JP3156901B2 - Method and apparatus for repairing the furnace wall below the coal mouth of the coke oven - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for repairing a furnace wall in which a damaged portion of a wall of a coking chamber below a coal mouth of a coke oven is repaired hot.

[0002]

2. Description of the Related Art In a coke oven furnace, a heat storage chamber is provided at a lower portion of a furnace body, and a carbonization chamber and a combustion chamber are alternately arranged at an upper portion thereof. Fuel gas and air (in the case of rich gas, only air) are preheated in the heat storage chamber, heat is recovered in the adjacent heat storage chamber after combustion, and then discharged through the flue. The coal charged into the coking chamber is carbonized by indirect heating through the furnace walls from both combustion chambers to coke. Most of the room-type coke ovens are made of silica bricks and clay bricks, and some of them are insulated bricks and red bricks.

[0003] However, due to the mechanical external force at the time of leaving the coke kiln, the thermal stress, the action of charged coal moisture, and the like, each part of the coke oven furnace is damaged during its long-term use. Since the action based on the above factors concentrates on the carbonization chamber wall, damages such as breakage of joints, generation of cracks, lack of bricks, and depression are likely to occur. Of the coal chamber walls, especially the lower part of the coal mouth is subjected to the impact and sudden temperature change due to the contact with the normal-temperature coal that falls by gravity from the hopper of the coal car after leaving the kiln. Joint breakage, joint opening, and cracking are remarkable compared to the furnace wall in the middle of the mouth. Also, the furnace wall near the kiln opening is supercooled due to contact with the outside air because the furnace lid is removed when the coke kiln is taken out, so that joint breakage, joint opening, and cracking are more remarkable than in the central part.

When such damage occurs, inflow of the generated coke oven gas from the carbonization chamber to the combustion chamber causes incomplete combustion, causing pollution problems due to black smoke and productivity due to a local decrease in the temperature of the combustion chamber. This leads to problems such as a decrease in temperature and an increase in the amount of pyrolytic carbon adhering to the furnace wall, resulting in shortening of the furnace life. Therefore, if the carbonization chamber wall is damaged, the damaged part is repaired by mortar or thermal spray repair, or if the damage is large, bricks that require high repair costs are replaced. However, when repairing the furnace wall near the kiln mouth, remove the furnace lid and manually operate the mortar spray nozzle or spray nozzle, and repair it while visually checking the damaged wall surface from the kiln mouth because it is close to the kiln mouth. However, since the mortar spray nozzle or thermal spray nozzle is inserted from the top of the coal filling port and repaired while visually checking from the coal filling port, the lower part of the coal filling port should be along the joint if not a very skilled person. Therefore, it is difficult to move the mortar spray nozzle or the spray nozzle.

Conventionally, as a method of inspecting a furnace wall of a coke oven or a method of repairing the same, for example, a lance having an optical system including an optical fiber at a tip end is inserted into a coke oven carbonization chamber or a combustion chamber to absolutely cover the wall. A method of scanning a wall surface in association with a position, observing each position of the wall surface of the carbonization chamber or combustion chamber to detect a damaged portion, and storing observation data of the wall surface together with the absolute position of the wall surface in a computer No. 58-206681), a heat-resistant protective tube provided with an optical fiber or a television camera is inserted into a carbonization chamber or a combustion chamber to detect a damaged portion of the wall of the carbonization chamber or the combustion chamber outside the furnace, and the inside of the protection tube is detected. A method of spraying a repair material to a damaged wall portion from a repair material spray nozzle to be disposed (Japanese Patent Publication No. 5-17277), And a method of repairing a damaged portion of the furnace wall by using an observation device, measuring a distance between the damaged portion of the furnace wall and the spray gun, and controlling the distance to be a predetermined optimum distance (Japanese Patent Application Laid-Open No. 60-17689) and the like.

[0006] Furnace wall repair devices include flammable gas,
A spraying burner is detachably provided at one end of a water-cooled long cylinder in which supply pipes for oxygen and refractory powder are inserted, and an operation handle is fitted at the other end, and the water-cooled long cylinder can be rolled on a support frame. (Japanese Utility Model Laid-Open Publication No. 52-36703), a spray gun for spraying an amorphous refractory into a cooling case on a damaged portion of a furnace wall, and a furnace wall damaged. A television camera for projecting a part, a furnace interior-containing head part in which a range finder for measuring the distance between the damaged part of the furnace wall and the spray gun is also provided, and an observation device capable of observing an image obtained by the television camera outside the furnace. And a device provided with a moving mechanism for moving the furnace interior head in three axial directions based on the measured value of a distance meter (Japanese Patent Application Laid-Open No. 60-176).
No. 89), an apparatus in which a spraying burner is mounted on a bogie so as to be able to move up and down and move forward and backward, and the spraying burner is suspended and supported by a chain through a hoisting machine from a charging port at the furnace top (actually open). (Japanese Patent Application Laid-Open No. 2-159592), a device provided with a spraying burner and a surveillance camera, etc. necessary for thermal spraying in a water-cooled box, and detachably provided at the end of a boom (Japanese Patent Application Laid-Open No. 2-99592). A water-cooled box equipped with a camera and a spraying burner, a long beam detachably mounted, a wheel running on a rail on the middle work floor, and a turning frame of the long beam support frame portion can be freely moved up and down. Apparatus mounted on a trolley so that forward / backward movement and inclination angle can be freely selected (Japanese Patent Laid-Open No. 2-9 / 1990)
No. 9589), a guide rail is provided so as to be tiltable on a vertically movable and turnable base provided on a traveling vehicle,
An apparatus in which a lance holder moving along the guide rail, a spraying lance which is attached to the lance holder so as to be freely extended, and a repair surface monitoring camera is provided on the lance holder (Japanese Patent Application Laid-Open No. 4-32690). Many suggestions have been made.

[0007]

SUMMARY OF THE INVENTION The above-mentioned JP-A-58-20
No. 6681, Japanese Patent Publication No. 5-17277, Japanese Unexamined Patent Publication No.
The inspection method and the repair method disclosed in Japanese Patent Publication No. 0-17689 disclose that when the observation data by the optical system is all stored in the computer, the capacity of the computer becomes extremely large. During the repair of the furnace wall, the optical system is almost useless due to dust, fumes and high-temperature flames for spraying the repair material, and the repair is substantially an intuitive work, and the repair material spray nozzle Are difficult to move along the joints.

In the apparatus disclosed in Japanese Utility Model Laid-Open Publication No. 52-36703, a worker operates an operation handle while visually observing a damaged portion of a furnace wall to form a thermal spray provided at one end of a water-cooled long cylindrical body. It is necessary to repair the damaged part with a burner, and it is difficult to move the repair material spray nozzle along the joint of the furnace wall below the coal mouth. The devices disclosed in JP-A-60-17689 and JP-A-61-159345,
During furnace wall repair, the optical system is of little use due to dust, fumes and high-temperature flames for spraying the repair material, making it difficult to move the repair material spray nozzle along the joint. Further, JP-A-2-99592, JP-A-2-99592
In the apparatus disclosed in Japanese Patent No. 99589, it is necessary for an operator to operate a boom having a built-in thermal spray burner while monitoring the image of a surveillance camera, and to move the repair material spray nozzle along the joint for the same reason as described above. Is difficult. Furthermore, the method disclosed in JP-A-4-32690 requires the operator to operate the spraying lance while the operator monitors the image of the surveillance camera as in JP-A-2-99589, for the same reason as described above. Therefore, it is difficult to move the repair material spray nozzle along the joint. In addition, special fair 5
The lance device disclosed in Japanese Patent No. 17277 has a drawback that it is not suitable for repairing a furnace wall at a lower portion of a coal mouth where it is difficult to visually check the wear state of the furnace wall.

SUMMARY OF THE INVENTION An object of the present invention is to repair a furnace wall below a coal mouth, which is difficult to see with the naked eye, even if dust, smoke and a high-temperature flame for spraying the repair material make the monitoring system of the optical system useless. Another object of the present invention is to provide a furnace wall repairing device at a lower part of a coke oven charging port which can accurately move a repairing material spray nozzle along a joint.

[0010]

Means for Solving the Problems The present inventors have intensively studied and studied to achieve the above object. As a result, in order to move the repair material spray nozzle along the horizontal horizontal joint of the furnace wall below the coal filler port, a repair lance with a repair material spray nozzle at the tip is inserted from the coal filler port and the coal filler port is inserted. When the upper end is tilted along the copying machine centering on the upper part of the mouth, the repair material spray nozzle can be moved horizontally along the joint,
In addition, the initial alignment of the repair material spray nozzle to the joint is performed by inserting a surveillance lance equipped with a TV camera from the coal entrance and watching the monitor TV connected to the TV camera. Once completed,
Thereafter, it was determined that if the repair lance is tilted along the copying machine, the repair material spray nozzle moves up and down sequentially while moving horizontally along the joints, and has reached the present invention.

That is, according to the present invention, a repair lance having a repair material spraying nozzle is inserted from a coal charging port to a tip in repairing a furnace wall joint below a coal coke charging port, and the repair lance is positioned above the coal loading port. the elevator, tiltably clamped, engaged in the groove profiling the top of the lance holder than the clamp position of the repair lance by Rukoto moved <br/> along the groove profiling the lance holder, repair materials repair lance A method for repairing a furnace wall at a lower portion of a coke oven charging port, characterized in that a spray nozzle is horizontally moved for each step of a furnace wall joint.

In a furnace wall repairing device below a coke oven charging port, a copying machine which can be mounted on a coke oven having a clamping mechanism for vertically moving and tilting a copying lance and a repairing lance, A repair lance having a repair material spray nozzle, a surveillance lance having an optical fiber or a TV camera, a lance holder for engaging the scanning groove with a portion above the repair lance at a clamp position, and connecting to the optical fiber or the television camera of the surveillance lance. An apparatus for repairing a furnace wall at a lower part of a coke oven charging port, comprising a monitor television.

[0013]

According to the present invention, a repair lance having a repair material spraying nozzle is inserted from a coal loading port to a tip thereof, and an upper portion of the coal loading port of the repair lance is clamped so as to be vertically movable and tiltable. If the upper lance holder is engaged with the profile groove and the lance holder is moved along the profile groove, the repair material spray nozzle of the repair lance moves horizontally at every step of the furnace wall joint, and the repair target If the joints and the repair material spray nozzle are matched at the beginning, the repair material can be accurately prepared for each stage of the furnace wall joint at the lower part of the coal seam without monitoring the spraying condition of the repair material with a monitoring camera. Can be sprayed.

Further, a copying machine which can be mounted on a coke oven furnace having a clamp mechanism for vertically and tiltably clamping the copying machine and the repair lance, a repair lance having a repair material spraying nozzle at a tip, an optical fiber or By providing a surveillance lance with a TV camera, a lance holder that engages the scanning groove above the repair lance's clamp position, and a monitor television that connects to the optical fiber of the surveillance lance or to the television camera, After inserting the repair lance and the monitoring lance from the filler port, clamping the repair lance by the clamp mechanism as the initial alignment of the nozzle, engage the lance holder with the copying groove of the copying machine, The repair material spray nozzle position is matched with the joint of the furnace wall to be repaired while watching the monitor television. After that, if the lance holder is moved along the profile groove, the repair material spray nozzle moves horizontally at each step of the furnace wall joint, and repairs the furnace wall joint at the bottom of the coal loading port accurately at each step. be able to.

The copying groove on the copying machine in the present invention describes a locus such that the repair material spray nozzle at the tip of the repair lance moves horizontally. That is, as shown in FIG. 6A, the distance L between the lance holder of the repair lance and the repair material spraying nozzle and the clamp position O are determined between An and Bn (where n = 1, 2, 3). Tilt center, trajectory A ₁
Grooves scanning the to A _3, a straight line B ₁ .about.B ₃ and brick joints. Assuming that the absolute angle of the inclination with respect to the vertical line (A ₂ B ₂ ) is θ and the penetration depth OB ₂ of the repair lance of the repair lance of the repair lance is x, the tilt center O and the scanning groove An with respect to an arbitrary absolute angle θ.
The distance OA (θ) is expressed as OA (θ) = L−x / cos θ FIG. 6B is a diagram in which such a locus is manufactured for each brick joint step and connected so as to move continuously. . When the lance holder moves on the scanning groove as a, b, c..., The repair material spraying nozzle moves as a ′, b ′, c ′. Note that the absolute angle θ of the inclination of the repair lance with respect to the vertical line is determined by the diameter of the charging port of the target coke oven, the distance between the upper surface of the charging port and the clamp position O, and the like.

FIGS. 7 and 8 show a copying machine having a copying machine manufactured on the basis of the principle shown in FIG. 6, wherein a lance holder 73 for fixing a repair lance 72 on a copying machine 71 is attached to a P.
_When moving along the scanning groove 74 from ₁ to P ₂ and P ₃ , the clamping device 75 becomes the center of the inclination of the repair lance 72, but the repair lance 72 is not fixed in the vertical direction. 72 tilted upward or downward, the repairing material spray nozzle 76 is sequentially moved horizontally and S _2, S ₃ from S _1. Trajectories S ₁ to S ₂ and S _{2 of} the repair material spray nozzle 76
Prior to the repair work, the position of the repair lance 72 is determined by the lance holder 73 while watching the monitor television of a monitoring lance camera (not shown) so that ₃ matches the side joint 78 of the furnace wall brick 77. Using the copying machine 71 shown in FIG. 7 and FIG.
Is tilted by the operator via the lance holder 73 along the profile groove 74 so that the.

The furnace wall repairing device of the present invention can be mounted on a mobile vehicle such as a forklift, or can be mounted on a coal-charging vehicle. However, if it is mounted on a mobile vehicle that can pass under a coal-charging vehicle such as a forklift. In addition, furnace wall repair work can be performed even during coal charging work. As a repair material of the furnace wall repair device of the present invention, a wet mortar or a sprayed material can be used. However, spraying the sprayed material onto the joint of the furnace wall melted by the flame is preferable from the viewpoint of the durability of the repaired portion. preferable. Also, a repair lance of the furnace wall repair device of the present invention,
Supply of repair materials, cooling water, cooling compressed air, spraying oxygen or flammable gas to the monitoring lance is conducted by laying pipes on the furnace and introducing heat-resistant rubber hoses.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to FIGS. 1 to 5 showing an embodiment in which a furnace wall repairing apparatus is mounted on a mobile vehicle. FIG. 1 is an external view of a coke oven furnace to be repaired according to the present invention, FIG. 2 is a side view of a moving vehicle being moved, and FIG.
FIG. 4 is a side view showing a state in which the copying machine goes over the rail of the coal-equipped car, FIG. 4 is an overall view of a furnace wall repair device during repair work, and FIG. 5 is an enlarged perspective view of a clamp device of a repair lance. 1 to 5, 1 is a coke oven, 2 is a coke oven 1
The coal tower 3, the rail of the coal-charging car laid on the furnace of the coke oven 1, 4 the coal-charging car movably mounted on the rail 3,
Reference numeral 5 denotes a coal loading port provided on the furnace of the coke oven 1, and a coal loading car 4 loaded with coal loaded in the coal tower 2 moves to a location on the coal loading port 5 where the coal is charged, and carbonizes after coke extrusion. After removing the charging lid of the chamber 6, charging coal is charged through the charging port 5.

Reference numeral 11 denotes a copying machine including a copying disk 13 having a copying groove 12 and a clamping device 14, reference numeral 15 denotes a repair lance having a repair material spraying nozzle 16 at the tip, reference numeral 17 denotes a monitoring lance having a television camera at the tip, and reference numeral 18 Is repair lance 1
5. A mobile vehicle including a monitoring lance 17 and a forklift that transports the copying machine 11, and can pass under the coal loading vehicle 4. 19 is a jib crane provided on the moving vehicle 18,
As shown in FIG. 2, the repair lance 15 and the monitoring lance 17 are placed on the moving vehicle 18 while moving on the furnace, and the jib crane 19 is contracted to pull the copying machine 11. Further, when the copying machine 11 cannot be placed on the target coal loading port 5 without passing the rail 3, the copying machine 11 is lifted by the jib crane 19 as shown in FIG. Place on 5. 20 is a repair lance 15 and a monitoring lance 1
A spring balancer provided on a jib crane 19 that lifts 7 is configured to always support the repair lance 15 and the monitoring lance 17 upward with the same weight as their own weight.

Reference numeral 21 denotes a lance holder which is slidably fitted to the repair lance 15. The lance holder 21 can be fixed to the repair lance 15 by bolts and has a roll engaged with the profile groove 12 of the profile board 13. When the repair lance 15 is tilted about the clamp device 14 by moving the repair lance 15 along the scanning groove 12, the repair material spray nozzle 16 of the repair lance 15 is provided.
Are configured to move horizontally. Clamping device 14
Consists of two rolls 22 and a roll box 23 having an arcuate recess 24 at the center. The repair lance 15 is sandwiched by the arcuate recesses 24 of the roll 22 so that the axial direction of the roll 22 is fixed. The lance holder 2 of the repair lance 15
When the repair lance 15 is tilted about the center point of the clamp by the movement of the repair lance 15 along the scanning groove 12, the roll box 2
3 itself is configured to tilt. In addition, 25 is a monitor television of the camera of the monitoring lance 17 mounted on the moving vehicle 19, 26 is a furnace wall brick, and 27 is a horizontal joint of the furnace wall brick 26. The supply of the repair material, the cooling water, the cooling compressed air, the thermal spray oxygen or the combustible gas to the repair lance 15 and the monitoring lance 17 is performed via a heat resistant rubber hose from a pipe (not shown) laid on the furnace.

By repairing the joints of the furnace wall bricks 26 below the coal opening 5 and repairing the open joints 27 with the above construction, as shown in FIG. 2, the repair lance 15 and the monitoring lance 17 are used. Is placed on a moving vehicle 18, and the jib crane 19 is contracted to pull the copying machine 11, and the worker drives the moving vehicle 18 to place the copying machine 11 on the coal loading port 5 to be repaired. Then, the worker lifts the repair lance 15 and the monitoring lance 17 with the jib crane 19 of the moving vehicle 18, clamps the repair lance 15 with the clamp device 14, and inserts the monitoring lance 17 as it is into the furnace from the coal charging port 5; The repair lance 15 is suspended at the center of the coal mouth 5. Further, the worker looks at the image on the monitor television 25 taken by the television camera of the surveillance lance 17 while watching the repair lance 15.
Repair material spray nozzle 16 at the tip and furnace wall brick 2 to be repaired
6 is aligned with the same level as the horizontal joint 27, the roll of the lance holder 21 of the repair lance 15 is engaged with the copying groove 12 of the copying board 13, and the lance holder 21 is fixed to the repair lance 15 with a bolt at that position. .

Thereafter, the worker pulls up the monitoring lance 17 from the coal charging port 5 and tilts the repair lance 15 while spraying the repair material from the repair material spraying nozzle 16 of the repair lance 15 to roll the lance holder 21. Moves along the scanning groove 12 of the copying machine 13 and the repair material spraying nozzle 16 of the repair lance 15 moves horizontally along the horizontal joint 27 of the furnace wall brick 26 to be repaired. It will be repaired every time. When the repair of one of the furnace wall bricks 26 is completed, the direction of the repair material spraying nozzle 16 is rotated by 180 °, and the roll of the lance holder 21 is rotated in the opposite direction to the above.
If it moves along 2, the damaged joint 27 of the other furnace wall brick 26 can be repaired. In other words, the repair material spraying nozzle 16 and the joints 27 of the furnace wall bricks 26 to be repaired are made to match the same level once, so that
The 27 joints of the side wall joints of the furnace wall bricks 26 on both sides can be repaired. During the repair, since the position of the repair material spraying nozzle 16 is defined by the copying machine 13, the repair can be performed without photographing with the television camera of the monitoring lance 17 and observing the image on the monitor television 25. it can.

[0023]

As described above, according to the present invention,
Since the position of the repair material spraying nozzle is determined using the copying machine, the repair material spraying nozzle can be moved accurately along the horizontal joints without observing the repair part during repair, and the damage is accurate Joints can be repaired and furnace life can be extended. In addition, the repair device itself becomes a simple facility, is low in cost, has high mobility, and is equipped with a mobile vehicle that can pass through a coal-carrying vehicle.

[Brief description of the drawings]

FIG. 1 is an external view of a coke oven furnace to be repaired according to the present invention.

FIG. 2 is a side view of a moving vehicle equipped with the repair device of the present invention while moving.

FIG. 3 is a side view showing a state in which the copying machine of the mobile vehicle equipped with the repair device of the present invention crosses the rail of a coal-equipped vehicle.

FIG. 4 is an overall view of a furnace wall repair device during repair work.

FIG. 5 is an enlarged perspective view of a clamp device for a repair lance.

6A and 6B are explanatory diagrams of the principle of the copying machine, wherein FIG. 6A is an explanatory diagram of the horizontal movement of the repair material spraying nozzle, and FIG. 6B is a diagram when the lance holder is moved along the copying groove. It is a track explanatory view of a repair material spraying nozzle.

FIG. 7 is a front view of a repair state of a copying machine equipped with a copying machine and a clamp device.

FIG. 8 is a side view of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 coke oven 2 coal tower 3 rail 4 coal loading car 5 coal loading port 6 carbonization chamber 11 copying machine 12, 74 copying groove 13, 71 copying machine 14, 75 clamping device 15, 72 repair lance 16, 76 repair material spray nozzle 17 Monitoring lance 18 Moving vehicle 19 Jib crane 20 Spring balancer 21, 73 Lance holder 22 Roll 23 Roll box 24 Arc recess 25 Monitor TV 26, 77 Furnace wall brick 27, 78

────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Takafumi Saji 3 Kashima-cho, Kashima-gun, Ibaraki Pref. Kashima Works, Sumitomo Metal Industries, Ltd. (56) References JP-A-7-126635 (JP, A) JP JP-A-7-126637 (JP, A) JP-A-7-126638 (JP, A) JP-A-5-311173 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) C10B 29 / 06

Claims (2)

(57) [Claims] 1. A repair lance having a repair material spraying nozzle at a tip from a coal filling port for repairing a joint of a furnace wall below a coal coke charging port, and ascending and descending a position above the coal loading port of the repair lance. tiltably clamped, engaged in the groove profiling the top of the lance holder than the clamp position of the repair lance by Rukoto is moved along the groove profiling the lance holder,
A method for repairing a furnace wall at a lower portion of a coke oven charging port, characterized in that a repair material spray nozzle of a repair lance moves horizontally at each joint of a furnace wall. 2. A copying machine which can be mounted on a coke oven having a clamp mechanism for vertically moving and tilting a copying lance and a repair lance in a furnace wall repairing device below a coke oven charging port. A repair lance having a repair material spray nozzle, a surveillance lance having an optical fiber or a television camera, a lance holder for engaging the scanning groove above the repair lance at a clamp position, and connecting to the optical fiber or the television camera of the surveillance lance. A furnace wall repairing device at the lower part of a coke oven charging port, comprising a monitor television.