JP5333990B2 - Side heat insulating device and method for installing side heat insulating plate during hot transfer in coke oven carbonization chamber - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a side heat insulating device used when a brick in a coke oven carbonization chamber is hot-loaded, and a method of installing a side heat insulating plate constituting the side heat insulating device in the carbonizing chamber.

  A coke oven is a structure mainly composed of silica brick, and a carbonization chamber in which coal is charged and carbonized and a combustion chamber having a function of supplying heat for carbonization by gas combustion are alternately layered. It has the structure to do.

  It is said that the life of the coke oven is 30 to 50 years, and as a result of many years of operation up to this end of life, as shown in FIG. To do. In addition, 2 in FIG. 9 shows a combustion chamber.

  As a method for dealing with such deteriorated parts, thermal spray repair that sprays refractory material on the surface of deteriorated bricks and brick replacement repair that replaces deteriorated bricks with new bricks are carried out. Brick transshipment repair is generally performed while the coke oven is kept in a high temperature state, and is therefore referred to as hot brick transshipment repair or simply hot repair.

  Of these, the brick transshipment repair consists of a refractory material in the carbonization chamber furnace wall of the non-repaired part where brickwork transshipment repair is not performed in order to ensure the working environment (mainly heat countermeasures) for workers working in the carbonization chamber. A heat shield is installed to protect workers from radiant heat from the high temperature furnace wall.

  As shown in FIG. 10, as a method of installing the heat insulating plate during hot repair of the coke oven, as shown in FIG. And the method of interrupting | blocking the heat transfer from the non-repair part B to the repair part A is proposed (patent document 1). FIG. 10A is a cross-sectional view as seen from the plane direction. The left-right direction on the paper is referred to as the furnace length direction, the up-down direction on the paper is referred to as the furnace width direction, the right side of the paper is outside the furnace, and the left side of the paper is inside the furnace. It is called the side.

  The back side heat insulating plate 3 is installed to block heat transfer from the back side of the carbonizing chamber 1 which is the non-repairing portion B to the repairing portion A side, and the side heat insulating plate 4 is a repaired portion in the carbonizing chamber 1. It is installed to block heat transfer from the furnace wall, which is a non-repair part B facing A. In the present specification, the back side heat insulating plate 3 and the side heat insulating plate 4 are collectively referred to as “heat insulating plates 3 and 4”.

  An outline of a method for inserting the heat insulating plates 3 and 4 into the carbonization chamber 1 is shown in FIG. First, a ceiling suspension guide rail 5 which is a guide device for inserting a heat insulating plate is installed on the ceiling portion of the carbonization chamber 1. The ceiling suspension guide rail 5 uses the carbonization hole 1b of the ceiling part, places the suspension frame 6 on the carbonization hole 1b, connects the suspension frame 6 and the ceiling suspension guide rail 5 with the suspension bolts 7a, The height of the ceiling suspension guide rail 5 is adjusted and fixed with the fixing nut 7b.

  On the other hand, a pair of upper guide rollers 3a and 4a arranged opposite to each other on the upper sides of the heat insulating plates 3 and 4 are installed. The upper guide rollers 3a and 4a are suspended from the ceiling suspension guide rail 5 and moved. To do. The heat insulating plates 3 and 4 are prepared in advance in the work carriage 8 outside the furnace, and the heat insulating plates 3 and 4 are inserted into the carbonization chamber 1 by transferring from the work carriage inner rail 8 a to the ceiling suspension guide rail 5. To do.

  However, the center of gravity G of the side heat shield 4 is shifted in the furnace width direction from the center line of the ceiling suspension guide rail 5 that guides the pair of upper guide rollers 4a. As a result, the side heat insulating plate 4 supported in a suspended manner by the pair of upper guide rollers 4a is inclined as shown by a solid line in FIG.

  Since the side heat shield 4 is inclined, there is a problem that the smooth transfer of the upper guide roller 4a from the work carriage inner rail 8a to the ceiling suspension guide rail 5 cannot be performed.

  Further, after the transfer to the ceiling suspension guide rail 5, the side heat insulating plate 4 is inclined in the carbonization chamber 1, so that the worker M enters the still hot carbonization chamber 1, and as shown in FIG. It was necessary to fix the inclination of the plate 4 and to fix the side heat insulating plate 4 in close contact with the furnace wall surface of the carbonizing chamber 1.

JP 56-125481 A

  The problem to be solved by the present invention is that when the side heat shield is transferred from the work carriage inner rail to the ceiling suspension guide rail, the upper guide roller cannot smoothly transfer to the ceiling suspension guide rail. . In addition, since the side heat shields are tilted after the transfer, it is necessary for the worker to enter the still hot carbonization chamber, fix the side heat shields, and fix the side heat shields to the furnace wall. It is.

The side heat insulating device at the time of hot transshipment in the coke oven carbonization chamber of the present invention,
In order to facilitate the transfer of the side heat insulating plate from the work carriage inner rail to the ceiling suspension guide rail,
A side heat insulation device used when the bricks in the coke oven carbonization chamber are transloaded hot.
For example, a side heat insulating plate configured by a plane parallel to the furnace wall surface of the non-repair portion, in which an upper guide roller is installed on the ceiling and a lower guide roller is installed on the bottom,
A ceiling suspension guide rail attached to the ceiling of the carbonization chamber to guide the upper guide roller and a lower guide rail attached to the bottom of the carbonization chamber to guide the lower guide roller;
The main feature is that it consists of

When installing the side heat insulating plate constituting the side heat insulating device of the present invention at a predetermined position in the carbonization chamber,
After attaching the ceiling suspension guide rail to the ceiling of the carbonization chamber and the lower guide rail to the bottom of the carbonization chamber,
A predetermined position in the carbonization chamber in a state where the upper side guide roller is guided to the ceiling suspension guide rail, the lower side guide roller is guided to the lower guide rail, and the side side heat insulating plate is supported at two upper and lower positions. Move up. This is the method of installing the side heat insulating plate at the time of hot transshipment in the coke oven carbonization chamber of the present invention.

  In the present invention, if the lower guide rail is configured to be widened in the furnace width direction of the carbonization chamber, the side heat shield plate can be easily fixed to the furnace wall surface.

  When the side heat insulating plate constituting the side heat insulating device of the present invention having the lower guide rail configured to be widened in the furnace width direction of the carbonizing chamber is installed at a predetermined position in the carbonizing chamber, the side heat insulating plate is set at the predetermined position. Then, the lower guide rail may be widened in the furnace width direction of the carbonization chamber, and the side heat insulating plate may be brought into close contact with the non-repair furnace wall.

  According to the present invention, the side heat insulating plate can be smoothly inserted into the carbonization chamber. Also, if the lower guide rail is configured to be widened in the furnace width direction of the carbonization chamber, it is not necessary for the worker to enter the hot carbonization chamber and to fix the side heat shield to the furnace wall surface, It is possible to shorten the installation work time of the heat insulating plate.

It is a figure explaining an example of the heat insulation apparatus of this invention. It is a figure explaining the structure (before widening) which can expand the width of a lower guide rail in the furnace width direction, (a) is a sectional view of the perpendicular direction, (b) is the figure which looked at the lower guide rail from the plane direction It is. It is a figure explaining the structure (after widening) which can expand the width | variety of a lower guide rail to a furnace width direction, (a) is sectional drawing of a perpendicular direction, (b) is the figure which looked at the lower guide rail from the plane direction (C) is an expanded sectional view of the A section of (a). It is the figure which showed the state which pushed the back | inner side heat insulating board and the side heat insulating board into the carbonization chamber. It is the figure which showed the installation state of a working scaffold, and the state which fixed the side heat insulating board with the flat bar, (a) is sectional drawing of a perpendicular direction, (b) is sectional drawing seen from the plane direction. It is a figure explaining the state which inserted and fixed the side heat shield board using the lower guide rail which does not have a widening function, (a) is a sectional view of the perpendicular direction, (b) is a sectional view seen from the plane direction is there. It is a comparison figure of the working time at the time of using the case where this invention is used, and a prior art. FIG. 8 is a diagram showing another example of a lower guide rail widening mechanism, where (a) is a diagram before widening, (b) is a diagram after widening, the upper side of the page is a plan view, and the lower side is the upper side of the page. It is AA sectional drawing of these figures. It is explanatory drawing of the broken hole which generate | occur | produced in the furnace wall of a carbonization chamber, (a) is a vertical sectional view of a furnace length direction, (b) is AA sectional drawing of (a). It is a figure explaining the installation method of the heat insulating board at the time of coke oven hot repair, (a) is sectional drawing seen from the plane direction, (b) is AA sectional drawing of (a), (c) is (a) It is BB sectional drawing of). It is a figure explaining the outline | summary of the insertion method in the carbonization chamber of a heat insulating board. It is a figure explaining the state in which a side surface heat insulating board inclines. It is a figure which shows the state which an operator enters still hot carbonization chamber, corrects the inclination of a side surface heat insulating board, and adheres and fixes a side surface heat insulating board to a furnace wall surface. It is a figure explaining the side heat insulating board which provided the rail which can move to a furnace width direction in the upper part. It is a figure explaining the state which a side surface heat insulating board moves with the rail provided in the upper part, and a clearance gap produces between a furnace wall and a side surface heat insulating plate.

  In the present invention, the purpose of facilitating the transfer of the side heat insulating plate from the work carriage inner rail to the ceiling suspension guide rail is realized by supporting the side heat insulating plate at two places, the ceiling portion and the bottom portion.

  The present invention relates to a problem that the side heat insulating plate is tilted when the side heat insulating plate is transferred from the work carriage inner rail to the ceiling suspension guide rail, and a resistance is generated between the furnace wall and the side heat insulating plate after the transfer to the ceiling suspension guide rail. This is a study for the problem of gaps.

  Hereinafter, along with the progress up to the completion of the present invention, the side heat insulating device at the time of hot transfer in the coke oven carbonizing chamber of the present invention will be described, and then the side heat insulating plate constituting the side heat insulating device is set in the carbonizing chamber. A method of installing at the position will be described.

  As shown in FIG. 14, as shown in FIG. 14, a side heat insulating plate provided with a rail 4 b that is movable in the furnace width direction of the carbonization chamber 1 is provided as a countermeasure against inclination when the side heat insulating plate 4 is transferred to the ceiling suspension guide rail 5. A method using 4 is conceivable.

  In this method, when the side heat shield 4 is transferred to the ceiling suspension guide rail 5, the side heat shield 4 can be moved directly below the ceiling suspension guide rail 5 to prevent tilting due to the center of gravity. In addition, it is considered that the side heat insulating plate 4 can be pressed against the furnace wall along the rail 4b at the installation position.

  However, the fact that the side heat insulating plate 4 is movable in the furnace width direction means that the side heat insulating plate 4 may move in the furnace width direction even if it is not desired at the same time, and is firmly attached to the furnace wall. It is difficult to let

  Even if it is temporarily possible to make the side heat insulating plate 4 closely contact with the furnace wall, if the side heat insulating plate 4 is thermally expanded after that, as shown in FIG. The side heat insulating plate 4 may move, and a gap may be generated between the furnace wall and the side heat insulating plate 4.

  Therefore, even when the method using the side heat insulating plate 4 provided with the rail 4b movable in the furnace width direction is adopted, immediately after the side heat insulating plate 4 is transferred to the ceiling suspension guide rail 5, the worker is still hot in the carbonization chamber. It is necessary to enter the inside of 1 and to fix the side heat insulating plate 4 in close contact with the furnace wall surface.

  Therefore, the inventors considered providing a lower guide roller 11b in the lower part in addition to the upper guide roller 11a provided in the upper part of the side heat insulating plate 11, as shown in FIG. On the other hand, in the carbonization chamber 1, in addition to installing the ceiling suspension guide rail 5 on the ceiling portion, a lower guide rail 12, which is a guide for inserting the side heat insulating plate 11, is attached to the lower guide rail 12 on the bottom portion. It was decided to install it so that it touched.

  If the side heat insulating device having such a configuration is used, the side heat insulating plate 11 is supported by the ceiling suspension guide rail 5, and the inclination of the side heat insulating plate 11 can be prevented by the lower guide rail 11b (see FIG. 2). ).

  At that time, as shown in FIG. 2 and FIG. 3B, it is desirable to have a structure in which the width of the lower guide rail 11b can be expanded in the furnace width direction by, for example, a parallel link mechanism. With such a configuration, if the lower guide rail 11b is widened after the side heat insulating plate 11 is pushed into a predetermined position of the carbonization chamber 1, it can be easily adhered to the furnace wall (see FIG. 3).

  Hereinafter, a method of installing the side heat insulating plate 11 using the side heat insulating device during the hot transfer of the coke oven carbonization chamber of the present invention having the above configuration will be described with reference to FIG.

  In FIG. 4, using the ceiling suspension guide rail 5 installed in the carbonization chamber 1, the rear heat insulating plate 3 is pushed into the carbonization chamber 1, and then the lower guide rail 12 is inserted and installed at the bottom of the carbonization chamber 1. Then, it is the figure which showed the state which pushed the side heat insulating board 11 into the carbonization chamber 1 after that.

  By the way, as shown in FIG.3 (c), the said side surface heat insulating board 11 is comprised with the steel support frame 11c, the gypsum board 11d, and the fiber-type heat insulating material 11e, for example. Among them, the fiber-based heat insulating material 11e is retractable, and the lower heat-resistant plate 11 and the furnace wall of the carbonizing chamber 1 can be brought into close contact with each other even by compressing the lower portion strongly with the widening of the lower guide rail 12. . As a result, the gap between the side heat insulating plate 11 and the furnace wall is almost eliminated at a predetermined position, and cold air can be prevented from entering the gap. This is the installation method of the side heat insulating plate 11 of the present invention.

  The non-repair part B in the carbonization chamber 1 has been adiabatic and cured by the above-described work, so the work is interrupted until the next day and the work environment is cooled. When the working environment is cooled, the side heat insulating plate 11 is fixed by the flat bar 14 welded and fixed to the back heat insulating plate 3 and the backstay 15 while assembling the work scaffold 13 in the carbonization chamber 1 (working environment) (FIG. 5). reference). As a result of this work, the work environment in which the repair is performed in the carbonization chamber 1 can be secured.

  By the way, when the heat load of the fixing work of the side heat insulating plate 11 performed in the furnace is small in the vicinity of the furnace opening of the carbonization chamber 1 as shown in FIGS. 2 and 3, the lower guide rail 12 is repaired. It is not necessary to provide a widening function. In this case, as shown in FIG. 6, the side heat insulating plate 11 is inserted using the lower guide rail 12 having no widening function, and the worker enters the carbonization chamber 1 and fixes the side heat insulating plate 11.

  Incidentally, FIG. 7 shows the time required for each operation when the widening of the lower guide rail is performed and when it is not performed as the operation content when the present invention is applied.

  Invention Example 1 is a case where the lower guide rail is used but the lower guide rail is not widened so that the side heat insulating plate is brought into close contact with the furnace wall of the carbonization chamber.

  Inventive Example 2 is a case where a lower guide rail having a widening function is used, and immediately after the side heat insulating plate is transferred to the ceiling hanging guide rail, the side heat insulating plate is brought into close contact with the furnace wall of the carbonization chamber and carbonized. This is a case where cooling of the furnace wall of the chamber is prevented.

  In these Invention Examples 1 and 2, it took 30 minutes to insert the lower guide rail into the carbonization chamber, which is unnecessary in the conventional example. However, since the side heat insulating plate did not tilt at the center of gravity, the transfer work of the side heat insulating plate to the ceiling suspension guide rail took 2 hours in the conventional example, but it can be completed in about half of 1.2 hours. It was.

  On the other hand, in Invention Example 1, since there is a gap between the side heat shield and the furnace wall of the carbonization chamber, it is necessary to immediately fix the side heat shield so that the furnace wall does not cool. Fixing the side heat shield plate took 3.0 hours as in the conventional method because the work efficiency was poor due to the hot work.

  On the other hand, in Invention Example 2, after the side heat shield plate is transferred to the ceiling suspension guide rail, the lower guide rail is widened (5 minutes or less), and the side heat shield plate is brought into close contact with the furnace wall to reduce the furnace wall temperature. As a result, the side heat insulating plate could be fixed on the next day (second day). On the second day, since the temperature of the work environment decreased, the fixing work of the side heat insulating plates could be completed in 1/3 of the conventional work method.

  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, the widening mechanism of the lower guide rail 12 is not limited to the one using the parallel link mechanism shown in FIGS. 2 and 3 but may be one using a spring 16 as shown in FIG. In this case, the spring 16 is contracted by the stopper 17, and when the lower guide rail 12 is widened, the stopper 17 is removed and the spring 16 is released to widen the width.

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

A Repairing part B Non-repairing part 1 Carbonization chamber 3 Back heat shield 5 Ceiling suspension guide rail 11 Side heat shield 11a Upper guide roller 11b Lower guide roller 12 Lower guide rail 16 Spring 17 Stopper

Claims (4)

A side heat insulation device used when the bricks in the coke oven carbonization chamber are transloaded hot.
A side heat insulating plate configured by a plane parallel to the furnace wall surface of the non-repaired portion, in which an upper guide member is installed on the ceiling and a lower guide member is installed on the bottom,
A ceiling suspension guide rail attached to the ceiling of the carbonization chamber to guide the upper guide member and a lower guide rail attached to the bottom of the carbonization chamber to guide the lower guide member;
A heat insulating device for a side surface at the time of hot transshipment in a coke oven carbonization chamber.   The side heat insulating device for coke oven carbonization chamber during hot transfer according to claim 1, wherein the lower guide rail is configured to be widened in the furnace width direction of the carbonization chamber. A method of installing the heat insulating device according to claim 1,
After attaching the ceiling suspension guide rail to the ceiling of the carbonization chamber and the lower guide rail to the bottom of the carbonization chamber,
The side heat shield plate is moved to a predetermined position in the carbonization chamber with the upper guide member guided to the ceiling suspension guide rail and the lower guide member guided to the lower guide rail, with the side heat shield plates supported at two upper and lower positions. A method for installing a side heat insulating plate at the time of hot transshipment in a coke oven carbonization chamber.   The said side heat insulating plate is expanded to the furnace width direction of a carbonization chamber after moving the said side heat insulating plate to a predetermined position, The said side heat insulating plate is closely_contact | adhered to a non-repair furnace wall. To install side heat shields during hot-reloading in a coke oven coking chamber.

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