CN218673323U - Heat exchange tube and heat exchanger comprising same - Google Patents

Abstract

The application discloses heat exchange tube reaches heat exchanger including it. The heat exchange tube comprises mutually opposite panels and mutually opposite side baffles, and the panels and the side baffles are enclosed to form an inner channel; the heat exchange tube further comprises a sealing fixing piece which comprises a first fixing portion, a second fixing portion and a connecting portion connected between the first fixing portion and the second fixing portion, the first fixing portion and the second fixing portion are arranged on two sides of the side baffle respectively, and the connecting portion is located on the outer side of the end portion of the side baffle. Through setting up sealing fixed part, can prevent effectively that the side shield from sliding to the heat exchange tube inboard, avoided the destruction to the whole tubulose access structure of heat exchange tube effectively, also be favorable to protecting the seal structure between side shield and the panel simultaneously.

Description

Heat exchange tube and heat exchanger comprising same

Technical Field

The utility model relates to a gas-gas heat transfer technique especially relates to a heat exchanger and heat exchange tube that are used for gas-gas heat transfer.

Background

The flue gas waste heat recovery device or the flue gas cooling device needs to adopt a gas-gas heat exchanger to realize heat exchange between flue gas and air. Such gas-gas heat exchangers can be, for example, air preheaters and flue gas air coolers, depending on the application. In order to maximize energy recovery or obtain better cooling, it is generally desirable to have lower flue gas temperature and higher air temperature after heat exchange. However, when the temperature of the flue gas is reduced to be below the condensation dew point, acid dew is generated, corrosion is caused to the heat exchange pipe, and the service life of the heat exchanger is shortened.

To this end, a 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 of corrosion resistant material such as glass, ceramic, etc., in which a heat exchange panel and side dams surround and define an inner channel of the heat exchange tube in a flat shape, and are hermetically joined together by an adhesive. The heat exchange tube can overcome the corrosion problem of the heat exchange tube caused by flue gas condensation and is simple and convenient to manufacture. This technique is not without its drawbacks. Because the high temperature of flue gas leads to the binder to damage easily, the leakproofness of heat exchange tube is difficult to keep to can not isolate the inside and outside gaseous medium of heat exchange tube, cause medium leakage and scurry each other.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a heat exchange tube reaches heat exchanger including it to at least partly overcome not enough among the prior art.

According to one aspect of the present invention, there is provided a heat exchange tube comprising two panels opposed to each other and two side dams opposed to each other, the panels and the side dams enclosing an internal channel defining the heat exchange tube, wherein at least one side dam is separate from and sealingly joined to both panels, the at least one side dam having a strip-like structure extending in a first direction and having an upper abutment surface and a lower abutment surface for abutment against the two panels respectively in a direction perpendicular to the panels; and the heat exchange tube further comprises a sealing fixing member, the sealing fixing member comprises a first fixing portion, a second fixing portion and a connecting portion connected between the first fixing portion and the second fixing portion, wherein the sealing fixing member is arranged such that the first fixing portion and the second fixing portion are respectively located on both sides of the at least one side shield in a second direction parallel to the panels and perpendicular to the first direction, the first fixing portion abuts against edges of the two panels in the second direction, the second fixing portion is located between the two panels, and the connecting portion is located at one end of the at least one side shield along the outside of the first direction.

Preferably, the first fixing portion, the connecting portion, and the second fixing portion of the sealing fixture form a substantially U-shaped groove.

Preferably, the first fixing portion and the second fixing portion have a longitudinal shape extending in the first direction.

Preferably, the first fixing portion includes a crosspiece portion and an engaging portion protruding from the crosspiece portion toward the second fixing portion, and in a direction perpendicular to the panels, a width of the crosspiece portion is greater than an inner distance between the two panels, and a width of the engaging portion is smaller than the inner distance between the two panels and is located in a middle of the crosspiece portion.

Preferably, the crosspiece has an upper positioning surface and a lower positioning surface extending along the first direction and perpendicular to the second direction, respectively for abutting against the edges of the two panels.

Preferably, the fitting portion has an intermediate positioning surface perpendicular to the second direction for abutting against the at least one side shutter.

Preferably, the outermost edges of the crosspieces are flush with the two panels in a direction perpendicular to the panels, and the side of the crosspieces opposite to the jogged portion has an arcuate profile in a cross section perpendicular to the first direction.

Advantageously, the connecting portion has an elongated shape extending in the second direction.

Advantageously, the length of the second fixing portion is greater than the length of the first fixing portion.

In some embodiments, the sealing fixture further comprises an additional first fixing portion and an additional connecting portion connected between the additional first fixing portion and the second fixing portion, the additional first fixing portion and the additional connecting portion have substantially symmetrical structures with the first fixing portion and the connecting portion, and the additional first fixing portion and the second fixing portion are respectively located at both sides of the at least one side fence in the second direction, the additional first fixing portion abuts against edges of the two panels in the second direction, and the additional connecting portion is located at an outer side of the other end of the at least one side fence in the first direction.

In other embodiments, the sealing fixture further includes an additional second fixing portion and an additional connecting portion connected between the first fixing portion and the additional second fixing portion, the additional second fixing portion and the additional connecting portion have substantially symmetrical structures with the second fixing portion and the connecting portion, and the first fixing portion and the additional second fixing portion are respectively located at both sides of the at least one side dam in the second direction, the additional second fixing portion is located between the two panels, and the additional connecting portion is located at an outer side of the other end of the at least one side dam along the first direction.

Preferably, the distance between the first fixing portion and the second fixing portion in the second direction is substantially the same as the width of the at least one side guard in the second direction.

Advantageously, the connecting portion and at least one of the first and second fixing portions are fixed together by welding or screwing.

Advantageously, the sealing fixture is bonded to the panel and the at least one side dam by an adhesive.

Preferably, the face plate and the side barrier are made of at least one material of glass, ceramic, graphite, and silicon carbide, and the sealing fixture is made of a metal material.

According to another aspect of the present invention, there is also provided a heat exchanger, which includes a housing and a plurality of heat exchange tubes, the housing has an inner space, the plurality of heat exchange tubes are supported on the housing and pass through the inner space of the housing, and at least one of the heat exchange tubes is the heat exchange tube as described above.

Preferably, the heat exchanger is a gas-gas heat exchanger for a first gas and a second gas having a lower pressure with respect to the first gas, wherein a space between the heat exchange tube and the shell constitutes a flow passage of the first gas, and an inner passage of the heat exchange tube constitutes a flow passage of the second gas.

Preferably, the shell comprises two opposite sealing plates, a plurality of installation through holes are formed in each sealing plate, and two ends of at least one heat exchange tube are matched and hermetically connected with the installation through holes through the sealing fixing pieces.

According to the utility model discloses a still another aspect still provides a heat exchanger, and it includes casing and a plurality of heat exchange tube, the casing has an inner space, a plurality of heat exchange tube support are in on the casing and pass the inner space of casing, wherein:

the heat exchange tube comprises two panels opposite to each other and two side dams opposite to each other, the panels and the side dams enclosing an inner channel defining the heat exchange tube, wherein at least one side dam is separate from and sealingly bonded to the two panels, the at least one side dam has a strip-like structure extending in a first direction and has an upper abutment surface and a lower abutment surface for abutting against and connecting with the two panels, respectively, in a direction perpendicular to the panels; and is

The heat exchanger is a gas-gas heat exchanger for a first gas and a second gas having a lower pressure with respect to the first gas, wherein a space between the heat exchange tube and the shell constitutes a flow channel of the first gas, and an inner channel of the heat exchange tube constitutes a flow channel of the second gas.

According to the utility model discloses heat exchanger, the inside passage of heat exchange tube constitutes low-pressure gas's flow channel, and the space between heat exchange tube and the casing constitutes high-pressure gas's flow channel, can show the manufacturing requirement that reduces the heat exchange tube, the risk of heat exchange tube seal failure in the greatly reduced heat exchanger working process simultaneously.

According to the utility model discloses heat exchange tube has set up sealing and fixing spare in the heat exchange tube, can prevent effectively that the side shield from sliding to the heat exchange tube inboard, has avoided the destruction to the whole tubular channel structure of heat exchange tube effectively, also is favorable to protecting the seal structure between side shield and the panel simultaneously.

Drawings

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

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

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

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

FIG. 4 is a perspective view of a seal retainer in the heat exchange tube of FIG. 3;

FIG. 5 is an enlarged view of a portion of the heat exchanger of FIG. 1 showing the mating of the heat exchange tubes with the mounting through holes in the seal plate;

figures 6, 7 and 8 show different examples of sealing fixtures that may be used with heat exchange tubes in accordance with embodiments of the present invention;

fig. 9 is a perspective view of another example of a heat exchange tube according to an embodiment of the present invention, with an upper side panel of the heat exchange tube removed to expose an internal construction;

FIG. 10 is a perspective view of a seal retainer in the heat exchange tube of FIG. 9;

fig. 11 is a perspective view of a sealing fixture that may be used with other examples of heat exchange tubes according to embodiments of the present invention;

fig. 12 is a gas heat exchange method using a heat exchanger according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. For convenience of description, only portions related to the invention are shown in the drawings. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

Fig. 1 is a perspective view of an example of a heat exchanger according to an embodiment of the present invention. As shown in fig. 1, the heat exchanger 1 includes a case 10 and a plurality of heat exchange tubes 100, wherein the case 10 is formed to have an inner space, and the plurality of heat exchange tubes 100 are supported on the case 10 and pass through the inner space of the case 10. Specifically, as shown in fig. 1, the housing 10 may include two sealing plates 11 disposed opposite to each other, the sealing plates 11 having a plurality of mounting through-holes 11a formed thereon, respectively, and both ends of the heat exchange pipe 100 passing through the mounting through-holes 11a to be fitted and hermetically connected with the mounting through-holes 11 a.

Fig. 2 shows an example of a heat exchange tube 100 that may be used in the heat exchanger 1 shown in fig. 1. As shown in fig. 2, the heat exchange tube 100 includes two panels 110 disposed opposite to each other and two side guards 120 disposed opposite to each other, and the panels 110 and the side guards 120 collectively enclose an inner channel defining the heat exchange tube 100. Preferably, the panels 110 and the side baffles 120 in the heat exchange tube 100 are made of corrosion-resistant materials such as glass, ceramic, graphite or silicon carbide, so that the corrosion resistance of the heat exchange tube and the heat exchanger is improved, and the heat exchange efficiency is improved.

In the example shown in fig. 2, the two panels 110 and the two side guards 120 are each discrete from one another. However, it should be understood that the present invention is not limited to the above. For example, one of the side guards 120 may be continuous or fixedly attached to the upper and lower panels 110. This can be achieved, for example, by folding a glass sheet in half while it is in a hot-melt state to form a folded structure having a "U" shape in cross section. Alternatively, one of the side guards 120 may be material continuous or fixedly attached to one of the panels 110. This can be achieved by, for example, bending or welding.

The structure of the heat exchange tube 100 is beneficial to processing of materials such as glass, ceramics, graphite and silicon carbide which are corrosion-resistant but have poor mechanical processing performance, and is convenient for manufacturing the heat exchange tube.

Although not shown, the discrete components of the heat exchange tube 100 may be sealed therebetween by a sealant or other sealing material.

Referring back to fig. 1, according to the preferred embodiment of the present invention, the heat exchanger 1 is configured as: the inner channel of the heat exchange pipe 100 constitutes a flow channel of low pressure gas, and the space between the heat exchange pipe 100 and the case 10 constitutes a flow channel of high pressure gas. Here, "low-pressure gas" and "high-pressure gas" are gases both of which have relatively low gas pressure or higher gas pressure. Thus, according to the embodiment of the present invention, when the heat exchanger 1 operates, low-pressure gas flows through the inner channel of the heat exchange tube 100, and high-pressure gas flows through the space between the heat exchange tube 100 and the housing 10, which results in pressure difference between the inside and the outside of the heat exchange tube 100.

As shown in fig. 2, in the above preferred implementation, the heat exchange tube 100 is subjected to an inwardly-pressing force by the pressure difference between the high-pressure gas and the low-pressure gas, and particularly, the two panels 110 are tightly pressed toward each other by the pressure difference, thereby compressing the gap between the panels 110 and the side barrier 120, which are separated from each other, in the heat exchange tube 100. The pressing action can keep the panel 110 of the heat exchange tube 100 and the side baffle 120 enclosing together to form a firmer tube body structure, and is favorable for forming and keeping a good sealing state of the heat exchange tube 100 and effectively isolating gas media inside and outside the heat exchange tube.

In this case, the panels of the heat exchange tubes and the side dams can be fixedly connected to each other without using an adhesive having particularly strong adhesion, or even without using an adhesive. Here, the "adhesive having particularly strong adhesion" refers to an adhesive having adhesion required in a conventional heat exchanger for maintaining the interconnection and sealing between the face plate and the side dam of the heat exchange tube, for example, in the case of a conventional tube-type heating furnace air preheater, for example, in the case of a heat exchange tube having a face plate width of 400 mm and a side dam width of 20 mm, the adhesive provides an adhesive strength between the face plate and the side dam of at least 20000Pa or more to make it possible to seal the face plate and the side dam, and such adhesion needs to be maintained for a long period of time in an operating state of the heat exchanger (for example, around 150 ℃, or even higher). In the above preferred heat exchanger according to an embodiment of the present invention, the adhesive used in the heat exchange tube may provide a certain adhesive force (approximately the adhesive force required to overcome the self-weight of the material) for installation and transportation of the heat exchange tube itself, for example, only at normal temperature, and may have no adhesive force in an operating state (e.g., around 150 ℃). For example, still taking the heat exchange tube with the panel width of 400 mm and the side baffle width of 20 mm as an example, the material is glass (the panel thickness is 3.2 mm, the side baffle thickness is 10 mm, and the glass density is 2.23g/cm ³ ) The adhesive force required to overcome the self-weight of the material at normal temperature is only about 1000 Pa.

In addition, the sealing between the panel of the heat exchange tube and the side baffle can be realized by other sealing materials which can provide airtight sealing under the condition of compaction, such as carbon fiber packing, polytetrafluoroethylene sealing tape, silicon rubber sealing tape and the like.

In summary, it can be seen that according to the heat exchanger of the preferred embodiment of the present invention, the inner channel of the heat exchange tube constitutes the flow channel of low-pressure gas, and the space between the heat exchange tube and the housing constitutes the flow channel of high-pressure gas, which can significantly reduce the manufacturing requirement of the heat exchange tube, and simultaneously greatly reduce the risk of the sealing failure of the heat exchange tube in the working process of the heat exchanger.

Next, a heat exchange pipe according to a preferred embodiment of the present invention will be described with reference to fig. 2 and 3. Fig. 2 shows an example of the heat exchange pipe 100, and fig. 3 shows a portion of the heat exchange pipe 100 shown in fig. 2, in which an upper side panel 110 of the heat exchange pipe 100 is removed to expose an inner construction.

As shown more clearly in fig. 3, the two side dams 120 of the heat exchange pipe 100 each have a strip-like structure extending in the x direction, and have upper and lower abutment surfaces, which abut the upper and lower panels 110, respectively, in a direction perpendicular to the panels 110 (the z direction shown in fig. 3).

According to the preferred embodiment of the present invention, as shown in fig. 3, the heat exchange pipe 100 further includes a sealing fixture 130, and the sealing fixture 130 includes a first fixing portion 131, a second fixing portion 132, and a connecting portion 133 connected between the first fixing portion 131 and the second fixing portion 132. In the example shown in fig. 2 and 3, a sealing fixture 130 is provided on each end of the two side guards 120 such that a first fixing portion 131 and a second fixing portion 132 are located on both sides of the side guards 120 in the y direction parallel to the panel 110 and perpendicular to the x direction, respectively. Specifically, as shown in fig. 3, the first fixing portion 131 abuts against edges of the two panels 110 in the y-direction, the second fixing portion 132 is located between the two panels 110, and the connecting portion 133 is located outside an end portion of the side fence 120.

The above-described preferred construction of the heat exchange tube including the sealing fixture is mainly in view of: in the case where the heat exchanger is constructed such that the inner passage of the heat exchange tube constitutes a flow passage for low-pressure gas and the space between the heat exchange tube and the shell constitutes a flow passage for high-pressure gas, the side dams are subjected to a pressing force against the inside of the heat exchange tube under the action of a pressure difference between the inside and the outside of the heat exchange tube, thereby causing a movement or tendency of movement of inward slippage between the two panels, which could affect or even destroy the tubular passage of the heat exchange tube, and even the tendency of movement of the side dams to slip could affect or even destroy the sealing structure between the side dams and the panels.

In view of the above, as described above with reference to fig. 3, according to the preferred embodiment of the present invention, the sealing fixture 130 is provided in the heat exchange pipe 100, and the first fixing portion 131 of the sealing fixture 130 is positioned with respect to the panel edge by abutting against the edge of the panel 110 in the y direction; the second fixing portion 132 is positioned relative to the first fixing portion 131 through the connecting portion 133, and the second fixing portion 132 is positioned on the inner side of the heat exchange tube relative to the side baffle 120, so that the second fixing portion 132 can effectively prevent the side baffle 120 from sliding towards the inner side of the heat exchange tube, effectively avoid the damage of the internal and external pressure difference to the whole tubular channel structure of the heat exchange tube, and is also beneficial to protecting the sealing structure between the side baffle and the panel.

In addition, the seal holder 130 of fig. 2 and 3 is constructed and arranged in a manner that is particularly advantageous for assembly within the heat exchange tube 100. In some cases, the sealing fixture 130 may be snapped onto the end of the side dam 120 in advance before capping the upper side panel, as shown in fig. 3. And more advantageously, the heat exchange pipe according to an embodiment of the present invention allows the installation and removal of the sealing fixture 130 by inserting or pulling out the sealing fixture 130 from both ends of the side dam 120 after the panel and the side dam have been assembled together. This is particularly advantageous for servicing the heat exchanger, since the above-described mounting and dismounting process can be carried out without the heat exchange tubes having to be removed from the housing of the heat exchanger.

Preferably, the panel 110 and the side barrier 120 are made of at least one material selected from glass, ceramic, graphite, and silicon carbide, and the sealing fixture 130 is made of a metal material. The metal material has good machining performance and is easy to manufacture the sealing fixing piece; moreover, the toughness of the metal material is good, so that the stress generated at the two ends of the connecting portion 133 in the operating state does not easily cause the failure of the sealing fixing member. Although the metallic material is deficient in corrosion resistance, as discussed above, according to the present invention, the seal holder in the above-described embodiment is easy to mount and dismount, so that even if the seal holder fails due to corrosion, it can be replaced conveniently and promptly, and the influence on the operation of the heat exchanger is small.

Advantageously, the inner spacing of the first and second fixing portions 131 and 132 in the y direction is substantially the same as the width of the corresponding side guard 120 in the y direction.

Advantageously, the sealing fixture 130 may be bonded to the panel 110 and the side dam 120 by an adhesive.

In addition, as shown in fig. 2 and 3, the heat exchange pipe 100 may further include an intermediate partition 140, which may be used to provide intermediate support for the panel 110; as a supplement, it may also be used to divide the inner channel of the heat exchange tube 100 into different channels.

Fig. 4 is a perspective view of the sealing fixture 130 in the heat exchange pipe 100 shown in fig. 3. In the example shown in fig. 4, the first fixing portion 131, the connecting portion 133, and the second fixing portion 132 of the sealing fixture 130 form a substantially U-shaped recess. Advantageously, the first fixing portion 131 and the second fixing portion 132 have a longitudinal shape extending in the x direction.

Preferably, as shown in fig. 4, the first fixing portion 131 includes a rail portion 131a and a fitting portion 131b protruding from the rail portion 131a toward the second fixing portion 132, wherein a width of the rail portion 131a is greater than an inner interval of the two panels 110 in a z direction perpendicular to the panels 110 so as to abut against edges of the two panels 110 in a y direction; the fitting portion 131b has a width smaller than an inner interval of the two panels 110 and is located at a middle portion of the rail portion 131a so as to be fitted between the two panels 110, thereby increasing the installation stability of the sealing fixture 130.

As shown in fig. 4, preferably, the rail 131a may have an upper positioning surface p1 and a lower positioning surface p2 extending in the x direction and perpendicular to the y direction, respectively for abutting against edges of the two panels 110. The fitting portion 131b may have an intermediate positioning surface p3 perpendicular to the y direction for abutting against the side fence 120.

In the example shown in fig. 4, the connection portion 133 has a lengthwise shape extending in the y direction. However, the connecting portion 133 is not limited to such a longitudinal shape, and may be formed in an arc-shaped tab shape, for example, to have both a function of connecting the first fixing portion 131 and the second fixing portion 132 and a function of holding a handle of the sealing fastener 130 at the time of attachment or detachment.

Fig. 5 is a partially enlarged view of the heat exchanger 1 shown in fig. 1, and as shown in the partially enlarged view, the end of the heat exchange pipe 100 may be fitted with the installation through-hole 11a through the sealing fixture 130. Preferably, as shown in fig. 4, in the z-direction perpendicular to the panels 110, the outermost edges of the rails 131a are flush with both panels 110, and the side of the rails 131a opposite to the fitting portion 131b has an arc-shaped profile in a cross section perpendicular to the x-direction. Thus, the sealing fixture 130 forms a smooth and even contour in the cross-section of the heat exchange pipe together with the panel 110, facilitating the fitting and sealing connection with the mounting through-hole 11 a.

The seal holder 130 shown in fig. 4 is an integrally formed member, however, this is not required. For example, fig. 6 and 7 show two different examples of the sealing fixture, i.e., the sealing fixtures 130' and 130", in which the connecting portion 133 is integrally formed with the second fixing portion 132 and fixed together with the first fixing portion 131 by a screw s. In other examples, the components may be secured together by welding. In other examples, the connecting portion may be integrally formed with the first fixing portion and then fixedly connected or detachably connected with the second fixing portion.

Furthermore, although the first and second fixing portions have substantially the same length in the sealing fixture shown in fig. 4, 6, and 7, this is not necessary. In other examples, such as the sealing fixture 130"' shown in fig. 8, the length of the second fixing portion 132 is greater than the length of the first fixing portion 131. This facilitates the second fixing portion 132 to better prevent the sliding movement of the side guard 120.

The sealing fixture shown in fig. 6, 7 and 8 may have the same or similar structure as the sealing fixture shown in fig. 4 in other respects not described above, and will not be described again.

Next, another example of a heat exchange tube and a sealing fixture therein according to an embodiment of the present invention will be described with reference to fig. 9 to 11.

Fig. 9 is a perspective view of a heat exchange tube 200 according to an embodiment of the present invention, wherein an upper side panel of the heat exchange tube 200 is removed to expose an inner structure. Fig. 10 is a perspective view of the sealing fixture 230 in the heat exchange pipe 200.

The heat exchange tube 200 of fig. 9 has substantially the same structure as the heat exchange tube 100 of fig. 2 and 3, and specifically, the heat exchange tube 200 includes two panels 210 disposed opposite to each other and two side dams 220 disposed opposite to each other, and the panels 210 and the side dams 220 together enclose an inner channel defining the heat exchange tube 200.

The heat exchange pipe 200 further includes a sealing fixture 230, as shown in fig. 9 and 10, the sealing fixture 230 includes a first fixing portion 231, a second fixing portion 232, and a connecting portion 233 connected between the first fixing portion 231 and the second fixing portion 232; the seal fixture 230 further includes an additional first fixing portion 231A and an additional connecting portion 233A connected between the additional first fixing portion 231A and the second fixing portion 232, the additional first fixing portion 231A and the additional connecting portion 233A having substantially symmetrical structures with the first fixing portion 231 and the connecting portion 233. As shown in fig. 9, the sealing and fixing member 230 is disposed such that the first fixing portion 231, the additional first fixing portion 231A, and the second fixing portion 232 are respectively located at both sides of the side guard 220 in the y direction, wherein the first fixing portion 231, the additional first fixing portion 231A abut against edges of the two panels 210 in the y direction, the second fixing portion 232 is located between the two panels 210, and the connecting portion 233, the additional connecting portion 233A are located at outer sides of respective ends of the side guard 220 in the x direction.

Figure 11 illustrates another example of a sealing fixture that may be used with a heat exchange tube according to an embodiment of the present invention. The sealing fixture 330 shown in fig. 11 has a similar structure to the sealing fixture 230 shown in fig. 10, except that both ends of a single elongated second fixing portion 232 in the sealing fixture 230 are connected to the first fixing portion 231 and the additional first fixing portion 231A through a connecting portion 233 and an additional connecting portion 233A, respectively; and both ends of the single elongated first fixing portion 331 in the sealing fixture 330 are connected to the second fixing portion 332 and the additional second fixing portion 332A through the coupling portion 333 and the additional coupling portion 333A, respectively, which have substantially symmetrical structures with the second fixing portion and the coupling portion.

Although the heat exchange tube assembled with the sealing fixture 330 is not shown, it will be understood by those skilled in the art based on the above description that the sealing fixture 330 is provided in the heat exchange tube such that the first fixing portion 331 abuts against the edges of the two panels in the y-direction, the second fixing portion 332, the additional second fixing portion 332A are located between the two panels, and the connecting portion 333, the additional connecting portion 333A are located outside the respective ends of the side panels in the x-direction, and the second fixing portion 332, the additional second fixing portion 332A are located on both sides of the corresponding side panel in the y-direction, respectively.

The seal fixtures shown in fig. 10 and 11 may be selected for use depending on the corrosiveness of the gaseous medium inside and outside the heat exchange tube. For example, if the gas medium outside the heat exchange tube is corrosive and the gas medium inside is clean, the seal holder 230 shown in fig. 10 may be selected; instead, the sealing fixture 330 shown in FIG. 11 may be selected.

The sealing fixture shown in fig. 10 and 11 may have the same or similar structure as the sealing fixture shown in fig. 4 in other respects not described above, and will not be described again.

Finally, a method for gas heat exchange by using the heat exchanger according to the embodiment of the utility model is introduced. Fig. 12 shows a flow chart of the method M10. As shown in fig. 12, based on the heat exchanger 1 according to the embodiment of the present invention as described above, the gas heat exchange method M10 includes:

s11: feeding a first gas into the interior space of the shell to flow between the heat exchange tubes and the shell; and

s12: a second gas having a lower pressure relative to the first gas is fed into the heat exchange tube to flow therethrough from the inner channel of the heat exchange tube.

Method M10 has two implications: 1. the method requires a first gas with relatively high gas pressure as a shell pass heat exchange medium, and a second gas with relatively low gas pressure as a tube pass heat exchange medium; 2. at the beginning of the heat exchange starting, a shell-side heat exchange medium is firstly sent into a heat exchanger. The technical effects with respect to the above first aspect have been elaborated upon when describing the heat exchanger 1 according to the preferred embodiment of the present invention; the second aspect described above is still significant from the viewpoint of the method of operating the apparatus because the shell-side heat exchange medium is first fed into the heat exchanger shell, which is advantageous in that the heat exchange tube of tubular structure formed by the panel and the side dams is in a good sealed state, and gas leakage inside and outside the heat exchange tube is effectively prevented when the shell-side heat exchange medium is subsequently received.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (21)

1. A heat exchange tube comprising two panels opposed to each other and two side dams opposed to each other, the panels and the side dams enclosing an interior channel defining the heat exchange tube, wherein,

at least one side baffle is separated and combined with the two panels in a sealing way, the at least one side baffle is provided with a strip-shaped structure extending along a first direction and is provided with an upper abutting surface and a lower abutting surface which are used for respectively abutting against the two panels along a direction vertical to the panels; and is

The heat exchange tube further comprises a sealing fixing piece, the sealing fixing piece comprises a first fixing portion, a second fixing portion and a connecting portion connected between the first fixing portion and the second fixing portion, wherein the sealing fixing piece is arranged so that the first fixing portion and the second fixing portion are located on two sides of the at least one side baffle respectively in a second direction parallel to the panels and perpendicular to the first direction, the first fixing portion abuts against the edges of the two panels in the second direction, the second fixing portion is located between the two panels, and the connecting portion is located at one end of the at least one side baffle and along the outer side of the first direction.

2. The heat exchange tube of claim 1, wherein the first fixing portion, the connecting portion and the second fixing portion of the seal holder form a substantially U-shaped groove.

3. The heat exchange tube of claim 1, wherein the first fixing portion and the second fixing portion have an elongated shape extending in the first direction.

4. The heat exchange tube of claim 2, wherein the first fixing portion and the second fixing portion have an elongated shape extending in the first direction.

5. The heat exchange tube according to claim 1, wherein the first fixing portion comprises a crosspiece portion and an engaging portion projecting from the crosspiece portion toward the second fixing portion,

in the direction perpendicular to the panels, the width of the crosspiece is greater than the inner distance between the two panels, and the width of the tabling part is less than the inner distance between the two panels and is positioned in the middle of the crosspiece.

6. The heat exchange tube according to claim 2, wherein the first fixing portion comprises a crosspiece portion and an engaging portion projecting from the crosspiece portion toward the second fixing portion,

in the direction perpendicular to the panels, the width of the crosspiece is greater than the inner distance between the two panels, and the width of the tabling part is less than the inner distance between the two panels and is positioned in the middle of the crosspiece.

7. The heat exchange tube of claim 5, wherein the crosspiece has upper and lower positioning surfaces extending in the first direction and perpendicular to the second direction for abutting against edges of the two panels, respectively.

8. The heat exchange tube of claim 5, wherein said engaging portion has an intermediate positioning surface perpendicular to said second direction for abutment with said at least one side dam.

9. The heat exchange tube of claim 5, wherein the outermost edges of the crosspieces are flush with the two panels in a direction perpendicular to the panels, and

the side of the crosspiece opposite the fitting portion has an arcuate profile in a cross section perpendicular to the first direction.

10. A heat exchange tube according to claim 3, wherein the connection portion has an elongated shape extending in the second direction.

11. The heat exchange tube of claim 3, wherein the length of the second fixing portion is greater than the length of the first fixing portion.

12. A heat exchange tube according to any one of claims 1 to 10, wherein the seal holder further comprises an additional first fixing portion and an additional connection portion connected between the additional first fixing portion and the second fixing portion, the additional first fixing portion and the additional connection portion have substantially symmetrical structures with the first fixing portion and the connection portion, and

the additional first fixing portion and the second fixing portion are respectively located on two sides of the at least one side baffle in the second direction, the additional first fixing portion abuts against edges of the two panels in the second direction, and the additional connecting portion is located on the outer side of the other end portion of the at least one side baffle in the first direction.

13. A heat exchange tube according to any one of claims 1 to 10, wherein the seal holder further comprises an additional second fixing portion and an additional connection portion connected between the first fixing portion and the additional second fixing portion, the additional second fixing portion and the additional connection portion have substantially symmetrical structures with the second fixing portion and the connection portion, and

the first fixing portion and the additional second fixing portion are respectively located on both sides of the at least one side fence in the second direction, the additional second fixing portion is located between the two panels, and the additional connecting portion is located outside the other end portion of the at least one side fence in the first direction.

14. The heat exchange tube according to any one of claims 1 to 11, wherein the pitch of the first fixing portion and the second fixing portion in the second direction is substantially the same as the width of the at least one side baffle in the second direction.

15. The heat exchange tube as recited in any one of claims 1 to 11, wherein the connection portion and at least one of the first fixing portion and the second fixing portion are fixed together by welding or screwing.

16. A heat exchange tube according to any one of claims 1 to 11, wherein the seal holder is bonded to the face sheet and the at least one side dam by an adhesive.

17. A heat exchange tube according to any one of claims 1 to 11, wherein the face plate and the side dam are made of at least one material selected from glass, ceramic, graphite, and silicon carbide, and the seal holder is made of a metallic material.

18. A heat exchanger comprising a shell having an interior space and a plurality of heat exchange tubes supported on and passing through the shell interior space, wherein at least one of the heat exchange tubes is a heat exchange tube as recited in any one of claims 1 to 17.

19. The heat exchanger as recited in claim 18, wherein the heat exchanger is a gas-gas heat exchanger for a first gas and a second gas having a lower pressure with respect to the first gas, wherein a space between the heat exchange tube and the shell constitutes a flow channel of the first gas, and an inner channel of the heat exchange tube constitutes a flow channel of the second gas.

20. The heat exchanger according to claim 18 or 19, wherein the housing includes two sealing plates disposed opposite to each other, the sealing plates having a plurality of mounting through-holes formed therein, respectively, and both ends of the at least one heat exchange pipe are fitted and sealingly connected to the mounting through-holes by the sealing fixing members.

21. A heat exchanger comprising a shell having an interior space and a plurality of heat exchange tubes supported on and passing through the shell interior space, wherein:

the heat exchange tube comprises two panels opposite to each other and two side dams opposite to each other, the panels and the side dams enclosing an inner channel defining the heat exchange tube, wherein at least one side dam is separate from and sealingly bonded to the two panels, the at least one side dam has a strip-like structure extending in a first direction and has an upper abutment surface and a lower abutment surface for abutting against and connecting with the two panels, respectively, in a direction perpendicular to the panels; and is

The heat exchanger is a gas-gas heat exchanger for a first gas and a second gas having a lower pressure with respect to the first gas, wherein a space between the heat exchange tube and the shell constitutes a flow channel of the first gas, and an inner channel of the heat exchange tube constitutes a flow channel of the second gas.

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