CN219284065U - Heat exchange tube and heat exchanger - Google Patents

Abstract

The application discloses a heat exchange tube and have its heat exchanger, in this heat exchange tube, at least one side shield includes the partition structure that extends along first direction, and the partition structure has the abutting surface that abuts against and connects with the panel to the heat exchange tube still includes at least two kinds of different sealing material that apply on same abutting surface, thereby forms at least two sealing areas that arrange in different positions in the second direction that is parallel to the panel and perpendicular to first direction. The heat exchange tube provided by the embodiment of the utility model can combine sealing materials with different characteristics to realize bonding and sealing between the panel and the side baffle of the heat exchange tube. The advantages of different sealing materials are combined to improve the bonding and sealing effects, the material selection range of the sealing materials is enlarged, and the cost is reduced.

Description

Heat exchange tube and heat exchanger

Technical Field

The utility model relates to a gas-gas heat exchange technology, in particular to a heat exchange tube and a heat exchanger for gas-gas heat exchange.

Background

And a gas-gas heat exchanger is needed to be adopted in the flue gas waste heat recovery device or the flue gas cooling device to realize heat exchange between flue gas and air. Such gas-gas heat exchangers may be, for example, air preheaters, flue gas air coolers, etc., depending on the application. In order to maximize energy recovery or obtain a better cooling effect, it is generally desirable that the temperature of the flue gas after heat exchange is lower and that the air temperature is higher. However, when the temperature of the flue gas is reduced below the condensation dew point, acid dew is generated, corrosion is caused to the heat exchange tube, and the service life of the heat exchanger is reduced.

For this purpose, chinese patent application No. 201711288625.2 entitled "heat exchange tube, heat exchanger including the same, and method of manufacturing the heat exchange tube" proposes a heat exchange tube made of corrosion resistant materials such as glass and ceramic, wherein heat exchange panels and side baffles enclose an inner channel of the heat exchange tube defining a flat shape, and are sealingly bonded together by an adhesive. The heat exchange tube can overcome the problem of corrosion of the heat exchange tube caused by flue gas condensation, and is simple and convenient to manufacture. However, this technique is not without drawbacks. Due to the high temperature and corrosiveness of the flue gas, the adhesive used for bonding the panel and the side baffle in the heat exchange tube is easy to damage and lose efficacy, so that the tightness of the heat exchange tube is difficult to maintain, and the gas medium inside and outside the heat exchange tube cannot be isolated.

Disclosure of Invention

The utility model aims to provide a heat exchange tube and a heat exchanger with the heat exchange tube, so as to at least partially overcome the defects in the prior art.

According to one aspect of the present utility model there is provided a heat exchange tube comprising two panels opposite each other and two side dams opposite each other, wherein the panels and side dams enclose an internal channel defining the heat exchange tube, at least one panel being separate from and sealingly connected to at least one side dam, the at least one side dam comprising a partition structure extending in a first direction, the partition structure having an abutment surface abutting and connected to the at least one panel in a direction perpendicular to the panels; and the heat exchange tube further comprises at least two different sealing materials applied on the same abutment surface, the at least two different sealing materials being 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.

In some embodiments, the two panels and the two side guards are each separate from each other, and the separation structure of each side guard has two abutment surfaces opposite to each other for abutment and connection with one of the two panels, respectively, in a direction perpendicular to the panels.

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.

Advantageously, the upper limit of the operating temperature to which the first sealing material is applied is higher than the upper limit of the operating temperature to which the second sealing material is applied.

Advantageously, the upper limit of the working temperature to which the first sealing material is adapted is above 150 ℃, optionally above 200 ℃; and the upper limit of the working temperature to which the second sealing material is adapted is below 150 ℃, optionally below 100 ℃.

Advantageously, the second sealing material has a higher adhesion than the first sealing material.

In some embodiments, the at least two sealing regions further comprise a third sealing region filled with a first sealing material, and the third sealing region and the first sealing region are located on opposite sides of the second sealing region from each other.

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

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

In some embodiments, the at least one abutment 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 receiving a corresponding one of the at least two different sealing materials.

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.

Advantageously, the sealing groove has a serrated or wavy bottom surface.

In some embodiments, the separation structure of the at least one side dam comprises more than two sub-separation structures, and the at least two sealing surfaces are located on different sub-separation structures.

Advantageously, the at least two sealing surfaces comprise a first sealing surface and a second sealing surface, and the first sealing surface has a first sealing groove formed therein and the second sealing surface has a second sealing groove formed therein.

The first seal groove and the second seal groove may have different cross-sectional shapes.

Advantageously, at least one of the side dams further comprises a rail structure integrally formed with or fixed to the partition structure, the rail structure being arranged on at least a portion of the side dam in the first direction and being located on the opposite side of the inner channel of the heat exchange tubes with respect to the partition structure, wherein the rail structure has a larger dimension with respect to the partition structure in a direction perpendicular to the panels so as to abut against the edges of the panels.

Advantageously, in a direction perpendicular to the panels, the outermost edge of the rail structure is flush with the two panels, and the side of the rail structure opposite to the partition structure has an arcuate profile in a cross section perpendicular to the first direction.

Advantageously, the rail structure is provided on both ends of the side dams in the first direction.

According to another aspect of the present utility model, there is provided a heat exchanger comprising a housing having an interior space and a plurality of heat exchange tubes supported on and passing through the interior space of the housing, wherein at least one of the heat exchange tubes is a heat exchange tube as described above.

Advantageously, the heat exchanger is a gas-gas heat exchanger for a first gas and a second gas, a sealing zone of the at least two sealing zones of the heat exchange tube closest to a higher temperature of the first gas and the second gas in the second direction is a high temperature resistant sealing zone, at least one sealing zone of the other sealing zones is a bonding sealing zone, and an upper limit of an operating temperature for a sealing material filled in the high temperature resistant sealing zone is higher than an upper limit of an operating temperature for a sealing material filled in the bonding sealing zone.

Advantageously, the adhesion of the sealing material filled in the adhesive sealing zone is higher than the adhesion of the sealing material filled in the high temperature resistant sealing zone.

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.

In some embodiments, the at least two sealing zones of the heat exchange tube further comprise at least one corrosion resistant sealing zone located between the high temperature resistant sealing zone and the bonding 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 bonding sealing zone.

Advantageously, the at least two sealing zones of the heat exchange tube comprise a bonding sealing zone and two high temperature resistant sealing zones located on both sides of the bonding sealing zone, the upper limit of the working temperature to which the sealing material filled in the high temperature resistant sealing zone is applied is higher than the upper limit of the working temperature to which the sealing material filled in the bonding sealing zone is applied, and the bonding property of the sealing material filled in the bonding sealing zone is higher than the bonding property of the sealing material filled in the high temperature resistant sealing zone.

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.

In the heat exchange tube according to the embodiment of the utility model, different sealing materials are adopted in different sealing areas on the same abutting surface, which enables the bonding and sealing between the panel and the side baffle of the heat exchange tube to be achieved by combining sealing materials of different characteristics. The advantages of different sealing materials are combined to improve the bonding and sealing effects, the material selection range of the sealing materials is enlarged, and the cost is reduced.

Drawings

Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings in which:

fig. 1 is a perspective view of an example of a heat exchanger according to an embodiment of the present utility model;

fig. 2 is a perspective view of an example of a heat exchange tube according to an embodiment of the present utility model;

FIG. 3 is a perspective view of a portion of the heat exchange tube of FIG. 2 with the upper side panel of the heat exchange tube removed to reveal the internal construction;

FIG. 4 is an enlarged schematic view of a portion of a heat exchange tube according to a first embodiment of the present utility model;

FIG. 5 is an enlarged schematic view of a heat exchange tube according to a second embodiment of the present utility model;

FIG. 6 is an enlarged partial schematic view of a heat exchange tube according to a third embodiment of the present utility model;

FIG. 7 illustrates various examples of side dams that may be used in heat exchange tubes according to embodiments of the present utility model in which different seal grooves are formed in the abutting surfaces of the dividing structure;

FIG. 8 is an enlarged partial schematic view of a heat exchange tube according to a fourth embodiment of the present utility model;

FIG. 9 is an enlarged partial schematic view of a heat exchange tube according to a fifth embodiment of the present utility model;

FIG. 10 schematically illustrates various arrangements of seal areas formed on side dams in heat exchange tubes in accordance with embodiments of the present utility model;

FIG. 11 illustrates a number of variations of side dams that may be used with heat exchange tubes according to embodiments of the utility model and seals that may be used with the side dams;

fig. 12, 13 and 14 show different examples of the heat exchange tube according to the embodiment of the present utility model, in which different side shields shown in fig. 11 are respectively incorporated.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. For convenience of description, only parts related to the utility model are shown in the drawings. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.

Fig. 1 is a perspective view of an example of a heat exchanger according to an embodiment of the present utility model. As shown in fig. 1, the heat exchanger 1 includes a housing 1a having an inner space, and a plurality of heat exchange tubes 10 supported on the housing 1a and passing through the inner space of the housing 1 a. In the example shown in fig. 1, the housing 1a includes two sealing plates 1b disposed opposite to each other, a plurality of mounting through holes 1c are formed in each of the sealing plates 1b, and both ends of the heat exchange tube 10 pass through the mounting through holes 1c to be fitted and hermetically connected with the mounting through holes 1 c. When the heat exchanger 1 works, the first gas flows through the internal channel of the heat exchange tube 10, and the second gas flows through the space between the heat exchange tube 10 and the shell 1a, so that the first gas and the second gas realize partition wall heat exchange inside and outside the heat exchange tube 10.

Fig. 2 is a perspective view of an example of a heat exchange tube according to an embodiment of the present utility model; fig. 3 is a perspective view of a portion of the heat exchange tube 10 shown in fig. 2 with the upper side panel of the heat exchange tube removed to reveal the internal construction. As shown in fig. 2 and 3, the heat exchange tube 10 includes two panels 10a opposite to each other and two side shields 100 opposite to each other, and the panels 10a and the side shields 100 enclose an inner channel 10b of the heat exchange tube 10.

Furthermore, the heat exchange tube 10 may also include an intermediate baffle 10c, which may be used to provide intermediate support for the panel 10 a; additionally, it is also possible to divide the inner channel 10b of the heat exchange tube 10 into different channels.

Preferably, the panel 10a and the side baffle 100 in the heat exchange tube 10 are made of corrosion resistant materials such as glass, ceramic, graphite or silicon carbide, etc. to improve the corrosion resistance of the heat exchange tube and the heat exchanger, thereby improving the heat exchange efficiency.

In the example shown in fig. 2 and 3, the two panels 10a and the two side guards 100 are each separate from each other and sealingly connected together. Each side dam 100 includes a partition structure 111 extending in the x-direction, and the partition structure 111 has two abutment surfaces 120 opposite to each other for abutment and connection with the upper and lower two panels 10a, respectively, in the z-direction perpendicular to the panels 10 a.

However, it should be understood that the present utility model is not limited to the above. For example, one of the side guards 100 may be material continuous or fixedly attached to the upper and lower panels 10 a. This can be achieved, for example, by folding a glass sheet in half when it is in the hot-melt state to form a folded structure having a "U" shaped cross section. Alternatively, one of the side guards 100 may be material continuous or fixedly attached to one of the panels 10 a. This can be achieved by, for example, bending or welding. According to the heat exchange tube of the embodiment of the present utility model, at least one panel and at least one side barrier are separated and sealingly connected together, the at least one side barrier includes a partition structure, and the partition structure has at least one abutment surface abutting and connected with the at least one panel.

The heat exchange tube according to an embodiment of the present utility model includes at least two different sealing materials applied on an abutment surface, the at least two different sealing materials being arranged at different positions in a y-direction parallel to the panel and perpendicular to the x-direction, thereby forming at least two sealing regions each extending in the x-direction.

In some embodiments, as shown in fig. 3, a first sealing region m1 and a second sealing region m2 extending in the x-direction are formed on the abutment surface 120, to which a first sealing material 21 and a second sealing material 22 are applied, respectively.

It should be understood that the relative positions of the first sealing region m1 and the second sealing region m2 and the first sealing material 21 and the second sealing material 22 in the y direction shown in fig. 3 and fig. 4, 5, 6, 8 and 9 to be described below are merely exemplary and illustrative for distinguishing between two sealing regions and two different sealing materials, and are not limited to the first sealing region m 1/the first sealing material 21 being closer to the outside of the heat exchange tube 10 in the y direction and the second sealing region m 2/the second sealing material 22 being closer to the inside of the heat exchange tube 10 in the y direction.

In the heat exchange tube according to the embodiment of the utility model, since at least two sealing areas arranged laterally (in the y-direction) are provided on the same abutting surface, and different sealing materials can be employed in different sealing areas, this enables the bonding and sealing between the panel and the side barrier of the heat exchange tube to be achieved by combining sealing materials of different characteristics. On the one hand, this is advantageous in combination with the advantages of different sealing materials to improve the bonding and sealing effect; on the other hand, compared with the sealing material which is single and has better performance (such as high temperature resistance, corrosion resistance and strong binding force), the sealing material is beneficial to expanding the material selection range of the sealing material and reducing the cost.

Preferably, the upper limit of the operating temperature to which one of the sealing materials (e.g., the first sealing material 21) is applied is higher than the upper limit of the operating temperature to which the other sealing material (e.g., the second sealing material 22) is applied. For example, the upper limit of the working temperature to which the first sealing material is applied is 150 ℃ or higher, optionally 200 ℃ or higher; and the upper limit of the working temperature to which the second sealing material is adapted is below 150 c, optionally below 100 c. In short, one of the sealing materials is preferably a high-temperature resistant sealing material.

In the case where the upper limit of the operating temperature to which the first sealing material is applied is higher than the upper limit of the operating temperature to which the second sealing material is applied, it is preferable that the adhesion of the second sealing material is higher than the adhesion of the first sealing material. In short, it is preferable that one of the sealing materials is a high temperature resistant sealing material, and the other sealing material is a strong adhesive sealing material.

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 (with a higher upper operating temperature limit) sealing material. Non-adhesive sealing materials include, but are not limited to: carbon fiber, graphite, polytetrafluoroethylene, ceramic fiber, fluororubber, and the like. The adhesive sealing material (e.g., the second sealing material) may include, but is not limited to: silicone gel, epoxy resin, acrylate, and the like. Advantageously, the first sealing material may be a solid sealing material and the second sealing material may be a sealant.

Among sealing materials available in the market at present, the sealing materials which can have two properties of high temperature resistance and strong binding force are few and are expensive. Often, the high temperature resistant sealant is not sufficiently adhesive to hold the two together when applied between the panel and the side guards; many sealing materials (sealants) with strong adhesion are not resistant to high temperatures and fail at high temperatures to lose the ability to adhere and seal. In view of the above, in the heat exchange tube according to the embodiment of the utility model, by employing the high-temperature-resistant sealing material and the sealing material which is not high-temperature-resistant but strong in adhesive force in combination in the different sealing regions, it is allowed to separate the high-temperature-resistant sealing material from the high-temperature-resistant sealing material to protect the latter, thereby better exerting the advantage of strong adhesive force of the latter, and realizing both high-temperature-resistant and strong-adhesive-force connection and sealing between the panel and the side shield as a whole.

Next, a heat exchange tube according to various embodiments of the present utility model will be described with reference to fig. 4 to 9.

Fig. 4 is a partially enlarged schematic view of a heat exchange tube according to a first embodiment of the present utility model, in which a right side drawing (b) is enlarged to show a structure in which a side shield is sealingly connected to both upper and lower panels, and a left side drawing (a) is enlarged to show a structure in which an upper side abutment surface of the side shield is sealingly connected to an upper side panel, in a sectional view. As shown in fig. 4, in the heat exchange tube according to the first embodiment, 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 having micro grooves), and different sealing materials 21, 22 are applied side by side on the abutting surface 120A, forming two sealing regions m1, m2 each extending in the x-direction and arranged at different positions in the y-direction.

Similarly, fig. 5 shows a heat exchange tube according to a second embodiment of the present utility model in a partially enlarged view, in which a right side drawing (b) shows in enlarged form a structure in which a side barrier is sealingly connected to both upper and lower panels, and a left side drawing (a) shows in enlarged form a structure in which an upper side abutment surface of the side barrier is sealingly connected to an upper side panel. As shown in fig. 5, in the heat exchange tube according to the second embodiment, the abutting surface 120B of the partition structure 111 of the side baffle 100B is divided into two sealing surfaces 121, 122 corresponding to the sealing regions m1, m2, respectively, the sealing surface 121 is formed as a uniform surface (e.g., a flat surface or a surface having micro grooves), and the sealing surface 122 is formed with a seal groove 130. The seal material 21 is applied to the seal surface 121, the seal material 22 is applied to the seal surface 122, and the seal groove 130 is accommodated.

Although the seal groove 130 is shown in fig. 5 as being formed on the sealing surface 122 near the inner passage of the heat exchange tube, this is not limiting. In other examples, the seal groove 130 may be formed on the sealing surface 121 near the outside of the heat exchange tube as shown in fig. 5.

Fig. 6 is an enlarged partial schematic view of a heat exchange tube according to a third embodiment of the present utility model. As shown in fig. 6, in the heat exchange tube according to the third embodiment, the abutting surface 120C of the partitioning structure 111 of the side baffle 100C is divided into two sealing surfaces 121, 122 corresponding to the sealing areas m1, m2, respectively, and the sealing surfaces 121 and 122 are formed with sealing grooves 131 and 132, respectively, for accommodating the sealing material 21 and the sealing material 22, respectively.

Although the seal grooves shown in fig. 5 and 6 each have a rectangular cross section, this is not limiting. The seal groove may have a cross-sectional shape other than rectangular. For example, as shown in graphs (a) to (c) of fig. 7, the seal groove 130 may have a rectangular, semicircular, V-shaped cross-sectional shape. In addition, the seal groove may have any suitable cross-sectional shape, such as trapezoidal, U-shaped, etc. Advantageously, as shown in figures 7 (d) and (e), the seal groove may have a serrated or wavy bottom surface 130a. This may increase the contact area of the sealing material with the abutment surface, which may be advantageous for improving the sealing and/or adhesion.

Furthermore, although the two seal grooves on the same abutment surface shown in fig. 6 and 7 have the same structure (e.g., the same cross section), this is not limiting. In an advantageous example, the two sealing grooves on the same abutment surface may have mutually different structures, for example different cross-sectional shapes, different depths or different bottom structures. In some cases, this is advantageous to accommodate the characteristics of different sealing materials.

Fig. 8 is an enlarged partial schematic view of a heat exchange tube according to a fourth embodiment of the present utility model. In the heat exchange tube according to the fourth embodiment, three sealing areas m1, m2, m3 are formed between the panel 10a and the side barrier 100D. In the example shown in fig. 8, the abutment surface 120D is divided into three sealing surfaces 121, 122, 123 corresponding to the three sealing areas, respectively, on which sealing grooves are formed for accommodating the sealing materials 21, 22, 23, respectively. At least two of the sealing materials 21, 22, 23 are sealing materials different from each other. Preferably, the sealing material 22 located in the middle is different from the sealing materials 21 and 23. It should be appreciated that according to the present embodiment, the three seal grooves may have the same or different structures; furthermore, the three sealing surfaces are not limited to all forming a sealing groove, but one or two sealing surfaces may form a sealing groove, or none of the three sealing surfaces may form a sealing groove.

Fig. 9 is an enlarged partial schematic view of a heat exchange tube according to a fifth embodiment of the present utility model. In the heat exchange tube according to the fifth embodiment, the partition structure of the side barrier includes two or more sub-partition structures, and at least two sealing surfaces are located on different sub-partition structures. In the example shown in fig. 9, the partition structure 111 of the side dam 100E includes two sub-partition structures 111a and 111b, and the two sealing surfaces 121, 122 of the abutment surface 120E are located on the sub-partition structures 111a, 111b, respectively. As shown in fig. 9, seal grooves may be formed in the seal surfaces 121, 122, respectively, but are not limited thereto. For example, no seal groove may be formed on any of the sealing surfaces.

It should be understood that in the heat exchange tube according to the fifth embodiment, the number of sub-dividing structures included in one side barrier is not limited to two, but may be three or more, and that a single sub-dividing structure may have more than one sealing surface (e.g., two sealing surfaces) corresponding to more than one sealing area thereon.

It was described above in connection with fig. 4 to 9 that heat exchange tubes according to various embodiments may have sealing areas of various numbers and configurations. These sealing zones can be used for applying different sealing materials. In the utility model, the sealing materials of different sealing areas are optimally arranged to obtain different layouts in consideration of the influence of the temperature and corrosiveness of the gas. Next, different layouts formed according to the difference in sealing materials in the sealing region will be described with reference to fig. 10.

As already described above with reference to fig. 1, the heat exchanger 1 according to the present utility model is used for heat exchange between a first gas and a second gas, and a gas of the two gases having a higher temperature is hereinafter referred to as "high temperature gas", and a gas having a lower temperature is hereinafter referred to as "low temperature gas".

In fig. 10, a graph (a) shows that a sealing area close to the high-temperature gas in the y direction in two sealing areas of the heat exchange tube is a high-temperature resistant sealing area 31, the other sealing area is a bonding sealing area 32, and the upper limit of the working temperature of the sealing material filled in the high-temperature resistant sealing area 31 is higher than that of the sealing material filled in the bonding sealing area 32.

Preferably, the adhesion of the sealing material filled in the adhesion sealing region 32 is higher than the adhesion of the sealing material filled in the high temperature resistant sealing region 31.

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 adhesive sealing region 32.

The graph (b) in fig. 10 shows that one of the three seal areas of the heat exchange tube closest to the high temperature gas in the y direction is a high temperature resistant seal area 31, one of the seal areas closest to the low temperature gas is a bonding seal area 32, and the seal area between the high temperature resistant seal area 31 and the bonding seal area 32 is a corrosion resistant seal area 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 adhesive sealing region 32.

Figure 10 (c) shows that the three sealing zones of the heat exchange tube include one adhesive sealing zone 32 and two high temperature resistant sealing zones 31 located on both sides of the adhesive sealing zone 32. Preferably, the upper limit of the working temperature to which the sealing material filled in the high temperature resistant sealing region 31 is applied is higher than the upper limit of the working temperature to which the sealing material filled in the adhesive sealing region 32 is applied, and the adhesiveness of the sealing material filled in the adhesive sealing region 32 is higher than the adhesiveness of the sealing material filled in the high temperature resistant sealing region 31. The heat exchange tube constructed in this way can be flexibly adapted to different situations where 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 adhesive sealing region 32.

The graph (d) in fig. 10 shows that the sealing region closest to the high temperature gas in the y direction among the three sealing regions of the heat exchange tube is a first high temperature resistant sealing region 31A, the sealing region closest to the low temperature gas is a bonding sealing region 32, and the middle sealing region is a second high temperature resistant sealing region 31B, wherein the corrosion resistance of the sealing material filled in the first high temperature resistant sealing region 31A is higher than the corrosion resistance of the sealing material filled in the second high temperature resistant sealing region 31B. In the case where the price of the sealing material that is both high temperature resistant and corrosion resistant is higher than that of the sealing material that is high temperature resistant and corrosion resistant, the layout of the sealing region in this example is advantageous in reducing the manufacturing costs of the heat exchange tube and the heat exchanger.

Further, as shown, the width of each seal area in the y-direction may be equal or unequal, depending on the particular application. For example, in some cases, the adhesive seal area 32 may have a greater width to provide adequate adhesion.

Referring back to fig. 2-8, it can be seen that the side dams 100 and the various examples 100A-100E thereof can include, in addition to the dividing structure 111, a rail structure 112, the rail structure 112 being integrally formed or otherwise secured with the dividing structure 111 and located on the opposite side of the inner passages 10b of the heat exchange tube relative to the dividing structure 111. The rail structure 112 has a larger dimension in the z-direction perpendicular to the panel 10a relative to the partition structure 111 so as to abut against the edge of the panel 10 a. In the example shown in fig. 2-8, the rail structure 112 is disposed over the entire length of the side guards in the x-direction.

Preferably, as shown in fig. 2-6, 7 and 8, in the z-direction perpendicular to the panels 10a, the outermost edges of the rail structures 112 are flush with the two panels 10a, and the side of the rail structures 112 opposite the dividing structure 111 has an arcuate profile in a cross section perpendicular to the x-direction. Thus, the heat exchange tube is matched and sealed with the mounting through holes on the two sealing plates of the heat exchanger shell.

In heat exchange tubes according to other embodiments of the present utility model, the side dams may not include a rail structure or include a rail structure of a different structure. FIG. 11 illustrates a number of variations of side dams that may be used with heat exchange tubes according to embodiments of the utility model and seals that may be used with the side dams.

The side guards 100' shown in figure 11 (a) do not include a rail structure. Fig. 12 shows a heat exchange tube 10 'incorporating side dams 100'.

In the side barrier 100 "shown in the graph (b) of fig. 11, the rail structures 112 are provided at both ends of the side barrier 100" in the x-direction. Fig. 13 shows a heat exchange tube 10 "incorporating a side dam 100".

Similarly, it is preferable that the outermost edges of the rail structures 112 are flush with the two panels 10a in the z-direction perpendicular to the panels 10a, and that the side of the rail structures 112 opposite the partition structure 111 have an arcuate profile in a cross-section perpendicular to the x-direction. Thus, the heat exchange tube is matched and sealed with the mounting through holes on the two sealing plates of the heat exchanger shell.

In the side barrier 100 '"shown in the graph (c) of fig. 11, the rail structure 112 is provided in the middle of the side barrier 100'" in the x direction.

Figure 11 (d) shows a seal 200 that may be used with, for example, the two ends of a side dam. As shown, the body of the seal 200 is a rail portion 211, which rail portion 211 may have the same or similar structure as the rail portion 112 of the side dam 100 "to mate and seal with mounting holes in the seal plate. Preferably, a slightly protruding engagement portion 212 may also be formed in the middle of the rail portion 211 for engagement between the two panels to better position the seal 200 relative to the panels. Fig. 14 shows a heat exchange tube 10 '"with seals 200 fitted to both ends of the side dams 100'".

The foregoing description is only of the preferred embodiments of the present application and is presented as a description of the principles of the technology being utilized. It will be appreciated by persons skilled in the art that the scope of the utility model referred to in this application is not limited to the specific combinations of features described above, but it is intended to cover other embodiments in which any combination of features described above or equivalents thereof is possible without departing from the spirit of the utility model. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.

Claims (28)

1. A heat exchange tube is characterized by comprising two panels opposite to each other and two side baffles opposite to each other, wherein the panels and the side baffles enclose an inner channel of the heat exchange tube,

at least one panel is discrete and sealingly connected to at least one side dam, the at least one side dam including a partition extending in a first direction, the partition having an abutment surface abutting and connected to the at least one panel in a direction perpendicular to the panels; and is also provided with

The heat exchange tube further comprises at least two different sealing materials applied on the same abutment surface, the at least two different sealing materials being arranged in 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.

2. The heat exchange tube of claim 1, wherein the two panels and the two side dams are each separated from each other, and the partition structure of each side dam has two abutment surfaces opposite to each other for abutment and connection with one of the two panels, respectively, in a direction perpendicular to the panels.

3. The heat exchange tube of claim 1, wherein 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.

4. A heat exchange tube according to claim 3, wherein an upper limit of an operating temperature to which the first sealing material is applied is higher than an upper limit of an operating temperature to which the second sealing material is applied.

5. The heat exchange tube of claim 4, wherein an upper limit of an operating temperature to which the first sealing material is applied is 150 ℃ or higher; and the upper limit of the working temperature to which the second sealing material is applied is lower than 150 ℃.

6. The heat exchange tube of claim 5, wherein an upper limit of an operating temperature to which the first sealing material is applied is 200 ℃ or higher.

7. The heat exchange tube of claim 5, wherein an upper limit of an operating temperature to which the second sealing material is applied is 100 ℃ or less.

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

9. The heat exchange tube of claim 4, wherein the at least two sealing zones further comprise a third sealing zone filled with a first sealing material, and wherein the third sealing zone and the first sealing zone are located on opposite sides of the second sealing zone from each other.

10. A heat exchange tube according to any one of claims 3 to 9, wherein the first sealing material is a non-adhesive sealing material and the second sealing material is an adhesive sealing material.

11. The heat exchange tube of any one of claims 3-9, wherein the first sealing material is a solid sealing material and the second sealing material is a sealant.

12. The heat exchange tube according to any one of claims 1 to 9, wherein the at least one abutment surface is divided into at least two sealing surfaces corresponding to the at least two sealing areas, 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.

13. The heat exchange tube of claim 12, wherein the seal groove extends in the first direction and has a rectangular, trapezoidal, semi-circular, U-shaped, or V-shaped cross-sectional shape perpendicular to the first direction.

14. The heat exchange tube of claim 12, wherein the seal groove has a serrated or wavy bottom surface.

15. The heat exchange tube of claim 12, wherein the separation structure of the at least one side dam comprises more than two sub-separation structures and the at least two sealing surfaces are located on different sub-separation structures.

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

17. The heat exchange tube of claim 15, wherein the at least two sealing surfaces comprise a first sealing surface and a second sealing surface, and wherein the first sealing surface has a first sealing groove formed therein and the second sealing surface has a second sealing groove formed therein.

18. The heat exchange tube of claim 16, wherein the first seal groove and the second seal groove have different cross-sectional shapes.

19. The heat exchange tube of any one of claims 1-9, 13-18, wherein at least one of the side dams further comprises a rail structure integrally formed with or secured together with the dividing structure, the rail structure being disposed on at least a portion of the side dams in the first direction and on opposite sides of the inner passages of the heat exchange tube relative to the dividing structure, wherein the rail structure has a larger dimension relative to the dividing structure in a direction perpendicular to the panels so as to abut against edges of the panels.

20. The heat exchange tube of claim 19, wherein an outermost edge of the rail structure is flush with the two panels in a direction perpendicular to the panels, and a side of the rail structure opposite the separator structure has an arcuate profile in a cross-section perpendicular to the first direction.

21. The heat exchange tube of claim 20, wherein the rail structures are disposed on both ends of the side dams in the first direction.

22. A heat exchanger comprising a housing having an interior space and a plurality of heat exchange tubes supported on and passing through the interior space of the housing, wherein at least one of the heat exchange tubes is a heat exchange tube as claimed in any one of claims 1 to 21.

23. The heat exchanger of claim 22, wherein the heat exchanger is a gas-to-gas heat exchanger for a first gas and a second gas, a sealing zone of the at least two sealing zones of the heat exchange tube closest to a higher temperature of the first gas and the second gas in the second direction is a high temperature resistant sealing zone, at least one sealing zone of the other sealing zones is a bonding sealing zone, and an upper limit of an operating temperature to which a sealing material filled in the high temperature resistant sealing zone is applied is higher than an upper limit of an operating temperature to which a sealing material filled in the bonding sealing zone is applied.

24. The heat exchanger of claim 23, wherein the bonding seal region is filled with a sealing material having a higher adhesion than the sealing material in the high temperature resistant seal region.

25. The heat exchanger of claim 23 or 24, wherein 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 bonded sealing zone.

26. The heat exchanger of claim 23 or 24, wherein the at least two sealing zones of the heat exchange tube further comprise at least one corrosion resistant sealing zone between the high temperature resistant sealing zone and the bonded 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 bonded sealing zone.

27. The heat exchanger of claim 22, wherein the at least two sealing zones of the heat exchange tube include a bonded sealing zone and two refractory sealing zones on either side of the bonded sealing zone, wherein an upper limit of an operating temperature for the sealing material filled in the refractory sealing zone is higher than an upper limit of an operating temperature for the sealing material filled in the bonded sealing zone, and wherein the bonding property of the sealing material filled in the bonded sealing zone is higher than the bonding property of the sealing material filled in the refractory sealing zone.

28. The heat exchanger of claim 27, wherein 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 bonded sealing zone.

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