JP5968247B2 - Burner, combustion furnace, burner assembly method, and burner repair method - Google Patents

Description

  The present invention relates to a burner used in a combustion furnace such as a gasifier for gasifying carbon-containing fuel (more specifically, a coal gasifier for gasifying coal), and further a combustion furnace using the burner. Further, the present invention relates to a burner assembling method and a burner repairing method.

As a burner of a coal gasifier, what was indicated in the following patent documents 1 is known. Since the burner is inserted into the fuel furnace and receives a large heat load, the burner is surrounded by a cooling pipe through which cooling water flows. FIG. 7 shows a diagram corresponding to FIG. As shown in the figure, the burner is installed with its tip positioned in the furnace 102. A burner cooling water pipe 109 is wound around the burner secondary pipe 104. The burner cooling water pipe 109 is installed in contact with the periphery of the burner secondary pipe 104, and is provided from the tip of the burner secondary pipe 104 to the outside of the furnace.
As shown in the figure, the opening through which the burner is inserted is formed by partially bending a plurality of furnace wall tubes 101 arranged in the vertical direction. FIG. 8 shows a view of the opening from the inside of the furnace, and as can be seen from this figure, a part of the furnace wall tube 101 is expanded to form the opening 103.

Japanese Patent Laid-Open No. 10-281414

Since the opening 103 shown in FIG. 8 is formed by partially bending and plastically deforming the furnace wall tube 101, strict accuracy control cannot be performed. Therefore, a gap inevitably occurs between the opening formed in the furnace wall and the burner. Further, from the gap between the opening and the burner, radiation and slag due to the flame in the furnace easily leak out of the furnace through the gap. On the other hand, in the conventional structure shown in FIG. 7, the seal box 107 filled with the refractory material 108 is configured to prevent radiation and slag leakage.
However, even though the refractory material 108 is disposed, damage due to radiation and slag is considered to progress gradually, and further improvement in durability is desired.

This invention is made | formed in view of such a situation, Comprising: It aims at providing the burner and combustion furnace with high durability, the assembly method of a burner, and the repair method of a burner.
It is another object of the present invention to provide a burner, a combustion furnace, and a burner assembling method that can attach a burner with high positional accuracy while having high durability.
It is another object of the present invention to provide a burner, a combustion furnace, a burner assembling method, and a burner repair method in which replacement of a cooling pipe having high durability and quick deterioration is facilitated.

In order to solve the above problems, the burner and combustion furnace, the burner assembling method and the burner repairing method of the present invention employ the following means.
That is, a burner according to the present invention includes a burner body installed through an opening formed in a furnace wall of a combustion furnace, and a cooling pipe that cools the burner body with a cooling medium that circulates inside. In the burner, the cooling pipe is a first cooling pipe provided so as to surround the burner body in a state of being in contact with the periphery of the burner body from the inner end of the burner body toward the furnace wall side. When, toward either et furnace outside the opening, it is provided so as to surround said burner body with the first cooling tube, and provided so that the distance from the central axis of the burner body is greater than the first cooling tube And the second cooling pipe is positioned on the outer side in the radial direction of the first cooling pipe in a plane perpendicular to the central axis of the burner body in the opening .

When the installation position of the second cooling pipe is provided so that the distance from the center axis of the burner body is larger than that of the first cooling pipe, the second cooling pipe is opened by the second cooling pipe when projected onto the opening. It can be positioned so as to close the part. As a result, a region where the outside of the furnace can be directly seen from the inside of the furnace through the gap between the second cooling pipe and the opening can be reduced or eliminated, and radiation and slag due to the flame in the furnace can be moved from the gap to the outside of the furnace. Leakage can be prevented as much as possible.
The first cooling pipe and the second cooling pipe may be separate pipes, or may be a common series of pipes. Even when the first cooling pipe and the second cooling pipe are separate pipes, they may be connected and communicated after installation.
The second cooling pipe is provided, for example, so as to have a substantially frustoconical shape that is divergent so that the distance from the central axis of the burner body increases sequentially as it goes from the vicinity of the opening to the outside of the furnace.
The “distance from the center axis of the burner body” means the shortest distance from the center axis of the burner body. Specifically, the distance from the center axis measured in a plane perpendicular to the center axis of the burner body means.
Moreover, that the 1st cooling pipe contacts the circumference | surroundings of a burner main body means that it contacts thermally, and it means only that a burner main body and the 1st cooling pipe are directly contacting in a strict meaning. Instead, it means that, for example, a brazing material used at the time of connection may be interposed.

  Further, in the burner of the present invention, the first cooling pipe is installed in a state of being positioned with respect to the burner body, and the second cooling pipe is installed in a state of being positioned with respect to the furnace wall side. It is characterized by that.

The tip position of the burner body is an important factor that determines the combustion state in the furnace. Since the first cooling pipe is positioned with respect to the burner body at the time of installation, the position of the first cooling pipe is determined with the installation of the burner body. On the other hand, the second cooling pipe is installed in a state of being positioned with respect to the furnace wall side, not the burner body, and is not affected by the installation position of the burner body. Thereby, the installation position of a 2nd cooling pipe can be determined independently with respect to the opening part formed in the furnace wall, and the clearance gap between a 2nd cooling pipe and an opening part can be managed accurately.
In the case of the present invention, the first cooling pipe and the second cooling pipe are respectively separate pipes, and may be connected to each other after installation to flow the cooling medium in series as a common cooling medium system, Each may be connected to an independent cooling medium system and the cooling medium may flow in parallel.

  Furthermore, the burner according to the present invention is characterized in that the first cooling pipe can be detached from the burner body toward the inside of the furnace after installation.

It was decided that the first cooling pipe could be removed after installation. Thereby, it is possible to remove only the first cooling pipe that is installed in the furnace and has a high thermal load and is quickly deteriorated. Moreover, since it can remove with respect to a burner main body, the process which removes a burner main body becomes unnecessary, and the replacement time of a 1st cooling pipe can be shortened significantly. In addition, since the first cooling pipe can be removed toward the inside of the furnace, it is only necessary to access it from the inside of the furnace and pull it out. For example, there is no need to remove a seal box or piping installed outside the furnace, making it extremely simple. In addition, the replacement work of the first cooling pipe can be performed.
In addition, when the second cooling pipe is projected onto the opening, the second cooling pipe is installed so as to close the opening with the second cooling pipe, so that it is difficult to take out from the opening to the inside of the furnace. Yes. Further, since the second cooling pipe is not installed in the furnace like the first cooling pipe, the heat load is low and the replacement frequency is not so high as the first cooling pipe. Therefore, in the present invention, only the first cooling pipe can be removed while the second cooling pipe can be left without being removed.

  Moreover, the combustion furnace of this invention is equipped with the burner described in any one of the above.

Since the above burner is provided, it is possible to provide a combustion furnace that can prevent radiation and slag due to flame in the furnace from leaking from the opening to the outside of the furnace as much as possible.
In addition, a combustion furnace that can determine the installation position of the second cooling pipe independently of the opening formed in the furnace wall and can accurately determine the gap between the second cooling pipe and the opening. Can be provided.
Further, by removing the first cooling pipe from the burner body, it is possible to provide a combustion furnace in which the replacement work of the first cooling pipe is simplified.
The combustion furnace is, for example, a gasifier that gasifies carbon-containing fuel (more preferably, a coal gasifier that gasifies coal). In this case, the burner is used as a combustor burner. It is preferable.

The burner assembling method of the present invention comprises a burner main body installed through an opening formed in a furnace wall of a combustion furnace, and a cooling pipe for cooling the burner main body with a cooling medium flowing inside. In the burner provided, the cooling pipe is provided so as to surround the burner body in a state of being in contact with the periphery of the burner body from the tip inside the furnace of the burner body toward the furnace wall side. a tube, subjected either et furnace outside the opening, is provided so as to surround said burner body with the first cooling tube, and as the distance from the central axis of the burner body is greater than the first cooling tube A burner assembly method comprising a second cooling pipe provided, wherein the first cooling pipe is installed in a state of being positioned with respect to the burner main body, and the second cooling pipe is connected to the opening. In the department In the plane perpendicular to the central axis line of the serial burner body, said first and is positioned radially outward of the cooling tube, characterized in that it placed in a state of being positioned with respect to the furnace wall side.

The burner repair method of the present invention comprises a burner body installed through an opening formed in a furnace wall of a combustion furnace, and a cooling pipe for cooling the burner body by a cooling medium flowing through the inside. In the burner provided, the cooling pipe is provided so as to surround the burner body in a state of being in contact with the periphery of the burner body from the tip inside the furnace of the burner body toward the furnace wall side. a tube, subjected either et furnace outside the opening, is provided so as to surround said burner body with the first cooling tube, and as the distance from the central axis of the burner body is greater than the first cooling tube and a second cooling tube provided in the plane perpendicular to the central axis of the burner body in said opening, a method of repairing a burner which is located radially outward of the first cooling tube, The serial first cooling tube, and wherein the removing toward the furnace interior to said burner body.

When the installation position of the second cooling pipe is provided so that the distance from the center axis of the burner body is larger than that of the first cooling pipe, the second cooling pipe is opened by the second cooling pipe when projected onto the opening. Since it is positioned so as to block the part, the region where the outside of the furnace can be directly seen from the inside of the furnace through the gap between the second cooling pipe and the opening can be reduced or eliminated, and the flame inside the furnace Radiation and slag can be prevented as much as possible from leaking out of the furnace through the gap.
While the first cooling pipe is positioned with respect to the burner main body at the time of installation, the second cooling pipe is positioned with respect to the furnace wall rather than the burner main body. On the other hand, it can be determined independently of the burner body, and the gap can be managed with high accuracy.
Since the first cooling pipe can be removed from the burner body after installation, the first cooling pipe installed in the furnace and having high heat load and quick deterioration can be removed separately from the burner body. One cooling pipe can be replaced.

It is the longitudinal cross-sectional view which showed the structure around the burner provided in the combustor of the coal gasification furnace which concerns on reference embodiment of this invention. It is the cross-sectional view cut | disconnected by the surface containing the center axis line of the burner main body of FIG. It is the figure which showed the state which looked at the burner of FIG.1 and FIG.2 from the furnace inner side. It is the longitudinal cross-sectional view which showed the structure around the burner provided in the combustor of the coal gasification furnace which concerns on 1st Embodiment of this invention. It is the cross-sectional view cut | disconnected by the surface containing the center axis line of the burner main body of FIG. It is the sectional side view by which the process of removing the 1st cooling pipe of the burner of FIG. 4 was shown. It is the sectional side view which showed the conventional burner. It is the figure which showed the state which anticipated the burner of FIG. 7 from the furnace inner side.

Embodiments according to the present invention will be described below with reference to the drawings.
[ Reference embodiment]
A reference embodiment of the present invention will be described below with reference to FIGS.
FIG. 1 shows a structure around a burner 3 used in a combustor 1 of a coal gasification furnace (combustion furnace). A coal gasification furnace partially burns pulverized coal pulverized by a coal pulverizer (not shown) to obtain a combustible gas. The combustor 1 generates combustion heat by burning pulverized coal, and supplies a heat amount necessary for a gasification reaction in a reductor (not shown) located on the downstream side and a heat amount for melting slag. .

  A plurality of burners 3 are provided around the combustor 1, and one of the burners 3 is shown in FIG. The burner 3 is inserted through an opening 11 formed in the furnace wall. As shown in FIGS. 2 and 3, the furnace wall includes a plurality of furnace wall tubes 9 extending in the vertical direction and provided in parallel, and a connection wall 10 connecting adjacent furnace wall tubes 9. It consists of and. Cooling water flows in the furnace wall tube 9. The opening 11 formed in the furnace wall is formed by bending a part of the furnace wall tube 9. Specifically, a part of the furnace wall tube 9 at a position corresponding to the opening 11 is bent outwardly and laterally. The adjacent furnace wall tubes 9 are also bent sequentially to form the opening 11 as shown in FIG. FIG. 1 shows a furnace wall tube 9 bent outside the furnace, and FIG. 2 shows a furnace wall tube 9 bent sideways.

The burner 3 includes a burner body 5 disposed from the outside of the furnace to the inside of the furnace, and a cooling pipe 7 wound around the burner body 5.
In the burner body 5, pulverized coal and air (primary air and secondary air) are circulated, and a flame is formed in the furnace by the pulverized coal and air supplied from the burner body 5. It has become.

The cooling pipe 7 is configured such that cooling water (cooling medium) circulates therein, and the first cooling pipe 7a disposed on the tip 5a side of the burner body 5 and the burner body 5 rather than the first cooling pipe 7a. And a second cooling pipe 7b disposed on the base end side (left side in FIG. 1).
The 1st cooling pipe 7a is arrange | positioned so that the burner main body 5 may be surrounded in the state which contact | connected the outer peripheral surface of the burner main body 5 in order to acquire heat conductivity. The installation area A of the first cooling pipe 7 a extends from the tip 5 a of the burner body 5 to the furnace wall side, more specifically, from the tip 5 a of the burner body 5 to the vicinity of the opening 11 and outside the opening 11. It is provided over the position.

The second cooling pipe 7b is continuously connected to the first cooling pipe 7a. That is, the first cooling pipe 7 a and the second cooling pipe 7 b are a series of continuous cooling pipes 7. The second cooling pipe 7b is provided such that the distance r2 from the central axis C of the burner body 5 is larger than the distance r1 from the central axis C to the first cooling pipe 7a. Here, the distances r1 and r2 mean the shortest distance from the central axis C, specifically, the distance measured in a plane orthogonal to the central axis C, that is, the radius.
Then, as the second cooling pipe 7b goes from the vicinity of the opening portion 11 to the outside of the furnace, the second cooling pipe 7b has a substantially truncated cone shape that is divergent so that the distance r2 from the central axis C of the burner body 5 increases sequentially. Is provided. With such a divergent shape, when the second cooling pipe 7b is projected onto the opening 11, the second cooling pipe 7b is positioned so as to close the opening 11 as shown in FIG. Can do. Thereby, the area | region which can anticipate the outside of a furnace directly from the inside of a furnace through the clearance gap between the 1st cooling pipe 7a and the opening part 11 can be made small or eliminated.
The installation area B of the second cooling pipe 7b is provided from the vicinity of the opening 11 to the outside of the furnace, more specifically from the position near the opening 11 and entering the outside of the furnace from the opening 11 and further to the outside of the furnace. ing.

A seal box 13 is provided outside the furnace so as to cover the opening 11 formed by the furnace wall tube 9. The seal box 13 is made of, for example, stainless steel. The seal box 13 is filled with a refractory material 15. As the refractory material 15, alumina or SiC is preferably used.
The seal box 13 and the refractory material 15 maintain the pressurized pressure in the furnace, and radiation and slag that inevitably leaks from the gap between the burner 3 and the opening 11 to the outside of the furnace. It is designed not to leak.

The burner 3 having the above configuration is used as follows.
Pulverized coal and air are supplied into the burner body 5 from a supply source (not shown), and an air-fuel mixture adjusted and mixed in the burner body 5 at a predetermined air ratio is ejected from the tip of the burner body 5. The air-fuel mixture ejected from the burner body 5 is charged into the fuel region that has already been formed in the furnace, and a desired combustion state is maintained.
In order to protect the burner body 5 from the combustion heat generated by the flame formed in the furnace, cooling water is caused to flow in the cooling pipe 7. The cooling water is supplied from a cooling water source (not shown), flows from the first cooling pipe 7a at the tip 5a of the burner body 5 to the second cooling pipe 7b, and flows out from the second cooling pipe 7b to the outside.

Next, the effect of this embodiment is demonstrated.
By installing the second cooling pipe 7b so that the distance r2 from the central axis C of the burner body 5 is larger than the distance r1 from the central axis C to the first cooling pipe 7a, the second cooling pipe 7b is provided. Can be positioned so as to close the opening 11 by the second cooling pipe 7b (see FIG. 3). This makes it possible to reduce or eliminate the region in which the outside of the furnace can be directly seen from the inside of the furnace through the gap between the second cooling pipe 7b and the opening 11, and the radiation and slag due to the flame in the furnace can be removed from the gap. It is possible to prevent leakage to the outside as much as possible.
In particular, even if a gap S (see FIG. 1) is formed between the first cooling pipe 7a and the opening, the second cooling pipe 7b can eliminate a region where the outside of the furnace is directly expected from the inside of the furnace. Radiation and slag can be prevented from flowing directly into the seal box 11. This is because there is no second cooling pipe 7b having a divergent shape as in the present embodiment as in the prior art shown in FIGS. Compared with the case where it is possible to expect, there is a remarkable effect.

First Embodiment
Next, a first embodiment of the present invention will be described with reference to FIGS.
This embodiment is different from the reference embodiment in the arrangement and configuration of the first cooling pipe 7a and the second cooling pipe 7b. Other common configurations are denoted by the same reference numerals and description thereof is omitted.

The first cooling pipe 7 a of the present embodiment is fixed and positioned with respect to the burner body 5. On the other hand, the second cooling pipe 7b is not directly fixed to the burner body 5, but is fixed to the furnace wall side, specifically, to the seal box. However, the 1st cooling pipe 7a and the 2nd cooling pipe 7b are attached in series in the state which connected. That is, the second cooling pipe 7b is indirectly fixed to the burner body 5 via the first cooling pipe 7a, but is not directly fixed. Note that the first cooling pipe 7a and the second cooling pipe 7b may be connected in parallel to separate cooling water sources instead of being connected in series.
The cooling water is guided to the distal end side (right side in FIG. 4) of the first cooling pipe 7a, then flows in the first cooling pipe 7a toward the proximal end side (left side in FIG. 4), and then the second cooling. After being guided to the tip end side (right side in FIG. 4) of the pipe 7b and flowing through the second cooling pipe 7b, it flows out to the outside.

  As shown in FIGS. 4 and 5, the first cooling pipe 7 a is disposed so as to surround the burner body 5 in contact with the outer peripheral surface of the burner body 5 in order to obtain heat conductivity. The installation area A of the first cooling pipe 7a extends from the tip 5a of the burner body 5 to the furnace wall side, more specifically, near the opening 11 formed by the furnace wall pipe 9 from the tip 5a of the burner body 5 and opens. It is provided from the part 11 to a position that enters the outside of the furnace.

The second cooling pipe 7b is provided such that the distance r2 from the central axis C of the burner body 5 is larger than the distance r1 from the central axis C to the first cooling pipe 7a. Specifically, the second cooling pipe 7b has a substantially frustoconical shape that is divergent so that the distance r2 from the central axis C of the burner body 5 gradually increases as it goes from the vicinity of the opening 11 to the outside of the furnace. It is provided to become. By setting it as such a divergent shape, when the 2nd cooling pipe 7b is projected on the opening part 11, it can be located so that the opening part 11 may be plugged up with the 2nd cooling pipe 7b. Thereby, the area | region which can anticipate the outside of a furnace directly from the inside of a furnace through the clearance gap between the 2nd cooling pipe 7b and the opening part 11 can be made small or can be eliminated. This point is almost the same as that of the reference embodiment as described with reference to FIG.

However, this embodiment is different from the reference embodiment in the following points.
The installation area B of the second cooling pipe 7b of the present embodiment is provided from substantially the same position as the opening 11 to the outside of the furnace. This is different from the reference embodiment (see FIG. 1) in which the second cooling pipe 7b is provided from a position that enters the outside of the furnace from the opening 11. That is, the 2nd cooling pipe 7b of this embodiment is provided in the position offset in the furnace inner side rather than the reference embodiment.
Further, the second cooling pipe 7b of the present embodiment is located on the outer peripheral side of the first cooling pipe 7a when viewed in a plane orthogonal to the central axis C of the burner body 5. That is, the 2nd cooling pipe 7b of this embodiment is provided in the state overlapped and overlapped on the diameter direction outside of the 1st cooling pipe 7a. Therefore, the gap S ′ (see FIGS. 4 and 5) between the second cooling pipe 7b and the opening 11 of the present embodiment is smaller than the gap S (see FIGS. 1 and 2) of the reference embodiment. Yes. Thereby, in this embodiment, the radiation and slag which may flow in from clearance S 'can be reduced significantly.

Next, the assembly method of the burner 3 of this embodiment is demonstrated.
First, when the burner 3 is newly attached, the burner main body 5 in which the first cooling pipe 7a is fixed and positioned and integrated is inserted into the opening 11 formed in the furnace wall. And the burner main body 5 is fixed with respect to the furnace wall side so that the protrusion amount T to the furnace of the front-end | tip 5a of the burner main body 5 may become a desired value. Since this protrusion amount T becomes an important factor for determining the combustion state in the furnace by the burner 3, it must be managed with high accuracy.
Then, the 2nd cooling pipe 7b fixed to the furnace outer side is installed, and the position of the 2nd cooling pipe 7b is determined. And it connects so that the downstream of the 1st cooling pipe 7a and the upstream of the 2nd cooling pipe 7b may be connected.

As described above, since the first cooling pipe 7a and the second cooling pipe 7b are separately installed and positioned and then connected, the following effects can be obtained.
Since the burner body 5 is positioned with priority given to the protruding amount T of the burner body 5 that determines the combustion state in the furnace, a desired combustion state by the burner 3 can be ensured. On the other hand, the 2nd cooling pipe 7b is installed in the state positioned with respect to the furnace wall side instead of the burner main body 5, and is not influenced by the installation position of the burner main body 5. . Thereby, the installation position of the 2nd cooling pipe 7b can be determined independently with respect to the opening part 11, and the clearance gap S 'between the 2nd cooling pipe 7b and the opening part 11 can be managed accurately. That is, the first cooling pipe 7a fixed to the burner body 5 avoids determining the gap with the opening 11 by the first cooling pipe 7a, and is installed independently from the installation of the burner body 5. The gap S ′ can be adjusted by the second cooling pipe 7b that can be made, and the gap S ′ can be made as small as possible.

Next, a repair method for removing and replacing the first cooling pipe 7a after using the burner 3 for a predetermined time will be described.
As shown in FIG. 6, first, the first cooling pipe 7 a and the second cooling pipe 7 b are cut and separated at a cutting position D outside the seal box 13. Then, while leaving the burner body 5 and the second cooling pipe 7b, that is, with the burner main body 5 and the second cooling pipe 7b connected, the first cooling pipe 7a is removed by accessing from the inside of the furnace.
And a new 1st cooling pipe 7a is inserted and fixed with respect to the burner main body 5, and an exchange process is completed by connecting so that it may connect with the 2nd cooling pipe 7b.

In this way, the first cooling pipe 7a can be removed after installation. Thereby, the 1st cooling pipe 7a installed in a furnace and having high heat load and quick deterioration can be removed. Moreover, since it can remove with respect to the burner main body 5, the process of removing the burner main body 5 becomes unnecessary, and the replacement time of the 1st cooling pipe 7a can be shortened significantly. In addition, since the first cooling pipe 7a can be removed toward the inside of the furnace, it only needs to be accessed and pulled out from the inside of the furnace, and there is no need to remove, for example, the seal box 13 or piping installed outside the furnace, The replacement work of the first cooling pipe 7a can be performed very simply.
Moreover, since the 2nd cooling pipe 7b is installed so that the opening part 11 may be plugged up when it projects with respect to the opening part 11 (refer FIG. 3), it becomes difficult to take out from the opening part 11 inside a furnace. ing. Further, since the second cooling pipe 7b is not installed in the furnace like the first cooling pipe 7a, the heat load is not so high as the first cooling pipe 7a and the replacement frequency is not high. Therefore, in the present embodiment, while only the first cooling pipe 7a is removed, the second cooling pipe 7b can be left without being removed, and the replacement work can be further simplified.

  In each of the above-described embodiments, the description has been made on the assumption of a coal gasification furnace that gasifies coal. However, the present invention is not limited to this, and is not limited to coal as long as it is a carbon-containing fuel. If it is a furnace with combustion, it is not limited to a gasification furnace, but can be widely applied to combustion furnaces using burners.

DESCRIPTION OF SYMBOLS 1 Combustor 3 Burner 5 Burner main body 7 Cooling pipe 7a 1st cooling pipe 7b 2nd cooling pipe 9 Furnace wall pipe 10 Connection wall 11 Opening part 13 Seal box 15 Refractory material C Center axis S, S 'Gap

Claims (6)

A burner body installed through an opening formed in the furnace wall of the combustion furnace;
A cooling pipe for cooling the burner body with a cooling medium flowing through the inside;
In the burner with
The cooling pipe is
A first cooling pipe provided so as to surround the burner body in a state of being in contact with the periphery of the burner body from the tip inside the furnace of the burner body toward the furnace wall side;
Toward either et furnace outside the opening, it is provided so as to surround said burner body with the first cooling tube, and the distance from the central axis of the burner body is provided to be larger than the first cooling tube A second cooling pipe;
Equipped with a,
The second cooling pipe is located on a radially outer side of the first cooling pipe in a plane perpendicular to the central axis of the burner body in the opening . The first cooling pipe is installed in a state of being positioned with respect to the burner body,
The burner according to claim 1, wherein the second cooling pipe is installed in a state of being positioned with respect to the furnace wall side.   The burner according to claim 2, wherein the first cooling pipe is removable from the burner body toward the inside of the furnace after installation.   A combustion furnace comprising the burner according to any one of claims 1 to 3. A burner body installed through the opening formed in the furnace wall of the combustion furnace;
A cooling pipe for cooling the burner body with a cooling medium flowing through the inside;
In the burner with
The cooling pipe is
A first cooling pipe provided so as to surround the burner body in a state of being in contact with the periphery of the burner body from the tip inside the furnace of the burner body toward the furnace wall side;
Toward either et furnace outside the opening, it is provided so as to surround said burner body with the first cooling tube, and the distance from the central axis of the burner body is provided to be larger than the first cooling tube A second cooling pipe;
A method for assembling a burner comprising:
Installing the first cooling pipe in a state of being positioned with respect to the burner body;
In a state where the second cooling pipe is positioned on the outer side in the radial direction of the first cooling pipe on the surface perpendicular to the central axis of the burner body in the opening , and is positioned with respect to the furnace wall side. A method for assembling a burner, characterized in that it is installed. A burner body installed through the opening formed in the furnace wall of the combustion furnace;
A cooling pipe for cooling the burner body with a cooling medium flowing through the inside;
In the burner with
The cooling pipe is
A first cooling pipe provided so as to surround the burner body in a state of being in contact with the periphery of the burner body from the tip inside the furnace of the burner body toward the furnace wall side;
Toward either et furnace outside the opening, it is provided so as to surround said burner body with the first cooling tube, and the distance from the central axis of the burner body is provided to be larger than the first cooling tube A second cooling pipe;
A method of repairing a burner located on a radially outer side of the first cooling pipe in a plane perpendicular to the central axis of the burner body in the opening ,
A burner repairing method, wherein the first cooling pipe is removed from the burner body toward the inside of the furnace.

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