JP2011140599A - Apparatus for removing carbonaceous deposit and method for removing carbonaceous deposit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To uniformly remove a carbonaceous deposit over the whole length of a riser and prevent hardening and increase of removing difficulty of the carbonaceous deposit by frequently performing the removing operation. <P>SOLUTION: The carbonaceous deposit removing apparatus 20 is configured to include a grinding means 20 to be inserted into the riser 1 of a coke oven 10 and grind the carbonaceous deposit 2 attached to the inner face of the riser 1, and a moving means 40 to vertically move the grinding means 20 in the riser 1. The grinding means 20 is provided with a rotor 34 supported by a rotary shaft 33 extending in vertical direction, a rotation driving apparatus 32 to rotate the rotor 34 with the rotary shaft 33, and a bendable grinding blade 35 formed on the outer circumference of the rotor 34. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a carbon deposit removing apparatus and method for removing carbon deposits deposited in a rising pipe of a coke oven.

  The coke oven gas generated during the carbonization of coal in the coke oven is pyrolyzed by the high temperature environment of the carbonization chamber to generate carbon. The generated carbon precipitates and adheres to the inner wall of the carbonization chamber and the inner surfaces of peripheral equipment such as a riser pipe and a bend pipe that lead the coke oven gas from the upper part of the carbonization chamber. Thus, the carbon deposits adhering to the inner surface refractory etc. of the riser pipe of the coke oven cause operation troubles such as blocking the dry distillation gas flow path.

  Conventionally, as a method for removing the carbon deposit 2 in the riser 1, as shown in FIG. 1, removal by manual push-down work using a metal rod 3 or removal by mechanical crushing / cutting using a cutting tool. (For example, refer to Patent Document 1). Further, in recent years, as shown in FIG. 2, a method in which compressed air or oxygen is blown onto the carbon deposits 2 in the ascending pipe 1 and burned and removed from the blowing device 4 disposed on the lower side of the ascending pipe 1 is also implemented. (For example, refer to Patent Documents 2 and 3).

JP-A-2-047187 Japanese Patent Laid-Open No. 7-247482 JP-A-10-279947

  However, carbon deposits that harden by adhering to the riser for a long period of time have a dense structure and high mechanical strength. Therefore, it was difficult to remove efficiently without unevenness.

  That is, the carbon deposit adhered to the inner surface refractory or the like of the riser pipe as described above becomes denser and harder after a long time, and further increases the mechanical strength. For this reason, the scraping with the metal rod 3 shown in FIG. 1 or the mechanical cutting method as in Patent Document 1 is difficult even if the hardened carbon deposits cannot be cut or can be cut. Therefore, the removal efficiency was extremely poor. Therefore, it has been very difficult to remove carbon deposits over the entire length of the riser within a limited time.

  In addition, the combustion removal method shown in FIG. 2 (see Patent Documents 2 and 3) can also burn and remove hardened carbon deposits and approaches the riser 1 in a time that does not cause production failure. The removal method is more efficient than the mechanical cutting. However, since the carbon deposit 2 is incinerated and removed from the lower side by blowing air or the like from the lower side of the riser 1, all the carbon deposits 2 in the riser 1 are limited within a limited time. Cannot be incinerated. For this reason, the carbon deposit 2 could not be uniformly removed over the entire length h (for example, h = about 6 m, inner diameter φ = 550 mm) of the rising pipe.

  Specifically, in order to avoid coke production obstacles in the coke oven, the carbon deposits in the riser are removed within the time (for example, about 15 to 20 minutes) during which the coke in the carbonization chamber is pushed out and carried out. There is a need. However, when the combustion removal method shown in FIG. 2 is adopted, even if air is blown from the lower side of the riser 1, the portion to which the air hits becomes selective, so the efficiency of removing the carbon deposit 2 is poor, In the removal operation in a short time, removal unevenness occurs both in the axial direction and in the circumferential direction of the riser 1. For example, even if the carbon deposit 2 on the lower side of the ascending pipe 1 into which air is blown can be burned and removed, the carbon deposit 2 on the upper side remains.

  As described above, the conventional combustion removal method has a drawback in that carbon deposits that cannot be removed by a short-time removal operation remain locally, resulting in removal unevenness. For this reason, there has been a problem that the remaining carbon deposit (remaining part) is hardened and causes a more difficult removal.

  Therefore, the present invention has been made in view of the above problems, and the object of the present invention is to remove carbon deposits in a short time without any unevenness over the entire length of the ascending pipe. It is an object of the present invention to provide a new and improved carbon deposit removing apparatus and method capable of preventing hardening and difficult removal of carbon deposits by frequently carrying out the above.

  In order to solve the above-mentioned problems, the inventor of the present application has made intensive research and made a cutting device that cuts carbon deposits in the riser with a light apparatus configuration, and frequently removes carbon deposits in each riser. When implemented, the inventors focused on the point that the carbon deposits can be prevented from being hardened and removed. In order to carry out the removal work at a high frequency in a cycle in which the carbon deposits adhering in the riser do not harden, it is necessary to reduce the removal work time of each individual riser using a cutting device in a short time.

  Then, while giving up the removal of the hard carbon that had already been hardened in the riser, a method of repeatedly removing the relatively soft soft carbon before being hardened frequently over the entire length of the riser was found. By this method, carbon deposits can be removed uniformly over the entire length of the riser, and the removal work time in each riser can be shortened. Therefore, since the removal work for a large number of risers installed in the coke oven can be carried out at a high frequency, it is possible to prevent the carbon deposits in the riser from becoming hard and difficult to remove, and severe operation failures such as the riser being blocked. It is possible to reliably prevent the occurrence of. The inventor of the present application has arrived at the present invention as follows based on such knowledge.

  According to an aspect of the present invention, a cutting means that is inserted into a riser pipe of a coke oven and cuts carbon deposits attached to the inner surface of the riser pipe, and a movement that moves the cutting means in the vertical direction within the riser pipe And the cutting means is provided on a rotating body supported by a rotating shaft extending in a vertical direction, a rotation driving device for rotating the rotating body via the rotating shaft, and an outer periphery of the rotating body. And a retractable cutting blade. A carbon deposit removing device is provided.

  According to another aspect of the present invention, in the carbon deposit removal method for removing the carbon deposit adhered to the riser pipe of the coke oven, the rotating body supported by a rotating shaft extending in the vertical direction, and the rotation A cutting means comprising a rotation drive device for rotating the rotating body via a shaft and a retractable cutting blade provided on the outer periphery of the rotating body is inserted into the rising pipe and moved in the vertical direction, A carbon deposit removing method is provided, wherein the carbon deposit is cut over the entire riser by the cutting blade.

  Further, the retractable cutting blade stands up by a centrifugal force accompanying the rotation of the rotating body, cuts the carbon deposit less than a predetermined strength, and comes into contact with the carbon deposit greater than the predetermined strength. Sometimes it may be tilted.

  In addition, the carbon deposit is hardened by adhering to the inner surface of the riser, the hard carbon having a porosity of less than 40%, and the porosity adhering to the inner peripheral side of the hard carbon having a porosity of 40% or more. The retractable cutting blade cuts the soft carbon in an upright state when it comes into contact with the soft carbon, and escapes from the hard carbon when it comes into contact with the hard carbon. You may make it lean to.

  According to the carbon deposit removing apparatus and method described above, the carbon deposit is cut by the cutting blade by moving the inside of the rising pipe in the vertical direction while rotating the rotating body having the tiltable cutting blade. Can be removed. At this time, the retractable cutting blade stands up by the centrifugal force accompanying the rotation of the rotating body, and mainly cuts relatively soft soft carbon deposits before being hardened, so that the entire length of the riser pipe is increased. The soft carbon deposit can be removed in a short time without unevenness. Further, the retractable cutting blade can tilt in the horizontal direction or the vertical direction so as to escape from the hard carbon deposit when it comes into contact with the hardened hard carbon deposit. Never cut. Therefore, by using the above-described retractable rotary blade-shaped cutting device, it is possible to efficiently remove the soft carbon deposits before being hardened, and to leave the hard carbon deposits that are difficult to remove by leaving them alone. it can. Therefore, since the removal work time for each riser can be shortened, the removal work of a large number of risers can be performed with high frequency.

  As described above, according to the present invention, carbon deposits can be removed uniformly in a short time over the entire length of the ascending pipe. By frequently performing the removal operation, the carbon deposits are hardened and Removal difficulty can be prevented.

It is explanatory drawing which shows the scraping off removal method by the conventional human power. It is explanatory drawing which shows the combustion removal method by the conventional air. 1 is a perspective view showing a coke oven according to a first embodiment of the present invention. It is a front view which shows the carbon deposit removal apparatus of the coke oven which concerns on the same embodiment. It is a front view which shows the carbon deposit removal apparatus of the coke oven which concerns on the example of a change of the embodiment. It is a longitudinal cross-sectional view which shows the cutting device which concerns on the same embodiment. It is the longitudinal cross-sectional view (a) and bottom view (b) which show the front-end | tip part of the cutting device concerning the embodiment. It is the longitudinal cross-sectional view (a) and bottom view (b) which show the front-end | tip part of the cutting device which concerns on the example of a change of the embodiment. It is a longitudinal cross-sectional view which shows the cutting device which concerns on the 2nd Embodiment of this invention. It is a bottom view which shows the cutting device which concerns on the same embodiment. It is explanatory drawing which shows the cycle of the removal operation | work of carbon deposits. It is explanatory drawing which shows the cycle of the removal operation | work of carbon deposits. It is explanatory drawing which shows the cycle of the removal operation | work of carbon deposits. It is explanatory drawing which shows the cycle of the removal operation | work of carbon deposits. It is explanatory drawing which shows the cycle of the removal operation | work of carbon deposits.

  Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

[1. Outline of coke oven]
First, with reference to FIG. 3, the outline | summary of the coke oven 10 which comprised the carbon deposit removal apparatus 20 which concerns on the 1st Embodiment of this invention is demonstrated. FIG. 3 is a perspective view showing the coke oven 10 according to the present embodiment.

  As shown in FIG. 3, the coke oven 10 has a structure in which carbonization chambers 11 and combustion chambers 12 are alternately arranged in the horizontal direction, and the carbonization chamber 11 and the combustion chamber 12 are furnace walls 13 made of a refractory or the like. It is divided by. The number of the carbonization chambers 11 and the combustion chambers 12 may be arbitrarily plural. Generally, in one coke oven 10, several tens to several hundreds of carbonization chambers 11 and combustion chambers 12 are installed.

  A plurality of charging ports 14 are provided in the upper portion of the carbonizing chamber 11, and coal is charged into the carbonizing chamber 11 from the charging ports 14. Further, rails 15 and 15 are laid on the top surface of the coke oven 10, and the charging vehicle 16 travels on the rails 15 and 15 and enters the carbonization chambers 11 from the charging inlet 14. Charging coal. A rising pipe 1 (see FIGS. 1 and 2) for discharging coke oven gas (coal distillation gas) is erected on the upper side of the carbonization chamber 11.

  In the combustion chamber 12, combustion gas introduced from the outside burns, and the combustion heat is conducted to the carbonization chamber 11. In the carbonization chamber 11, the coal is carbonized using the heat from the combustion chamber 12 to generate coke. The coke oven gas generated during the dry distillation of the coal is discharged out of the furnace through the riser 1. Further, after the coke is generated, the extruder 18 uses the extruder ram 19 to push out the coke in the carbonization chamber 11 from one side to the other side and carry it out of the furnace. During the coke extruding / carrying out operation, the carbon deposit 2 in the ascending pipe 1 is removed.

  Here, the carbon deposit 2 will be described. As described above, coke oven gas is generated during the dry distillation of the raw coal in the coke oven 10, and carbon is generated when the coke oven gas is thermally decomposed in the high temperature environment of the carbonization chamber. The generated carbon is deposited and adheres to the inner surface of the riser 1 to form a carbon deposit 2 as shown in FIGS. Since the carbon deposit 2 becomes dense and hardened after a long time and increases the mechanical strength, it is difficult to remove the hardened carbon deposit 2.

  Therefore, the carbon deposit removing apparatus and method according to the present embodiment is light, compact and has a high output in order to remove the carbon deposit 2 before the carbon deposit 2 adhering to the inner surface of the riser 1 is hardened. The carbon deposits 2 are removed quickly and frequently using the cutting apparatus.

[2. Configuration of carbon deposit removal device]
Below, with reference to FIG.3 and FIG.4, the carbon deposit removal apparatus 20 which concerns on this embodiment is demonstrated. FIG. 4 is a front view showing the coke oven 10 equipped with the carbon deposit removing device 20 according to the present embodiment.

  As shown in FIGS. 3 and 4, the carbon deposit removing device 20 is provided in the upper part of the coke oven 10. The carbon deposit removing device 20 includes a carriage 21 traveling on the rails 15, a crane mechanism 22 installed on the carriage 21, a frame body 23 suspended by the crane mechanism 22, and a frame body 23. A cutting device 30 is provided, and a moving mechanism 40 that moves the cutting device 30 up and down in the vertical direction. The cutting device 30 corresponds to the cutting means of the present invention, and has a function of cutting the carbon deposit 2 that is inserted into the rising pipe 1 of the coke oven 10 and adhered to the inner surface of the rising pipe 1. The moving mechanism 40 corresponds to the moving means of the present invention, and has a function of moving the cutting device 30 as the cutting means in the vertical direction in the ascending pipe 1.

  The carriage 21 travels on the same rails 15 and 15 as the loading vehicle 16 by a driving device (not shown). Thereby, the carbon deposit removing device 20 can access the plurality of risers 1 by moving the upper part of the coke oven 10 in the horizontal direction. The crane mechanism 22 rotates the arm with a drive device (not shown), and positions the frame body 23 on which the cutting device 30 is mounted above the rising pipe 1.

  The frame body 23 includes a cylindrical vertical frame 24 and a horizontal base 25 provided near the center of the vertical frame 24. The frame body 23 is suspended by the crane mechanism 22, and the lower end of the vertical frame 24 of the frame body 23 is configured to be detachably engaged with the upper end of the rising pipe 1. A cutting device 30 and a moving mechanism 40 are mounted on the frame body 23.

  The moving mechanism 40 includes a winch 41 installed on the horizontal base 25, a support body 42 that supports the cutting device 30, and a wire 43 that connects the upper end of the support body 42 and the winch 41. The wire 43 is suspended via a pulley 44 provided at the upper end of the frame body 23 to suspend the support body 42. With this structure, when the winch 41 feeds / winds up the wire 43, the cutting device 30 attached to the lower end of the support 42 moves up and down in the vertical direction.

  A method for removing the carbon deposit 2 in the riser 1 using the carbon deposit removing apparatus 20 having the above-described configuration will be described.

  First, the carriage 21 is moved to move the carbon deposit removing device 20 to the vicinity of the ascending pipe 1 to be cleaned. Next, the frame body 23 is arranged on the upper part of the rising pipe 1 using the crane mechanism 22, and the lower end of the frame body 23 is engaged with and fixed to the upper end of the rising pipe 1. Thereafter, the cutting device 30 is moved downward by feeding the wire 43 from the winch 41 of the moving mechanism 40, and the cutting device 30 is inserted into the rising pipe 1. Then, while rotating the rotary blade of the cutting device 30, the cutting device 30 is moved (scanned) at a constant speed from the upper part to the lower part in the rising pipe 1. Thereby, the carbon deposit 2 adhered to the inner surface of the riser 1 is cut and removed over the entire length of the riser 1 by the cutting device 30. Details of the cutting device 30 will be described later.

  The removal work (cleaning work) of the carbon deposits 2 in the riser 1 only needs to scan the cutting device 30 at a constant speed over the entire length of the riser 1 (for example, 6 m), and can be executed in a short time. . After the removal work of one ascending pipe 1 is completed in this way, the carriage 21 is moved, and the carbon deposit removing device 20 is disposed in the vicinity of the ascending pipe 1 to be cleaned next. Perform the removal work. As described above, the carbon deposit removing device 20 sequentially accesses a large number (for example, 100) of the rising pipes 1 provided in the coke oven 10 to remove the carbon deposit 2.

  Since the operation machine such as the above-mentioned charging vehicle 16 is always operating on the top surface of the coke oven 10, the carbon deposit removing device 20 does not interfere with the operation of the charging vehicle 16. There must be. For example, it is required to perform the removal work by the carbon deposit removing device 20 without interfering with the coal work by the charging vehicle 16. Therefore, the carbon deposit removing device 20 may be folded so that the charging vehicle 16 can pass through the opening 16a provided as a passage for the worker. With this structure, the carbon deposit removing device 20 can move over the charging vehicle 16 on the top surface of the furnace, so that the carbon deposit 2 removal operation can be performed without hindering the coal loading operation. It becomes like this.

  Next, with reference to FIG. 5, the carbon deposit removing apparatus 20 according to the modified example of the present embodiment will be described. FIG. 5 is a front view showing the coke oven 10 equipped with the carbon deposit removing device 20 according to the modified example of the present embodiment.

  In the example of FIG. 4 described above, the carbon deposit removing device 20 is moved by the carriage 21 traveling on the rails 15, 15 laid on the top surface of the coke oven 10. On the other hand, in the example shown in FIG. 5, the carbon deposit removing device 20 is caused by the portal carriage 26 traveling on rails 27, 27 separately provided in the vicinity of the rising pipe 1 separately from the rails 15, 15. It is a structure to move.

  Specifically, as shown in FIG. 5, a horizontal base 28 is provided at a position straddling the riser 1 on the riser 1 side of the top surface of the coke oven 10. The horizontal table 28 is supported by support columns 29 arranged at appropriate intervals. Rails 27, 27 are laid on the horizontal base 28, and a portal carriage 26 that travels on the rails 27, 27 is disposed so as to straddle the riser 1. A frame body 23 on which the above-described cutting device 30 and moving mechanism 40 are mounted is installed on the portal trolley 26. The frame body 23 has the same structure as that described with reference to FIG.

  Even in the structure shown in FIG. 5, the frame body 23 on which the cutting device 30 and the moving mechanism 40 are mounted can be moved in the horizontal direction by the traveling of the portal trolley 26 and can be positioned immediately above the rising pipe 1. . Further, the cutting device 30 can be moved up and down by the moving mechanism 40 and inserted into each rising pipe 1. Therefore, also in the carbon deposit removing device 20 having the structure shown in FIG. 5, the cutting device 30 can easily and quickly approach the plurality of ascending pipes 1. Further, since the portal trolley 26 moves above the riser 1, the carbon deposit removing device 20 may interfere with the operation moving device such as the charging vehicle 16 provided on the top surface of the coke oven 10. Absent. Therefore, the removal work by the carbon deposit removing device 20 can be performed without hindering the continuous operation of the coke oven 10.

  As described above with reference to FIGS. 3 to 5, the carbon deposit removing device 20 according to the present embodiment includes a light cutting device 30 and a moving mechanism for moving up the furnace and ascending pipe approach. It is a combined structure. The moving mechanism has a structure that does not interfere with the operation moving device (the charging vehicle 16 or the like) of the coke oven 10 and does not impede the operation of the coke oven 10.

  The entire length of the riser pipe 1 of the carbonization chamber 11 within a short time (for example, 15 to 20 minutes) in which the coke in each carbonization chamber 11 is pushed out by the extruder 18 and carried out by the carbon deposit removing device 20 having the above configuration. The carbon deposits 2 can be quickly removed without unevenness. Therefore, even when a large number of risers 1 are provided in one coke oven 10, the removal work of the carbon deposits 2 adhering to the inner surface of each riser 1 can be continued with high frequency. Accordingly, since the carbon deposit 2 in a relatively soft state can be frequently removed before the carbon deposit 2 is hardened in each riser 1, at least a period until the lifetime of the riser 1 is exhausted (for example, several years). Can prevent the riser 1 from being blocked by the carbon deposit 2.

[3. Configuration of cutting device]
Next, with reference to FIG. 6, the structure of the cutting device 30 which the carbon deposit removal apparatus 20 which concerns on this embodiment comprises is demonstrated in detail. FIG. 6 is a longitudinal sectional view showing the cutting device 30 according to this embodiment.

  As shown in FIG. 6, the cutting device 30 includes a substantially cylindrical housing 31 having a size that can be inserted into the ascending pipe 1, a rotation drive device 32 installed in the housing 31, and rotation of the rotation drive device 32. A rotating body 34 attached to the lower end of the shaft 33 and a plurality of retractable cutting blades 35 attached to the outer periphery of the rotating body 34 are provided.

  The rotation drive device 32 is composed of an arbitrary motor such as an air motor or an electric motor, for example, and generates a driving force for rotating the rotating body 34 in a horizontal plane. The rotational driving force from the rotational driving device 32 is transmitted to the rotating body 34 via the rotational shaft 33. The rotary shaft 33 extends in the vertical direction, and the lower end thereof protrudes from the lower portion of the housing 31. The rotating body 34 is pivotally supported at the tip of the rotating shaft 33. The rotating body 34 has a substantially disk shape and is rotated in the horizontal direction by the rotation driving device 32. A plurality of (for example, three) cutting blades 35 are installed on the outer periphery of the rotating body 34 so as to be able to stand up and tilt in a horizontal plane.

  Here, with reference to FIG. 7, the structure of the front-end | tip part of the cutting device 30 which concerns on this embodiment is explained in full detail. FIG. 7 is a longitudinal cross-sectional view (a) and a bottom view (b) showing the tip of the cutting device 30 according to the present embodiment.

  As shown in FIG. 7, a shaft installation member 36 for mounting a rotating body 34 is attached to a rotation shaft 33 extending downward from the rotation drive device 32. The rotator 34 is attached to the shaft member 36, and the rotator 34 is connected to the cylindrical spacer 38 and the shaft by inserting a fastener 37 into a horizontal through hole 36 b provided in the lower portion of the shaft member 36. It is fixed between the base 36a of the installation member 36.

  The rotating body 34 includes a metal upper rotating plate 34a and a lower rotating plate 34b, both of which have a substantially disk shape. An annular gap 34c is formed on the outer peripheral side between the upper rotating plate 34a and the lower rotating plate 34b. With the cutting blade 35 sandwiched between the gap 34c, the upper rotating plate 34a and the lower rotating plate 34b are It is fixed with bolts 39 and nuts 391. The body portion 39a of the bolt 39 passes through the upper rotary plate 34a, the cutting blade 35, and the lower rotary plate 34b in order from above, and is screwed to the nut 391.

  The cutting blade 35 is made of a relatively hard metal, such as stainless steel, and has a substantially strip shape. In the illustrated example, the three cutting blades 35 are installed on the rotating body 34. However, the present invention is not limited to this example, and the number and thickness of the cutting blades 35 are set according to the characteristics of the carbon deposit 2 to be cut. It is preferable to select materials and the like as appropriate.

  The front end portion of the cutting blade 35 is a sharp blade, and the rear end portion of the cutting blade 35 is rotatably attached to the rotating body 34. An oblong hole 35a extending in the longitudinal direction of the cutting blade 35 is formed at the rear end portion of the cutting blade 35, and the body portion 39a of the bolt 39 is inserted into the oblong hole 35a. Thus, the cutting blade 35 can be freely rotated in the horizontal direction between the upper rotating plate 34a and the lower rotating plate 34b of the rotating body 34 while being locked by the body 39a of the bolt 39. A circular locus A indicated by a two-dot chain line in FIG. 7B represents a locus of the tip of the cutting blade 35 when the cutting blade 35 is rotated in the horizontal direction around the trunk portion 39a.

  As described above, the cutting blade 35 can be raised or tilted with respect to the rotating body 34 by rotating in the horizontal direction around the body portion 39a. Note that the cutting blade 35 indicated by the solid line in FIG. 7B is in a state where the cutting blade 35 stands up with respect to the rotating body 34, and in this standing state, the longitudinal direction of the cutting blade 35 is that of the rotating body 34. It matches or is close to the normal direction. On the other hand, the cutting blade 35 indicated by a two-dot chain line in FIG. 7B is in a state in which the cutting blade 35 is tilted with respect to the rotating body 34. In this tilted state, the longitudinal direction of the cutting blade 35 is the rotating body. 34 is coincident with or close to the tangential direction.

The structure of the cutting device 30 according to this embodiment has been described above. The cutting device 30 having such a structure functions as a rotary blade-shaped cutting tool. That is, when the rotating body 34 is rotated by the rotation driving device 32, the cutting blade 35 stands up due to the centrifugal force generated by the rotation of the rotating body 34, and the tip of the cutting blade 35 protrudes from the outer periphery of the rotating body 34. At the time of rotation of the rotating body 34, the locus of the tip of the standing cutting blade 35 becomes a circular locus B shown by a two-dot chain line B in FIG. 35 enables cutting. The diameter φ ₁ (for example, φ ₁ = 440 mm) of the circular locus is set to be smaller than the inner diameter φ (for example, φ = 550 mm) of the rising pipe 1 by an appropriate value.

[4. Modification of cutting device]
Next, with reference to FIG. 8, the structure of the cutting device 30 which concerns on the example of a change of this embodiment is demonstrated. FIG. 8 is a longitudinal sectional view (a) and a bottom view (b) showing the tip of the cutting device 30 according to a modified example of the present embodiment.

  In the example of the cutting apparatus 30 shown in FIG. 7, the cutting blade 35 has a structure that can be tilted only in the horizontal direction. However, in the example of the cutting apparatus 30 shown in FIG. It can be tilted in the direction.

  Specifically, as shown in FIG. 8, the rotary shaft 33 is provided with a shaft setting member 36 for setting the rotary body 34 in the same manner as in the example of FIG. 7. It is attached to the shaft member 36 by using. The rotating body 34 has an upper rotating plate 45, a smaller diameter than the upper rotating plate 45, a lower rotating member 46 joined to the lower side thereof, and a curved member connecting the upper rotating plate 45 and the lower rotating member 46. 47. The bending member 47 is curved in a circular arc shape with a central angle of 90 °, and one end of the bending member 47 is fixed to the upper rotating plate 45 and the other end of the bending member 47 is fixed to the lower rotating member 46. The bending member 47 is inserted into the oblong hole 35a of the cutting blade 35, and the cutting blade 35 is locked by the bending member 47 at the rear end. The cutting blade 35 is a substantially strip-shaped metal plate made of, for example, stainless steel as in the example of FIG. 7, and the number of cutting blades 35 is not limited to the three examples as shown in FIG. There may be more than one.

  The cutting blade 35 is pivotable in the horizontal direction along the upper rotary plate 45 a of the rotating body 34 while being locked by the curved member 47, and is also pivotable in the vertical direction along the curved member 47. It is. A circular locus A indicated by a two-dot chain line in FIG. 8B represents a locus of the tip of the cutting device 30 when the cutting blade 35 rotates in the horizontal direction around the bending member 47. A circular locus C indicated by a two-dot chain line in FIG. 8A represents a locus of the tip of the cutting blade 35 when the cutting blade 35 rotates in the vertical direction along the bending member 47.

  Thus, the cutting blade 35 can stand up or tilt with respect to the rotating body 34 by rotating in the horizontal direction or the vertical direction. In the example of FIG. 8, as in the example of FIG. 7, the cutting blade 35 can rotate in the horizontal direction and can stand / tilt with respect to the rotating body 34. Further, the cutting blade 35 indicated by the solid line in FIGS. 8A and 8B is in a state where the cutting blade 35 stands up with respect to the rotating body 34, and the cutting blade 35 in the standing state is Projects outward from the outer periphery. On the other hand, the cutting blade 35 indicated by a two-dot chain line in FIGS. 8A and 8B is a state in which the cutting blade 35 is tilted in the vertical direction with respect to the rotating body 34. Then, it enters inside the outer periphery of the rotating body 34. When the rotating body 34 is not rotating, the cutting blade 35 tilts in the vertical direction and hangs down from the bending member 47 (two-dot chain line in FIG. 8A).

  In the cutting apparatus 30 having the structure shown in FIG. 8 as described above, the cutting blade 35 is moved in the vertical direction and the horizontal direction by the centrifugal force generated by the rotation of the rotating body 34 by rotating the rotating body 34 by the rotation driving device 32. The tip of the cutting blade 35 protrudes from the outer periphery of the rotating body 34. At the time of rotation of the rotating body 34, the locus of the tip of the standing cutting blade 35 becomes a circular locus B indicated by a two-dot chain line B in FIG. 8B, and the cutting object existing inside the circular locus B is represented by the cutting blade. 35 enables cutting.

  Here, the difference between the cutting apparatus 30 having the structure shown in FIGS. 7 and 8 will be described. The cutting blade 35 of the cutting device 30 having the structure shown in FIG. 7 has a collapseability only in a horizontal plane, and the cutting blade 35 of the cutting device 30 having the structure shown in FIG. 8 is retractable in both the horizontal and vertical directions. Have sex. Such a degree of freedom in the tilting direction of the cutting blade 35 is advantageous in terms of transmission of the striking force to the object to be removed (carbon deposit 2) and up / down (scanning) operation trouble of the cutting device 30. Although the shape of the cutting blade 35 itself is the same in both FIGS. 7 and 8, the difference in shape of the pin parts (bolt 39 in FIG. 7 and the bending member 47 in FIG. 8) that supports the cutting blade 35 is related to the impact force. The characteristics of transmission and lifting movement obstacles are shown. For example, the structure shown in FIG. 7 has an advantage that the striking force with respect to the carbon deposit 2 is increased because the tilting direction of the cutting blade 35 is only the horizontal direction. The cutting blade 35 may be caught on the kimono 2. On the other hand, in the structure of FIG. 8, since the tilting direction of the cutting blade 35 is horizontal and vertical, the striking force against the carbon deposit 2 is small, but the cutting blade 35 is not easily caught, and the cutting device 30 There is an advantage that there is a low failure in raising / lowering operation.

[5. Cutting / removing action of carbon deposits by cutting device]
Next, the operation when the carbon deposit 2 in the riser 1 is removed using the cutting device 30 described in FIGS. 7 and 8 will be described with reference to FIG. 6 again.

  As shown in FIG. 6, the rotating device 34 is rotated by the rotary drive device 32 of the cutting device 30, and the cutting device 30 is inserted into the ascending pipe 1, and a constant speed is applied from the upper end to the lower end of the ascending pipe 1. Move with. Thereby, the carbon deposit 2 adhered to the inner surface of the rising pipe 1 is cut in order from the upper side of the rising pipe 1 by the cutting blade 35 erected with respect to the rotating body 34, and the internal space of the rising pipe 1 (that is, It is possible to expand the carbonization gas flow path).

  At this time, the retractable cutting blade 35 stands by the centrifugal force accompanying the rotation of the rotating body 34 and abuts against the carbon deposit 2 attached to the inner surface of the riser 1 to cut. When the carbon deposit 2 is soft carbon having a strength less than a predetermined strength, the cutting blade 35 maintains an upright state even when it comes into contact with the soft carbon, and suitably cuts and removes the soft carbon. On the other hand, when the carbon deposit 2 is hard carbon having a predetermined strength or higher, the cutting blade 35 tilts in the horizontal direction (rearward in the rotation direction) and does not cut the hard carbon when contacting the hard carbon. Run away.

  Here, hard carbon and soft carbon are defined by the porosity of carbon. The porosity represents the density of the tissue and is related to the strength of the bonding force of the tissue, and is directly related to the difficulty of cutting removal by the cutting tool. In this specification, the carbon deposit 2 having a porosity of 40% or more is defined as soft carbon (sponge-like carbon), and the carbon deposit 2 having a porosity of less than 40% is defined as hard carbon (dense carbon).

  As described above, the cutting blade 35 of the cutting device 30 according to the present embodiment is a tiltable type, and maintains an upright state without tilting when it comes into contact with a cutting object having a strength less than a predetermined strength. When it comes into contact with a cutting object having a predetermined strength or more, it is configured to tilt. Accordingly, the retractable cutting blade 35 can suitably cut relatively soft soft carbon, and can tilt and escape in a horizontal direction without forcibly cutting hard carbon that is difficult to cut. Therefore, the cutting device 30 does not cut the hard carbon that has adhered to the riser 1 and hardened, but by leaving it alone, a relatively soft soft carbon formed on the inner peripheral side of the hard carbon. Can be cut and removed easily and quickly. Therefore, since the cutting speed by the cutting device 30 (the descending speed of the cutting device 30) can be increased, the removal work of the carbon deposit 2 is completed over the entire length of the ascending pipe 1 within a limited short time. it can.

  As described above, the time for removing one riser pipe 1 is limited to a short time (for example, 15 to 20 minutes) in which the coke in the carbonizing chamber 11 is pushed out and carried out. However, if the cutting device 30 according to the present embodiment is used, the carbon deposit 2 can be efficiently removed over the entire length of the riser 1 within the short time, so that the operation failure of the coke oven 10 is not caused. .

  Moreover, in this embodiment, the inside of the riser 1 is moved at a constant speed over the entire length (for example, about 6 m) of the riser 1 while rotating the rotary blade-shaped cutting tool at a high speed as described above. At this time, the cutting blade 35 is raised by appropriately selecting a combination of cutting conditions such as the thickness d and the number n of the cutting blades 35, the rotational speed r of the rotating body 34, and the moving speed v of the cutting device 30. It is preferable to be in a state of uniformly contacting the inner surface of the tube 1. Further, the thickness d and the number n of the cutting blades 35 are increased, the rotation number r of the rotating body 34 is increased, or the cutting is performed within the range of the cycle time allowed for the removal work of the single rising pipe 1. As the moving speed v of the apparatus 30 is decreased, the removal performance of the carbon deposit 2 is improved, and the harder carbon deposit 2 can be removed.

  Here, consideration will be given to the setting criteria for each parameter such as the thickness d of the cutting blade 35, the number n of installation, the rotation number r of the rotating body 34, and the moving speed v of the cutting device 30. For example, the thickness d of the cutting blade 35 is 10 mm, provided that “the cutting blade 35 always comes into contact with the entire surface of the carbon deposit 2 in the riser 1 by one scanning by the cutting device 30”. When the number of installations n = 3 and the number of rotations r = 2000 rpm, it can be determined that the moving speed v = 1 m / sec. At this time, if the moving speed v is increased by 1/60 times (v = 1 m / min) without changing the thickness d, the number of installations n, and the number of rotations r, carbon deposits can be obtained by one scan by the cutting device 30. Two identical places will be hit at least 60 times.

  In the example of the cutting apparatus 30 shown in FIG. 7, it is preferable that the number n of cutting blades 35 is three. When the number n of cutting blades 35 is two or less, the cutting force of the cutting device 30 is reduced. On the other hand, when the number n of the cutting blades 35 is 4 or more, the cutting blades 35 interfere with the adjacent cutting blades 35 when they come into contact with the hard carbon, and therefore cannot fall down. Thus, the installation number n of the cutting blades 35 is determined to an appropriate number in consideration of the cutting force and the collapseability.

  In order to appropriately remove the carbon deposits 2, it is preferable to consider not only the number of hits by the cutting blade 35 but also the hitting energy (kinetic energy) of the cutting blade 35. For this reason, in addition to the above d, n, r, and v, as parameters for determining the cutting conditions, the mass of the cutting blade 35, the cutting edge rotation radius, the number of rotations, and the like are determined according to the strength or hardness of the carbon deposit 2. It is preferable to set appropriately.

  Further, as a result of the removal work using the cutting device 30 according to the present embodiment, hard carbon remains in the riser 1, but almost no soft carbon remains. Therefore, even if new soft carbon adheres to the hard carbon remaining in the riser 1 during the cycle time until the next removal operation, the soft carbon does not harden and change to hard carbon. . Therefore, if the soft carbon is appropriately removed in the next removal operation, the thickness of the hard carbon in the riser 1 does not increase rapidly. For this reason, the hardening and removal difficulty of the carbon deposit 2 in the riser 1 can be suppressed.

[6. Cutting device according to second embodiment]
Next, with reference to FIG.9 and FIG.10, the cutting device 30 which concerns on the 2nd Embodiment of this invention is demonstrated. 9 and 10 are a longitudinal sectional view and a bottom view, respectively, showing a cutting device 30 according to the second embodiment.

  As shown in FIG. 9, the cutting device 30 according to the second embodiment includes a substantially cylindrical housing 31 having a size that can be inserted into the ascending pipe 1, and a rotary drive device 32 installed in the housing 31. The rotating body 52 includes a rotating body 52 attached to the lower end of the rotating shaft 33 of the rotation driving device 32, and a plurality of retractable cutting blades 50 attached to the outer periphery of the rotating body 52. Since the housing 31 and the rotary drive device 32 are the same as those in the first embodiment, detailed description thereof is omitted.

  As shown in FIGS. 9 and 10, the rotating body 52 is pivotally supported at the tip of the rotating shaft 33 extending from the rotation driving device 32. The rotating body 52 has a substantially cylindrical shape and is rotated in the horizontal direction by the rotation driving device 32. A plurality (eight in the illustrated example) of chain-shaped cutting blades 50 are installed on the outer periphery of the rotating body 52 at equal intervals. This cutting blade 50 is comprised, for example with metal chains, such as stainless steel, One end of the cutting blade 50 is fixed to the outer periphery of the rotary body 52, and the other end is a free end.

  When the rotating body 52 is not rotating, the chain-shaped cutting blade 50 hangs downward from the rotating body 52 due to gravity. On the other hand, when the rotating body 52 rotates, the chain-shaped cutting blade 50 stands up in a substantially horizontal direction by the centrifugal force accompanying the rotation, and circulates around the rotating body 52. The cutting blade 50 of the rotary blade-like cutting tool can also be made to be tiltable by configuring the cutting blade 50 with a chain in this way.

  Next, an operation when the carbon deposit 2 in the riser 1 is removed using the cutting device 30 according to the second embodiment will be described.

  As shown in FIG. 9 and FIG. 10, the rotating device 52 is rotated by the rotation drive device 32 of the cutting device 30, and the cutting device 30 is inserted into the ascending pipe 1, and is directed from the upper end to the lower end of the ascending pipe 1. Move at a constant speed. Thus, the carbon deposit 2 attached to the inner surface of the rising pipe 1 is cut in order from the upper side of the rising pipe 1 by the chain-shaped cutting blade 50 standing up with respect to the rotating body 52, and the internal space of the rising pipe 1 is cut. Can be expanded.

  At this time, the chain-shaped cutting blade 50 stands by the centrifugal force accompanying the rotation of the rotating body 52 and abuts against the carbon deposit 2 attached to the inner surface of the rising pipe 1 for cutting. When the carbon deposit 2 is soft carbon having a strength lower than a predetermined strength, the cutting blade 50 maintains an upright state even when it comes into contact with the soft carbon, and suitably cuts and removes the soft carbon. On the other hand, when the carbon deposit 2 is hard carbon having a predetermined strength or more, the cutting blade 50 tilts in the horizontal direction (backward in the rotation direction) or the vertical direction when the cutting blade 50 comes into contact with the hard carbon. Run away without cutting.

  As described above, also when the chain-shaped cutting blade 50 according to the second embodiment is used, the retractable cutting blade 50 can be configured as in the first embodiment. The retractable cutting blade 50 can suitably cut relatively soft soft carbon, but can tilt and escape in a horizontal direction or a vertical direction without forcibly cutting hard carbon that is difficult to cut. it can. Therefore, the cutting device 30 can easily and quickly cut and remove only the relatively soft soft carbon formed on the inner peripheral side of the hard carbon without cutting the hard carbon. Therefore, since the cutting speed by the cutting device 30 (the descending speed of the cutting device 30) can be increased, the removal work of the carbon deposit 2 is completed over the entire length of the riser 1 within a limited time. it can.

[7. Carbon deposit removal cycle]
Next, a cycle for removing the carbon deposits 2 in the plurality of ascending pipes 1 using the carbon deposit removing apparatus described above will be described.

  As described above, the carbon deposit 2 attached to the inner surface of the riser pipe 1 of the coke oven 10 hardens with time and becomes difficult to be removed. Therefore, before the carbon deposit 2 hardens. It is preferable to remove. The rate at which the carbon deposit 2 hardens varies depending on various factors (for example, the temperature of the coke oven 10 and the type of coal), but generally the carbon deposit 2 adhered to the inner surface of the riser 1 is hard. It may take several months to become Therefore, if the removal work using the cutting device 30 is frequently performed and the relatively soft carbon deposit 2 before being hardened is frequently removed, the riser 1 is blocked by the carbon deposit 2. Can be prevented.

  In order to keep removing carbon deposits 2 adhering to the inner surface of the riser 1 in a cycle that does not harden, depending on the operating conditions, for example, about once per week of the riser 1 Removal work with frequency is necessary. In the conventional removal method (see FIGS. 1 and 2), since the efficiency is poor as described above, it is not possible to perform a uniform removal operation of about “once / week” per one.

  On the other hand, in the carbon deposit removing device 20 according to the present embodiment, the lightweight and compact cutting device 30 is mounted on the highly mobile moving pores, so that it can be easily installed in the rising pipe 1 of any carbonization chamber 11. It is possible to approach, and the removal work of the carbon deposit 2 can be performed with high frequency. Accordingly, each removal operation can be performed quickly and easily, and can be removed before the carbon deposit 2 is hardened in each riser 1. Moreover, the carbon deposit 2 is not left in any place on the inner surface of the riser 1 by performing the removal work by the carbon deposit removing device 20 not by automatic operation but by human observation and judgment by an operator. It is also possible to remove it uniformly.

  Below, with reference to FIGS. 11-15, the result of having examined the cycle of the removal operation | work of the carbon deposit 2 is demonstrated.

  As shown in FIG. 11, the carbon deposition rate on the riser 1 and the carbonization rate of the carbon deposit 2 depend on the operating conditions of the coke oven 10 (for example, temperature, coal charge level, coal brand, coal particle size, coal It depends on the amount of water). However, the time until the thickness of the carbon deposit 2 causes a production failure such as the clogging of the riser 1 is several days to several weeks, while the carbon deposit 2 adhered to the riser 1 is hardened. It has been found that the time required for removal becomes one month to several months.

  Therefore, as shown in FIG. 12, when considering the category with the fastest carbon deposition rate, the rate bundle condition of the removal cycle is not the hardening time of the carbon deposit 2 but the thickness of the carbon deposit 2 is a production obstacle ( This is the time until the occurrence of poor coal dry distillation gas from the ascending pipe 1). Therefore, as shown in FIG. 12, the carbon deposits 2 in the riser 1 are set to a predetermined thickness until the thickness of the carbon deposits 2 reaches a thickness (175 mm) that is a limit for maintaining the carbon production efficiency in the carbonization chamber 11. It is necessary to repeat removal at cycle time t1.

  Further, as shown in FIG. 13, the rate flux condition of the removal cycle is almost the same as in FIG. Also in this case, as shown in FIG. 13, the carbon deposit 2 in the riser 1 is reduced until the thickness of the carbon deposit 2 reaches a thickness (175 mm) that is the carbon production efficiency maintenance limit in the carbonization chamber 11. It is necessary to repeat removal at a predetermined cycle time t2 (t2> t1).

  However, for the convenience of the production cycle of the coke oven 10, the removal work time applied per riser pipe is about 15 to 20 minutes. Therefore, in the conventional removal method as shown in FIG. 1 or FIG. It is difficult to remove the entire ascending pipe 1 over the entire length of the removal operation.

  Therefore, as shown in FIG. 14, in one removal operation within a limited short time (15 to 20 minutes), the carbon deposit 2 is left behind, so the carbon deposit 2 in the remaining portion is generated. Hardening will continue. For this reason, since the carbon deposit 2 in the riser 1 is hardened, the removal capability in the subsequent removal work is further reduced, and the deposition thickness of the carbon deposit 2 increases with time. As a result, the deposit thickness of the carbon deposit 2 in the riser 1 exceeds the production efficiency maintenance limit (175 mm) and reaches a level (275 mm) at which the riser 1 (φ = 550 mm) is closed. 10 operations must be stopped and special cleaning work for the riser 1 must be carried out. Thus, in the conventional removal method, when the time for one removal operation is limited to a short time, a serious production failure such as the operation stop of the coke oven 10 may be caused.

  On the other hand, according to the carbon deposit removal method according to the present embodiment, the carbon deposit 2 can be uniformly removed over the entire length of the riser 1 and the removal speed is rapid. For this reason, as shown in FIG. 15, even if the removal operation is performed within a limited cycle time t1, the carbon deposit 2 is not left unremoved, and the thickness of the carbon deposit 2 is always set to the production efficiency maintenance limit ( 175 mm) and the occurrence of hardened portions of the carbon deposit 2 in the ascending pipe 1 can be eliminated or greatly suppressed.

  As described above, the removal work time per one riser pipe 1 is limited to a certain time (the cycle in accordance with the operation of the coke oven 10 must be observed). 1)), the carbon deposit 2 could not be removed uniformly over the entire length of the ascending pipe 1, and the removal quality was poor (see FIG. 14).

  On the other hand, in this embodiment, by introducing the carbon deposit removing device 20 described above, the soft carbon can be removed uniformly and reliably in each removal operation, so that it is possible to suppress the generation of hard carbon due to the removal. is there. Therefore, the production stop for removing the hard carbon (for example, the special cleaning shown in FIG. 14) does not occur and the production failure is not caused, so that the productivity of the coke oven 10 can be increased. Moreover, the lifetime factor (for example, the pain of the lining refractory of the riser 1) resulting from hard carbon growth can be eliminated, and the riser 1 can have a longer life. Furthermore, since a gas flow path having a stable inner diameter can always be secured in the riser 1, there is an advantage that the production and quality of coke by the coke oven 10 is stabilized. In addition, it is possible to eliminate a manpower operation that is hard, dirty, and dangerous for the operator, such as the scraping operation of FIG.

  Moreover, the removal cycle time by the removal method according to the present embodiment as shown in FIG. 15 takes into consideration the following (a) capacity condition of the carbon deposit removing device 20 and (b) external constraint conditions. To be determined.

(A) Conditions for the capacity of the carbon deposit removing device 20 The number n of the cutting blades 35 rotating in the same horizontal plane is increased, or the cutting blades 35 are installed in multiple stages in the vertical direction of the cutting device 30 and installed. By increasing n, it is possible to obtain the same removal performance in a short time (in this case, the output of the rotary drive mechanism 32 (for example, an electric motor), the lifting speed of the cutting device 30 (not the moving speed v). Etc.) etc. also need to be increased). For example, when the cutting device 30 in which the cutting blades 35 are stacked in multiple stages in the vertical direction over 3 m is used, the scanning distance by the cutting device 30 is 3 m, and the number of times the removal target is hit increases remarkably. . For example, in the device configuration of the carbon deposit removing device 20 shown in FIG. 4 or FIG. 5, the net time of the removing operation by the cutting device 30 is 12 minutes, and the movement / positioning time of the cutting device 30 with respect to each rising pipe 1 is 5 A removal cycle time t1 of about 17 to 20 minutes can be realized as ˜8 minutes. However, if the number n of cutting blades 35 is increased as described above, the net time for the removal operation can be further reduced, and the removal cycle time t1 can be shortened.

(B) External restriction condition The external restriction condition is not caused by the device configuration of the carbon deposit removing device 20 but is a time restricted by the production activity of the coke oven 10. This external constraint condition is the operating conditions of the coke oven 10 (for example, the number of carbonization chambers 11 in charge of one production mobile machine (charging vehicle 16 etc.), the production status of the coke oven 10 (operating rate, etc.) Etc.), so it cannot be said in general. However, considering the operation conditions of a general coke oven 10, the removal cycle time t1 is limited to a short time of about 10 to 20 minutes, for example. However, according to the carbon deposit removal method according to this embodiment, the carbon deposit 2 can be removed sufficiently and sufficiently within the short time.

[8. Summary]
The carbon deposit removal apparatus and method according to the present embodiment have been described above. According to the present embodiment, the carbon deposit 2 in the rising pipe 1 is cut using a simple rotary blade-like cutting tool (cutting device 30) provided with retractable cutting blades 35 and 50. This gives rise to cutting and removing hard carbon that has hardened after adhering to the inner surface of the riser 1 and is difficult to remove, and soft soft carbon before being hardened is newly formed on the inner peripheral side of the hard carbon. Can be removed quickly and efficiently. Therefore, the carbon deposits are uniformly distributed over the entire length of the single rising pipe 1 within a limited time (for example, within 15 to 20 minutes) without causing an operation failure of the coke oven 10. 2 can be removed.

  Therefore, since the removal work can be repeatedly performed at a high frequency with respect to a large number of ascending pipes 1 provided in the coke oven 10, the carbon adhering substances 2 adhering in each ascending pipe 1 are hardened before the carbon adhering substances 2 are hardened. The kimono 2 can be removed frequently. Accordingly, it is possible to prevent the carbon deposits 2 in the ascending pipe 1 from becoming hard and difficult to remove.

  Generally, the life of the riser 1 is several years (for example, 4 to 6 years). However, according to the present embodiment, the removal work for the riser 1 is performed with a short cycle time at least until the life is exhausted. Since it can be performed frequently, it is possible to avoid a production failure due to blockage of the riser 1 or the like.

  Further, the carbon deposit removing device 20 according to the present embodiment has a structure in which the light and compact cutting device 30 and a moving mechanism for moving up the furnace and ascending pipe approach having high mobility are combined. Further, the moving mechanism has a structure that does not interfere with the operation moving device (the charging vehicle 16 or the like) of the coke oven 10. The removal work of the deposit 2 can be performed easily and frequently.

  The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field to which the present invention pertains can come up with various changes or modifications within the scope of the technical idea described in the claims. Of course, it is understood that these also belong to the technical scope of the present invention.

  For example, in the above-described embodiment, the cutting blade 35 made of a rectangular metal plate or the chain-shaped cutting blade 50 is used as the retractable cutting blade, but the present invention is not limited to such an example. For example, a cutting member having an arbitrary shape and material such as a cutting blade made of a triangular metal plate or a bit-shaped cutting blade such as a cone or a triangular pyramid may be used. Further, the number and arrangement of cutting blades, the retractable structure, and the like are not limited to the example of the above embodiment, and can be arbitrarily changed in design.

DESCRIPTION OF SYMBOLS 1 Climbing pipe 2 Carbon deposit 10 Coke oven 11 Carbonization chamber 20 Carbon deposit removal apparatus 21 Carriage 22 Crane mechanism 23 Frame 30 Cutting device 31 Housing 32 Rotation drive device 33 Rotating shaft 34, 52 Rotating body 35, 50 Cutting blade 40 Moving mechanism 41 Winch 42 Support body 43 Wire 44 Pulley

Claims (6)

Cutting means inserted into the riser pipe of the coke oven and cutting carbon deposits adhered to the inner surface of the riser pipe;
Moving means for moving the cutting means in the vertical direction in the riser;
With
The cutting means is
A rotating body supported by a rotating shaft extending in a vertical direction;
A rotation drive device that rotates the rotating body via the rotating shaft;
A retractable cutting blade provided on the outer periphery of the rotating body;
A carbon deposit removing device comprising: The retractable cutting blade is
Standing up by centrifugal force accompanying the rotation of the rotating body, cutting the carbon deposits less than a predetermined strength,
2. The carbon deposit removing device according to claim 1, wherein the carbon deposit removing device tilts when it comes into contact with the carbon deposit having the predetermined strength or more. 3. The carbon deposit is
Hard carbon adhered to the inner surface of the riser and having a porosity of less than 40%;
Soft carbon adhering to the inner peripheral side of the hard carbon and having a porosity of 40% or more;
Including
The retractable cutting blade is
When contacting the soft carbon, the soft carbon is cut while standing,
3. The carbon deposit removing device according to claim 1, wherein the carbon deposit removing device tilts so as to escape from the hard carbon when contacting the hard carbon. 4. In the carbon deposit removal method for removing carbon deposits attached to the riser pipe of the coke oven,
A rotating body supported by a rotating shaft extending in the vertical direction, a rotation driving device that rotates the rotating body via the rotating shaft, and a retractable cutting blade provided on the outer periphery of the rotating body. A carbon deposit removing method, wherein a cutting means is inserted into the rising pipe and moved in the vertical direction, and the carbon deposit is cut over the entire rising pipe by the cutting blade. The retractable cutting blade is
Standing up by centrifugal force accompanying the rotation of the rotating body, cutting the carbon deposits less than a predetermined strength,
5. The carbon deposit removing method according to claim 4, wherein the carbon deposit is tilted when it comes into contact with the carbon deposit having a predetermined strength or more. The carbon deposit is
Hard carbon adhered to the inner surface of the riser and having a porosity of less than 40%;
Soft carbon adhering to the inner peripheral side of the hard carbon and having a porosity of 40% or more;
Including
The retractable cutting blade is
When contacting the soft carbon, the soft carbon is cut while standing,
The method for removing carbon deposits according to claim 4 or 5, wherein when contacting the hard carbon, the hard carbon is tilted so as to escape from the hard carbon.

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