Pipe support structure and mounting position modification method

Abstract

This invention provides a pipe support structure and a method for changing the mounting position that allows the position of an insert to be changed without requiring major modifications to the pressure vessel or pipe support. [Solution] The system comprises a pipe support body 310 connected to a pressure vessel 120, with an insertion hole 313 formed therein for inserting a burner 200 from the outside to the inside of the pressure vessel 120, and a sealing member 320 provided at the end 312 of the pipe support body 310 to close the insertion hole 313, wherein an opening 321 for inserting the burner 200 and positioning the burner 200 is formed in the sealing member 320, and the central axis Co of the opening 321 is eccentric with respect to the central axis Ch of the insertion hole 313 of the pipe support body 310.

Description

Technical Field

[0001] The present disclosure relates to a pipe stand structure and a method for changing the mounting position.

Background Art

[0002] For example, the two-stage gasification furnace described in Patent Document 1 is generally composed of a furnace body as a container, an upper burner group, and a lower burner group. The furnace body has a cylindrical shape with a substantially constant cross-sectional area, and a gas outlet for导出 the gas generated inside the furnace body is opened at the top thereof.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The furnace body described in Patent Document 1 employs, for example, a double-wall structure having a water-cooled wall and a pressure vessel arranged so as to surround the water-cooled wall. At this time, when inserting an insert (for example, burners) from the outside to the inside of the pressure vessel, for example, a pipe stand may be welded to the pressure vessel, and the insert may be inserted into the inside of the pressure vessel through an insertion hole formed in the pipe stand.

[0005] When it is desired to change the position (for example, the height position) of the insert, this can be achieved by changing the position of the pipe stand. However, when changing the position of the pipe stand joined to the pressure vessel, a large-scale modification of the pressure vessel is required. Furthermore, if the pressure vessel is large and heavy, it can be difficult to transport it from the site (where the pressure vessel is installed) to the factory for processing. In such cases, portable processing machines are brought to the site and the pressure vessel is processed there. However, there are limitations to the capabilities and precision of portable processing machines, which can lead to long processing times and make it difficult to perform high-precision processing. Furthermore, if the position of the pipe support is changed and the pipe support is welded back to the pressure vessel, records such as strength calculations, material verification certificates, heat treatment, and non-destructive testing will be required to meet the legal requirements for the pressure vessel. Furthermore, when conducting pressure resistance tests and airtightness tests required by the standards, there is a challenge in that the larger the pressure vessel, the larger and larger the pressurizing source becomes.

[0006] This disclosure has been made in view of these circumstances and aims to provide a pipe support structure and a method for changing the mounting position that can change the position of an insert without making large-scale modifications to the pressure vessel or pipe support. [Means for solving the problem]

[0007] To solve the above problems, the following means will be employed for the pipe support structure and the method for changing the mounting position.

[0008] A pipe stand structure according to one aspect of the present disclosure comprises a pipe stand connected to the outer wall of a container, having an insertion hole formed therein for inserting an insert from the outside to the inside of the outer wall, and a sealing member provided at the end of the pipe stand to close the insertion hole, wherein an opening for inserting and positioning the insert is formed in the sealing member, and the central axis of the opening is eccentric with respect to the central axis of the insertion hole of the pipe stand.

[0009] A mounting position changing method according to one aspect of this disclosure is a method for changing the mounting position of an insert in the pipe support structure, wherein the mounting position of the insert is changed by changing the orientation of the sealing member with respect to the pipe support. [Effects of the Invention]

[0010] According to this disclosure, the position of the insert can be changed without making major modifications to the pressure vessel or pipe holder. [Brief explanation of the drawing]

[0011] [Figure 1] This is a schematic longitudinal cross-sectional view of a gasifier equipped with a pipe holder according to the first embodiment of this disclosure. [Figure 2] This is a cross-sectional view taken along the cutting line II-II shown in Figure 1. [Figure 3] This is a magnified view of section F3 shown in Figure 1. [Figure 4] This is a side view taken from arrow A4, as shown in Figure 3. [Figure 5] This is a magnified view of section F3 shown in Figure 1 (after changing the burner position). [Figure 6] This is a side view as seen from arrow A6, as shown in Figure 5. [Figure 7] This is a partially enlarged view of a schematic longitudinal cross-sectional view of a gasifier equipped with a pipe holder according to the second embodiment of this disclosure. [Figure 8] This is a side view of the sealing member according to modified example 7. [Modes for carrying out the invention]

[0012] Hereinafter, a pipe support structure and a method for changing the mounting position according to one embodiment of this disclosure will be described with reference to the drawings.

[0013] [First Embodiment] The pipe support structure and mounting position modification method according to the first embodiment of this disclosure will be described below with reference to the drawings.

[0014] <Regarding the structure of the pipe stand> As shown in Figures 1 to 3, the gasifier 10 includes, for example, a container 100 in which a gasification section 101 and a quench section 102 are formed inside, a plurality of burners 200 inserted into the container 100, and a pipe support structure 300 for installing the burners 200 in the container 100.

[0015] As shown in FIG. 1, the vessel 100 constitutes the main body of the gasification furnace 10. The vessel 100 is, for example, substantially cylindrical with the axis X as the central axis. The axis X extends, for example, in the vertical direction. Inside the vessel 100, a gasification section 101 and a quench section 102 located below the gasification section 101 are formed.

[0016] The vessel 100 has a water-cooled wall 110 as an inner wall and a pressure vessel 120 as an outer wall covering the water-cooled wall 110. That is, the vessel 100 has a double-wall structure with the water-cooled wall 110 as the inner wall and the pressure vessel 120 as the outer wall.

[0017] The water-cooled wall 110 has, for example, a plurality of water-cooled tubes and fins connecting adjacent water-cooled tubes. The upper part of the water-cooled wall 110 is a throttle portion 111 with a reduced inner diameter. The lower surface of the throttle portion 111 is the ceiling 111a. The lower part of the water-cooled wall 110 is a slag tap 112 with a reduced inner diameter. The upper surface of the slag tap 112 is the furnace bottom (炉底112a).

[0018] The space above the slag tap 112 is the gasification section 101, and the space below the slag tap 112 is the quench section 102. That is, the inside of the water-cooled wall 110 is vertically divided by the slag tap 112, the upper space is the gasification section 101, and the lower space is the quench section 102. The gasification section 101 and the quench section 102 communicate with each other through an opening formed at the center of the slag tap 112. Thereby, the molten slag generated in the gasification section 101 can flow down from the opening to the quench section 102.

[0019] The pressure vessel 120 is a pressure-resistant vessel covering the water-cooled wall 110. A separation space S is formed between the water-cooled wall 110 and the pressure vessel 120. This separation space S is not in communication with the inside of the water-cooled wall 110 (gasification section 101).

[0020] Multiple burners 200, each having a horizontally extending central axis Cb, are inserted into the container 100 configured in this manner. Each burner 200 is a device that injects finely powdered fuel, obtained by crushing solid organic raw materials (for example, coal or biomass fuel), into the gasification unit 101 along with a gasifying agent such as oxygen, and burns it.

[0021] As shown in Figure 1, the burner 200 includes a lower burner 210 and an upper burner 220. The lower burner 210 is a burner 200 located near the bottom 112a of the furnace. On the other hand, the upper burner 220 is a burner 200 located above the lower burner 210 and near the ceiling 111a. As shown in Figure 2, for example, the lower burners 210 are evenly distributed around the axis X with respect to the peripheral walls (inner and outer walls) of the container 100. The nozzles at the tips of each lower burner 210 are not directed toward the axis X of the container 100, but are directed outward from the axis X. That is, the central axis Cb of each lower burner 210 does not intersect the axis X of the container 100. By arranging the lower burners 210 in this way, a swirling flow is formed in the gasification section 101. The upper burners 220 are arranged similarly.

[0022] The burner 200 is installed in the container 100 using a pipe support structure 300. The following explanation will use the lower burner 210 as an example. As shown in Figure 3, the pipe support structure 300 includes a pipe support body (pipe support) 310 and a sealing member 320.

[0023] The pipe support body 310 is a cylindrical member with an insertion hole 313 formed inside, and has a base end 311 and a tip end 312. The insertion hole 313 is a through hole having a central axis Ch extending horizontally, and is in communication with the separation space S through an opening 121 formed in the pressure vessel 120. The base end 311 is the end face facing the outer surface of the pressure vessel 120 and is joined to the pressure vessel 120 by welding. Therefore, a welded joint 311a is formed between the base end 311 and the pressure vessel 120. The tip 312 has a flange that extends radially with respect to the central axis Ch.

[0024] As shown in Figures 3 and 4, the sealing member 320 is a disc-shaped member. The sealing member 320 is provided at the tip 312 of the pipe support body 310 so as to close the insertion hole 313 of the pipe support body 310. At this time, the sealing member 320 is fixed (for example, by bolting) to a flange formed at the tip 312 of the pipe support body 310.

[0025] The sealing member 320 has a circular opening 321 formed therein. The opening 321 is a through-opening with a central axis Co extending horizontally and is in communication with the insertion hole 313. The opening 321 is also a through-opening for inserting the lower burner 210 and positioning it relative to the sealing member 320. The central axis Cb of the lower burner 210, once inserted into and positioned in the opening 321, approximately coincides with the central axis Co of the opening 321.

[0026] The lower burners 210, inserted into the opening 321, are inserted from the outside to the inside (separation space S) of the pressure vessel 120 via the insertion hole 313, and the nozzles at the tip of each lower burner 210 reach the inside of the water-cooled wall 110 (gasification section 101) through through holes provided in the water-cooled wall 110.

[0027] When the sealing member 320 is attached to the pipe support body 310, the central axis Co of the opening 321 is parallel to, but does not coincide with, the central axis Ch of the insertion hole 313. In other words, the central axis Co of the opening 321 is eccentric with respect to the central axis Ch of the insertion hole 313. In Figure 4, the central axis Co of the opening 321 is eccentric downward with respect to the central axis Ch of the insertion hole 313, and the amount of eccentricity is indicated by ε. As described above, since the central axis Co of the opening 321 is eccentric with respect to the central axis Ch of the insertion hole 313, the position of the opening 321 relative to the central axis Ch of the insertion hole 313 (i.e., the position of the lower burner 210) can be changed by changing the orientation of the sealing member 320. This makes it possible to change the position of the lower burner 210 without making large-scale modifications to the pressure vessel 120 or the pipe support body 310. Here, "changing the orientation of the sealing member 320" means, for example, rotating the sealing member 320 around the central axis Ch of the insertion hole 313, as shown in Figures 5 and 6.

[0028] In Figures 5 and 6, compared to Figures 3 and 4, the sealing member 320 is rotated around the central axis Ch of the insertion hole 313, thereby inverting the top and bottom of the sealing member 320. Figures 4 and 6 show black arrows indicating the angular position of the sealing member 320. In Figure 4, the black arrow points downward, and in Figure 6, it points upward. Since the eccentricity is ε, when the top and bottom of the sealing member 320 are inverted, the central axis Co of the opening 321 moves upward by 2ε. That is, the position of the central axis Cb of the lower burner 210 moves upward by 2ε. This changes the distance from the furnace bottom 112a to the central axis Cb of the lower burner 210. Specifically, the distance shown as h1 in Figure 3 becomes h2 (= h1 + 2ε) in Figure 5, allowing the lower burner 210 to be moved away from the furnace bottom 112a. Conversely, by performing the reverse operation, the lower burner 210 can be brought closer to the furnace bottom 112a again.

[0029] The inner diameter of the insertion hole 313 is set to be, for example, 1.5 times or more the outer diameter of the lower burner 210. This ensures a sufficient range of change in the mounting position of the lower burner 210. In this case, ε can be ensured to a maximum of 0.5 times or more the outer diameter of the lower burner 210. That is, the range of change in the mounting position of the lower burner 210 can be ensured to a maximum of approximately the same as or greater than the outer diameter of the lower burner 210. The inner diameter of the insertion hole 313 can be appropriately changed according to the required size of ε. Depending on the inner diameter of the insertion hole 313, it may be necessary to reinforce the opening of the pressure vessel 120 in accordance with standards for pressure vessels.

[0030] The upper burner 220 also employs a pipe support structure 300. This allows the upper burner 220 to be moved away from or closer to the ceiling 111a.

[0031] <Regarding the change in the height position of the lower burner 210> The distance from the furnace bottom 112a to the central axis Cb of the lower burner 210 affects the stability of molten slag discharge and the risk of burnout of the furnace bottom 112a. If the distance is too great, the heating effect of the lower burner 210 on the slag tap 112 is reduced, resulting in unstable discharge of molten slag. Furthermore, if the oxygen ratio (the ratio of the amount of oxygen to the amount of raw material supplied to the burner 200) is increased to compensate for this and increase the flame temperature, the efficiency of the gasification furnace 10 decreases. On the other hand, if the distance is too close, the furnace bottom 112a will become locally hot, increasing the risk of burnout. Also, the molten slag flows down the inner surface of the water-cooled wall 110 which is covered with refractory material, and the flowing molten slag functions as a coating layer. However, the lower the ash content in the raw material, the thinner the coating layer becomes, and the water-cooled wall 110 is exposed to an even more severe high-temperature environment. Based on the above, it is preferable to adjust the height of the lower burner 210 in consideration of the ash content in the raw material and the temperature of the molten slag to achieve both reliability and efficiency.

[0032] <Regarding the change in the height position of the upper burner 220> The distance from the ceiling 111a to the central axis Cb of the upper burner 220 affects the degree of growth of deposits and the risk of thinning of the ceiling 111a. If the distance is too great, the particle concentration in the space between the ceiling 111a and the upper burner 220 will increase, causing char to adhere to the ceiling 111a, or carbon flowers (unburned carbon deposits from the raw material) to grow from the tip of the upper burner 220, which can cause clogging of the nozzle. On the other hand, if the distance is too close, the ceiling 111a is not covered with fire-resistant material, which increases the risk of thinning due to high-temperature sulfur corrosion. Based on the above, it is preferable to adjust the height of the upper burner 220 in consideration of the amount of char generated and the sulfur content in the combustion gas to ensure reliability.

[0033] <Effects> An opening 321 for inserting and positioning the burner 200 is formed in the sealing member 320, and since the central axis Co of the opening 321 is eccentric with respect to the central axis Ch of the insertion hole 313 of the pipe stand body 310, the position of the opening 321 (i.e., the position of the burner 200) with respect to the central axis Ch of the insertion hole 313 can be changed by changing the orientation of the sealing member 320. This allows the position of the burner 200 to be changed without requiring major modifications to the pressure vessel 120 or the pipe support body 310. If the position of the burner 200 is changed, it may be necessary to modify the water-cooled wall 110, but modifying the water-cooled wall 110 is easier than modifying the pressure vessel 120, and does not pose a major problem.

[0034] If the inner diameter of the insertion hole 313 is 1.5 times or more the outer diameter of the burner 200, sufficient adjustment range for the mounting position of the burner 200 can be ensured.

[0035] [Second Embodiment] The pipe support structure and mounting position modification method according to the second embodiment of this disclosure will be described below with reference to the drawings. Note that components identical to those in the first embodiment are denoted by the same reference numerals as in the first embodiment, and their detailed descriptions are omitted.

[0036] As shown in Figure 7, the pipe support structure 300 has either or both of the packing material 340 and the gas supply section 350.

[0037] The filler 340 is a component that fills the space around the lower burner 210 (the gap in the insertion hole 313) inside the insertion hole 313. Examples of filler 340 include fire-resistant materials and heat-insulating materials.

[0038] A seal box 330 may be provided to cover the opening 121 of the pressure vessel 120, which is in communication with the insertion hole 313, from the inside of the pressure vessel 120, and the seal box 330 may be further filled with a filler 340.

[0039] The nozzle at the tip of the lower burner 210 reaches the interior of the water-cooled wall 110 (gasification section 101) through a through-hole provided in the water-cooled wall 110. In addition, the portion of the lower burner 210 located in the separation space S is covered by the burner outer cylinder 410 connected to the seal box 330. The inside of the burner outer casing 410 is not in communication with the separation space S. However, gas may flow into the inside of the burner outer casing 410 from the internal space of the water-cooled wall 110 (gasification section 101) through a through-hole provided in the water-cooled wall 110 (the through-hole into which the lower burner 210 is inserted). In this case, the gas flowing in from the gasification section 101 may flow through the gap between the lower burner 210 and the burner outer casing 410 to the insertion hole 313. Therefore, by filling the gap of the insertion hole 313 and the inside of the seal box 330 with filler material 340, gas is prevented from flowing into the gap of the insertion hole 313. If gas were to flow into the gap of the insertion hole 313, it could cause burnout or corrosion.

[0040] The gas supply unit 350 is a device that supplies an inert gas such as nitrogen around the lower burner 210 inside the insertion hole 313. By supplying the inert gas to the gap in the insertion hole 313, it prevents the gas flowing in from the gasification unit 101 from flowing into the gap in the insertion hole 313.

[0041] [Example 1] The pipe support structure 300 can be applied not only to the container 100 of the gasification furnace 10, but also to other containers such as reaction towers used under pressurized conditions.

[0042] [Differentiation 2] The inserted objects are not limited to the burner 200 (lower burner 210 or upper burner 220), but may also include, for example, instruments and sensors for measuring the internal conditions of the container (temperature, pressure, components, etc.), and cameras for observing the internal conditions of the container.

[0043] [Difference 3] The shape of the opening 321 formed in the sealing member 320 is not limited to a circle and can be appropriately changed according to the shape of the insert.

[0044] [Differentiation Example 4] The shape of the insertion hole 313 in the pipe support body 310 is not limited to a cylinder, and can be appropriately changed according to the shape of the inserted object.

[0045] [Difference 5] The method of fixing the sealing member 320 to the pipe support body 310 is not limited to bolt fastening, but any method such as clamp fastening or welding can be used.

[0046] [Modification 6] The insert inserted into the opening 321 of the sealing member 320 is fixed to the sealing member 320, but the method of fixing is not particularly limited.

[0047] [Difference 7] As shown in Figure 8, multiple openings 321 (321a, 321b) may be formed in a single sealing member 320. If the eccentricity of the first opening 321a is ε1 and the eccentricity of the second opening 321b is ε2, then ε1 ≠ ε2 is acceptable. Of the multiple openings 321, those that are not used (openings 321 into which the burner 200 is not inserted) should be closed with a closing flange, cover, or the like.

[0048] [Differentiation 8] Multiple sealing members 320, each having an opening 321 with a different eccentricity, may be prepared, and the position of the burner 200 may be changed by appropriately replacing the sealing members 320.

[0049] [Modification 9] The position of the burner 200 can be changed as needed within the insertion hole 313. For example, the position of the burner 200 may be changed not only in the height direction (vertical direction) but also in the horizontal direction, or in both the height direction and the horizontal direction. The position of the burner 200 can be arbitrarily adjusted by the orientation of the sealing member 320 and the position of the opening 321. In other words, the orientation of the sealing member 320 and the position of the opening 321 may be adjusted to match the desired position of the burner 200.

[0050] [Note] The pipe support structure and mounting position modification method described above can be understood, for example, as follows.

[0051] A pipe stand structure (300) according to a first aspect of the present disclosure comprises a pipe stand (310) connected to the outer wall (120) of a container (100) and having an insertion hole (313) formed therein for inserting an insert (200) from the outside to the inside of the outer wall (120), and a sealing member (320) provided at the end (312) of the pipe stand (310) so as to close the insertion hole (313), wherein an opening (321) for inserting the insert (200) and positioning the insert (200) is formed in the sealing member (320), and the central axis (Co) of the opening (321) is eccentric with respect to the central axis (Ch) of the insertion hole (313) of the pipe stand (310).

[0052] An opening (321) for inserting and positioning the insert (200) is formed in the sealing member (320), and since the central axis (Co) of the opening (321) is eccentric with respect to the central axis (Ch) of the insertion hole (313) of the pipe support (310), the position of the opening (321) relative to the central axis (Ch) of the insertion hole (313) (i.e., the position of the insert (200)) can be changed by changing the orientation of the sealing member (320). This makes it possible to change the position of the insert (200) without making large-scale modifications to the outer wall (120) or the pipe support (310).

[0053] In the first embodiment, the pipe support structure (300) according to a second aspect of this disclosure has an inner diameter of the insertion hole (313) that is 1.5 times or more the outer diameter of the insert (200).

[0054] Since the inner diameter of the insertion hole (313) is set to be 1.5 times or more the outer diameter of the insert (200), a sufficient amount of adjustment for the mounting position of the insert (200) can be ensured.

[0055] In the third aspect of this disclosure, the pipe support structure (300) is configured such that, in the first or second aspect, the number of openings (321) formed in the sealing member (320) is multiple.

[0056] Since there are multiple openings (321) formed in the sealing member (320), the position of the openings (321) relative to the central axis (Ch) of the insertion hole (313) (i.e., the mounting position of the insertion object (200)) can be changed by changing the position of the openings (321) into which the insert (200) is inserted, without changing the orientation of the sealing member (320).

[0057] A pipe support structure (300) according to a fourth aspect of this disclosure, in any of the first to third aspects, includes a filler material (340) that fills the space around the insert (200) inside the insertion hole (313).

[0058] Since the insertion hole (313) is equipped with a filler material (340) that fills the area around the insert (200), the possibility of gas flowing from the container (100) entering the gap inside the insertion hole (313) can be reduced.

[0059] A fifth aspect of the present disclosure of the pipe support structure (300) includes, in any of the first to fourth aspects, a gas supply unit (350) that supplies an inert gas around the insert inside the insertion hole (313).

[0060] Since the insertion hole (313) is equipped with a gas supply unit (350) that supplies inert gas around the insert, the possibility of gas flowing from the container (100) entering gaps inside the insertion hole (313) can be reduced.

[0061] The pipe stand structure (300) according to the sixth aspect of this disclosure is a double-wall structure in any of the first to fifth aspects, wherein the container (100) has an outer wall (120) and an inner wall (110) located inside the outer wall (120).

[0062] Since the container (100) has a double-wall structure with an outer wall (120) and an inner wall (110) located inside the outer wall (120), for example, a pipe support structure (300) can be adopted for the container (100) of a gasification furnace.

[0063] In the seventh aspect of this disclosure, the pipe support structure (300) is such that, in the sixth aspect, the insert (200) reaches the inside of the inner wall (110).

[0064] In the eighth aspect of this disclosure, the pipe stand structure (300) is such that the container (10) is a gasification furnace (10).

[0065] In the ninth aspect of this disclosure, the pipe support structure (300) is such that, in any of the first to eighth aspects, the insert (200) is a burner (200) applied to a gasifier (10).

[0066] A mounting position changing method according to the tenth aspect of this disclosure is a mounting position changing method for changing the mounting position of an insert (200) in a pipe support structure (300) according to any of the first to ninth aspects, wherein the mounting position of the insert (200) is changed by changing the orientation of the sealing member (320) with respect to the pipe support (310). [Explanation of Symbols]

[0067] 10 Gasifier 100 containers 101 Gasification Section 102 Quench section 110 Water cooling wall (inner wall) 111 Aperture section 111a Ceiling 112 Slug Tap 112a hearth bottom 120 Pressure vessel (outer wall) 121 Aperture 200 burner (insertion) 210 Lower burner 220 Upper burner 300 pipe stand structure 310 Pipe stand body (pipe stand) 311 Proximal end 311a Weld 312 Tip (end) 313 Insertion hole 320 Sealing member 321 Aperture 330 Seal Box 340 Filler 350 Gas Supply Department 410 Burner Outer Casing Cb central axis (central axis of the burner) Ch central axis (central axis of the insertion hole) Co central axis (central axis of the opening) S isolated space X axis

Claims

1. A pipe holder connected to the outer wall of a container, having an insertion hole formed therein for inserting an object from the outside of the outer wall toward the inside, A sealing member is provided at the end of the pipe holder so as to close the insertion hole, Equipped with, An opening is formed in the sealing member for inserting the insert and positioning the insert. The central axis of the opening is eccentric with respect to the central axis of the insertion hole in the pipe holder. Pipe stand structure.

2. The inner diameter of the insertion hole is set to be 1.5 times or more the outer diameter of the insert. The pipe stand structure according to claim 1.

3. The number of openings formed in the sealing member is multiple. The pipe stand structure according to claim 1.

4. Filling material that fills the space around the insert inside the insertion hole It is equipped with The pipe stand structure according to claim 1.

5. A gas supply unit that supplies inert gas around the insert inside the insertion hole. It is equipped with The pipe support structure according to claim 1 or 4.

6. The container has a double-wall structure, comprising an outer wall and an inner wall positioned inside the outer wall. The pipe stand structure according to claim 1.

7. The insert reaches the inside of the inner wall. The pipe stand structure according to claim 6.

8. The aforementioned container is a gasifier. The pipe stand structure according to claim 7.

9. The aforementioned insert is a burner applied to a gasifier. The pipe stand structure according to claim 8.

10. A method for changing the mounting position of an insert in a pipe support structure according to claim 1, The mounting position of the insert can be changed by changing the orientation of the sealing member relative to the pipe holder. How to change the mounting position.

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