JPH1054671A - Repair equipment and repair method for high temperature furnace - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To reliably position the center of repair of a high-temperature furnace wall, the focus of imaging means for observing the state of the furnace wall, and the center of spraying of repair material spraying means for spraying repair material to a damaged part. And a repair device for a high-temperature furnace having an inexpensive and simple structure capable of reliably performing repair of a damaged portion and preventing the observation means from being unusable due to rebound of repair material at the time of repair. Provide repair methods. SOLUTION: A protection tube 11 which can be driven into and out of and rotates in a high-temperature furnace 14 and has an imaging window 11a and a material discharge window 11b provided at different ends at different phase angles, and is disposed in the protection tube 11. Then, the imaging means 12 for imaging the furnace wall 26 in the high-temperature furnace 14 from the imaging window 11a, and the repair target part 25 which is disposed in the protective tube 11 and is a damaged part of the furnace wall 26 from the material release window 11b. Repair material spraying means 13 for discharging the repair material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-temperature furnace for repairing a damaged portion such as a crack or peeling of a furnace wall of a high-temperature furnace used in a high-temperature region such as a blast furnace, a steelmaking furnace, a coke oven (or a portion to be repaired). The present invention relates to a repair device and a repair method.

[0002]

2. Description of the Related Art Conventionally, in order to repair a furnace wall of a high-temperature furnace and extend its life, Japanese Patent Publication No. 5-17277, Japanese Patent Publication No. 5-65553, Japanese Patent Publication No. 3-9955,
Japanese Patent Application Laid-Open No. Hei 5-31173 discloses that a furnace wall of a high-temperature furnace is observed using an imaging means such as a television camera or an optical fiber, and a repair material such as mortar or a sprayed material is discharged to a damaged portion found by the observation. A repair technique is disclosed.

[0003]

However, the technique described in the above publication still has the following problems. In the method described in Japanese Patent Publication No. Hei 5-17277 and Japanese Patent Publication No. Hei 5-65553, as shown in FIG. 5, the tip of an optical fiber 50 for observing a furnace wall 59 of a coke oven and the furnace wall
The tip of the repair material spray nozzle 51 for spraying the repair material to the damaged portion 9 is directed upward and downward with the front end facing the viewing window 52a formed at the lower end of the protective tube 52.

However, if the separation distance L between the furnace wall 59 and the protective tube 52 changes, it becomes difficult to align the damaged portion of the furnace wall 59, the focal position of the optical fiber 50, and the spraying center of the repair material spraying nozzle 51. However, there is a problem that the repair becomes difficult. In addition, since the tip of the optical fiber 50 and the tip of the repair material spray nozzle 51 are directed toward the same viewing window 52a, the repair material is sprayed toward the damaged portion even if the repair material is sprayed even if it is separated above and below. The rebound at that time tends to adhere to the tip of the optical fiber 50, which causes a problem that the imaging quality is deteriorated and the repair material is damaged by thermal contraction.

In Japanese Patent Publication No. 3-9955,
As shown in FIG. 6, there has been proposed a device for repairing a damaged portion by making the distal end portion of the protective tube 53 rotatable. In this case as well, the head of the television camera 54 and the
Since the tip of the repair material spraying nozzle 55 is spaced apart in the same direction in the radial direction, the furnace wall 59 is provided in the same manner as described above.
When the separation distance between the furnace tube 59 and the protection tube 53 changes, there is a problem that it is difficult to align the damaged portion of the furnace wall 59, the focal point of the television camera 54, and the spraying center of the repair material spraying nozzle 55.

Further, as described above, since the head of the television camera 54 and the tip of the repair material spraying nozzle 55 are directed in the same direction, even if they are spaced apart from each other in the radial direction, the bounce at the time of repair. Is attached to the head of the television camera 54. Further, Japanese Unexamined Patent Publication No.
In the apparatus described in Japanese Patent No. 311733, as shown in FIG.
7 and the tip of the repair material spraying nozzle 58 are separated from each other for repair. However, as described above, if the separation distance L between the furnace wall 59 and the protective tube 56 changes, the damaged portion of the furnace wall 59, the television camera 57 However, there is a problem that it is difficult to align the focus of the repair material and the spraying center of the repair material spraying nozzle 58.

[0007] The present invention has been made in view of such circumstances, and includes a damaged portion of a furnace wall of a high-temperature furnace, a focus of imaging means for observing the state of the furnace wall, and a repair material spraying method for spraying a repair material onto the damaged portion. It is possible to reliably perform the alignment of the spraying center of the means, to reliably repair the damaged portion, and to prevent the observation means from being unusable due to the rebound of the repair material at the time of repair. It is an object of the present invention to provide a repair apparatus and a repair method for a high-temperature furnace having a simple structure.

[0008]

According to the present invention, there is provided a semiconductor device comprising:
The repair apparatus for a high-temperature furnace described above is capable of moving back and forth and rotating in the high-temperature furnace, and further has a protection tube provided with an imaging window and a material discharge window at different ends at different phase angles, and is disposed in the protection tube. Imaging means for imaging the furnace wall in the high-temperature furnace from the imaging window, and releasing the repair material from the material release window toward the repair target site, which is a damaged portion of the furnace wall, disposed in the protective tube. Repairing material spraying means.
The repair apparatus for a high-temperature furnace according to claim 2 is the repair apparatus for a high-temperature furnace according to claim 1, wherein the different phase angles are within a range of 90 to 180 ° about the axis of the protective tube.
The repair apparatus for a high-temperature furnace according to claim 3 is the repair apparatus for a high-temperature furnace according to claim 1 or 2, wherein an image captured by the imaging unit is digitally processed to obtain a centroid of the repair target portion. There is arithmetic means for calculating the spray center of the repair material spray means.

According to a fourth aspect of the present invention, there is provided a method for repairing a high-temperature furnace, comprising: a protective tube which can be moved in and out of the high-temperature furnace and can be driven to rotate; An imaging means arranged in the protective tube and imaging the furnace wall in the high-temperature furnace from the imaging window; and a repair target site which is arranged in the protective tube and is a damaged portion of the furnace wall from the material discharge window. Repairing material spraying means for discharging the repairing material toward, and calculating means for digitally processing the image taken by the imaging means to obtain the centroid of the repair target portion, and calculating the spraying center of the repairing material spraying means. A method of repairing the high-temperature furnace using a repair device having the repair device, wherein the image captured by the imaging unit is digitally processed, and the centroid of a repair target portion that is an extremely bright portion or an extremely dark portion is provided. Calculated, seeking spraying center of the repair material spraying means, and forward and backward according to the rotation and require the protection tube, performs the spraying of repair material towards the means blowing the repair material to the centroid. The repair method for a high-temperature furnace according to claim 5 is the method for repairing a high-temperature furnace according to claim 4, wherein after the repair material is sprayed by the repair material spraying means, the protective tube is rotated again to spray the repair material. Image the furnace wall or the furnace wall around it after performing, repeat the process of detecting and repairing the next repair target site,
The high-temperature furnace is repaired.

Here, the high-temperature furnace refers to a blast furnace, a steelmaking furnace, a coke furnace, a heating furnace, a heat treatment furnace, etc., which performs smelting, refining, heat treatment, and the like. In addition, the protective tube refers to a tube capable of suppressing damage, erosion, and the like even when inserted into a high-temperature furnace, and a water-cooled tube or the like is usually used. Further, a refractory layer may be provided on the surface of the protection tube. The imaging window and the material discharge window provided in the protection tube are arranged around the axis of the protection tube.
It is desirable that the phase angles be different from each other in the range of 0 to 180 ° so that they are spaced apart from each other. This is because, when the phase angle is less than 90 °, the repair material easily rebounds and adheres to the imaging means arranged in the imaging window, and the phase angle is 180 °.
This is because the repair material is likely to adhere even in the case of exceeding the above.

The imaging window and the material discharging window may be provided with a hood for preventing the rebound material from adhering to the material, and the imaging window may be provided with a transparent or translucent glass plate or an infrared cutoff filter. May be provided. Also,
The imaging means refers to a television camera, a condenser lens, and an optical fiber for transmitting an image formed by the condenser lens. The repairing material spraying means refers to a means for spraying while mixing powdery and granular cement and water, a means for spraying powdery and mortar, and the like.

In addition, a mixture of a metal oxide powder and a glass raw material powder, a mixture of a metal oxide powder to which a metal powder is further added, and the like are sprayed. What is sprayed while melting with a flame can also be used. In addition, the repair material spraying means may be provided by providing a tank for storing the repair material in the protective tube, and supplying a liquid for pumping such as water or a gas for pumping such as air from the outside to perform spraying. The repair material may be supplied together with the liquid for pumping or the gas for pumping.

Further, in the repairing apparatus of the present invention, the light guide for illuminating the inside of the high-temperature furnace brightly is provided in consideration of the case where the inside of the high-temperature furnace is dark, such as when coke is kilnized. Alternatively, a laser beam irradiation unit or the like may be provided. Further, in the repairing apparatus of the present invention, the first movable trolley moving on the rail laid in the direction of the furnace on the coke oven, and the rail laid in the furnace length direction on the upper surface of the first movable trolley. A traveling vehicle having a moving second traveling vehicle and a traveling vehicle having various steering functions may be provided. In the repair method of the present invention, for example, when repairing a coke oven, it can be performed not only when carbonizing coal but also when firing coke.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention.

First, an overall configuration of a high-temperature furnace repair apparatus 10 according to an embodiment of the present invention will be described with reference to FIGS. As shown in the figure, a high-temperature furnace repair apparatus 10 according to the present embodiment is capable of moving forward and backward into a coke oven 14 which is an example of a high-temperature furnace, and capable of being driven to rotate about its axis, and having an end portion thereof. Are imaging windows 11 at different phase angles
a protective tube 11 provided with a and a material discharge window 11b, an imaging means 12 arranged in the protective tube 11, and imaging the furnace wall 26 in the coke oven 14 from the imaging window 11a; And a repair material spraying means 13 for discharging the repair material from the material discharge window 11b toward the repair target portion of the furnace wall 26. Hereinafter, these will be described in detail.

First, an overall configuration of a coke oven 14, which is an example of a high-temperature oven, will be described with reference to FIG. As shown in FIG. 1, the coke oven 14 is provided with a carbonization chamber 1 for carbonizing coal.
4a and a combustion chamber 14b for heating the carbonization chamber 14a to a high temperature are alternately arranged in the furnace length direction, and a heat storage chamber (not shown) for preheating fuel or air combusted in the combustion chamber 14b is provided below these. ) Is arranged in a well-known structure.
A coal inlet 14c is opened in the upper part of the carbonization chamber 14a, and an inspection port 14d is opened in the upper part of the combustion chamber 14b. The protection tube 11 can be put in and out of the combustion chamber 14b through the inspection port 14d. I have.

Next, a specific configuration of the high-temperature furnace repair apparatus 10 according to the present embodiment will be described with reference to FIGS. As shown in FIG. 1, the protection tube 11 has a long triple-layered hollow cylindrical shape made of a heat-resistant steel plate such as a stainless steel plate (see FIG. 2), and is cooled by a cooling water supply unit 15. Water is allowed to reflux. The electric motor 16 is an example of a rotary drive unit connected to the upper end of the protective tube 11, and is driven to rotate about an axis thereof by an electric motor 16, and can be moved up and down by an elevating unit 17 disposed on the coke oven 14. It has become.

As shown in FIG. 1, the elevating means 17 comprises a long screw rod 17a having the same length as or longer than the protective tube 11, and both ends of the screw rod 17a. A shaft support 17b rotatably supported and a screw rod 1
An electric motor 17c, which is an example of a rotary driving means, connected to one end of 7a, and a connecting portion 17d, one end of which is screwed to the screw rod 17a and the other end of which is fixed to the upper end of the protective tube 11. Have. The upper shaft support 17b
Are supported by columns (not shown).

As shown in FIG. 2, a television camera 12, which is an example of an image pickup means, is fixedly arranged facing downward in the protective tube 11, and is inclined downward by about 45 °. Through the mirror 18 and the imaging window 11a, the furnace wall 26 can be imaged as seen from the arrow in the figure. The image taken by the television camera 12 is formed on a monitor television 19 as shown in FIG. 1, so that the operator can observe the condition of the furnace wall 26 online. On the other hand, the data is also transmitted to the arithmetic means 20, where the centroid of the repair target portion is obtained by digital processing, and the spraying center of the repair material spraying means 13 can be obtained.

Then, as shown in FIG.
The control unit 24 controls the electric motors 16 and 17c based on the spraying center of the repair material spraying means calculated by the above. The control unit 24 also controls the cooling water supply unit 15 and the repair material supply unit 22 described later.

As shown in FIG. 2, the protection tube 11 has an image pickup window 11a through the imaging window 11a centered on the axis of the protection tube 11.
A repair material which communicates with a repair material spraying nozzle 13 which is an example of a repair material spraying means disposed at a material discharge window 11b provided at a position deviated by 0 °, and whose base end side communicates with the repair material supply means 22. A supply pipe 21 is arranged.

The central axis of the imaging window 11a coincides with the central axis of the material ejection window 11b. That is, the distance of each central axis from the lower end of the protection tube 11 is the same (L ₁
= L ₂ ). Further, hoods 23, 23a for preventing the amount of the repair material from rebounding are provided in the imaging window 11a and the material discharge window 11b.

Next, a method of repairing a coke oven using the high-temperature furnace repair apparatus 10 configured as described above will be described with reference to FIGS. First, the electric motor 17c is driven to put the protective tube 11 into the combustion chamber 14b of the coke oven 14, and then the electric motor 16 is driven so that the imaging window 11a is directed toward the furnace wall 26 and the television camera 12 Focus on. Next, the protection tube 11 is placed above and below the furnace wall 26,
Move the furnace wall 2 with the TV camera 12
6 is imaged. When an extremely bright or extremely dark portion of the furnace wall 26 is found on the monitor television 19, the adjustment is performed so that the portion falls within the angle of view of the television camera 12, that is, within the imaging range.

Next, the television camera 12 captures the image and stores the image, and converts the stored image signal into a monochrome image with a brightness of 256 gradations. Among the indices of the intensity of the converted image of 0 to 255, for example, 50
% (128) is set as a threshold, and a brighter region S is set as the repair target portion 25 (see FIG. 3). Since the pixel area (f (i, j)) having the indices of the indices 128 to 255 is distributed in the repair target part 25 of the area S, the following equations (1) and (2) are used. Repair target site 2
The center of gravity of 5 is calculated.

[0025]

(Equation 1)

[0026]

(Equation 2)

Next, the image of the protection tube 11 is taken such that the center of gravity (X1, Y1) of the repair target part 25 calculated by the above equations (1) and (2) becomes the center of the angle of view of the television camera 12. The position of the window 11a is adjusted. Then, after aligning the center of gravity of the repair target portion 25 with the center of the angle of view of the television camera 12, the protective tube 11 is rotated by 180 ° about the axis thereof, and the repair material is sprayed as it is to thereby repair the repair target portion 25.
Perform repairs.

At this time, the imaging window 11a and the material discharge window 11
Since b is in the opposite direction by 180 °, it is possible to prevent the mirror 18 and the head portion of the television camera 12 from being stained such as rebound (or splash) of the repair material. In addition, since the repair material is sprayed toward the center of gravity of the repair target portion 25, for example, by using the diffusion of the repair material, the repair material is spread over the entire repair target portion 25 as compared with a case where the end of the repair target portion 25 is sprayed. Reliable repair can be performed without delay and in a short time.

Further, since the imaging center of the imaging window 11a and the spraying center of the material discharge window 11b are coaxial, the center of gravity of the repair target portion 25 calculated by the arithmetic means 20 (or the angle of view of the television camera 12) The center) and the center of the spraying of the repair material spray nozzle 13 can be prevented from being out of order, and reliable repair can be performed. After that, the protective tube 11 is again rotated by 180 ° to take an image of the sprayed furnace wall 26 or the vicinity thereof, and when an extremely bright portion or an extremely dark portion is found, the same operation as described above is repeated. Perform repairs.

As described above, in the high-temperature furnace repair apparatus 10 and the repair method according to the present embodiment, the imaging window 11a and the material discharge window 11b of the protection tube 11 are moved in the axial direction by 18 degrees.
Since the hoods 23 and 23a are provided in addition to being spaced apart from each other at a position deviated by 0, when the repair material is sprayed on the repair target portion 25, the rebound may contaminate the imaging system such as the television camera 12 and the mirror 18. Can be reliably prevented.

Further, since the repair material is sprayed toward the center of gravity of the repair target portion 25, reliable repair can be performed on the entire repair target portion uniformly and in a short time. Furthermore,
Since the imaging center of the imaging window 11a and the blowing center of the material discharge window 11b are on the same coaxial line, reliable repair can be performed.

Conventionally, as shown in FIG. 4, the cracks generated on the furnace wall 26 of the coke oven branch off from the combustion chamber 14b toward the carbonization chamber 14a. Although repairing from the carbonization chamber 14a side required a large amount of repair time as in the apparatus described in Japanese Patent No. 9955, in the present embodiment, the repair material is sprayed from the combustion chamber 14b side onto the furnace wall 26 of the coke oven 14. To repair
Repair time can be extremely reduced, and workability can be improved.

When repairing from the carbonization chamber 14a side,
Since carbon adhered to the furnace wall 26 and the cracks, it was necessary to burn and remove the carbon once with a burner or the like. However, this burning and removing operation can be omitted, the repair time is further shortened, and the workability is improved. Can be improved. Furthermore, after the repair, it was necessary to remove the irregularities on the furnace wall in consideration of the coke kiln stocking, but this can also be omitted.

Therefore, the coke oven 14 is subjected to a heat cycle in which the temperature is raised to a high temperature of about 1,000 degrees or more when the coal is carbonized, and the temperature is lowered to a low temperature close to the normal temperature when the produced coke is pushed out. Accordingly, not only is the furnace wall 26 easily damaged, such as peeling or cracking, but also the expansion pressure at which the coal expands when carbonizing the coal, and the damage caused by friction with the coke when the coke is kilnized. However, there is a problem that the service life is shortened. However, this problem can be suppressed and the service life can be extended.

As described above, the present invention has been described with reference to one embodiment. However, the present invention is not limited to the above-described embodiment, and the scope of matters described in the claims is not limited. This also includes other embodiments and modifications that can be considered. For example, damage to the furnace wall is likely to occur mainly at joints, so the joint positions are stored in advance,
If the elevating and lowering means and the rotary driving means are driven so that the imaging center runs on the ground, the repair time of the furnace wall can be greatly reduced.

In this embodiment, the television camera 12 is installed in the protection tube 11. However, an optical fiber (not shown) is provided in the protection tube 11, and the television camera 12 is provided at the base end of the protection space 11. The camera 12 may be installed to transfer the image and capture the image. In the present embodiment, the TV camera 12
The image signal transmitted from is digitally processed on the basis of the threshold of 50% (128) for the index of intensity 0 to 255, but is not limited thereto, and various values may be used as the threshold. It is possible.

[0037]

As apparent from the above description, in the repair apparatus for a high-temperature furnace according to the first to third aspects, the imaging window and the material discharge window of the protective tube are separated from each other by changing the phase angle.
With an inexpensive and simple structure, it is possible to prevent the rebound when the repair material is sprayed on the repair target portion from adhering to the imaging means and deteriorating the imaging quality. Therefore, the repair target portion of the furnace wall can be confirmed and repair can be surely performed, and the life of the high-temperature furnace can be extended.

In particular, in the apparatus for repairing a high-temperature furnace according to the second aspect, since the imaging window and the material discharge window have different phase angles in a range of 90 to 180 ° around the axis of the protective tube, the bounce-back occurs. Can be reliably suppressed,
As described above, the repair target portion of the furnace wall is reliably repaired, and the life of the high-temperature furnace can be extended. The repair apparatus for a high-temperature furnace according to claim 3, further comprising an arithmetic unit for digitally processing an image taken by the imaging unit to obtain a centroid of a repair target portion and obtaining a spray center of the repair material spraying unit. By using the diffusion when spraying, the entire area to be repaired can be sprayed evenly,
By performing reliable repair, the life of the high-temperature furnace can be extended as described above.

In the method for repairing a high-temperature furnace according to claims 4 and 5, the image picked up by the image pickup means is digitally processed so that the centroid of the part to be repaired which is an extremely bright part or an extremely dark part is determined. Calculate and find the spraying center of the repair material spraying means, rotate the protective tube and advance or retreat as necessary, and spray the repair material toward the center of the repair material spraying means. By using the diffusion at the time of spraying, the entire area to be repaired can be sprayed evenly, the repair can be performed reliably, and the life of the high-temperature furnace can be extended as described above.

In particular, in the method for repairing a high-temperature furnace according to the fifth aspect, after the repair material is sprayed by the repair material spraying means, the protective tube is rotated again to perform the spraying. The process of imaging the wall or the furnace wall around it, detecting the next part to be repaired, and performing the repair is repeated, and the high-temperature furnace is repaired, so that reliable repair is performed to extend the life of the high-temperature furnace. be able to.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an entire configuration of a high-temperature furnace repair device according to an embodiment of the present invention.

FIG. 2 is an explanatory view of a protective tube of the repair device for the high-temperature furnace.

FIG. 3 is an explanatory diagram of a repair target portion.

FIG. 4 is an explanatory diagram of cracks generated in a furnace wall of a coke oven.

FIG. 5 is an explanatory view of a conventional coke oven wall repair method.

FIG. 6 is an explanatory diagram of a conventional coke oven wall remote repair device.

FIG. 7 is an explanatory view of a conventional coke oven wall repair apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Repair apparatus of high-temperature furnace 11 Protective tube 11a Imaging window 11b Material discharge window 12 TV camera (imaging means) 13 Repair material spray nozzle (repair material spray means) 14 Coke oven (high temperature furnace) 14a Carbonization chamber 14b Combustion chamber 14c Coal equipment Inlet 14d Inspection port 15 Cooling water supply means 16 Electric motor (rotation driving means) 17 Elevating means 17a Screw rod 17b Shaft support 17c Electric motor (rotation driving means) 17d Connecting part 18 Mirror 19 Monitor television 20 Calculation means 21 Repair material supply pipe Reference Signs List 22 repair material supply means 23 hood 23a hood 24 control unit 25 repair target part 26 furnace wall

Claims (5)

[Claims] 1. A protection tube which is movable in and out of a high-temperature furnace and can be driven to rotate, and further has an imaging window and a material discharge window provided at different ends at different phase angles; Imaging means for imaging a furnace wall in the high-temperature furnace from a window; and a repair material sprayer disposed in the protective tube and discharging a repair material from the material discharge window toward a repair target site which is a damaged portion of the furnace wall. Means for repairing a high-temperature furnace. 2. The high-temperature furnace repair apparatus according to claim 1, wherein the different phase angles are within a range of 90 to 180 degrees around an axis of the protection tube. 3. An arithmetic unit for digitally processing an image captured by the image capturing unit to obtain a centroid of the repair target portion, and for determining a spraying center of the repair material spraying unit. The high-temperature furnace repair device according to claim 1 or 2. 4. A protective tube provided with an imaging window and a material discharge window at different ends at different phase angles and capable of being driven into and out of and rotating in a high-temperature furnace. Imaging means for imaging a furnace wall in the high-temperature furnace from a window; and a repair material sprayer disposed in the protection tube and discharging a repair material from the material discharge window toward a repair target site which is a damaged portion of the furnace wall. The high-temperature furnace using a repair device having means for repairing the image picked up by the image capturing means and digitally processing the image taken by the image capturing means to obtain the centroid of the repair target portion, and calculating the spraying center of the repair material spraying means. The digital image processing of the image taken by the imaging means, calculate the centroid of the repair target portion is an extremely bright portion or extremely dark portion, the repair material spraying means Spraying seeking center, forward and backward depending on the rotational and require the protection tube method of repairing high-temperature furnace, wherein the means blowing the repair material to perform the spraying of the repair material toward the centroid. 5. After the repair material is sprayed by the repair material spraying means, the protective tube is rotated again,
An image of the furnace wall after spraying or the furnace wall around the furnace, and a step of detecting and repairing the next repair target portion is repeated to repair the high-temperature furnace. 4. The method for repairing a high-temperature furnace according to 4.