How to insert insulation material during hot repair of coke ovens

Abstract

To provide a method of inserting a heat insulator, capable of curbing damage to a furnace wall and a furnace bottom when hot-repairing a whole coke oven.SOLUTION: A method of inserting a heat insulator comprises a preparation step (#5), a temporary installation step (#10), a disposing step (#15), a connection step (#20), an installation step (#25), and an insertion step (#30). In the preparation step (#5), a carriage (10) including a temporary hanging rail (13) and a guide member (15) is prepared, and a heat insulator (18) and a hanging-down rail (14) are prepared. In the temporary installation step (#10), the hanging-down rail (14) is mounted on the carriage (10). The guide member (15) restricts a movement of the hanging-down rail (14) in a width direction. In the installation step (#25), a first wire (20) and plural second wires (21) are pulled, and the hanging-down rail (14) is fixed at the same height as the temporary hanging rail (13). In the insertion step (#30), the heat insulator (18) is carried over from the temporary hanging rail (13) to the hanging-down rail (14).SELECTED DRAWING: Figure 6A

Description

[Technical field]

[0001] The present disclosure relates to a method for inserting insulation material during hot repair of a coke oven. [Background technology]

[0002] A coke oven for producing coke for use in steelmaking has a structure in which carbonization chambers, which convert coal into coke, and combustion chambers, which supply heat to the carbonization chamber, are arranged alternately in parallel. The carbonization chamber and the combustion chamber are separated by a furnace wall made of bricks. Heat is supplied from the combustion chamber to the carbonization chamber by thermal conduction through this furnace wall. Coal at room temperature is fed into the carbonization chamber. The fed coal is carbonized in the carbonization chamber by the heat from the combustion chamber to become coke. The coke is pushed from one end of the carbonization chamber to the other by an extruder. The carbonization chamber and the combustion chamber each extend from the push side to the coke discharge side.

[0003] The oven walls are constantly heated by the adjacent combustion chamber and are kept at high temperatures exceeding 1000°C. Furthermore, the oven walls are repeatedly subjected to friction from the coke every time the carbonized coke is pushed out of the carbonization chamber by the pusher. Therefore, after many years of use of a coke oven, damage such as cracks and chipped corners occurs in the oven walls. When the oven walls are damaged, they are repaired by replacing the bricks of the damaged oven walls. Repairs are performed, for example, on one combustion chamber. In that case, the two oven walls that separate the combustion chamber are repaired.

[0004] When repairing the oven walls, workers enter the coke chamber to replace damaged bricks. If the temperature of all the combustion chambers in the coke oven is lowered in order for the workers to replace the bricks, the temperature change will cause a change in the volume of the bricks in the oven walls. The change in the volume of the bricks will cause cracks in the bricks. For this reason, the repair of the coke oven is carried out hot. In other words, during repair, the temperature of the combustion chambers other than the combustion chamber to be repaired is not lowered. On the other hand, in order to repair the oven walls, workers need to enter the coke chamber to replace the bricks. For this reason, it is necessary to cool the work space in the coke chamber to a level that allows workers to enter.

[0005] As a method for securing a space for repair work, it is conventionally known to insert a heat insulating material into the coking chamber adjacent to the combustion chamber to be repaired. This heat insulating material serves to block heat from the combustion chambers other than the combustion chamber to be repaired. Therefore, the temperature of the space between the heat insulating material and the combustion chamber to be repaired drops, making it possible for workers to enter.

[0006] For example, Patent Document 1 discloses a method of installing insulation material during hot repair of a coke oven. In Patent Document 1, a rail for suspending insulation material (hereinafter referred to as a hanging rail) is installed in advance on the ceiling of the carbonization chamber. In addition, a cart is placed in front of the coke oven to be repaired. The cart has a temporary hanging rail corresponding to the hanging rail. The insulation material is hung on the temporary hanging rail via rollers or the like. During repair, the hanging rail of the cart and the temporary hanging rail are connected. After the connection, the insulation material is transferred from the temporary hanging rail to the hanging rail. According to the insulation material installation method described in Patent Document 1, the insulation material can be inserted into the carbonization chamber. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent Application No. 1981-125481 Summary of the Invention [Problem to be solved by the invention]

[0008] Meanwhile, repairs of coke ovens are roughly divided into two types: end flue repairs and full repairs (through-wall repairs). In end flue repairs, only the ends of the coke oven walls are repaired. In full repairs, the entire coke oven walls are repaired at once. When full repairs of a coke oven are performed, heat insulating material having the same dimensions as the coke oven is installed in the longitudinal direction of the coke oven (extension direction of the carbonization chamber and the combustion chamber). The longitudinal dimension of the coke oven is about 16 m. In order to apply the method of inserting heat insulating material of Patent Document 1 to full repairs of a coke oven, it is necessary to install an extremely long hanging rail with a total length of about 16 m in the coke oven. In order to install such a rail, it is necessary to use equipment such as a tow truck. However, when a tow truck is used, the rail may collide with the oven wall due to lateral shaking, causing damage to the oven wall. In addition, during the transportation of the rail by the tow truck, the rail may not be able to maintain its horizontality with respect to the bottom of the oven. In this case, the rail drags on the hearth, causing damage to the hearth.

[0009] An object of the present disclosure is to provide a method for inserting insulation material that can suppress damage to the furnace wall and bottom when performing full repair of a coke oven in the hot state. [Means for solving the problem]

[0010] The method for inserting an insulating material during hot repair of a coke oven according to the present disclosure includes a preparation step, a temporary installation step, a placement step, a connection step, an installation step, and an insertion step. In the preparation step, a cart including a temporary suspension rail and a guide member is prepared, and an insulating material having the same dimensions as the longitudinal dimension of the coke oven and a hanging rail corresponding to the temporary suspension rail are prepared. In the temporary installation step, the insulating material is suspended from the temporary suspension rail, and the hanging rail is placed on the cart along the longitudinal direction. The guide member limits the movement of the hanging rail in the width direction. In the placement step, the cart is placed on the extruder side of the coke oven where the hot repair is performed. In the connection step, a first wire is connected to the hanging rail, and multiple second wires are connected to the hanging rail at intervals in the longitudinal direction. The first wire extends from the coke discharge side of the coke oven toward the hanging rail. The multiple second wires extend from the upper part of the coke oven toward the hanging rail. In the installation process, the first wire and the multiple second wires are pulled, and the suspension rail is raised into the coke oven and fixed at the same height as the temporary suspension rail. In the insertion process, the suspension rail and the temporary suspension rail are connected, and the insulation material is transferred from the temporary suspension rail to the suspension rail. Effect of the Invention

[0011] According to the insulation material insertion method of the present disclosure, damage to the furnace wall and hearth can be suppressed when performing full repair of a coke oven in the hot state. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a schematic diagram showing the overall configuration of a coke oven. [Diagram 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Diagram 3] FIG. 3 is a front view of a cart used in the heat insulating material insertion method according to the first embodiment. [Figure 4] FIG. 4 is a side view of the carriage shown in FIG. [Diagram 5] FIG. 5 is a flow diagram showing the method for inserting the heat insulating material according to this embodiment. [Figure 6A]FIG. 6A is a schematic diagram showing the state at the end of the placement process. [Figure 6B] FIG. 6B is a schematic diagram showing the connection process. [Figure 6C] FIG. 6C is a schematic diagram showing a state during the installation process. [Figure 6D] FIG. 6D is a schematic diagram showing the state at the end of the installation process. [Figure 6E] FIG. 6E is a schematic diagram showing a state during the insertion process. [Figure 6F] FIG. 6F is a schematic diagram showing the state at the end of the insertion step. [Figure 7] FIG. 7 is a side view of a suspension rail used in the heat insulating material insertion method according to the second embodiment. [Figure 8A] FIG. 8A is a schematic diagram showing the pulling process. [Figure 8B] FIG. 8B is a schematic diagram showing the pulling step. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The method for inserting an insulating material during hot repair of a coke oven according to an embodiment of the present disclosure includes a preparation step, a temporary installation step, a placement step, a connection step, an installation step, and an insertion step. In the preparation step, a cart including a temporary hanging rail and a guide member is prepared, and an insulating material having the same dimensions as the longitudinal dimension of the coke oven and a hanging rail corresponding to the temporary hanging rail are prepared. In the temporary installation step, the insulating material is hung on the temporary hanging rail, and the hanging rail is placed on the cart along the longitudinal direction. The guide member limits the movement of the hanging rail in the width direction. In the placement step, the cart is placed on the extruder side of the coke oven where the hot repair is performed. In the connection step, a first wire is connected to the hanging rail, and multiple second wires are connected to the hanging rail at intervals in the longitudinal direction. The first wire extends from the coke discharge side of the coke oven toward the hanging rail. The multiple second wires extend from the upper part of the coke oven toward the hanging rail. In the installation process, the first wire and the multiple second wires are pulled, and the suspension rail is raised into the coke oven and fixed at the same height as the temporary suspension rail. In the insertion process, the suspension rail and the temporary suspension rail are connected, and the insulating material is transferred from the temporary suspension rail to the suspension rail (first configuration).

[0014] In the insulation material insertion method according to the first configuration, in the placement step, a cart is placed on the pusher side of the coke oven. A suspension rail is placed on the cart. In the installation step, the first wire and the second wire are pulled, and the suspension rail is pulled up while being pulled into the coke oven. At that time, the guide member limits the movement of the suspension rail in the width direction. Therefore, it is possible to prevent the suspension rail from colliding with the oven wall and damaging the oven wall.

[0015] In addition, in the connecting step, each of the multiple second wires is connected to the suspension rail at intervals in the longitudinal direction. When the suspension rail is pulled up, the suspension rail is supported by the multiple second wires. In this case, the horizontality of the suspension rail can be maintained compared to when the suspension rail is supported by a single wire. Therefore, damage to the hearth caused by the suspension rail dragging the hearth can be suppressed.

[0016] In the temporary installation step of the heat insulating material inserting method of the first configuration, a jig having a rounded bottom surface on the end side of the suspension rail may be attached below one end of the suspension rail (second configuration).

[0017] In the second configuration of the insulation insertion method, a jig is attached below at least one end of the suspension rail. If the suspension rail is tilted during the installation process, the jig comes into contact with the hearth. At this time, the lower surface of the jig on the end side of the suspension rail is rounded. Therefore, compared to when the jig is angular, the hearth is not damaged. Therefore, according to the second configuration, damage to the hearth can be further suppressed.

[0018] In the insulation inserting method of the first or second configuration, the installation step may include a drawing step and a lifting step. In the drawing step, the suspension rail is drawn into the coke oven by pulling the first wires while being supported by the second wires so that the suspension rail is horizontal to the hearth. In the lifting step, the suspension rail is lifted by pulling the second wires (third configuration).

[0019] The installation process of the insulation material insertion method of the third configuration includes a drawing process and a lifting process. In the drawing process, the suspension rail is drawn into the coke oven along the longitudinal direction of the coke oven by pulling the first wire. At that time, the suspension rail is supported horizontally by the multiple second wires. Therefore, when the suspension rail is moved in the longitudinal direction, the horizontality of the suspension rail with respect to the hearth can be maintained. Therefore, according to the third configuration, damage to the hearth can be further suppressed.

[0020] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In each drawing, the same or corresponding components are denoted by the same reference characters, and the same description will not be repeated.

[0021] [First embodiment] [Coke oven] The overall configuration of a coke oven will be described with reference to Figures 1 and 2. Figure 1 is a schematic diagram showing the overall configuration of a coke oven. Figure 2 is a cross-sectional view taken along line II-II in Figure 1. The coke oven has a structure in which a carbonization chamber 80 and a combustion chamber 90 are alternately arranged in parallel. Room temperature coal is fed into the carbonization chamber 80. The combustion chamber 90 supplies heat to the carbonization chamber 80. The heat supplied from the combustion chamber 90 causes the coal in the carbonization chamber 80 to be carbonized into coke. The coke is pushed out by the pusher 60 and discharged from the carbonization chamber 80. The discharged coke is guided to the fire truck 70 by a guide vehicle (not shown). The coke is then transported to the next process by the fire truck 70.

[0022] In the coke oven, rails 61 are laid on the pusher 60 side, and rails 71 are laid on the coke discharge side. The pusher 60 can move on the rails 61. In addition, the fire extinguishing vehicle 70 can move on the rails 71.

[0023] The coke chamber 80 and the combustion chamber 90 are composed of a ceiling 92 and a hearth 93. The adjacent coke chambers 80 and the combustion chambers 90 are separated by a furnace wall 91. These furnace walls 91 connect the ceiling 92 and the hearth 93, respectively. A coal loading port 81 for loading coal is provided above each of the coke chambers 80. The coal loading port 81 penetrates the ceiling 92.

[0024] The carbonization chamber 80 and the combustion chamber 90 extend between the pusher 60 and the fire extinguishing truck 70. In this specification, the extension direction of the carbonization chamber 80 and the combustion chamber 90 is referred to as the longitudinal direction of the coke oven (hereinafter simply referred to as the longitudinal direction). The direction in which the carbonization chambers 80 and the combustion chambers 90 are alternately arranged in parallel is referred to as the width direction of the coke oven (hereinafter simply referred to as the width direction). The height direction of the coke oven is referred to as the up-down direction.

[0025] [Trolley] Fig. 3 is a front view of the bogie 10 used in the insulation material insertion method according to this embodiment. In the insulation material insertion method described below, the bogie 10 is arranged alongside the combustion chamber 90 to be repaired along the longitudinal direction of the coke oven. Fig. 3 is a view of the bogie 10 as viewed along the longitudinal direction when the bogie 10 is arranged alongside the combustion chamber 90. Fig. 4 is a side view of the bogie 10 shown in Fig. 3.

[0026] 3 and 4, the cart 10 includes a flat body 11 and legs 12 provided at the four corners of the body 11. Wheels (not shown) are provided below each of the four legs 12. The cart 10 can move on a rail 61 laid on the extruder 60 side via the wheels.

[0027] The cart 10 further includes a temporary hanging rail 13 and a pair of widthwise guide members 15. The temporary hanging rail 13 extends in the longitudinal direction and hangs the heat insulating material 18.

[0028] A suspension rail 14 is placed on the cart 10. The suspension rail 14 placed on the cart 10 extends in the longitudinal direction. The suspension rail 14 corresponds to the temporary suspension rail 13. In other words, the suspension rail 14 has substantially the same shape as the temporary suspension rail 13. The temporary suspension rail 13 and the suspension rail 14 only need to have a length that allows the insulation material 18 to be suspended. In the longitudinal direction, the dimensions of the temporary suspension rail 13 and the suspension rail 14 may be the same as the dimensions of the coke oven (the carbonization chamber 80 and the combustion chamber 90), for example, 16 m.

[0029] The heat insulating material 18 is in the form of a panel, and is arranged in the coke chambers 80 adjacent to the combustion chamber 90 when the furnace wall 91 of the combustion chamber 90 is repaired. At that time, the heat insulating material 18 plays a role of blocking heat from a combustion chamber other than the combustion chamber 90 to be repaired. The heat insulating material 18 has the same dimensions as the coke oven in the longitudinal direction. The longitudinal dimension of the coke oven is the longitudinal dimension of the coke chamber 80 and the combustion chamber 90, and is, for example, 16 m. The vertical dimension of the heat insulating material 18 is typically approximately the same as that of the coke chamber 80 and the combustion chamber 90, and is, for example, 5.0 to 6.5 m. The material of the heat insulating material 18 may be, for example, glass wool.

[0030] The shapes of the temporary suspension rail 13 and the suspension rail 14 are not particularly limited, but are, for example, H-shaped steel. The temporary suspension rail 13 includes an upper flange portion 131 and a lower flange portion 132. Similarly, the suspension rail 14 includes an upper flange portion 141 and a lower flange portion 142. The suspension rail 14 is wrapped with a heat insulating material (not shown).

[0031] The heat insulating material 18 is suspended from the temporary hanging rail 13 so as to be movable in the longitudinal direction. For example, the heat insulating material 18 is suspended from the temporary hanging rail 13 via a hanging jig 17. There is a pair of hanging jigs 17 in the width direction, and each is fixed to both ends of the heat insulating material 18 in the width direction. The hanging jig 17 has a pair of rollers 171 in the vertical direction. The hanging jig 17 clamps the lower flange portion 132 of the temporary hanging rail 13 between the pair of rollers 171. A plurality of such pairs of hanging jigs 17 are provided at intervals in the longitudinal direction.

[0032] The temporary hanging rail 13 is supported by a plurality of frames 16. Each frame 16 is composed of two pillars 161 and a beam 162. The pillars 161 extend in the vertical direction, and the lower ends are fixed to the main body 11. The beams 162 extend in the width direction, and are joined to the two pillars 161. In this embodiment, the temporary hanging rail 13 is disposed below the beams 162, and is fixed to the center of the beams 162 in the width direction. The means for fixing the temporary hanging rail 13 and the beams 162 is not particularly limited. The fixing means is, for example, fixing by bolts or fixing by welding.

[0033] The pair of guide members 15 are disposed on the main body 11. The hanging rail 14 is disposed between the pair of guide members 15. The guide members 15 limit the movement of the hanging rail 14 in the width direction.

[0034] Guide member 15 has a plate portion 151 and rollers 152 provided on the inside of plate portion 151. Upper flange portion 141 of suspension rail 14 is supported from below by rollers 152. Suspension rail 14 can move on rollers 152 along the longitudinal direction.

[0035] In this embodiment, the pair of guide members 15 are arranged side by side in the longitudinal direction. The position at which the guide members 15 are provided is not particularly limited. The guide members 15 are preferably provided in a position as close as possible to the combustion chamber 90 that is the target of repair.

[0036] [How to insert insulation] FIG. 5 is a flow diagram showing the insulating material insertion method according to this embodiment. As shown in FIG. 5, the insulating material insertion method according to this embodiment includes a preparation step (#5), a temporary installation step (#10), an arrangement step (#15), a connection step (#20), an installation step (#25), and an insertion step (#30). This insulating material insertion method is used to repair two oven walls 91 that divide a combustion chamber 90 in a coke oven. During the repair, insulating materials 18 are inserted into two coking chambers 80 adjacent to the combustion chamber 90. Below, a method of inserting insulating material 18 into one coking chamber 80 will be described, but insulating material 18 can also be inserted into the other coking chamber 80 in a similar manner.

[0037] Hereinafter, the heat insulating material inserting method according to this embodiment will be described with reference to Figures 6A to 6F. For ease of explanation, some components of the cart 10 are not shown in Figures 6A to 6F.

[0038] In the preparation step (#5), a dolly 10 is prepared, which includes a temporary suspension rail 13 and a guide member 15. Furthermore, in the preparation step (#5), a heat insulating material 18 and a suspension rail 14 are prepared.

[0039] In the temporary installation process (#10), the insulating material 18 is suspended from the temporary suspension rail 13. The insulating material 18 is movable in the longitudinal direction relative to the temporary suspension rail 13. Furthermore, in the temporary installation process (#10), the suspension rail 14 is placed on the cart 10 along the longitudinal direction. At this time, the suspension rail 14 is disposed between a pair of guide members 15, and the guide members 15 restrict movement in the width direction.

[0040] In the placement step (#15), the cart is placed on the pusher 60 side of the coke oven where hot repair is performed. FIG. 6A is a schematic diagram showing the state at the end of the placement step (#15). Referring to FIG. 6A, the above-mentioned cart 10 is placed on the pusher 60 side of the combustion chamber 90. On both sides of the width of the combustion chamber 90, there are carbonization chambers 80 (not shown). The cart 10 is placed so that the carbonization chambers 80 into which the insulating material 18 is inserted are located on an extension of the suspension rails 14 in the longitudinal direction.

[0041] In the connecting step (#20), the first wire 20 is connected to the suspension rail 14 on the cart 10. Also in the connecting step (#20), the second wires 21 are connected to the suspension rail 14 at intervals in the longitudinal direction. Figure 6B is a schematic diagram showing the connecting step (#20).

[0042] 6B, the first wire 20 extends from the coke discharge side of the coke oven toward the suspension rail 14. For example, a winch (not shown) is disposed on the coke discharge side of the coke chamber 80 into which the insulating material 18 is inserted. The first wire 20 is connected to the winch, passes through the coke chamber 80, and extends from the winch toward the suspension rail 14. The first wire 20 is typically connected to the tip of the suspension rail 14.

[0043] The multiple second wires 21 each extend from the upper part of the coke oven toward the hanging rail 14. For example, multiple winches (not shown) are arranged on the ceiling part 92 of the carbonization chamber 80 into which the hanging rail 14 is inserted. The multiple second wires 21 are each connected to the corresponding winches, and extend from the winches toward the hanging rail 14 through the coal loading port 81 of the carbonization chamber 80, for example. The multiple second wires 21 are typically connected to the upper flange part 141 of the hanging rail 14. Although not particularly limited, the multiple second wires 21 may be connected to the hanging rail 14 at equal intervals.

[0044] There is no particular limitation on the means for connecting the first wire 20 and the multiple second wires 21 to the suspension rail 14. For example, a ring-shaped attachment part may be provided at the tip of the suspension rail 14, and the first wire 20 may be passed through the attachment part for connection. Also, multiple attachment parts may be provided on the upper surface of the suspension rail 14, and the multiple second wires 21 may be passed through each attachment part for connection.

[0045] In the installation step (#25), the first wire 20 and the multiple second wires 21 are each pulled, and the hanging rail 14 is pulled up into the carbonization chamber 80 of the coke oven and fixed at the same height as the temporary hanging rail 13. FIG. 6C is a schematic diagram showing the state during the installation step (#25). In the installation step (#25), the first wire 20 and the multiple second wires 21 are each pulled, and the hanging rail 14 is pulled up while being drawn into the carbonization chamber 80. At that time, the movement of the hanging rail 14 in the width direction is restricted by the multiple guide members 15. Therefore, the hanging rail 14 is inserted into the carbonization chamber 80 along the longitudinal direction.

[0046] FIG. 6D is a schematic diagram showing the state at the end of the installation step (#25). In the installation step (#25), the suspension rail 14 is raised to the same height as the temporary suspension rail 13. Then, the suspension rail 14 is fixed in position at the same height as the temporary suspension rail 13. The position of the suspension rail 14 may be fixed by using the ring-shaped attachment portion used when connecting the multiple second wires 21 and the suspension rail 14. In this case, for example, a metal fitting having hook-shaped (hook-shaped) ends is used to fix the position of the suspension rail 14. One end of the metal fitting is hooked onto the ring-shaped attachment portion of the suspension rail 14. The other end of the metal fitting is welded to a member constituting the frame of the ceiling portion 92 through the coal loading port 81. When the fixing of the suspension rail 14 is completed, the first wire 20 and the multiple second wires 21 are removed from the suspension rail 14.

[0047] In the insertion step (#30), the suspension rail 14 and the temporary suspension rail 13 are connected, and the insulating material 18 is transferred from the temporary suspension rail 13 to the suspension rail 14. Fig. 6E is a schematic diagram showing the state midway through the insertion step (#30). In the insertion step (#30), the cart 10 is moved in the width direction, and the temporary suspension rail 13 is arranged in series with the suspension rail 14. In other words, the temporary suspension rail 13 is arranged on an extension of the suspension rail 14 in the longitudinal direction.

[0048] Next, the temporary suspension rail 13 and the suspension rail 14 are connected. There is no particular limitation on the means for connecting the temporary suspension rail 13 and the suspension rail 14. For example, the temporary suspension rail 13 and the suspension rail 14 may be connected directly or via a connecting member 22.

[0049] The connecting member 22 is plate-shaped, and is fixed to the lower flange portion 132 of the temporary hanging rail 13 and the lower flange portion 142 of the hanging rail 14. The connecting member 22 has the same thickness as the lower flange portion 132 of the temporary hanging rail 13 and the lower flange portion 142 of the hanging rail 14. The fixing means between the temporary hanging rail 13 and the connecting member 22, and the fixing means between the hanging rail 14 and the connecting member 22 are not particularly limited. For example, fixing by bolts or fixing by welding may be used.

[0050] 6F is a schematic diagram showing the state at the end of the insertion step (#30). After the temporary hanging rail 13 and the hanging rail 14 are connected, the insulating material 18 is moved to the combustion chamber 90 side. The means for moving the insulating material 18 may be, for example, a winch installed on the opposite side of the combustion chamber 90 from the extruder side. In this case, a wire extending from the winch is connected to the insulating material 18, and the insulating material 18 is moved by pulling the wire. In this way, the insulating material 18 is transferred from the temporary hanging rail 13 to the hanging rail 14.

[0051] In this manner, the heat insulating material 18 can be inserted outside the furnace wall 91 of the combustion chamber 90, i.e., into the carbonization chamber adjacent to the combustion chamber 90. By carrying out the same work on the other furnace wall 91 of the combustion chamber 90, the entire surface of the furnace wall 91 of the combustion chamber 90 can be repaired.

[0052] After the repair work of the oven wall 91 is completed, the insulation material 18 and the suspension rail 14 are removed from inside the coke oven. The insulation material 18 and the suspension rail 14 can be removed by performing the insulation material insertion method described above in reverse order. For example, a winch is placed on the cart 10, and the insulation material 18 is transferred from the suspension rail 14 to the temporary suspension rail 13 by pulling the insulation material 18. In addition, the suspension rail 14 is lowered to the bottom of the oven using multiple second wires 21, and is retrieved by pulling it with a winch placed on the cart 10.

[0053] The cart 10 used in the heat insulating material insertion method according to this embodiment can move on the rail 61 on the side of the pusher 60. Therefore, when the pusher 60 is used in the operation of the coke oven, the cart 10 can be easily retracted.

[0054] [effect] In the insulation material insertion method according to the present embodiment, in the placement step (#15), a carriage 10 is placed on the pusher side of a coke oven. A hanging rail 14 is placed on the carriage 10. In the installation step (#25), the first wire 20 and the second wire 21 are pulled, and the hanging rail 14 is pulled up while being drawn into the carbonization chamber 80 adjacent to the combustion chamber 90 to be repaired. At that time, the movement of the hanging rail 14 in the width direction is restricted by a guide member 15 provided on the carriage 10. Therefore, it is possible to suppress damage to the furnace wall 91 of the combustion chamber 90 due to the hanging rail 14 colliding with the furnace wall 91.

[0055] Furthermore, in the connection step (#20), each of the multiple second wires 21 is connected to the suspension rail 14 at intervals in the longitudinal direction. When the suspension rail 14 is pulled up in the installation step (#25), the suspension rail 14 is supported by the multiple second wires 21. In this case, the horizontality of the suspension rail 14 can be maintained more accurately than when it is supported by a single wire. Therefore, damage to the hearth 93 caused by the suspension rail 14 dragging the hearth 93 can be suppressed.

[0056] [Second embodiment] In the insulation material insertion method according to the second embodiment, in the temporary installation step (#10), jig 23 is attached below one end of suspension rail 14. In the example of this embodiment, jig 23 is attached to the leading end side (combustion chamber 90 side) of suspension rail 14 arranged on cart 10. However, jig 23 may be attached to the rear end side of suspension rail 14, or may be attached to both the leading end side and the rear end side.

[0057] Fig. 7 is a side view of a suspension rail 14 used in a heat insulating material insertion method according to the second embodiment. Fig. 7 shows the tip side of the suspension rail 14 to which a jig 23 is attached. The bottom surface of the jig 23 on the end side of the suspension rail 14 is rounded. In the example of this embodiment, the bottom surface of the jig 23 is rounded on the tip side of the suspension rail 14.

[0058] 7, the jig 23 includes an upper flange portion 231, a lower flange portion 232, and a main body portion 233. The upper flange portion 231 and the lower flange portion 232 are each connected to the main body portion 233.

[0059] The upper flange portion 231 is fixed to the lower flange portion 142 of the suspension rail 14. There is no particular limitation on the means for fixing the upper flange portion 231 and the lower flange portion 142. For example, they may be fixed by bolts.

[0060] The lower flange portion 232 is plate-like and curves upward at the tip end side of the suspension rail 14. In other words, the lower flange portion 232 has a warped shape. The lower flange portion 232 has a lower surface 232a.

[0061] In the installation step (#25), if the suspension rail 14 is tilted, the lower flange portion 232 of the jig 23 comes into contact with the hearth 93. At this time, the lower surface 232a of the lower flange portion 232 that comes into contact with the hearth 93 is rounded. Therefore, compared to when the jig 23 is angular, the hearth 93 is not damaged. Therefore, damage to the hearth 93 can be further suppressed.

[0062] [Third embodiment] Hereinafter, the insulation material insertion method according to the third embodiment will be described with reference to Figures 8A and 8B. In the insulation material insertion method according to the third embodiment, the installation process (#25) includes a pulling-in process and a lifting process. Figure 8A is a schematic diagram showing the pulling-in process. Figure 8B is a schematic diagram showing the lifting process.

[0063] 8A, in the pulling process, the first wire 20 is pulled to pull the suspension rail 14 into the carbonization chamber 80. In other words, in the pulling process, the suspension rail 14 is moved only in the longitudinal direction, and is not moved in the vertical direction. However, in the pulling process, the suspension rail 14 is supported by a plurality of second wires 21 so as to be horizontal to the furnace bottom 93.

[0064] Referring to Fig. 8B, in the lifting process, suspension rail 14 is lifted by pulling multiple second wires 21. Fig. 8B shows a state in the middle of lifting suspension rail 14. In the lifting process, suspension rail 14 is moved only in the up and down direction, and is not moved in the longitudinal direction.

[0065] During the pulling process, the suspension rail 14 is supported horizontally by the multiple second wires 21. Therefore, when the suspension rail 14 is moved in the longitudinal direction, the horizontality of the suspension rail 14 with respect to the hearth 93 can be maintained. Therefore, damage to the hearth 93 can be further suppressed.

[0066] The embodiments of the present disclosure have been described above. However, the above-described embodiments are merely examples for implementing the present disclosure. Therefore, the present disclosure is not limited to the above-described embodiments, and can be implemented by appropriately modifying the above-described embodiments without departing from the spirit of the present disclosure.

[0067] In the insulation material insertion method according to each of the above embodiments, the temporary installation process (#10) is followed by the placement process (#15). However, the order of these processes may be reversed. In other words, the temporary installation process (#10) may be performed after the placement process (#15). In this case, first, the cart 10 is placed on the pusher 60 side of the coke oven where hot repair is to be performed. After that, the insulation material 18 is suspended from the temporary suspension rail 13, and the suspension rail 14 is placed on the cart 10. [Explanation of symbols]

[0068] 10: Cart 13: Temporary hanging rail 14: Hanging rail 15: Guide member 18: Insulation 20: First wire 21: Second wire 23: Jig 232a: Bottom surface 60: Extruder

Claims

1. A method for inserting insulation material during hot repair of a coke oven, comprising the steps of: A preparation process of preparing a carriage including a temporary suspension rail and a guide member, and also preparing an insulating material having the same dimensions as the longitudinal dimension of the coke oven and a suspension rail corresponding to the temporary suspension rail; a temporary installation step of suspending the heat insulating material from the temporary suspension rail and placing the suspension rail on the carriage along the longitudinal direction, the guide member restricting movement of the suspension rail in the width direction; A placement step of placing the cart on the pusher side of the coke oven where hot repair is performed; a connecting step of connecting a first wire extending from a coke discharge side of the coke oven toward the suspension rail to the suspension rail, and connecting a plurality of second wires extending from an upper portion of the coke oven toward the suspension rail to the suspension rail at intervals in the longitudinal direction; an installation process of pulling the first wire and the plurality of second wires, respectively, to pull the suspension rail into the coke oven and fix it at the same height as the temporary suspension rail; an insertion process of connecting the suspension rail and the temporary suspension rail and transferring the insulating material from the temporary suspension rail to the suspension rail; An insulation insertion method comprising:

2. The method for inserting insulation material according to claim 1, In the temporary installation step, a jig having a rounded bottom surface on the end side of the suspension rail is attached below one end of the suspension rail.

3. The method for inserting heat insulating material according to claim 1 or 2, The installation step includes a pulling step of pulling the suspension rail into the coke oven by pulling the first wire while supporting the suspension rail with the second wires so that the suspension rail is horizontal to the hearth; and a lifting step of lifting the suspension rail by pulling the second plurality of wires.

Images