JP6253946B2 - Carbon adhesion suppressing device and coke oven equipped with the same - Google Patents

Description

  The present invention relates to a carbon adhesion suppressing device that suppresses carbon from adhering to a vent pipe of a coke oven and a coke oven equipped with the same.

  The gas generated when carbonizing coal in a coke oven is led to a riser pipe provided at the upper part of the carbonization chamber, cooled by aqueous water sprayed by a vent pipe, and then sucked into a gas collecting main pipe, followed by a post-process. Sent to the gas purification process. At that time, carbon in the gas adheres to the inner wall of the vent pipe and grows. The adhering carbon not only hinders gas flow but also eventually closes the inside of the pipe, so that periodic removal work is required.

  In order to suppress carbon from adhering to the vent pipe, it is known that a water spray nozzle is provided to sprinkle water into the vent pipe, and a water film is formed within the pipe by spraying water into as wide an area as possible. ing.

  For example, Patent Documents 1 to 3 disclose a nozzle tube that allows water to be sprayed in almost all directions in the horizontal direction by forming a plurality of horizontal holes in the side surface of the nozzle tube to spray the fan in the horizontal direction.

JP-A-8-92564 Japanese Utility Model Publication No. 6-83755 Japanese Utility Model Publication No. 6-54755

  However, as in Patent Documents 1 to 3, a configuration in which a lateral hole is formed on the side surface of the nozzle tube and the water is sprayed radially or in a fan shape from the lateral hole is accompanied by the growth of the carbon adhering to the nozzle tube. In this way, the problem that the narrow lateral hole is blocked occurs.

  The present invention has been made paying attention to such problems, and the object thereof is to provide a carbon adhesion suppressing device having a structure capable of fountaining as much as possible in the vent pipe and preventing the nozzle for fountain from being blocked. Is to provide.

  In order to achieve this object, the present invention takes the following measures.

  That is, the carbon adhesion suppressing device of the present invention is provided in a nozzle pipe for supplying pressure water into a vent pipe of a coke oven, and a connecting portion of the vent pipe and the ascending pipe of the coke oven. A ring pipe for forming an opening for preventing backflow, and a protruding plate protruding in a horizontal direction or a substantially horizontal direction from a vertical end surface of the ring pipe is provided at an upper edge of the opening, The projecting plate is arranged in an arc shape when viewed along the tube axis direction of the ring tube, and the pressure water is disposed between the projecting plate and the inner peripheral surface of the ring tube along the circumferential direction of the ring tube. The nozzle tube is configured to be able to inject pressure water from the injection port at the tube tip along the axial direction of the nozzle tube, and is at the highest position of the protruding plate Pressure from above the top surface toward the top surface Characterized in that attached to a position for injecting.

  Here, “substantially horizontal direction” means within a range of ± 20 ° with respect to the horizontal direction. In order to sprinkle water further, a range of ± 5 ° is preferable.

  In this way, the nozzle tube is configured to be able to inject pressure water from the injection port at the tip of the tube along the axial direction of the nozzle tube, so it can be injected radially by forming the injection port as thin as a slit Compared with the nozzle pipe made in this way, the injection port can be formed larger, and the blockage of the injection port by carbon can be suppressed. Nevertheless, since the pressure water is jetted from the top of the top surface of the projecting plate to the top surface, the pressure water hitting the projecting plate is scattered horizontally along the projecting plate, and the pressure water is It becomes possible to inject radially in the tube axis direction. Further, the protruding plate is arranged in an arc shape when viewed along the tube axis direction of the ring tube, and allows pressure water to flow along the circumferential direction of the ring tube between the protruding plate and the inner peripheral surface of the ring tube. Thus, the pressure water can be circulated in the circumferential direction of the ring tube along the protruding plate. Therefore, even if the nozzle tube is simply configured to inject only in one direction, the protruding plate guides the pressure water in the tube axis direction and the circumferential direction of the ring tube, so that the water can be sprayed over a wide range in the vent tube.

  In order to further suppress the blocking of the nozzle tube, the top surface is preferably formed as a flat surface.

  In order to form an appropriate water film on the vertical end surface of the ring tube to which carbon easily adheres, the projecting amount of the arc end portion of the projecting plate decreases from the top surface toward the tip in the circumferential direction along the arc. It is preferable to be formed.

  In order to reduce the backflow to the ascending pipe, the arc end portion of the projecting plate is formed from the root that is a connection portion with the vertical end surface toward the projecting end along the tube axis direction of the ring tube. It is preferable to face the outside in the radial direction.

  In order to facilitate the formation of a water film on the receiving surface protruding to the riser side, the ring tube includes an inclined wall inclined from the vertical end surface of the ring tube toward the riser side, and a side portion of the inclined wall. A side wall extending to the vertical end surface, and the inclined wall and the side wall form a receiving surface for preventing backflow of the pressure water, and a virtual arc line is drawn along the arc of the protruding plate In addition, it is preferable that the side wall is disposed at a position outside the virtual arc line in the radial direction of the ring tube and receiving water falling from the protruding plate while being transmitted along the vertical end face.

Sectional drawing which shows typically the surrounding structure of the riser pipe and vent pipe of a coke oven to which the carbon adhesion suppression apparatus of this invention is applied. The front view which looked at the ring pipe from the vent pipe side. AA site | part sectional drawing in FIG. The perspective view which looked at the circular-arc edge part of the protrusion board from the inner side.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, a vent pipe 3 is connected in a horizontal direction to a rising pipe 1 extending in the vertical direction. The riser 1 communicates with the coking oven carbonization chamber. The vent pipe 3 communicates with the air collecting main pipe 2. A nozzle pipe 4 for supplying pressure water into the pipe of the vent pipe 3 is provided. A ring pipe 5 for forming an opening 5h for preventing backflow of pressure water is provided at a connection portion between the ascending pipe 1 and the vent pipe 3. The gas generated in the carbonization chamber when carbonizing the coal passes through the ascending pipe 1 through the opening 5h of the ring pipe 5 to the vent pipe 3 and is injected from the nozzle pipe 4 as indicated by arrows in the figure. And is sucked into the air collecting main pipe 2.

  As shown in FIGS. 1 to 3, the ring pipe 5 is attached so that the pipe axial direction AD is substantially coaxial with the vent pipe 3, and has a short cylindrical shape having a vertical end face 50 in which an opening 5 h is formed. ing. At the upper end of the opening 5 h of the ring tube 5, a protruding plate 51 that protrudes in the horizontal direction from the vertical end surface 50 is provided. The protruding plate 51 is arranged in an arc shape when viewed along the tube axis direction AD of the ring tube 5. Thereby, a flow path for flowing pressure water along the circumferential direction CD of the ring tube 5 is formed between the protruding plate 51 and the inner peripheral surface 52 of the ring tube 5.

  The nozzle tube 4 is formed in a cylindrical shape having a circular cross section, and is configured to be able to inject pressure water along the axial direction of the nozzle tube 4 from a nozzle outlet at the tip of the tube. The nozzle tube 4 is attached to a position where pressure water is ejected from above the top surface 51a at the highest position of the protruding plate 51 toward the top surface 51a. In the present embodiment, the nozzle pipe 4 injects pressure water directly below.

  Since the protruding plate 51 of the ring tube 5 is arranged in an arc shape, the upper surface is curved, but a flat plate 53 is attached to a portion where pressure water is injected. By the flat plate 53, the top surface 51a is formed into a flat surface. As a result, the pressure water hitting the top surface 51a is likely to rebound upward.

  As shown in FIGS. 3 and 4, the arc end portion 51 b of the protruding plate 51 is formed so that the protruding amount becomes smaller from the top surface 51 a toward the circumferential tip 51 c along the arc. The protrusion amount D1 shown in the drawing is smaller than the protrusion amount D2. Specifically, the corners of the arc end 51b are chamfered and inclined in a tapered shape. As a result, the pressure water transmitted through the protruding plate 51 is likely to move toward the vertical end surface 50 side (rising pipe 1 side), and a water film is appropriately formed on the receiving surface (inclined wall 54 and side wall 55) and the vertical end surface 50 where carbon is likely to adhere. It becomes possible to form.

  Further, as shown in FIG. 2, the arc end portion 51 b of the projecting plate 51 protrudes from the root 51 d which is a connection portion with the vertical end surface 50 along the tube axis direction AD of the ring tube 5 (FIGS. 3 and 4). It faces the radially outer side RD1 as it goes to (see). Thereby, when pressure water leaves | separates from the circular arc edge part 51b, it becomes easy to go to radial direction outer side RD1.

  As shown in FIGS. 2 to 4, the ring tube 5 has an inclined wall 54 inclined from the vertical end surface 50 of the ring tube 5 toward the rising tube side, and a side wall 55 extending from the side of the inclined wall 54 to the vertical end surface 50. . As shown in FIG. 3, the inclined wall 54 and the side wall 55 protrude from the vertical end surface 50 toward the ascending pipe, and these form a receiving surface for preventing the backflow of pressure water. As shown in FIGS. 2 and 4, the opening 5 h of the ring pipe 5 is formed in a closed region defined by the inclined wall 54, the side wall 55, and the root 51 d of the protruding plate 51.

  As shown in FIGS. 2 and 4, when a virtual arc line L (shown by a dotted line) is drawn along the protruding plate 51, the side wall 55 is perpendicular to the radial outer side RD <b> 1 of the ring tube 5 relative to the virtual arc line L. It is connected to the end face 50. That is, the side wall 55 is disposed at a position that is on the outer side RD1 in the radial direction of the ring tube 5 with respect to the virtual arc line L and receives water falling from the protruding plate 51 while traveling along the vertical end surface 50. As a result, as indicated by the alternate long and short dash line in the drawing, the pressure water flowing along the arc-shaped protruding plate 51 reaches the side wall 55 and a part of the pressure water flows into the side wall 55, so that the side wall 55 and the inclined wall 54 A water film can be formed on the configured receiving surface.

  In the above configuration, if the water pressure of the pressure water supplied to the nozzle tube 4 is set to a predetermined pressure, a part of the water hitting the top surface 51a rebounds upward as shown by a one-dot chain line in FIG. A water film is formed on the inner peripheral surface of 5 and the tip of the nozzle tube 4, and a part of the pressure water is directed to the vertical end surface 50 to form a water film on the vertical end surface 50. As shown in FIGS. 2 and 3, a part of the pressure water scatters radially along the tube axis direction AD of the ring tube 5 toward the downstream side of the vent tube 3. Further, as shown in FIG. 2, part of the pressure water flows along the arcuate protruding plate 51, and a water film is formed on the inner peripheral surface 52 of the ring pipe 5. Further, part of the pressure water that has flowed down from the protruding plate 51 flows into the side wall 55, and forms a water film on the receiving surface constituted by the side wall 55 and the inclined wall 54. As described above, it is possible to appropriately form a water film in a wide range while having a simple configuration.

  As described above, the carbon adhesion suppressing device of the present embodiment is connected to the nozzle pipe 4 for supplying pressure water into the pipe of the vent pipe 3 of the coke oven, and the connecting portion of the vent pipe 3 and the rise pipe 1 of the coke oven. And a ring tube 5 for forming an opening 5h for preventing backflow of pressure water. At the upper edge of the opening 5h, a protruding plate 51 protruding in the horizontal direction from the vertical end face 50 of the ring tube 5 is provided, and the protruding plate 51 has an arc shape when viewed along the tube axis direction AD of the ring tube 5. Has been placed. Between the protruding plate 51 and the inner peripheral surface 52 of the ring tube 5, a flow path f for flowing pressure water along the circumferential direction CD of the ring tube 5 is formed. The nozzle tube 4 is configured to be able to inject pressure water from the injection port at the tip of the tube along the axial direction of the nozzle tube 4, from above the top surface 51 a at the highest position of the protruding plate 51 toward the top surface 51 a. It is attached to the position where the pressure water is jetted.

  In this way, the nozzle tube 4 is configured to be able to eject the pressure water from the injection port at the tip of the tube along the axial direction of the nozzle tube 4, so that the injection port is formed radially like a slit. Compared to the nozzle tube that enables injection, the injection port can be formed larger, and the blockage of the injection port by carbon can be suppressed. Nevertheless, since the pressure water is jetted from above the top surface 51a at the highest position of the projecting plate 51 toward the top surface 51a, the pressure water hitting the projecting plate 51 is scattered in the horizontal direction along the projecting plate 51, and the pressure Water can be ejected radially in the tube axis direction AD of the ring tube 5. Further, the protruding plate 51 is arranged in an arc shape when viewed along the tube axis direction AD of the ring tube 5, and the circumferential direction CD of the ring tube 5 is disposed between the protruding plate 51 and the inner peripheral surface 52 of the ring tube 5. Since the flow path f for flowing the pressure water along is formed, the pressure water can be circulated along the protruding plate 51 in the circumferential direction CD of the ring tube 5. Accordingly, even if the nozzle tube 4 is simply configured to inject only in one direction, the projecting plate 51 guides the pressure water in the tube axis direction AD and the circumferential direction CD of the ring tube 5, so that it is in a wide range in the vent tube 3. A fountain is possible.

  In the present embodiment, the top surface 51a is formed as a flat surface. According to this configuration, the pressure water that hits the top surface 51a is likely to scatter upward, it is easy to form a water film on the tip of the nozzle tube 4, and the blocking of the nozzle tube 4 can be further suppressed. It becomes.

  In the present embodiment, the arc end portion 51b of the protruding plate 51 is formed such that the protruding amount decreases as it goes from the top surface 51a toward the circumferential tip 51c along the arc. According to this configuration, the pressure water that is transmitted through the projecting plate 51 at the arc end 51b of the projecting plate 51 is easily directed to the vertical end surface 50 side (rising pipe 1 side), and the receiving surface (inclined wall) on which carbon is likely to adhere. 54, the side wall 55) and the vertical end face 50 can form an appropriate water film.

  In the present embodiment, the arc end portion 51b of the projecting plate 51 faces the radially outer side RD1 from the root 51d, which is a connection portion with the vertical end surface 50, toward the projecting end 51e along the tube axis direction AD of the ring tube 5. Yes. According to this configuration, the water flowing down from the arc end 51b of the projecting plate 51 is directed to the radially outer side RD1, so that it is possible to prevent the water from flowing back to the ascending pipe 1 through the opening 5h located on the inner side in the circumferential direction. Become.

  In the present embodiment, the ring tube 5 has an inclined wall 54 that is inclined from the vertical end surface 50 of the ring tube 5 to the rising tube 1 side, and a side wall 55 that extends from the side of the inclined wall 54 to the vertical end surface 50. The inclined wall 54 and the side wall 55 form a receiving surface for preventing the backflow of pressure water. When the virtual arc line L is drawn along the arc of the protruding plate 51, the ring tube 5 is more than the virtual arc line L. The side wall 55 is disposed at a position on the radially outer side RD1 that receives water falling from the protruding plate 51 while passing through the vertical end surface 50.

  According to this configuration, a part of the pressure water that flows along the arc (virtual arc line L) of the protruding plate 51 flows into the side wall 55, and therefore the receiving surface (inclined wall 54, side wall 55) that protrudes toward the rising pipe side. A water film can be formed, and carbon adhesion can be suppressed.

  As mentioned above, although embodiment of this invention was described based on drawing, a specific structure is not limited to these embodiment. The scope of the present invention is shown not only by the above description of the embodiments but also by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the present embodiment, the protruding plate 51 protrudes in the horizontal direction, but does not have to be strictly in the horizontal direction, and may be in the substantially horizontal direction. Here, “substantially horizontal direction” means within a range of ± 20 ° with respect to the horizontal direction. In order to sprinkle water further, a range of ± 5 ° is preferable.

  The direction in which the pressure water is ejected from the nozzle tube 4 is not limited to just below, and the direction of the pressure water can be appropriately changed as long as it is toward the top surface 51a.

  In this embodiment, the flat plate 53 is attached to the highest position of the protruding plate 51 and the top surface 51a is formed as a flat surface. However, without attaching the flat plate 53, the protruding plate 51 is processed to form a flat surface. Also good. Further, the highest position of the protruding plate 51 may remain a curved surface.

  In the present embodiment, the tapered surface is formed so that the protruding amount of the protruding plate 51 gradually decreases from the top surface 51a toward the circumferential tip 51c, but the protruding amount may not be changed. Moreover, although the taper surface is formed and the protrusion amount is gradually reduced, it is not restricted to this, For example, you may form a curved surface.

  In the present embodiment, the arc end portion 51b of the projecting plate 51 faces the radially outer side RD1 from the root 51d, which is a connection portion with the vertical end surface 50, toward the projecting end 51e along the tube axis direction AD of the ring tube 5. However, it is not limited to this. For example, the protruding plate 51 may stand upright from the vertical end surface 50.

  In the present embodiment, the side wall 55 is connected to the vertical end surface 50 on the radially outer side than the virtual arc line L, but is not limited to this. For example, the side wall 55 may be connected to the vertical end surface 50 on the virtual arc line L or on the radially inner side of the virtual arc line L.

  The structure employed in each of the above embodiments can be employed in any other embodiment. The specific configuration of each unit is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Rising pipe 3 ... Vent pipe 4 ... Nozzle pipe 5 ... Ring pipe 5h ... Opening part 51 ... Projection plate 51a ... Top surface 51b ... Arc end 51c ... Circumferential front end 51d ... Base of projection plate 51e ... Projection end 52 ... Ring tube 54 ... Inclined wall 55 ... Side wall 50 ... Vertical end face L ... Virtual arc line f ... Channel AD ... Pipe tube axial direction CD ... Ring tube circumferential direction RD1 ... Ring tube radial outer side

Claims (6)

In order to form a nozzle pipe for supplying pressure water into the pipe of the coke oven vent pipe, and an opening for preventing the backflow of the pressure water, provided at a connection portion of the vent pipe and the rise pipe of the coke oven A ring tube, and
The upper edge of the opening is provided with a protruding plate that protrudes in a horizontal direction or a substantially horizontal direction from a vertical end surface of the ring tube,
The protruding plate is arranged in an arc shape when viewed along the tube axis direction of the ring tube, and the pressure along the circumferential direction of the ring tube is between the protruding plate and the inner peripheral surface of the ring tube. A flow path for flowing water is formed,
The nozzle tube is configured to be able to eject pressure water from an injection port at the tube tip along the axial direction of the nozzle tube, and pressure is applied from above the highest top surface of the projecting plate toward the top surface. A carbon adhesion suppressing device, which is attached to a position where water is jetted.   The carbon adhesion suppressing device according to claim 1, wherein the top surface is formed as a flat surface.   3. The carbon adhesion suppressing device according to claim 1, wherein an arc end portion of the protruding plate is formed such that a protruding amount decreases from the top surface toward the distal end in the circumferential direction along the arc.   The arc end portion of the projecting plate faces the radially outer side of the ring tube from the root which is a connecting portion with the vertical end surface toward the projecting end along the tube axis direction of the ring tube. The carbon adhesion suppression apparatus in any one of. The ring tube has an inclined wall inclined from the vertical end surface of the ring tube to the rising tube side, and a side wall extending from a side portion of the inclined wall to the vertical end surface, and the inclined wall and the side wall are the pressure It forms a receiving surface to prevent water backflow,
When a virtual arc line is drawn along the arc of the protruding plate, the ring tube is located radially outside the virtual arc line and receives water falling from the protruding plate while traveling along the vertical end surface. The carbon adhesion suppressing device according to any one of claims 1 to 4, wherein a side wall is disposed.   A coke oven, to which the carbon adhesion suppressing device according to any one of claims 1 to 5 is attached.

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