Strengthening members and structures, and methods for installing strengthening members

Abstract

This invention provides a strength member that reduces the possibility of variations in the dimensions of the gap between the inner liner and the casing. [Solution] A strength member 170 is positioned between an inner liner 110 that defines a flow path for a high-temperature fluid and a seal casing provided on the outside of the inner liner 110, and is fixed to a plurality of stud bolts 140 that are fixed to the inner liner 110 and extend toward the seal casing, and the strength member 170 maintains the distance between the plurality of stud bolts 140.

Description

Technical Field

[0001] The present disclosure relates to strength members, structures, and a method for installing strength members.

Background Art

[0002] Structures such as a heat recovery steam generator (HRSG) that generates steam by performing heat exchange with exhaust gas discharged from, for example, a gas turbine, have a multilayer structure so as to withstand high-temperature exhaust gas. The multilayer structure is configured, for example, in the order of an inner liner, an internal heat insulating material, a casing, an external heat insulating material, and an exterior plate from the inside (flow path side, furnace inside) (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Exhaust gas at about 600°C flows through the flow path defined by the inner liner. The temperature near the casing becomes about 300°C due to the internal heat insulating material. The inner liner is divided into a plurality of parts in order to absorb thermal expansion during operation / stop. The divided inner liners are fastened in a state where a part overlaps with other adjacent inner liners by stud bolts welded to the casing and are held together with the internal heat insulating material.

[0005] In such structures, if the internal insulation material falls out or deteriorates, creating gaps in the insulation, exhaust gas may penetrate through these gaps to the area near the casing, potentially causing a localized increase in the metal temperature of the casing. This can lead to thermal stress in the heated portion of the casing, potentially causing the casing to deform, for example, by bulging outwards (towards the outside of the furnace). As the deformation of the casing progresses, the reinforcing material attached to the outer surface of the casing (the surface facing the outside of the furnace) may rupture, potentially causing further deformation of the casing. Furthermore, since the inner liner is connected to the casing via stud bolts, if the casing deforms, the inner liner will also deform in accordance with the deformation of the casing.

[0006] If only the casing is replaced while deformation remains in the inner liner, the inner liner may bulge due to the deformation, potentially causing variations in the dimensions of the gap between the inner liner and the casing. Since internal insulation material is placed in this gap, variations in the dimensions of this gap can also cause variations in the thickness of the internal insulation material, potentially resulting in areas where the required thickness for thermal protection of the casing cannot be sufficiently secured. This could lead to a localized increase in the metal temperature of the casing in those areas. As a result, thermal stress may be generated by the localized increase in metal temperature, potentially causing the casing to deform again in a short period of time.

[0007] This disclosure has been made in view of these circumstances and aims to provide a strength member and structure, as well as a method for installing the strength member, that reduces the possibility of variations in the dimensions of the gap between the inner liner and the casing. [Means for solving the problem]

[0008] To solve the above problems, the following means will be adopted for the strength members, structures, and methods for installing the strength members.

[0009] A strength member according to one aspect of the present disclosure is a strength member disposed between an inner liner that defines a flow path through which a high-temperature fluid flows and a casing provided on the outside of the inner liner, the strength member being fixed to a plurality of protrusions that are fixed to the inner liner and extend toward the casing, and maintaining the distance between the plurality of protrusions.

[0010] A structure according to one aspect of this disclosure comprises a strength member, an inner liner, a casing, and a plurality of protrusions.

[0011] A method for installing a reinforcing member according to one aspect of the present disclosure is a method for installing a reinforcing member that is disposed between an inner liner that defines a flow path through which a high-temperature fluid flows and a casing provided on the outside of the inner liner, wherein the reinforcing member is fixed to a plurality of protrusions that are fixed to the inner liner and extend toward the casing in order to maintain the distance between the protrusions. [Effects of the Invention]

[0012] According to this disclosure, it is possible to reduce variations in the dimensions of the gap between the inner liner and the casing. [Brief explanation of the drawing]

[0013] [Figure 1] This is a cross-sectional view of a structure according to one embodiment of the present disclosure. [Figure 2] This is a magnified view of section F2 shown in Figure 1. [Figure 3] This diagram shows the inner liner before and after correction. [Figure 4] This diagram shows the inner liner with the reinforcing members installed. [Figure 5] This is a three-view drawing of the structural member. [Figure 6] This is a diagram showing the inner liner before correction. [Figure 7] This diagram shows the installation process of the structural members. [Figure 8]It is a diagram showing the installation process of the strength member. [Figure 9] It is a diagram showing an example of the arrangement of the strength member. [Figure 10] It is a schematic configuration diagram of a combined cycle plant.

Mode for Carrying Out the Invention

[0014] Hereinafter, a strength member, a structure, and a method for installing a strength member according to an embodiment of the present disclosure will be described with reference to the drawings.

[0015] The structure 100 is adopted, for example, in the casing of a heat recovery steam generator 12 (HRSG: Heat Recovery Steam Generator) through which high-temperature exhaust gas discharged from the gas turbine 11 flows. The heat recovery steam generator 12 is provided, for example, in the combined cycle plant 10.

[0016] As shown in FIG. 10, the combined cycle plant 10 includes a gas turbine 11, a heat recovery steam generator 12, and a steam turbine 13.

[0017] The gas turbine 11 has a compressor 21, a combustor 22, and a turbine 23. The compressor 21 and the turbine 23 are integrally rotatably connected by a rotating shaft (rotor) 24. The compressor 21 compresses the air taken in from the air intake line 25. The combustor 22 mixes and burns the compressed air supplied from the compressor 21 through the compressed air supply line 26 and the fuel gas supplied from the fuel gas supply line 27. The turbine 23 is rotationally driven by the high-temperature and high-pressure combustion gas supplied from the combustor 22 through the combustion gas supply line 28. The generator 29 is provided coaxially with the compressor 21 and the turbine 23, and can generate electricity when the turbine 23 rotates.

[0018] The waste heat recovery boiler 12 generates steam by exchanging heat between water and high-temperature exhaust gas discharged from the gas turbine 11 (turbine 23) via the exhaust gas discharge line 31. The temperature of the exhaust gas varies depending on the configuration of the combined cycle plant 10, but is generally around 500°C to 600°C, and in some cases can reach approximately 800°C. The waste heat recovery boiler 12 has multiple heat exchangers (for example, a superheater 32, an evaporator 33, and an economizer 34). The superheater 32, evaporator 33, and economizer 34 are arranged in a flow path 101 defined inside the structure 100. The flow path 101 is connected to the exhaust gas discharge line 31. The waste heat recovery boiler 12 generates steam by recovering heat from the exhaust gas from the gas turbine 11, which is introduced from the exhaust gas discharge line 31, as the exhaust gas passes through the boiler in the order of superheater 32, evaporator 33, and economizer 34.

[0019] Water is supplied to the economizer 34 from the condenser 47. The supplied water is heated in the economizer 34. The water heated in the economizer 34 is supplied to the evaporator 33, where it is heated. The steam generated by heating in the evaporator 33 is supplied to the superheater 32, where it is superheated. The steam superheated in the superheater 32 is supplied to the steam turbine 13.

[0020] The steam turbine 13 is rotationally driven by steam and has a turbine 42. A generator 43 is coaxially connected to the turbine 42. Superheated steam generated in the superheater 32 is supplied to the turbine 42 via a steam supply line 44, and the generator 43 can generate electricity as the turbine 42 rotates.

[0021] Steam discharged from the turbine 42 is supplied to the condenser 47 via the steam discharge line 46. The condenser 47 cools the recovered steam with cooling water to produce condensate. The condenser 47 sends the generated condensate to the economizer 34 via the condensate supply line 48. The condensate supply line 48 is also equipped with a condensate pump 49 for supplying condensate to the waste heat recovery boiler 12.

[0022] As shown in Figure 1, the cross-sectional shape of the structure 100 of the waste heat recovery boiler 12 (the cross-sectional shape in a plane approximately perpendicular to the direction of exhaust gas flow) is rectangular, and a flow path 101 through which exhaust gas flows is formed inside the structure 100. In Figure 1, the exhaust gas flows from the front to the back of the page.

[0023] As shown in Figures 1 and 2, the structure 100 comprises an inner liner 110, an internal insulation material 120, a seal casing (casing) 130, stud bolts (projections) 140, an external insulation material 150, and an exterior panel 160. The structure 100 has a multi-layer structure in which an inner liner 110, internal insulation material 120, sealing casing 130, external insulation material 150, and outer panel 160 are laminated in order from the inside (furnace side).

[0024] The inner liner 110 is a metal component that defines the flow path 101 through which exhaust gas flows on its inner side. Since the inner liner 110 is exposed to high-temperature exhaust gas, it is preferable that it be made of a material with better heat resistance than the seal casing 130. The inner liner 110 is, for example, divided into multiple panels, and the peripheral edges of these panels are configured to partially overlap each other and spread out in a planar manner. The inner liner 110 is secured to a stud bolt 140. The stud bolt 140 will be described later.

[0025] The internal heat-insulating material 120 is a component that has a heat-insulating function (thermal insulation function) and is placed on the outside (outside the furnace) of the inner liner 110. As shown in Figure 2, the internal insulation material 120 is composed of multiple layers laminated from the inner liner 110 toward the seal casing 130. In Figure 2, there are five layers (1st layer 121, 2nd layer 122, 3rd layer 123, 4th layer 124, 5th layer 125), and the thickness of each layer is approximately uniform. However, the number of layers and the thickness of each layer can be changed as appropriate.

[0026] The seal casing 130 is a metal component positioned outside the internal insulation material 120 so as to surround the inner liner 110. The seal casing 130 is positioned approximately parallel to the inner liner 110. The seal casing 130 has the function of maintaining the airtightness of the flow path 101. Stud bolts 140 are connected to the seal casing 130. The stud bolts 140 will be described later.

[0027] The external insulation material 150 is a component that has an insulating function (heat-insulating function) and is placed on the outside of the seal casing 130.

[0028] The exterior panel 160 is a component positioned on the outside of the external insulation material 150 so as to surround the seal casing 130. The exterior panel 160, for example, constitutes the external shape of the waste heat recovery boiler 12.

[0029] The stud bolt (projection) 140 is an axial member that extends along an axis X perpendicular to the seal casing 130 and toward the inner liner 110. Furthermore, the stud bolt 140 is also an axial member that extends along an axis X perpendicular to the inner liner 110 and toward the seal casing 130.

[0030] The base end of the stud bolt 140 is connected to the seal casing 130. The connection is made, for example, by welding.

[0031] The tip of the stud bolt 140 penetrates the internal insulation material 120 and the inner liner 110, reaching the flow path 101. The tip of the stud bolt 140 is fixed to the inner liner 110. The fastening is achieved, for example, by fastening. Specifically, the inner liner 110 through which the stud bolt 140 is inserted is sandwiched between washers 141 and 142, and then these washers 141 and 142 are sandwiched between nuts 143 and 144 that are compatible with the stud bolt 140 and tightened to fasten them.

[0032] As described above, the stud bolt 140 connects the seal casing 130 and the inner liner 110, and has the function of supporting the inner liner 110 with respect to the seal casing 130. Furthermore, the internal insulation material 120 is held in the gap between the seal casing 130 and the inner liner 110.

[0033] In the structure 100 configured in this way, localized temperature increases in the seal casing 130 due to deterioration or detachment of the internal insulation material 120 over time can cause deformation such as the seal casing 130 bulging outwards (outside the furnace). Furthermore, when deformation occurs in the seal casing 130, the inner liner 110, which is connected to the seal casing 130 via the stud bolts 140, also undergoes similar deformation, following the deformation of the seal casing 130 (left diagram in Figure 3). If, after such deformation occurs, only the seal casing 130 is replaced while the inner liner 110 still retains deformation, the inner liner 110 will have deformed to bulge, which may cause variations in the dimensions of the gap between the inner liner 110 and the seal casing 130. Since the internal insulation material 120 is placed in this gap, variations in the dimensions of the gap will also cause variations in the thickness of the internal insulation material 120, and in some cases, there may be areas where the thickness required for the thermal protection of the seal casing 130 cannot be sufficiently secured. In that case, the metal temperature of the seal casing 130 may rise locally in that area. As a result, thermal stress may be generated by the localized rise in metal temperature, and deformation of the seal casing 130 may recur in a short period of time.

[0034] Therefore, in this embodiment, a reinforcing member 170 is provided on the structure 100 to reduce the possibility of variations in the dimensions of the gap between the inner liner 110 and the seal casing 130 by correcting deformation that occurs in the inner liner 110 (see Figure 3), and / or making it difficult to deform the inner liner 110 when no deformation has occurred in the inner liner 110.

[0035] As shown in Figure 4, the reinforcing member 170 is positioned in the gap between the inner liner 110 and the seal casing 130 and is fixed to a plurality of stud bolts 140. Although two stud bolts 140 are shown in Figure 4, other stud bolts 140 may be provided above and / or below them.

[0036] As shown in Figure 5, the strength member 170 has, for example, a web portion (parallel surface portion) 171 and a flange portion (orthogonal surface portion) 172. The web portion 171 is a surface portion positioned substantially parallel to the inner liner 110. The flange portion 172 is connected to the web portion 171 and is a surface portion positioned substantially perpendicular to the web portion 171. By providing the flange portion 172, the bending strength of the strength member 170 is increased.

[0037] In Figure 5, the web portion 171 is rectangular, and the flange portion 172 is connected along one side of the web portion 171. Therefore, a so-called angle material can be used for the strength member 170. The shape of the strength member 170 is not limited to this. For example, the number and arrangement of the flange portions 172 may be changed.

[0038] The web portion 171 has through holes 171a through which each stud bolt 140 is inserted. Therefore, the arrangement of the through holes 171a follows the arrangement of the stud bolts 140 in question. The through-hole 171a has an inner diameter larger than the diameter of the stud bolt 140. This allows the strength member 170 to move slightly relative to the stud bolt 140, and to absorb the difference in thermal expansion that occurs between the inner liner 110 and the strength member 170.

[0039] The strength member 170, configured in this way, is fixed to a plurality of stud bolts 140, as shown in Figure 4. The fastening is achieved, for example, by fastening. Specifically, the web portion 171 through which the stud bolt 140 is inserted is sandwiched between washers 174 and 175, and then these washers 174 and 175 are sandwiched between nuts 144 and 176 that are compatible with the stud bolt 140 and tightened to fasten them. Note that nut 144 is also used to fasten the stud bolt 140 to the inner liner 110. In other words, nut 144 is in contact with both washer 142 and washer 174.

[0040] By fixing the reinforcing member 170 to multiple stud bolts 140, the distance between the multiple stud bolts 140 (interaxial distance) is regulated and maintained. For example, the axis X of one stud bolt 140 will not tilt or move relative to the axis X of another stud bolt 140. This reinforces the inner liner 110 to which each stud bolt 140 is fixed, thereby suppressing deformation of the inner liner 110.

[0041] The reinforcing member 170 is installed on the inner liner 110 in the following manner, for example.

[0042] As shown in Figure 6, the inner liner 110 is assumed to be deformed, for example, by bulging outwards from the furnace. In this case, the axes X of the two stud bolts 140 are separated from each other and are not parallel as they move away from the outer surface of the inner liner 110. Furthermore, the deformation of the inner liner 110 may be such that it bulges into the furnace. In this case, the axes X of the two stud bolts 140 move closer to each other as they move away from the outer surface of the furnace of the inner liner 110.

[0043] In order to attach the strength member 170, the stud bolts 140 are detached from the seal casing 130 beforehand. However, since the base end of the stud bolt 140 is welded to the seal casing 130, the stud bolt 140 is detached from the seal casing 130 by cutting the base end of the stud bolt 140. After detaching the seal casing 130, in order to restore the length of the stud bolt 140, a shaft-shaped member (not shown) is connected to the base end of the stud bolt 140 (the base end after cutting) to extend the stud bolt 140. Furthermore, the internal insulation material 120 is removed in order to install the reinforcing member 170.

[0044] In the state shown in Figure 6, the position of the base end of the stud bolt 140 does not coincide with the position of the through hole 171a formed in the web portion 171, so the strength member 170 cannot be fixed to the stud bolt 140 in this state. Therefore, as shown by the black arrows in Figure 6, a force F is applied to the inner liner 110 from the outside, and the shape of the inner liner 110 is temporarily corrected (returned to its original shape) as shown in Figure 7. This makes the axes X of the two stud bolts 140 temporarily approximately parallel. The method of applying force F is not particularly limited, but external devices such as hydraulic jacks or chain hoists can be used.

[0045] As shown in Figure 8, with the shape of the inner liner 110 temporarily corrected, the washer 174, the reinforcing member 170 (through hole 171a formed in the web portion 171), the washer 175, and the nut 176 are passed through the stud bolt 140 in this order.

[0046] By tightening the nut 176, the reinforcing member 170 is fixed to the inner liner 110, as shown in Figure 4. After that, force F is released. Even after force F is released, the reinforcing member 170 restricts the distance between the stud bolts 140 (the distance between axes), so the relationship between the axes X of the two stud bolts 140 (parallel state) is maintained, and the deformation of the inner liner 110 is maintained in a corrected state.

[0047] Once the reinforcing member 170 is fixed and the installation is complete, restoration work is carried out, such as reinstalling the internal insulation material 120 or connecting the seal casing 130 to the extended stud bolts 140.

[0048] Alternatively, the reinforcing member 170 may be installed on the inner liner 110 before deformation occurs. In this case, the reinforcing member 170 functions as a reinforcing member to prevent deformation of the inner liner 110 in advance.

[0049] As shown in Figure 9, there may be multiple reinforcing members 170. In the case of Figure 9, when the second direction (up and down direction in Figure 9) is perpendicular to the first direction (left-right direction in Figure 9) which is along the in-plane direction of the inner liner 110 (the direction perpendicular to the normal direction to the surface of the inner liner 110), six strength members 170 are arranged at equal intervals between two strength members 170 which extend in the first direction and are spaced apart in the second direction, and between two strength members 170 which extend in the second direction and are spaced apart in the first direction. It is preferable that the set including these multiple strength members 170 be installed, for example, to cover a region R of the inner liner 110 where the amount of deformation is large or a region R where the amount of deformation is expected to be large. The number and arrangement of the reinforcing members 170 can be appropriately changed depending on, for example, the size and shape of region R and the degree of deformation.

[0050] As shown in Figure 2, the internal insulation material 120 is composed of multiple layers (121, 122, 123, 124, 125). The reinforcing member 170 is preferably designed to fit within the first layer 121. Here, the first layer 121 is the layer in contact with the inner liner 110. By housing the reinforcing member 170 in the first layer 121, a gap is created in the first layer 121. However, this gap can be covered by the second layer 122 and subsequent layers (122, 123, 124, 125). This prevents high-temperature fluid from leaking out of the gap towards the seal casing 130.

[0051] This embodiment provides the following effects. The reinforcing member 170 is fixed to the inner liner 110 and to a plurality of stud bolts 140 that extend toward the seal casing 130, and maintains the distance between the plurality of stud bolts 140. As a result, the inner liner 110 is reinforced by the reinforcing member 170 connected via the stud bolts 140, and deformation of the inner liner 110 can be suppressed. As a result, the gap between the inner liner 110 and the seal casing 130 is maintained at a predetermined size, and the thickness of the internal insulation material 120 placed in the gap is maintained at or above the predetermined thickness required for the thermal protection of the seal casing 130, making it less likely for variations in thickness to occur. Consequently, the generation of thermal stress due to localized increases in the metal temperature of the seal casing 130 caused by variations in the thickness of the internal insulation material 120, and further deformation of the seal casing 130 caused by such thermal stress, are suppressed.

[0052] Multiple stud bolts 140 extend along an axis X that is approximately perpendicular to the inner liner 110, and the strength member 170 is fixed to the multiple stud bolts 140 with the axes X being approximately parallel to each other. This allows the area of ​​the inner liner 110 to which the stud bolts 140 are fixed to be straightened to a substantially planar shape.

[0053] The strength member 170 has a web portion 171 that is positioned substantially parallel to the inner liner 110, and at least one flange portion 172 that is connected to the web portion 171 and substantially perpendicular to the web portion 171. Since the web portion 171 is fixed to a plurality of stud bolts 140, the bending strength of the strength member 170 can be increased by the flange portion 172.

[0054] The internal insulation material 120 includes multiple layers 121, 122, 123, 124, and 125 that are laminated from the inner liner 110 toward the seal casing 130, and the strength member 170 is housed in the first layer 121 that is in contact with the inner liner 110. A gap is created in the first layer 121 due to the housing of the strength member 170, but this gap can be covered by the second layer 122 and subsequent layers. This prevents high-temperature fluid from leaking out of the gap.

[0055] [Note] The strength members and structures, as well as the method for installing the strength members, according to the embodiment described above, can be understood, for example, as follows.

[0056] A strength member (170) according to a first aspect of the present disclosure is a strength member (170) disposed between an inner liner (110) that defines a flow path (101) through which a high-temperature fluid flows and a casing (130) provided on the outside of the inner liner (110), and is fixed to a plurality of protrusions (140) that are fixed to the inner liner (110) and extend toward the casing (130), and maintains the distance between the plurality of protrusions (140).

[0057] The reinforcing member (170) is fixed to the inner liner (110) and to a plurality of projections (140) extending toward the casing (130), maintaining the distance between the multiple projections (140). As a result, the inner liner (110) is reinforced by the reinforcing member (170) connected via the projections (140), and deformation of the inner liner (110) can be suppressed. This maintains the gap between the inner liner (110) and the casing (130) at a predetermined size, so that the thickness of the insulation material (120) placed in the gap is maintained at or above the predetermined thickness required for the thermal protection of the seal casing (130), and variations in its thickness are less likely to occur. Consequently, the generation of thermal stress due to a local rise in the metal temperature of the casing (130) caused by variations in the thickness of the insulation material (120), and furthermore, deformation of the casing (130) caused by that thermal stress, is suppressed.

[0058] In the first embodiment, the strength member (170) according to the second aspect of the present disclosure has a plurality of projections (140) that extend along an axis (X) substantially perpendicular to the inner liner (110), and is fixed to the plurality of projections (140) in a state where the axes (X) are substantially parallel to each other.

[0059] The protrusions (140) extend along an axis (X) that is approximately perpendicular to the inner liner (110), and the reinforcing member (170) is fixed to the multiple protrusions (140) with the axes (X) being approximately parallel to each other. This allows the area of ​​the inner liner (110) to which the protrusions (140) are fixed to be corrected to be approximately planar.

[0060] A strength member (170) according to a third aspect of the present disclosure has, in the first or second aspect, a parallel surface portion (171) arranged substantially parallel to the inner liner (110), and at least one orthogonal surface portion (172) connected to the parallel surface portion (171) and substantially perpendicular to the parallel surface portion (171), wherein the parallel surface portion (171) is fixed to a plurality of projections (140).

[0061] The strength member (170) has a parallel surface portion (171) that is arranged substantially parallel to the inner liner (110), and at least one orthogonal surface portion (172) that is connected to the parallel surface portion (171) and substantially perpendicular to the parallel surface portion (171). Since the parallel surface portion (171) is fixed to a plurality of protrusions (140), the bending strength of the strength member (170) can be increased by the orthogonal surface portion (172).

[0062] A structure (100) according to a fourth aspect of this disclosure comprises a strength member (170) according to any of the first to third aspects, the inner liner (110), the casing (130), and a plurality of the protrusions (140).

[0063] A structure (100) can be provided that includes a strength member (170), an inner liner (110), a casing (130), and a plurality of protrusions (140).

[0064] A structure (100) according to a fifth aspect of the present disclosure, in a fourth aspect, comprises a thermal insulation material (120) disposed between the inner liner (110) and the casing (130), wherein the thermal insulation material (120) includes a plurality of layers laminated from the inner liner (110) toward the casing (130), and the strength member (170) is housed in the first layer (121) of the thermal insulation material (120) that is in contact with the inner liner (110).

[0065] The thermal insulation material (120) includes multiple layers laminated from the inner liner (110) toward the casing (130), and the reinforcing member (170) is housed in the first layer (121) of the thermal insulation material (120) that is in contact with the inner liner (110). A gap is created in the first layer (121) due to the housing of the reinforcing member (170), but this gap in the first layer (121) can be covered by the second layer (122) and subsequent layers. This prevents high-temperature fluid from leaking out of the gap.

[0066] In the sixth aspect of this disclosure, the structure (100) is configured such that, in the fourth or fifth aspect, high-temperature exhaust gas discharged from a gas turbine (11) flows through the flow path (101).

[0067] The structure (100) can be applied, for example, to a waste heat recovery boiler (12).

[0068] A method for installing a strength member (170) according to a seventh aspect of this disclosure is a method for installing a strength member (170) which is disposed between an inner liner (110) that defines a flow path (101) through which a high-temperature fluid flows and a casing (130) provided on the outside of the inner liner (110), wherein the strength member (170) is fixed to a plurality of projections (140) that are fixed to the inner liner (110) and extend toward the casing (130), and the strength member (170) is fixed to a plurality of projections (140).

[0069] In the seventh embodiment, the method for installing the strength member (170) according to the eighth aspect of this disclosure is as follows: the plurality of projections (140) extend along an axis (X) substantially perpendicular to the inner liner (110), and the strength member (170) is fixed to the plurality of projections (140) after the axes (X) of the plurality of projections (140) are made substantially parallel to each other. [Explanation of Symbols]

[0070] 10 Combined cycle plants 11 Gas Turbine 12. Waste heat recovery boiler 13 Steam Turbine 21 Compressor 22 Combustor 23 Turbines 29 Generators 31 Exhaust gas discharge line 32 Superheater 33 Evaporator 34 Economizer 42 Turbine 43 Generators 47 Condenser 49 Condensate pump 100 structures 101 Flow channel 110 Inner Liner 120 Internal heat insulation material (thermal insulation material) 130 Seal Casing 140 Stud bolt (protrusion) 141 Washer 142 Washer 143 Nut 144 nuts 150 External insulation 160 Exterior plate 170 Strengthening member 171 Web section (parallel surface section) 171a Through hole 172 Flange section (orthogonal surface section) 174 Washer 175 Washer 176 Nut X-axis (axis of the stud bolt)

Claims

1. A reinforcing member disposed between an inner liner that defines a flow path for a high-temperature fluid and a casing provided on the outside of the inner liner, It is fixed to the inner liner and fixed to a plurality of protrusions that extend toward the casing, and maintains the distance between the plurality of protrusions. Strengthening member.

2. The multiple protrusions extend along an axis substantially perpendicular to the inner liner, The axes are fixed to the multiple protrusions in a state where they are substantially parallel to each other. The strength member according to claim 1.

3. A parallel surface portion arranged substantially parallel to the inner liner, and At least one orthogonal surface connected to the parallel surface and substantially perpendicular to the parallel surface It has, The parallel surface portion is fixed to the plurality of protrusions. The strength member according to claim 1.

4. A strength member according to any one of claims 1 to 3, The inner liner and, The casing and, Multiple of the aforementioned protrusions, It is equipped with structure.

5. The inner liner and the casing are provided with an insulating material placed between them. The heat-insulating material includes a plurality of layers laminated from the inner liner toward the casing, The reinforcing member is housed in the first layer of the heat-insulating material that is in contact with the inner liner. The structure according to claim 4.

6. High-temperature exhaust gas discharged from the gas turbine flows through the aforementioned flow path. The structure according to claim 4.

7. A method for installing a reinforcing member, which is positioned between an inner liner that defines a flow path for a high-temperature fluid and a casing provided outside the inner liner, The reinforcing member is fixed to the multiple protrusions to maintain the distance between the multiple protrusions that are fixed to the inner liner and extend toward the casing. Method for installing structural members.

8. The multiple protrusions extend along an axis substantially perpendicular to the inner liner, The axes of the multiple protrusions are made substantially parallel to each other, and then the reinforcing member is fixed to the multiple protrusions. The method for installing the strength member according to claim 7.

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