formed.
Then, by arranging all the furnace body blocks 4 on the furnace body foundation 3 and connecting them to each other, the furnace body block installation step S6 is completed, and the new furnace body 2N is completed.

After that, when finishing such as connection of peripheral devices to the new furnace body 2N is completed, the operation in the new furnace body 2N is started (new furnace body operation step S7).
As a result, the new furnace body 2N is reconstructed on the furnace body foundation 3 where the old furnace body 2P was removed, and the repair of the coke furnace 1 is completed.

[Effect of Embodiment]
According to this embodiment, the following effects can be obtained.
In the present embodiment, a furnace body block 4 obtained by dividing the furnace body 2 of the coke oven 1 into a plurality of parts is used, and such a furnace body block 4 is manufactured in the new furnace body manufacturing step S2 and installed in the furnace body block transporting step S5. A new furnace body can be formed at the installation site A1 by transporting the furnace body to the site A1 and sequentially connecting the furnace body blocks 4 to each other in the furnace body block installation step S6.

In the present embodiment, while the old furnace body is in operation (the old furnace body operation step S0 is being executed), the work site installation process S1 is performed, and then the new furnace body manufacturing process S2 is started. Therefore, the period from the start of the new furnace body manufacturing process S2 to the stoppage of the old furnace body operation process S0 is not included in the operation stoppage period.
The operation stop period of the coke oven is the period from the stop of the old furnace body operation process S0, that is, the start of the old furnace body removal step S4, to the start of the new furnace body operation process S7, that is, the completion of the furnace body block installation process S6. Become.

Therefore, according to the present embodiment, it is possible to shorten the operation suspension period at the time of repairing the coke oven 1. For example, the operation suspension period, which was conventionally required for 18 months, can be shortened by about 5 months to about 13 months.

In the present embodiment, by using the steel base 30, the furnace body block 4 can be reliably transported.
If there is no steel base 30, the furnace body block 4 is only made of bricks, and there is a possibility that the joints will be cut or collapsed during transportation. However, in the present embodiment, since the steel base 30 is continuous at the bottom of the furnace body block 4, the brickwork portion constructed on the steel base 30 can also be transported.
Further, in the present embodiment, in the furnace body block transfer step S5, the height control of the air casters 32 on the outer peripheral side and the inner side of the steel base 30 causes an external force such that a compressive load is applied to the brickwork on the steel base 30. Can be added, and the prevention of joint breakage can be made more effective.

In the present embodiment, since the cavity 33 as the heat transfer mitigation means is formed in the steel base 30, the heat transfer from the combustion chamber and the carbonization chamber to the steel base 30 can be mitigated during the operation of the new furnace body 2N. it can.
That is, in the furnace body block installation step S6, the furnace body blocks 4 are connected to form a new furnace body 2N, so that the steel base 30 of the furnace body block 4 is embedded as a part of the new furnace body 2N. Then, in the operating state, heat from the combustion chamber and the carbonization chamber is transferred to the steel base 30. If there is such heat transfer, the steel base 30 may be deformed or the like.
However, in the present embodiment, the heat transfer mitigation means using the cavity 33 can alleviate the heat transfer to the steel base 30, so that the influence on the steel base 30 can be minimized.

In the present embodiment, in the furnace body block 4, five furnace body units in which half-divided carbonization chambers are formed on both sides of the combustion chamber are formed in parallel.
Therefore, in the furnace body block installation step S6, only half of the carbonization chambers of the adjacent furnace body blocks 4 may be connected to each other, and the brick stacking of the brick 2J for the seam can be simplified.
That is, since the carbonization chamber has a simple structure with less brickwork, it is suitable for cutting, and the work load can be reduced when connecting the furnace blocks in the furnace block installation process.

In the present embodiment, as a part of the transport path A3, the extruder moving path 6 extending in the direction of the furnace group leader along the furnace body foundation 3 is used.
The extruder moving path 6 is usually installed along the furnace body foundation 3 of the coke oven 1, and by utilizing this extruder moving path 6, even in the coke oven 1 in which various facilities are densely packed around. The transport path A3 can be easily secured.

Further, in the furnace body block transfer step S5 of the present embodiment, the furnace body block 4 is moved along the extruder moving path 6 in a state where the furnace length direction of the furnace body block 4 is the furnace group length direction of the furnace body foundation 3. When the part to be installed is reached, the direction of the furnace body block 4 is changed so that the furnace length direction is the furnace length direction of the furnace body foundation 3, and further, the furnace body block 4 is directed toward the furnace length. It was moved and transferred onto the furnace body foundation 3.

In this way, when the extruder moving path 6 is conveyed, the furnace body block 4 is oriented so that the furnace length direction thereof is the furnace head direction of the furnace body foundation 3, so that a sufficient width cannot be easily obtained. The furnace body block 4 can also be passed through the machine movement path 6.
If the width of the extruder moving path 6 is wide, the number of gates of the furnace body unit of the furnace body block 4 can be increased, and if the width of the extruder moving path 6 is narrow, the number of furnace units of the furnace body block 4 can be increased. By making adjustments such as reducing the number of gates, it is possible to respond flexibly.

In the present embodiment, in the furnace body block transfer step S5, a mobile stand 20 on which the furnace body block 4 including the steel base 30 is placed is used. Further, the dolly 23 was used when the moving frame 20 and the furnace body block 4 were integrally moved.
By using such a moving platform 20 and a dolly 23, it is possible to simplify the ground reinforcement of the passage 41 of the transport path A3, that is, the section moved by the dolly 23.

In the present embodiment, when the furnace body block 4 is carried in or out on the moving pedestal 20, the air caster 32 is used between the steel base 30 and the upper surface of the moving pedestal 20.
By using such an air caster 32, it is possible to easily change the direction of the furnace body block 4 on the mobile gantry 20 and transfer it to the furnace body foundation 3.

In the present embodiment, when the furnace body block 4 is supported by the air casters 32, the lifting height is controlled to be relatively high around the steel base 30 and relatively low near the center, thereby being made of steel. A compressive force can be applied to the brickwork structure on the base 30, and the effect of preventing joint breakage can also be obtained.

In the present embodiment, in addition to shortening the operation stoppage period by starting the new furnace body manufacturing process S2 while the old furnace body is in operation (during the execution of the old furnace body operating step S0), the new furnace body is manufactured. By overlapping the process S2, the old furnace body removal step S4, the furnace body block transfer step S5, and the furnace body block installation step S6 with each other for a period of time, the operation suspension period can be further shortened.

That is, it is possible to perform parallel processing in which the old furnace body operation step S0 or the old furnace body removal step S4 is performed at the installation site A1 and the furnace body block 4 is manufactured in the new furnace body manufacturing process S2, and the coke furnace. The old furnace body removal step S4 was performed in a part of 1, and the furnace body block 4 was carried into the adjacent furnace body foundation 3 from which the old furnace body 2P had already been removed (further body block transport step S5), and was already carried in. Multiple parallel processes such as performing the furnace block installation step S6 on the furnace block 4 can be performed.
By such parallel processing, the operation suspension period can be further shortened.

[Modification example]
The present invention is not limited to the above-described embodiment, and modifications within the range in which the object of the present invention can be achieved are included in the present invention.
In the above-described embodiment, the operation suspension period is further shortened by overlapping the new furnace body manufacturing process S2, the old furnace body removing step S4, the furnace body block transporting process S5, and the furnace body block installation step S6 with each other for a period of time. .. However, the degree of duplication and the process of parallel processing may be appropriately changed in the implementation.

For example, after all the furnace body blocks 4 can be manufactured in the new furnace body manufacturing process S2, the old furnace body removing step S4, the furnace body block transporting step S5, and the furnace body block installation step S6 may be processed in parallel. The old furnace body removal step S4 may be carried out in accordance with the completion time of the furnace body manufacturing step S2, and then the furnace body block transfer step S5 and the furnace body block installation step S6 may be repeated in parallel.

In the above-described embodiment, the furnace body blocks 4 are arranged one-dimensionally in the furnace head direction as the work site A2 in the work site installation step S1, but vertically and horizontally, that is, two dimensions in the furnace head direction and the furnace length direction of the furnace body block 4. It may be arranged as a target.

In the above embodiment, in the new furnace body manufacturing process S2, the furnace body block 4 is manufactured in advance on the moving pedestal 20, but a steel base 30 is formed on the fixed pedestal and brick-stacked on the fixed pedestal to form a furnace. The body block 4 may be formed, and the furnace body block 4 may be transferred to the mobile stand 20 by the air caster 32.

In the above embodiment, in the furnace body block transfer step S5, the moving pedestal 20 is moved by the dolly 23, and the air caster 32 is used for transferring from the moving pedestal 20 to the furnace body foundation 3, but the transfer is different for these. Means may be used.
For example, for the transfer from the work site A2 to the extruder moving path 6, instead of the dolly 23, a sliding transfer means using a low friction plate and a jack for towing may be used. Further, the same sliding type transport means may be used for the transfer from the mobile stand 20 to the furnace body foundation 3.

In the above embodiment, the extruder moving path 6 is used as a part of the conveying path A3, but this is not essential. In addition, if a suitable space can be secured as the transport path A3, it can be used. Then, if sufficient space can be obtained, the dimensional restriction of the furnace body block 4 can be released, and the transport path A3 is set in the furnace length direction of the furnace body foundation 3, and the furnace body block 4 as in the above embodiment The change of direction can also be omitted.

In the above embodiment, a connecting pedestal 42 is used between the mobile pedestal 20 and the furnace body foundation 3, and an auxiliary pedestal 43 is used on the opposite side thereof. However, if it is not necessary to change the direction of the furnace body block 4, or if the mobile gantry 20 can be made sufficiently large, the auxiliary gantry 43 may be omitted. Further, if the mobile pedestal 20 can be sufficiently brought close to the furnace body foundation 3, the connecting pedestal 42 can also be omitted.

In the above embodiment, as the furnace body block 4, five furnace body units in which half-divided carbonization chambers are formed on both sides of the combustion chamber are formed in parallel, but these may be appropriately changed. For example, the number of gates may be changed according to the dimensional restrictions such as the extruder moving path 6 or the load restrictions of the conveying means.

The present invention can be used for a coke oven for reconstructing a new furnace body after dismantling the old furnace body and for repairing the coke oven.

1 ... Coke furnace, 10 ... Work building, 11 ... Work stage, 12 ... Work space, 13 ... Crane, 2 ... Furnace, 20 ... Mobile mount, 21 ... Support, 22 ... Space, 23 ... Dolly, 2J ... Seam Brick for, 2L ... Lower brick, 2N ... New furnace body, 2P ... Old furnace body, 2U ... Upper brick, 3 ... Furnace foundation, 30 ... Steel base, 31 ... Space, 32 ... Air caster, 33 ... Den Cavity as a heat relaxation means, 4 ... furnace block, 41 ... passage, 42 ... connection stand, 43 ... auxiliary stand, 44 ... floor rail, 45 ... center hole jack, 5 ... flue, 6 ... extruder movement path, A1 ... installation site, A2 ... work site, A3 ... transfer path, S0 ... old furnace body operation process, S1 ... work site installation process, S2 ... new furnace body manufacturing process, S3 ... transfer path installation process, S4 ... old furnace body Removal process, S5 ... furnace block transfer process, S6 ... furnace block installation process, S7 ... new furnace body operation process.

Claims (7)

It is a coke oven formed by reconstructing a new furnace body on the furnace body foundation left after dismantling the old furnace body at the installation site.
The new furnace body is manufactured by dividing it into a plurality of furnace body blocks having a lower heat storage chamber, an upper combustion chamber and a carbonization chamber formed and having a furnace body unit completed in the furnace length direction . A coke oven characterized in that a furnace body brick is stacked on a steel base, and the steel base is incorporated into the new furnace body as a part of the furnace body block. It is a method of repairing a coke oven in which the old furnace body at the installation site is dismantled and the new furnace body is reconstructed on the remaining furnace body foundation.
The work site installation process that installs the work site around the installation site, and
At the work site, the new furnace body is divided into a plurality of furnace body blocks having a lower heat storage chamber, an upper combustion chamber, and a carbonization chamber and having a furnace body unit completed in the furnace length direction. Body manufacturing process and
A transport route installation process for installing a transport route from the work site to the installation site,
The old furnace body removal step of removing the old furnace body from the furnace body foundation at the installation site, and
A furnace block transport process for transporting the furnace block to the installation site by the transport route,
At the installation site, there is a furnace body block installation step of fixing the furnace body block to the furnace body foundation and connecting the adjacent furnace body blocks to each other.
The new furnace body manufacturing process is started during the operation of the old furnace body, and the furnace body block is constructed by stacking the furnace body bricks on the steel base, and the steel base is the furnace body block. A method for repairing a coke oven, which is characterized by being incorporated into the new furnace body as a part of the above. In the method for repairing a coke oven according to claim 2.
The furnace body block, refurbishment method of the coke oven, characterized in that it comprises a heat transfer mitigation means for mitigating the heat transfer from the brickwork portion to the steel base. In the method for repairing a coke oven according to claim 2 or 3.
The furnace body block, refurbishment method of the coke oven, wherein said at that the furnace body unit the coking chamber is formed of a half on either side of the combustion chamber is formed in a plurality Gate parallel. In the method for repairing a coke oven according to any one of claims 2 to 4.
As the transport path, an extruder moving path extending in the direction of the furnace group leader along the furnace body foundation is used, and the transfer path is
In the furnace body block transfer step, a portion to be installed by moving the furnace body block along the extruder moving path in a state where the furnace length direction of the furnace body block is the furnace group length direction of the furnace body foundation. When the temperature is reached, the direction of the furnace body block is changed so that the direction of the furnace body block is the direction of the furnace body base, and the furnace body block is moved toward the furnace body base. A method of repairing a coke oven, which is characterized by being carried on top of. In the method for repairing a coke oven according to any one of claims 2 to 5.
In the furnace body block transfer step, a moving pedestal on which the furnace body block is placed is used, and when the furnace body block is carried in or out on the moving pedestal, the steel base and the upper surface of the moving pedestal are used. A method for repairing a coke oven, which comprises installing an air caster between the two and using a dolly when moving the moving pedestal and the furnace body block. In the method for repairing a coke oven according to any one of claims 2 to 6.
A method for repairing a coke oven, wherein the new furnace body manufacturing step, the old furnace body removing step, the furnace body block transporting step, and the furnace body block installation step are overlapped with each other for a period of time.

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