JP5919796B2 - Coke oven repair method and repair parts - Google Patents

Description

  The present invention relates to a method for repairing a coke oven and a member for repair.

  In the coke oven, coal is sequentially charged into a plurality of adjacent carbonization chambers, each of the carbonization chambers is subjected to dry distillation at a high temperature of around 1100 ° C., and coke generated by the dry distillation is extruded from each carbonization chamber by an extruder. Coke is produced. Usually, the coke oven continues to operate while being heated for 30 to 50 years after starting operation. When the coke oven is operated for a long period of time, the bricks constituting the carbonization chamber (hereinafter abbreviated as carbonization chamber bricks) may be damaged due to factors such as temperature change and friction with the coke, and may need repair.

  As a method for repairing the carbonization chamber brick, there are a method of spraying repairing the surface of the carbonization chamber brick, a method of reloading the carbonization chamber brick, and the like. Among them, a method of spraying and repairing a carbonization chamber brick by opening a furnace lid installed at the horizontal end of the carbonization chamber and inserting a lance from the kiln opening is widely used as a daily repair method. When repairing a carbonization chamber brick using this method, the carbonization chamber that is not repaired continues heating and operation as usual. Further, in order to increase the repair effect and suppress the damage of the carbonization chamber brick, it is preferable to perform the repair while maintaining the high temperature state in the carbonization chamber where the repair is performed, and suppress the temperature decrease as much as possible. .

  For this reason, when a lance is inserted from the kiln and the carbonization chamber brick is repaired by spraying, only the furnace lid on one end side of the carbonization chamber is opened to prevent air from flowing through the carbonization chamber. The carbonization room brick is repaired. Moreover, when performing large-scale repairs, such as transposition repair of a carbonization chamber brick, between the site | part which repairs, and the site | part which maintains temperature are insulated. Patent Document 1 discloses a heat insulating structure that is inserted from a coal charging port of a carbonization chamber and insulates between a portion for repair and a portion for maintaining temperature.

JP-A-7-126634

  However, when only the furnace lid on one end side of the carbonization chamber is opened, the place where the carbonization chamber brick can be repaired is limited to the kiln opening on the one end side. In addition, when heat insulation work is performed in order to maintain the carbonization chamber to be repaired at a high temperature, it takes time for pre-preparation such as the installation of heat insulating material and post-cleaning, so the work of repairing the carbonization chamber is efficient. I can't do it. When aging of the furnace progresses and it is necessary to repair many carbonization chambers in a limited time, increasing the efficiency of repair work is an important issue.

  Specifically, it is known that the carbonization chamber bricks are damaged at the kilns where the temperature changes greatly when the coke is taken out of the coke. Repair is necessary. However, in the conventional repair method, the kilns at both ends of the carbonizing chamber cannot be repaired at the same time, and only one kiln port on one side can be constructed for one carbonizing chamber. This means that if the kilns at both ends are opened at the same time, air flows through the carbonization chamber, the temperature of the carbonization chamber decreases greatly, and the operator can receive hot air on the side from which the air blows out. This is because the risk of work increases.

  In addition, the heat insulating structure described in Patent Document 1 has a mandrel made of an iron pipe at the center of the heat insulating material, and since the heat insulating material expands in the carbonization chamber and is in close contact with the furnace wall, carbonization is performed. Difficulty is expected when taking it out of the room. Such a heat insulating structure may be effective for large-scale repair work involving furnace wall dismantling, but work is not necessary for small-scale repair work such as routine spraying repair of kilns. Even if the repair efficiency is increased by simultaneous repair on both sides of the carbonization chamber, the effect of improving the efficiency is lost if it takes time to remove the heat insulation structure.

  The present invention has been made in view of the above problems, and an object thereof is to provide a coke oven repair method and a repair member capable of efficiently repairing a carbonization chamber without requiring a lot of work. is there.

  In order to solve the above-described problems and achieve the object, a repair method for a coke oven according to the present invention includes a repair member having a height substantially the same as the height of the carbonization chamber from the coal inlet of the carbonization chamber to the carbonization chamber. A column insertion step for preventing air from flowing between the kilns at both ends of the carbonization chamber by inserting, and kiln ports at both ends by removing the furnace lids at both ends of the carbonization chamber after the column insertion step And a repairing step of repairing the furnace wall in the carbonizing chamber from the kilns at both ends of the carbonizing chamber.

  The coke oven repair method according to the present invention is the above-described invention, wherein after the repair step is completed, the repair member is pushed out in the direction of the furnace port of the carbonization chamber by using an extruder. A step of discharging the repair member from the kiln.

  In order to solve the above problems and achieve the object, a coke oven repair member according to the present invention includes a frame having a height substantially equal to the height of the carbonization chamber, and a plurality of heat insulations accommodated in the frame. And a block.

  The member for repairing a coke oven according to the present invention is characterized in that, in the above invention, the heat insulating block is formed by binding a folded heat insulating material with a thermoplastic resin band.

  According to the coke oven repair method and the repair member according to the present invention, the carbonization chamber can be repaired efficiently without requiring many operations.

FIG. 1 is a perspective view showing a configuration of a coke oven to which the present invention is applied. FIG. 2 is a perspective view for explaining the configuration of the horizontal end of the carbonization chamber. FIG. 3 is a cross-sectional view in the longitudinal direction of the coking chamber for explaining the flow of the coke oven repair method according to one embodiment of the present invention. FIG. 4 is a side view showing a configuration of a support column according to an embodiment of the present invention. 5 is a cross-sectional view of the column shown in FIG. 4 in a direction parallel and perpendicular to the furnace wall.

  A coke oven repair method and repair member according to an embodiment of the present invention will be described below with reference to the drawings.

[Composition of coke oven]
First, a configuration of a coke oven to which the present invention is applied will be described with reference to FIGS. However, the configuration of the coke oven to which the present invention is applied is not limited to the configuration shown in FIGS.

  FIG. 1 is a perspective view showing a configuration of a coke oven to which the present invention is applied. As shown in FIG. 1, the coke oven to which the present invention is applied includes a plurality of carbonization chambers 11 and combustion chambers 12. The plurality of carbonization chambers 11 and the combustion chambers 12 are alternately formed in the upper part of the heat storage chamber 13 along the horizontal direction, and a plurality of coal charging ports 14 are formed in the ceiling portion of each carbonization chamber 11. In this embodiment, the carbonization chamber 11 has a substantially rectangular parallelepiped shape with a width of 0.4 to 0.6 m, a length of 10 to 20 m, and a height of 4 to 8 m.

  The plurality of coal loading ports 14 are for charging coal carried by the coal loading vehicle 15 traveling on the upper part of the coke oven into the carbonization chamber 11. Coal charged into the carbonization chamber 11 from the coal charging port 14 is subjected to dry distillation by receiving heat from the combustion chamber 12 adjacent to the carbonization chamber 11, and becomes red hot coke and is extruded from the carbonization chamber 11 by the extruder 16. . The red hot coke pushed out from the carbonization chamber 11 is transferred to the fire extinguisher 18 through the guide wheel 17 and conveyed by the fire extinguisher 18 to a red hot coke fire extinguishing equipment (not shown).

  FIG. 2 is a perspective view for explaining the configuration of the horizontal end of the carbonization chamber 11. As shown in FIG. 2, a furnace lid 21 is attached to the horizontal end of the carbonization chamber 11 so as to cover the kiln 11a. The furnace lid 21 includes a brick portion made of a refractory disposed on the side of the carbonization chamber 11 that is at a high temperature, and a lid portion that supports the brick portion. The lid portion is a portion that seals gas with the door frame 22, and a flange 23 is rotatably provided on the upper and lower portions thereof. At the kiln opening 11 a of the carbonization chamber 11, rod holders 24 for receiving the rod 23 are fixed to the left and right of the upper and lower portions of the door frame 22 for each carbonization chamber 11. When repairing the inside of the carbonization chamber 11, the furnace lid 21 is removed from the kiln opening 11a by a lid removing mechanism installed in an extruder or a guide car.

[Coke oven repair method]
Next, with reference to FIG. 3 thru | or FIG. 5, the repair method of the coke oven which is one Embodiment of this invention is demonstrated. FIG. 3 is a cross-sectional view in the longitudinal direction of the coking chamber for explaining the flow of the coke oven repair method according to one embodiment of the present invention. FIG. 4 is a side view showing a configuration of a support column according to an embodiment of the present invention. 5A and 5B are cross-sectional views of the column shown in FIG. 4 in directions parallel and perpendicular to the furnace wall, respectively.

  In the coke oven repair method according to an embodiment of the present invention, first, as shown in FIG. 3A, the bottom of the column 100 is parallel to the bottom of the carbonization chamber 11, and a crane is used. Then, the support column 100 is inserted into the carbonization chamber 11 from the coal charging port 14. As shown in FIG. 4, the support column 100 includes a rectangular parallelepiped frame 101 formed of an iron pipe or the like. The height L of the frame 101 is designed to be substantially the same as the height of the carbonization chamber 11 or slightly lower than the height of the carbonization chamber 11. The width D of the frame body 101 is smaller than the opening diameter of the coal loading port 14 and the width of the carbonizing chamber 11, and is designed to be 0.4 m, for example. When the support column 100 is inserted into the carbonization chamber, it is inserted so that the direction of the width D of the frame 101 is substantially parallel to the furnace wall of the carbonization chamber. A locking member 102 is attached to the upper portion of the frame body 101 so that the frame body 101 can be lifted by a crane. Reinforcing members 103 for maintaining the shape are provided at several positions in the height direction of the frame body 101.

  As shown in FIGS. 5A and 5B, a plurality of heat insulating blocks 104 are inserted in the frame body 101. The heat insulating block 104 is a thermoplastic material that is folded so that a long heat insulating material having a thickness of about 20 to 50 mm and a width of about 300 to 400 mm is overlapped in the thickness direction so that the thickness is slightly smaller than the opening diameter of the coal charging port 14. A rectangular parallelepiped shape is formed by binding with a resin band. In addition, when binding a heat insulating material, it binds in the state which compressed the heat insulating material in the thickness direction. Further, the heat insulating block 104 is put in the frame body 101 so that the thickness direction of the heat insulating material is in the width direction of the carbonization chamber 11, and in this state, the frame body 101 and the heat insulating block 104 are used using a thermoplastic resin band. May be further bound from the outside. The support column 100 functions as a repair member according to the present invention.

  Next, as shown in FIG. 3 (b), the upper end of the column 100 is moved to the ceiling of the carbonization chamber 11 by shifting the position of the column 100 in the length direction of the carbonization chamber 11 from directly below the coal inlet 14. After making it approach, the furnace lid 21 of the both ends of the carbonization chamber 11 is removed, and the both ends of the carbonization chamber 11 are opened. At this stage, the resin band that binds the heat insulating block 104 is melted by the heat in the carbonizing chamber 11, and the heat insulating block 104 contacts the furnace wall. For this reason, the furnace side 11a on the extruder side (Machine Side: MS) and the coke discharge side (Coke) side (CS) of the carbonization chamber 11 are blocked by the support column 100, and the MS side of the MS 11a and CS are closed. Air does not circulate between the kiln opening 11a. The inventor of the present invention has confirmed that air circulation can be prevented if the distance between the ceiling portion of the carbonization chamber 11 and the upper end portion of the support column 100 is 50 mm or less.

  Finally, as shown in FIG. 3C, the furnace wall is repaired by inserting the lance 110 from the MS and CS furnace ports 11 a of the carbonization chamber 11 and spraying a sprayed material on the furnace wall. The range from the kiln opening 11a to the position where the support column 100 is inserted is a repairable range. And after repair of a furnace wall is completed, the support | pillar 100 is discharged | emitted outside the carbonization chamber 11 using the extruder 16. FIG. The repair of the furnace wall is not limited to thermal spraying, and may be spraying, blasting, transshipment of bricks, or the like. Further, the frame body 101 constituting the support column 100 may be deformed after being inserted into the carbonization chamber 11. By making the structure easy to discharge in this way, the operation of discharging the column 100 to the outside of the carbonization chamber 11 can be facilitated.

  As is apparent from the above description, in the coke oven repair method according to an embodiment of the present invention, the carbonization chamber 11 has a height approximately equal to the height of the carbonization chamber 11 from the coal charging port 14 of the carbonization chamber 11. After blocking the air flow between the kiln ports 11a at both ends of the carbonization chamber 11 by inserting the support columns 100, the kiln ports 11a at both ends are opened by removing the furnace lids 21 at both ends of the carbonizing chamber 11. And the furnace wall in the carbonization chamber 11 is repaired from the kiln opening 11a of the both ends of the carbonization chamber 11. According to such a repair method, since the repair can be performed simultaneously from both sides of the carbonization chamber 11, the carbonization chamber 11 can be repaired efficiently without requiring a lot of work.

  Moreover, in the repair method of the coke oven which is one embodiment of the present invention, after the repair work is completed, the column 100 is pushed out in the direction of the kiln 11a of the carbonization chamber 11 by using the extruder 16, so that the carbonization chamber is obtained. Since the column 100 is discharged from the 11 kilns 11a, the carbonizing chamber 11 can be repaired efficiently without requiring much time for clean-up.

〔Example〕
When performing spraying repair of the MS and CS kilns in the carbonization chamber separately using the prior art, the repair period including pre-preparation and post-cleaning was 2-3 days. On the other hand, using the repairing method according to the present invention, the column is inserted into the carbonization chamber, the furnace lids at both ends of the carbonization chamber are opened, and the thermal spray repair is performed on the furnace wall near the both-side kilns. Later, when a repair method was adopted in which the column was discharged out of the furnace using an extruder, the repair period was 1-2 days, and the work period was reduced by about 1 day.

  Although the embodiment to which the invention made by the present inventor is applied has been described above, the present invention is not limited by the description and the drawings that form a part of the disclosure of the present invention according to this embodiment. For example, since the carbonization chamber 11 is generally provided with 4 to 5 coal charging ports 14, the column 100 may be inserted from any one of the carbonization ports 14 in consideration of the repair range of the carbonization chamber. . Moreover, it is also possible to insert the support | pillar 100 in the some coal charging opening 14, and in that case, while the effect which blocks | prevents circulation of air improves, the temperature fall between the support | pillars 100 can be reduced.

  Moreover, since the support | pillar 100 aims at preventing distribution | circulation of air, it does not necessarily need to provide the heat insulation block 104. FIG. However, considering the repair period of the carbonization chamber 11, it is desirable that the support column 100 be formed of a material that can withstand the temperature of about 1000 ° C. in the carbonization chamber 11 for a maximum of about 3 days. As described above, other embodiments, examples, operation techniques, and the like made by those skilled in the art based on the present embodiment are all included in the scope of the present invention.

DESCRIPTION OF SYMBOLS 11 Carbonization chamber 11a Kiln port 12 Combustion chamber 13 Heat storage chamber 14 Charging port 15 Charcoal vehicle 16 Extruder 17 Guide wheel 18 Fire extinguisher 21 Furnace lid 22 Door frame 23 ２４ 24 閂 Receiving 100 Support column 101 Frame body 102 Locking member 103 Reinforcement Member 104 Thermal insulation block 110 Lance

Claims (4)

A repair member having substantially the same height as the height of the carbonization chamber from the coal inlet of the carbonization chamber, and containing a plurality of heat insulation blocks in which the heat insulation material folded in a rectangular parallelepiped frame is bound. A column insertion step for preventing the flow of air between the kilns at both ends of the carbonization chamber by inserting a repair member ,
An opening step of opening the kiln mouths at both ends by removing the furnace lids at both ends of the carbonization chamber after the column insertion step;
A repair step of repairing the furnace wall in the carbonization chamber from the kilns at both ends of the carbonization chamber;
A method for repairing a coke oven, comprising:   After the repair step is completed, the method includes the step of discharging the repair member from the furnace port of the carbonization chamber by pushing the repair member in the direction of the furnace port of the carbonization chamber using an extruder. The method of repairing a coke oven according to claim 1. A rectangular parallelepiped frame having a height substantially equal to the height of the carbonization chamber;
A plurality of heat insulating blocks formed by binding folded heat insulating materials housed in the frame body;
A member for repairing a coke oven, comprising:   The member for repairing a coke oven according to claim 3, wherein the heat insulating block is formed by binding a folded heat insulating material with a thermoplastic resin band.

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