Heat exchange tube and heat exchanger

Abstract

The application discloses a heat exchange tube and a heat exchanger with the same. In the heat exchange tube, at least one side baffle comprises a partition structure extending in a first direction, the partition structure has an abutting surface abutting against and connected with a panel, and the heat exchange tube further comprises at least two different sealing materials applied on the same abutting surface, thereby forming at least two sealing areas arranged at different positions in a second direction parallel to the panel and perpendicular to the first direction. The heat exchange tube according to the embodiment of the application can combine sealing materials with different characteristics to realize the bonding and sealing between the panel and the side baffle of the heat exchange tube. This is advantageous to improve the bonding and sealing effect by combining the advantages of different sealing materials, to expand the material selection range of the sealing material and to reduce the cost.

Description

TECHNICAL FIELD

[0001] The present application relates to gas-gas heat exchange technology, in particular to a heat exchange tube and a heat exchanger for gas-gas heat exchange. BACKGROUND

[0002] In a flue gas waste heat recovery device or a flue gas cooling device, a gas-gas heat exchanger is needed to achieve heat exchange between flue gas and air. According to different application occasions, such a gas-gas heat exchanger can be, for example, an air preheater and a flue gas air cooler. In order to maximize energy recovery or obtain better cooling effect, it is generally desirable that the temperature of the flue gas after heat exchange is lower and the temperature of the air is higher. However, when the flue gas temperature is reduced below the condensation dew point, acid dew will be produced, which will cause corrosion of the heat exchange tube and reduce the service life of the heat exchanger.

[0003] To this end, a heat exchange tube made of corrosion-resistant materials such as glass and ceramic is proposed in Chinese Patent No. 201711288625.2, entitled "Heat exchange tube, heat exchanger comprising it and method for manufacturing heat exchange tube", wherein the heat exchange panels and the side baffles enclose to define a flat-shaped internal passage of the heat exchange tube, and are sealingly bonded together by a bonding agent. This heat exchange tube can overcome the corrosion problem of the heat exchange tube caused by flue gas condensation, and is simple to manufacture. However, this technology is not without defects. Due to the high temperature and corrosiveness of the flue gas, the bonding agent used to bond the panels and the side baffles in the above heat exchange tube is prone to damage and failure, making it difficult to maintain the sealing of the heat exchange tube and preventing the gas medium inside and outside the heat exchange tube from being isolated. SUMMARY

[0004] The purpose of the present application is to provide a heat exchange tube and a heat exchanger having the same, to at least partially overcome the deficiencies in the prior art.

[0005] According to one aspect of the present application, a heat exchange tube is provided, which comprises two panels opposite to each other and two side baffles opposite to each other, wherein the panels and the side baffles enclose to define an internal passage of the heat exchange tube, at least one panel and at least one side baffle are separate and sealingly connected together, the at least one side baffle comprises a partition structure extending in a first direction, the partition structure has an abutting surface abutting and connected with the at least one panel in a direction perpendicular to the panel; and the heat exchange tube further comprises at least two different sealing materials applied on the same abutting surface, the at least two different sealing materials are arranged at different positions in a second direction parallel to the panel and perpendicular to the first direction, thereby forming at least two sealing zones each extending in the first direction.

[0006] In some embodiments, the two panels and the two side baffles are all separate from each other, and the partition structure of each of the side baffles has two abutting surfaces opposite to each other for abutting and connecting with one of the two panels along a direction perpendicular to the panel.

[0007] In some embodiments, the at least two different sealing materials include a first sealing material and a second sealing material, and the at least two sealing regions include a first sealing region filled with the first sealing material and a second sealing region filled with the second sealing material.

[0008] Advantageously, the upper limit of the working temperature applicable to the first sealing material is higher than the upper limit of the working temperature applicable to the second sealing material.

[0009] Advantageously, the upper limit of the working temperature applicable to the first sealing material is above 150°C, optionally above 200°C; and the upper limit of the working temperature applicable to the second sealing material is below 150°C, optionally below 100°C.

[0010] Advantageously, the adhesion of the second sealing material is higher than the adhesion of the first sealing material.

[0011] In some embodiments, the at least two sealing regions further include a third sealing region filled with the first sealing material, and the third sealing region is located on the opposite side of the second sealing region from the first sealing region.

[0012] Advantageously, the first sealing material is a non-adhesive sealing material, and the second sealing material is an adhesive sealing material.

[0013] Advantageously, the first sealing material is a solid sealing material, and the second sealing material is a sealant.

[0014] In some embodiments, the at least one abutting surface is divided into at least two sealing surfaces corresponding to the at least two sealing regions respectively, and a sealing groove is formed on at least one of the sealing surfaces for accommodating a corresponding one of the at least two different sealing materials.

[0015] Advantageously, the sealing groove extends along the first direction, and has a rectangular, trapezoidal, semicircular, U-shaped or V-shaped cross-sectional shape perpendicular to the first direction.

[0016] Advantageously, the sealing groove has a jagged or wavy bottom surface.

[0017] In some embodiments, the partition structure of the at least one side baffle further includes two or more sub-partition structures, and the at least two sealing surfaces are located on different sub-partition structures.

[0018] Advantageously, the at least two sealing surfaces include a first sealing surface and a second sealing surface, and a first sealing groove is formed on the first sealing surface, and a second sealing groove is formed on the second sealing surface.

[0019] The first sealing groove and the second sealing groove can have different cross-sectional shapes.

[0020] Advantageously, the at least one side baffle further includes a cross baffle structure integrally formed with or fixed to the partition structure, the cross baffle structure is arranged on at least a portion of the side baffle along the first direction and is located on the opposite side of the internal passage of the heat exchange tube relative to the partition structure, wherein the cross baffle structure has a larger dimension relative to the partition structure in a direction perpendicular to the panel, thereby abutting against the edge of the panel.

[0021] Advantageously, in a direction perpendicular to the panel, the outermost edge of the cross baffle structure is flush with the two panels, and the side of the cross baffle structure opposite to the partition structure has an arc-shaped profile in a cross section perpendicular to the first direction.

[0022] Advantageously, the cross baffle structure is arranged on both ends of the side baffle along the first direction.

[0023] According to another aspect of the present application, a heat exchanger is provided, which includes a housing having an internal space and a plurality of heat exchange tubes supported on the housing and passing through the internal space of the housing, wherein at least one of the heat exchange tubes is the heat exchange tube as described above.

[0024] Advantageously, the heat exchanger is a gas-gas heat exchanger for a first gas and a second gas, the sealing region of the at least two sealing regions of the heat exchange tube closest to the one of the first gas and the second gas with higher temperature in the second direction is a high-temperature-resistant sealing region, and at least one of the other sealing regions is a bonding sealing region, the upper limit of the working temperature applicable to the sealing material filled in the high-temperature-resistant sealing region is higher than the upper limit of the working temperature applicable to the sealing material filled in the bonding sealing region.

[0025] Advantageously, the bonding property of the sealing material filled in the bonding sealing region is higher than the bonding property of the sealing material filled in the high-temperature-resistant sealing region.

[0026] Advantageously, the corrosion resistance of the sealing material filled in the high-temperature-resistant sealing region is higher than the corrosion resistance of the sealing material filled in the bonding sealing region.

[0027] In some embodiments, the at least two sealing zones of the heat exchange tube comprise at least one corrosion-resistant sealing zone between the high-temperature-resistant sealing zone and the adhesive sealing zone, the corrosion resistance of the sealing material filled in the corrosion-resistant sealing zone being higher than the corrosion resistance of the sealing material filled in the high-temperature-resistant sealing zone and the adhesive sealing zone.

[0028] Advantageously, the at least two sealing zones of the heat exchange tube comprise an adhesive sealing zone and two high-temperature-resistant sealing zones on both sides of the adhesive sealing zone, the upper limit of the working temperature applicable to the sealing material filled in the high-temperature-resistant sealing zone being higher than the upper limit of the working temperature applicable to the sealing material filled in the adhesive sealing zone, and the adhesion of the sealing material filled in the adhesive sealing zone being higher than the adhesion of the sealing material filled in the high-temperature-resistant sealing zone.

[0029] Advantageously, the corrosion resistance of the sealing material filled in the high-temperature-resistant sealing zone is higher than the corrosion resistance of the sealing material filled in the adhesive sealing zone.

[0030] According to the heat exchange tube of the embodiments of the present application, different sealing materials are used in different sealing zones on the same abutting surface, which makes it possible to combine sealing materials with different properties to achieve the adhesion and sealing between the side baffle and the panel of the heat exchange tube. This is advantageous for improving the effect of adhesion and sealing by combining the advantages of different sealing materials, expanding the range of material selection, and reducing costs. BRIEF DESCRIPTION OF DRAWINGS

[0031] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments thereof, read in conjunction with the accompanying drawings:

[0032] Figure 1 is a perspective view of an example of a heat exchanger according to an embodiment of the present application;

[0033] Figure 2 is a perspective view of an example of a heat exchange tube according to an embodiment of the present application;

[0034] Figure 3 is Figure 2 is a perspective view of a part of the heat exchange tube shown, in which the upper panel of the heat exchange tube is removed to expose the internal structure;

[0035] Figure 4 is a partially enlarged schematic view of a heat exchange tube according to an embodiment one of the present application;

[0036] Figure 5 is a partially enlarged schematic view of a heat exchange tube according to an embodiment two of the present application;

[0037] Figure 6 is a partially enlarged schematic view of a heat exchange tube according to an embodiment three of the present application;

[0038] Figure 7 Different sealing grooves formed on the abutting surface of the partition structure of the side baffle of the heat exchange tube according to the embodiments of the present application are shown;

[0039] Figure 8 A partial enlarged view of the heat exchange tube according to the fourth embodiment of the present application is shown;

[0040] Figure 9 A partial enlarged view of the heat exchange tube according to the fifth embodiment of the present application is shown;

[0041] Figure 10 Different layouts of the sealing area formed on the side baffle of the heat exchange tube according to the embodiments of the present application are shown schematically;

[0042] Figure 11 Different variants of the side baffle of the heat exchange tube according to the embodiments of the present application and the seal that can be used with the side baffle are shown;

[0043] Figure 12 、 Figure 13 and Figure 14 Different examples of the heat exchange tube according to the embodiments of the present application are shown, in which Figure 11 different side baffles shown in FIGS. 1-4 are respectively combined. DETAILED DESCRIPTION

[0044] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely intended for the purpose of explanation and are not intended to limit the present application. For the purpose of description, only parts related to the present application are shown in the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0045] Figure 1 A perspective view of an example of the heat exchanger according to the embodiments of the present application is shown. As shown in Figure 1 the heat exchanger 1 includes a housing 1a having an internal space and a plurality of heat exchange tubes 10 supported on the housing 1a and passing through the internal space of the housing 1a. In Figure 1 the example shown, the housing 1a includes two sealing plates 1b arranged opposite to each other, and a plurality of mounting through holes 1c are respectively formed on the sealing plates 1b, the two ends of the heat exchange tubes 10 pass through the mounting through holes 1c and are sealingly connected with the mounting through holes 1c. When the heat exchanger 1 is in operation, a first gas flows through the internal passages of the heat exchange tubes 10, and a second gas flows through the space between the heat exchange tubes 10 and the housing 1a, so that the first gas and the second gas realize wall heat exchange inside and outside the heat exchange tubes 10.

[0046] Figure 2A perspective view of an example of a heat exchange tube according to an embodiment of the present application; Figure 3 A perspective view of a portion of a heat exchange tube 10, in which an upper side panel of the heat exchange tube is removed to expose the internal structure. As shown in Figure 2 A perspective view of a portion of a heat exchange tube 10, in which an upper side panel of the heat exchange tube is removed to expose the internal structure. As shown in Figure 2 A perspective view of a portion of a heat exchange tube 10, in which an upper side panel of the heat exchange tube is removed to expose the internal structure. As shown in Figure 3 The heat exchange tube 10 includes two panels 10a opposite to each other and two side baffles 100 opposite to each other, which enclose an internal passage 10b of the heat exchange tube 10.

[0047] In addition, the heat exchange tube 10 can further include an intermediate partition 10c, which can be used to provide intermediate support for the panels 10a, and can also be used to divide the internal passage 10b of the heat exchange tube 10 into different passages.

[0048] Preferably, the panels 10a and the side baffles 100 in the heat exchange tube 10 are made of corrosion-resistant materials such as glass, ceramic, graphite, or silicon carbide, so as to improve the corrosion resistance of the heat exchange tube and the heat exchanger, thereby improving the heat exchange efficiency.

[0049] In the example shown in Figure 2 In the example shown in Figure 3 Each side baffle 100 includes a partition structure 111 extending in the x direction, and the partition structure 111 has two abutting surfaces 120 opposite to each other, which are used to abut and connect with the upper and lower panels 10a in the z direction perpendicular to the panels 10a.

[0050] However, it should be understood that the present application is not limited to the above case. For example, one of the side baffles 100 can be continuously or fixedly connected with the upper and lower panels 10a. This can be achieved by, for example, folding a glass plate in a hot melt state to form a folded structure with a cross section in the shape of "U". Alternatively, one of the side baffles 100 can be continuously or fixedly connected with one of the panels 10a. This can be achieved by, for example, bending or welding. The heat exchange tube according to an embodiment of the present application has at least one panel and at least one side baffle that are separately and sealingly connected together, the at least one side baffle includes a partition structure, and the partition structure has at least one abutting surface that abuts and connects with the at least one panel.

[0051] The heat exchange tube according to an embodiment of the present application includes at least two different sealing materials applied on an abutting surface, the at least two different sealing materials are arranged at different positions in the y direction parallel to the panel and perpendicular to the x direction, thereby forming at least two sealing zones each extending in the x direction.

[0052] In some embodiments, as Figure 3As shown, the abutting surface 120 is formed with a first sealing area m1 and a second sealing area m2 extending along the x direction, on which the first sealing material 21 and the second sealing material 22 are respectively applied.

[0053] It should be understood that, Figure 3 and the first sealing area m1 and the second sealing area m2 as well as the first sealing material 21 and the second sealing material 22 shown in the following Figure 4 , Figure 5 , Figure 6 , Figure 8 and Figure 9 are only exemplary and schematic, for distinguishing the two sealing areas and the two different sealing materials, and are not limited to that the first sealing area m1 / first sealing material 21 is closer to the outer side of the heat exchange tube 10 in the y direction while the second sealing area m2 / second sealing material 22 is closer to the inner side of the heat exchange tube 10 in the y direction.

[0054] According to the heat exchange tube of the embodiment of the present application, since at least two sealing areas arranged transversely (along the y direction) are provided on the same abutting surface, and different sealing materials can be used in different sealing areas, it is possible to combine sealing materials with different properties to achieve the bonding and sealing between the panel and the side baffle of the heat exchange tube. On the one hand, this is conducive to improving the effect of bonding and sealing by combining the advantages of different sealing materials; on the other hand, compared with using a single sealing material with excellent performance in all aspects (such as both high temperature resistance and corrosion resistance, and strong bonding force), this is conducive to expanding the material selection range of the sealing material and reducing the cost.

[0055] Preferably, the upper limit of the working temperature applicable to one of the sealing materials (such as the first sealing material 21) is higher than the upper limit of the working temperature applicable to the other sealing material (such as the second sealing material 22). For example, the upper limit of the working temperature applicable to the first sealing material is above 150°C, and optionally above 200°C; while the upper limit of the working temperature applicable to the second sealing material is below 150°C, and optionally below 100°C. In short, it is preferred that one of the sealing materials is a high-temperature-resistant sealing material.

[0056] In the case where the upper limit of the working temperature applicable to the first sealing material is higher than the upper limit of the working temperature applicable to the second sealing material, it is preferred that the bonding force of the second sealing material is higher than that of the first sealing material. In short, it is preferred that one of the sealing materials is a high-temperature-resistant sealing material, and the other is a sealing material with strong bonding force.

[0057] In some embodiments, the first sealing material may be a non-adhesive sealing material, and the second sealing material may be an adhesive sealing material. Preferably, the first sealing material is also a high-temperature resistant sealing material (having a high upper limit of operating temperature). Non-adhesive sealing materials include, but are not limited to, carbon fiber, graphite, polytetrafluoroethylene, ceramic fiber, and fluororubber. Adhesive sealing materials (e.g., the second sealing material) may include, but are not limited to, silicone, silicone sealant, epoxy resin, and acrylate. Advantageously, the first sealing material may be a solid sealing material, while the second sealing material may be a sealant.

[0058] Currently available sealing materials are scarce and expensive, as they possess both high-temperature resistance and strong adhesion. Typically, high-temperature resistant sealing materials lack sufficient adhesion to maintain a proper bond between the panel and side baffles; while many strong-adhesive sealing materials (sealants) are not heat-resistant and fail at high temperatures, losing their bonding and sealing capabilities. In view of the above, in the heat exchange tube according to embodiments of the present invention, by combining high-temperature resistant sealing materials and non-heat-resistant but strong-adhesive sealing materials in different sealing zones, the high-temperature resistant sealing material can be used to separate high-temperature gases from the non-heat-resistant sealing material to protect the latter, thereby better utilizing the latter's strong adhesion advantage and achieving a connection and seal between the panel and side baffles that is both heat-resistant and has strong adhesion as a whole.

[0059] Next, we will combine Figures 4 to 9 The present invention describes heat exchange tubes according to different embodiments.

[0060] Figure 4 This is a partially enlarged schematic diagram of the heat exchange tube according to Embodiment 1 of the present invention. The right side enlargedly shows the structure of the side baffle sealingly connected to the upper and lower panels, while the left side, in a cross-sectional view, enlargedly shows the structure of the upper abutment surface of the side baffle sealingly connected to the upper panel. Figure 4 As shown, in the heat exchange tube according to Embodiment 1, the abutting surface 120A of the partition structure 111 of the side baffle 100A is formed as a uniform surface (e.g., a flat surface or a surface with microgrooves). Different sealing materials 21 and 22 are applied side by side to the abutting surface 120A to form two sealing areas m1 and m2, each extending along the x-direction and arranged at different positions in the y-direction.

[0061] Similarly, Figure 5 A partially enlarged view shows the heat exchange tube according to Embodiment 2 of the present invention. For example... Figure 5As shown, in the heat exchange tube according to Embodiment 2, the abutting surface 120B of the partition structure 111 of the side baffle 100B is divided into two sealing surfaces 121 and 122 corresponding to the sealing areas m1 and m2, respectively. The sealing surface 121 is formed as a uniform surface (e.g., a flat surface or a surface with microgrooves), and a sealing groove 130 is formed on the sealing surface 122. Sealing material 21 is applied to the sealing surface 121, and sealing material 22 is applied to the sealing surface 122 and accommodated in the sealing groove 130.

[0062] although Figure 5 The diagram shows a sealing groove 130 formed on the sealing surface 122 near the internal channel of the heat exchange tube, but this is not limiting. In other examples, the sealing groove 130 can be formed on, for example... Figure 5 The sealing surface 121 near the outside of the heat exchange tube is shown.

[0063] Figure 6 This is a partially enlarged schematic diagram of the heat exchange tube according to Embodiment 3 of the present invention. Figure 6 As shown, in the heat exchange tube according to Embodiment 3, the abutting surface 120C of the partition structure 111 of the side baffle 100C is divided into two sealing surfaces 121 and 122 corresponding to the sealing areas m1 and m2 respectively. Sealing grooves 131 and 132 are formed on sealing surfaces 121 and 122 respectively, for accommodating sealing material 21 and sealing material 22 respectively.

[0064] although Figure 5 , Figure 6 The sealing grooves shown all have rectangular cross-sections, but this is not limiting. Sealing grooves can have cross-sectional shapes other than rectangles. For example, as... Figure 7 As shown in figures (a) to (c), the sealing groove 130 can have a rectangular, semi-circular, or V-shaped cross-sectional shape. Furthermore, the sealing groove can also have any suitable cross-sectional shape, such as trapezoidal or U-shaped. Advantageously, as... Figure 7 As shown in figures (d) and (e), the sealing groove can have a serrated or wavy bottom surface 130a. This increases the contact area between the sealing material and the abutting surface, which is beneficial for improving sealing performance and / or adhesion.

[0065] Furthermore, despite Figure 6 and Figure 7 The two sealing grooves on the same abutting surface shown have the same structure (e.g., the same cross-section), but this is not limiting. In advantageous examples, the two sealing grooves on the same abutting surface may have different structures, such as different cross-sectional shapes, different depths, or different bottom surface structures. In some cases, this is advantageous for accommodating the properties of different sealing materials.

[0066] Figure 8Fig. 4 is a partial enlarged view of a heat exchange tube according to Embodiment Four of the present application. In the heat exchange tube according to Embodiment Four, three sealing zones m1, m2, m3 are formed between the panel 10a and the side baffle 100D. Figure 8 In the illustrated example, the abutting surface 120D is divided into three sealing surfaces 121, 122, 123 corresponding to the three sealing zones respectively, each of which has a sealing groove formed thereon for accommodating a sealing material 21, 22, 23. At least two of the sealing materials 21, 22, 23 are different from each other. Preferably, the sealing material 22 in the middle is different from the sealing materials 21 and 23. It should be understood that, according to the present embodiment, the three sealing grooves can have the same or different structures; furthermore, the three sealing surfaces are not limited to all having a sealing groove formed thereon, but one or two of the sealing surfaces can have a sealing groove formed thereon, or none of the three sealing surfaces has a sealing groove formed thereon.

[0067] Figure 9 Fig. 5 is a partial enlarged view of a heat exchange tube according to Embodiment Five of the present application. In the heat exchange tube according to Embodiment Five, the partition structure of the side baffle includes two or more sub-partition structures, and at least two sealing surfaces are located on different sub-partition structures. Figure 9 In the illustrated example, the partition structure 111 of the side baffle 100E includes two sub-partition structures 111a and 111b, and the two sealing surfaces 121, 122 of the abutting surface 120E are located on the sub-partition structures 111a, 111b respectively. As shown in the figure, the sealing surfaces 121, 122 can each have a sealing groove formed thereon, but are not limited thereto. For example, any one of the sealing surfaces can not have a sealing groove formed thereon. Figure 9

[0068] It should be understood that, according to the heat exchange tube of Embodiment Five, the number of sub-partition structures included in one side baffle is not limited to two, but can also be three or more, and a single sub-partition structure can have more than one sealing surface (e.g. two sealing surfaces) corresponding to more than one sealing zone.

[0069] The above describes the heat exchange tube according to Embodiment Four of the present application. Figures 4 to 9 It is introduced that the heat exchange tube according to different embodiments can have sealing zones with different numbers and structures. Different sealing materials can be used in these sealing zones. In the present application, considering the temperature of the gas and the influence of corrosion, the sealing materials in different sealing zones are arranged optimally to obtain different layouts. Next, the different layouts formed in the sealing zones according to the differences in the sealing materials will be introduced with reference to Figure 10

[0070] As described above with reference to Figure 1 ​​As already introduced, the heat exchanger 1 according to the present application is used for heat exchange between a first gas and a second gas, the gas having the higher temperature of the two being referred to as "high-temperature gas" and the gas having the lower temperature of the two being referred to as "low-temperature gas".

[0071] Figure 10 The middle diagram (a) shows that of the two sealing regions of the heat exchange tube, the sealing region closer to the high-temperature gas in the y direction is a high-temperature-resistant sealing region 31, and the other sealing region is a bonding sealing region 32. The upper limit of the working temperature to which the sealing material filled in the high-temperature-resistant sealing region 31 is applicable is higher than the upper limit of the working temperature to which the sealing material filled in the bonding sealing region 32 is applicable.

[0072] Preferably, the bonding property of the sealing material filled in the bonding sealing region 32 is higher than the bonding property of the sealing material filled in the high-temperature-resistant sealing region 31.

[0073] Preferably, the corrosion resistance of the sealing material filled in the high-temperature-resistant sealing region 31 is higher than the corrosion resistance of the sealing material filled in the bonding sealing region 32.

[0074] Figure 10 The middle diagram (b) shows that of the three sealing regions of the heat exchange tube, the sealing region closest to the high-temperature gas in the y direction is a high-temperature-resistant sealing region 31, the sealing region closest to the low-temperature gas is a bonding sealing region 32, and the sealing region between the high-temperature-resistant sealing region 31 and the bonding sealing region 32 is a corrosion-resistant sealing region 33. The corrosion resistance of the sealing material filled in the corrosion-resistant sealing region 33 is higher than the corrosion resistance of the sealing material filled in the high-temperature-resistant sealing region 31 and the bonding sealing region 32.

[0075] Figure 10 The middle diagram (c) shows that of the three sealing regions of the heat exchange tube, there is a bonding sealing region 32 and two high-temperature-resistant sealing regions 31 located on both sides of the bonding sealing region 32. Preferably, the upper limit of the working temperature to which the sealing material filled in the high-temperature-resistant sealing region 31 is applicable is higher than the upper limit of the working temperature to which the sealing material filled in the bonding sealing region 32 is applicable, and the bonding property of the sealing material filled in the bonding sealing region 32 is higher than the bonding property of the sealing material filled in the high-temperature-resistant sealing region 31. The heat exchange tube thus configured can be flexibly applied to different situations in which the high-temperature gas is located inside or outside the heat exchange tube. Preferably, the corrosion resistance of the sealing material filled in the high-temperature-resistant sealing region 31 is higher than the corrosion resistance of the sealing material filled in the bonding sealing region 32.

[0076] Figure 10The diagram (d) shows that in the three sealing zones of the heat exchanger tube, the sealing zone closest to the high-temperature gas along the y-direction is the first high-temperature resistant sealing zone 31A, the sealing zone closest to the low-temperature gas is the bonding sealing zone 32, and the middle sealing zone is the second high-temperature resistant sealing zone 31B. The sealing material filled in the first high-temperature resistant sealing zone 31A has higher corrosion resistance than the sealing material filled in the second high-temperature resistant sealing zone 31B. Given that sealing materials that are both high-temperature resistant and corrosion resistant are more expensive than those that are only high-temperature resistant but not corrosion resistant, the sealing zone layout in this example helps reduce the manufacturing cost of the heat exchanger tube and heat exchanger.

[0077] Furthermore, as shown in the figure, depending on the specific application, the widths of the various sealing zones in the y-direction can be equal or unequal. For example, in some cases, the adhesive sealing zone 32 can have a larger width to provide sufficient adhesive force.

[0078] Return to reference Figures 2 to 8 As can be seen, the side baffle 100 and its various examples 100A-100E, in addition to the partition structure 111, may also include a transverse baffle structure 112. The transverse baffle structure 112 is integrally formed or fixed to the partition structure 111 and is located on the opposite side of the internal channel 10b of the heat exchange tube relative to the partition structure 111. The transverse baffle structure 112 has a larger dimension relative to the partition structure 111 in the z-direction perpendicular to the panel 10a, thereby abutting against the edge of the panel 10a. Figures 2 to 8 In the example shown, the crossbar structure 112 is provided along the entire length of the side baffle in the x direction.

[0079] Preferably, such as Figures 2 to 6 , Figure 7 and Figure 8 As shown, in the z-direction perpendicular to panel 10a, the outermost edge of the transverse baffle structure 112 is flush with both panels 10a, and the side of the transverse baffle structure 112 opposite to the partition structure 111 has an arc-shaped profile in the cross-section perpendicular to the x-direction. This facilitates the fitting and sealing of the mounting through holes on the two sealing plates of the heat exchanger shell with the heat exchanger tubes.

[0080] In heat exchange tubes according to other embodiments of the present invention, the side baffles may not include a transverse baffle structure or may include a transverse baffle structure with a different structure. Figure 11 Several variations of a side baffle that can be used in a heat exchange tube according to embodiments of the present invention are shown, as well as seals that can be used in conjunction with the side baffle.

[0081] Figure 11 The side baffle 100' shown in figure (a) does not include the crossbar structure. Figure 12 The heat exchange tube 10' with side baffle 100' is shown.

[0082] Figure 11In the side dam 100" shown in the middle drawing (b), the cross dam structure 112 is arranged at both ends of the side dam 100" in the x direction. Figure 13 The heat exchange tube 10" with the side dam 100" combined is shown.

[0083] Similarly, preferably in the z direction perpendicular to the panel 10a, the outermost edge of the cross dam structure 112 is flush with the two panels 10a, and the side of the cross dam structure 112 opposite the partition structure 111 has an arc-shaped profile in the cross section perpendicular to the x direction. This facilitates the cooperation and sealing of the heat exchange tube with the mounting through holes on the two sealing plates of the heat exchanger shell.

[0084] Figure 11 In the side dam 100"' shown in the middle drawing (c), the cross dam structure 112 is arranged at the middle of the side dam 100"' in the x direction.

[0085] Figure 11 The middle drawing (d) shows a sealing member 200 that can be used at both ends of the side dam, for example. As shown, the main body of the sealing member 200 is a cross dam portion 211, which can have the same or similar structure as the cross dam portion 112 of the side dam 100", so as to cooperate and seal with the mounting through holes on the sealing plates. Preferably, a slightly protruding fitting portion 212 can also be formed at the middle of the cross dam portion 211, for fitting between the two panels, so that the sealing member 200 is better positioned relative to the panels. Figure 14 The heat exchange tube 10"' with the sealing member 200 combined at both ends of the side dam 100"' is shown.

[0086] The above description is merely preferred embodiments of the present application and a description of the principles of the technology used. It should be understood by those skilled in the art that the scope of the application involved in the present application is not limited to the technical solutions formed by the specific combinations of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or equivalent features without departing from the inventive concept. For example, the above features can be replaced with technical features disclosed in the present application (but not limited to) having similar functions to form technical solutions.

Claims

1. A heat exchange tube comprising two panels facing each other and two side baffles facing each other, wherein, The face plate and the side baffle enclose to define an internal passage of the heat exchange tube, The at least one face plate is separate from the at least one side baffle and is sealingly connected to the at least one side baffle, the at least one side baffle comprises a partition structure extending along a first direction, the partition structure has an abutting surface abutting and connected to the at least one face plate along a direction perpendicular to the face plate; The heat exchange tube further comprises at least two different sealing materials applied on the same abutting surface, the at least two different sealing materials are arranged at different positions in a second direction parallel to the face plate and perpendicular to the first direction, thereby forming at least two sealing zones each extending along the first direction; The at least two different sealing materials comprise a first sealing material and a second sealing material, and the at least two sealing zones comprise a first sealing zone filled with the first sealing material and a second sealing zone filled with the second sealing material; and An upper limit of a working temperature applicable to the first sealing material is higher than an upper limit of a working temperature applicable to the second sealing material.

2. The heat exchange tube of claim 1, wherein, The two face plates and the two side baffles are separate from each other, and the partition structure of each of the side baffles has two abutting surfaces opposite to each other for abutting and connecting to one of the two face plates along a direction perpendicular to the face plate.

3. The heat exchange tube of claim 1, wherein, An upper limit of a working temperature applicable to the first sealing material is above 150 DEG C, optionally above 200 DEG C; and an upper limit of a working temperature applicable to the second sealing material is below 150 DEG C, optionally below 100 DEG C.

4. The heat exchange tube of claim 1, wherein, The second sealing material has a higher adhesion than the first sealing material.

5. The heat exchange tube of claim 1, wherein, The at least two sealing zones further comprise a third sealing zone filled with the first sealing material, and the third sealing zone is located on two sides of the second sealing zone opposite to each other.

6. The heat exchange tube of any one of claims 1-5, wherein, The first sealing material is a non-adhesive sealing material, and the second sealing material is an adhesive sealing material.

7. The heat exchange tube of any one of claims 1-5, wherein, The first sealing material is a solid sealing material, and the second sealing material is a sealing glue.

8. The heat exchange tube of any one of claims 1-5, wherein, The at least one abutting surface is divided into at least two sealing surfaces corresponding to the at least two sealing zones respectively, and a sealing groove is formed on at least one of the sealing surfaces for accommodating a corresponding one of the at least two different sealing materials.

9. The heat exchange tube of claim 8, wherein, The sealing groove extends along the first direction and has a rectangular, trapezoidal, semicircular, U-shaped or V-shaped cross-sectional shape perpendicular to the first direction.

10. The heat exchange tube of claim 8, wherein, The sealing groove has a bottom surface in a zigzag or wavy shape.

11. The heat exchange tube of claim 8, wherein, The partition structure of the at least one side baffle comprises two or more sub-partition structures, and the at least two sealing surfaces are located on different sub-partition structures.

12. The heat exchange tube of claim 8, wherein, The at least two sealing surfaces comprise a first sealing surface and a second sealing surface, and a first sealing groove is formed on the first sealing surface, and a second sealing groove is formed on the second sealing surface.

13. The heat exchange tube of claim 11, wherein, The at least two sealing surfaces comprise a first sealing surface and a second sealing surface, and a first sealing groove is formed on the first sealing surface, and a second sealing groove is formed on the second sealing surface.

14. The heat exchange tube of claim 12, wherein, The first sealing groove and the second sealing groove have different cross-sectional shapes.

15. The heat exchange tube of claim 13, wherein, The first seal groove and the second seal groove have different cross-sectional shapes.

16. The heat exchange tube of any one of claims 1-5, wherein, At least one of the side baffles further comprises a cross-bar structure integrally formed with or fixed to the partition structure, the cross-bar structure being arranged on at least a portion of the side baffle along the first direction and located on opposite sides of the internal passage of the heat exchange tube relative to the partition structure, wherein the cross-bar structure has a larger dimension relative to the partition structure in a direction perpendicular to the panel, thereby abutting against the edge of the panel.

17. The heat exchange tube of claim 16, wherein, In a direction perpendicular to the panel, the outermost edge of the cross-bar structure is flush with the two panels, and the side of the cross-bar structure opposite to the partition structure has an arc-shaped profile in a cross-section perpendicular to the first direction.

18. The heat exchange tube of claim 17, wherein, The cross-bar structure is arranged on both ends of the side baffle along the first direction.

19. A heat exchanger comprising a housing having an internal space and a plurality of heat exchange tubes supported on the housing and passing through the internal space of the housing, wherein at least one of the heat exchange tubes is the heat exchange tube according to any one of claims 1-18.

20. The heat exchanger of claim 19, wherein, The heat exchanger is a gas-gas heat exchanger for a first gas and a second gas, the seal region of the at least two seal regions of the heat exchange tube closest to the higher-temperature one of the first gas and the second gas in the second direction is a high-temperature-resistant seal region, at least one of the other seal regions is a bonding seal region, and the upper limit of the working temperature applicable to the sealing material filled in the high-temperature-resistant seal region is higher than the upper limit of the working temperature applicable to the sealing material filled in the bonding seal region.

21. The heat exchanger of claim 20, wherein, The bonding property of the sealing material filled in the bonding seal region is higher than the bonding property of the sealing material filled in the high-temperature-resistant seal region.

22. The heat exchanger of claim 20 or 21, wherein, The corrosion resistance of the sealing material filled in the high-temperature-resistant seal region is higher than the corrosion resistance of the sealing material filled in the bonding seal region.

23. The heat exchanger of claim 20 or 21, wherein, The at least two seal regions of the heat exchange tube further comprise at least one corrosion-resistant seal region between the high-temperature-resistant seal region and the bonding seal region, and the corrosion resistance of the sealing material filled in the corrosion-resistant seal region is higher than the corrosion resistance of the sealing material filled in the high-temperature-resistant seal region and the bonding seal region.

24. The heat exchanger of claim 19, wherein, The at least two seal regions of the heat exchange tube comprise a bonding seal region and two high-temperature-resistant seal regions located on both sides of the bonding seal region, the upper limit of the working temperature applicable to the sealing material filled in the high-temperature-resistant seal region is higher than the upper limit of the working temperature applicable to the sealing material filled in the bonding seal region, and the bonding property of the sealing material filled in the bonding seal region is higher than the bonding property of the sealing material filled in the high-temperature-resistant seal region.

25. The heat exchanger of claim 24, wherein, The corrosion resistance of the sealing material filled in the high-temperature-resistant seal region is higher than the corrosion resistance of the sealing material filled in the bonding seal region.

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