Support structure of waste heat recovery boiler

Abstract

A support mechanism for a waste heat recovery boiler that can suppress cost increases while coping with high temperatures is provided. The support mechanism for a waste heat recovery boiler is suitable for a waste heat recovery boiler having a shell (5) with a shell structure in which waste gas (2) flows in a horizontal direction, a heat transfer tube assembly (9) suspended inside the shell, and a manifold (11) connected to the end of the heat transfer tube assembly. The support mechanism for the waste heat recovery boiler suppresses the swaying of the heat transfer tube assembly. It is characterized by having: a base (15) for maintaining the position of the manifold in the gas flow direction; a connecting body (14) welded to the manifold and combined with the base; a plurality of limiting members (17) provided on the base in a manner that clamps the manifold; and a transmission member (13) provided between the shell and the base for transmitting the force acting on the base to the shell.

Description

Technical Field

[0001] This invention relates to a support mechanism for suppressing the swaying of heat transfer tube assemblies installed in a waste heat recovery boiler. Background Technology

[0002] As a highly anticipated component of high-efficiency power generation, the composite power generation equipment first utilizes a gas turbine to generate electricity, and then uses a waste heat recovery boiler (HRSG) to recover heat from the exhaust gas discharged from the gas turbine. The steam generated in the HRSG then drives a steam turbine to generate electricity.

[0003] In this type of waste heat recovery boiler, multiple heat exchangers, such as superheaters, evaporators, and fuel savers, are typically installed inside the shell of the flue, which serves as the exhaust gas duct. Each heat exchanger consists of multiple heat transfer tubes arranged neatly along the flow direction of the exhaust gas. The upper and lower ends of each heat transfer tube are connected by upper and lower manifolds to form a heat transfer tube panel. Multiple heat transfer tube panels are arranged in series inside the shell along the flow direction of the exhaust gas, and each heat transfer tube panel is suspended from the upper wall of the shell by support beams.

[0004] Conventional vibration damping structures include those where a support mechanism is installed between the heat transfer tube panels and the shell, and the horizontal load borne by this support mechanism is transferred to the base of the shell, thereby reducing horizontal forces during earthquakes and other events. For example, in the vibration damping structure described in Patent Document 1, the upper manifolds of multiple heat transfer tube panels arranged in series relative to the exhaust gas flow direction are collectively connected to an upper base, and the upper base is supported below a support beam of the shell by a linkage-type connecting fitting, thereby transferring the horizontal load borne by the connecting fitting to the base via the support beam of the shell. Furthermore, the lower manifolds of multiple heat transfer tube panels are collectively connected to a lower base, and the lower base is supported by a reinforcing beam erected from the lower wall of the shell by a support fitting, thereby transferring the horizontal load borne by the support fitting to the base via the reinforcing beam.

[0005] Here, a connector welded to the outer circumference of the upper manifold is pinned to the upper base, thereby connecting the upper manifold to the upper base. Similarly, a connector welded to the outer circumference of the lower manifold is pinned to the lower base, thereby connecting the lower manifold to the lower base. It should be noted that in waste heat recovery boilers that generate steam by recovering heat from high-temperature exhaust gases, 9Cr steel is sometimes used as the manifold material due to its excellent high-temperature strength. In this case, the connectors welded to the outer circumference of both the upper and lower manifolds are also made of 9Cr steel, the same material used for the manifolds.

[0006] Prior art literature

[0007] Patent documents

[0008] Patent Document 1: Japanese Patent Application Publication No. 2009-79822 Summary of the Invention

[0009] The problem that the invention aims to solve

[0010] In recent years, with the increasing size and performance of gas turbines, exhaust gas temperatures have risen, especially near the inlet of the casing on the upstream side of the exhaust gas flow, where temperatures exceeding 650°C are predicted. However, when using 9Cr steel as the connecting material, its allowable stress is below 649°C. Therefore, when the exhaust gas temperature reaches above 650°C, the allowable tensile strength of 9Cr steel decreases, potentially compromising the supporting function of the connecting material for the heat transfer tube panels. It should be noted that if the connecting material is changed to a material with a higher allowable stress than 9Cr steel, such as stainless steel, the supporting function can be ensured even at temperatures above 650°C. However, in this case, the material of the manifold welded to the connecting material also needs to be stainless steel, which is more expensive than 9Cr steel, resulting in another significant cost increase.

[0011] The present invention was made in view of the actual situation of the prior art, and its purpose is to provide a support structure for a waste heat recovery boiler that can cope with high temperatures while suppressing cost increases.

[0012] Solution for solving the problem

[0013] To achieve the above objectives, the present invention relates to a support mechanism for a waste heat recovery boiler, applicable to waste heat recovery boilers, which include: a shell structure through which waste gas flows horizontally; a heat transfer tube assembly suspended inside the shell; and a manifold connected to the end of the heat transfer tube assembly. The support mechanism of the waste heat recovery boiler suppresses the swaying of the heat transfer tube assembly. The mechanism is characterized by comprising: a base for maintaining the position of the manifold in the gas flow direction; a connector welded to the manifold and attached to the base; multiple limiting members disposed on the base to clamp the manifold; and a transmission member disposed between the shell and the base to transmit the force acting on the base to the shell.

[0014] Invention Effects

[0015] The support mechanism of the waste heat recovery boiler according to the present invention can cope with the high temperature of the waste gas while suppressing cost increases. It should be noted that other issues, structures, and effects beyond those described above will become clear from the following description of the embodiments. Attached Figure Description

[0016] Figure 1This is a 3D view of the exterior of a waste heat recovery boiler.

[0017] Figure 2 This is a side view showing the internal structure of a waste heat recovery boiler.

[0018] Figure 3 It is a top view showing the arrangement of heat exchangers configured in a waste heat recovery boiler.

[0019] Figure 4 This is a side view showing the support mechanism on the upper manifold side.

[0020] Figure 5 This is a three-dimensional view showing the main parts of the support mechanism on the upper manifold side.

[0021] Figure 6 This is a front view showing the connection between the upper manifold and the upper base.

[0022] Figure 7 This is an explanatory diagram showing the upper connecting body.

[0023] Figure 8 This is an explanatory diagram showing the connection state between the upper long hole and the upper pin.

[0024] Figure 9 This is a side view showing the support mechanism on the lower manifold side.

[0025] Figure 10 This is a three-dimensional view showing the main parts of the support mechanism on the lower manifold side.

[0026] Figure 11 This is a front view showing the connection between the lower manifold and the lower base.

[0027] Figure 12 This is an explanatory diagram showing the lower connecting body.

[0028] Figure 13 This is an explanatory diagram showing the connection state between the lower pin and the lower long hole. Detailed Implementation

[0029] The following is for reference Figures 1 to 13 The following describes the embodiments of the present invention.

[0030] Figure 1 This is a 3D view of the exterior of a waste heat recovery boiler. Figure 2 This is a side view showing the internal structure of a waste heat recovery boiler. Figure 3 This is a top view showing the arrangement of heat exchangers configured in a waste heat recovery boiler.

[0031] like Figures 1-3As shown, the waste heat recovery boiler 1 has a channel 3 for guiding the exhaust gas 2 from a gas turbine (not shown). The channel 3 is supported on the ground by multiple frames 4. The channel 3 has a shell 5 with a shell structure consisting of upper and lower walls and left and right side walls. Inside the shell 5, multiple heat exchangers 6 such as superheaters, evaporators, and fuel savers, as well as a denitrification device 7, are arranged. The exhaust gas 2 discharged from the gas turbine is introduced into the interior of the shell 5 through the inlet of the channel 3, passes through the multiple heat exchangers 6 and the denitrification device 7 in sequence, and is discharged to the outside through the chimney 8. These heat exchangers 6 have multiple heat transfer tubes (heat transfer tube groups) 9 that extend vertically in a manner that intersects the flow direction of the exhaust gas 2. A steam-water separation cylinder 10 connected to the multiple heat transfer tubes 9 is arranged on the upper exterior of the shell 5.

[0032] Multiple heat transfer tubes 9 arranged in multiple rows along a horizontal direction orthogonal to the flow direction of exhaust gas 2 are connected to an upper manifold 11 at their upper ends and a lower manifold 12 at their lower ends, and are bundled together by a honeycomb support member (not shown) to form a heat transfer tube panel 9A. Each heat exchanger 6 is arranged within the housing 5 in such a way that the multiple rows of heat transfer tube panels 9A are unitized into a panel block. For example, in the heat exchanger 6 closest to the inlet of channel 3, two rows (two sheets) of heat transfer tube panels 9A arranged along the flow direction of exhaust gas 2 are unitized into a panel block. Moreover, in the second heat exchanger 6 counting from the inlet of channel 3, five rows (five sheets) of heat transfer tube panels 9A arranged along the flow direction of exhaust gas 2 are unitized into a panel block.

[0033] Each heat transfer tube panel 9A is suspended from the upper wall of the housing 5 via a support beam 5a and supported by a linkage-type connecting fitting 13 in the forward and backward direction of gas flow. In this embodiment, the heat transfer tube panels 9A arranged in the region where the exhaust gas temperature is 650°C or higher, that is, the two heat transfer tube panels 9A located on the upstream side of the exhaust gas 2 flow direction, are supported by the support beam 5a via the support mechanism described below. This suppresses the swaying of the heat transfer tube panels 9A in the forward and backward direction of gas flow.

[0034] First, based on Figures 4-8 This describes the support mechanism on the upper manifold side (upper support mechanism). Figure 4 This is a side view showing the support mechanism on the upper manifold side. Figure 5 This is a three-dimensional view showing the main parts of the support mechanism on the upper manifold side. Figure 6 This is a front view showing the connection between the upper manifold and the upper base. Figure 7 This is an explanatory diagram showing the upper connecting body. Figure 8 This is an explanatory diagram showing the connection state between the upper long hole and the upper pin.

[0035] As previously described, upper manifolds (manifolds) 11 are respectively installed on the upper ends of two heat transfer tube panels (heat transfer tube groups 9) 9A arranged in series relative to the flow direction of exhaust gas 2. Upper connectors (connectors) 14 are fixed to the outer circumferential surface of each upper manifold 11 by welding. 9Cr steel is used as the material for the upper manifolds 11, and to ensure welding strength, the upper connectors 14 also use the same 9Cr steel. Each upper connector 14 is pin-connected to an upper base (base) 15, which is supported below the support beam 5a located in the top portion of the housing 5 via a linkage-type connecting fitting (transmission member) 13.

[0036] The upper base 15 maintains the position of the upper manifold 11 in the gas flow direction and suppresses the swaying of the heat transfer tube panel 9A. The upper base 15 is constructed by joining and integrating the webs of a pair of channel steels (channel steels) at a predetermined interval, and two upper pins 16 are mounted across the two channel steels of the upper base 15. Furthermore, a base plate 15a is fixed to the center of the upper surface of the upper base 15, and the lower end of the connecting fitting 13 is connected to the base plate 15a.

[0037] like Figure 7 As shown, the upper connector 14 is composed of a plate-shaped member with a cut-out at its lower end forming an arc shape. This plate-shaped member has an upper circular hole 14a for the upper pin 16 to pass through. Furthermore, the cut-out arc-shaped portion is welded to the outer circumferential surface of the upper manifold 11. Moreover, as... Figure 5 As shown, an upper elongated hole 15b is provided in the upper base 15. With the upper pin 16 inserted through the upper elongated hole 15b and the upper circular hole 14a, the upper part of the upper connecting body 14 is positioned within the interval of the upper base 15 (between the webs of a pair of channel steels) (see reference). Figure 6 Here, the upper orifice 15b is in the direction of the exhaust gas 2 flow ( Figure 8 The upper pin 16 has a non-circular hole with its long axis (in the left-right direction) and a first gap t1 extending along the flow direction of the exhaust gas 2 is ensured between the upper pin 16 and the upper long hole 15b. The first gap t1 is the value obtained by adding the gaps t1a and t1b that exist on both sides of the upper pin 16 (t1 = t1a + t1b). Through this first gap t1, the horizontal load along the flow direction of the exhaust gas 2 is prevented from acting directly on the pin joint between the upper connector 14 and the upper base 15.

[0038] Three upper limiting members (limiting members) 17 are suspended at predetermined intervals on the lower surface of the upper base 15, and two upper manifolds 11 are sandwiched between these upper limiting members 17. The two upper limiting members 17 located at both ends of the upper base 15 are, for example, made of channel steel with the flanges cut at an angle, while the central upper limiting member 17 is made of plate-shaped steel. Furthermore, one upper manifold 11 is sandwiched between the flat web of the upper limiting member 17 at one end and the central upper limiting member 17, and the other upper manifold 11 is sandwiched between the flat web of the upper limiting member 17 at the other end and the central upper limiting member 17. It should be noted that the upper limiting members 17 can be of any structure other than those described above, as long as the upper manifolds 11 can be sandwiched. For example, the central upper limiting member 17 can also be made of cylindrical or cylindrical steel with recesses formed on its outer circumferential surface. Furthermore, the upper limiting members 17 on both ends can also be used in cylindrical steel welded elbows and other components to form a roughly L-shaped structure.

[0039] The upper limiting members 17 do not clamp the upper manifold 11 tightly; instead, the two upper limiting members 17 clamp the upper manifold 11 with a second gap t2 between them (see reference). Figure 4 The dimensional changes of the upper manifold 11 due to thermal expansion are absorbed by the second gap t2. It should be noted that the second gap t2 is a relatively small size, and the first gap t1, which is ensured between the upper pin 16 and the upper orifice 15b, is set to a value larger than the second gap t2 (t1>t2).

[0040] Next, based on Figures 9-13 This describes the support mechanism on the lower manifold side (lower support mechanism). Figure 9 This is a side view showing the support mechanism on the lower manifold side. Figure 10 This is a perspective view showing the main parts of the support mechanism on the lower manifold side. Figure 11 This is a front view showing the connection between the lower manifold and the lower base. Figure 12 This is an explanatory diagram showing the lower connecting body. Figure 13 This is an explanatory diagram showing the connection state between the lower pin and the lower long hole.

[0041] A lower manifold (manifold) 12 is provided at the lower end of two heat transfer tube panels (heat transfer tube group 9) 9A arranged in series relative to the flow direction of exhaust gas 2. A lower connector (connector) 18 is fixed to the outer circumferential surface of each lower manifold 12 by welding. Similar to the aforementioned upper manifold 11 and upper connector 14, both the lower manifold 12 and the lower connector 18 are made of 9Cr steel.

[0042] Each lower connector 18 is pin-connected to the lower base 19, which supports the lower base 19. The lower base 19 is slidably engaged with a support column (transfer member) 21 provided on the lower surface wall (bottom surface) of the housing 5 via a guide member 20. The support column 21 supports the horizontal force acting on the heat transfer tube panel 9A in the direction of exhaust gas flow due to earthquakes or exhaust gas pressure.

[0043] The lower base 19 maintains the position of the lower manifold 12 in the gas flow direction and is used to suppress the swaying of the heat transfer tube panel 9A. The lower base 19 is constructed by joining and integrating the webs of a pair of channel steels with a predetermined interval between them, and two lower pins 22 are mounted across the two channel steels of the lower base 19.

[0044] Two guide members 20, made of H-shaped steel, are fixedly installed on the lower surface of the lower base 19, extending vertically at a predetermined interval. A support column 21, also made of H-shaped steel, rises upwards from the lower surface wall of the housing 5. The support column 21 is inserted between the two guide members 20 with their flanges contacting each other, allowing the lower base 19 to move vertically using the flanges of the guide members 20 and the support column 21 as sliding surfaces. Furthermore, ribs 23, made of triangular-shaped plates, are fixed at the four corners of the upper surface of the support column 21, with the vertical surfaces of each rib 23 contacting the opposing flanges of the two guide members 20. This suppresses the tilting of the two guide members 20 relative to the vertical direction, thus preventing the lower base 19, which is orthogonal to the two guide members 20, from tilting relative to the horizontal direction.

[0045] like Figure 12 As shown, the lower connector 18 is composed of a plate-shaped member with an arc-shaped cut at its upper end. This plate-shaped member has a lower circular hole 18a for the lower pin 22 to pass through. Furthermore, the arc-shaped portion is welded to the outer circumferential surface of the lower manifold 12. Moreover, as... Figure 10 As shown, a lower elongated hole 19a is provided in the lower base 19. With the lower pin 22 inserted through the lower elongated hole 19a and the lower circular hole 18a, the lower part of the lower connecting body 18 is positioned within the interval of the lower base 19 (between the webs of a pair of channel steels) (see reference). Figure 11 Here, as Figure 13 As shown, the lower long hole 19a is a non-circular hole with the vertical direction as its long axis. A fifth gap S extending in the vertical direction is ensured between the lower pin 22 and the lower long hole 19a. Therefore, the difference in the elongation of the individual heat transfer tube panel 9A downwards in conjunction with the heating of the heat transfer tube assembly 9 is allowed by the fifth gap S.

[0046] Three lower limiting members (limiting members) 24 are suspended at predetermined intervals on the upper surface of the lower base 19, and two lower manifolds 12 are sandwiched between these lower limiting members 24. Similar to the aforementioned upper limiting member 17, the two lower limiting members 24 located at both ends of the lower connecting body 18 are made of channel steel with the flanges cut at an angle, while the central lower limiting member 24 is made of plate-shaped steel. Of course, the shape of the lower limiting members 24 is not limited to this. Furthermore, one lower manifold 12 is sandwiched between the flat web of the lower limiting member 24 at one end and the central lower limiting member 24, and the other lower manifold 12 is sandwiched between the flat web of the lower limiting member 24 at the other end and the central lower limiting member 24.

[0047] Furthermore, the lower limiting members 24 do not clamp the lower manifold 12 tightly; the two lower limiting members 24 clamp the lower manifold 12 with a fourth gap t4 between them (see reference). Figure 9 The dimensional changes of the lower manifold 12 accompanied by thermal expansion are absorbed by the fourth gap t4.

[0048] Here, as Figure 13 As shown, a third gap t3 (t3 = t3a + t3b) is provided between the lower pin 22 and the lower orifice 19a along the flow direction of the exhaust gas 2 (left-right direction in the figure). Similar to the support mechanism on the upper manifold side, this third gap t3 is set to a value larger than the fourth gap t4 (t3 > t4). It should be noted that the third gap t3 can be the same value as the first gap t1 mentioned above, or it can be a different value. Furthermore, the fourth gap t4 can be the same value as the second gap t2 mentioned above, or it can be a different value.

[0049] As described above, in the support structure of the waste heat recovery boiler 1 of this embodiment, the upper connector 14 welded to the upper manifold 11 and the upper base 15 supported on the upper wall side of the shell 5 via the connecting fitting 13 are pin-connected, and an upper limiting member 17 is provided to clamp the upper manifold 11. Therefore, the horizontal force in the front-back direction of the gas flow acting on the upper manifold 11 during an earthquake or similar event is not transmitted to the joint between the upper manifold 11 and the upper connector 14, but is borne by the upper limiting member 17 and the upper base 15, and transmitted to the foundation via the connecting fitting 13, the support beam 5a, and the frame 4. That is, the horizontal force generated during an earthquake or similar event does not act on the upper connector 14. Therefore, although 9Cr steel is used as the material for the upper manifold 11 and the upper connector 14, the swaying of the heat transfer tube panel 9A can be suppressed even under high temperature conditions of the exhaust gas 2, for example, exceeding 650°C. That is, the support function of the heat transfer tube panel 9A can be ensured.

[0050] Furthermore, in the support structure of the waste heat recovery boiler 1 in this embodiment, the lower connector 18 welded to the lower manifold 12 is pin-connected to the lower base 19, and the lower limiting member 24 that clamps the lower manifold 12 is provided on the lower base 19. Therefore, the horizontal force in the forward and backward direction of the gas flow acting on the lower manifold 12 during an earthquake is borne by the lower limiting member 24 and the lower base 19, and transmitted to the foundation via the support column 21, the support beam 5a, and the frame 4. That is, the horizontal force in the forward and backward direction of the gas flow generated during an earthquake is supported by the support column 21 and does not act on the lower connector 18. Therefore, similar to the support structure on the upper side, although 9Cr steel is used as the material for the lower manifold 12 and the lower connector 18, the swaying of the heat transfer tube panel 9A can be suppressed even under the high temperature conditions of the waste gas 2. That is, the support function of the heat transfer tube panel 9A can be more reliably ensured.

[0051] Furthermore, in the support mechanism of the waste heat recovery boiler 1 of this embodiment, the upper base 15 and the upper connecting body 14 are pin-connected by inserting upper pins 16 through the upper elongated hole 15b provided in the upper base 15 and the upper circular hole 14a provided in the upper connecting body 14. A first gap t1 extending along the flow direction of the exhaust gas 2 is ensured between these upper pins 16 and the upper elongated hole 15b. Therefore, by moving the upper pins 16 within the upper elongated hole 15b to absorb the horizontal load along the flow direction of the exhaust gas 2, it is possible to prevent the horizontal load from directly acting on the pin-connected portion of the upper connecting body 14 and the upper base 15.

[0052] Similarly, by inserting a lower pin 22 through the lower elongated hole 19a of the lower base 19 and the lower circular hole 18a of the lower connector 18, the lower base 19 and the lower connector 18 are pin-connected, ensuring a third gap t3 extending along the flow direction of the exhaust gas 2 between the lower pin 22 and the lower elongated hole 19a. Therefore, by moving the lower pin 22 within the lower elongated hole 19a to absorb the horizontal load along the flow direction of the exhaust gas 2, it is possible to prevent the horizontal load from directly acting on the pin-connected portion of the lower connector 18 and the lower base 19.

[0053] Furthermore, in the support mechanism of the waste heat recovery boiler 1 in this embodiment, the upper limiting member 17 is clamped into the upper manifold 11 through the second gap t2, and similarly, the lower limiting member 24 is clamped into the lower manifold 12 through the fourth gap t4. Therefore, the dimensional changes of the upper manifold 11 and the lower manifold 12 accompanied by thermal expansion can be absorbed through the second gap t2 and the fourth gap t4, respectively.

[0054] Furthermore, in the support mechanism of the waste heat recovery boiler 1 in this embodiment, the lower base 19 and the lower connector 18 are pin-connected by inserting a lower pin 22 through the lower elongated hole 19a provided in the lower base 19 and the lower circular hole 18a provided in the lower connector 18. A fifth gap S extending in the vertical direction is ensured between the lower pin 22 and the lower elongated hole 19a. Therefore, the fifth gap S allows for the downward elongation difference of the heat transfer tube assembly 9 during heating. In addition, a pair of guide members 20 fixed to the lower base 19 are slidably supported on a support column 21 that rises from the lower surface wall of the housing 5. A rib 23 that contacts the sliding surface of the guide member 20 is fixed on the upper surface of the support column 21, thus reliably preventing the lower base 19, which supports the horizontal force in the gas flow direction of the lower manifold 12, from tilting.

[0055] It should be noted that the present invention is not limited to the embodiments described above, but includes various modifications. The embodiments described above are for ease of understanding and are not necessarily limited to all the structures described.

[0056] For example, in the above embodiment, the support mechanism of the present invention was described as being applied to two rows of heat transfer tube panels 9A located on the upstream side of the flow direction of the exhaust gas 2. However, the same support mechanism can also be applied to other heat transfer tube panels 9A. Moreover, the number of upper manifolds 11 clamped by the upper limiting member 17 on the upper base 15 side and lower manifolds 12 clamped by the lower limiting member 24 on the lower base 19 side is not limited to two, and can be one row or three or more rows of heat transfer tube panels 9A.

[0057] In addition, in the above embodiment, regarding the relationship between using 9Cr steel as the material for the upper manifold 11 and the lower manifold 12, the materials for the upper connector 14 and the lower connector 18 welded to them are also 9Cr steel. However, as long as they are the same material as the upper manifold 11 and the lower manifold 12, steel other than 9Cr steel can also be used as the material for the upper connector 14 and the lower connector 18.

[0058] In addition, the support mechanism of the present invention may be applied only to the upper manifold 11, or it may be applied only to the lower manifold 12.

[0059] Label Explanation

[0060] 1 Waste heat recovery boiler

[0061] 2. Exhaust gas

[0062] 3 channels

[0063] 4. Framework

[0064] 5. Housing

[0065] 5a Supporting beam

[0066] 6. Heat exchanger

[0067] 7. Denitrification unit

[0068] 8 chimneys

[0069] 9 heat transfer tubes (heat transfer tube assembly)

[0070] 9A Heat Transfer Pipe Panel

[0071] 10. Steam-water separator cylinder

[0072] 11. Upper manifold (manifold)

[0073] 12 Lower header (header)

[0074] 13 Connecting Fittings (Transfer Components)

[0075] 14. Upper Connector (Connector)

[0076] 14a Upper circular hole (circular hole)

[0077] 15. Upper base (base)

[0078] 15a base plate

[0079] 15b upper long hole (long hole)

[0080] 16. Upper part pin (pin)

[0081] 17. Upper limiting member (limiting member)

[0082] 18. Lower connecting body (connector)

[0083] 18a Lower circular hole (circular hole)

[0084] 19. Lower base (base)

[0085] 19a Lower long hole (long hole)

[0086] 20 guiding components

[0087] 21 Support Columns (Transfer Components)

[0088] 22. Lower part pin (pin)

[0089] 23 ribs

[0090] 24. Lower limiting member (limiting member)

[0091] t1 First gap

[0092] t2 Second gap

[0093] t3 Third gap

[0094] t4 Fourth gap

[0095] S Fifth gap

Claims

1. A support mechanism for a waste heat recovery boiler, suitable for a waste heat recovery boiler comprising: a shell structure through which waste gas flows horizontally; a heat transfer tube assembly suspended inside the shell; and a manifold connected to the end of the heat transfer tube assembly, wherein the support mechanism of the waste heat recovery boiler suppresses the swaying of the heat transfer tube assembly, characterized in that, have: A base is used to maintain the position of the manifold in the gas flow direction; The connector is welded to the manifold and combined with the base; Multiple limiting members are disposed on the base in a manner that clamps the manifold in place; and A transmission component, disposed between the housing and the base, transmits the force acting on the base to the housing. The base and the connector are connected by a pin inserted into an elongated hole on one side and a round hole on the other side, with a first gap extending in the direction of exhaust gas flow formed between the pin and the elongated hole.

2. The support mechanism of the waste heat recovery boiler according to claim 1, characterized in that, The plurality of limiting members are clamped into the manifold through a second gap, wherein the first gap is set to be larger than the second gap.

3. A support mechanism for a waste heat recovery boiler, suitable for a waste heat recovery boiler, the waste heat recovery boiler comprising: a shell structure, through which waste gas flows horizontally; a heat transfer tube assembly suspended inside the shell; an upper manifold connected to the upper end of the heat transfer tube assembly and extending in a horizontal direction orthogonal to the flow of waste gas; and a lower manifold connected to the lower end of the heat transfer tube assembly and extending in a horizontal direction orthogonal to the flow of waste gas, the support mechanism of the waste heat recovery boiler suppressing the swaying of the heat transfer tube assembly, characterized in that... The support mechanism of the waste heat recovery boiler includes: an upper support mechanism to suppress the swaying of the upper end of the heat transfer tube assembly; and a lower support mechanism to suppress the swaying of the lower end of the heat transfer tube assembly. The upper support mechanism includes: an upper base for maintaining the position of the upper manifold in the gas flow direction; an upper connector welded to the upper manifold and combined with the upper base; multiple upper limiting members disposed on the upper base to clamp the upper manifold; and a connecting accessory disposed on the top portion of the housing and connected to the upper base. The lower support mechanism includes: a lower base for maintaining the position of the lower manifold in the gas flow direction; a lower connector welded to the lower manifold and combined with the lower base; a plurality of lower limiting members disposed on the lower base to clamp the lower manifold; and a support column disposed on the bottom part of the housing to support the horizontal force acting on the lower base. The upper base and the upper connector are connected by an upper pin inserted into an upper elongated hole on one side and an upper circular hole on the other side. A first gap extending along the flow direction of the exhaust gas is formed between the upper pin and the upper elongated hole. The lower base and the lower connector are connected by a lower pin inserted into a lower elongated hole on one side and a lower circular hole on the other side, and a third gap extending along the flow direction of the exhaust gas is formed between the lower pin and the lower elongated hole.

4. The support mechanism of the waste heat recovery boiler according to claim 3, characterized in that, The plurality of upper limiting members are clamped into the upper manifold through a second gap, wherein the first gap is set to be larger than the second gap. The plurality of lower limiting members are clamped into the lower manifold through a fourth gap, and the third gap is set to be larger than the fourth gap.

5. The support mechanism for the waste heat recovery boiler according to claim 3 or 4, characterized in that, A fifth gap extending in the vertical direction is formed between the lower pin and the lower long hole.

6. The support mechanism for the waste heat recovery boiler according to claim 3 or 4, characterized in that, The lower base engages with the support column in a manner that allows it to slide vertically. A rib is provided on the upper surface of the support column to prevent the lower base from tilting.

Images