JP2019077812A - Furnace body furnace-tightening structure of coke oven and construction method of coke oven - Google Patents

Abstract

To provide a furnace body furnace-tightening structure of a coke oven and a construction method of a coke oven, which have a standing position of a backstay 5 in which a cold position and a hot position coincide with each other when constructing a furnace body of the coke oven.SOLUTION: The furnace body furnace-tightening structure of the coke oven, which gives a furnace fastening force to the furnace body by a backstay 5 disposed at both ends in a furnace length direction of the furnace body of the coke oven, comprises a furnace-tightening metallic material 13 having a spring, a furnace-tightening transmission device 15 for transmitting the furnace fastening force by the furnace-tightening metallic material 13 to the furnace body, and furthermore, a plurality of detachable spacers 6. The plurality of spacers 6 are mounted on a path for transferring the furnace fastening force from the furnace-tightening transmission device 15 to the furnace body, on the side of the furnace-tightening transmission device 15. The plurality of spacers 6 are attached at a time of building a brick of the furnace body when building the furnace body of the coke oven, and the spacers 6 are removed in response to expansion of the furnace body at the time of a temperature rise when raising temperature of the furnace body.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a coke oven furnace clamping structure and a method of constructing a coke oven.

  The chamber type coke oven has a two-layer structure at the top and bottom, and a heat storage chamber is disposed in the lower layer, and a carbonization chamber and a combustion chamber are disposed in the upper layer. A serpentine section (also called a corbel section) is disposed between the upper and lower layers. The carbonization chamber is about 16 m in the furnace length direction, about 6 m in height, about 0.5 m in width in the furnace length direction, and the combustion chamber is about 0.8 m in width with the same furnace length and height, and carbonized The chambers and the combustion chambers are alternately arranged in the direction of the reactor head to form a reactor group. The heat storage chamber, the carbonization chamber, the combustion chamber, and the bellows are brick structures constructed of bricks.

  At both ends in the furnace length direction of the combustion chamber, backstays are provided for applying a furnace clamping force to the brick structure. A cross tie rod is provided at the upper and lower ends of the backstay to apply tension to press the backstay in the furnace tightening direction, and a furnace clamping force is formed by a furnace clamp spring provided at the connection between the backstay and the cross tie rod. Ru.

  A protective plate is provided at both ends in the furnace length direction of the combustion chamber, a furnace frame is provided at both ends in the furnace length direction of the carbonization chamber, and a furnace cover of the carbonization chamber is connected to the furnace frame. The furnace clamping force from the backstay works to clamp the brick structure of the combustion chamber through the protective plate.

  Regarding the method of applying the furnace clamping force from the backstay to the protection plate, the method of transmitting the furnace clamping force from the backstay to the protection plate through the furnace frame, and directly transmitting the furnace clamping force from the backstay to the protection plate The way is taken. The present invention is mainly directed to a furnace clamping structure in which the furnace clamping force from the backstay is first transmitted to the furnace frame and transmitted from the furnace frame to the protective plate.

  Patent Document 1 discloses a structure in which a bearing is installed between a protective plate and a back stay.

  With regard to the connection structure between the backstay and the protective plate or furnace frame, there is a structure in which the backstay and the protective plate or furnace frame are connected via a furnace clamp. Patent Document 2 discloses a furnace tightening structure in which a furnace clamp is disposed between a back stay and a furnace frame. The furnace clasp is an elastic structure having an elastic body such as a spring inside and compressed according to the compression force received in the furnace length direction, and in the height direction of the portion facing the combustion chamber per back stay. It has 8-10 furnace clamps. Patent Document 3 discloses a furnace closing structure in which a pressing mechanism using a spring or hydraulic fluid as a furnace clamp is disposed. Since the backstay and the furnace frame are connected via the furnace clamp, even if the distance between the backstay and the furnace frame fluctuates in the height direction, the elastic deformation of the furnace clamp absorbs the shape fluctuation. It is possible to always apply the clamping force anywhere in the height direction.

  Patent Document 4 discloses a coke oven furnace body tightening method in which a furnace clamping force is applied in the furnace length direction of the combustion chamber through a back stay, a furnace clamp, a furnace frame, and a protective plate. In FIG. 8 of the same document, as a method of applying the furnace clamping force between the backstay and the furnace frame via the furnace clamp, the support in which the non-furnace side of the furnace clamp is extended from the backstay in the direction of the furnace core There is disclosed a method of supporting the plate with a furnace and providing the furnace clamping force on the furnace side end of the furnace frame with the furnace side end of the furnace clamp. As a more preferable embodiment, in FIG. 1 of the same document, a horizontal bar (clamping transmission device) extending to both sides in the longitudinal direction of the furnace group is disposed centering on the backstay position, and both ends of the clumping transmission device Connected between the furnace transfer device and the back stay by the furnace clamp, and the furnace side of the furnace clamp is supported by the furnace transfer device, and the back side is supported by the back stay, and the furnace transfer is performed. A structure is disclosed that applies a furnace clamping force to a brick structure through the device. Patent Document 3 further describes that the furnace transfer device has a function capable of adjusting a change in the distance between the furnace frame and the back stay.

JP, 2014-210838, A JP, 2013-104048, A Japanese Utility Model Application Publication No. 55-116051 JP, 2016-113476, A

  Silica brick is used for the brick structure of the coke oven furnace body, especially for the combustion chamber. Silica stone bricks are characterized by having a small thermal expansion coefficient at 600 ° C. or higher but having a large thermal expansion coefficient from room temperature to 300 ° C. Therefore, after the brick structure of the combustion chamber is constructed at normal temperature, the combustion chamber expands in the furnace length direction in the process of raising the temperature to the operating temperature of the coke oven. Since the combustion chamber has a length of about 16 m in the furnace length direction, the expansion margin due to the temperature rise reaches about 100 mm at the end in the furnace length direction. The brick structure of the combustion chamber holds the closing force using a back stay both before and after the temperature rise. Since the combustion chamber expands largely before and after the temperature rise as described above, the standing position of the backstay at the time of brick construction (hereinafter referred to as "cold position") is the furnace body as the standing position of the backstay. It can not be made to coincide with the standing position (hereinafter referred to as "hot position") of the backstay after the temperature rise, and the standing position of the backstay moves when the furnace body is heated. Therefore, among the structures constituting the coke oven, it is necessary to adjust the construction or position of the structure connected to the backstay, for example, the dry main and the platform after the temperature rise is completed. If the standing position of the backstay can be matched between the cold position and the hot position, a structure connected to the backstay can be constructed and temperature adjustment can be completed before the temperature rise.

  The present invention relates to a coke oven furnace clamping structure and a coke oven construction method, in which the erected position of the backstay can be matched between the cold position and the hot position when building the coke oven furnace body. Intended to be provided.

That is, the place made into the summary of the present invention is as follows.
(1) A furnace clamping structure of a coke oven which applies a furnace clamping force to the furnace body by backstays disposed at both ends in the furnace length direction of the furnace body of the coke oven, and a furnace clamp having a spring, and a furnace The furnace transmission apparatus for transmitting the furnace clamping force by the clasp to the furnace body, and further having a plurality of detachable spacers, the plurality of spacers being the furnace clamping power from the furnace clamping transmission apparatus to the furnace body A coke oven furnace closing structure mounted on the side of the furnace transmission system, which is a path for transmitting
(2) There is a gap adjusting mechanism which can adjust the distance between the backstay and the furnace clamp or the distance between the furnace clamp and the furnace transfer device in the path for transferring the furnace clamping force from the backstay to the furnace clamp. The furnace furnace closing structure of the coke oven according to the above (1), characterized in that:
(3) Instead of the furnace clamping transmission device, a supporting plate extending in the direction of the core of the furnace from the backstay is provided on the furnace side of the furnace clamp, and the clamping force from the backstay is applied to the furnace clamp by the support plate. The plurality of spacers may be transmitted between the support plate and the furnace clamp, or between the furnace clamp and the furnace body, as described in (1) or (2). Coke oven furnace furnace closing structure.
(4) Using the furnace furnace clamping structure of the coke oven according to any one of the above (1) to (3), the plurality of spacers are attached at the time of brick construction of the furnace, and the furnace body is elevated A method of constructing a coke oven according to claim 1, wherein one or more of the spacers are removed in response to furnace expansion at the time of temperature rise.
(5) The standing position (hereinafter referred to as "cold position") of the backstay at the time of brick construction of the furnace body is the standing position (hereinafter referred to as "hot position") of the backstay after the furnace body is heated. The method for constructing a coke oven according to (4), characterized in that

  When building the furnace body of the coke oven using the furnace body clamping structure of the coke oven of the present invention, a plurality of spacers are attached at the time of brick construction of the furnace body, and the furnace at the time of temperature rise is installed By removing the necessary number of spacers corresponding to the body expansion, the standing position of the back stay is made to coincide with the cold position and the hot position, and either before heating, during heating, or after heating A suitable furnace clamping force can be applied to the brick structure.

BRIEF DESCRIPTION OF THE DRAWINGS It is a partial plane sectional view which shows one example of the furnace bundling structure of this invention, (A) shows when a brick structure is normal temperature and (B) shows the time of temperature rising of a brick structure having been completed. It is a fragmentary perspective view showing a furnace body clamping structure of the present invention. It is a partial plane sectional view showing one example of the furnace body clamping structure of the present invention. It is a partial side sectional view showing one example of the furnace bundling structure of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a partial plane sectional view which shows one example of the furnace bundling structure of this invention, (A) shows when a brick structure is normal temperature and (B) shows the time of temperature rising of a brick structure having been completed.

  The present invention will be described based on FIGS.

  The present invention provides a furnace furnace clamping structure of a coke oven that applies a furnace clamping force to the furnace body with backstays 5 disposed at both ends in the furnace length direction 32 of the furnace body of the coke oven, and coke using the furnace clamping structure. Target the method of constructing the furnace. 1 and 4 show the positional relationship between the backstay 5 and the brick structure 21 at one end of the furnace length direction 32. FIG. The coke oven has protection plates 7 disposed at both ends in the furnace length direction 32 of the combustion chamber 4, transmits the closing force of the backstay 5 to the protection plate 7, and protects the brick structure 21 of the combustion chamber with the protection plate 7. Hold in the furnace length direction 32. Normally, the furnace frame 6 is disposed at both ends in the furnace length direction 32 of the carbonization chamber 3 and both sides of the furnace core length direction 31 of the furnace frame 6 are in contact with the protective plate 7 of the adjacent combustion chamber 4 In the part, the protective plate 7 is located inside the furnace than the furnace frame 6.

  The clamping structure targeted by the present invention has a furnace clamp 13 incorporating a spring 14 as shown in FIGS. The furnace clamping force from the backstay 5 is transmitted to the protective plate 7 via the furnace clamp 13. The furnace clamps 13 are preferably disposed one by one on both sides of the furnace length direction 31 of the backstay 5. By incorporating the spring 14 in the furnace clamp 13, even if the distance between the back stay 5 and the furnace frame 6 slightly changes, the elastic deformation of the spring 14 in the furnace clamp 13 absorbs the shape change. It is possible to always apply the clamping force anywhere in the height direction.

  In the present invention, first, as the first embodiment, the furnace clamping transmission device 15 for transmitting the furnace clamping force by the furnace clamp 13 to the furnace body, and the furnace clamping force from the backstay 5 is the furnace clamp 13 and An embodiment will be described, which is transmitted to the furnace frame 6 via the furnace clamping transmission device 15 and further transmitted to the protective plate 7 via the furnace frame 6 (see FIG. 1). A mode is also possible in which the furnace clamping force is directly transmitted from the furnace clamping transmission device to the protective plate. Next, according to the present invention, as the second embodiment, the supporting plate 25 protruding in the direction of the length of the furnace from the back stay is provided on the back side of the furnace clamp 13 instead of using the furnace transfer device. A mode of transmitting the furnace clamping force from the backstay 5 to the furnace clamp 13 will be described (see FIG. 5). The first embodiment and the second embodiment will be described below in this order.

First Embodiment
In the furnace clamping structure of the first embodiment, as shown in FIG. 1, the horizontal bars (the furnace clamping transmission device 15) extending to both sides in the furnace length direction 31 around the backstay 5 position are arranged Both ends of the apparatus 15 connect the furnace frame 6 in a direction to press the furnace frame 6 inside, connect the furnace transfer device 15 and the back stay 5 by the furnace clamp 13, and the furnace side of the furnace clamp 13 The apparatus 15 supports the furnace side with the backstay 5 and applies the furnace clamping force from the backstay 5 to the brick structure 21 through the furnace clamp 13 and the furnace transmission device 15. That is, the furnace clamping transmission device 15 and the backstay 5 are connected by the furnace clamp 13 incorporating the spring 14, and the furnace clamping transmission device 15 is provided with a furnace clamping force from the backstay 5 via the furnace clamp 13. can do. The backstay 5 has a backstay opening 18 for allowing the hearth transfer device 15 to penetrate, and the hearth transmission 15 passes through the backstay 5 through the backstay opening 18. Both ends of the furnace transfer device 15 transmit the furnace closing force to the furnace frames 6 on both sides adjacent to the back stay 5. Alternatively, both ends of the furnace transfer device may be configured to transmit the furnace clamping force directly to the protective plate instead of the furnace frame.

  The furnace clamping structure of the present invention further includes a plurality of detachable spacers 16, and the plurality of spacers 16 are paths for transmitting the furnace clamping force from the furnace clamping transmission device 15 to the furnace body and the furnace clamping It is mounted on the side of the transmission device 15. By mounting one spacer 16, the distance between the furnace transfer device 15 and the furnace body can be increased by about 30 to 40 mm. By mounting the three spacers 16, the distance between the furnace transfer device 15 and the furnace body can be increased by about 90 to 120 mm. In the example shown in FIG. 1A, the case where three spacers 16 of a spacer 16a, a spacer 16b, and a spacer 16c are attached is illustrated.

  As described above, after building the brick structure 21 of the combustion chamber 4 at normal temperature, the combustion chamber 4 expands in the furnace length direction 32 in the process of raising the temperature to the operating temperature of the coke oven The dies 34 each reach about 100 mm at the end in the furnace length direction. FIG. 1B shows the time when the temperature rise of the combustion chamber is completed, and in contrast to FIG. 1A, the end of the brick structure 21 of the combustion chamber 4 has moved by the combustion chamber expansion margin 34. The brick structure 21 in the combustion chamber 4 has to be continuously provided with a furnace closing force using the back stay 5 before and after the temperature rise, so conventionally, the standing position of the back stay As setting the standing position (cold position) of the back stay at the time of brick construction to a position closer to the furnace side than the standing position (hot position) of the back stay after heating the furnace body, The setting position of the back stay has been moved.

  On the other hand, in the reactor clamping structure of the present invention, as described above, a plurality of spacers 16 are provided on the side of the reactor clamping transmission unit 15 which is a path for transmitting the reactor clamping force from the furnace clamping transmission device 15 to the furnace body. It can be worn. When constructing the brick structure 21, the required number of spacers 16 are attached, and the position of the backstay does not move even when the temperature is raised, and one spacer 16 is added according to the expansion of the brick structure 21. If it is removed, the position of the backstay 5 remains fixed, and it is possible to always maintain an appropriate clamping force even during temperature rise. In FIG. 1A and FIG. 2, three spacers (16a, 16b, 16c) are mounted as the spacers 16, respectively. As the expansion of the brick structure 21 in the furnace length direction 32 proceeds along with the temperature rise of the brick structure 21, one or more spacers are removed. First, the spacer 16a is removed. In FIG. 2, the spacer 16a can be removed by loosening the lock bolt 17a that fixes the spacer 16a. If further expansion proceeds, the lock bolt 17b is loosened and the spacer 16b is removed. Finally, when the last lock bolt 17 is loosened and the last spacer 16 is removed, the number of the spacers 16 to be mounted first is adjusted so that the temperature rise of the combustion chamber 4 is completed.

  In order to maintain a suitable load against thermal expansion of the brick structure 21 while the position of the backstay 5 is fixed, the furnace transfer device 15 is fixed in the furnace length direction 31 and the brick structure in the furnace length direction 32. Preferably, a guide mechanism is provided to operate along the expansion of the object 21. In FIG. 2, as one of the embodiments of the guide mechanism, the backstay 5 is provided with a guide bracket 20, the furnace clamping transmission device 15 is provided with a guide bolt 19, and along the guide hole of the guide bracket 20. The guide bolt 19 is configured to be guided.

  The furnace transfer structure of the present invention has a furnace clamp 13 incorporating a spring 14. The furnace clamp 13 can be expanded and contracted while maintaining the clamping force in the furnace length direction 32 by the expansion and contraction of the spring 14. When the length of the furnace length direction 32 is changed in the range of 40 mm, the repulsive force of the furnace clamp 13 can be set, for example, in the range of 8 to 30 kN. Accordingly, for example, when the length 32 in the furnace length direction 32 of the spacer 16 is 40 mm, the brick structure 21 expands due to the temperature rise and the length of the furnace clamp 13 becomes short to near the spring expansion margin limit of the furnace clamp 13 When one of the spacers 16 is removed, the length of the furnace clamp 13 in the furnace length direction 32 is increased, and the spring 14 is extended. Even if the spacer 16 is removed, the change in the repulsive force of the furnace clamp 13 can be in the range of 8 to 30 kN, so it is possible to keep the coercivity within a certain range even during the temperature rise of the brick structure. It is.

  As described above, since the temperature of the brick structure 21 can be raised while the position of the backstay 5 is fixed, the standing position (cold position) of the backstay 5 at the time of brick construction of the furnace body It can be made to coincide with the standing position (hot position) of the backstay 5 after the temperature rise of the furnace body. As a result, among the structures constituting the coke oven, it is possible to complete the construction and position adjustment of the structure connected to the backstay 5, for example, the dry main and the platform before the temperature rise.

  The spacers 16 included in the furnace transfer structure of the present invention are arranged in a number sufficient to absorb the expansion margin of the brick structure 21 when the temperature is raised. Therefore, it is in principle that all the removable spacers 16 have been removed when the heating of the brick structure 21 is completed and the normal operation is started. And, since the furnace transfer structure of the present invention comprises the furnace clamp 13 incorporating the spring 14, the distance between the backstay 5 and the protective plate 7 is somewhat small during the coke dry distillation operation of a conventional coke oven. When changing within the range, the expansion / contraction margin of the furnace clamp 13 changes, so that the change in distance can be absorbed while maintaining the furnace clamping force.

  The deformation of the backstay 5 in the furnace length direction 32 may be a size that can not be covered even by the expansion and contraction of the spring 14 of the furnace clamp 13. In the present embodiment, as shown in FIGS. 1 and 3, between the furnace clamp 13 and the backstay 5 (see FIG. 1), and between the furnace clamp 13 and the furnace clamping transmission device 15 (see FIG. 3). This problem can be solved by having a spacing adjustment mechanism 22 capable of adjusting the spacing between the two, either in the relationship between the hearth transfer device and the spacer. By providing such a space adjusting mechanism 22, even if deformation of the backstay 5 in the furnace length direction 32 locally occurs at a scale that exceeds the allowable lower limit of the spring length, the space is adjusted by the space adjusting mechanism 22 and the furnace is The fluctuation of clamping force can be within an acceptable range. FIG. 1 shows an example in the case where the space adjusting mechanism 22 capable of adjusting the space between the furnace clamp 13 and the backstay 5 is provided. The gap adjusting mechanism 22 has a female screw 23 and a bolt 24. By adjusting the position of the bolt 24 in the female screw 23, the gap between the furnace clamp 13 and the backstay 5 can be adjusted. FIG. 3 shows an example in the case of having a gap adjusting mechanism 22 capable of adjusting the gap between the furnace clamp 13 and the furnace transfer device 15. Of course, the furnace transfer structure of the present invention may not have the space adjustment mechanism.

Second Embodiment
In the second embodiment of the present invention, the furnace transfer device is not used, but as shown in FIG. A support plate 25 is provided, and the furnace clamping force from the backstay 5 is transmitted to the furnace clamp 13 by the support plate 25. As a result of providing the support plate 25, the intervals between the furnace clamps 13 arranged on both sides of the back stay 5 can be increased, and the furnace side end of the furnace clamp 13 is brought into direct contact with the furnace frame 6 to clamp the furnaces. Power can be transmitted.

  Also in the second embodiment, as in the first embodiment, the plurality of detachable spacers 16 are provided. The plurality of spacers 16 are paths for transferring the clamping force from the support plate 25 to the furnace body, and are mounted between the support plate 25 and the furnace clamp 13 or between the furnace clamp 13 and the furnace body Ru. In the example shown in FIG. 5A, three spacers 16 (a spacer 16a, a spacer 16b, a spacer 16c) are disposed between the support plate 25 and the furnace clamp 13. While FIG. 5 (A) shows the time when construction of the brick structure is completed at normal temperature, FIG. 5 (B) shows the time when the temperature rise of the combustion chamber is completed. In contrast to FIG. 5A, in FIG. 5B, the end of the brick structure 21 of the combustion chamber 4 is moved by the combustion chamber expansion margin 34. As the expansion of the brick structure 21 in the furnace length direction 32 progresses with the temperature rise of the brick structure 21, the position of the backstay is fixed by sequentially removing the three spacers (16a, 16b, 16c). As it is, suitable furnace clamping force can be applied to the brick structure before heating, during heating, or after heating.

Reference Signs List 2 heat storage chamber 3 carbonizing chamber 4 combustion chamber 5 backstay 6 hearth frame 7 protective plate 8 cross tie rod 9 hearth clamping spring 13 hearth clamp 14 spring 15 hearth clamping transmission device 16 spacer 17 lock bolt 18 backstay opening 19 guide bolt Reference Signs List 20 bracket for guide 21 brick structure 22 interval adjusting mechanism 23 female screw portion 24 bolt 25 support plate 31 furnace length direction 32 furnace length direction 33 height direction 34 combustion chamber expansion margin

Claims (5)

A coke oven furnace clamping structure in which a furnace clamping force is applied to the furnace body by backstays disposed at both ends in the furnace length direction of the coke oven furnace body, the furnace clamping material having a spring and the furnace clamping material A furnace transmission system for transmitting a furnace clamping force to the furnace body, and further having a plurality of detachable spacers;
The coke oven furnace clamping structure is characterized in that the plurality of spacers are a path for transmitting the furnace clamping force from the furnace clamping transmission device to the furnace body and is mounted on the side of the furnace clamping transmission device.   The path for transmitting the furnace clamping force from the backstay to the furnace clamp has a space adjusting mechanism capable of adjusting the distance between the backstay and the furnace clamp or the space between the furnace clamp and the furnace clamping transmission device. The furnace furnace closing structure of the coke oven according to claim 1, characterized in that In place of the furnace clamping transmission device, a supporting plate is provided on the back side of the furnace clamp, extending from the backstay in the direction of the length of the furnace, and the furnace clamping force from the backstay is transmitted to the furnace clamp by the support plate.
The coke oven according to claim 1 or 2, wherein the plurality of spacers are mounted between the support plate and the furnace clamp or between the furnace clamp and the furnace body. Furnace body tightening structure.   A plurality of spacers are attached at the time of brick construction of the furnace body using the furnace body closing structure of the coke oven according to any one of claims 1 to 3, and the temperature rise of the furnace body is raised. A method of constructing a coke oven, comprising removing one or more of the spacers in response to furnace expansion during warm temperatures.   The standing position (hereinafter referred to as "cold position") of the backstay at the time of brick construction of the furnace body is made to coincide with the standing position (hereinafter referred to as "hot position") of the backstay after the furnace body is heated. The method for constructing a coke oven according to claim 4, wherein the method comprises:

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