JP5050694B2 - Heat insulation box for repairing coke oven carbonization chamber and method for repairing coke oven - Google Patents

Description

  The present invention relates to a heat insulating box suitable for repairing a coke oven carbonization chamber, particularly a bottom brick, and a repair method using the heat insulating box.

  In the coke oven, a carbonization chamber for charging coal and dry distillation into coke and a combustion chamber for supplying heat to the carbonization chamber are alternately stacked. Such a coke oven is a structure mainly composed of silica bricks, including side wall bricks (carbonization chamber walls) separating the carbonization chamber and the combustion chamber, and its lifetime is said to be 30 to 50 years. .

  In the coke oven, the carbonized coke is discharged by an extruder, and coal is charged again, and the next carbonization is performed. These are repeated at a cycle of about 20 hours. Therefore, due to mechanical friction at the time of coke discharge and long-time operation in a furnace atmosphere at a high temperature of about 1000 ° C., the bricks constituting the coke oven have deteriorated over time, and recently, the bricks in the carbonization chamber The progress of wear / defects has become remarkable. Therefore, thermal spray repair and hot brick replacement repair are implemented as countermeasures against deterioration.

Patent Document 1 is disclosed as a repair device for a coke oven carbonization chamber bottom brick. As shown in FIG. 6, this apparatus inserts the box 2 containing the mortar 1 into the carbonization chamber 3 and pulls it on the bottom brick 3a of the carbonization chamber 3 so that the mortar 1 in the box 2 is worn out or missing. It spreads on the bottom brick 3a.
No. 07-7302

  The apparatus disclosed in Patent Document 1 has an advantage that the bottom of the carbonization chamber can be easily repaired, rather than a large-scale repair such as thermal spray repair or hot brick replacement repair. However, the life of the repaired part is as short as about one year due to mortar wear or peeling at the repaired part.

  Permanent repair of the bottom of the carbonization chamber is almost the same as when building a furnace, and a long life expectancy can be expected, but hot brick replacement is effective, but hot brick replacement Repairs were mainly carried out on the wall of the carbonization chamber, and no transshipment repair was performed on the bottom bricks.

  By the way, the coke oven is narrow and has a depth of about 0.4 m with respect to a height of about 6 to 7 m and a length of about 14 to 16 m. Here, the width direction of the coke oven refers to the direction in which the carbonization chamber and the combustion chamber overlap, the length direction refers to the direction perpendicular to the width direction in the horizontal plane, and the height direction refers to the width direction and the length direction. Is literally the height direction.

Therefore, at the time of brick transshipment repair at the bottom of the carbonization chamber, it is necessary to secure a workable space while preventing heat in the furnace while taking into account the dimensions of the coke oven.
A number of heat-insulating boxes have been proposed as a device that takes into account heat insulation for brick repair in a coke oven carbonization chamber. These devices are also called heat insulation devices, heat insulation devices, or simply repair (for) devices, but have a box shape because they are placed in a coke oven having the above dimensional characteristics. In the present specification, the term “insulated box” will be used hereinafter.

For example, Patent Document 2 discloses a self-supporting heat insulating box 4 as shown in FIG. The heat insulation box 4 is inserted into the carbonization chamber 3 to be repaired, and cold air is fed into the work space 4a of the heat insulation box 4 from the cold air supply duct 4b, while the work window 4c in the work space 4a is replaced with a new brick, Perform repair work such as transshipment.
JP 05-239462 A

  Since the heat insulation box disclosed in Patent Document 2 is for repairing the carbonization chamber wall (the furnace wall of the carbonization chamber), when it is used for repairing bricks during the heat at the bottom of the carbonization chamber, The following problems occur.

  That is, the heat insulation box 4 disclosed in Patent Document 2 is in a state of being placed on the bottom brick 3a of the carbonization chamber 3 as shown in FIG. Therefore, when the bottom brick 3a of the carbonization chamber 3 is transshipped, the floor brick 4a of the heat insulation box 4 is first removed, then the bottom brick 3a of the carbonization chamber 3 is disassembled, and then brick replacement is performed. In addition, 5 in FIG. 8 shows a combustion chamber.

  For this reason, as the bottom brick is dismantled, the position of the heat insulation box is lowered and becomes unstable. Moreover, since the bricks cannot be transshipped at the portion where the heat insulation box is in contact, the entire bottom brick cannot be transshipped if the repair covers a wide range.

As means for solving the problems of Patent Document 2, Patent Document 3 discloses a method of repairing the thermal insulation box 4 by suspending it from above as shown in FIG.
JP 56-125481 A

  In this method, there is no decrease in the height direction position of the heat insulation box due to dismantling the bottom brick of the carbonization chamber, but a large cart is required when inserting the heat insulation box, and there is a disadvantage that the whole apparatus is enlarged. is there.

  Further, as shown in FIG. 9, the insertion cart 6 of the heat insulation box 4 is usually installed on the work deck 7 below the kiln of the carbonization chamber 3, so that an extrusion vehicle or a guide vehicle used for coke oven operation is used. Interfering with traveling, the repair work of the carbonization chamber 3 may be an obstacle to the coke oven operation.

Therefore, Patent Document 4 discloses an apparatus that can divide a heat insulating box for repairing a coke oven into several parts and install the coke oven in a carbonization chamber simply and in a short time. However, the apparatus disclosed in Patent Document 4 is also intended for transshipment of the carbonization chamber wall, and a guide plate is laid on the bottom brick when inserted into the carbonization chamber. I can't.
JP 2000-8044 A

  As described above, the conventional heat insulation box used for the brick transshipment repair of the carbonization chamber is intended for the brick transshipment of the carbonization chamber wall.

  When such a heat insulation box is used for transshipment repair of the bottom brick of the carbonization chamber, if it is hung from the top, the equipment becomes larger than necessary, and the work of inserting the heat insulation box from the outside of the coke oven is the coke operation. Interfere with.

  On the other hand, in the self-supporting heat insulating box, when the bottom brick of the carbonization chamber is dismantled, the position of the heat insulating box in the height direction is lowered, and for this reason, a range in which brick replacement is impossible occurs.

  The problem to be solved by the present invention is that, in the case of the brick-replacement repair at the bottom of the carbonization chamber using the conventional heat insulation box, in the form of hanging from the top, the device becomes larger than necessary, and the work of inserting the heat insulation box is the coke operation. It is a point that interferes with. In the case of the self-supporting type, the position in the height direction of the heat insulating box is lowered when the bottom brick of the carbonization chamber is dismantled, so that a range in which brick replacement is impossible occurs.

The heat insulation box for repair of the coke oven carbonization chamber of the first invention is
In order to prevent a range in which the transshipment of the bottom brick is impossible when using a self-supporting insulation box,
An insulation box that is inserted into the coking chamber of the coke oven and used to repair the bottom brick of the coking chamber from the inside,
A part or all of the floor surface of the heat insulation box is configured to be openable,
The main feature is that the height level in the furnace height direction of the floor surface position can be adjusted.

In the heat insulation box for repair of the coke oven carbonization chamber of the present invention,
When the heat insulation box is configured to be connectable in the furnace length direction and configured to be able to come and go between the connected heat insulation boxes, the repaired portion of the carbonization chamber bottom brick is longer than the length of the heat insulation box. In some cases, the bottom brick can be repaired. This is the repair box of the second invention.

When the length of the repair portion of the bottom brick of the coke oven carbonization chamber is shorter than the length of the repair box, the coke oven carbonization chamber is used by using the heat insulation box for repair of the coke oven carbonization chamber according to the first aspect of the present invention. When repairing the bottom brick of
After inserting the insulation box to the bottom brick repair position of the carbonization chamber,
Repair the brick at the bottom of the carbonization chamber by opening part or all of the floor of the heat insulation box.
This is the coke oven repair method according to the first aspect of the present invention.

On the other hand, if the length of the repair part of the bottom brick is longer than the length of the repair box,
After inserting a plurality of the heat insulation boxes of the second invention of the present invention sequentially to the bottom brick repair position of the carbonization chamber, these heat insulation boxes are connected to each other,
Thereafter, a part or all of the floor surface of these heat insulation boxes is opened to repair the bottom brick of the carbonization chamber.
This is the repair method for the coke oven according to the second aspect of the present invention.

In the first and second coke oven repair methods of the present invention,
After inserting to the repair position of the bottom brick of the carbonization chamber,
It is desirable to fix the height level in the furnace height direction of the floor surface position of the heat insulation box so as to maintain the height level when the heat insulation box is inserted.

  According to the present invention, in the brick refill repair of the coke oven carbonization chamber, it has become possible to smoothly perform the repair without interfering with the heat insulation box and the repair range.

Hereinafter, the best mode for carrying out the present invention will be described with reference to FIGS.
FIG. 1 is a diagram showing a functional image of the heat insulation box for repairing the bottom of the carbonization chamber of the present invention, FIG. 2 is a diagram showing an example of the heat insulation box for repairing the bottom of the carbonization chamber of the present invention, and FIG. The figure which showed an example of the heat insulation box for carbonization chamber bottom repair of this invention, FIG. 4 is explanatory drawing of the repair method of the carbonization chamber bottom part using the heat insulation box of 1st this invention, FIG. 5 is 2nd this invention. It is explanatory drawing of the repair method of the carbonization chamber bottom part which used the heat insulation box.

  By the way, in brick repair at the bottom of the coke oven carbonization chamber, whether to insert one heat insulation box or two or more depends on the length per heat insulation box, the range of bricks to be repaired, and the position from the kiln entrance. Needless to say.

  If the length of the heat insulation box is increased, the range in which only one heat insulation box can be inserted and repaired is expanded, and the number of insertions can be reduced even when two or more heat insulation boxes are inserted. However, in the first place, an increase in the size of the heat insulation box should be avoided since it causes problems that interfere with the running of the extrusion wheel and the guide wheel used for coke oven operation as described above.

On the other hand, if the length of the heat insulation box is shortened, flexible operation is possible, but the number of heat insulation boxes to be inserted increases and the work becomes complicated.
Therefore, when using the heat insulation box, the length may be appropriately determined according to the equipment conditions and the contents of repair after taking these into consideration, and this is also the case in the present invention.

  The heat insulation box 11 for repairing the bottom of the carbonization chamber of the present invention is characterized in that, for example, as shown in FIG. 1, the central portion of the floor surface 11a of the heat insulation box 11 can be removed. Thus, by removing the central portion of the floor surface 11a and providing an opening in the floor surface 11a, it becomes possible to dismantle the bottom brick of the carbonization chamber and transship the brick from inside the heat insulating box 11.

  In addition, for example, extendable support legs 12 are installed at the four corners of the floor surface 11a so that the height position of the floor surface 11a in the furnace height direction can be adjusted. By adjusting the amount of protrusion of the support leg 12 from the floor surface 11a, when the bottom brick of the carbonization chamber is dismantled, the height position of the floor surface 11a in the furnace height direction is lowered, and it is difficult to replace the brick. Or it can prevent becoming impossible.

  The opening area of the floor surface 11a formed in the heat insulation box 11 for repairing the bottom of the carbonization chamber of the present invention is not particularly limited, but considering the ease of repair, the entire floor surface 11a can be opened as wide as possible. It is desirable to configure.

  When the entire floor surface 11a is configured to be openable, the adjustment mechanism for the height position of the floor surface 11a is installed outside the heat insulation box 11. In this case, the adjustment of the height position is performed inside the heat insulation box 11. It goes without saying that it can be done from the beginning.

Next, the detailed drawing of the heat insulation box 11 of this invention is shown in FIG. 2 and FIG.
The heat insulation box shown in FIG. 2 is used as a leading heat insulation box when inserted into the carbonization chamber alone or when a plurality of heat insulation boxes are inserted.

  In the heat insulating box 11 shown in FIG. 2, a heat insulating board 11b and an iron plate 11c for cutting off heat from the carbonization chamber are attached to the front portion. There is no insulation board and iron plate attached. Note that “front” and “rear” indicate the direction of travel when the heat insulation box is inserted into the furnace from the furnace port of the carbonization chamber. Side, “rear” indicates the front side in the furnace.

On the other hand, the heat insulation box shown in FIG. 3 is used as a heat insulation box inserted after the head (second or later) when a plurality of heat insulation boxes are inserted into the carbonization chamber.
The heat insulation box 11 shown in FIG. 3 is hollow in the insertion direction so that workers can pass through, and the heat insulation board and the iron plate are not attached to the front part and the rear part.

  The heat insulation box 11 of the present invention shown in FIGS. 2 and 3 is provided in the above-described rear part (FIG. 2) or the front part and the rear part (FIG. 3) of the steel frame 11d which is a cuboid frame. The opening portion and the surface portion excluding the floor surface 11a are covered with a heat insulating board 11b.

  Moreover, the heat insulation box 11 of the present invention is provided with a top plate 11e for countermeasures against falling of the ceiling brick in the carbonization chamber at the upper part, and at four places at the bottom part, wheel receivers 11f are attached and wheels 11g are installed. It is designed to be able to move smoothly during insertion and withdrawal of 1.

  In the present invention, as explained in FIG. 1, the floor surface 11a can be removed so that the bottom brick of the carbonization chamber can be repaired, and the height of the floor surface position in the furnace height direction when the bottom brick is dismantled. In order to prevent a decrease in level, support legs 12 are installed at four locations on the floor surface 11a.

  In the heat insulation box 11 of the present invention having such a configuration, the heat insulation box 11 is smoothly moved when inserted into the carbonization chamber (before brick transshipment) or pulled out from the carbonization chamber (after brick transshipment). The support leg 12 is not brought into contact with the bottom of the carbonization chamber.

  However, when dismantling the bottom brick, it is necessary to extend the support leg 12 and maintain the height level in the furnace height direction at the floor position at substantially the same height as when inserted into the carbonization chamber. For this reason, the support leg 12 is provided with a plurality of bolt holes 12a, and the projecting amount of the support leg 12 from the floor surface 11a is adjusted by selecting the bolt hole 12a that matches the bolt hole provided in the steel frame 11d. I can do it. 2 and 3 is a bolt inserted into the bolt hole 12a.

  In the heat insulation box 11 shown in FIG. 2, a connection jig 14 provided with a bolt hole 14a on the rear side of the steel frame 11d is installed so as to connect the heat insulation boxes 11 when a plurality of heat insulation boxes 11 are inserted. is doing.

  On the other hand, the heat insulation box 11 shown in FIG. 3 is provided with a bolt hole 11da on the front side of the steel frame 11d for connection with the heat insulation box 11 inserted earlier, and a bolt on the rear side of the steel frame 11d. A connecting jig 14 provided with a hole 14a is provided.

  Next, a method for repairing the bottom of the coke oven carbonization chamber using the heat insulating box 11 of the present invention will be described.

  First, FIG. 4 shows a case where one heat insulating box 11 is inserted to repair the coking oven bottom of the coke oven.

  The heat insulation box 11 is inserted into the carbonization chamber 3 from the kiln, and stopped at a predetermined position for carrying out repairs. Next, the floor surface 11a of the heat insulation box 11 is removed and opened, and a deteriorated portion of the bottom brick is confirmed to determine a portion 3b where the brick is disassembled (see FIG. 4A).

  In the example of FIG. 4, the bottom brick just below the wheels 11g of the heat insulation box 11 is also dismantled. Therefore, before the bottom brick 3a is dismantled, the support leg 12 is extended downward and fixed in a state where the brick is not grounded. In the dismantling of the bottom brick 3a, the floor surface position of the heat insulating box 11 is prevented from being lowered.

  Therefore, the level in the height direction of the floor surface position of the heat insulation box 12 supported by the support legs 12 is approximately the height of the floor surface 11a when the heat insulation box 11 is inserted, and changes in the process of dismantling the bottom brick 3a. Need to be fixed without.

  After the above operation is completed, the bricks of the bottom brick dismantling part 3b of the carbonization chamber 3 are dismantled (see FIG. 4 (b)), and then the new bricks are transshipped so that the entire dismantling part is the bottom bricking completion part. The brick transshipment is completed as 3c (see FIG. 4C).

  When the repair is completed, the wheel 11g is in contact with the bottom of the carbonization chamber again, so the support leg 12 is contracted and the heat insulation box 11 is pulled out of the furnace.

Next, FIG. 5 shows a case where a plurality of heat insulation boxes 11 are inserted to repair the bottom of the coking oven carbonization chamber.
In this case, after the plurality of heat insulation boxes 11 are inserted into the carbonization chamber 3, the heat insulation boxes 11 are connected to each other using the connection jig 14.

  If the plurality of heat insulating boxes 11 are connected before being inserted into the carbonization chamber 3, the entire length of the heat insulating box 11 in the connected state becomes large, and problems such as being unable to be placed on the work deck arise. It is because the meaning which made the heat insulation box 11 plural is lost.

  The heat insulation boxes 11 may be connected to each other even after a plurality of heat insulation boxes 11 are inserted into the carbonization chamber 3 and connected each time the second and subsequent heat insulation boxes 11 are inserted into the carbonization chamber 3. May be.

  Since the plurality of heat insulation boxes 11 inserted into the carbonization chamber 3 in this way are placed on the damaged (worn / deleted) portion of the furnace bottom, the height level of the floor surface position of the heat insulation box 11 is a regular carbonization. It is lower than the case where the heat insulation box 11 is placed on the bottom of the room (see FIG. 5A).

  Therefore, the work until the support legs 12 are extended is the same as that described with reference to FIG. 4, but in this case, bricks are stacked after removing the wheel 11g located at the repair location (FIG. 5 ( b)).

  And since the height level of the bottom brick 3a returns to a regular level after the bottom brick 3a is transshipped, it is difficult to insert the removed wheel 11g, so it is smaller than the previously removed wheel 11g. A size wheel 11g is installed (see FIG. 5C).

  After the bottom brick 3a of the carbonization chamber 3 is transshipped, the heat insulating box 11 is pulled out. In this case, since the heat insulating boxes 11 are connected to each other by the connecting jig 14, they are connected using a device such as a chain block or a winch. The entire heat insulation box 11 should be pulled out.

  As described above, when the heat insulation box 11 of the present invention is used, the transshipment repair of the bottom brick 3a of the coke oven carbonization chamber 3 can be easily performed without generating a range where the repair is impossible.

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

  For example, in the heat insulation box 11 shown in FIG. 2, the connection jig 14 is installed behind the component frame 11d. However, in the case of the heat insulation box 11 dedicated for repair alone, the connection jig 14 is not necessary. is there.

  When only a part of the floor surface 11a of the heat insulation box 11 is removed and opened, the heat insulation board 11b may be attached to the floor surface 11a2 that is not removed.

It is the figure which showed the functional image of the heat insulation box for carbonization room bottom part repair of this invention. It is the figure which showed an example of the heat insulation box for carbonization room bottom repair of 1st this invention, (a) is a front view, (b) is a left view, (c) is a right view, (d) is a top view (E) is a bottom view, (f) is an explanatory view of a height adjustment mechanism. In addition, the heat insulation box of FIG. 2 can be used as the first heat insulation box of the second aspect of the present invention by connecting the heat insulation box of FIG. 3 with the heat insulation box of FIG. (A)-(e) is the same as that of FIG. 1 (a)-(e) which showed an example (insulation box of the type connected to a head insulation box) of the heat insulation box for carbonization chamber bottom repair of 2nd this invention. FIG. (A)-(c) is a figure explaining the repair method of the carbonization chamber bottom part using the heat insulation box of 1st this invention later on. (A)-(c) is a figure explaining the repair method of the carbonization chamber bottom part using the heat insulation box of 2nd this invention later on in order. It is the figure which showed the image of the mortar repair apparatus of the carbonization chamber bottom part disclosed by patent document 1. FIG. It is a schematic perspective view of the heat insulation box for carbonization chamber wall repair disclosed by patent document 2. FIG. It is the figure which showed the image which installed the heat insulation box shown in FIG. 7 in the carbonization chamber. It is the figure which showed the image before carbonization chamber insertion of the rail suspension type heat insulation box disclosed by patent document 3. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Carbonization chamber 3a Furnace bottom 3b Bottom brick demolition part 3c Bottom brick pile completion part 11 Heat insulation box 11a Floor surface 11da Bolt hole 12 Support leg 12a Bolt hole 13 Bolt 14 Connection jig 14a Bolt hole

Claims (5)

An insulation box that is inserted into the coking chamber of the coke oven and used to repair the bottom brick of the coking chamber from the inside,
A part or all of the floor surface of the heat insulation box is configured to be openable,
A heat insulation box for repairing a coke oven carbonization chamber, wherein the height level in the furnace height direction of the floor surface position is adjustable. The heat insulation box is configured to be connectable in the furnace length direction,
The heat insulation box for repairing a coke oven carbonization chamber according to claim 1, wherein the heat insulation boxes connected to each other are configured to be able to come and go. A method for repairing the bottom brick of a coke oven carbonization chamber,
After inserting the heat insulation box of claim 1 to the bottom brick repair position of the carbonization chamber,
A repair method for a coke oven, wherein a part or all of the floor surface of the heat insulation box is opened to repair the bottom brick of the carbonization chamber. A method for repairing the bottom brick of a coke oven carbonization chamber,
After sequentially inserting the heat insulation boxes of claim 2 to the bottom brick repair position of the carbonization chamber, these heat insulation boxes are connected to each other,
Thereafter, a part of or all of the floor surface of the heat insulation box is opened to repair the bottom brick of the carbonization chamber. After inserting to the bottom brick repair position of the carbonization chamber,
The method for repairing a coke oven according to claim 3 or 4, wherein the height level in the furnace height direction of the floor surface position of the heat insulation box is fixed so as to maintain the height level when the heat insulation box is inserted.

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