JP2018053144A - Method for removing dust of coke oven regenerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for removing dust of a coke oven regenerator in which the removability of dust deposited on a coke oven regenerator is excellent, collapse risk is reduced while expanding the cleaning range of the regenerator, and there is no need of the whole area renewal of the coke oven.SOLUTION: Provided is a method for removing dust of a coke oven regenerator being a method of removing dust deposited on a coke oven regenerator, characterized in that the oven furnace brick of a combustion chamber located in the upper part of a regenerator as the object for removing dust is dismantled, thereafter, the partition wall of the regenerator is dismantled, and the dust deposited on the regenerator is removed.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a dust removal method for a coke oven heat storage chamber that removes dust accumulated in the heat storage chamber of a coke oven.

  The coke oven has a carbonization chamber and a combustion chamber for supplying heat to the carbonization chamber arranged alternately in the furnace width direction, and combustion air and fuel gas in the combustion chamber of the superstructure. A lower structure in which a heat storage chamber is supplied, and a corbel provided between the upper structure and the lower structure.

  The carbonization chamber and the combustion chamber disposed in the upper part of the coke oven are separated by a furnace wall of the carbonization chamber, and heat is supplied from the combustion chamber to the carbonization chamber via the furnace wall. The coal charged into the carbonization chamber is dry-distilled into coke by being heated. The combustion chamber is formed with a chamber (flue) partitioned by furnace wall bricks at predetermined intervals along the furnace length direction. The furnace wall brick facing the carbonization chamber also serves as the furnace wall of the carbonization chamber.

  The heat storage chamber formed in the lower part of the coke oven has a partition wall that is formed in the furnace length direction and functions as a structural material that supports the upper structure, an outer wall that is formed in the furnace width direction and forms a boundary with the outside, and an adjacent wall It is divided by the inner wall which makes the boundary of the heat storage chambers to perform. The heat storage chamber is filled with bricks having a large number of ventilation holes called checker bricks. The combustion air and fuel gas supplied to the combustion chamber are preheated when passing through the vent holes of the stored checker brick, and are supplied to the combustion chamber in a preheated state. Further, high-temperature exhaust gas generated by combustion of combustion air and fuel gas in the combustion chamber passes through another heat storage chamber adjacent to the heat storage chamber, and is then discharged from the chimney via the flue. When the high-temperature exhaust gas passes through the heat storage chamber, it heats the checker brick filled in the heat storage chamber to store the heat. Then, the combustion system is switched every predetermined time, heat is stored in the previously preheated room, and heat is exchanged by repeating the operation of preheating in the previously stored room.

  As the coke oven continues to operate, dust accumulates in the heat storage chamber. This dust includes fine dust such as soot, lump that is generated when the corbel provided above the heat storage chamber or the furnace wall brick in the combustion chamber deteriorates and falls due to cracks, chipping, etc. In addition, a lump of dust (dust lump) such as a lump with tar or the like attached thereto is included. When such dust accumulates in the heat storage chamber, heat exchange in the heat storage chamber is not sufficiently performed, and combustion in the combustion chamber disposed above the heat storage chamber becomes insufficient and the temperature is lowered. In particular, since the combustion chambers and heat storage chambers located at both ends of the coke oven in the furnace length direction are in contact with the outside air through the furnace wall bricks and outer walls, they are adjacent to the combustion chambers and heat storage chambers located at both ends. Combustion chambers and heat storage chambers are easily affected by outside air and can be easily cooled. On the other hand, the combustion chamber and the heat storage chamber located near the center of the coke oven are not easily affected by outside air, and are kept warm by the heat from the combustion chamber and the heat storage chamber disposed in the vicinity, so that the temperature is not easily lowered. As a result, a temperature gradient is generated between the combustion chamber or heat storage chamber adjacent to or adjacent to the length of the coke oven in the furnace length direction, and the combustion chamber or heat storage chamber located near the center of the coke oven. The temperature distribution of the coke oven becomes uneven and the operation of the coke oven becomes unstable.

  As cleaning techniques for dust accumulated in the heat storage chamber of such a coke oven, Patent Documents 1 and 2 disclose a cleaning tool or a cleaning device that removes accumulated dust from the lower hole of the heat storage chamber by suction or blowing. ing. Patent Document 3 discloses a method for preventing clogging of a coke oven heat storage chamber in which a refractory provided with a slit is placed on the bottom of a combustion chamber of a coke oven, and fixed matter generated in the combustion chamber is supplemented by the slit. ing. Patent Document 4 discloses a heat insulation method when a combustion chamber of a coke oven is transshipped hot.

Japanese Utility Model Publication No. 56-87444 JP 2000-44958 A JP 2005-325157 A Japanese Patent No. 3355014

  However, in the cleaning method using the cleaning tool or the cleaning device by suction or blowing from the lower hole of the heat storage chamber as disclosed in Patent Documents 1 and 2, the removability of dust (deposited dust) accumulated in the heat storage chamber Was not enough. That is, in the cleaning method using the cleaning tool or the cleaning device by suction or blowing from the lower hole of the heat storage chamber, the range in which the accumulated dust can be removed is limited to the range where the suction or blowing from the lower hole reaches. For this reason, it is difficult to sufficiently remove the accumulated dust on the upper part of the heat storage chamber such as the upper surface of the checker brick filled in the heat storage chamber, which is difficult to reach from the lower hole of the heat storage chamber or blown. Further, when the accumulated dust includes fixed matter generated in the combustion chamber as shown in Patent Document 3 or dust lump as described above, these are removed by suction or blowing from the lower hole. Was difficult.

  As a method for removing such accumulated dust that is difficult to remove, the outer wall that forms the boundary with the outside and the inner wall that forms the boundary between the heat storage chambers are temporarily removed, and a heat insulating method as disclosed in Patent Document 4 is performed. There are no effective countermeasures other than manual removal.

  However, the width of each heat storage chamber is small, and the range in which the outer wall and the inner wall are temporarily removed and a person can enter the heat storage chamber or reach out to clean is the heat storage chamber located at the end of the coke oven and this. It was limited to a small part of the heat storage room, such as the heat storage room adjacent to. In particular, in the coke oven similar to the Otto type, the width of the heat storage chamber is small, so that there is a problem that the range of the heat storage chamber that can be cleaned is further limited.

  In addition, the heat history of the brick wall caused by cooling the cleaning area during the cleaning operation may cause damage such as cracks, which may lead to a serious problem that the heat storage chamber collapses in the worst case. Although it is desirable to completely renew the coke oven by scrap-and-build, it is costly and involves long-term shutdown. Therefore, it is desired to establish a technique that can sufficiently remove the accumulated dust without extending the entire surface of the coke oven and prolong the life of the coke oven.

  In order to solve the above problems, the present invention is excellent in the ability to remove accumulated dust, reduces the risk of collapse while expanding the cleaning range of the coke oven heat storage chamber, and does not require the entire renewal of the coke oven. It is an object to provide a method for removing dust from a chamber.

[1] A method for removing dust accumulated in a heat storage chamber of a coke oven, wherein after disassembling the combustion chamber located above the heat storage chamber to be removed of dust, the partition wall of the heat storage chamber is disassembled. ,
A method for removing dust from a coke oven heat storage chamber, wherein dust accumulated in the heat storage chamber is removed.
[2] The coke oven heat storage chamber according to [1], wherein a temporary frame for supporting the ceiling of the heat storage chamber is installed in an opening generated by disassembling the partition wall of the heat storage chamber. Dust removal method.
[3] The method for removing dust from a coke oven heat storage chamber according to [2], wherein the temporary frame is connected and installed in the disassembly direction every time the partition wall of the heat storage chamber is disassembled.

  According to the method for removing dust from the coke oven heat storage chamber of the present invention, the deposit dust is excellently removed, and the collapse risk can be reduced while expanding the cleaning range of the coke oven heat storage chamber.

  According to the method for removing dust from the coke oven heat storage chamber of the present invention, it is possible to easily extend the life of the coke oven without renewing the entire surface of the coke oven, thereby contributing to reduction of the original unit price of coke production.

FIG. 1 is a partial cross-sectional view of a coke oven in the furnace width direction. FIG. 2 is a partial horizontal sectional view of the lower structure of the coke oven. Drawing 3 is a figure explaining one embodiment of the dust removal method of the coke oven heat storage room of the present invention. FIG. 4 is a diagram for explaining an embodiment of the temporary frame installation method of the present invention.

  Hereinafter, an embodiment of a dust removing method for a coke oven heat storage chamber of the present invention will be described with reference to the drawings.

  FIG. 1 is a partial cross-sectional view in the furnace width direction showing the structure from the upper part of the heat storage chamber 10 to the lower part of the combustion chamber 20 of the coke oven 1.

  As shown in FIG. 1, the coke oven 1 includes a superposition structure in which a carbonization chamber 30 and a combustion chamber 20 that supplies heat to the carbonization chamber 30 are alternately arranged in the furnace width direction, The upper structure combustion chamber 20 includes a lower structure in which a heat storage chamber 10 for supplying combustion air and fuel gas is formed, and a corbel 40 provided between the upper structure and the lower structure.

  FIG. 2 is a partial horizontal sectional view of the lower structure of the coke oven 1. The heat storage chamber 10 of the lower structure is partitioned by a partition wall 12 formed in the furnace length direction, an outer wall 14 formed in the furnace width direction and forming a boundary with the outside, and an inner wall 16 forming a boundary between adjacent heat storage chambers. ing. The partition wall 12 has a function as a structural material that supports the upper structure of the coke oven 1. Further, as shown in FIG. 1, the heat storage chamber 10 is filled with checker bricks 18, and heat exchange is performed between the combustion air passing through the heat storage chamber 10 through the checker bricks 18, fuel gas, and high-temperature exhaust gas. Is done. When the operation of the coke oven 1 is continued, dust D that causes the heat storage chamber to be blocked accumulates in the upper portion of the heat storage chamber 10. In this dust D, fine dust such as soot generated due to incomplete combustion of fuel gas in the combustion chamber 20 and furnace wall bricks forming the corbel 40 and the combustion chamber 20 are deteriorated and dropped due to corner chipping or the like. In addition, a lump of dust (dust lump) such as a lump formed by, for example, a lump to which tar or the like has adhered is included.

  A method for removing dust from a coke oven heat storage chamber according to an embodiment of the present invention includes a heat storage chamber selection step of selecting a heat storage chamber to be dust-removed, and a furnace wall brick of a combustion chamber located above the heat storage chamber. Dismantling furnace wall brick dismantling process, partition wall dismantling process dismantling partition wall of heat storage chamber, dust removing process of removing dust accumulated in heat storage chamber, and recovering dismantling partition wall and furnace wall brick A recovery process.

(Storage room selection process)
In the heat storage chamber selection step of selecting a heat storage chamber as a target (cleaning target) from which dust is removed, the heat storage chamber 10A to be cleaned is selected from the heat storage chamber 10 (FIG. 1). The method for selecting the heat storage chamber 10A is not particularly limited. For example, it is possible to measure the temperature distribution of the coke oven 1 and select the heat storage chamber whose temperature is lowered as the heat storage chamber 10A to be cleaned. Moreover, since the furnace wall bricks in the combustion chamber 20 are the most deteriorated among coke ovens, it is possible to disassemble and remove the deteriorated furnace wall bricks and reload the furnace wall bricks with repair bricks such as new bricks. Necessary. When reloading the furnace wall bricks in the combustion chamber 20 as described above, the heat storage chamber located below the combustion chamber 20 to be reloaded may be selected as the heat storage chamber 10A to be cleaned. By selecting the heat storage chamber 10A to be cleaned in this way, when the furnace wall bricks in the combustion chamber 20 are reloaded, the heat storage chamber located below the furnace wall bricks in the deteriorated combustion chamber 20 is disassembled. 10A accumulated dust can be removed, the combustion chamber can be repaired, and the heat storage chamber located below can be repaired and cleaned simultaneously, and the coke oven 1 can be repaired and cleaned efficiently. it can.

  The range of the heat storage chamber 10A selected as a cleaning target is not particularly limited. For example, the range may be from a heat storage chamber positioned at one end in the furnace length direction to a heat storage chamber positioned at the other end (a heat storage chamber arranged in a line in the furnace length direction). However, from the viewpoint of eliminating the uneven temperature distribution of the coke oven 1 to stabilize the operation of the coke oven 1 and restarting the operation of the coke oven 1 at an early stage, the above range is set to, for example, the furnace length. When the first heat storage chamber located at one end in the direction is the first chamber, it is preferable that the first chamber is the first chamber (1 to 10 chambers) in the other end direction (back side of the coke oven 1). It is more preferable. As described above, the non-uniformity of the temperature distribution of the coke oven 1 occurs particularly when the temperature of the combustion chambers and heat storage chambers located at both ends in the furnace length direction or the combustion chambers and heat storage chambers adjacent to these chambers is lowered. Therefore, the range of the heat storage chamber 10A to be cleaned is the above 1 to 10 chambers, preferably the above 1 to 6 chambers, and the dust D in these chambers is removed to increase the heat exchange efficiency. The uneven temperature distribution that has been present can be improved to make the temperature distribution uniform, and the operation of the coke oven 1 can be stabilized. Further, the range of the heat storage chamber 10A to be cleaned is set as the above range, and the partition wall and the combustion chamber to be dismantled when removing the dust D are minimized, so that the partition wall and the combustion after the dust removal process described later are performed. The room can be quickly restored and the operation of the coke oven 1 can be resumed early. Furthermore, the repair cost of the coke oven 1 can also be suppressed.

(Furnace wall brick dismantling process)
In the furnace wall brick dismantling process, the furnace wall brick in the combustion chamber 20 located above the heat storage chamber 10A selected as a cleaning target in the heat storage chamber selection process is dismantled. The method for dismantling the furnace wall brick in the combustion chamber 20 is not particularly limited. For example, the furnace wall brick in the combustion chamber 20 can be dismantled while performing a heat insulation method as disclosed in Patent Document 4. The furnace wall brick of the combustion chamber 20 reduces the load of the superstructure to a range where the partition wall of the heat storage chamber 10A to be cleaned can be disassembled, and minimizes the repair range of the combustion chamber 20 It is preferable to dismantle to the base of the combustion chamber 20 while leaving the roof rails and machinery. As a result, most of the upper load supported by the partition wall 12A of the heat storage chamber 10A (partition wall disassembled in the partition wall disassembly process described later) is dispersed and transmitted to the adjacent partition wall 12, so that the partition wall The upper load supported by 12A is only the brick weight of the corbel 40 positioned directly above, and the weight supported by the partition wall 12A can be temporarily reduced to about 1/10. As a result, the partition wall 12A can be disassembled without causing a bending fracture of the brick due to the overload.

  The dismantling range of the furnace wall brick of the combustion chamber 20 is a range including the furnace wall brick of the combustion chamber 20 located immediately above the heat storage chamber 10A to be cleaned. As the dismantling range of the furnace wall brick, it is assumed that the overload affects the inclination range of 45 degrees from the combustion chamber base, and the furnace wall brick of the combustion chamber on the 45 degree distribution of the partition wall 12A to be dismantled is used. It is preferable (FIG. 1, FIG. 3 (a), (b)). The 45 degrees is an angle formed by a plane including a joining line between the partition wall 12A to be disassembled and the corbel 40 and a lower surface (horizontal plane) of the corbel 40. Moreover, FIG. 1 is a figure after dismantling the furnace wall brick of the combustion chamber 20 on the 45 degree distribution before dismantling the furnace wall brick of the combustion chamber 20, and FIGS. 3 (a) and (b). The blank part on the 45 degree distribution in FIGS. 3A and 3B indicates that the furnace wall brick in the combustion chamber has been dismantled. 1 and 3 (a), it is illustrated that there is a row of combustion chambers 20 in the furnace length direction on the 45 degree distribution, and the furnace wall bricks of the combustion chambers 20 are dismantled. When there is a part or all of the other combustion chamber 20 adjacent to the combustion chamber 20 on the 45 degree distribution, it is adjacent to the combustion chamber 20 in addition to the furnace wall brick of the combustion chamber 20. A part of the other combustion chamber 20 (the range existing on the 45 degree distribution) or all the furnace wall bricks may be dismantled.

(Partition wall dismantling process)
In the partition wall disassembly step, the partition wall 12A of the heat storage chamber 10A is disassembled. Furthermore, the outer wall 14 that forms the boundary between the heat storage chamber 10A and the outside is dismantled. As described above, the partition wall 12A has a function as a structural material that supports the upper structure of the coke oven 1, but the furnace of the combustion chamber 20 located above the partition wall 12A in the furnace wall brick dismantling process. Since the upper load is reduced by dismantling the wall brick, even if the partition wall 12A is disassembled in this step, the upper load can be supported by the partition wall 12 adjacent thereto.

  Note that either the partition wall 12A or the outer wall 14 may be disassembled first. Since the outer wall 14 is easier to disassemble than the partition wall 12A, and the working space is secured by disassembling the outer wall 14, the outer wall 14 is preferably disassembled first.

  The disassembly method of the outer wall 14 is not particularly limited. For example, it can be disassembled using a tool such as a rubber hammer or a power tool such as a drill or a vibro hammer. However, when disassembling using an electric tool, the partition wall 12 and the corbel 40 that are not to be dismantled may be damaged by the impact. Therefore, it is preferable to disassemble the tool using a tool such as a rubber hammer with as little impact as possible.

  Also, the method for disassembling the partition wall 12A is not particularly limited. For example, it can be disassembled using the electric tool as described above. When disassembling the partition wall 12A, depending on the structural balance of the surroundings, the upper corbel 40 may collapse at the same time as the partition wall 12A is disassembled. It is preferable to disassemble the partition wall 12A so as not to get out of the body as much as possible under the influence of the dismantling range.

  By disassembling the partition wall 12 </ b> A and the outer wall 14, an opening is formed at the end portion in the furnace length direction of the lower structure of the coke oven 1. The opening is preferably formed by disassembling the partition wall 12A and the outer walls 14 located on both sides thereof. By forming the opening in this manner, the width of the opening can be increased. Thereby, a work space for disassembling the subsequent partition wall 12A and the inner wall 16 is secured, and further to the back side (from one end where the opening is formed in the furnace length direction to the other end). It is possible to disassemble the partition wall 12A and the inner wall 16 located. Moreover, the removal efficiency of the dust D in the below-mentioned dust removal process is remarkably improved.

  Moreover, it is preferable to install the temporary frame 50 which supports the ceiling of 10 A of thermal storage chambers in the said opening part (FIG. 3 (a)). Thereby, the ceiling of the heat storage chamber 10A can be supported, the collapse of the ceiling of the heat storage chamber 10A and the like are prevented, and the safety is improved.

  Next, the partition wall 12A and the inner wall 16 are disassembled from the opening toward the back side (from one end where the opening is formed in the furnace length direction to the other end). The disassembly method of the inner wall 16 is not particularly limited, but is preferably the same as the disassembly method of the outer wall 14. The dismantling range of the partition wall 12A is a range in which the heat storage chamber 10A to be cleaned can be cleaned. As described above, the partition wall 12A can be dismantled as described above, for example, from the heat storage chamber 10A located at the end of the coke oven 1 to the far side to disassemble the 1 to 10 heat storage chambers 10A to a cleanable range. It is preferable to disassemble the 1 to 6 heat storage chambers to a cleanable range. Further, the partition wall 12A may be disassembled from the upper surface contacting the corbel 40 to the base portion, or the disassembly may be stopped within a range where the upper portion of the heat storage chamber 10A can be cleaned.

  Moreover, it is preferable to connect and install the temporary frame 50 in the disassembly direction (back side) every time the partition wall 12A is disassembled (FIG. 3B). Thereby, the safety | security during the disassembly work | work of the partition wall 12A and the inner wall 16 located in the back | inner side, the dust removal process mentioned later, and a restoration process is improved. FIG. 3B is a partial cross-sectional view in the furnace length direction of the coke oven 1 for explaining an embodiment of the method for removing dust from the coke oven heat storage chamber of the present invention, and the blank portion of the lower structure is a partition wall 12A. , The outer wall 14 and the inner wall 16 are disassembled.

  As shown in FIG. 4A, it is preferable to use a temporary frame 50 that includes a top plate 52 and two jacks 54 that support the top plate 52. 4A is a plan view when the temporary frame 50 is viewed from the jack 54 side, and the lower figure is a cross-sectional view taken along the line XX ′ of the upper figure. . However, the jack 54 is added to the cut surface view so that the configuration of the temporary frame 50 can be easily understood. The relationship between the upper diagram and the lower diagram in FIG. 4B is the same as described above. The top plate 52 of the temporary frame 50 is flat and rectangular in plan view, and has a convex portion 52a formed at the center of one long side and a concave portion 52b formed at the center of the other long side. Yes. The convex part 52a has a shape and a size corresponding to the concave part 52b so that the convex part 52a can be fitted and connected to the concave part 52b of the other temporary frame 50, and the concave part 52b is a convex part 52a of the other temporary frame 50. The shape and the size correspond to those of the convex portions 52a. When the temporary frame 50 is connected and installed, first, the temporary frame 50 positioned on the near side (opening side) is fixed by the jack 54. Then, the convex portion 52a of the top plate 52 of the temporary frame 50 to be installed later is fitted from the back side into the concave portion 52b of the top plate 52 of the temporary frame 50 on the near side previously installed (FIGS. 4A and 4B). Thereafter, the temporary frame 50 to be installed later is fixed by the jack 54. As a result, when the temporary frame 50 is connected and installed, the temporary frame 50 on the near side and the deep side can be connected while supporting each other, and the top plate 52 may be dropped when the temporary frame 50 is connected and installed. Sexuality can be reduced. In addition, the convex part 52a may be formed in the temporary frame 50 (temporary frame 50 installed in an opening part) installed initially, and it does not need to be formed. Further, R may be provided at the corners of the convex portions 52 a of the top plate 52 of the temporary frame 50. By providing the R, when the temporary frame 50 is connected and installed, the convex portion 52a of the top plate 52 of the rear temporary frame 50 is formed in the concave portion 52b of the top plate 52 of the temporary frame 50 positioned on the near side. It becomes easy to fit. Moreover, when installing the temporary frame 50, it is preferable to arrange | position the fulcrum of the jack 54 in the cross section (disassembly surface) of the disassembled outer wall 14 and the inner wall 16. FIG. In order to improve the stability of the fulcrum of the jack 54, a plate such as an iron plate may be laid on the cross section as necessary. In addition, the temporary frame 50 preferably has a load resistance of 500 kg or more from the viewpoint of reliably supporting the upper structure.

  In this partition wall disassembling step, after disassembling one heat storage chamber 10A to be cleaned and confirming the soundness of the corbel that is the ceiling of the disassembled heat storage chamber 10A, a temporary frame 50 that supports the ceiling is installed, Furthermore, the effect of preventing collapse due to a sudden structural defect is enhanced by taking a procedure such as disassembling one room of the heat storage chamber 10A located on the back side.

(Dust removal process)
In the dust removal step, the dust D accumulated in the heat storage chamber 10A is removed. At this time, since the partition wall 12A of the heat storage chamber 10A is disassembled in the partition wall disassembly step and the work space is sufficiently secured, the worker can enter the heat storage chamber 10A and remove the dust D, and the heat storage chamber The removal efficiency of 10 A of dust D is significantly increased. For example, the dust D can be removed while visually confirming, the dust D can be reliably removed, and the removability of the dust D is enhanced. Furthermore, it is not necessary to use a large cleaning device used for cleaning the dust D from the lower hole of the heat storage chamber, and the dust D can be easily removed manually. Thereby, the removal time of the dust D can also be shortened. At this time, by installing the temporary frame 50 in the work space as described above, the effect of preventing the collapse of the upper structure is enhanced, and the safety during the dust removing process is enhanced. In addition, when removing the dust D, it is also arbitrary to use cleaning machines, such as a vacuum cleaner and a washing machine. Moreover, it is also optional to replace the checker brick filled in the heat storage chamber with a checker brick for repair such as a new one.

(Recovery process)
In the recovery process, after the dust D in the heat storage chamber 10A is removed in the dust removal process, a recovery operation is performed to recover the heat storage chamber 10A and the combustion chamber 20 located thereabove. This restoration work is the reverse of the dismantling work, that is, after the heat storage chamber 10A is restored to its original state (before dismantling), the combustion chamber 20 located above the heat storage chamber 10A is restored to the original state. When the heat storage chamber 10A is restored, the partition walls are reloaded with repair materials such as new bricks from the back side toward the near side (opening). At this time, it is preferable to remove the temporary frame 50 from the back side to the near side each time the partition walls are reloaded. For example, when the renewal of the partition walls for one heat storage chamber is completed, the temporary frame 50 supporting the ceiling for one heat storage chamber located on the near side is removed. By removing the temporary frame 50 in this way, the collapse of the ceiling and the like can be more reliably prevented until the recovery operation of the heat storage chamber is completed, and the safety of the operation is further improved.

  Further, according to the temporary frame 50 as shown in FIG. 4, even when the fixing of the jack 54 is loosened when the temporary frame 50 on the back side is removed, the convex portion of the top plate 52 of the temporary frame 50 on the back side. Since 52a is fitted in the recess 52b of the top plate 52 of the temporary frame 50 fixed to the near side, the risk of dropping the top plate 52 when the temporary frame 50 on the back side is removed is reduced. . Furthermore, R is provided at the corner of the convex portion 52a of the top plate 52 of the temporary frame 50, and the concave portion 52b of the top plate 52 of the temporary frame 50 on the near side and the convex portion 52a of the top plate 52 of the temporary frame 50 on the back side are provided. By creating a gap when fitted together, it becomes easier to remove the top plate 52 of the temporary frame 50 on the back side. Then, while the partition walls are reloaded as described above, the checker bricks are replaced and filled, and the inner wall and the outer wall are reloaded with the repair material to partition each heat storage chamber. As described above, the heat storage chamber 10A is restored and the lower structure of the coke oven 1 is restored.

  After restoring the lower structure, the combustion chamber 20 located above the heat storage chamber 10A is restored. The recovery of the combustion chamber 20 is performed by reloading the furnace wall bricks of the combustion chamber 20 with the repair material from the back side toward the front side, similarly to the recovery operation of the heat storage chamber 10A. As described above, the combustion chamber 20 is restored and the upper structure of the coke oven 1 is restored. Thereby, the coke oven 1 is restored.

  According to the dust removal method for a coke oven heat storage chamber of the present invention, after dismantling the furnace wall brick of the combustion chamber located above the heat storage chamber to be cleaned, the heat storage chamber is used to disassemble the partition wall of the heat storage chamber. It is possible to expand the cleaning range of the coke oven heat storage chamber while reducing the risk of collapse of the ceiling of the coke. Thereby, the removal efficiency of the accumulation dust of a thermal storage chamber is raised significantly. Moreover, the heat exchange efficiency is improved by sufficiently removing the accumulated dust in the heat storage chamber, the uneven temperature distribution of the coke oven caused by the low temperature is eliminated, and the operation of the coke oven is stabilized.

  Furthermore, in the opening formed by dismantling the partition wall of the heat storage chamber, by installing a temporary frame for supporting the ceiling of the heat storage chamber, during the partition wall disassembly process and during the dust removal process, Workability and safety during the recovery process are improved.

  In addition, by using a temporary frame in which a convex part and a concave part are provided on the top plate, workability and safety when connecting and removing the temporary frame can be improved.

  According to the dust removal method for the coke oven heat storage chamber of the present invention, the minimum required heat storage chamber may be selected as the heat storage chamber to be cleaned, and the range of the heat storage chamber and the combustion chamber to be dismantled is minimized. This makes it possible to easily extend the life of the coke oven without renewing the entire coke oven, thereby contributing to a reduction in the unit cost of coke production.

  When reloading the combustion chamber, the heat storage chamber located below the combustion chamber to be reloaded was selected as the heat storage chamber 10A to be cleaned. The selection range of the heat storage chamber 10A was from the heat storage chamber 10A located at the end of the coke oven 1 to the sixth chamber (1-6 rooms) from the back side. After dismantling the furnace wall brick of the combustion chamber 20 to be transshipped, the partition wall, outer wall, and inner wall were disassembled as described above. The outer wall and inner wall were disassembled using a rubber hammer, and the partition wall was disassembled using a power tool with a long handle so that the body did not protrude under the influence of the disassembly range. A temporary frame 50 was installed in an opening formed by disassembling the partition wall and the outer wall. And every time the partition wall was disassembled to the back side, the temporary frame 50 was connected to the back side and installed. The load resistance of the temporary frame 50 was set at 1000 kg with a safety factor of 2. After dismantling up to the partition wall of the sixth chamber, an operator entered the heat storage chamber 10A and removed the dust D. Finally, as described above, the disassembled heat storage chamber and combustion chamber were restored, and the coke oven 1 was restored.

DESCRIPTION OF SYMBOLS 1 Coke oven 10 Thermal storage chamber 10A Thermal storage chamber 12 to be cleaned 12 Partition wall 12A Partition wall 14 to be dismantled Outer wall 16 Inner wall 20 Combustion chamber 30 Coking chamber 40 Kobel 50 Temporary frame D Dust

Claims (3)

A method for removing dust accumulated in a heat storage chamber of a coke oven,
After dismantling the furnace wall bricks of the combustion chamber located above the heat storage chamber to remove dust, dismantle the partition wall of the heat storage chamber,
A method for removing dust from a coke oven heat storage chamber, wherein dust accumulated in the heat storage chamber is removed.   The dust in the coke oven heat storage chamber according to claim 1, wherein a temporary frame for supporting the ceiling of the heat storage chamber is installed in an opening formed by disassembling the partition wall of the heat storage chamber. Removal method.   3. The method for removing dust from a coke oven heat storage chamber according to claim 2, wherein each time the partition wall of the heat storage chamber is disassembled, the temporary frame is connected and installed in the disassembly direction.

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