JP2000180070A - Method and system for dismantling inner wall refractries of vertical furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dismantle refractories on the inner wall of a vertical furnace in a short time in safety by moving a base up and down by means of a vertical post standing on a base board arranged with jacks at the outer circumferential fringe part and on the bottom face, and a chain hoist mechanism coupled with the base arranged thereon movably up and down. SOLUTION: A dismantling unit 2 is disposed in a dry cork production furnace 1 in order to dismantle inner wall refractories 14 of a furnace. The furnace 1 has open top for convenience of dismantling the inner wall of the furnace. The dismantling unit 2 comprises a first base board 3 arranged in the furnace 1, a vertical post 4 standing thereon, a base 5 arranged thereon movably up and down, and a chain hoist mechanism 8 disposed above the vertical post 4. The vertical post 4 has lower end coupled with the first base board 3 and upper end coupled with a frame 9 of the chain hoist mechanism 8. A worker is not required to enter into the furnace and can work in safety and the work progresses quickly and terminates in a short time because a powerful destruction force is provided from a hydraulic power source.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for dismantling furnace refractories in a large vertical furnace for dismantling furnace refractories.

[0002]

2. Description of the Related Art Conventionally, when a large vertical furnace having a cavity therein, such as a combustion chamber of a hot blast stove or a furnace inner wall of a dry coke making furnace, is dismantled using a heavy dismantling machine, a conventional method is used. As described in Japanese Patent Publication No. 45-19468, a dedicated gantry is provided in a furnace and a heavy dismantling machine is mounted on the dedicated gantry, or as described in JP-A-8-22638. The furnace is filled with granulated slag, a heavy dismantling machine is mounted on the granulated slag upper surface, and the furnace refractories are dismantled from the dedicated stand or the slag upper surface.

[0003] Here, in the case of disassembling the furnace wall refractories by providing a dedicated stand, after disassembling the furnace wall refractories in a predetermined height range, the used dedicated stand is taken out of the furnace, and the next step is performed. Lowering the dedicated gantry so as to disassemble the furnace inner wall refractories within a predetermined height range is sequentially repeated to dismantle and remove the furnace inner wall refractories from above to below the vertical furnace.

On the other hand, when disassembling the furnace wall refractories by filling the furnace with granulated slag, the furnace wall refractories in a predetermined height range are dismantled, and then a part of the granulated slag and dismantled chips are removed. Discharging the furnace refractories from the furnace and disassembling the furnace refractories in the next predetermined height range is sequentially repeated to dismantle and remove the furnace refractories from above to below the vertical furnace.

However, in the former, there is a problem that the production cost of the dedicated gantry is expensive, and that the installation and removal of the support gantry for the dedicated gantry requires a great deal of cost and time. Further, in the latter case, there is a problem that since the amount of granulated slag required for filling the furnace is enormous, it takes enormous cost and time to carry in and carry out the granulated slag.
Usually, vertical furnaces are the core equipment of production equipment,
Long-term downtime affects the operation of the entire production facility, and the downtime results in significant economic losses. Under the circumstances described above, there has been a demand for the development of a new technology capable of safely dismantling a refractory in a vertical furnace in a short time.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus and a method for safely disassembling a furnace inner wall refractory in a vertical furnace in a short time.

[0007]

SUMMARY OF THE INVENTION In order to solve the above problems, the gist of the present invention is as follows. (1) Mainly, a first base on which jacks are arranged on an outer edge and a bottom, and a vertical support provided on the first base,
A pedestal arranged vertically on the vertical support, and a chain winding mechanism provided above the vertical support, the pedestal is provided with a second base rotatable around the vertical support, On the base, a refractible first boom with a breaker at the tip and a refractible second boom with a claw bucket at the tip are arranged at positions facing each other across the vertical support, and connected to the pedestal A vertical furnace inner wall refractory dismantling device having a structure capable of raising and lowering a pedestal by raising and lowering a chain by a chain winding mechanism. (2) The vertical furnace inner wall refractory dismantling apparatus according to the above (1), wherein the vertical support is constituted by connecting a plurality of short supports. (3) The vertical furnace inner wall refractory dismantling device according to the above (1) or (2), wherein a guide rail is provided on a side surface of the vertical support. (4) A method for dismantling a vertical furnace inner wall refractory by using the vertical furnace inner wall refractory dismantling apparatus according to (1), (2) or (3). (5) The method for dismantling a vertical furnace inner wall refractory according to the above (4), wherein disassembling is performed after the first base is buried in one or both of sand and gravel.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
Since the vertical furnace inner wall refractory dismantling device according to the present invention mainly includes a first base, a vertical support, a pedestal, and a chain winding mechanism, the structure is simple, and the structure is easy to disassemble and assemble. You can also. The apparatus of the present invention, which has a structure that is easy to disassemble and assemble, is transported in a disassembled state around a vertical furnace such as a dry coke oven, and is sequentially carried into the furnace from the furnace top by a crane of a tow truck to be assembled in the furnace. You may.

The first base has jacks arranged on the outer edge and the bottom surface. The first base carried into the vertical furnace can be fixed to the furnace bottom by these jacks.
The first base may have, for example, a structure in which radial frames are combined.

A vertical support is set up on the first base and fixed. Here, to make the structure of the vertical strut by connecting a plurality of short struts,
It is preferable from the viewpoint of assembly and disassembly. Further, a structure may be employed in which a short support is fixed on the first base in advance, and a support constituting the remaining part of the vertical support may be connected to this structure.

Here, if a guide rail parallel to the axis of the vertical support is provided on the side surface of the vertical support and a pedestal described later moves up and down according to this guide rail, the pedestal can be moved stably. For example, four guide rails may be arranged at 90 ° intervals with respect to the center axis of the vertical support.

[0012] The pedestal is arranged vertically on the vertical support. The pedestal may have, for example, a cylindrical shape in which a vertical column is inserted through a hollow portion, or a structure in which the vertical column is sandwiched by a plurality of members.

The pedestal is provided with a second base rotatable around a vertical support, and the second base is provided with a first boom with a breaker at the tip and a free boom with a claw bucket at the tip. The second boom is disposed at a position opposite to the vertical boom. The device of the present invention destroys the furnace inner wall refractory with the breaker and the claw bucket. Since the breaker and the claw bucket are respectively disposed at the distal ends of the first and second booms that can be freely bent, the operating positions of the breaker and the claw bucket can be highly controlled by driving them. Further, since the second base on which the first and second booms are arranged is rotatable around the vertical support, the breaker and the claw bucket can be made to work in any direction on the furnace inner wall. . On the other hand, since the second gantry is provided on a pedestal arranged vertically, the operating position of the breaker and the claw bucket can be set to an arbitrary height by raising and lowering the pedestal. Here, the first and second booms, breakers, and claw buckets may be hydraulically driven mechanisms. The hydraulic pressure is also effective as a driving force for rotating the second base.

Further, the first boom and the second boom are arranged at positions facing each other with the vertical support interposed therebetween. Here, after the claw bucket provided at the tip of the second boom is brought into contact with the inner wall of the furnace, the breaker provided at the tip of the first boom is driven to break the refractory of the inner wall of the furnace. Can be received by the craw bucket. Therefore, even if the dismantling work is performed at a position apart from the fixed end of the vertical support, for example, the bending of the vertical support caused by the reaction force from the breaker acting on the vertical support can be reduced, and the dismantling work can be performed smoothly. .

The chain hoisting mechanism is provided above the vertical support and has a structure in which the pedestal can be moved up and down by hoisting and lowering a chain connected to the pedestal. Here, it goes without saying that the pedestal may be moved up and down using a wire or the like instead of the chain. Further, the connection between the chain and the pedestal may be a direct method such as fixing one end of the chain to the pedestal, or an indirect method such as attaching the chain to a chain wheel or the like provided on the pedestal. It may be.

The apparatus of the present invention constructed as described above is carried into a vertical furnace, or is further assembled and disposed at a predetermined position, and then dismantles the refractory on the inner wall of the furnace by remote control from outside the furnace. . Here, if the first base is buried in one or both of sand and gravel and then dismantled, it is possible to prevent debris from falling on the first base and damaging the first base. it can. On the other hand, the debris that has dropped onto the hearth is discharged out of the furnace as follows. That is, after lowering the pedestal, the belt conveyor is inserted into the furnace from the manhole of the hearth, and the scraps are loaded on the belt conveyor by the claw bucket and discharged out of the furnace.

[0017]

Next, a description will be given of an embodiment of disassembling the refractory of the inner wall of the dry coke making furnace according to the present invention. FIG.
1 is a drawing showing a state in which a dismantling device 2 according to an embodiment of the present invention is installed in a dry coke making furnace 1 and a furnace inner wall refractory 14 is dismantled. Dry coke making furnace 1 in the figure
The furnace top is open for the purpose of dismantling the furnace inner wall.
The demolition apparatus 2 of this embodiment includes a first base 3 disposed in a dry coke making furnace 1, a vertical support 4 erected in the center of the first base 3, and a vertical support 4 arranged vertically. Pedestal 5 and a chain hoisting mechanism 8 provided above the vertical support. The lower end of the vertical support 4 is the first base 3
Above, the upper end is a base 9 provided with a chain winding mechanism 8.
Are connected and fixed respectively. The pedestal 5 is provided with a second base 6 that is rotatable around a vertical support,
On the second base 6, a refractible first boom 10 having a breaker 31 at the tip and a refractible second boom 11 having a claw bucket 33 at the tip are disposed at positions facing each other with the vertical support 4 interposed therebetween. ing. The pedestal 5 is provided with a chain wheel 19, and the chain wheel 19 has a chain hoisting mechanism 8 attached thereto.
Is connected to the chain 18.

A procedure for assembling the disassembly apparatus 2 of this embodiment will be described with reference to FIGS. First, as shown in FIG.
The top of the dry coke making furnace 1 is released and its open hole 25 is opened.
Then, the frame 24 is suspended from the hearth by a crane or the like, and these frames 24 are arranged on the jack 16. These frames are radially combined and fastened with bolts to form the base 3. Here, the jack 17 provided on the outer edge of the base 3 is adjusted so that the position where the lower vertical column 23 on the base 3 is attached is located near the center of the open hole 25 on the furnace top.

Next, the lower vertical support 23 is suspended from the open hole 25 by a crane and attached to the base 3 arranged on the furnace bottom. Here, the jack 1 placed under the base 3
6 is adjusted so that the lower vertical support 23 attached to the base 3 stands vertically.

After the lower vertical support 23 is erected, the pedestal 5 provided with the second base 6 is suspended by a crane and fitted through the lower vertical support 23, and the pedestal 5 is assembled to the base of the lower vertical support 23. Next, the first boom 10 provided with a breaker 31 and the second boom 1 provided with a claw bucket 33
1 are suspended and attached to predetermined positions on the second base 6 respectively. This state is shown in FIG.

Next, the remaining portion of the vertical support 4 is hung down, and the lower end thereof is fixed to the upper end of the lower vertical support 23 in combination. This state is shown in FIG. As shown in FIG. 4, in the present embodiment, the remaining portion of the vertical support 4 attached to the lower vertical support 23 is formed by combining short materials to be longer.
This may use an integral long material from the beginning.

Thereafter, as shown in FIG. 5, a gantry 9 is set on the furnace top, and a chain winding mechanism 8 is arranged thereon.
The position of the chain winding mechanism 8 is right above the vertical support 4. By connecting the chain 18 of the chain hoisting mechanism 8 and the pedestal 5 thus arranged, the pedestal 5 can be raised by driving the chain hoisting mechanism 8 to wind up the chain 18, and the chain 18 can be lowered. The pedestal 5 can be lowered.

Here, as shown in FIG. 6, sand, gravel, granulated slag, etc. 12 (hereinafter referred to as "sand etc.") are spread on the furnace bottom.
By embedding the base 3 with these, it is possible to prevent the dismantled furnace inner wall refractory from falling and damaging the base 3.
The sand 12 or the like may be carried out before placing the gantry 9 on the furnace top.

Using the dismantling apparatus 2 of this embodiment whose arrangement has been completed as described above, the refractory on the inner wall of the dry coke making furnace 1 is dismantled. Specifically, as shown in FIG. 7, the chain is wound up by a chain winding mechanism 8 not shown in FIG. 7, the pedestal 5 is raised to a predetermined height, and the vertical support 4 is pressed by a lock cylinder 301 described later. After fixing the base 5, the first boom 1
By operating 0, the chisel of the breaker 31 is pressed against the furnace inner wall refractory and vibrated to disassemble the furnace inner wall refractory. In FIG. 7, the claw bucket 33 provided on the second boom 11 is brought into contact with the furnace inner wall on the opposite side to reduce the reaction force received by the vertical support 4 from the breaker 31. Although the dismantled furnace inner wall falls to the furnace bottom, since the base 3 of the dismantling device 2 is buried in sand 12 or the like, the impact force that the falling object gives to the base 3 is absorbed and mitigated by the sand 12 or the like. The base 3 is not damaged.

Since the second base 6 is rotatable around the vertical support, the first boom 10 and the breaker 31 disposed on the second base 6 can be directed in all directions around the inner wall of the furnace inner wall. In addition, the inner wall of the furnace in an altitude range where the chisel of the breaker 31 can reach from the pedestal 5 having a predetermined height can be dismantled over the entire circumference.

On the other hand, as shown in FIG. 10, when 21 pieces of debris accumulate in the furnace bottom, the pedestal 5 is lowered, and the belt conveyor 13 is inserted from the manhole 22 near the furnace bottom. The dismantling waste is loaded on the belt conveyor 13, and the dismantling waste 21 deposited on the furnace bottom is carried out of the furnace.

By repeating such operations while moving the pedestal 5 from the upper part to the lower part in the furnace, the refractory on the inner wall of the dry coke making furnace 1 can be dismantled over the entire inner wall of the furnace. After the disassembly of the furnace inner wall is completed, the disassembling apparatus 2 is taken out of the furnace while disassembling the dismantling apparatus 2 by performing a procedure reverse to the assembling procedure described above.

Next, the structure of the dismantling device 2 according to the present embodiment will be described in detail. FIG. 8 is a drawing showing the structure of the first boom 10 and the breaker 31 provided at the tip thereof, and FIG. 9 is a drawing showing the structure of the second boom 11 and the claw bucket 33 provided at the tip thereof. As shown in the figure, the first boom 10 and the second boom 11 are obtained by adding a protective cover to a structure similar to a mechanical device for excavating the ground, that is, a boom used in a so-called power shovel. By adding the protective cover, the hydraulic cylinder and hydraulic piping of the boom can be kept from being damaged.

As shown in FIG. 8, the first boom 10 mainly includes a main boom 102 and a stick boom 101. As shown in FIG. 8, an inverted groove-shaped protective cover 110 covering a hydraulic cylinder 109 for bending the stick boom 101 up and down is fixed to a side surface of the main boom 102. In addition, on the side surface of the stick boom 101, an inverted groove-shaped protective cover 107 that covers a hydraulic cylinder 106 that refracts the breaker 31 in the vertical direction is fixed.

FIG. 9 shows a state in which the second boom 11 is bent downward. The second boom 11 mainly includes a main boom 202 and a stick boom 201. On the side surface of the main boom 202, as shown in FIG. 9, a reverse groove-shaped protective cover 2 for covering a hydraulic cylinder 209 for bending the stick boom 201 in the vertical direction.
10 is fixed. In addition, on the side surface of the stick boom 201, a reverse groove-shaped protective cover 2 that covers a hydraulic cylinder 206 that refracts the claw bucket 33 in the vertical direction
07 is fixed.

FIG. 11 is a side view showing a state where the pedestal 5 is assembled to the vertical support 4. The vertical support 4 is inserted through the center of the pedestal 5, the pedestal 5 is provided with a donut-shaped plate 303, and a boss 314 is formed along the inner hole.
Is provided. FIG. 12 shows the state shown in FIG.
FIG. In addition, pedestal 5
Has an upper flange 313 at the upper end and a lower flange 312 at the lower end. FIG. 13 is a drawing in which a cross section at a position B in the state shown in FIG. FIG.
11 is a drawing in which a cross section at the position C in the state shown in FIG.

As shown in FIGS. 11 to 14, the vertical support 4 has four guide rails 26 on its surface, and each guide rail 26 is located at a position that divides the circumference of the vertical support 4 into four equal parts. Are located in On the other hand, the upper flange 313 constituting the pedestal 5, the boss 314 of the plate 303, and the lower flange 312 are integrally formed by a frame arranged at a position corresponding to each of the guide rails.
In the drawing, a portion of the frame above the plate 303 is described as an upper frame 311a, and a portion below the plate 303 is described as a lower frame 311b. This upper frame 311a
The lower frame 311b and the lower frame 311b are arranged so as to form an integral frame along each guide rail. Here, the upper frame 311a and the lower frame 31
Below 1b, guide rollers 302 for loosely fitting the guide rails 26 are provided, and stabilize and smooth the movement of the pedestal 5 on the vertical columns 4.

A lock cylinder 301 is fixed near the plate 303.
The pedestal 5 can be fixed at a predetermined height of the vertical support 4 by driving the guide rail 26 by hydraulic pressure to press the outermost surface of the guide rail 26.

A bearing inner ring 308 is fitted on the outer peripheral side of the boss 314 of the plate 303, and a gear 309 is fitted on a bearing outer ring 307 that forms a pair with the inner ring. A donut-shaped second base 6 is fixed to a boss provided on the gear 309. That is, the second base 6
The gear 309 and the gear 309 are integrated so as to be rotatable with respect to the plate 303.

Here, the first boom 10 is mounted on the upper surface of the donut-shaped second base 6 via a bracket 103, and a position opposite to the mounting position of the first boom 10 is mounted via a bracket 203. The second boom 11 is attached. On the other hand, on the lower surface of the second base, supporting wheels 304 that roll on the upper surface of the plate 303 are fixed at appropriate intervals to assist the rotation of the second base 6.

A hydraulic motor 306 with a speed reducer is fixedly provided on the lower surface of the plate 303. A pinion gear 310 attached to the drive shaft of the hydraulic motor 306 with a reduction gear
With the gear 309. With such a configuration,
By driving the hydraulic motor 306 with a reducer, both the gear 309 and the second base 6 can be rotated. Also, on the upper surface of the upper flange 313,
A chain wheel 19 is fixed at a position opposed to the vertical support 4 via a bracket.

Next, the structure of the gantry 9 provided on the furnace top and the chain winding mechanism 8 will be described. FIG. 15 is a side view of the gantry 9 and the chain winding mechanism 8 provided on the furnace top, and FIG. 16 is a top view of the same. The gantry 9 is installed on a gantry 20 around the furnace top. The gantry 9 is mainly composed of the frame 4
01, 402, and 403 are combined as shown in the figure. Frame 403 arranged under the gantry 9
The upper end of the vertical strut 4 reaches between them, and the upper end can be fixed by bolts 405.

The chain hoisting mechanism 8 is arranged on a gantry 9. The chain winding mechanism 8 mainly includes
It comprises a winch 409 and a chain 18 whose one end is wound around the winch 409. A plate 408 supported by a jack 408 is disposed on the gantry 9, and the other end of the chain 18 is connected to the plate 408.
It is fixed to. Here, the chain 18 is engaged with a chain wheel 19 provided on the pedestal 5, and the winch 40
The pedestal 5 rises when the chain 9 winds up the chain 18, and the pedestal 5 descends when the chain 18 is rewound. On the other hand, a hose reel 411 is provided above the plate 408. The hose of this hose reel 411 is connected to a hydraulic cylinder or a hydraulic motor of the dismantling device through an opening 413 of the plate 408, and transmits a hydraulic pressure from a hydraulic supply source (not shown) to these hydraulic mechanisms.

The dismantling device 2 configured as described above is remotely controlled by using the operating device 15 installed on the gantry 20 around the furnace top while looking into the furnace from the opening in the furnace top.

[0040]

As described above, the dismantling apparatus of the present invention can be assembled and disassembled without giving any vibration or impact to the furnace inner wall. Therefore, the inner wall of the furnace is not broken and dropped during the assembly of the dismantling apparatus. In addition, the dismantling device of the present invention remotely operates the furnace inner wall to dismantle the refractory inside the furnace and carries out the dismantling waste outside the furnace, so that the worker does not need to enter the furnace and is safe. Furthermore, since the dismantling device of the present invention uses hydraulic pressure as a power source, it has a large destructive force, and the dismantling operation can proceed quickly and can be completed in a short time.

[Brief description of the drawings]

FIG. 1 is a view showing a state where a furnace inner wall refractory is being dismantled by a dismantling apparatus according to one embodiment of the present invention.

FIG. 2 is a view showing a state where a base is arranged on a furnace bottom.

FIG. 3 is a view showing a state where a pedestal is assembled to a base placed on a furnace bottom.

FIG. 4 is a view showing a state where the remaining portion of the vertical support is attached to the base placed on the furnace bottom.

FIG. 5 is a drawing showing a state where a gantry and a chain winding mechanism are arranged on a furnace top.

FIG. 6 is a drawing showing a state where a belt conveyor is arranged near a manhole.

FIG. 7 is a view showing a state in which a furnace inner wall is being dismantled by a breaker.

FIG. 8 is a view showing a structure of a first boom.

FIG. 9 is a view showing a structure of a second boom.

FIG. 10 is a view showing a state in which demolition waste is placed on a belt conveyor by a craw bucket.

FIG. 11 is a side view showing a state where the pedestal is assembled to the vertical support.

FIG. 12 is a drawing of the state shown in FIG. 11 as viewed from above the vertical support 4;

13 is a drawing of a cross section near the lower side of the upper flange viewed from above in the state shown in FIG. 11;

FIG. 14 is a drawing of a cross section near the lower side of the plate viewed from above in the state shown in FIG. 11;

FIG. 15 is a side view of a gantry provided on the furnace top and a chain winding mechanism.

FIG. 16 is a top view of a gantry provided on a furnace top and a chain winding mechanism.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Dry coke making furnace 2 Dismantling device 3 First base 4 Vertical support 5 Base 6 Second base 8 Mechanism 9 Mount 10 First boom 11 Second boom 12 Sand, etc. 13 Belt conveyor 14 Furnace inner wall refractories 16 Jack 17 Jack 18 Chain DESCRIPTION OF SYMBOLS 19 Chain wheel 20 Furnace top mount 21 Demolition debris 22 Manhole 23 Lower vertical support 24 Frame 25 Opening hole 26 Guide rail 31 Breaker 33 Claw bucket 101 Stick boom 102 Main boom 103 Bracket 106 Hydraulic cylinder 107 Protective cover 109 Hydraulic cylinder 110 Protective cover 201 stick boom 202 main boom 203 bracket 206 hydraulic cylinder 207 protective cover 209 hydraulic cylinder 210 protective cover 301 lock cylinder 302 guide roller 03 Plate 304 Support wheel 306 Hydraulic motor with reduction gear 307 Bearing outer ring 308 Bearing inner ring 309 Gear 310 Pinion gear 311a Upper frame 311b Lower frame 312 Lower flange 313 Upper flange 314 Boss 401 Frame 403 Frame 405 Bolt 408 Jack 408 Plate 409 411 Hose reel 413 Open hole

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasushi Omori 9-27 Kawabuchi-cho, Yahata-Higashi-ku, Kitakyushu-shi, Fukuoka Taihei Kogyo Co., Ltd. Yawata Branch (72) Inventor Atsushi Ishimaru Kawabuchi, Yawata-Higashi-ku, Kitakyushu-shi, Fukuoka 9-27, Taihei Kogyo Co., Ltd. Yawata Branch (72) Inventor Sumio Sakaki 1-1, Hibata-cho, Tobata-ku, Kitakyushu-shi, Fukuoka Prefecture Nippon Steel Corporation Yawata Works (72) Inventor Kiyoto Kasai Fukuoka (72) Inventor Ichiro Sakurai 13-1 Konyacho, Kokurakita-ku, Kitakyushu-shi, Fukuoka Prefecture F-term (in reference) 4K051 AA08 AB03 LH03

Claims (5)

[Claims] 1. A first base on which jacks are arranged on an outer edge and a bottom surface, a vertical support provided on the first base, a pedestal disposed on the vertical support so as to be vertically movable, and an upper part of the vertical support. With a chain winding mechanism provided in the
The pedestal is provided with a second base rotatable around a vertical column, and the second base is provided with a first boom with a breaker at the tip and a second boom with a claw bucket at the tip. The two booms are arranged opposite to each other with the vertical support interposed, and the pedestal can be raised and lowered by hoisting and lowering the chain connected to the pedestal with the chain hoisting mechanism. A vertical furnace inner wall refractory dismantling device. 2. The vertical furnace inner wall refractory dismantling device according to claim 1, wherein the vertical strut is constituted by connecting a plurality of short struts. 3. The vertical furnace inner wall refractory dismantling apparatus according to claim 1, wherein a guide rail is provided on a side surface of the vertical support. 4. A method for dismantling a vertical furnace inner wall refractory using the vertical furnace inner wall refractory dismantling apparatus according to claim 1, 2 or 3. 5. The method for dismantling a vertical furnace inner wall refractory according to claim 4, wherein the dismantling is performed after the first base is buried with one or both of sand and gravel.