WO2009147983A1

WO2009147983A1 - Flame spraying repair equipment, and flame spraying repair method of coke oven

Info

Publication number: WO2009147983A1
Application number: PCT/JP2009/059694
Authority: WO
Inventors: 康志筒井; 清人笠井; 健一松延; 康弘森本
Original assignee: 新日本製鐵株式会社; 黒崎播磨株式会社
Priority date: 2008-06-04
Filing date: 2009-05-27
Publication date: 2009-12-10
Also published as: CN101983226A; KR101177213B1; BRPI0913431B1; KR20100120227A; JPWO2009147983A1; CN101983226B; JP5315341B2; BRPI0913431A2

Abstract

Flame spraying repair equipment for repairing the wall brick of a carbonization chamber of a coke oven by spraying, comprising a first burner and a second burner each having a powder injection nozzle for injecting spray powder, and a plurality of flamethrower nozzles arranged around the powder nozzle. First intersections where the throwing axes of flame of respective flamethrower nozzles of the first burner intersect each other are located on the powder injection line of the powder injection nozzle of the first burner. Second intersections where the throwing axes of flame of respective flamethrower nozzles of the second burner intersect each other are located on the power injection line of the powder injection nozzle of the second burner. The distance from the powder injection nozzle of the first burner to the first interconnection is longer than the distance from the powder injection nozzle of the second burner to the second interconnection.

Description

Thermal spray repair device and thermal spray repair method for coke oven

The present invention relates to a thermal spray repair apparatus and a thermal spray repair method for a coke oven.
This application claims priority based on Japanese Patent Application No. 2008-147282 for which it applied to Japan on June 4, 2008, and uses the content here.

Since the conventional coke oven has no restraint such as iron skin and the carbonization chamber wall is formed only of bricks, the furnace body expands with the passage of time. As the furnace body expands, the vertical cracks of the carbonization chamber wall bricks expand and damage to the joints becomes significant, so the friction between the coke and the carbonization chamber wall bricks when extruding the coke is increased. Will increase. As a result, there is a possibility that the coke extrusion load increases, and that black smoke leaks out from the damaged part of the joint or the part of the vertical crack.

As a method for repairing damage to the carbonization chamber wall brick, a dry seal method is generally adopted in which the internal pressure of the coke oven is adjusted and powder is blown from the insertion hole at the top of the coke oven.

Further, Patent Document 1 below proposes a method for repairing thermal spraying after knowing in advance the position of the concavity and convexity of the worn part by the plane coordinates of the X axis and the Y axis.

Further, in Patent Document 2 below, as an apparatus used for thermal spray repair, a large number of powder injection holes and flame gas emission holes are arranged in parallel along a linear direction in the same plane, and 150 mm to the front from the plane. A rectangular thermal spray burner in which the powder injection axis and the flame emission axis intersect at a position of 300 mm has been proposed.

Further, in Patent Document 3 below, a spraying nozzle for powder injection is arranged at the center, and further, flame spraying is arranged in at least two or more rows concentrically around the injection nozzle at the center. A burner is disclosed. The axis of each injection port intersects on the extension axis of the thermal spray burner.

Further, in Patent Document 4 below, an inner pipe for flowing the mixed powder of the refractory material and the solid fuel by the carrier gas and an annular flow path for flowing the combustion-supporting gas are disposed between the inner pipe. A flame spray spray repair gun nozzle having a concentric double tube structure comprising an outer tube to be formed is disclosed. At the tip of this flame spray spray repair gun nozzle, the angle formed by the gas injection direction from the annular flow path and the nozzle axis is set in the range of 25 to 60 degrees.

Further, the following Patent Document 5 describes: a cart that moves forward and backward in a furnace of a chamber-type coke oven; an imaging device that images the carbonization chamber wall surface, a distance meter that measures the distance from the carbonization chamber wall surface, and the carbonization chamber wall surface An observation / diagnosis device having a thermometer for measuring the temperature of the carbon; a carbon combustion removal device that burns and removes adhering carbon by locally blowing oxygen gas or oxygen-excess fuel gas to the carbonization chamber wall; and the carbonization chamber wall A mechanical deburring device that mechanically removes the brick surface and / or adhering carbon, which is, a thermal spraying device for spraying a refractory on the wall surface of the carbonization chamber to repair the refractory; and provided at the front of the carriage A coke oven diagnostic repair device comprising: the observation diagnostic device; the carbon combustion removal device; the mechanical chip removal device; and a drive device for moving the thermal spraying device. It is.

Japanese Patent No. 3687487 Japanese Utility Model Publication No. 54-78718 Japanese Utility Model Publication No. 63-167029 Japanese Utility Model Publication No. 61-13300 Japanese Utility Model Publication No. 63-167029

By the way, since there are damages having various shapes in the coking oven wall brick of the coke oven, repairs corresponding to the situation of these damages are necessary.
However, the repair by the conventional dry seal method can repair one kind of damage, but there is a problem that the maintenance time of the effect is very short and the number of repairs must be increased. In addition, since the method uses the pressure difference between the carbonization chamber and the combustion chamber, it is not possible to selectively repair high-priority repair points, and the effect of repair on wide cracks is small. There is.
In addition, the technique described in Patent Document 1 is basically intended for repairing a recess in a carbonization chamber wall, and does not specifically describe a repair method for a crack that is another damage.
Furthermore, since the technique described in Patent Document 2 uses a square burner, the range of the sprayed molten powder becomes wide. As a result, it is impossible to follow and repair the unevenness of the concave damaged portion of the carbonization chamber wall brick. In addition, there is a problem that the melt of the thermal spray powder cannot enter the narrow crack, and conversely, the flatness around the crack is impaired.
Similarly, the techniques described in Patent Documents 3 to 5 are also intended to repair one type of damage, and can perform repairs adapted to the damage situation of the carbonization chamber wall bricks with multiple types of damage. Absent.

The present invention has been made in view of the above circumstances, and corrugated chamber walls of a coke oven, such as concave damage sites, joint damage sites, and vertical crack sites, corresponding to the situation of these damaged sites, Provided is a thermal spray repairing apparatus capable of performing efficient thermal spraying repair that can be efficiently flattened from a level of a surrounding brick that is not far away from the level, and a thermal spray repairing method for a coke oven. For the purpose.

The present invention employs the following means in order to solve the above problems and achieve the object. That is,
(1) One aspect of the present invention is a thermal spray repairing apparatus that repairs a carbonization chamber wall brick of a coke oven by thermal spraying, and a plurality of powder spraying ports that spray sprayed powder and the periphery of the powder spraying ports. A first burner having a first flame burner opening and a second burner; a first crossing position at which the flame emission axes of the flame burner openings of the first burner intersect each other is the first burner. The second jet position of the second burner is on the powder injection axis of the powder injection port of the burner; the second intersection position where the flame emission axes of the respective flame emission ports of the second burner intersect each other is the powder injection of the second burner On the powder spray axis of the mouth; the distance from the powder spray port of the first burner to the first intersection position is from the powder spray port of the second burner to the second intersection position Longer than the distance.

(2) The thermal spray repair apparatus according to (1) may further include a first burner attachment portion to which the first burner and the second burner are alternatively attached.
(3) Alternatively, the thermal spray repair apparatus according to (1) may further include a second burner mounting portion to which both the first burner and the second burner are mounted.

(4) In the thermal spray repair apparatus according to the above (1), the first burner is a burner for repairing a recess; the second burner is a burner for repairing a crack portion; May be.

(5) In the thermal spray repairing apparatus according to (1), the first intersection position is within a range of 150 mm or more and 250 mm or less from the powder injection port of the first burner; The position is within the range of 75 mm or more and less than 150 mm from the powder injection port of the second burner;

(6) In the thermal spray repair apparatus according to the above (1), the first burner is formed between the two flame radiation axes sandwiching the powder injection port between the flame radiation ports. The crossing angle formed between the two flame emission axes of the second burner with the powder injection port interposed between the flame emission axes is 20 degrees or less. A configuration may be employed.

(7) In the thermal spray repair apparatus according to (1), a distance meter that measures a distance between the surface of the carbonization chamber wall brick and at least one of the first burner and the second burner is further provided. You may prepare.

(8) Another aspect of the present invention is a method for spraying and repairing a coke oven wall brick of a coke oven by thermal spraying, wherein a first distance is placed with respect to the surface of the coking chamber wall brick. A first repairing step of spraying a first thermal spraying powder containing silica and radiating a plurality of flames to perform thermal spraying; a second distance from the surface of the carbonization chamber wall brick; A second repairing step of spraying a second thermal spraying powder and spraying a plurality of flames to perform thermal spraying, wherein the content of the silica in the second thermal spraying powder is the first thermal spraying. Less than the silica content in the powder; the second distance is shorter than the first distance.

(9) In the thermal spray repair method for a coke oven according to (8), the first repair step is a recess repair step for repairing a recess formed on the surface of the carbonization chamber wall brick; The repair process 2 may be a crack repair process for repairing a crack portion formed on the surface of the carbonization chamber wall brick.

(10) In the thermal spray repair method for a coke oven described in (8) above, the first distance is in a range of 150 mm to 250 mm; the second distance is in a range of 75 mm to less than 150 mm. It may be in;

(11) The thermal spray repair method for a coke oven according to (8) further includes a measurement step of measuring in advance at least one of the first distance or the second distance using a distance meter; Based on the result of the measurement in the process, the first repair process and the second repair process may be performed.

(12) In the coke oven thermal spray repairing method according to (8) above, a carbon adhesion determining step for determining whether or not carbon adheres to the surface of the carbonization chamber wall brick; and the carbon adhesion determining step; A carbon removing step of removing oxygen by spraying oxygen on the carbon adhering site when adhesion is determined; and performing the first repairing step and the second repairing step. Also good.

In the thermal spray repair apparatus described in (1) above, a configuration in which the distance from the powder injection port of the first burner to the first intersection position is longer than the distance to the second intersection position of the second burner is adopted. is doing. Thus, since the 1st burner and the 2nd burner from which spraying powder spraying and the distance of flame radiation differ are relatively comprised, by using these properly, it is in the damage condition of the surface of a carbonization chamber wall brick. Corresponding repairs can be performed.

More specifically, for example, as described in (4) above, the first burner is used as a recess repair burner and the second burner is used as a crack repair burner. be able to. In this case, when the recess is repaired, the recess can be flattened by spraying a thick sprayed powder so as to fill the recess from a distance from the surface of the carbonization chamber wall brick using a burner for repairing the recess. As a result, it is possible to repair the carbonization chamber wall brick without unevenness. On the other hand, when repairing a joint damage site or a crack damage site, a thermal spray powder is sprayed thinly on the joint damage site or crack damage site from a short distance to the surface of the carbonization chamber wall brick using a crack repair burner. As a result, the repair can be performed without impairing the flatness around the joint damage site or the crack damage site.

Further, according to the thermal spray repair method for a coke oven described in (8) above, the same effects as those of the thermal spray repair apparatus described in (1) above can be obtained. That is, in the thermal spraying repair method for a coke oven described in (8), repair can be performed separately in the first repair process and the second repair process, so repair corresponding to the damage state of the surface of the carbonization chamber wall brick. It can be performed.

It is a side view showing the whole thermal spray repair apparatus composition concerning a 1st embodiment of the present invention. It is a figure which shows the recessed part repair burner of the thermal spray repair apparatus, Comprising: It is sectional drawing at the time of seeing in the cross section containing the axis line. It is a front view of the burner for the said recessed part repair. It is a figure which shows the crack part repair burner of the thermal spray repair apparatus, Comprising: It is sectional drawing at the time of seeing in the cross section containing the axis line. It is a front view of the burner for the crack part repair. It is a top view which shows the repair condition of the recessed part damage location in the carbonization chamber wall of a coke oven. It is a top view which shows the repair condition of the crack part damaged part in the carbonization chamber wall of a coke oven. It is a flowchart for demonstrating the thermal spray repair method of the coke oven of this invention. It is a figure which shows the shape of the construction body formed by the thermal spraying construction of the recessed part repair burner, Comprising: It is sectional drawing at the time of seeing in a cross section perpendicular | vertical to the wall surface of a carbonization chamber wall. It is a figure which shows the shape of the other construction body formed by the thermal spraying construction of the crack part repair burner, Comprising: It is sectional drawing at the time of seeing in a cross section perpendicular | vertical to the wall surface of a carbonization chamber wall. It is a side view showing the whole structure of the thermal spray repair apparatus which concerns on 2nd Embodiment of this invention.

The thermal spray repair apparatus according to the present invention is a thermal spray repair apparatus for a coking chamber wall brick of a coke oven, and includes a plurality of replaceable burners. In this burner, a powder injection port for injecting a thermal spray material (spraying powder) is formed in the center, and a radiation port array in which a plurality of flame radiation ports are arranged so as to surround this powder injection port is located outside the powder injection port. At least one or more rows are formed.
And the said burner has the 1st burner in which the intersection position of each flame radiation axis of each flame radiation port is on the powder ejection axis of the powder ejection port, and the intersection position of each flame radiation axis of each flame radiation port. A second burner on the powder injection axis of the powder injection port. Then, the distance from the powder injection port of the first burner to the intersection position between the flame emission axes of each flame emission port is the intersection between the flame emission axis of each flame emission port from the powder injection port of the second burner. It is longer than the distance to the position. The first burner is preferably used as a recess repair burner, and the second burner is preferably used as a crack repair burner.

As described above, in the burner for repairing the recess, the distance from the powder injection port to the intersection position of the flame emission axes of the flame emission ports is set longer than that of the burner for repairing the crack portion. Therefore, the thermal spray material can be sprayed from a long distance to a narrow range with respect to the surface of the carbonization chamber wall brick, which is suitable for repairing by flattening the damaged portion by thickly spraying the thermal spray material.
On the other hand, the crack part repair burner is set so that the distance from the powder injection port to the crossing position of each flame radiation axis of each flame radiation port is shorter than that of the concave part repair burner. Therefore, spraying material can be sprayed over a wide range from a short distance to the surface of the carbonization chamber wall brick, and the sprayed material is thinly sprayed to melt the sprayed powder into narrow parts such as joint damage parts and crack damage parts. Can be infiltrated. Moreover, the flatness around the narrow portion is not impaired.
According to such a thermal spraying apparatus of the present invention, repair can be performed without impairing the flatness of the coking oven wall brick by appropriately using a plurality of types of burners according to the shape of the damaged portion. . And since it is a spraying repair, compared with the repair by the conventional dry seal method, durability of the carbonization chamber wall brick after repair can also be improved.

In the thermal spray repairing apparatus of the present invention, in the burner for repairing the recess, the crossing position of the flame emission axis of each flame emitting port is at a position 150 mm or more and 250 mm or less away from the powder injection port of the burner for repairing the recess. In the burner for repairing a crack portion, the crossing position of the flame emission axis of each flame emission port is preferably at least 75 mm and less than 150 mm away from the powder injection port of the burner for repairing the recess.

The furnace width of the coking chamber of the coke oven is, for example, about 400 mm, and the thermal spray repair must be performed in the vertical direction with respect to the carbonization chamber wall brick. When repairing a damaged part of a recess, it is necessary to follow the subtle unevenness, the adhesion yield is high, and the construction body to be formed when the burner for repairing the recess is moved in a linear direction along the wall surface. It is necessary to form an acute triangle having a stable shape and a narrow width.
On the other hand, when repairing joint damage sites or vertical crack damage sites, it is necessary to make the molten powder collide even more narrowly.On the other hand, when moving in a linear direction along the wall surface, on the contrary, It should be in a state close to a flat surface so that the melt does not scatter around to form a stable construction shape or form a convex shape far away from the flat plate level of the brick around the crack. is necessary.

Therefore, by setting the burner for repairing the recesses so that the crossing positions of the flame emission axes of the respective flame radiating ports are separated from the powder injection port of the burner for repairing the recesses by a distance of 150 mm or more and 250 mm or less. In addition, it is possible to form a construction body having a cross section having an acute triangular shape with respect to the wall surface. In addition, it is also possible to incorporate a cooling structure into the burner for repairing the recesses, and thermal spray repair can be performed even in a high-temperature state of the coke oven in the coke oven at 1200 ° C.
In addition, if the said distance is less than 150 mm, it will become difficult to form a triangular-shaped construction body with an acute angle with respect to a wall surface stably. On the other hand, if the distance exceeds 250 mm, a burner for repairing a recess usually comes into contact with the other carbonization chamber wall facing the wall to be repaired, and the distance cannot be secured. In addition, wide construction is performed on the wall surface, which may make it difficult to follow subtle irregularities.
Moreover, the reason why the burner for repairing the crack portion is set such that the crossing position of the flame emission axis of each flame emission port is a distance of 75 mm or more and less than 150 mm from the powder injection port of this burner is as follows. .
When the distance is less than 75 mm, it may be difficult to completely melt the thermal spray material having a fireproof temperature of 1200 ° C. or higher. On the other hand, if the distance is 150 mm or more, it is difficult to selectively fill and repair the thermal spray material inside the crack, the melt of the thermal spray material does not reach the joint damage part or the deepest part of the crack damage part, There is a concern that the area around the joint damage or crack may rise to a convex shape and lead to an increase in coke extrusion load.

In the thermal spray repairing apparatus according to the present invention, the recess repair burner has an angle of intersection of 10 degrees or less between the flame emission axes of any two flame emission ports, and the crack repair burner is optional 2 The crossing angle formed by the flame emission axes of the two flame emission ports is preferably 20 degrees or less.
When the crossing angle of the burner for repairing the recesses exceeds 10 degrees, the spread of the sprayed material becomes large, and it becomes difficult to stably form a triangular construction body having a sharp angle in a cross section perpendicular to the wall surface.
On the other hand, if the crossing angle of the crack repairing burner exceeds 20 degrees, the spraying angle of the sprayed material is too large against the wall surface of the carbonization chamber wall, making it difficult to selectively fill and repair the crack. There is a concern that the melt of the sprayed material will not reach the deepest part of the joint damage part or crack damage part, or the periphery of the joint damage part or crack part will rise to a convex shape and lead to an increase in the coke extrusion load. .

In the thermal spray repair apparatus of this invention, it is preferable to provide the distance meter which measures the recessed part depth of a repair location. For example, a laser profile meter can be used as the distance meter.
This laser profile meter functions as a measuring device that measures the powder injection distance to the work surface by being provided in the vicinity of the powder injection port. Therefore, when the thermal spray repair device is equipped with such a laser profile meter, the distance between each burner and the work surface is surely grasped, and when repairing the recesses and cracks, the thermal spray material can be used under appropriate conditions. Thermal spraying can be performed.

In the thermal spray repairing method of the coke oven of the present invention, while spraying a thermal spray material containing silica, the intersection position of each flame radiation axis of a plurality of radiated flames is 150 mm or more on the spray axis from the spray position of the thermal spray material. And a recess repairing step in which thermal spraying is performed at a position at a distance of 250 mm or less; between each flame radiation axis of a plurality of radiated flames while spraying a thermal spray material having a lower silica content than the thermal spray material repairing the recess. The crossing position has a crack repairing step in which spraying is performed at a position at a distance of 75 mm or more and less than 150 mm on the spray axis from the spray position of the spray material. In addition, about each burner, it is preferable that the crossing angle which each flame radiation axis of arbitrary two flame radiation ports makes is set to the range similar to the above, respectively.

The material for repairing the cracked portion preferably has a lower silica content than the material for repairing the concave portion.
Specifically, for example, as a thermal spray material for repairing recesses, a material having a silica content of about 95% by mass, a fireproof temperature of 1680 ° C., and a particle size of less than 0.2 mm is employed with a material of 100 to 67% by mass. can do.
On the other hand, as the thermal spray material for repairing the cracked portion, a material having a silica content of 80% by mass, a fireproof temperature of 1450 ° C., and a particle size of less than 0.2 mm can be employed in a range of 100 to 67% by mass.
The reason why the silica content of the thermal spray material for repairing cracks is lower than the thermal spray material for repairing recesses is that the lower the silica content, the lower the fire resistance temperature and the easier it is for the thermal spray material to melt. As a result, it becomes easier to enter narrow repair sites such as joint damage sites and crack damage sites, and the molten sprayed material diffuses to the wall surfaces around the joint damage sites and crack damage sites due to melting, resulting in a flat surface. It is because it becomes easy to maintain.

In addition, before the repair process for the recesses or cracks, a measurement process is performed to measure the distance between the surface to be sprayed and the burner for repairing the cracks or the burner for repairing the cracks using a laser profile meter. It is preferable to perform thermal spray repair based on the measurement result. Furthermore, at that time, it is measured whether or not carbon is attached to the carbonization chamber wall, and if it is determined that carbon is attached, before each repair process, oxygen is blown into this part to blow carbon. It is preferable to carry out the removing step.
The presence or absence of carbon adhesion can be confirmed by mounting an area sensor such as a CCD camera or a CMOS sensor on the thermal spray repair apparatus.
When carbon adheres, even if the thermal spray material is sprayed and repaired, the thermal spray material does not firmly adhere to the carbonization chamber wall and easily falls off. Therefore, by spraying oxygen on the carbon adhesion site in advance, the sprayed material can be reliably adhered to the carbonization chamber wall and firmly repaired.

The thermal spray repair method for a coke oven according to the present invention can be carried out in a carbonization chamber after coke is extruded during operation of the coke oven.
The coke oven has a structure in which a large number of narrow carbonization chambers are arranged in parallel. Coal is sequentially charged into each carbonization chamber from an upper charging port, and carbonized in the carbonization chamber to obtain coke. Therefore, since the timing of charging is different in each carbonization chamber, the timing of pushing out coke is also different.
According to the present invention, the coke oven can be repaired in a short time after extruding the coke after carbonization, so that the operation of the coke oven is stopped as in the case of repairing by conventional human work. This eliminates the need for repairs and greatly improves the operating rate of the coke oven.

[First Embodiment]
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the drawings.
FIG. 1 shows a thermal spray repair apparatus 1 according to this embodiment. This thermal spray repair apparatus 1 is an apparatus for repairing the breakage of bricks generated in the carbonization chamber wall 3 of the coke oven 2 by thermal spraying.
Since the inside of the carbonization chamber is a narrow and narrow space of about 400 mm, in order to repair the wall 3 of the carbonization chamber, the thermal spray repair apparatus 1 is inserted into the inside of the carbonization chamber and has a mechanism capable of performing thermal spray repair by remote control. I have.
In addition, as damage in the carbonization chamber wall 3, there are a recessed portion damaged portion 4, a crack damaged portion 5 caused by damage of a vertical joint portion or a crack of a brick, and the like. If these are left unattended, the flatness of the carbonization chamber wall 3 deteriorates, so that the load when extruding the coke increases, or problems such as leakage of graphite from cracked parts occur.

As shown in FIG. 1, the thermal spray repairing apparatus 1 includes an advancing / retreating direction moving mechanism 11, an up / down direction turning mechanism 12, a left / right direction turning mechanism 13, a cooling device 14, a CCD camera 15, and a laser profile meter 16. , A suspension machine 17, a controller 18, a thermal spraying device 19, and a plurality of types of burners 20.
The advancing / retreating direction moving mechanism 11 is a mechanism that moves the thermal spray repairing apparatus 1 in the depth direction inside the carbonization chamber. The vertical turning mechanism 12 is provided at the tip of the forward / backward moving mechanism 11 and turns the CCD camera 15, laser profile meter 16, lifter 17, and burner 20 in the vertical direction. The left-right direction turning mechanism 13 is provided at the tip of the up-down direction turning mechanism 12, and is a mechanism for turning the CCD camera 15, the laser profile meter 16, the suspension machine 17, and the burner 20 in the left-right direction.
Then, by these forward / backward moving mechanism 11, up / down direction turning mechanism 12, and left / right direction turning mechanism 13, the thermal spray repairing apparatus 1 causes the CCD camera 15, the laser profile meter 16, the suspension machine 17, and the burner 20 to pass through the carbonization chamber wall. 3 can be moved closer to, separated from, and further moved in the vertical and horizontal directions along the wall surface direction of the carbonization chamber wall 3.

The cooling device 14 is a device that cools the thermal spray repair device 1 from the outside, and supplies cooling water to the thermal spray repair device 1 through a pipe and further circulates so that the thermal spray repair device 1 does not reach a high temperature. ing.
The CCD camera 15 is a device for observing the state of the carbonization chamber wall 3, the damage state at the X position and the Y position in the vertical and horizontal directions along the wall surface of the carbonization chamber wall 3, and the carbon of the carbonization chamber wall 3. The attached state can also be observed from the outside of the coke oven 2.

The laser profile meter 16 is a device that measures the distance between the burner 20 of the thermal spray repair apparatus 1 and the wall surface of the carbonization chamber wall 3 that is the work surface. The crack depth etc. in the damaged part 5 can be measured.
The image signal and profile signal output from the CCD camera 15 and the laser profile meter 16 are analyzed on the controller 18 arranged outside the furnace, and the drive control of the thermal spray repair apparatus 1 is performed based on the analysis result. .
The suspension machine 17 is a device that holds (cuts) the wall surface of the carbonization chamber wall 3, and is used to remove brick scraps and foreign substances on the wall surface according to the damage state of the carbonization chamber wall 3.

The thermal spraying device 19 includes a gas cylinder, a powder supply device, a gas supply device, and the like, and supplies a thermal spray material and a flame radiation fuel to the burner 20.
The thermal spray specifications in the thermal spraying device 19 and the cooling device 14 are shown in Table 1 below.

The burner 20 of the present embodiment includes a concave portion repair burner and a crack portion repair burner, and these are used by being alternatively exchanged and attached to the first burner attachment portion 13a in the left and right direction turning mechanism 13. can do. In the present embodiment, only these two types are prepared. However, the present invention is not limited to this, and more types of burners are prepared according to the state of damage, and these are alternatively attached to the first burner. It can also be used by attaching to the part 13a. Hereinafter, the concave portion repair burner and the crack portion repair burner will be described in detail.

2A and 2B show a sectional view and a front view of the recess repair burner 21A, respectively.
As shown in FIGS. 2A and 2B, the recess repairing burner 21 A is composed of a disk-shaped body, and the powder injection axis A 1 is disposed outside the surface of the disk-shaped body in the approximate center of the disk-shaped body. A powder injection port 22 facing in the linear direction is formed. Around the powder injection port 22, a plurality of emission port arrays 24 in which a plurality of flame emission ports 23 are arranged in a circular shape so as to surround the powder injection port 22 are formed. In the present embodiment, the radiation port arrays 24 are formed in three rows from the center of the powder injection port 22 toward the outside.
Each flame radiation axis A2 of each flame radiation port 23 intersects at a position of a distance D1 on the powder injection axis A1, and any two flame radiation axes A2 sandwiching the powder injection axis A1 are at an intersection angle θ1. Cross at.
In this embodiment, the value of the distance D1 in the recess repair burner 21A is set to 200 mm. The intersection angle θ1 is set to 10 degrees or less. The angle formed by the powder injection axis A1 and the arbitrary flame emission axis A2 is, for example, 5 degrees or less.

3A and 3B show a cross-sectional view and a front view of the crack portion repair burner 21B, respectively.
As shown in FIGS. 3A and 3B, the crack repair burner 21B also has a structure substantially similar to the recess repair burner 21A, and a powder injection port 22 is formed at the center thereof. A plurality of radiant port arrays 24 in which a plurality of flame radiant ports 23 are arranged in a circular shape so as to surround are formed. In the present embodiment, the radiation port arrays 24 are formed in three rows from the center of the powder injection port 22 toward the outside.
However, the angle of each flame radiation axis A3 of each flame radiation port 23 with respect to the powder injection axis A1 is different from the recess repair burner 21A. In this embodiment, the position of the distance D2 that is the intersection position of the flame radiation axes A3 is 100 mm, and is set shorter than the recess repair burner 21A. Further, the crossing angle θ2 formed by any two flame emission axes A3 is set to 20 degrees or less, for example. The angle formed by the powder injection axis A1 and the arbitrary flame emission axis A3 is, for example, 10 degrees or less.
The other detailed specifications of the recess repair burner 21A and the crack repair burner 21B are as shown in Table 2 below.

Such a recess repair burner 21 A and a crack repair burner 21 B are selectively used according to the damage state of the wall surface of the carbonization chamber wall 3.
For example, as shown in FIG. 4, the concave portion repair burner 21 A is used mainly to repair the concave portion damaged portion 4 of the carbonization chamber wall 3, and spraying is performed while maintaining the above-described distance D 1.
As the thermal spray material used in the recess repair burner 21A, a material having a silica content of about 95% by mass, a fireproof temperature of 1680 ° C., and a particle size of less than 0.2 mm may be 100 to 67% by mass. preferable.
On the other hand, as shown in FIG. 5, the crack repair burner 21B is mainly used to repair the cracked portion damaged portion 5 of the carbonization chamber wall 3, and spraying is performed while maintaining the above-described distance D2. Is called.
As the thermal spray material used in the crack repair burner 21B, a material having a silica content of 80% by mass, a fireproof temperature of 1450 ° C., and a particle size of less than 0.2 mm may be 100 to 67% by mass. preferable.

Next, the thermal spray repairing method for the coke oven of the present embodiment using the thermal spray repairing apparatus 1 described above will be described based on the flowchart shown in FIG.
First, the thermal spray repair apparatus 1 in which the concave portion repair burner 21A is mounted in advance is inserted into the carbonization chamber of the coke oven 2 (step S1).
Next, the state in the carbonization chamber wall 3 by the CCD camera 15 is confirmed (step S2).
An operator who operates the thermal spray repairing apparatus 1 confirms whether or not the carbonization chamber wall 3 is damaged (step S3). If damage is recognized, the carbonization chamber wall 3 is carbonized based on the image captured by the CCD camera 15. The damage position on the chamber wall 3 is grasped.
Subsequently, the operator confirms whether or not carbon is attached to the damaged position based on the captured image (step S4). If it is determined that carbon is attached, oxygen is blown to remove the carbon. (Step S5).

Further, the operator confirms whether or not the recessed portion damaged portion 4 is present in the carbonization chamber wall 3 (step S6), and when the recessed portion damage is recognized, the thermal spray repair apparatus 1 is placed near the recessed portion damaged portion 4. Move. And the depth of the recessed part damage location 4 is measured with the laser profile meter 16 (process S7), and thermal spray repair is performed based on the measurement result (process S8).
When the thermal spray repair of the recessed portion damaged portion 4 is completed, the thermal spray repair device 1 is moved (step S9), and the thermal spray repair and the device movement are repeated until the thermal spray repair of all the recessed portion damaged portions 4 is completed (step S10).

When the thermal spray repair of all the recessed portion damaged parts 4 is completed, the operator confirms the presence or absence of the cracked part damaged part 5 (step S11), and determines that the cracked part damaged part 5 exists, the thermal spray repairing apparatus 1 Is removed from the carbonization chamber, and the recessed portion repair burner 21A that has been attached is replaced with a crack portion repair burner 21B (step S12). Similarly to the case of the recessed portion repair, measurement by the laser profile meter 16 (step S13), Thermal spray repair (step S14) and apparatus movement (step S15) are repeated for all cracked parts 5 (step S16).

Such a repairing operation of the carbonization chamber wall 3 by the thermal spray repairing apparatus 1 can be performed during the actual operation of the coke oven 2.
That is, first, coal as a raw material for coke is sequentially charged into the coking chambers arranged in parallel from the charging port formed at the top, and heating is sequentially started from the charged carbonizing chamber. The coke in the carbonization chamber is pushed out one after another, and the inside of the carbonization chamber where the extrusion has finished is inspected and repaired if necessary.
If it does in this way, repair of the carbonization chamber wall 3 can be suitably performed during the operation of the coke oven 2 without stopping the operation of the coke oven 2.

The thermal spray repair of the coking oven wall 2 of the actual coke oven 2 was performed and confirmed by the thermal spray repair method using the thermal spray repair apparatus 1 as described above. The conditions and the like at that time are shown in Table 3 below.

When the recessed portion damaged portion 4 was repaired by the recessed portion repair burner 21A, it was confirmed that the repair was possible within a range of 0 mm to −5 mm with respect to the flat surface of the surrounding brick.
Moreover, when the crack part damaged part 5 was repaired with the crack part repair burner 21B, it was confirmed that the crack inside of the crack part damaged part 5 can be filled densely, without the flat surface of a surrounding brick projecting. Convex bulges were in the range of +2 mm to +5 mm with respect to the flat surface of the surrounding brick, and it was confirmed that the extrusion load did not increase during coke extrusion.

Moreover, as shown in FIG.7 and FIG.8, the thermal spraying was performed on the flat plate H using the recessed part repair burner 21A and the crack part repair burner 21B. The thermal spraying conditions are those in which five layers are reciprocated five times in the linear direction along the flat plate H, and the feed rate of the burner is 1 m / min.
In the case of the concave portion repair burner 21A, as shown in FIG. 7, the thermal sprayed body Y1 swells in a mountain-shaped cross section, and the height direction H1 = 50 mm and the spreading direction L1 = 45 mm.
On the other hand, in the case of the crack repairing burner 21B, as shown in FIG. 8, a thermal sprayed body Y2 is formed that spreads thinly on the surface of the flat plate H, and the height direction H2 = 8 mm and the spreading direction L2 = 110 mm. .
Also from these facts, it was confirmed that by performing the thermal spray repair using the concave portion repair burner 21A and the crack portion repair burner 21B, appropriate thermal spray repair can be performed according to the form of the damaged portion.

Next, Table 4 shows the results of thermal spray repair when thermal spraying is performed using various thermal spray materials.

From Table 4, it can be seen that the thermal spray material 2 is suitable for repairing cracks and the thermal spray material 5 is optimal for repairing recesses.

[Second Embodiment]
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings.
In the first embodiment, a plurality of replaceable burners 20 are alternatively used. In the present embodiment, the thermal spray repairing apparatus 1 is provided with a plurality of types of burners, that is, for recessed portion repair in advance. Both the burner 21A and the crack repairing burner 21B are attached to the second burner mounting portion 13b. The recess repair burner 21A and the crack repair burner 21B are arranged in parallel in the vertical direction as shown in FIG. 9, but these burners may be arranged in any way as long as their functions are exhibited. Good.
In the present embodiment, it is not necessary to replace the recess repair burner 21A and the crack repair burner 21B when shifting from the recess repair process to the crack repair process, so that the work efficiency can be further increased.

According to the present invention, the concave damage part, joint damage part, and longitudinal crack part of the carbonization chamber wall of the coke oven are separated from the level of the surrounding bricks without damage corresponding to the situation of these damage parts. It is possible to provide a thermal spray repairing apparatus that can efficiently perform flattening to a level that is low and that can perform thermal spray repair with high durability, and a thermal spray repair method for a coke oven.

DESCRIPTION OF SYMBOLS 1 Thermal spray repair apparatus 2 Coke oven 3 Coking chamber wall 4 Recessed part damaged part 5 Crack part damaged part 11 Forward / backward moving mechanism 12 Vertical direction turning mechanism 13 Left / right direction turning mechanism 13a 1st burner attaching part 13b 2nd burner attaching part 14 Cooling device 15 CCD camera 16 Laser profile meter 17 Lifting machine 18 Controller 19 Spraying device 20 Burner 21A Recessed burner 21B Crack repair burner 22 Powder injection port 23 Flame emission port 24 Radiation port array A1 Powder injection axis A2 Flame emission axis A3 Flame axis D1 Distance D2 Distance H Flat plate H1 Height direction H2 Height direction L1 Spreading direction L2 Spreading direction Y1 Thermal spray body Y2 Thermal spray body θ1 Crossing angle θ2 Crossing angle

Claims

A thermal spray repairing device for repairing a coking oven wall brick by thermal spraying,
A first burner and a second burner each having a powder injection port for injecting a thermal spray powder and a plurality of flame emission ports arranged around the powder injection port;
A first intersecting position where the flame radiation axes of the respective flame radiation ports of the first burner intersect each other is on the powder injection axis of the powder spray port of the first burner;
A second intersection position where the flame radiation axes of the respective flame radiation ports of the second burner intersect each other is on the powder injection axis of the powder spray port of the second burner;
A distance from the powder injection port of the first burner to the first intersection position is longer than a distance from the powder injection port of the second burner to the second intersection position;
Thermal spray repair equipment characterized by that.
The thermal spray repairing apparatus according to claim 1, further comprising a first burner mounting portion to which the first burner and the second burner are alternatively mounted.
The thermal spray repairing apparatus according to claim 1, further comprising a second burner attachment portion to which both the first burner and the second burner are attached.
The first burner is a recess repair burner;
The second burner is a crack repair burner;
The thermal spray repair apparatus according to claim 1.
The first intersection position is within a range of 150 mm or more and 250 mm or less from the powder injection port of the first burner;
The second intersection position is in a range of 75 mm or more and less than 150 mm from the powder injection port of the second burner;
The thermal spray repair apparatus according to claim 1.
The first burner has an angle of intersection of 10 degrees or less formed between the two flame emission axes of the flame emission openings sandwiching the powder injection openings;
In the second burner, an intersection angle formed between two flame radiation axes sandwiching the powder injection port among the flame radiation ports is 20 degrees or less;
The thermal spray repair apparatus according to claim 1.
The thermal spray repair apparatus according to claim 1, further comprising a distance meter that measures a distance between a surface of the carbonization chamber wall brick and at least one of the first burner and the second burner. .
A coke oven thermal spray repair method for repairing a coke oven wall brick by thermal spraying,
A first repairing step in which a first spraying powder containing silica is sprayed at a first distance from the surface of the carbonization chamber wall brick and sprayed by emitting a plurality of flames;
A second repairing step of spraying a second spray powder containing silica at a second distance from the surface of the carbonization chamber wall brick and spraying a plurality of flames;
Have
The silica content in the second thermal spray powder is less than the silica content in the first thermal spray powder;
The second distance is shorter than the first distance;
A thermal spray repair method for a coke oven characterized by the above.
The first repairing step is a recess repairing step of repairing a recess formed on the surface of the carbonization chamber wall brick;
The second repair step is a crack repair step of repairing a crack formed on the surface of the carbonization chamber wall brick;
The thermal spray repairing method for a coke oven according to claim 8.
The first distance is in the range of 150 mm to 250 mm;
The second distance is in the range of 75 mm or more and less than 150 mm;
The thermal spray repairing method for a coke oven according to claim 8.
A measuring step of measuring at least one of the first distance and the second distance in advance using a distance meter;
Performing the first repair process and the second repair process based on the result of the measurement in the measurement process;
The thermal spray repairing method for a coke oven according to claim 8.
A carbon adhesion determination step for determining whether carbon is adhered to the surface of the carbonization chamber wall brick;
A carbon removing step of removing oxygen by spraying oxygen on the carbon adhering portion when the carbon adhering is determined in the carbon adhering determining step;
The thermal spray repair method for a coke oven according to claim 8, wherein the first repair step and the second repair step are performed.