JP6794979B2 - How to fix the furnace lid of the coke oven carbonization chamber and its drying hole lid - Google Patents

Description

The present invention relates to the furnace lids provided on the extruder side and the coke discharge side of the carbonization chamber of the coke oven, and has been developed in particular to prevent gas leakage from the drying holes provided in the furnace lid for drying the furnace body brick. The present invention relates to a method of fixing a furnace lid of a coke oven carbonization chamber and a drying hole lid thereof.

The carbonization chamber of the coke oven is provided with a furnace lid for closing the kiln opening on the extruder side and the coke discharge side. Generally, in a coke oven, coal as a raw material is charged into a carbonization chamber with the furnace lid closed, and the combustion heat generated in a combustion chamber provided adjacent to the carbonization chamber is used (heat transfer). This is a furnace in which coal in the carbonization chamber is carbonized to make coke. The coke after carbonization in the coke oven is then extruded from the outlet side of the carbonization chamber with the furnace lid open.

When constructing a new coke oven or replacing a deteriorated coke oven, the core brick of the new coke oven must be dried prior to operation. As a method for this, there is a method in which the temperature in the carbonization chamber is raised by utilizing the heat of the exhaust gas of the gas burner from the drying hole provided attached to the furnace lid, thereby evaporating the water content in the brick. That is, in order to dry the furnace body brick in the carbonization chamber, it is necessary to attach a gas burner for drying to the furnace lid. Generally, the furnace lid does not have a part for attaching a gas burner for drying, and there is no flow path for exhausting the exhaust gas of the gas burner for drying. Therefore, a drying hole penetrating from the hardware of the furnace lid body to the caster block It is considered necessary.

In general, the airtightness inside the coke oven is determined by the knife edge that abuts on the outer surface of the furnace frame provided on the outside of the carbonization chamber kiln, the seal plate fixed inside the knife edge, and the slide plate on the outside of the seal plate. The furnace lid is held by pressing it against the furnace frame side by the reaction force of the spring (see Patent Document 1). However, in order to attach the gas burner for drying to the furnace lid, it was necessary to make holes in the seal plate and the slide plate as well.

Japanese Unexamined Patent Publication No. 2001-288472

As described above, it is necessary to make holes for drying in the furnace lid, the seal plate, and the slide plate in order to dry the furnace body bricks that are carried out during the construction of a new furnace or the deterioration and renewal work. However, in this case, when the furnace lid is attached to the kiln opening, there is a problem that a gap is inevitably generated between the seal plate around the drying hole and the slide plate. The gap between the seal plate and the slide plate leads to a decrease in airtightness in the furnace at the kiln opening, and it was necessary to solve this. The decrease in airtightness of the carbonization chamber due to the above gap is not a problem when the furnace body is dried, but after the furnace body is newly installed (renewed), the coal charged in the carbonization chamber is carbonized using the same furnace lid. In the case of producing coke, it was not possible to prevent it by simply covering the drying holes, which caused the gas generated in the furnace to leak during operation.

Moreover, gas leakage from the coke oven causes deformation of the furnace body hardware and accelerates deterioration of the furnace body when this gas is ignited. Therefore, leakage of gas generated in the furnace must be prevented. In addition, when the drying holes of the furnace lid with drying holes are covered and used for normal operation, if the furnace lid with drying holes and the furnace lid without drying holes are mixed and used for a long period of time, parts with or without drying holes will be used. Each has a different lifespan. Further, from the viewpoint of cost, a structure is required in which ordinary common parts without drying holes can be applied to a furnace lid having drying holes. In particular, since the seal plate is replaced more frequently than other parts, when replacing a seal plate with dry holes with a normal seal plate without dry holes, even if the other parts have dry holes. There was a need for a furnace lid with a structure that would not cause any problems.

However, the conventional technology has not studied the countermeasures against gas leakage from the gap caused by newly providing the drying holes and the structure considering the long-term use of the furnace lid provided with the drying holes. , It was necessary to solve these problems.

An object of the present invention is a furnace lid of a coke oven carbonization chamber capable of maintaining the original airtightness of the furnace lid and reliably preventing gas leakage even in a furnace lid having a drying hole, preferably a part having a drying hole but not a component. It is intended to provide a method for fixing a furnace lid of a coke oven carbonization chamber and a drying hole lid thereof, which can be replaced with a coke oven lid.

As a result of diligent research to solve the above-mentioned problems of the prior art and to realize the above-mentioned purpose, the inventors have come to develop a new coke oven carbonization chamber lid described below. .. That is, in the present invention, the furnace lid metal fitting, the slide plate, the seal plate, and the caster block are provided through the furnace lid in which the slide plate, the seal plate, and the caster block are provided in this order on the carbonization chamber side of the furnace lid metal fitting. A furnace lid having a structure in which the dried holes are closed with a drying hole lid, a flange plate is arranged between the seal plate and the caster block around the drying holes, and the slide plate and the seal plate are separated. It is a furnace lid of a coke furnace carbonization chamber, which is characterized in that a drying hole lid is fixed to a flange plate by sandwiching it.

In addition, in the furnace lid of the coke oven carbonization chamber according to the present invention configured as described above,
(1) The dry hole lid was fastened to the tap hole of the flange plate via the drill hole of the slide plate and the drill hole of the seal plate, and the seal plate was fixed between the slide plate and the flange plate.
(2) By forming a concave-shaped portion in which the flange plate is housed in the caster block provided with the drying hole and arranging the flange plate in the concave-shaped portion, the surface of the caster block and the surface of the flange plate are flush with each other. What was configured to be
(3) The number of drilled holes on the same circumference as the drilled holes of the drying hole lid is doubled, and the sliding plate is provided with drilling holes and tap holes alternately, and the seal plate having the drying holes is provided with drilling holes on the slide plate. The tap hole was placed at the position corresponding to the drill hole, and the tap hole was placed on the flange plate at the position corresponding to the drill hole provided on the slide plate.
Is considered to be a more preferable solution.

Further, the method for fixing the drying hole lid of the furnace lid according to the present invention is to provide a drying hole around the drying hole when fixing the drying hole lid, slide plate, seal plate and flange plate according to (3) above. When fixing the seal plate to be held, the lid fixing bolt is fastened to the tap hole of the flange plate through the drilled hole of the drying hole lid, the drilled hole of the slide plate, and the drilled hole of the seal plate to fix the drying lid. The fixing of the seal plate having no drying hole is characterized in that the lid fixing bolt is fastened to the tap hole of the slide plate through the drilled hole of the drying hole lid to fix the drying lid.

According to the present invention, by sandwiching and fixing the seal plate between the slide plate and the flange plate around the drying hole, the gap between the seal plate and the slide plate that has been generated in the drying hole portion is eliminated. be able to. As a result, even when the drying holes are provided, the original airtightness of the furnace lid that can be exhibited when the drying holes are not provided can be maintained, so that the leakage of the gas generated in the furnace from the drying holes is eliminated and the coke oven. The life can be extended. Further, even if the flange plate is provided, it is possible to reduce the cost of replacing the parts by making the common parts such as a seal plate not provided with the drying holes applicable.

It is a figure for demonstrating an example of the conventionally known coke oven to which this invention is applied. (A) to (c) are partial cross-sectional views for explaining the furnace lid of the coke oven carbonization chamber of the present invention in comparison with the conventional furnace lid, respectively. (A) to (d) are diagrams for explaining the configuration of each member when applying common parts in the furnace lid of the coke oven carbonization chamber of the present invention, respectively. (A) and (b) are diagrams for explaining an example of a method of fixing each member when applying common parts in the furnace lid of the coke oven carbonization chamber of the present invention, respectively. (A) and (b) are diagrams for explaining another example of a method of fixing each member when applying common parts in the furnace lid of the coke oven carbonization chamber of the present invention, respectively.

<About the coke oven to which the present invention is applied>
FIG. 1 is a diagram for explaining an example of a conventionally known coke oven to which the present invention is applied. In the example shown in FIG. 1, the coke oven 1 is a structure (furnace) in which a carbonization chamber 2 for charging coal and a combustion chamber 3 for heating the carbonization chamber 2 are alternately arranged. In the carbonization chamber 2, coke is produced by steaming (dry distillation) the coal charged from the upper charging hole (not shown). The produced coke is taken out from the carbonization chamber 2 by opening the furnace lid 4 detachably provided at the kiln opening at the end in the front-rear direction of the carbonization chamber 2 and extruding it in the horizontal direction by an extrusion ram (not shown).

A heat storage chamber 5 is integrally provided in the lower part of the combustion chamber 3, and the combustion chamber 3 and the heat storage chamber 5 burn the fuel gas 6 with the air 13 and discharge it to the outside of the coke oven 1 as the combustion exhaust gas 7. By doing so, the adjacent combustion chamber 2 is heated to a temperature at which coal is carbonized. The coke oven 1 having the above configuration has a high coal processing capacity, good thermal efficiency, and can obtain coke with high strength.

In the coke oven 1 having the configuration shown in FIG. 1, as shown in FIG. 1, the combustion chamber 3 and the heat storage chamber 5 are divided into a partition wall 12 on the combustion side and the withdrawal side in the length direction. As shown by the arrow in FIG. 1, the fuel gas 6 and the burned combustion gas are divided into two parts by (combustion side of heat storage chamber 5) → (combustion side of combustion chamber 3) → (withdrawal of combustion chamber 3). The side) → (the withdrawal side of the heat storage chamber 5) is circulated, and the adjacent combustion chamber 2 is heated to a temperature for drying coal, for example, about 1100 ° C. Then, when this state is continued for about 20 to 30 minutes, the gas flow is reversed to switch between combustion and exhaust, and the combustion side and the withdrawal side are exchanged and heating is repeated.

<About the structure of the furnace lid of the present invention>
2 (a) to 2 (c) are partial cross-sectional views for explaining the furnace lid of the coke oven carbonization chamber of the present invention in comparison with the conventional furnace lid, respectively.

FIG. 2A is a diagram showing an example of a furnace lid having a conventional drying hole structure. In the example shown in FIG. 2A, 21 is a drying hole, 22 is a drying hole lid for closing the drying hole 21, 23 is a lid fixing bolt for fastening the drying hole lid 22, and 24 is a seal having a drying hole 21. A plate, 25 is a slide plate having a drying hole 21, 26 is a furnace lid main body hardware, and 28 is a caster block having a drying hole 21. In the example shown in FIG. 2A, the caster block 28 and the seal plate 24 are arranged around the drying holes 21 in an overlapping state in which the drying holes 21 are overlapped. Then, the lid fixing bolt 23 is fastened to the tap hole of the slide plate 25 through the drill hole provided in the drying hole lid 22, and the drying hole 21 is closed by the drying hole lid 22.

In the furnace lid having the conventional drying hole structure shown in FIG. 2A, the seal plate 24 is arranged between the slide plate 25 and the caster block 28. The slide plate 25 and the caster block 28 are not fastened with the lid fixing bolt 23. Therefore, the gas generated in the carbonization chamber passes through the gap between the seal plate 24 and the slide plate 25 as shown by the gas flow 30, and has a structure that easily leaks to the outside.

FIG. 2B is a diagram showing an example of a furnace lid having a drying hole structure of the present invention. In the example shown in FIG. 2B, the difference from the example shown in FIG. 2A is that the flange plate 27 is provided between the slide plate 25 and the caster block 28 around the drying hole 21. .. Then, the drying hole 21 is dried by fastening the lid fixing bolt 23 to the tap hole of the flange plate 27 via the drill holes provided in each of the drying hole lid 22, the slide plate 25, and the seal plate 24. It is closed with a hole lid 22. In the example shown in FIG. 2B, since the seal plate 24 is closely fixed between the slide plate 25 and the flange plate 27, gas leakage from the carbonization chamber to the outside can be suppressed.

In the furnace lid having the drying hole structure of the present invention shown in FIG. 2B, the seal plate 24 is arranged between the slide plate 25 and the flange plate 27, and the slide plate 25 and the flange plate 27 are fixed to each other. It is fastened by a bolt 23. Therefore, as in the conventional example shown in FIG. 2A, the gas flow 30 through the gap between the seal plate 24 and the slide plate 25 can be eliminated.

FIG. 2C is a diagram showing another example of the furnace lid having the drying hole structure of the present invention. In the example shown in FIG. 2C, the difference from the example shown in FIG. 2B is that a concave shaped portion 28a in which the flange plate 27 is accommodated is formed in the caster block 28 provided with the drying hole 21, and the flange plate is formed. By arranging 27 in the concave shape portion 28a, the surface of the caster block 28 and the surface of the flange plate are configured to be flush with each other. In the furnace lid having the drying hole structure of the present invention shown in FIG. 2C, it is possible to eliminate gas leakage through the gap between the seal plate 24 and the slide plate 25, as in the example shown in FIG. 2B. In addition, the seal plate 24, the flange plate 27, and the caster block 28 can be brought into close contact with each other better than the example shown in FIG. 2B, and the seal plate 24 can be prevented from being deformed, resulting in higher airtightness. can do.

In FIG. 2, it is not necessary that the caster block 28 and the seal plate 24 or the caster block 28 and the flange plate 27 are in close contact with each other. This is because the gas diffused through the gap between the caster block 28 and the seal plate 24 or the caster block 28 and the flange plate 27 is sealed by the knife edge portion arranged on the outside of the caster block 28.

<Example of applying common parts in the present invention>
3 (a) to (d), 4 (a) and 4 (b) and 5 (a) and 5 (b) are the furnaces having drying holes in the lid of the coke oven carbonization chamber of the present invention, respectively. It is a figure for demonstrating the method at the time of applying the common parts to the lid and the furnace lid which does not have a drying hole.

In this example, the common component is a seal plate 24 having no drying holes. Since the furnace lid having a drying hole is used only when the coke oven is started up, the drying hole is not used in the steady operation after the start-up is completed. Therefore, when it becomes necessary to replace the seal plate having a drying hole installed in the furnace lid having a drying hole, it is preferable to replace it with the seal plate having no drying hole used for the furnace lid having no drying hole. .. According to the method shown in FIGS. 3 to 5, the seal plate can be replaced with the seal plate 24 having no drying hole 21 without changing the structure of the furnace lid having the drying hole.

In the examples shown in FIGS. 3 (a) to 3 (d), as shown in FIG. 3 (a), n holes (here, 6 holes) are formed in the drying hole lid 22 at the same angle on the circumference. An example of the case is shown. FIG. 3B shows the periphery of the drying hole 21 of the slide plate 25. In this example, drill holes 25a and tap holes 25b are alternately provided at 2n locations (12 locations in this case) that are doubled on the same circumference as the drill holes 22a of the drying hole lid 22. FIG. 3C shows the periphery of the drying hole 21 of the seal plate 24. In this example, drill holes 24a are provided at n locations (6 locations in this case) corresponding to the drill holes of the slide plate. FIG. 3D shows the periphery of the drying hole 21 of the flange plate 27. In this example, tap holes 27b are provided at n locations (6 locations in this case) corresponding to the drill holes of the slide plate on the same circumference as the drill holes 22a of the drying hole lid 22.

4 (a) and 4 (b) and 5 (a) and 5 (b) show a seal plate 24 having a drying hole 21 and a seal plate 24 as a common member having no drying hole 21. It is a figure for demonstrating the method of exchanging the dry hole lid 22, the slide plate 25, and the flange plate 27 of the structure shown in each of (a) to (d) without changing. In this example, in each case, six lid fixing bolts 23, which are the same as the number of drilled holes in the dry hole lid 22, are used to fix the dry hole lid 22.

In the examples shown in FIGS. 4A and 4B, an example of fixing the seal plate 24 having the drying holes 21 is shown. In the example shown in FIG. 4B, the cross section of the drying hole lid 22 shown in FIG. 4A along the line AA (the direction of the line AA coincides with the width direction of the furnace lid). ), And the long lid fixing bolt 23a is tapped on the flange plate 27 through the drill hole 22a of the drying hole lid 22, the drill hole 25a provided in the slide plate 25, and the drill hole 24a provided in the seal plate 24. It is fastened to the hole 27b. Here, the long lid fixing bolt 23a indicates a lid fixing bolt that reaches the tap hole 27b of the flange plate 27.

In the examples shown in FIGS. 5A and 5B, an example of fixing the seal plate 24 having no drying holes 21 is shown. The example shown in FIG. 5B is a case where the cross section of the drying hole lid 22 shown in FIG. 5A along the BB line (the direction of the BB line coincides with the width direction of the furnace lid). ) Is shown, and a short lid fixing bolt 23b is fastened to the tap hole 25b of the slide plate 25 via the drilled hole 22a of the drying hole lid 22. Here, the short lid fixing bolt 23b indicates a lid fixing bolt that reaches the tap hole 25b of the slide plate 25. In FIG. 5, since it is not necessary to use the flange plate for fixing the drying hole lid, the flange plate may be removed. Further, if necessary, the caster block may be replaced with one without the concave shape portion 28a or one without the drying hole 21.

As described above, by rotating the drying hole lid 22 by 360 / 2n degrees (here, 30 degrees) from the mounting position of the drying hole lid 22 shown in FIGS. 4 (a) and 4 (b), FIG. 5 ( The mounting position of the drying hole lid 22 shown in a) and (b) can be achieved. According to this example, the common seal plate 24 can be applied to both the furnace lid having the drying holes 21 and the furnace lid not having the drying holes 21.

21 Drying hole 22 Drying hole Lid 22a, 24a, 25a Drill hole 23 Lid fixing bolt 23a Long lid fixing bolt 23b Short lid fixing bolt 24 Seal plate 25 Slide plate 25b, 27b Tap hole 26 Furnace lid body hardware 27 Flange plate 28 Caster block 28a Concave shape part 30 Gas flow

Claims (5)

A drying hole provided through the furnace lid metal fitting, the slide plate, the seal plate, and the caster block is provided in the furnace lid in which the slide plate, the seal plate, and the caster block are provided in this order on the carbonization chamber side of the furnace lid metal fitting. A furnace lid having a structure of being closed with a dry hole lid.
A flange plate is placed around the drying hole between the seal plate and the caster block, and the drying hole lid is placed so that the seal plate is in close contact between the slide plate and the flange plate with the slide plate and the seal plate in between. The lid of the coking chamber, which is characterized by fixing the lid to the flange plate with bolts for fixing the lid. A claim characterized in that a dry hole lid is fastened to a tap hole of a flange plate via a drilled hole of a slide plate and a drilled hole of a seal plate, and the seal plate is fixed between the slide plate and the flange plate. Item 2. The lid of the coke oven carbonization chamber according to Item 1. A concave shape portion for accommodating the flange plate is formed in the caster block provided with the drying hole, and the flange plate is arranged in the concave shape portion so that the surface of the caster block and the surface of the flange plate are flush with each other. The lid of the coke oven carbonization chamber according to claim 1 or 2. Double the number of drill holes on the same circumference as the drill holes of the dry hole lid, alternately drill holes and tap holes on the slide plate, drill holes on the seal plate with dry holes, and drill holes provided on the slide plate. The coke oven carbonization according to any one of claims 1 to 3, wherein the tap holes are arranged at the positions corresponding to the drill holes provided on the slide plate on the flange plate. The furnace lid of the room. In fixing the drying hole lid, slide plate, seal plate and flange plate according to claim 4, around the drying hole.
When fixing a seal plate with a drying hole, the lid fixing bolt is fastened to the tap hole of the flange plate through the drilled hole of the drying hole lid, the drilled hole of the slide plate, and the drilled hole of the seal plate to fix the drying lid. And at the same time
The fixing of the seal plate having no drying hole is characterized in that the lid fixing bolt is fastened to the tap hole of the slide plate through the drilled hole of the drying hole lid to fix the drying lid. How to fix the hole lid.

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