JP5034727B2 - Thermal insulation material for bricks not subject to repair during hot repair of coke oven - Google Patents

Description

  The present invention relates to a heat retaining member that retains bricks that are not to be repaired and are exposed after the bricks to be repaired are dismantled during hot repair of a chamber furnace type coke oven (hereinafter simply referred to as “coke oven”).

  A coke oven is a refractory brick structure as a whole, and generally, a carbonization chamber and a combustion chamber are alternately arranged in the horizontal direction, and a heat storage chamber is arranged below these. In the coke oven, the coal charged in the carbonization chamber is subjected to dry distillation by supplying heat accompanying the combustion of gas in the combustion chamber to produce coke. The refractory brick between the carbonization chamber and the combustion chamber adjacent to each other constitutes a furnace wall that is divided into the carbonization chamber and the combustion chamber with this as a boundary, and the carbonization chamber furnace wall brick, the combustion chamber furnace wall brick, or simply the furnace It is called a wall brick. In this specification, this brick is referred to as “furnace wall brick”. Further, the combustion chamber is partitioned into a plurality of flues as a set of two flues whose upper portions communicate with each other, and the refractory bricks that partition the flues are referred to as combustion chamber flue partition bricks or simply as flue partition bricks. In this specification, this brick is referred to as a “flue partition brick”.

  Furnace wall bricks are rapidly cooled by charging coal at approximately room temperature from being heated to a high temperature of 1000 to 1200 ° C. by supplying heat from the combustion chamber, or rubbed by extrusion of dry-distilled coke. Furthermore, the adhesion and peeling of carbon generated during dry distillation is repeated. Thereby, a furnace wall brick receives damage, such as abrasion and a crack, with a long-term operation. In the carbonization chamber having such damaged furnace wall bricks, it becomes impossible to extrude coke or normal carbonization cannot be performed, so repair such as reloading of the furnace wall bricks is required. Because the furnace wall brick is shared by the adjacent carbonization chamber and the combustion chamber, when repairing, the carbonization chamber side on both sides of the combustion chamber having the furnace wall brick to be repaired must be repaired. Dismantle the bricks and reload them with new bricks. This repair was carried out in a situation where coke production was continued in the carbonization chamber other than the carbonization chamber using the combustion chamber to be disassembled as a heat source, and combustion was continued in the flue other than the flue to be dismantled in the combustion chamber to be dismantled. Therefore, it is called hot repair.

  In hot repair, it is important that bricks that are not subjected to repair are kept as high as possible so that cracks and the like are not inadvertently caused by a temperature drop. In addition, brick replacement during hot repair is done manually in a high-temperature carbonization chamber, so it is not subject to repair for the purpose of protecting workers from harsh high-temperature environments and allowing them to work safely. It is important to block the heat dissipation from the brick and cool the brick to be repaired as much as possible. Therefore, at the time of hot repair of a coke oven, a method of installing a heat insulating member in the carbonization chamber on both sides of the combustion chamber having the brick to be repaired is employed (see, for example, Patent Documents 1 to 5).

  FIG. 1 is a horizontal cross-sectional view of a coke oven showing a heat insulating member installation structure at the time of conventional hot repair of a coke oven, in which FIG. 1 (a) shows a state before demolition of bricks, and FIG. The state after brick demolition is shown. In the coke oven shown in the figure, the bricks in the combustion chamber for two flues from the end of the coke oven on the extruder side or coke guide wheel side are to be repaired, and the third and subsequent flutes (not shown from the fourth flute) Brick is not repaired.

  As shown in the figure, the combustion chamber 1A to be dismantled by hot repair is a brick to be repaired. Furnace partition bricks 4Aa for partitioning the furnace wall bricks 3Aa, 3Aa and the flue between the furnace wall bricks 3Aa, 3Aa. Have Moreover, this combustion chamber 1A has furnace wall bricks 3Ab and 3Ab, and a flue partition brick 4Ab that partitions the flue between the furnace wall bricks 3Ab and 3Ab as bricks that are not repaired. During the hot repair, the operation is continued in the carbonization chamber 2B using the combustion chamber 1B other than the combustion chamber 1A to be disassembled as a heat supply source.

  In the hot repair of the coke oven, as shown in FIG. 1 (a), the first heat insulation panel 5 and further the 2 The heat insulation panel 6 is inserted. The first heat insulation panel 5 covers the furnace wall brick 3B of the combustion chamber 1B not to be dismantled facing the furnace wall brick 3Aa to be repaired from the ceiling portion to the hearth portion in the carbonization chamber 2A in which the first heat insulation panel 5 is inserted. Installed. The second heat insulation panel 6 is connected at right angles to the back end of the first heat insulation panel 5 in the carbonization chamber 2A into which the second heat insulation panel 6 is inserted, and the furnace wall brick 3Aa side to be repaired and the furnace wall brick 3Ab not to be repaired. It is installed so as to partition on the side.

  In Patent Document 1, a flexible heat insulating curtain is used as the first heat insulating panel 5. An I-shaped rail is installed on the ceiling of the carbonization chamber 2A by a hanging object or the like through the coal inlet, and the heat insulating curtain is inserted into the carbonization chamber 2A while being guided along the I-shaped rail and is suspended. Installed at.

  Moreover, in patent documents 2-5, the 1st heat insulation panel 5 is installed in the carbonization chamber 2A by being guided by the I-shaped rail constructed in the ceiling part of the carbonization chamber 2A, and it is installed in the suspended state. The second heat insulation panel 6 is integrated with the first heat insulation panel 5 in advance and inserted into the carbonization chamber 2A.

  Thus, in the hot repair, the first heat insulating panel 5 and the second heat insulating panel 6 make bricks that are not repaired, that is, the furnace wall brick 3B of the combustion chamber 1B that is not to be demolished, and the combustion chamber 1A that is to be demolished. Heat dissipation from the furnace wall brick 3Ab that is not subject to repair can be blocked. Accordingly, the furnace wall bricks 3B and 3Ab that are not repaired can be kept at a high temperature, and the inside of the carbonization chamber 2A surrounded by the first heat insulation panel 5, the second heat insulation panel 6, and the furnace wall brick 3Aa to be repaired. Heat can be prevented from being supplied to the work area from the furnace wall bricks 3B and 3Ab that are not repaired.

  When the installation of the first heat insulation panel 5 and the second heat insulation panel 6 is completed, as shown in FIG. 1B, the bricks to be repaired, that is, the furnace wall brick 3Aa and the flue partition brick 4Aa are sequentially disassembled from the carbonization chamber 2A side. New bricks are piled up on the traces of the demolished and demolished bricks.

JP 59-113088 A JP 56-125481 A JP-A-9-302352 JP-A-9-302353 JP-A-6-41538

  In the hot repair of the coke oven, after the bricks to be repaired, that is, the furnace wall bricks 3Aa and the flue partition bricks 4Aa are disassembled, the flue partition bricks 4Ab that are not repair targets are exposed. At this time, if the flue partition brick 4Ab that is not the repair target is exposed, the flue partition brick 4Ab and further through the end portions of the furnace wall brick 3Ab that is not the repair target connected to both ends of the flute partition brick 4Ab The heat accumulated in the flue surrounded by the flue partition brick 4Ab and the furnace wall brick 3Ab is released. Thereby, since heat is supplied to the work area in the carbonization chamber 2A, the work environment is deteriorated, and at the same time, the temperature of the flue partition brick 4Ab that is not the object of repair is lowered, so that damage such as cracks occurs. Is born.

  In the above-mentioned Patent Documents 1 to 5, the occurrence of such a problem is not considered at all, and no countermeasure is shown. Conventionally, the flue partition brick 4Ab that is not subject to repair has been dealt with by a simple method of covering it with a heat insulating curtain as disclosed in Patent Document 1.

  FIG. 2 is a vertical cross-sectional view of a coke oven showing a heat retaining structure of a flue partition brick that is exposed after brick demolition and is not repaired, and FIG. 3 is a horizontal cross-sectional view thereof. . As shown in FIGS. 2 and 3, when the brick to be repaired is dismantled and the flue partition brick 4Ab that is not a repair target is exposed, the exposed flue partition brick 4Ab is covered from the ceiling portion to the hearth portion, An insulating curtain 7 is installed. The heat insulating curtain 7 is installed in a state of being hung from a hanging object 9 provided on the ceiling portion of the combustion chamber 1A.

  However, since such a heat insulating curtain 7 has a structure in which the upper part is suspended, there is a risk of breaking due to its own weight when the thickness increases, and it has been unavoidable to make it as thin as possible. As a result, the heat insulating performance of the heat insulating curtain 7 itself was lowered, and the heat radiation from the flue partition brick 4Ab that was not repaired could not be sufficiently blocked. That is, in the heat insulating curtain 7, the flue partition brick 4Ab that is not subject to repair cannot be sufficiently warmed, and is insufficient to reliably prevent damage due to the temperature drop of the flue partition brick 4Ab.

  Here, after the bricks to be repaired are dismantled, the flute partition bricks 4Ab that are not repaired are actually cut and smoothed at both ends for joining with new bricks to be piled up here. A joining surface is formed.

  FIG. 4 is a horizontal cross-sectional view of a coke oven showing a state where a joining surface is formed on a flue partition brick that is not a repair target. As shown in the drawing, after the brick is dismantled, cutting is performed on both ends of the flue partition brick 4Ab that is not repaired, that is, on the end portion of the furnace wall brick 3Ab that is not repaired that is connected to both ends of the flue partition brick 4Ab. As a result, a joint surface 8 is formed which is recessed by one step from the exposed surface of the flue partition brick 4Ab. At that time, the heat insulating curtain 7 is temporarily raised so as not to obstruct the processing operation of the joint surface 8. Therefore, during the cutting process of the joint surface 8, the flue partition brick 4Ab that is not the object of repair is exposed, heat dissipation from the flue partition brick 4Ab is promoted, and the temperature of the flue partition brick 4Ab is lowered.

  After the processing of the joint surface 8 is finished, the heat insulating curtain 7 is again covered with the flue partition brick 4Ab. In this state, as shown in FIGS. 2 to 4, a gap C is generated between the heat insulating curtain 7 and the flue partition brick 4Ab, and heat in the gap C leaks to the work area in the carbonization chamber 2A. put out. Therefore, the heat insulation performance of the heat-insulating curtain 7 on the flue partition brick 4Ab is that heat is leaked from the gap C between the heat-insulating curtain 7 and the flue partition brick 4Ab in addition to the fact that the heat-insulating curtain 7 itself is thinned as described above. As a result, it was further insufficient.

  In addition, new bricks are piled up after the processing of the joint surface 8. Prior to the brick building, the length of the range in which the new bricks are piled up, that is, from the kiln entrance which is the trace of the demolished furnace wall brick 3Aa. The length dimension L (see FIGS. 2 and 4) up to the joint surface 8 is measured. This is to determine the dimensions of the new brick to be prepared. Also during this dimension measurement, since the heat insulating curtain 7 is temporarily lifted, the flue partition brick 4Ab that is not subject to repair is exposed, and the temperature of the flue partition brick 4Ab is lowered.

  After the dimension measurement is completed, the bricks are stacked from the hearth in the reverse order to the brick dismantling. At that time, the heat insulating curtain 7 is sequentially lifted from the lower part toward the upper part.

  As described above, with respect to the heat insulation of the non-repair flue partition brick 4Ab that is exposed after the brick to be repaired is disassembled, the heat insulating curtain 7 constituting the conventional heat insulation structure cannot itself be expected to have a sufficient heat retention performance. Since the flue partition brick 4Ab is frequently exposed between the dismantling and the stacking of new bricks, stable heat retaining performance cannot be expected. Therefore, at the time of hot repairing of the coke oven, the temperature of the flue partition brick 4Ab that is not subject to repair is inadvertently lowered, and there is still a possibility that damage such as cracks may occur in the flue partition brick 4Ab.

  The present invention has been made in view of the above-described problem, and is capable of sufficiently warming a non-repaired flue partition brick that is exposed after demolition of a repair target brick during hot repair of a coke oven. The object is to provide a member.

  In order to achieve the above-mentioned object, the present invention provides a coke oven composed of furnace wall bricks that partition alternately carbonization chambers and combustion chambers, and flue partition bricks that partition the combustion chamber into a plurality of flues. The repair target bricks that are to be repaired, including at least the furnace wall bricks among the furnace wall bricks and flue partition bricks, are dismantled from the carbonization chamber side on both sides of the combustion chamber having the bricks to be repaired, and then exposed. A heat insulating member that keeps the outer brick warm, and includes a plurality of main heat insulating plates that are detachable from each other and connected to each other in the height direction and cover the flue partition brick that is not to be repaired and is exposed after dismantling.

  With such a configuration, since the main heat insulating plate covers the flue partition brick that is not subject to repair, the heat retaining performance for the brick is improved. In addition, at the stage of dismantling the bricks to be repaired, the main thermal insulation plates can be connected and installed sequentially for each flue brick that is exposed several stages while dismantling several stages from the top. At the stacking stage, the main heat insulating plates can be removed one by one from the bottom one by one, and bricks can be stacked each time they are removed. Thermal insulation performance is stable.

  Further, from the viewpoint of further improving the heat insulation performance, a secondary heat insulating plate is rotatably connected to both ends of the main heat insulating plate, and the sub heat insulating plate is connected to both ends of the flue partition brick and is not a repair target furnace wall brick. It is preferable to cover the end.

  Furthermore, an opening is formed in the sub-insulation plate so that the dimensions for determining the dimensions of the new bricks to be stacked can be confirmed without hindering the heat retaining performance, and a heat insulating lid is attached to the opening. It is preferable.

  According to the heat retaining member of the present invention, during the hot repair of the coke oven, it is possible to sufficiently warm the non-repaired flue partition brick exposed after dismantling the repair target brick. Damage such as cracks due to the lowering can be reliably prevented.

  Hereinafter, a heat retaining member of the present invention for keeping warm a flue partition brick that is not subject to repair during hot repair of a coke oven will be described in detail with reference to the drawings.

  FIG. 5 is a horizontal cross-sectional view of a coke oven showing a heat retaining structure of a flue partition brick that is exposed after demolition of bricks and is not repaired during hot repair of the coke oven according to the present invention. FIG. 6 shows the heat retaining structure. It is a top view in the horizontal direction view of the heat retention member to do.

  Here, as shown in FIG. 1, the bricks of the combustion chamber 1A for two flues from the end of the coke oven on the extruder side or coke guide wheel side, that is, the furnace wall bricks 3Aa, 3Aa, and this furnace wall Frue partitioning brick 4Aa that partitions the flue between bricks 3Aa and 3Aa is a repair target. The brick 4Ab is illustrated as not being repaired.

  In the hot repair of a coke oven, first, as shown in FIG. 1, the carbonization chambers 2A and 2A on both sides adjacent to the combustion chamber 1A to be demolished are dismantled facing the furnace wall brick 3Aa to be repaired. A first heat insulating panel 5 that covers the furnace wall brick 3B of the combustion chamber 1B that is not the target, and further the second that partitions the inside of the carbonization chamber 2A into the furnace wall brick 3Aa that is the repair target and the furnace wall brick 3Ab that is not the repair target. The heat insulation panel 6 is inserted and installed.

  In this invention, as shown in FIG.5 and FIG.6, when installation of the 1st heat insulation panel 5 and the 2nd heat insulation panel 6 is complete | finished, the bricks to be repaired, ie, the furnace wall brick 3Aa and the flue partition brick 4Aa, are carbonized chamber 2A. The heat retaining member 10 is installed on the flue partition brick 4Ab that is dismantled sequentially from the side and is exposed together with the dismantling and is not subject to repair.

  The heat insulating member 10 of the present invention includes a plurality of main heat insulating plates 11 connected in the vertical direction, that is, in the height direction, and sub heat insulating plates 12 connected to both ends of the main heat insulating plates 11 in the horizontal direction, that is, in the left-right direction. Composed. Here, the main heat insulating plate 11 has a vertical fixture 14 fastened by bolts or the like to a fixture mounting portion 13 formed in a pair of left and right at the upper and lower portions, and the vertical connector 14 sequentially in the height direction. It is connected. The main heat insulating plates 11 can be attached to and detached from each other by attaching / detaching the upper and lower connectors 14. Such a main heat insulating plate 11 is installed as a whole so as to cover the flue partition brick 4Ab that is not repaired and that is exposed when the brick is dismantled. At this time, the uppermost main heat insulating plate 11 is fixed by fastening the upper and lower connectors 14 to a hanging object 9 (see FIG. 2) provided on the ceiling portion of the combustion chamber 1A.

  On the other hand, the sub heat insulating plate 12 is rotatably connected to the main heat insulating plate 11 by hinges 15 provided in pairs on the left and right ends of the main heat insulating plate 11. The auxiliary heat insulating plate 12 is bent with the hinge 15 as a fulcrum toward the joint surfaces 8 formed by cutting at both ends of the flue partition brick 4Ab and connected to both ends of the flue partition brick 4Ab. It is installed so as to cover the end of the brick 3Ab. At this time, the auxiliary heat insulating plate 12 has a wire 17 spanned from the fixture mounting portion 13 to the holding frame 16 of the second heat insulating panel 6, and due to the tension of the wire 17, both ends of the flue partition brick 4 </ b> Ab not to be repaired. It fixes in the state which contacted the edge part of the furnace wall brick 3Ab which is not a repair object connected to No.3. At the same time, the main heat insulating plate 11 is also fixed by the tension of the wire 17 in contact with the exposed surface of the flue partition brick 4Ab that is not subject to repair.

  Moreover, the opening part 18 is formed in the sub heat insulation board 12, and the heat insulation lid | cover 19 which consists of a heat insulation raw material is attached to this opening part 18 so that attachment or detachment is possible. As the heat insulating lid 19, in addition to a system that can be completely removed from the opening 18, a system that opens and closes the opening 18 by a slide system or a door system can be adopted.

  According to such a heat retaining member 10, the furnace wall brick 3Aa and the flue partition brick 4Aa to be repaired are sequentially disassembled from the upper stage several stages at a time, and the joining surface is exposed to the flue partition brick 4Ab that is not repaired and exposed several stages. 8 are sequentially formed, and the main heat insulating plate 11 can be sequentially connected and installed for each of several stages of the flue partition bricks 4Ab on which the joint surfaces 8 are formed, and finally the flue partition bricks 4Ab that are not repaired are exposed. The entire surface can be covered with the main heat insulating plate 11. And the sub heat insulation board 12 can be installed so that the edge part of the furnace wall brick 3Ab which is not a repair object connected to the both ends of the flue partition brick 4Ab which is not a repair object may be covered simultaneously with installation of each main heat insulation board 11. .

  In addition, at the stage of stacking new bricks, the main heat insulating plate 11 and the sub heat insulating plate 12 can be sequentially removed from the lower stage one by one, and the bricks can be stacked each time they are removed.

  Therefore, it is unlikely that the flue partition brick 4Ab is exposed between the dismantling of the brick and the stacking of a new brick, and a stable heat retaining performance for the flue partition brick 4Ab that is not a repair target can be expected. In addition, since the main heat insulating plate 11 covers the flue partition brick 4Ab that is not subject to repair without gaps, the heat retaining performance for the flue partition brick 4Ab is improved. Further, since the auxiliary heat insulating plate 12 covers the ends of the furnace wall bricks 3Ab that are not to be repaired connected to both ends of the flue partition brick 4Ab, the heat retaining performance for the flue partition brick 4Ab is further improved.

  Therefore, at the time of hot repair of the coke oven, the flue partition brick 4Ab that is not a repair target can be sufficiently kept warm. As a result, an inadvertent temperature drop of the flue partition brick 4Ab that is not subject to repair can be suppressed, and damage due to the temperature drop of the flue partition brick 4Ab can be reliably prevented. In addition, the heat supply from the flue partition brick 4Ab to the work area can be reliably cut off, and the work environment is not deteriorated.

  Moreover, when measuring the length L of the range in which new bricks are piled up, that is, the length L (see FIGS. 2 and 5) from the kiln to the joint surface 8 which is the trace of the demolished furnace wall brick 3Aa. Then, the heat insulating lid 19 is removed from the sub heat insulating plate 12, and the dimensions can be confirmed by facing the joint surface 8 from the opening 18 opened thereby. At this time, since the main heat insulating plate 11 and the sub heat insulating plate 12 need not be removed at all, the temperature of the flue partition brick 4Ab not subject to repair hardly occurs.

  In addition, the dimension in the height direction of the main heat insulating plate 11 and the sub heat insulating plate 12 may be determined according to the number of dismantling stages per one time of the furnace wall brick 3Aa and the flue partition brick 4Aa to be repaired. The number of brick dismantling stages per one is about 5, and about 600 mm is appropriate.

  The effectiveness of the heat retaining member 10 of the present invention described above has been clarified from the following examples.

  In this embodiment, during the hot repair of the coke oven, the furnace wall bricks and flue partition bricks of the combustion chamber for two flues from the end on the coke guide wheel side are repaired, and the third and later furnace wall bricks and The flue partition brick was excluded from repair.

  First, the first heat insulation panel and the second heat insulation panel are inserted into the carbonization chambers on both sides adjacent to the combustion chamber to be demolished from the respective kiln mouths, and the combustion chambers not to be demolished facing the furnace wall brick to be repaired. A first heat insulation panel was installed so as to cover the furnace wall brick, and a second heat insulation panel was installed so as to partition the furnace wall brick side to be repaired and the furnace wall brick side not to be repaired.

  Next, the furnace wall brick and the flue partition brick to be repaired were dismantled and removed from the uppermost stage of the repair range. As a result, five tiered bricks that are not subject to repair from the upper stage were exposed. Cutting was applied to both ends of the exposed flue bricks that were not repaired to form joint surfaces that were recessed one step.

  Subsequently, a main heat insulating plate is installed so as to cover the five-tiered fluted partition bricks on which the joint surfaces are formed, and the auxiliary heat insulating plates bent from both ends of the main heat insulating plate are attached to the fluted partition bricks. It was installed so as to cover the ends of non-repaired furnace wall bricks connected to both ends. At this time, the main heat insulating plate is fixed to a hanging object from the ceiling portion of the combustion chamber via the upper and lower connectors, and the sub heat insulating plate is hung from the fixing portion of the main heat insulating plate to the holding frame of the second heat insulating panel. It was fixed by the passed wire.

  Next, the furnace wall bricks and flue partition bricks to be repaired for the lower five stages were disassembled and processed with the same procedure, and the main heat insulating plate and the sub heat insulating plate were installed. At this time, the main heat insulation board was connected to the lower end of the already installed main heat insulation board via the upper and lower connection tools.

  The dismantling of the brick, the processing of the joint surface, and the installation of the main heat insulating plate and the sub heat insulating plate were repeated in five steps to the lowest step in the repair range in the same procedure.

  After the installation of the main insulation board and sub insulation board to the lowest level of the repair range, in order to determine the dimensions of the new bricks to be stacked, remove the insulation lid from the sub insulation board and face the joint surface from the opening and check the dimensions. went.

  After that, he started to stack new bricks. At the time of stacking, the bottom main heat insulating plate and the sub heat insulating plate were removed in order, and new bricks were stacked each time they were removed. Brick was piled up to the top of the repair area and hot repair of the coke oven was completed.

  In the middle of such hot repair, the heat insulation effect by the heat insulating member composed of the main heat insulating plate and the sub heat insulating plate was verified. The results are shown in Table 1.

  The heat insulation effect was verified after 24 hours had passed since the main heat insulating plate and sub heat insulating plate were installed at the ends of the flue partition brick and both side wall bricks that were not repaired, and then the surface of the flue partition brick and both side wall bricks. The measurement was performed by measuring the temperature and the surface temperature of the main heat insulating plate and the sub heat insulating plate. A contact-type thermometer was used for the measurement, and a thermometer was inserted from the gap between the main heat insulation plates and the gap between the sub heat insulation plates, and the surface temperatures of the end portions of the flue partition brick and both side wall bricks were measured. The measurement position was carried out at two places in the height direction, a total of three places: one center part of the flue partition brick and two end parts of both furnace wall bricks.

  As a comparative example, the temperature was measured for a flue partition brick that was not repaired and covered with a conventional heat insulating curtain.

In the present invention example, SS41 (rolled steel for general structure conforming to JIS standard) is adopted as a main heat insulating plate and a sub heat insulating plate, and ceramic fibers (Al ₂ O ₃ 46 to 46 are used as members and heat insulating lids attached thereto. 51% and a general one containing 49 to 54% SiO ₂ ) was employed. In the comparative example, carbon fiber was used as the heat insulating curtain.

  In the example of the present invention, the surface temperatures of the flue partition brick and the side wall bricks, which are bricks not to be repaired, are in the range of 800 to 900 ° C., and the surface temperatures of the main heat insulating plate and the sub heat insulating plate as heat insulating members are It was within the range of 20-30 degreeC. Therefore, it is clear that bricks that are not repaired can be sufficiently kept warm by the heat insulating member of the present invention.

  On the other hand, in the comparative example, the surface temperature of the brick not to be repaired was 250 to 300 ° C., and the surface temperature of the heat insulating curtain was 200 to 250 ° C. which was almost the same as the surface temperature of the brick. In other words, it is clear that the conventional heat insulating curtain is extremely inferior in the effect of keeping the bricks not to be repaired.

  According to the heat retaining member of the brick not to be repaired at the time of hot repair of the coke oven according to the present invention, the main heat insulating plate covers the flue partition brick not to be repaired, and the auxiliary heat insulating plate is connected to both ends of the flue partition brick. Since the edge part of the furnace wall brick which is not a repair object is covered, the thermal insulation performance with respect to the brick improves further. Therefore, during hot repair of the coke oven, it is possible to sufficiently keep the flue partition bricks that are not repaired, and as a result, it is possible to reliably prevent damage due to the temperature drop of the flue partition bricks and to deteriorate the working environment. There is nothing.

  In addition, at the stage of dismantling the bricks to be repaired, the main thermal insulation plates can be connected and installed sequentially for each flue brick that is exposed several stages while dismantling several stages from the top. In the stacking stage, the main heat insulating plate and the sub heat insulating plate can be sequentially removed from the lower stage one by one, and bricks can be stacked each time they are removed. Therefore, during the period from the dismantling of the bricks to the stacking of the bricks, the flue partition bricks that are not repaired are rarely exposed, and the heat retaining performance for the flue partition bricks becomes stable.

  Therefore, the present invention is extremely useful for hot repair of a coke oven.

It is the horizontal sectional view of the coke oven which shows the installation structure of the heat insulation member at the time of the conventional hot repair of a coke oven, the figure (a) shows the state before brick demolition, and the figure (b) shows after brick demolition. Indicates the state. It is a vertical cross-sectional view of a coke oven showing a heat retaining structure of a flue partition brick that is not to be repaired and is exposed after brick demolition during conventional hot repair of a coke oven. It is a horizontal sectional view of a coke oven showing a heat insulation structure of a flue partition brick which is exposed after brick demolition and is not repaired during conventional coke oven hot repair. It is a horizontal sectional view of the coke oven which shows the state in which the joint surface was formed in the flue partition bricks which are not repair objects. It is a horizontal sectional view of a coke oven which shows the heat retention structure of the flue partition brick outside the repair object exposed after brick demolition at the time of hot repair of the coke oven of the present invention. It is a top view in the horizontal direction view of the heat retention member which comprises the heat retention structure of the flue partition bricks which are not repair object exposed after brick demolition at the time of coke oven hot repair of this invention.

Explanation of symbols

1A Combustion chamber to be dismantled 2A Carbonization chamber to be dismantled 3Aa Furnace wall brick to be repaired 3Ab Furnace wall brick not to be repaired 4Aa Flue partition brick to be repaired 4Ab Flue partition brick not to be repaired 1B Combustion chamber 2B not to be dismantled Carbonization chamber 3B that is not to be dismantled Furnace wall bricks that are not to be repaired 5 First heat insulation panel 6 Second heat insulation panel 7 Heat insulation curtain 8 Joint surface 9 Hang 10 Heat insulation member 11 Main heat insulation plate 12 Sub heat insulation plate 13 Fixing fixture 14 Upper and lower connecting parts 15 Hinge 16 Holding frame 17 Wire 18 Opening 19 Thermal insulation cover

Claims (3)

In a coke oven composed of alternately placed carbonization chamber and combustion chamber bricks and flue partition bricks that divide the combustion chamber into a plurality of flues, hot wall repair and refractory bricks A brick that is to be repaired, including at least a furnace wall brick, is disassembled from the carbonization chamber sides on both sides of the combustion chamber having the brick to be repaired, and then the exposed non-repair brick is kept warm. ,
Non-repairable brick at the time of hot repair in a coke oven, comprising a plurality of main heat insulating plates that are detachable from each other and connected in the height direction, and cover a non-repairable flue partition brick exposed after dismantling Thermal insulation member.   A sub heat insulating plate is rotatably connected to both ends of the main heat insulating plate, and the sub heat insulating plate covers ends of furnace wall bricks not to be repaired connected to both ends of the flue partition brick. A heat insulating member for bricks not subject to repair at the time of hot repair of the coke oven according to 1.   The heat insulating member for bricks not to be repaired at the time of hot coke oven repair according to claim 2, wherein an opening is formed in the sub heat insulating plate, and a heat insulating lid is attached to the opening. .

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