JP3027935B2 - Ceiling brick support method during coke oven hot repair - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of supporting a ceiling brick in a non-repaired portion during hot repair of a furnace wall of a coke oven in a coke oven.

[0002]

2. Description of the Related Art In a coke oven furnace, a heat storage chamber is provided at a lower portion of a furnace body, and a combustion chamber and a carbonization chamber divided into a large number of flue by a partition are arranged at an upper portion thereof. Fuel gas and air (in the case of rich gas, only air) are preheated in the heat storage chamber, burned in the combustion flues, recovered in the adjacent heat storage chamber via the deburring flues, and then passed through the flue. Is discharged. Charcoal charged into the coking chamber is
It is carbonized by indirect heating from the combustion chamber through the furnace wall to form coke.

[0003] The coke oven furnace is mainly made of silica bricks, and is constructed of clay bricks, heat insulating bricks and red bricks.
Exposed to the high temperature of ℃, wet coal at normal temperature is charged and cooled, friction and side pressure due to the extrusion of carbonized coke, carbon adhesion generated during dry distillation and its separation, etc.
The operation is repeated under severe conditions. For this reason, the furnace wall bricks in the coking chamber have been cut, damaged,
Cracks, squaring, dropouts, etc. occur. Therefore, in a coke oven, the condition of damage to the furnace wall bricks is regularly inspected, and the damaged furnace wall bricks are partially repaired by hot brick transfer.

[0004] In the hot transshipment of the damaged furnace wall brick, for example, in the case of replacing the furnace wall brick from the kiln mouth to two flue, in order to prevent a temperature drop after three flue from the kiln mouth, two or more flues are required. After installing a heat retaining burner with a blocking member between Flue and 3 Flue, burning Flue after 3 Flue from the kiln opening, and closing the opening of the gas port and air port of 2 Flue from the kiln with brick,
A heat insulator is placed to prevent the temperature of the heat storage chamber from dropping. Next, in order to secure a working environment, first, a heat insulating member is installed on the ceiling portion of the carbonization chamber in order to prevent a decrease in the temperature of the ceiling portion of the carbonization chamber.

[0005] The installation of a heat insulating member on the ceiling of the carbonization chamber is shown in FIG.
2. As shown in FIG. 13, a heat insulating member 124 having a fixing bolt 123 made of an iron plate 121 and a heat insulating material 122 is attached to a chain 126 lowered from a coal opening 125 by the heat insulating member 12.
Four fixing bolts 123 on the rear side are connected and inserted into the carbonization chamber 127, and a wire 129 passed through a pulley 128 installed at the upper part of the furnace mouth is connected to the kiln side of the heat insulating member 124. Next, after the heat insulating member 124 is lifted to the ceiling of the carbonization chamber 127 by the chain 126 and the wire 129, the pedestal 13 for fixing the heat insulating member on the ceiling prepared on the furnace is prepared.
The fixing bolt 123 is fixed at 0 with a tightening nut 131. Next, as shown in FIG. 14, a back side heat insulating material 132 is installed in a carbonization chamber 127 between two flues and three flues from the kiln mouth, and the furnace wall bricks 134 on both sides on the opposite side to the old furnace wall brick 133 to be dismantled. The covering side heat insulating material 135 is installed, and finally the heat insulating material is laid on the furnace bottom of the coking chamber, and the preparation for dismantling the old furnace wall brick 133 and the old partition wall brick 136 is completed.

For dismantling of the furnace wall bricks, the old furnace wall bricks in the upper part of the transfer part are dismantled in two or three stages, the non-replacement part furnace top brick holder is carried in from the dismantled gap, and the hanging through the inspection hole of Flue is carried out. After fixing with a rod to a mounting stand for fixing the heat insulating member of the ceiling with a fastening nut, the old furnace wall brick and the old partition wall brick to be transshipped in the carbonization chamber are dismantled to the furnace bottom.

When the dismantling of the old furnace wall brick and the old partition wall brick is completed, the new furnace wall brick and the new partition wall brick are sequentially stacked, and the relocated new furnace wall brick and the new partition wall brick leave the upper two or three steps. Then, the tightening nut was loosened to lower the hanging rod, and the furnace-top brick holder was removed from the untransferred gap, and FIG.
As shown in FIG. 1, the ceiling portion 111 of the non-transferred furnace top brick, the newly refurbished new furnace wall brick 112 and the new bulkhead brick 1
The supporting rafters 114 are inserted between the support members 13 to support them. The rafters 114 supporting the ceiling 111 are replaced with ones having different dimensions in accordance with the progress of the brickwork, and the brickwork is continued. When the brickwork at the top is completed, the bricks at the top and the ceiling 111 are replaced. Insulation material is inserted between them and a wooden wedge is driven in to complete the transfer.

[0008] When the transfer is completed, a temporary furnace cover is attached to the kiln opening, and the temperature of the transferred brick is started. The temperature of the transfer bricks is increased from the temperature at the time when the new furnace wall bricks and the new partition wall bricks are completed (for example, 100 ° C.) to the temperature (1000 ° C.) necessary for normal operation of the furnace wall bricks (silica bricks). Care is taken to prevent the occurrence of cracks due to rapid thermal expansion in consideration of the characteristics. In particular, 2 with a large coefficient of thermal expansion
During the period from 00 to 400 ° C, the temperature is controlled and raised at a rate of 30 to 40 ° C / Day. In this case, the ceiling heat insulating member, the rear heat insulating material, the side heat insulating material, and the bottom heat insulating material of the carbonization chamber are removed by removing the temporary furnace lid when the temperature is raised to a predetermined temperature, and then the furnace lid is mounted. The heat insulating material laid on the bottom of the flue and the bricks whose gas and air ports are closed are taken out from the free inspection holes using a jig when the temperature is raised to a predetermined temperature. Eventually, the wooden wedges are burned out according to the temperature rise and expansion of the furnace wall bricks, and the mortar is sprayed on the wooden wedges, and then the operation is returned to the operation.

The method and apparatus for holding a non-transferred furnace top brick include a suspending member having an upper end supported above the furnace, a frame suspended and supported by the suspending member, and a vertical A first brick holding member which is built in a posture and is pivotally supported so as to swing from the above posture to a horizontal posture when holding a brickwork, and a second brick holding member which is detachably fixed to the frame. A device constituted by a second brick holding member (Japanese Patent Publication No. 45-38133), as shown in FIG.
A small beam 102 is provided in the row direction of the combustion chamber of the coke oven.
02 is fixed at the position where it intersects with the girder 101,
02, a suspension bolt 10
An opening for 3 is provided, the upper part of the carbonization chamber furnace wall having a height corresponding to the lower part of the ceiling brick is partially dismantled, a ceiling brick receiving member 104 is inserted, and the metal member 104 and the small beam 102 are inspected by Flue. The hanging bolt 103 and the fastening nut 10
Support structure to support ceiling bricks by binding at 6
As shown in FIG. 9, when supporting a ceiling portion 91 of a wall structure to be dismantled and repaired, a support beam 92 is erected around a wall structure of a non-repaired portion in a furnace group direction as a fulcrum. A hanging bolt 93 is hung from the 92 to lift and support the lower surface of the ceiling portion 91 of the repaired portion.
Is a helical spring 95 inserted under the tightening nut 94.
(See Japanese Patent Laid-Open Publication No.
No. 49451).

[0010]

SUMMARY OF THE INVENTION The above Japanese Patent Publication No. 45-38.
No. 133 discloses a holding device that holds a top brick in a partition wall direction before a brick is dismantled by a first brick holding member, and holds a top brick in a furnace wall direction by a second brick holding member. At the stage where the new brickwork leaves the upper two or three stages of the furnace wall, after removing the second brick holding member, complete the new brickwork,
Thereafter, the first brick holding member is built in the vertical position and is pulled out from the inspection hole. Therefore, this holding device
Even after removing the second brick holding member, the first brick holding member holds the top brick in the direction of the partition wall, but the top brick in the direction of the furnace wall is not held. I am concerned.

In the supporting structure disclosed in Japanese Utility Model Publication No. Sho 61-26342 and Japanese Patent Laid-Open Publication No. Hei 6-49451, the ceiling bricks are placed at the stage where the new brickwork leaves two or three steps above the furnace wall. After removing the ceiling, the rafters for support are inserted between the ceiling part of the non-transferred part and the newly refurbished new furnace wall brick and new bulkhead brick to support them. Shortly after insertion, the upper ceiling often drops off from loose brick joints,
This is a very dangerous operation for the worker removing the ceiling suspension plate. Also, from the construction side, if the brickwork is finished with the joint of the ceiling brick loosened, gas leakage will occur from the joint when returning to operation after repair, and sufficient repair effect will not be obtained. In some cases, the ceiling must be repaired.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned disadvantages of the prior art, and even when a ceiling suspension plate for supporting a ceiling portion, which is a non-transshipment portion, is removed, the ceiling portion can be safely replaced with a brick without falling off. It is an object of the present invention to provide a method of supporting a ceiling brick at the time of hot repair of a coke oven in which a rafter can be inserted therebetween and a joint of a ceiling portion can be prevented from being loosened.

[0013]

SUMMARY OF THE INVENTION According to the present invention, when supporting the ceiling of an old furnace wall brick whose volume is changed during hot repair of a coke oven, a supporting beam is supported by using a wall structure of a non-repair portion in the direction of the furnace group as a fulcrum. Horizontally, suspending bolts are suspended from the supporting beams through the inspection holes of flue, and the ceiling is lifted and supported by a suspension plate having a lifting surface furnace direction as a slit,
At the final stage of brick-laying, a flat bar is inserted into the slit of the lifting surface of the suspension plate, and both ends are welded and connected to the ceiling heat insulating members of both carbonized chambers via the connection flat bar to support the ceiling portion, and then the The hanging plate is removed, and a rafter is inserted between the new bricks that have been transshipped and the lower surface of the ceiling portion that is not supported by the flat bar to support the ceiling portion and remove the flat bar. In this way, by lifting and supporting the ceiling portion with a suspension plate having a slit shape in the lifting surface furnace group direction, prior to removing the suspension plate by brickwork in the final stage, a slit in the lifting surface of the suspension plate is provided. If a flat bar is inserted and both ends are welded and connected to the ceiling heat insulating members of both carbonized chambers via a connecting flat bar to support the ceiling part, the suspension plate supporting the ceiling part, which is the non-transfer part, is removed. Even in this case, the rafter can be safely inserted between the ceiling portion and the new brick without relocation, and the joint of the ceiling portion can be prevented from loosening.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The lifting surface of the suspension plate used in the present invention has a slit shape in the direction of the furnace. The flat bar is inserted into the slit in the direction of the furnace before the removal of the suspension plate in the final stage of brickwork. It is to insert and insert both ends by welding and connecting to the ceiling insulation member of both sides carbonization room via the connecting flat bar to support the lower surface of the ceiling. The ceiling part cannot be supported by welding connection via the connection flat bar. In addition, since the flat bar is inserted and both ends are welded and connected to the ceiling heat insulating members of both carbonized chambers via the connection flat bar to support the ceiling portion, the suspension plate can be lowered and easily removed. In addition, a gap is formed between the flat bar inserted into the slit and a gap between the ceiling part and the new brick to be inserted, which is sufficient to insert and support the rafter. For this reason, the thickness of the suspension plate is set in consideration of the thickness of the flat bar so that the flat bar can slide on the slit portion. The slit position of the suspension plate in the furnace group direction is designed in accordance with the brickwork so that rafters can be inserted into individual furnace wall bricks and partition wall brick positions on the ceiling portion.

Since the hanging plate of the present invention has a slit shape in the direction of the lifting surface furnace, radial ribs are provided on the opposite side of the lifting surface, that is, from the center of the lower surface to the four corners, and the hanging rod penetrates the center of the lower surface. It has a through hole. In order to support the ceiling with the suspension plate, penetrate the through hole of the support beam on the furnace, drop the suspension rod from the inspection hole of Flue, dismantle the upper part of the old furnace wall brick to be dismantled in two or three steps, and A lifting plate with a slit in the direction of the lifting surface furnace is carried in from the gap, a lifting rod is passed through the through hole of the lifting plate, a cotter is fixed to the lower part, and the upper end of the lifting rod is supported on the support beam by adjusting the tightening bolt. Adjust force to support.

After that, the old furnace wall brick and the old partition wall brick to be dismantled by a conventionally known method are dismantled to the furnace bottom, and then the new furnace wall brick and the new partition wall brick are stacked, and the new furnace wall brick and the new partition wall brick are disassembled. At the stage where the upper two or three stages are left, a flat bar is inserted into the slit of the suspension plate in the direction of the furnace group, and both ends are welded to the ceiling insulation members on both sides of the carbonization chamber via the connecting flat bar. Connect to support the lower surface of the ceiling. To remove the hanging plate, loosen the fastening bolts of the hanging bar, lower the hanging plate, remove the hanging plate together with the cotter from the hanging bar, and remove it from the upper two or three-stage gap where the furnace wall brick is left unstacked. Also, remove the hanging rod and tightening bolt.

At the stage where the suspension plate is removed, the ceiling portion is supported by the ceiling heat insulating members of the carbonization chambers on both sides via the flat bar and the connecting flat bar, so that the joint of the ceiling portion is not loosened. No ceiling bricks fall. Next, rafters are inserted through the flat bar and the connecting flat bar between the ceiling part supported by the ceiling heat insulating members of the carbonization chambers on both sides and the new furnace wall brick and the new partition wall brick. Thereafter, the welds between the flat bar and the connection flat bar are cut, and the flat bar and the connection flat bar are removed.

After removing the flat bar and the connecting flat bar, the brickwork is continued while replacing the rafter supporting the ceiling part with a different size in accordance with the progress of the brickwork, as in the prior art. Upon completion of the upper brickwork, a wooden wedge is driven into the uppermost brick and the ceiling with a heat insulating material interposed therebetween to complete the transshipment.

[0019]

【Example】

Embodiment 1 Hereinafter, details of a method for supporting a ceiling brick during hot repair of a coke oven according to the present invention will be described with reference to FIGS. 1 to 8 showing an embodiment. FIG. 1 is a bottom perspective view of a suspension plate of a ceiling portion used in the present invention, FIG. 2 is a perspective view of a flat bar inserted into a slit of the suspension plate, and FIG. 3 is a state in which the ceiling portion is supported by the suspension plate of the present invention. FIG. 4 is an explanatory view in a furnace length direction in a state in which a flat bar is inserted into a slit of a suspension plate, a connection flat bar is welded, and the flat bar is fixed to a ceiling heat-insulating member of both carbonization chambers. FIG. 5 is an explanatory view as viewed from the lower part of the suspension plate in FIG. 4, FIG. 6 is an explanatory view in the furnace length direction with the suspension plate removed, and FIG. 7 is a rafter between the ceiling part, the new furnace wall brick and the new bulkhead brick. 8 is an explanatory view in the furnace length direction in a state of being inserted, and FIG. 8 is an explanatory view seen from the lower part of FIG.

For example, when the furnace wall bricks from the kiln opening to the 2 flue are transshipped, first, in order to prevent the temperature drop after the 3 kiu from the kiln opening, a closing member is provided between 2 flew and 3 flew from the kiln opening. Install a heat retention burner, burn 3 flu from the kiln mouth, burn 2 flu from the kiln mouth, close the gas and air port openings with bricks, place the heat insulating material on the heat storage chamber. Prevent temperature drop. Thereafter, as described above, a heat insulating material is applied to the ceiling part of the carbonization chamber, the rear side of the carbonization chamber, and the side furnace wall brick opposite to the furnace wall brick to be transferred, and the heat insulating material is laid on the bottom of the furnace, and then the transfer furnace wall brick is transferred. Is supported by the method of the present invention. Thereafter, the furnace wall bricks are dismantled and transshipped.

1 to 8, reference numeral 1 denotes a suspension plate for a ceiling portion used in the present invention. The suspension plate has a plurality of slits 3 in which a flat bar 2 can slide in the direction of a furnace on the suspension surface. 4 has a through hole 5 therethrough, and ribs 6 are provided radially toward four corners. As shown in FIG. 3, the ceiling plate 7 is supported by the suspension plate 1 by suspending the suspension rod 4 from the through hole of the support beam 8 installed on the furnace through the inspection hole 9 of the flue and dismantling the old furnace wall. The upper two or three stages of the brick 11 are dismantled, the hanging plate 1 is carried in from the gap, the hanging rod 4 is passed through the through hole 5, the cotter 12 is attached to the lower part of the hanging rod 4, and the tightening nut 13 is mounted. And the ceiling portion 7 is supported by the suspension plate 1.

Thereafter, the old furnace wall bricks 11 and the old partition wall bricks 14 to be dismantled are dismantled to the furnace bottom, and then the new furnace wall bricks 15 and the new partition wall bricks 16 are stacked from the furnace bottom as in the conventional case. At the stage where the new furnace wall brick 15 and the new bulkhead brick 16 leave the upper two or three steps, as shown in FIGS. 4 and 5, the flat bars 2 are inserted into the slits 3 of the suspension plate 1 and Flat bar 17 for connection at both ends of 2
Is welded and fixed, and the other end is welded and fixed to the iron plate 18 of the ceiling heat insulating member 10 of the carbonization chamber 20 composed of the iron plate 18 and the heat insulating material 19, and the ceiling portion 7 is connected via the flat bars 2 and the connecting flat bar 17. To be supported by the ceiling heat insulating member 10.

Then, the hanging nut 4 is lowered by adjusting the tightening nut 13, and the cotter 12 and the hanging plate 1 are removed and removed from the remaining upper or lower two-stage or three-stage gap to obtain the state shown in FIG. . Next, as shown in FIGS. 7 and 8, the new furnace wall brick 15, the new partition wall brick 16, and the ceiling portion 7.
The rafter 21 is inserted between the bricks, and the ceiling 7 is supported by the rafter 21 for each brick. When the insertion of the rafters 21 is completed, the welded portions of the flat bars 2 and the connecting flat bars 17 and the welded portions of the connecting flat bars 17 and the iron plate 18 of the ceiling heat insulating member 10 are cut, and the flat bars 2 and the connecting portions are cut. The flat bar 17 is removed.

The new furnace wall brick 15 and the new partition wall brick 1
In the brickwork operation of No. 6, the brickwork is continued by removing one rafter 21 and stacking one brick, and replacing the rafters 21 with different sizes according to the progress of the brickwork. When the uppermost brick is completed, the wooden wedge is repeatedly driven into the uppermost brick and the ceiling with a heat insulating material interposed therebetween, thereby completing the transfer of the new partition wall brick 16 and the new furnace wall brick 15. In addition, 22 is a fixing bolt of the ceiling heat insulating member 10, 23 is a coal port, and 24 is a fastening nut of the fixing bolt 22.

With the above construction, at the stage where the hanging plate 1 is removed, the ceiling portion 7 is supported by the ceiling heat-insulating member via each flat bar 2 and the connecting flat bar 17, so that the ceiling portion 7 does not fall off, and the danger of bricks falling off can be avoided. Further, loosening of the joint of the ceiling portion 7 is also prevented, and gas leakage after returning to operation can be prevented. In this manner, the ceiling portion 7 is supported by the ceiling insulation member via the flat bars 2 and the connecting flat bars 17, and the rafters 21 are provided between the new furnace wall brick 15 and the new partition wall brick 16 and the ceiling portion 7 for each brick. After the insertion of each flat bar 2 and the connecting flat bar 17
Is cut off, and each brick of the ceiling portion is supported by rafters 21. Then, as in the conventional case, one rafter 21 is removed and one brick is stacked. While replacing with the rafters 21, the brickwork is continued, and when the topmost brickwork is completed, the wooden wedge is repeatedly driven into the new bulkhead brick 16 by interposing a heat insulating material between the topmost brick and the ceiling. The transfer of the new furnace wall brick 15 is completed.

[0026]

According to the method for supporting a ceiling brick of the present invention,
At the stage where only the upper two or three stages of the coke oven hot transfer are left, the flat bar prevents the falling of the ceiling part when removing the ceiling suspension plate supporting the ceiling part before work Safety can be ensured, and joints at the ceiling can be prevented from being loosened, and gas leakage and the like after completion of transshipment repair can be prevented.

[Brief description of the drawings]

FIG. 1 is a bottom perspective view of a suspension plate of a ceiling portion used in the present invention.

FIG. 2 is a perspective view of a flat bar inserted into a slit of a suspension plate.

FIG. 3 is an explanatory view in a furnace length direction in a state where a ceiling portion is supported by a suspension plate of the present invention.

FIG. 4 is an explanatory view in a furnace length direction of a state in which a flat bar is inserted into a slit of a suspension plate, and a connecting flat bar is welded and fixed to a ceiling heat insulating member of both carbonization chambers.

FIG. 5 is an explanatory view as viewed from the lower part of the suspension plate of FIG. 4;

FIG. 6 is an explanatory view in a furnace length direction with a hanging plate removed.

FIG. 7 is an explanatory view in a furnace length direction in which rafters are inserted between a ceiling portion, a new furnace wall brick, and a partition wall brick.

FIG. 8 is an explanatory view of the rafter portion of FIG. 7 as viewed from below.

9A and 9B show a method of supporting a ceiling brick disclosed in Japanese Patent Application Laid-Open No. 6-49451, in which FIG. 9A is a schematic cross-sectional view showing the entire supporting method, and FIG. It is.

FIG. 10 shows a conventional method of supporting a ceiling brick,
(A) is a schematic sectional view showing the entire supporting method, and (b) is a bottom perspective view of the ceiling suspension plate.

FIG. 11 is an explanatory view in a furnace length direction in which rafters are inserted between a conventional ceiling part, a new furnace wall brick, and a partition wall brick.

FIG. 12 is a schematic partially cutaway perspective view for explaining a conventional method of installing a heat insulating member on a ceiling portion of a carbonization chamber.

FIG. 13 is a schematic cross-sectional view showing a state in which a heat insulating member is installed on a ceiling portion of a conventional carbonization chamber.

FIG. 14 is a schematic horizontal cross-sectional view showing a heat insulating material installation state at the time of conventional hot brick transfer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Suspension board 2 Flat bar 3 Slit 4 Hanging rod 5 Through hole 6 Rib 7, 91, 111 Ceiling part 8, 92 Support beam 9, 105 Inspection hole 10 Ceiling heat insulating member 11, 133 Old furnace wall brick 12 Cotter 13, 24, 94, 106, 131 Tightening nut 14, 136 Old partition brick 15, 112 New furnace wall brick 16, 113 New partition brick 17 Connecting flat bar 18, 121 Iron plate 19, 122 Insulation material 20, 127 Carbonized room 21, 114 Rafter 22 , 123 Fixing bolt 23, 125 Charging port 93, 103 Hanging bolt 95 Spiral spring 101 Large beam 102 Small beam 104 Ceiling brick receiver 124 Insulation member 126 Chain 128 Pulley 129 Wire 130 Mount 132 Backside insulation material 134 Furnace wall brick 135 Side surface Insulation

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-49451 (JP, A) JP-A-6-212158 (JP, A) Fully open sho 59-37345 (JP, U) Really open sho 61- 125146 (JP, U) JP-B-45-38133 (JP, B1) JP-B-49-37801 (JP, B1) (58) Fields investigated (Int. Cl. ⁷ , DB name) C10B 29/06

Claims (1)

(57) [Claims] When supporting a ceiling portion of a furnace wall brick whose volume is changed during hot repair of a coke oven, a support beam is horizontally suspended around a wall structure of a non-repair portion in a furnace group direction and suspended from the support beam. The ceiling part is lifted and supported by a hanging plate with a slit shape in the direction of the furnace group, and a flat bar is inserted into the slit on the lifting surface of the hanging plate at the final stage of the reloading brick, and both ends are placed on both sides. The ceiling part is welded and connected to the ceiling insulation member of the carbonization chamber via a connection flat bar to support the ceiling part, and after removing the hanging plate, a rafter is inserted between the transfer furnace wall and the ceiling part lower surface not supported by the flat bar. A method of supporting a ceiling brick during hot repair of a coke oven, wherein the flat bar is removed by inserting the flat bar into the ceiling.