JP7089913B2 - Heat exchanger - Google Patents

Description

The present invention relates to a vertical heat exchange device used for waste heat recovery and the like.

Conventionally, there is a vertical heat exchange device (hereinafter, also simply referred to as “heat exchange device”) that utilizes waste heat such as exhaust gas from a gas turbine. As a heat exchange device, for example, there is a waste heat recovery boiler of a gas turbine. In such a heat exchange device, for example, at the inlet of the heat exchange device, exhaust gas having a temperature of about 600 ° C. is recovered by heat in the heat exchange device and released to the atmosphere as exhaust gas of about 100 ° C.

FIG. 9 is a vertical sectional view showing a heat transfer portion support structure 120 in a conventional vertical heat exchange device. The casing 111 of the heat exchange device is maintained at a predetermined strength by the frame material 112 of the strength member provided on the outside. Since the high-temperature exhaust gas G passes through the casing 111, the heat insulating material 140 is installed on the inner surface side of the casing 111. As a result, the outer surface of the casing 111 is close to the outside air temperature.

On the other hand, the receiving beam 117 that supports the heat transfer portion 150 inside the casing 111 is supported by the support base 122 provided at the position of the frame member 112. Since the central portion of the receiving beam 117 comes into direct contact with the high-temperature exhaust gas passing through the inside of the casing 111, the temperature becomes extremely high. However, both ends supported by the support 122 of the receiving beam 117 are close to the outside air temperature. Therefore, in the conventional idea, the receiving beam 117 is supported by a structure that does not transmit the stress due to thermal elongation to the frame material 112.

In this structure, one end (right end in the figure) of the joint between the receiving beam 117 and the support base 122 is fixed, and the other (left end in the figure) is not fixed, and the end of the receiving beam 117 is fixed on the support base 122. There is a slide structure 160 that slides on the top surface. The right end of the receiving beam 117 is fixed to the support base 122 with bolts. The slide structure 160 at the left end of the receiving beam 117 is provided with a guide wall 161 so as to guide both side surfaces of the receiving beam 117 from the support base 122, and the end portion of the supporting base 122 is provided even if thermal elongation occurs in the receiving beam 117. It is absorbed by sliding along the guide wall 161 on the upper surface. Therefore, the slide structure 160 absorbs the difference in thermal elongation between the two, and the thermal stress is not transmitted to the frame material 112 via the support base 122.

As a prior art of this kind, as a brace structure in the duct in the boiler equipment, a connecting material for connecting the brace divided into two is fixed to one brace with a pin, and to the other brace. There is a slide mechanism attached with a pin to an elongated hole extending in the axial direction (see, for example, Patent Document 1). In this brace structure, the compressive force generated in the brace due to thermal elongation is relaxed by sliding the pin along the slotted hole.

Japanese Unexamined Patent Publication No. 11-218324

By the way, as described above, in the heat transfer portion support structure 120, if the joint portion between the receiving beam 117 and the support base 122 is a slide structure 160, the stress due to thermal elongation is not transmitted from the joint portion to the support base 122. Therefore, as shown in the bending moment diagram of the horizontal cross section shown in FIG. 10A, in the heat transfer portion support structure 120, the bending moment due to thermal elongation does not act on the casing 111 and the frame material 112.

On the other hand, the internal pressure of the exhaust gas G flowing inside acts on the casing 111 and the frame material 112 in addition to the stress due to thermal elongation. In the heat transfer portion support structure 120, since the intermediate receiving beam 117 has a sliding structure, the long side direction of the frame member 112 of the casing 111 receives a large moment of internal pressure as a full-length beam. For example, in the case of a long-span frame material 112, a large bending moment that pushes outward due to internal pressure acts. Therefore, as shown in the bending moment diagram of FIG. 10B, in the heat transfer portion support structure 120, a large bending moment due to the internal pressure acts on the casing 111 and the frame material 112. In the case of this example, the maximum bending moment M1 acts on the portion in the long side direction of the casing 111.

Therefore, the conventional heat exchange device has a structure using a large frame material 112 so that the strength of the frame material 112 in the casing 111 can be maintained even if a large bending moment M1 due to the internal pressure acts. For this large frame material 112, for example, a built-up channel material or the like is used. In the example shown in FIG. 9 corresponding to the bending moment diagram shown in FIG. 10, the frame material 112 extending in the lateral direction is large, and is twice as large as the frame material 112 extending in the vertical direction. However, when the structure using the large frame material 112 is adopted, the steel frame weight and the welding amount of the frame material 112 in the casing 111 increase. Therefore, a great deal of labor and cost are required to manufacture the heat exchanger due to the increase in the weight of the material and the increase in the amount of work.

Therefore, the present inventor has diligently studied the heat transfer portion support structure of the heat exchanger from both thermodynamics and structural mechanics in response to the above problems. Focusing on the fact that the bending moment due to the amount of heat elongation of the receiving beam is smaller than the bending moment acting on the frame due to the amount of deformation due to the internal pressure of the exhaust gas, the conventional idea was changed and the joint between the receiving beam and the frame material was changed. We verified that the heat elongation is supported by the frame material as a pin support structure from the slide structure, and invented a heat exchange device having a heat transfer part support structure different from the conventional one.

The heat transfer device according to the present invention is arranged inside the casing, a casing having a rectangular cross section in a plan view, a frame material provided on the outer surface of the casing to maintain the strength of the casing, and the casing. The heat transfer portion, a plurality of receiving beams provided in a direction orthogonal to the heat transfer portion so as to support the heat transfer portion from below, and the frame material projecting inward of the casing from the position of the frame material. A support portion for supporting the end portion of the receiving beam is provided, and the end portion of the receiving beam and the supporting portion are fixed by a fixing portion that supports the receiving beam in a state of restraining the axial movement of the receiving beam. The inner surface of the casing, the support portion, and the fixing portion are insulated with a heat insulating material. The "fixed portion" in this specification and the documents of the scope of claims includes those that restrain the axial movement of the receiving beam while supporting the receiving beam from below.

With this configuration, the receiving beam that supports the heat transfer portion is fixed to the support portion that projects inward from the position of the frame material by the fixing portion. Since the receiving beam is supported in a state where the axial movement is restrained by the fixed portion, the axial displacement due to thermal elongation is transmitted from the support portion to the frame material and is supported by the frame material. That is, as a result of structurally examining the casing in which the exhaust gas flows in the vertical direction, the deformation of the frame material due to the internal pressure of the exhaust gas is caused by fixing the heat elongation of the receiving beam so as to be received by the frame material via the support portion. It is restrained by the receiving beam. As a result, we have invented a heat transfer section support structure that can significantly reduce the bending moment acting on the frame material even if the bending moment due to internal pressure is added to the bending moment due to thermal elongation deformation of the receiving beam. As a result, the heat transfer part support structure is downsized, the weight of the frame material in the casing and the amount of welding are reduced, the weight of the material is reduced and the amount of work is reduced, and the labor and cost for installing the heat exchange device are reduced. Can be reduced.

Further, the support portion has a support member protruding inward from the position of the frame material, and the fixing portion has an end portion of the receiving beam fixed to the support member by a fixing pin. It is also good. "Fixing pin" in this specification and the documents of claims includes fastening elements such as fixing bolts and fixing pins.

With this configuration, since the fixed portion of the receiving beam and the supporting member of the supporting portion are connected by the fixing pin, the heat expansion of the receiving beam can be directly received by the frame material via the supporting portion.

Further, the heat insulating material may be sandwiched between the support member and the end portion of the receiving beam.

With such a configuration, it is possible to further suppress heat transfer from the fixed portion of the receiving beam to the support member on the frame material side by the heat insulating material.

Further, the support portion has a receiving portion protruding inward from the position of the frame material and an engaging portion protruding upward from the receiving portion, and the fixing portion is the receiving beam. It has a mounting portion to be mounted on the receiving portion and a locking portion that engages with the engaging portion and restrains the axial movement of the receiving beam, which is provided at the end of the receiving portion. The space between the portion and the above-mentioned resting portion and the space between the engaging portion and the locking portion may be insulated by a heat insulating material.

With this configuration, the mounting portion of the receiving beam is provided on the supporting portion in a state where the locking portion provided at the end of the receiving beam is engaged with the engaging portion provided on the supporting portion. By placing it on the receiving portion, the axial movement due to the thermal elongation of the receiving beam can be restrained by the supporting portion. Heat transfer from the end of the receiving beam to the supporting portion can be suppressed by a heat insulating material provided between the receiving portion and the mounting portion and between the engaging portion and the locking portion.

Further, the receiving beam has a vertical plate supported by the supporting portion and a horizontal plate orthogonal to the vertical plate, and the horizontal plate is placed inside the heat insulating material by a predetermined distance at the end of the receiving beam. A relief portion may be provided so as to be located at.

With this configuration, even if there is a difference between the amount of heat elongation generated in the receiving beam and the amount of heat deformation generated in the heat insulating material, the receiving beam can prevent the receiving beam from pressing the inner surface of the heat insulating material.

Further, the casing may be composed of a plurality of divided modules in the vertical direction, and the plurality of divided modules may have a first connecting portion for connecting the upper portion and the lower portion of the divided modules in the vertical direction.

With this configuration, a support portion provided so as to project inward from the position of the frame material, and a heat insulating material provided so as to include the end portion of the receiving beam fixed to the support portion by the fixed portion. Can be easily processed accurately at the time of manufacturing each divided module. If each split module is transported to the installation location and stacked in the vertical direction, and the upper split module and the lower split module are connected by the first connecting portion, a heat exchange device extending in the vertical direction can be easily installed. can. Therefore, the time and labor required for manufacturing and installing the vertical heat exchanger can be significantly reduced.

According to the present invention, the heat transfer portion support structure of the heat exchange device is miniaturized, the weight of the steel frame and the welding amount of the casing and the heat transfer portion support structure are reduced, the weight reduction of the material and the work amount are reduced, and the heat exchange is performed. It is possible to reduce the labor and cost for installing the device.

FIG. 1 is an overall front view of a heat exchange device according to an embodiment of the present invention. FIG. 2 is an enlarged front view showing a part of the divided modules in the heat exchange device shown in FIG. 1. FIG. 3 is an enlarged front view showing a split module of an example different from that of FIG. FIG. 4 is an enlarged cross-sectional view of the first heat transfer portion support structure according to the first embodiment shown in the IV-IV cross-sectional views shown in FIGS. 2 and 3. FIG. 5 is a plan view of the first heat transfer portion support structure shown in FIG. FIG. 6 is an enlarged cross-sectional view showing a second heat transfer portion support structure according to the second embodiment of the cross-sectional view shown in FIG. FIG. 7 is a plan view of the second heat transfer portion support structure shown in FIG. 8 is a drawing showing the bending moment of the horizontal cross section in the first heat transfer portion support structure shown in FIG. 4 and the second heat transfer portion support structure shown in FIG. 6, and FIG. 8A is a bending moment diagram generated by thermal elongation. , (B) is a bending moment diagram generated by the internal pressure. FIG. 9 is a cross-sectional view showing a heat transfer portion support structure in a conventional heat exchange device. 10A and 10B are drawings showing bending moments in a horizontal cross section in the heat transfer portion support structure shown in FIG. 9, where FIG. 10A is a bending moment diagram generated by thermal elongation, and FIG. 10B is a bending moment diagram generated by internal pressure.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiment, the vertical heat exchange device 1 for heat exchange of the exhaust gas G from the gas turbine will be described as an example. The concept of the vertical and horizontal directions in this specification and the documents of the claims shall be consistent with the concept of the vertical and horizontal directions in the state facing the vertical heat exchange device 1 shown in FIG.

(Overall configuration of heat exchanger)
FIG. 1 is an overall front view of the vertical heat exchange device 1 according to the embodiment. In the vertical heat exchanger 1 of this embodiment, the gas inlet portion 2 of the exhaust gas G is provided on the lower right side. The high-temperature exhaust gas G entering from the gas inlet portion 2 flows from the lower side to the upper side of the heat exchange device 1. The exhaust gas G heat recovered by the heat exchange device 1 is discharged to the atmosphere from the upper gas outlet portion 3.

The heat exchange device 1 of this embodiment is provided with a plurality of division modules 10 in the vertical direction. Each division module 10 is formed in a rectangular shape having a rectangular cross section in a plan view, is open in the vertical direction, and is surrounded by a casing 11 around a side surface. The casing 11 is made of a plate material, and the strength is ensured by the frame material 12 provided on the outer surface thereof.

The split module 10 is provided with a plurality of heat transfer tubes 50 (horizontal serpentine tubes 55) (FIGS. 2 to 4 and 6), which are heat transfer portions, inside the split module 10. When the high-temperature exhaust gas G passes through the inside of the casing 11, heat is exchanged with water or steam flowing inside the heat transfer tube 50 (horizontal serpentine tube 55). The water or steam flowing inside the heat transfer tube 50 (horizontal serpentine tube 55) is discharged as hot water or a mixture of saturated water and saturated steam or superheated steam by heat exchange. Saturated steam and superheated steam are, for example, sent to a steam turbine or used as a heating source.

(Structure of heat exchange unit)
FIG. 2 is an enlarged front view showing one division module 10 in the heat exchange device 1 shown in FIG. 1. FIG. 3 is an enlarged front view showing a division module 10 of an example different from that of FIG. FIG. 3 is an example in which the heat transfer tube 50 is composed of the horizontal serpentine tube 55, and since the configurations other than the horizontal serpentine tube 55 are the same as those in FIG. 2, the same configurations are designated by the same reference numerals and have a common description. ..

The strength of the split module 10 is ensured by providing the frame material 12 on the outer surface of the casing 11. The frame material 12 has a vertical frame material 13 extending in the vertical direction, a horizontal frame material 14 extending in the horizontal direction, and a corner frame material 15 (for example, an H-shaped steel material) provided at the corners of the casing 11. There is. In this example, four vertical frame members 13 are provided at predetermined intervals in the long side direction (left-right direction in the figure) of the rectangular casing 11.

Inside each division module 10, a heat transfer tube 50 (horizontal serpentine tube 55) is arranged in the lateral direction. In this example, since the split module 10 has a rectangular casing 11 having a long horizontal dimension, a plurality of long heat transfer tubes 50 (horizontal serpentine tubes 55) extending laterally from the left end to the right end of the figure are provided. .. The heat transfer tube 50 (horizontal serpentine tube 55) shown in the figure shows a part thereof, and a predetermined number of heat transfer tubes 50 (horizontal serpentine tube 55) are provided inside each division module 10. The heat transfer tube 50 of FIG. 2 is provided diagonally from the lower left to the upper right. The horizontal serpentine tube 55 in FIG. 3 is provided horizontally.

The heat transfer tube 50 (horizontal serpentine tube 55) is supported by a receiving beam 17 provided inside the casing 11 at the position of the vertical frame member 13. The receiving beam 17 is provided in a direction orthogonal to the heat transfer tube 50 (horizontal serpentine tube 55). In this example, the receiving beams 17 are provided at the positions of the four vertical frame members 13 provided at predetermined intervals in the long side direction of the casing 11, so that the heat transfer tube 50 (horizontal serpentine tube 55) is formed of these four. It is supported by the receiving beam 17. The position of the receiving beam 17 shown in the front view is the same as the position of the support members 22 and 32 described later.

Further, the heat exchange device 1 has a structure in which a plurality of division modules 10 are combined in the vertical direction (FIG. 1). Therefore, the division module 10 has a first connection portion 16 that connects the division modules 10 arranged at the upper part and the lower part in the vertical direction. The first connecting portion 16 may be configured to connect the upper portion and the lower portion of the split module 10. In this embodiment, the horizontal frame material 14 also serves as the first connecting portion 16. The horizontal frame material 14 is provided with bolt holes (vertical lines (shown)) that penetrate in the vertical direction so that the split modules 10 can be connected by bolts in a stacked state. In the figure, the bolt holes are designated by the reference numerals of the first connecting portion 16. The upper and lower horizontal frame members 14 may be connected by welding. Further, in this embodiment, the heat transfer tube 50 (horizontal serpentine tube 55) provided inside the casing 11 is a second connecting portion for connecting the heat transfer tube 50 (horizontal serpentine tube 55) of the split module 10 arranged at the upper part and the lower part. Has 51. The second connecting portion 51 may be configured as long as it can connect the end portions of the heat transfer tube 50 (horizontal serpentine tube 55), and a pipe connecting member can be used (not shown). The heat transfer tube 50 (horizontal serpentine tube 55) may be configured not to be connected by the vertically arranged split modules 10.

If the heat exchange device 1 is composed of a plurality of division modules 10, each division module 10 can be efficiently manufactured in a factory or the like. Then, each of the split modules 10 is transported to the installation location and arranged in a vertical stack, and the upper end of the heat transfer tube 50 (horizontal serpentine tube 55) of the lower split module 10 and the heat transfer tube 50 of the upper split module 10 ( The lower end of the horizontal serpentine tube 55) is connected by the second connecting portion 51. Further, the lower division module 10 and the upper division module 10 are connected by the first connecting portion 16. As a result, the heat exchange device 1 extending in the vertical direction can be easily installed. Therefore, by configuring the vertical heat exchange device 1 with the split module 10, the time and labor required for manufacturing and installing the vertical heat exchange device 1 can be significantly reduced.

(Heat transfer part support structure according to the first embodiment)
FIG. 4 is an enlarged cross-sectional view of the first heat transfer portion support structure 20 according to the first embodiment shown in the IV-IV cross-sectional views shown in FIGS. 2 and 3. FIG. 5 is a plan view of the first heat transfer portion support structure 20 shown in FIG. Since the structures that support both ends of the receiving beam 17 are the same, only one of them will be illustrated and described in the following description.

As shown in FIG. 4, the first heat transfer portion support structure 20 receives by fixing the fixing portion 21 provided at the end of the receiving beam 17 to the supporting member 22 which is the supporting portion with the fixing bolt 23. The axial movement of the beam 17 (left-right movement in the figure) is restricted. A heat transfer tube 50 (horizontal serpentine tube 55) is supported on the upper part of the receiving beam 17.

The support member 22 is provided at a position where the vertical frame member 13 of the casing 11 is provided. The support member 22 is provided so as to project inward from the vertical frame member 13 toward the inside of the casing 11. The support member 22 has a vertical plate 22a and horizontal plates 22b provided at positions above and below the vertical plate 22a. For the support member 22, for example, H-shaped steel can be used. The vertical plate 22a is provided with bolt holes 24 (FIG. 5) at predetermined intervals in the vertical direction.

On the other hand, the receiving beam 17 has a vertical plate 17a and horizontal plates 17b provided above and below the vertical plate 17a. For the receiving beam 17, for example, H-shaped steel can be used. The fixing portion 21 at the end of the receiving beam 17 has an end vertical plate 21a and an auxiliary horizontal plate 21b provided on the upper part and the lower part of one side of the end vertical plate 21a. The end vertical plate 21a extends from the vertical plate 17a in the intermediate portion of the receiving beam 17. The end vertical plate 21a can be formed, for example, by removing the upper and lower horizontal plates 17b of the H-shaped steel. The end vertical plate 21a is provided with bolt holes 25 (FIG. 5) having the same diameter as the bolt holes 24 provided in the vertical plate 22a of the support member 22 at the same intervals. The auxiliary horizontal plate 21b is provided to maintain the strength of the end vertical plate 21a in the lateral direction. The auxiliary horizontal plate 21b is provided from the end of the end vertical plate 21a to a position beyond the end of the horizontal plate 17b in the intermediate portion of the receiving beam 17.

Further, a relief portion 27 is provided between the end vertical plate 21a and the horizontal plate 17b of the receiving beam 17. The relief portion 27 is provided up to a position where the horizontal plate 17b is inside a predetermined distance from the heat insulating material 40 provided on the inner surface of the casing 11. By providing the relief portion 27, even if there is a difference between the amount of heat elongation generated in the receiving beam 17 and the amount of heat deformation generated in the heat insulating material 40, the receiving beam 17 does not press the inner surface of the heat insulating material 40. There is. As the heat insulating material 40, for example, a plate-shaped material using ceramic fiber and rock wool can be used.

As shown in FIG. 5, according to the first heat transfer portion support structure 20, a state in which the heat insulating material 41 is sandwiched between the vertical plate 22a of the support member 22 and the contact surface of the end vertical plate 21a of the receiving beam 17. Then, the vertical plate 22a and the end vertical plate 21a are aligned. Then, the fixing bolt 23 is inserted into the bolt hole 24 provided in the vertical plate 22a of the support member 22 and the bolt hole 25 provided in the end vertical plate 21a of the fixing portion 21, and the vertical plate 22a and the nut 26 come into contact with each other. The heat insulating material 41 is inserted between the surface and the surface and fixed with the nut 26. In this example, the support member 22 and the fixing portion 21 are fixed by the fixing bolt 23 and the nut 26, but they may be connected by a fixing pin (not shown). With such a structure, the axial movement of the receiving beam 17 is restrained.

The support member 22 and the fixing portion 21 of the receiving beam 17 are covered with the heat insulating material 40. As the heat insulating material 40, for example, a material having a metal plate on the inner side surface can be used. In this case, the heat insulating material 40 can attach the metal plate portion to the casing 11 with bolts (two-dot chain line in the figure). The heat insulating material 40 is provided by processing the support member 22 and the portion of the fixing portion 21 of the receiving beam 17 so as to cover them. In the case of this example, the inner surface of the heat insulating material 40 has a slit-shaped opening only in the portion through which the end vertical plate 21a and the auxiliary horizontal plate 21b of the fixing portion 21 are inserted. By using the heat exchange device 1 as a plurality of divided modules 10 (FIGS. 2 and 3), the heat insulating material 40 can be appropriately processed and installed in a factory or the like.

According to the heat exchange device 1 provided with the first heat transfer portion support structure 20, the heat elongation generated in the receiving beam 17 in contact with the high-temperature exhaust gas G is supported inside the vertical frame material 13. It is supported by the vertical frame member 13 via the fixing portion 21 fixed to the member 22. Further, the internal pressure of the exhaust gas G inside the casing 11 is also supported by the casing 11 and the frame material 12 because the fixing portion 21 of the receiving beam 17 is fixed to the support member 22.

Further, the fixing portion 21 and the supporting member 22 at the end of the receiving beam 17 are covered with a heat insulating material 40 provided on the inner surface of the casing 11. Therefore, the fixing portion 21 and the support member 22 of the receiving beam 17 do not come into contact with the high-temperature exhaust gas G, and the temperature of the internal exhaust gas G can be suppressed from being thermally conducted to the casing 11. Moreover, since the heat insulating material 41 is sandwiched between the fixing portion 21 of the receiving beam 17 and the supporting member 22, the amount of heat conduction in which the heat of the receiving beam 17 is transferred to the supporting member 22 from this portion can be suppressed.

According to the vertical heat exchange device 1 provided with the first heat transfer portion support structure 20, as shown in FIG. 8 described later, the overall bending moment supported by the casing 11 and the frame material 12 is significantly increased. It can be made smaller.

Therefore, among the frame materials 12 that maintain the strength of the casing 11 of the heat exchange device 1, the horizontal frame material 14 is particularly miniaturized (the conventional large horizontal frame material 112 shown in FIG. 9 is replaced with the small horizontal frame material shown in FIG. 4). The weight of the steel frame and the amount of welding of the frame material 12 can be reduced. By reducing the weight of the steel frame material and reducing the amount of work, it is possible to reduce the labor and cost for installing the heat exchange device 1. For example, it is possible to reduce the weight of the steel frame material by about 40%. Further, the outer surface of the casing 11 may be painted at room temperature, and the cost can be reduced in this respect as well.

(Heat transfer tube support structure according to the second embodiment)
FIG. 6 is an enlarged cross-sectional view showing the second heat transfer portion support structure 30 according to the second embodiment in the cross section shown in FIG. FIG. 7 is a plan view of the second heat transfer portion support structure 30 shown in FIG. The second heat transfer portion support structure 30 restrains the axial movement of the receiving beam 17 by locking the fixing portion 31 provided at the end of the receiving beam 17 to the supporting member 32 which is the supporting portion. There is. A heat transfer tube 50 (horizontal serpentine tube 55) is supported on the upper part of the receiving beam 17.

As shown in FIG. 6, a support member 32, which is a support portion, is provided at a position where the vertical frame member 13 of the casing 11 is provided. The support member 32 has a receiving portion 32a provided so as to project inward from the position of the vertical frame member 13 toward the inside of the casing 11. The receiving portion 32a is provided with an engaging portion 32b at a position at a predetermined distance inward from the inner surface of the casing 11. The engaging portion 32b is two L-shaped members protruding upward from the receiving portion 32a, and is provided so that the L-shapes are opposite to each other in a plan view. The engaging portion 32b can be welded or bolted to the receiving portion 32a.

On the other hand, the receiving beam 17 has a vertical plate 17a and horizontal plates 17b provided above and below the vertical plate 17a. For the receiving beam 17, for example, H-shaped steel can be used. The fixing portion 31 provided at the end of the receiving beam 17 is a locking portion that engages with the mounting portion 31a mounted on the receiving portion 32a and the engaging portion 32b to restrain the axial movement of the receiving beam 17. It has 31b. The mounting portion 31a is provided in the direction in which the vertical plate 17a of the receiving beam 17 extends. The locking portion 31b is provided so as to be orthogonal to each other at the tip portion of the mounting portion 31a. The mounting portion 31a and the locking portion 31b form a T-shape in a plan view. The mounting portion 31a can be formed, for example, by removing the upper and lower horizontal plates 17b at the end of the receiving beam 17. Then, by fixing the locking portion 31b to the tip end portion of the mounting portion 31a by welding or the like, the fixing portion 31 having a T-shaped plan view can be formed.

Further, a relief portion 37 is provided between the mounting portion 31a and the horizontal plate 17b of the receiving beam 17. The relief portion 37 is provided up to a position where the horizontal plate 17b is inside a predetermined distance from the heat insulating material 40 provided on the inner surface of the casing 11. By providing the relief portion 37, even if there is a difference between the amount of heat elongation generated in the receiving beam 17 and the amount of heat deformation generated in the heat insulating material 40, the receiving beam 17 does not press the inner surface of the heat insulating material 40. There is. As the heat insulating material 40, for example, a plate-shaped material using ceramic fiber and rock wool can be used.

Then, according to the second heat transfer portion support structure 30, the first heat insulating material 33 is provided on the upper surface of the receiving portion 32a of the support member 32. After that, as shown in FIG. 7, the fixing portion 31 of the receiving beam 17 is dropped from above on the upper surface of the first heat insulating material 33. After that, the second heat insulating material 34 is provided between the inner surface of the casing 11 and the locking portion 31b, and the third heat insulating material 35 is provided between the engaging portion 32b and the locking portion 31b and the mounting portion 31a. .. The second heat insulating material 34 is provided in a state where there is almost no gap between the inner surface of the casing 11 and the locking portion 31b. The third heat insulating material 35 is provided in a state where there is almost no gap between the engaging portion 32b, the locking portion 31b, and the mounting portion 31a. After the first heat insulating material 33, the second heat insulating material 34, and the third heat insulating material 35 are provided on the upper surface of the receiving portion 32a, the fixing portion 31 formed in the T shape of the receiving beam 17 may be fitted from above. good. As described above, the second heat transfer portion support structure 30 is a drop-in method in which the fixing portion 31 provided at the end of the receiving beam 17 is dropped from above the support member 32. With such a structure, the axial movement of the receiving beam 17 is restrained.

The support member 32 and the fixing portion 31 of the receiving beam 17 are covered with the heat insulating material 40. As the heat insulating material 40, for example, a material having a metal plate on the inner side surface can be used. In this case, the heat insulating material 40 can attach the metal plate portion to the casing 11 with bolts (two-dot chain line in the figure). The heat insulating material 40 is provided by processing the support member 32 and the receiving beam 17 so as to cover them. In the case of this example, the inner surface of the heat insulating material 40 has an opening having a cross-sectional shape of the receiving beam 17. By using the heat exchange device 1 as a plurality of divided modules 10 (FIGS. 2 and 3), the heat insulating material 40 can be appropriately processed and installed in a factory or the like.

According to the heat exchange device 1 provided with the second heat transfer portion support structure 30, the heat elongation generated in the receiving beam 17 in contact with the high-temperature exhaust gas G is supported inside the vertical frame material 13. It is supported by the vertical frame material 13 via the fixing portion 31 supported by the member 32 via the heat insulating materials 33 to 35. Further, the internal pressure of the exhaust gas G inside the casing 11 is such that the fixing portion 31 of the receiving beam 17 is fixed to the support member 32 provided inside the vertical frame material 13 via the heat insulating materials 33 to 35. It is supported by the vertical frame material 13.

Further, the fixing portion 31 and the supporting member 32 at the end of the receiving beam 17 are covered with a heat insulating material 40 provided on the inner surface of the casing 11. Therefore, the fixing portion 31 and the support member 32 of the receiving beam 17 do not come into contact with the high-temperature exhaust gas G, and the temperature of the internal exhaust gas G can be suppressed from being thermally conducted to the casing 11.

Moreover, heat insulating materials 33 to 35 are provided on the contact surface between the support member 32 and the fixing portion 31 of the receiving beam 17 to restrain the axial movement of the receiving beam 17. Therefore, there is no fastening member such as a bolt between the fixing portion 31 of the receiving beam 17 and the supporting member 32, and the metal surfaces are not in contact with each other. As a result, the thermal conductivity from the receiving beam 17 in contact with the high-temperature exhaust gas G to the support member 32 on the outside air temperature side via the fixed portion 31 can be reduced.

According to the vertical heat exchange device 1 provided with the second heat transfer portion support structure 30, the vertical heat exchange device 1 provided with the first heat transfer portion support structure 20 is shown in FIG. 8 to be described later. As shown, the overall bending moment supported by the casing 11 and the frame material 12 can be significantly reduced.

Therefore, among the frame materials 12 that maintain the strength of the casing 11 of the heat exchange device 1, the horizontal frame material 14 is particularly miniaturized (the conventional large horizontal frame material 112 shown in FIG. 9 is replaced with the small horizontal frame material shown in FIG. 6). The weight of the steel frame and the amount of welding of the frame material 12 can be reduced. By reducing the weight of the steel frame material and reducing the amount of work, it is possible to reduce the labor and cost for installing the heat exchange device 1. For example, it is possible to reduce the weight of the steel frame material by about 40%. Further, the outer surface of the casing 11 may be painted at room temperature, and the cost can be reduced in this respect as well.

(Stress diagram of bending moment)
FIG. 8 shows the bending of the horizontal cross section (cross section of arrow VIII-VIII shown in FIGS. 2 and 3) in the first heat transfer section support structure 20 shown in FIG. 4 and the second heat transfer section support structure 30 shown in FIG. It is a drawing which shows the moment, (A) is a bending moment diagram generated by thermal elongation, (B) is a bending moment diagram generated by internal pressure.

As shown in FIG. 8A, the bending moment due to thermal elongation acting on the frame material 12 is overall in the long side direction of the frame material 12 in the casing 11 because the receiving beam 17 is fixed to the support member 22. Receives a bending moment. This bending moment varies depending on the distance between the receiving beams 17, but the bending moment is received by the amount of thermal elongation of about ten and several mm. However, the angle at which the frame material 12 is deformed by the bending moment due to the amount of thermal elongation is relatively small.

As shown in FIG. 8B, the bending moment of the internal pressure acting on the frame material 12 is such that the receiving beam 17 is fixed to the support member 22, so that the long side direction of the frame material 12 in the casing 11 is each receiving beam. It is supported by a pitch of 17. Therefore, the bending moment acted by the internal pressure is a moment with a short pitch with the connection portion of the receiving beam 17 with the frame member 12 as a fulcrum. In the case of this example, the maximum bending moment M2 acts on the connection portion of the frame material 12 with the receiving beam 17 in the casing 11. However, the maximum bending moment M2 shown in FIG. 8B is smaller than the conventional bending moment M1 shown in FIG. 10B described above, and can be reduced to about 10%.

Therefore, according to the heat exchange device 1, even if the bending moment due to the amount of heat elongation and the bending moment due to the internal pressure act on the frame material 12, the overall bending moment supported by the casing 11 and the frame material 12 is significantly increased. Can be made smaller.

(Summary)
As described above, according to the vertical heat exchange device 1, the weight of the frame material 12 can be significantly reduced. Moreover, the structure of the joint portion between the receiving beam 17 and the vertical frame member 13 is simplified. Therefore, it is possible to significantly reduce the manufacturing cost and the installation cost required for manufacturing the vertical heat exchange device 1.

Further, if the vertical heat exchange device 1 is composed of a plurality of division modules 10, the support members 22 and 32 provided so as to project inward from the position of the vertical frame member 13 and fixed to the support members 22 and 32. The structure of the heat insulating material 40 or the like provided so as to include the end portion of the receiving beam 17 fixed by the portions 21 and 31 can be efficiently processed and attached in a factory or the like. Therefore, it is possible to reduce the labor and time required for manufacturing and installing the vertical heat exchange device 1.

(Other variants)
The heat exchange device 1 can be applied as long as it is a vertical type, and the form in a plan view is not limited to the horizontally long form of the above-described embodiment. Further, the pitch of the receiving beam 17 is not limited. Further, the heat exchange device 1 is not limited to the one composed of a plurality of division modules 10.

The above-described embodiment is an example, and the present invention can be carried out as long as it is the vertical heat exchange device 1, and various configurations may be changed as long as the gist of the present invention is not impaired. It is not limited to the above-described embodiment.

1 Vertical heat exchanger
2 Gas inlet
3 Gas outlet 10 Divided module 11 Casing 12 Frame material 13 Vertical frame material 14 Horizontal frame material 15 Square frame material 16 1st connecting part 17 Receiving beam 17a Vertical plate 17b Horizontal plate 20 1st heat transfer part Support structure 21 Fixed part 21a End vertical plate 21b Auxiliary horizontal plate 22 Support member 22a Vertical plate 22b Horizontal plate 23 Fixing bolt 24,25 Bolt hole 26 Nut 27 Relief part 30 Second heat transfer part Support structure 31 Fixing part 31a Mounting part 31b Locking part 32 Support member 32a Receiving part 32b Engaging part 33 First heat insulating material 34 Second heat insulating material 35 Third heat insulating material 37 Relief part 40, 41 Heat transfer material 50 Heat transfer tube (heat transfer part)
51 Second connecting part 55 Horizontal serpentine tube (heat transfer part)
G exhaust gas

Claims (6)

A casing with a rectangular cross section in plan view,
A frame material provided on the outer surface of the casing, which maintains the strength of the casing,
A heat transfer unit arranged inside the casing,
A plurality of receiving beams provided in a direction orthogonal to the heat transfer portion so as to support the heat transfer portion from below,
A support portion that protrudes inward from the position of the frame material and supports the end portion of the receiving beam is provided.
The end portion of the receiving beam and the supporting portion are fixed by a fixing portion that supports the receiving beam in a state of restraining the axial movement of the receiving beam.
A heat exchange device characterized in that a heat insulating material is provided inside the casing so as to cover the support portion and the fixing portion. The support portion has a support member that projects inward from the position of the frame material to the inside of the casing.
In the fixing portion, the end portion of the receiving beam is fixed to the support member with a fixing pin.
The heat exchange device according to claim 1. A heat insulating material is sandwiched between the support member and the end of the receiving beam.
The heat exchange device according to claim 2. The support portion has a receiving portion that protrudes inward from the position of the frame material to the inside of the casing, and an engaging portion that protrudes upward from the receiving portion.
The fixing portion includes a mounting portion provided at the end of the receiving beam and a locking portion that engages with the engaging portion and restrains the axial movement of the receiving beam. And have
The space between the receiving portion and the above-mentioned placing portion and the space between the engaging portion and the locking portion are insulated by a heat insulating material.
The heat exchange device according to claim 1. The receiving beam has a vertical plate supported by the support portion and a horizontal plate orthogonal to the vertical plate.
At the end of the receiving beam, a relief portion for locating the horizontal plate within a predetermined distance from the heat insulating material is provided.
The heat exchange device according to any one of claims 1 to 4. The casing is composed of a plurality of division modules in the vertical direction.
The plurality of divided modules have a first connecting portion that connects the upper part and the lower part of the divided module in the vertical direction.
The heat exchange device according to any one of claims 1 to 5.

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