JP2011140600A - Support device for heat insulation plate for hot repair of coke oven and installation method of the support device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent occurrence of thermal deformation of a support device for a heat insulation plate. <P>SOLUTION: The support device 11 supports the heat insulation plate 12 sectioning a non-repair region and a repair region in hot repair of bricks of a carbonization chamber 1a in a coke oven 1. A space 11g is formed inside the support device 11. Means 11i and 11j are arranged for supplying a cooling medium to the space 11g from the outside of the support device 11. The support device 11 is installed so that a discharge port arranged on one end face 11b of the support device 11 is disposed on a furnace port side of the carbonization chamber 1a for discharging the cooling medium supplied to the space 11g to the outside of the carbonization chamber 1a after cooling the support device 11. In this way, since the support device causes no thermal deformation in hot repair of the bricks of the carbonization chamber in the coke oven, the heat insulation plate can be supported stably, and heat insulation of bricks in the non-repair region is ensured, while workers inside the carbonization chamber can work safely. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention provides a heat insulation plate for partitioning a non-repaired part region and a repaired part region in a carbonization chamber when hot repairing bricks of a chamber furnace type coke oven (hereinafter simply referred to as a coke oven). The present invention relates to a support device and a method of installing the support device in a carbonization chamber.

  The coke oven is constructed of refractory bricks, and combustion chambers that burn fuel gas and carbonization chambers that heat and dry-distill the charged coal with the heat generated in the combustion chambers are arranged alternately. It has a structure.

  Coal at normal temperature or near normal temperature is charged into the carbonization chamber, and coke of about 1273K is generated by heating and dry distillation. The generated coke is mechanically discharged from the other end side to the one end side of the carbonization chamber, and then the work such as preparation for charging the next coal into the carbonization chamber is performed. These processes constitute one cycle, and the production of coke is continued by repeating this cycle.

  Therefore, since the thermal shock at the time of coal charging and mechanical friction at the time of coke discharge are applied to the furnace wall of the carbonization chamber composed of refractory bricks, Deformation of the wall and damage such as cracks and cracks occur in the refractory bricks constituting the furnace wall. If the operation is further continued in this state and these damages penetrate to the combustion chamber, coal in the carbonization chamber and gas generated from the coal flow into the combustion chamber.

  When coal or gas generated from coal flows into the combustion chamber, not only does the fuel gas not burn sufficiently, but the coal that flows into the combustion chamber closes the fuel gas port and air port at the bottom of the combustion chamber, The supply of fuel gas and air to the combustion chamber is hindered and combustion is not performed. If combustion does not take place, the coal charged in the carbonization chamber cannot be heated and dry-distilled, and the coke oven cannot be operated. We are repairing the bricks of the parts to be done.

  When repairing the furnace wall of the carbonization chamber, if the damage is minor, repair will be performed by spraying an irregular refractory or spraying. However, if damage progresses, the above repair cannot deal with it, and it is necessary to partially replace the brick at the damaged part. For this repair, a so-called hot repair work is performed to repair the relevant part while continuing the operation of the entire coke oven.

  At the time of this hot repair, a temperature decrease of the bricks other than the repair brick at the damaged part is inevitable. Therefore, in order to prevent shrinkage and cracking due to the temperature decrease, it is necessary to maintain a high temperature state of 800 ° C. or higher. On the other hand, in the repair area, it is necessary to protect workers who enter the corresponding carbonization chamber and perform repairs from this high-temperature furnace wall.

  Therefore, when hot repairing the furnace wall of the carbonization chamber, a heat insulating plate for keeping the furnace wall warm and protecting the worker is installed between the non-repaired area and the repaired area. That is, by separating the non-repaired part region and the repaired part region by a heat insulating plate, the non-repaired part brick is maintained at a temperature of 800 ° C. or more and protects an operator who performs repair in the repaired part region.

  As a general means for installing the heat insulating plate, there is a method in which a support device is installed on the ceiling of the carbonization chamber portion to be repaired, and then the furnace cover is removed and the heat insulating plate is attached to the support device in a suspended form from the outside of the furnace. It has been adopted. In this case, an I-type rail is used as the supporting device, and a roller that engages with the I-type rail is usually installed on the top of the heat insulating plate.

  However, when the support device is installed in the carbonization chamber, since the heat insulation plate is not yet installed on the furnace wall of the carbonization chamber, the support device is exposed to an atmosphere of 800 ° C. or more in the carbonization chamber and is subjected to thermal deformation. There was a problem of waking up.

  In order to prevent thermal deformation of the support device, there is also a method of temporarily lowering the furnace wall temperature at the time of installation, but the furnace wall of the carbonization chamber is constructed of meteorite bricks, and when the temperature falls below 800 ° C, the bricks Shrinkage causes damage and is not a preferred method.

  Also, if the support device is thermally deformed, it becomes an obstacle when inserting the heat insulation plate, the suspended heat insulation plate is displaced and the heat insulation effect is reduced, or the heat insulation plate is detached from the support device and work in the carbonization chamber There is a risk of falling on the person.

  In addition, the carbonization chamber has a narrow structure with a width of about 450 mm and a total length of about 15 m, and the working environment is poor at high temperatures. Therefore, the heat insulating plate can be installed in a short time to protect the worker from the hot environment. There is a need.

  These issues have existed in the past, but the part of the coke oven that was damaged and repaired was often damaged in the area close to the coking chamber kiln, so it became obvious as a major problem. There were few.

  However, the more the part to be repaired is located inside the coking chamber kiln, the higher the atmosphere temperature in the coking chamber and the longer the time required for installation of the supporting device. As a result, the supporting device has a higher temperature. As a result, the above-mentioned problems increase.

  Accordingly, various techniques for improving that the work load required for installing the support device and attaching the heat insulating plate is large and time consuming are disclosed.

  For example, in Patent Document 1, after inserting an I-shaped rail, in which a heat insulating plate having a plurality of traveling rollers on the upper side and supported in a suspended form on a lower flange portion, is inserted into the carbonization chamber from the carbonization chamber kiln, A technique for feeding a heat insulating plate into a carbonization chamber along a flange is disclosed.

  Patent Document 2 discloses a technique in which a suspension beam with a heat-insulating curtain suspended is inserted and installed in a carbonization chamber.

  The technologies disclosed in these Patent Documents 1 and 2 are technologies intended to improve the working conditions, and have a certain level of improvement effect on the above problems, but the improvement effect is not yet sufficient. .

  That is, in the technique disclosed in Patent Document 1, the I-type rail is inserted until the I-type rail is inserted into the carbonization chamber and fixed to the ceiling with a support rod, or until the heat insulating plate is inserted into the carbonization chamber. Is exposed to a high temperature atmosphere in the carbonization chamber. In this state, the I-shaped rail that is not considered for heat insulation and cooling may cause thermal deformation.

  Also in the technique disclosed in Patent Document 2, the support device is in a similar state until the auxiliary beam is removed after the suspension beam with the heat-insulating curtain suspended is inserted into the carbonization chamber and fixed.

JP-A-9-302352 JP 59-113088 A

  The problem to be solved by the present invention is that the techniques disclosed in Patent Documents 1 and 2 have a certain degree of improvement effect, but the improvement effect is not yet sufficient, and a support device for a heat insulating plate That is, there is a possibility that the I-shaped rail and the hanging beam may cause thermal deformation.

The support device for the heat-insulating plate for hot repair of the coke oven of the present invention,
In order to prevent the heat insulating plate support device from undergoing thermal deformation,
When repairing the coking chamber brick of the coke oven hot, it is a support device that supports a heat insulating plate that divides the non-repair area and the repair area,
The main feature is that a space is formed inside the support device, and means for supplying a cooling medium to the space from the outside of the support device is provided.

  In the present invention, since a space is formed inside the support device and a means for supplying a cooling medium to the space from the outside of the support device is provided, the support device is used when performing hot repair of the carbonization chamber brick of the coke oven. Does not cause thermal deformation. Therefore, the heat insulating plate can be stably supported, the heat insulation of the bricks in the non-repaired portion is ensured, and the worker in the carbonization chamber can work safely.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic which shows the structure of the support apparatus of this invention, (a) is the figure seen from upper direction, (b) is the figure seen from the side, (c) is the arrow AA figure of (b) figure, (D) is BB sectional drawing of (b) figure. It is a figure explaining the discharge hole of internal piping, (a) is a longitudinal cross-sectional view of the discharge hole part of internal piping, (b) is the figure seen from the paper upper surface of (a) figure. It is a figure which shows the state which installed the support apparatus of this invention in the ceiling of the carbonization chamber. It is the figure which showed the condition which suspends a heat insulation board on the rail structure part of the lower part of a support apparatus, and inserts it in a carbonization chamber after installing a support apparatus in the ceiling of a carbonization chamber. It is the figure which showed the condition which put the roller of the heat insulation board on the rail part of the support apparatus of this invention. It is the layout of the discharge hole of the cooling piping installed in the space of the support apparatus of this invention, (a) is sectional drawing seen from the side, (b) is the figure seen from upper direction. It is the figure which showed the state before installing the support apparatus of this invention in a carbonization chamber upper part. It is the figure which showed the relationship between the atmospheric temperature of a carbonization chamber, and the internal temperature of a support apparatus.

  In the present invention, for the purpose of preventing thermal insulation of the support device for the heat insulating plate, a space is formed inside the support device, and means for supplying a cooling medium to the space from the outside of the support device is provided. Realized.

  It is an object of the present invention to enable a heat insulating plate to be installed smoothly by preventing thermal deformation of a support device, and to stably support the heat insulating plate during a repair period.

  The inventors first considered covering the above-described support device with a heat insulating material in order to prevent the heat from affecting the support device. However, when the support device is covered with a heat insulating material, it becomes an obstacle to the heat insulation plate insertion work after the support device is installed, and it takes time to install the heat insulation plate, and the worker is exposed to the hot environment for a long time. Therefore, it is not effective.

  Therefore, a space part separated from the atmosphere of the carbonization chamber is formed inside the support device that supports the heat insulating plate when repairing the coking oven brick in the coke oven hot, and this space part is formed from the outside of the support device. The following invention was established with the idea of supplying a cooling medium.

  Hereinafter, the support device of the present invention for supporting a heat insulating plate when hot repairing a coking chamber brick of a coke oven will be described in detail with reference to the drawings.

  FIG. 1 shows a schematic configuration of a support device according to the present invention, where (a) is a view seen from above, (b) is a view seen from the side, and (c) is an arrow A view of (b). -A figure, (d) is BB sectional drawing of (b) figure.

  Reference numeral 11 denotes a support device for supporting the heat insulating plate 12, and a lower portion 11a has a rail structure in which a roller 12a rotatably attached to the upper surface of the heat insulating plate 12 can move from one end surface 11b to the other end surface 11c.

  Further, on the upper surface 11d of the support device 11, for example, a support bar 11e is installed at the center, and a connection portion 11f is installed at a position on the one end surface 11b side, and the support device 11 is connected via the support rod 11e and the connection portion 11f. Is installed on the ceiling 1aa of the carbonization chamber 1a.

  In the present invention, a space 11g is formed from the one end face 11b to the other end face 11c so that the inside of the support device 11 is formed as a cavity and is separated from the atmosphere of the carbonization chamber 1a of the coke oven 1.

  And the one end surface 11b of the support apparatus 11 is opened, for example, and the other end surface 11c is shielded by the closing plate 11h. When the support device 11 is installed in the carbonizing chamber 1b of the coke oven 1, it is attached so that one end surface 11b is on the kiln side of the carbonizing chamber 1a and the other end surface 11c is on the inside of the carbonizing chamber 1a. This is the installation method of the support device 11 of the present invention.

  Inside the space 11g, for example, two internal pipes 11i are installed from one end face 11b to the other end face 11c, and the end 11ia of the inner face pipe 11i on the one end face 11b side is connected to connect to the external pipe 11j. is doing.

  Further, the end portion 11ib of the inner pipe 11i on the other end face 11c side is closed with a steel plate, and the cooling medium sent to the inner pipe 11i enters the space 11g only from the discharge hole 11ic provided as shown in FIG. I am trying to discharge.

  By appropriately setting the number, opening area, or opening position of the discharge holes 11ic, an optimum amount of cooling medium is supplied to an arbitrary position from the one end surface 11b side to the other end surface 11c side inside the support device 11. be able to.

  For example, normally, the inner side of the carbonizing chamber 1a is hotter than the side of the kiln, so it is desirable to cool the other end surface 11c side of the support device 11 more than the one end surface 11b side. Therefore, when it is desired to increase the cooling on the other end face 11c side, it can be adjusted by increasing the number of discharge holes 11ic on the other end face 11c side of the internal pipe 11i or increasing the opening area.

  The cooling medium supplied from the outside to the internal pipe 11i via the external pipe 11j is discharged only from the discharge hole 11ic into the space 11g of the support device. Since the other end surface 11c located inside the carbonization chamber 1a is shielded by the closing plate 11h, the cooling medium discharged into the space 11g proceeds in the direction toward the kiln opening through the space 11g. It is discharged from the opening to the outside of the carbonization chamber 1a.

  The state which installed the support apparatus 11 in the ceiling 1aa of the carbonization chamber 1a is shown in FIG. The support device 11 is supported by a support bar 11e and a backstay support bar 13 connected to the connection portion 11f. The upper part of the support bar 11e is fixed by a furnace top support jig 14 inserted from a charging hole 1ab provided in the ceiling 1aa of the carbonization chamber 1a, and the upper part of the backstay support bar 13 is fixed to the backstay 2. Has been.

  The end 11 ia on one end surface 11 b side (carbonization chamber kiln side) of the internal pipe 11 i installed in the space 11 g formed inside the support device 11 is taken out of the cooling medium installed on the furnace top 1 b of the coke oven 1. It is connected by a pipe 11k which is a mouth and an external pipe 11j.

  FIG. 4 is a view showing a state in which after the support device 11 is installed on the ceiling 1aa of the carbonization chamber 1a, the heat insulating plate 12 is suspended from the rail portion 11aa of the lower portion 11a of the support device 11 and inserted into the carbonization chamber 1a. is there.

  A plurality of rollers 12 a are rotatably attached to the upper side of the heat insulating plate 12. When the heat insulating plate 12 is installed inside the carbonization chamber 1a, as shown in FIG. 5, the roller 12a is placed on the rail portion 11aa of the lower portion 11a of the support device 11, and in this state, the heat insulating plate 12 is pushed to press the carbonization chamber 1a. Insert inside.

  As described above, in the present invention, the cooling medium is supplied from the outside of the support device 11 to the space 11g inside the support device 11 via the external pipe 11j and the internal pipe 11i, so that the support device 11 is made of a heat insulating material. The temperature rise can be suppressed without covering and thermal deformation can be prevented. Therefore, it becomes possible to install the heat insulation board 12 smoothly in the inside of the carbonization chamber 1a, and to support the installed heat insulation board 12 stably.

  In the installation method of the support device 11 according to the present invention, the cooling medium discharge port after cooling the support device 11 is positioned on the kiln opening side of the support device 11. It can be discharged directly to the outside of the carbonization chamber 1a.

  Therefore, when the cooling medium is a gas, the heated exhaust does not come into contact with the worker who is performing the repair work inside the carbonization chamber 1a. Even when the cooling medium is a liquid, one end face of the support device 11 is used. By attaching a drain nozzle to 11b, it can be easily discharged from the carbonization chamber 1a.

  Hereinafter, in order to confirm the effect of this invention, the implementation result at the time of using air as a cooling medium is demonstrated.

  As the support device 11 for the heat insulating plate 12 that divides the non-repair region and the repair region of the carbonizing chamber 1a of the coke oven 1, the one having the structure described in FIG. 1 was used. The support device 11 was formed by combining three channel steels having a length of 5 m and a thickness of 5 mm and a steel plate to form a space 11 g through which cooling air flows and a rail portion 11 aa. In the space 11g, two internal pipes 11i having a length of 4.8 m, an inner diameter of 30 mm, and a thickness of 3 mm were installed.

As shown in FIG. 6, the discharge holes 11 ic of the two internal pipes 11 i are opened at intervals of 450 mm at 10 locations, and the opening area is 0.25 cm ² from the four discharge holes 11 ic from the kiln opening side. The next three were 0.4 cm ² , and the three inside the carbonization chamber 1 a were 0.8 cm ² .

The installation status of the support device 11 will be described below.
As shown in FIG. 7, the lifting chain 4 is suspended from the top 1 b of the coke oven 1 to the deck 3 through the charging hole 1 ab of the carbonizing chamber 1 a to be repaired, and is temporarily placed on the deck 3. It was connected to a support bar 11e attached to the upper surface 11d.

  Further, an external pipe 11j was connected to a cooling air pipe 11k installed on the furnace top 1b of the coke oven 1, and dropped to the deck 3 in the same manner as the chain 4 described above, and connected to the end 11ia of the internal pipe 11i. Air of 20 liters / minute was flowed through the internal piping 11i, and the state was cooled before installation.

  In the cooled state, the chain 4 is pulled up from the furnace top 1b of the coke oven 1, and is elevated to the ceiling 1aa of the carbonization chamber 1a as shown in FIG. Eleven support rods 11e were connected. Moreover, the connection part 11f of the backstay 2 and the support apparatus 11 was connected via the backstay support bar 13, and installed in the ceiling 1aa of the carbonization chamber 1a.

  When the support device 11 is installed on the ceiling 1aa of the carbonization chamber 1a, the heat insulating material 15 is sandwiched between the support device 11 and the brick surface of the ceiling 1aa so as not to directly contact each other.

  After the installation work of the support device 11 is completed, the heat insulating plate 12 is inserted from the kiln opening, and the roller 12a attached to the upper side of the heat insulating plate 12 as shown in FIG. 5 is placed on the rail portion 11aa of the support device 11. 4 to complete the installation of the heat insulating plate 12.

  FIG. 8 shows the temperature measurement status of the atmosphere temperature of the carbonization chamber and the internal temperature of the support device when the support device of the present invention is installed on the ceiling of the carbonization chamber by the above procedure. The internal temperature of the support device is obtained by measuring the temperature of the space near one end surface of the support device. The atmosphere temperature in the carbonization chamber is a value obtained by measuring the temperature in the carbonization chamber near the other end face of the support device.

  On the day (day 0) on which the installation work of the support device was performed, the internal temperature of the support device that had been cooled could be maintained at 100 to 180 ° C. in the atmosphere temperature of the carbonization chamber exceeding 900 ° C.

  The heat insulation plate was installed between the support device and the coke oven ceiling on the third day. Until then, the atmosphere temperature of the carbonization chamber was 800 ° C or higher, but the internal temperature of the support device was kept around 100 ° C. We were able to. From the installation of the support device to the installation of the heat insulating plate, the support device was not thermally deformed and the work of inserting the heat insulating plate into the carbonization chamber could be performed smoothly.

  Further, during the repair of the carbonization chamber, the support device continued to be cooled, and the support device did not undergo thermal deformation or damage for about one month until the support device was removed. Further, since the air used for cooling was discharged outside the carbonization chamber, the heated exhaust hits the worker in the carbonization chamber and did not hinder the work.

  Table 1 below shows the temperatures of the supporting device and the carbonization chamber before the heat insulating plate is installed according to the prior art and the present invention. In the prior art, since there was no cooling mechanism in the support device, the temperature of the support device had risen to about 800 ° C., which is the same as the carbonization chamber atmosphere temperature. It became possible to prevent thermal deformation of the support device.

  The present invention is not limited to the above example, and it goes without saying that the embodiments may be changed as appropriate within the scope of the technical idea described in each claim.

  For example, in the above example, two internal pipes 11i are installed in the space 11g of the support device 11, but the number of cooling pipes 11i is not limited to two.

  The present invention described above is effective not only for hot repair of the carbonization chamber but also for hot repair of other furnaces.

DESCRIPTION OF SYMBOLS 1 Coke oven 1a Carbonization chamber 1aa Ceiling 1ab Insertion hole 1b Furnace 11 Support apparatus 11a Lower part 11aa Rail part 11b One end surface 11c Other end surface 11d Upper surface 11e Support rod 11f Connection part 11g Space 11h Closure plate 11i End 11i End of pipe 11a 11ic discharge hole 11j external piping 12 heat insulation plate 12a roller

Claims (4)

When repairing the coking chamber brick of the coke oven hot, it is a support device that supports a heat insulating plate that divides the non-repair area and the repair area,
A support device for a heat insulation plate for hot repair of a coke oven, characterized in that a space is formed inside the support device and means for supplying a cooling medium to the space from the outside of the support device is provided.   The cooling medium supply means includes an internal pipe having at least one discharge hole provided in the space, and an external pipe for supplying a cooling medium to the internal pipe from the outside of the support device. 2. The support device for a coke oven hot repair heat insulating plate according to claim 1, wherein the cooling medium supplied via the discharge hole is discharged from the discharge hole to the space portion of the support device.   3. The support device for a coke oven hot repair heat insulating plate according to claim 1, wherein a discharge port for the cooling medium supplied to the space is provided on one end surface of the support device.   The one side of the support device of the coke oven hot repair heat insulating plate support device according to claim 3, wherein the cooling medium supplied to the space portion is cooled outside the carbonization chamber after cooling the support device. A method of installing a support device for a heat insulation plate for hot repair of a coke oven, wherein the support device is attached so that a discharge port provided on an end surface is on a furnace port side of the carbonization chamber.

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