JP5464075B2 - Insulation plate installation method at the time of hot transfer of ceiling bricks in coke oven carbonization chamber - Google Patents

Description

  The present invention relates to a method of installing a heat insulating plate on the ceiling of a carbonization chamber when the bricks in the coke oven carbonization chamber are disassembled hot and transshipped.

  A normal horizontal chamber furnace type coke oven (hereinafter simply referred to as “coke oven”) has a structure in which carbonization chambers and combustion chambers are alternately arranged.

  In the combustion chamber, by burning the fuel gas, heat necessary for dry distillation is indirectly transmitted to the carbonization chamber via a partition wall (also referred to as “furnace wall brick”) between the carbonization chamber and the combustion chamber. The coal charged into the carbonization chamber from the charging inlet provided at the top of the furnace is heated and distilled to the coke by the indirectly heated heat, and discharged to the outside of the carbonization chamber, while the gas generated during the carbonization is successively produced as a by-product. As recovered.

  In such a coke oven, the progress of damage in the portion in contact with the coal or coke is remarkable when the coal is charged or when the coke is discharged along with long-term operation. Therefore, it is generally widely practiced that the bricks at the bottom of the furnace wall between the carbonization chamber and the combustion chamber and the brick at the bottom of the carbonization chamber are replaced and repaired hot. On the other hand, the ceiling bricks in the carbonization chamber, which have almost no opportunity to come into contact with coal or coke, have not been damaged so much, so the transshipment repair by the ceiling brick in the carbonization chamber alone has not been performed. In the present invention, the direction in which the carbonization chambers and the combustion chambers are alternately arranged is referred to as a furnace width direction, and the direction in which coke is extruded and discharged is referred to as a furnace length direction.

  That is, conventionally, the purpose of repairing the ceiling brick and furnace top of the carbonization chamber is to prevent gas leakage from joints and cracks. Therefore, refractories are filled in the joints and cracks of the ceiling brick of the carbonization chamber, or the furnace top, which is a distribution path of the generated gas, is left over while leaving the ceiling brick of the carbonization chamber.

Among these, Patent Document 1 is disclosed as a repair method for filling a refractory into a joint break / crack of a ceiling brick of a carbonization chamber. In the method disclosed in Patent Document 1, SiCl4, which is a gas, is introduced into a carbonization chamber to react with water vapor, and the generated SiO ₂ is filled in the joints and cracks generated in the ceiling brick of the carbonization chamber. It is.

  On the other hand, Patent Document 2 is disclosed as a repair method for transshipping the furnace top. The method disclosed in Patent Document 2 prevents gas generated during coal dry distillation from flowing from the carbonization chamber to the combustion chamber or furnace through the joints and cracks generated in the ceiling bricks and furnace top of the carbonization chamber. The purpose is to do.

  That is, in the method disclosed in Patent Document 2, the generated gas is combusted from the carbonization chamber when the furnace top portion, which is the flow path of the generated gas on the ceiling brick of the carbonization chamber, is transshipped to block the flow path of the generated gas. Since it can prevent flowing into a chamber or a furnace, the top brick of the carbonization chamber is transloaded without transshipment.

  The reason why the ceiling bricks of the carbonization chamber are not transshipped is that the hot air inside the carbonization chamber (the temperature inside the carbonization chamber is high at about 1000 ° C) blows out into the work environment at the top of the furnace, avoiding the danger. It is thought to do.

  As the coke oven has been operating for years, damage to the coking chamber ceiling bricks has recently progressed, and not only joints and cracks but also defects in the coking chamber ceiling bricks have been recognized.

  By the way, since the refractory that constitutes the top of the furnace is located at the upper part of the ceiling brick of the carbonization chamber, the ceiling brick of the carbonization chamber receives the load of the refractory and is important as a structure. Have a role. In addition, a charcoal vehicle runs on the furnace top refractory, and furnace operators go back and forth.

  Therefore, the loss of the ceiling brick in the carbonization chamber threatens the safety of workers working at the top of the furnace, and needs to be repaired as soon as possible.

  In order to repair the ceiling of the carbonization chamber hot, it is necessary to protect the repair worker from the hot air generated from the carbonization chamber. As a countermeasure against hot air at the time of hot repair of a coke oven, a method of inserting and installing a heat insulating plate in a carbonization chamber has been proposed in the past for transshipment repair of a furnace wall brick that partitions the carbonization chamber and the combustion chamber. .

  For example, Patent Document 3 discloses a method in which a heat insulating plate insertion rail is inserted into a carbonization chamber, and then a heat insulating plate to be installed in a work section is inserted using the rail.

  The method disclosed in Patent Document 3 is a method of installing a heat insulating plate used when repairing a furnace wall brick. Therefore, after installing a heat insulating plate in the carbonization chamber using rails for heat insulating plate insertion and ensuring a work environment that enables furnace wall transshipment in the carbonization chamber, dismantle and transfer the carbonization chamber ceiling brick It is possible. However, in this method, only the coking chamber ceiling bricks are transshipped, but a large heat insulating plate having a height from the bottom of the coking chamber to the ceiling rail for inserting the heat insulating plate must be installed. There is a problem that the material cost of the heat insulating plate is increased and the insertion and installation work of the heat insulating plate becomes complicated. Moreover, since the rail for inserting a heat insulating plate is dangerous when used as a work scaffold for dismantling and transshipment of the coking chamber ceiling bricks, it is necessary to install a separate work scaffold.

  From the above background, it has been desired to establish a method for installing a heat insulating plate when repairing a ceiling brick in a carbonization chamber.

Japanese Patent Laid-Open No. 2001-200256 JP-A-3-210387 JP-A-9-302352

  The problem to be solved by the present invention is that at present, no proposal has been made for a method of installing a heat insulating plate when repairing a ceiling brick in a coke oven carbonization chamber.

The method of installing a heat insulating plate at the time of hot transshipment of the ceiling brick in the coke oven carbonization chamber of the present invention,
In order to be able to install a heat insulating plate on the ceiling of the carbonization chamber when repairing the ceiling brick of the coke oven carbonization chamber,
When hot repairing the carbonization chamber ceiling brick of a horizontal chamber furnace type coke oven, a method of installing a heat insulating plate on the ceiling of the carbonization chamber,
First, install a frame at the top of the furnace top where the ceiling bricks are not transshipped.
Then, by opening the furnace lid, the widening can be heat insulating plate was inserted into carbonization chamber from kiln inlet, and a hanging bolt attached to widening mechanism of the heat insulating plate to protrude from the charging hole out stringing out of the furnace Temporarily attached to the mount,
After that, the main feature is that the suspension bolt is rotated to widen the heat insulation plate in the furnace width direction of the carbonization chamber, and then the suspension bolt is permanently attached to the frame to fix the heat insulation plate.

In the said invention, in the case of transshipment repair of the ceiling brick of a carbonization chamber, the ceiling from the kiln mouth of a carbonization chamber to a transshipment repair part can be covered with a heat insulating board. At that time, it is possible to widen Runode to use capable insulating plate, covers the entire ceiling surface of the kiln inlet of the coking chamber to the transshipment repaired portion more reliably.

  In the present invention, since the heat insulating plate can be installed in close contact with the ceiling at the position beyond the transshipment repair section of the ceiling brick from the kiln opening, it is possible to prevent hot air blown out from the opening of the carbonization chamber at the time of furnace top dismantling. In addition, it is possible to safely carry out the transshipment repair between the ceiling bricks of the carbonization chamber.

(A) is an exploded perspective view for explaining an example of a heat insulating plate used in the method of the present invention, (b) is a perspective view in an assembled state, (c) a perspective view in a state in which the heat insulating plate in an assembled state is covered with a refractory coating. FIG. It is a figure explaining the state which attached the heat insulating board to the kiln entrance side ceiling part of the carbonization chamber by the method of this invention, (a) is sectional drawing of a direction orthogonal to a furnace width direction, (b) is orthogonal to a furnace length direction. It is sectional drawing of the direction to do. It is a figure explaining the state which expands the heat insulation board temporarily attached to the kiln entrance side ceiling part of the carbonization chamber by this invention method, (a) is sectional drawing of the direction orthogonal to a furnace width direction, (b) is a furnace length direction It is sectional drawing of the direction orthogonal to. It is a figure explaining the state which installation of the heat insulation board was completed in the kiln entrance side ceiling part of a carbonization chamber by the method of this invention, (a) is sectional drawing of the direction orthogonal to a furnace width direction, (b) is (a) figure. FIG. 6A is a cross-sectional view taken along the line A-A in FIG.

  In the present invention, for the purpose of installing a heat insulating plate on the ceiling of the coke oven carbonization chamber, the suspension bolt attached to the heat insulating plate inserted from the kiln outlet is spread out from the furnace top loading port where the ceiling brick is not transshipped. This was achieved by attaching it to a stand installed at the entrance.

  Hereinafter, after explaining an example of the heat insulating plate used in the method of the present invention, when using this heat insulating plate to hot repair the carbonization room ceiling brick of the horizontal chamber furnace type coke oven, the heat insulating plate on the ceiling of the carbonization chamber The method of installing will be described.

FIG. 1 is a view for explaining an example of a heat insulating plate used in the method of the present invention.
The heat insulating plate 1 used in the method of the present invention covers the ceiling Ab at a position beyond the transshipment repair portion B of the ceiling brick from the kiln opening Aa when hot repairing the ceiling brick of the carbonization chamber A. The configuration is as follows.

  The heat insulating plate 1 includes, for example, two heat insulating boards 1a and 1b having a predetermined length having a width larger than ½ of the length of the carbonization chamber A in the furnace width direction (hereinafter referred to as the furnace width), and 2 A parallel crank is formed by a plurality of links 1c of equal length connecting the heat insulating boards 1a and 1b.

  Then, the suspension bolt 2 is fixed to the central portion in the longitudinal direction of the link 1c located at the center of the link 1c, and the link 1c is rotated forward and backward by forward and reverse rotation of the suspension bolt 2, The two heat insulating boards 1a and 1b are expanded or narrowed in the furnace width direction of the carbonizing chamber A in a state where the heat insulating boards 1a and 1b are overlapped by an appropriate width.

3 is a drop-preventing fixing chain attached to the end of the heat insulating board 1a, 1b on the insertion side to the carbonization chamber A, and 9 is a handle for fixing the suspension bolt 2 to the tip of the suspension bolt 2 so that the suspension bolt 2 can be rotated forward and backward. , 11 is a refractory coating interposed between the heat insulating plate 1 and the ceiling Ab of the carbonizing chamber A.

  Fig. 2 is a diagram showing a method of installing the ceiling Ab in a position beyond the transshipment repair part B of the ceiling brick from the kiln opening Aa so as to cover the ceiling brick of the carbonization chamber A with the heat insulating plate 1 having the above-described configuration when the ceiling brick is repaired hot. This will be described with reference to FIGS.

  First, the gantry 4 is installed in the loading section Ac of the furnace top where the ceiling brick is not transshipped. The gantry 4 has two groove steels 4c and 4d arranged in parallel at a predetermined interval, for example, at the center in the longitudinal direction of the pair of groove steels 4a and 4b disposed so as to face each other. It is placed so that the webs face each other. In this case, by placing the pair of groove steels 4a and 4b on both sides in the furnace width direction of the charging inlet Ac of the carbonization chamber A, the two groove steels 4c and 4d are positioned immediately above the charging inlet Ac. It will be.

  Next, the furnace lid of the carbonizing chamber A where the ceiling bricks are transloaded is opened, and the heat insulating plate 1 to which the suspension bolt 2 is attached is inserted into the carbonizing chamber A from the kiln opening Aa.

  After the insertion, the heat insulating plate 1 is pulled up through the lifting chain 5 attached to the suspension bolt 2, and the suspension bolt 2 is rolled out of the furnace from the charging port Ac and temporarily attached to the gantry 4 with the fixing nut 6a.

  The fall prevention fixing chain 3 is also lifted up at the same time, and the ceiling brick located behind the loading inlet Ac is spun out from the furnace loading inlet Ac, which is not reloaded, and temporarily attached to the fixed base 7 with the fixing nut 6b. To do. In this example, as the fixed base 7, two groove steels 7a and 7b are placed so that the webs face each other. However, as long as the fixing chain 3 for preventing fall can be attached. Any configuration is acceptable.

  The suspension bolt 2 and the fall prevention fixing chain 3 are temporarily attached in order to facilitate the widening of the heat insulating plate 1 in the next operation.

  After the heat insulating plate 1 is temporarily attached, a temporary furnace lid 8 is attached to the kiln opening Aa to prevent cold air from entering the carbonizing chamber A, and then a handle 9 is fixed to the tip of the suspension bolt 2. Then, the suspension bolt 2 is rotated from the top of the furnace, and the heat insulating plate 1 is widened in the furnace width direction of the carbonizing chamber A.

  After the heat insulating plate 1 is expanded to the full furnace width of the carbonization chamber, first, the heat insulating plate 1 is completely fixed by tightening the fixing nut 6a of the suspension bolt 2. Next, the fall prevention fixing chain 3 is pulled strongly so as to lift the heat insulating plate 1, and is fixed with the fixing nut 6b as it is. Lastly, the holding member 10 is welded and fixed to the back stay C installed in the kiln opening Aa in order to hold the end of the heat insulating plate 1 on the kiln opening side.

  As described above, according to the method of the present invention, the heat insulating plate 1 can be installed in close contact with the ceiling Ab at a position beyond the transshipment repair part B of the ceiling brick from the kiln opening Aa. Hot air blown out from the opening of the carbonizing chamber A during dismantling can be prevented.

  In addition, the heat insulating plate 1 installed by the method of the present invention prevents the heat insulating plate 1 from dropping at three points: the suspension bolt 2, the fall prevention fixing chain 3, and the holding member 10. Therefore, the heat insulating plate 1 can be dropped. The heat insulating plate 1 can be used as a work scaffold by dismantling / reloading the ceiling bricks of the carbonization chamber A.

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

For example , when the transshipment repair part B of the ceiling brick is located behind the kiln opening Aa and there are a plurality of inlets Ac from the kiln opening Aa to the transshipment repairing part B, the fixing with the suspension bolts 2 becomes a plurality of places. Fixing by the prevention fixing chain 3 or the holding member 10 is not always necessary.

  In the above invention example, the refractory coating 11 is interposed between the heat insulating plate 1 and the ceiling Ab of the carbonizing chamber A. However, the refractory coating 11 does not necessarily have to be interposed.

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

A Carbonization chamber Aa Kiln mouth Ab Ceiling Ac Charger B Transshipment repair part C Backstay 1 Heat insulation plate 2 Suspension bolt 3 Fall prevention fixing chain 4 Mounting frame 6a, 6b Fixing nut 7 Fixed mounting table 10 Holding member

Claims (2)

When hot repairing the carbonization chamber ceiling brick of a horizontal chamber furnace type coke oven, a method of installing a heat insulating plate on the ceiling of the carbonization chamber,
First, install a frame at the top of the furnace top where the ceiling bricks are not transshipped.
Next, after opening the furnace lid and inserting a heat-insulating plate that can be widened into the carbonization chamber from the kiln opening, the suspension bolt attached to the widening mechanism of the heat-insulating plate is projected out of the furnace from the loading port. Temporarily attached to the mount,
Thereafter, the suspension bolt is rotated to widen the heat insulating plate in the furnace width direction of the carbonization chamber, and then the suspension bolt is permanently attached to the frame to fix the heat insulation plate. Insulation plate installation method during brick hot transshipment. A chain for preventing dropping is attached to the end of the heat insulating plate inserted into the carbonization chamber, the chain is squeezed out of the furnace from the inlet and fixed outside the furnace, and the end of the heat insulating plate on the kiln mouth side is fixed. The heat insulation board installation method at the time of the hot-replacement of the ceiling brick in the coke oven carbonization chamber according to claim 1, wherein the holding member to be held is fixed to a backstay installed at the kiln opening .

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