A tube-sheet multi-medium heat exchanger

Abstract

The present invention discloses a tube-sheet multi-media heat exchanger, comprising a plurality of heat exchange plates and a heat exchange tube group passing through the heat exchange plates, wherein the heat exchange tube group is used to accommodate a first heat exchange medium; the heat exchange plates are all provided with wavy concave-convex patterns, the edges of adjacent heat exchange plates are closed, and the space between the plates is used to accommodate other heat exchange mediums; the raised positions of adjacent heat exchange plates are close to each other, and the straight tube parts of the heat exchange tube group are all close to the raised positions passing through the heat exchange plates. By optimizing the structure of the heat exchange plates themselves, adjacent heat exchange plates have a position that can be fitted, so no internal medium flows through this position, so when the straight tube part of the heat exchange tube passes through this position, it is equivalent to passing through only one layer of plate parts, and there is no need to use a sealing ring or other structure to perform elastic sealing on this position, so that the sealing ring with poor heat resistance can be prevented from directly contacting the high-temperature medium passing through the heat exchange tube group, thereby solving the problem of rubber degradation at high temperature. When using such a relatively compact heat exchanger, the problem of temperature restriction performance of the heat exchange medium is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchangers, and more particularly to a tube-sheet type multi-media heat exchanger. Background Art

[0002] Currently, the more common heat exchangers include shell and tube, fin tube, tube sleeve, spiral plate, plate heat exchanger, etc. However, among these heat exchangers, there are very few structures that can achieve multi-stream heat exchange. Plate heat exchanger is one of them, but currently plate heat exchangers have the following defects.

[0003] Since the sealing gasket between the plates is mainly made of rubber, it is subjected to pressure and temperature during operation and is corroded by the working fluid. When the gasket is in a high-temperature working environment for a long time, it will deteriorate and cause failures such as gasket detachment and breakage. Due to the nature of the sealing gasket, the temperature of the working fluid between the heat exchange plates cannot be too high. The applicable environment and temperature upper limit of the plate heat exchanger are restricted by the sealing gasket.

[0004] With the development of industrial technology, more and more occasions require simultaneous heat exchange of multiple media, such as dual-source heat pumps, natural cooling systems, chemical processes, etc. The existing three-medium heat exchanger is not only complex in structure and cumbersome in manufacturing process, but also has a small heat exchange area. If only a general two-medium heat exchanger is used, it will cost a lot and take up a lot of space. If a plate heat exchanger is used, the upper limit of the temperature between the plates will be limited by the sealing gasket.

[0005] In summary, how to effectively solve the technical problem that the use of the currently commonly used multi-media heat exchangers is limited by the heat resistance of the sealing material and the design space process is an issue that the technical personnel in this field urgently need to solve. Summary of the invention

[0006] In view of this, an object of the present invention is to provide a tube sheet type multi-media heat exchanger, the structural design of which can effectively solve the technical problems that the use of currently commonly used multi-media heat exchangers is limited by the heat resistance of sealing materials and design space processes.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A tube-sheet multi-media heat exchanger comprises a plurality of heat exchange plates and a heat exchange tube group passing through the heat exchange plates, wherein the heat exchange tube group is used to accommodate a first heat exchange medium; the heat exchange plates are all provided with wavy concave-convex patterns, the edges of adjacent heat exchange plates are closed, and the spaces between the plates are used to accommodate other heat exchange mediums; the raised positions of adjacent heat exchange plates are close to each other, and the straight tube portions of the heat exchange tube group are all close to the raised positions passing through the heat exchange plates.

[0009] Preferably, in the above-mentioned tube-sheet type multi-media heat exchanger, the raised positions of the heat exchange plates are in the shape of circular platforms, and the raised positions of adjacent heat exchange plates are in surface contact with each other.

[0010] Preferably, in the above-mentioned tube-sheet type multi-media heat exchanger, the protruding positions of the heat exchange plates are all provided with mounting through holes, and the straight tube portions of the heat exchange tube group are interference fit with the mounting through holes.

[0011] Preferably, in the above-mentioned tube-sheet type multi-media heat exchanger, the heat exchange tube group is hydraulically expanded and connected to the raised position of the heat exchange plate.

[0012] Preferably, in the above-mentioned tube-sheet multi-media heat exchanger, corners of the heat exchange plate are provided with corner holes for passing other heat exchange media, and a communicating flow channel is provided between the corner holes and the wavy concave-convex patterns.

[0013] Preferably, in the above-mentioned tube-sheet type multi-media heat exchanger, a sealing ring is provided at the edge area between adjacent heat exchange plates for sealingly connecting adjacent heat exchange plates.

[0014] Preferably, in the above-mentioned tube-sheet multi-media heat exchanger, the tube-sheet multi-media heat exchanger further comprises a pressing device arranged on the side of the heat exchange plate, for pressing and fixing a plurality of adjacent heat exchange plates.

[0015] Preferably, in the above-mentioned tube-sheet multi-media heat exchanger, the tube-sheet multi-media heat exchanger further comprises a partition plate arranged on the side of the heat exchange plate for separating different heat exchange areas, and the straight tube section of the heat exchange tube group is fixedly connected to the partition plate by welding.

[0016] The tube-sheet multi-media heat exchanger provided by the present invention comprises a plurality of heat exchange plates and a heat exchange tube group passing through the heat exchange plates, wherein the heat exchange tube group is used to accommodate a first heat exchange medium; the heat exchange plates are all provided with wavy concave-convex patterns, the edges of adjacent heat exchange plates are closed, and the spaces between the plates are used to accommodate other heat exchange mediums; the raised positions of adjacent heat exchange plates are close to each other, and the straight tube portions of the heat exchange tube group are all close to the raised positions passing through the heat exchange plates. The tube-sheet multi-media heat exchanger provided by the present invention optimizes the matching design between the heat exchange plate and the heat exchange tube group. By optimizing the structure of the heat exchange plate itself, adjacent heat exchange plates are provided with a fitting position, so that no internal working fluid flows through this position. In this way, when the straight tube portion of the heat exchange tube passes through this position, it is equivalent to passing through only one layer of plate, and there is no need to use sealing rings and other structures to elastically seal this position. In this way, the sealing ring with poor heat resistance can be prevented from directly contacting the high-temperature working fluid passing through the heat exchange tube group, solving the problem of rubber degradation at high temperature. Therefore, when using this relatively compact tube-sheet heat exchanger, there is no need to consider the problem of excessively high temperature of the heat exchange working fluid, which is equivalent to solving the process complexity and space compactness problems of multi-media heat exchange equipment at the same time. In summary, the technical solution provided by the present invention effectively solves the technical problem that the use of commonly used multi-media heat exchangers is limited by the heat resistance of the sealing material and the design space process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of a partial interlaced structure of a tube-sheet type multi-medium heat exchanger provided in an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of the cross-sectional structure of a heat exchange plate of a tube-sheet type multi-media heat exchanger provided in an embodiment of the present invention;

[0020] Figure 3 A schematic diagram of the front structure of a tube-sheet multi-media heat exchanger provided in an embodiment of the present invention;

[0021] Figure 4 A schematic diagram of the combined structure of a tube-sheet multi-media heat exchanger provided in an embodiment of the present invention;

[0022] Figure 5 A schematic diagram of the combined structure of a tube-sheet multi-media heat exchanger provided in an embodiment of the present invention;

[0023] Figure 6A schematic diagram of the overall structure of a tube-sheet multi-media heat exchanger provided in an embodiment of the present invention.

[0024] The following are marked in the accompanying drawings:

[0025] Heat exchange tube group 1, heat exchange plate 2, protruding position 3, corner hole 4, flow channel 5, partition 6. DETAILED DESCRIPTION

[0026] The embodiment of the present invention discloses a tube-sheet type multi-media heat exchanger to solve the technical problem that the use of the commonly used multi-media heat exchanger is limited by the heat resistance of the sealing material and the design space process.

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 3 , Figure 1 A schematic diagram of a partial interlaced structure of a tube-sheet type multi-medium heat exchanger provided in an embodiment of the present invention; Figure 2 A schematic diagram of the cross-sectional structure of a heat exchange plate of a tube-sheet type multi-media heat exchanger provided in an embodiment of the present invention; Figure 3 A schematic diagram of the side structure of a tube-sheet multi-media heat exchanger provided in an embodiment of the present invention;

[0029] The tube-sheet multi-media heat exchanger provided by the present invention comprises a plurality of heat exchange plates 2 and a heat exchange tube group 1 passing through the heat exchange plates 2, wherein the heat exchange tube group 1 is used to accommodate a first heat exchange medium; the heat exchange plates 2 are all provided with wavy concave-convex patterns, the edges of adjacent heat exchange plates 2 are closed, and the spaces between the plates are used to accommodate other heat exchange mediums; the raised positions 3 of adjacent heat exchange plates 2 are in contact with each other, and the straight tube portions of the heat exchange tube group 1 are all in close contact with the raised positions 3 passing through the heat exchange plates 2.

[0030] It should be noted that the other heat exchange medium flowing between the heat exchange plates 2 can be one type, or two or more types, or even more types. The specific implementation method can be achieved through the flow channel setting on the plates and the coordination of the input and output positions of the medium between the plates.

[0031] The wave-shaped heat exchange plate 2 used has the characteristics of simple structure, convenient processing, and complex shape, which makes the working medium flowing between the plates form complex turbulence to enhance heat transfer. The heat exchange plate 2 not only serves as the fin of the straight tube but also plays the role of separating the flow channel process. The flow form of a single working medium is determined by the combination mode of the heat exchange plate 2. The combination mode of the heat exchange plate 2 has two forms: series connection and parallel connection. According to the combination of the heat exchange plate 2, two or more working mediums can be heat exchanged simultaneously.

[0032] Figure 3 The arrowed curve in the middle indicates the flow path of other heat exchange media between the heat exchange plates 2 in the theoretical process. In the actual process, each time the medium passes through a raised position 3 of the wavy pattern, it will flow along the ridge of the pattern to the raised position 3 of the next pattern on the left and right sides. Therefore, the actual flow path will form many branches so that the fluid fills the entire heat exchange plate 2, so that the medium and the heat exchange plate 2 can obtain good contact and heat exchange. At the same time, the branching of the medium flow path complicates the medium flow path, forming complex turbulence to enhance heat exchange.

[0033] In the heat exchanger, the high-temperature working medium that exceeds the upper temperature limit of the sealing gasket passes through the straight pipe channel, so that it is separated from the sealing gasket used to seal between the two heat exchange plates. On the one hand, the upper temperature limit of the working medium in the heat exchanger is increased, and on the other hand, the degradation failure of the sealing gasket due to temperature is reduced, thereby extending the service life of the heat exchanger. In the heat exchanger, since the first heat exchange working medium that undergoes phase change during the heat exchange process passes through the straight pipe channel, while the other heat exchange working medium flowing between the two heat exchange plates does not undergo phase change heat exchange, the problem of the heat exchange working medium being retained in the heat exchanger in the diversion channel between the two heat exchange plates during the heat exchange process, affecting the heat exchange, is solved.

[0034] This tube-sheet type multi-media heat exchanger optimizes the matching design between the heat exchange plate 2 and the heat exchange tube group 1. By optimizing the structure of the heat exchange plate 2 itself, there is a position where adjacent heat exchange plates 2 can fit together, so no internal working fluid flows through this position. In this way, when the straight tube portion of the heat exchange tube passes through this position, it is equivalent to passing through only one layer of plate, and there is no need to use sealing rings and other structures to elastically seal this position. This can prevent the sealing ring with poor heat resistance from directly contacting the high-temperature working fluid passing through the heat exchange tube group 1, solving the problem of rubber degradation at high temperature. Therefore, when using this relatively compact tube-sheet heat exchanger, there is no need to consider the problem of excessively high temperature of the heat exchange working fluid, which is equivalent to solving the process complexity and space compactness problems of multi-media heat exchange equipment at the same time. In summary, the technical solution provided by the present invention effectively solves the technical problem that the use of commonly used multi-media heat exchangers is limited by the heat resistance of sealing materials and the design space process.

[0035] The raised positions 3 of the heat exchange plates 2 are in the shape of a circular platform, and the raised positions 3 of adjacent heat exchange plates 2 are in contact with each other. The raised positions 3 of the heat exchange plates 2 are all provided with mounting through holes, and the straight tube portion of the heat exchange tube group 1 is interference fit with the mounting through holes. The specific implementation method of the interference fit is preferably that the heat exchange tube group 1 and the raised positions 3 of the heat exchange plates 2 are hydraulically expanded and connected.

[0036] In the technical solution provided in the above embodiment, the specific structural design of the wavy concave-convex pattern on the heat exchange plate 2 is optimized, and a circular platform-shaped design is preferably adopted, so that the raised positions 3 of the adjacent heat exchange plates 2 can achieve a planar fit, which is easier to achieve a sealing effect than a curved surface or other forms of fit, ensuring that no internal working fluid flows through the position where the heat exchange tube passes through the heat exchange plate 2, so no elastic sealing setting is required.

[0037] refer to Figure 4-Figure 6 , Figure 4 A schematic diagram of the combined structure of a tube-sheet multi-media heat exchanger provided in an embodiment of the present invention; Figure 5 A schematic diagram of the combined structure of a tube-sheet multi-media heat exchanger provided in an embodiment of the present invention; Figure 6 A schematic diagram of the overall structure of a tube-sheet multi-media heat exchanger provided in an embodiment of the present invention.

[0038] Figure 4 and Figure 5 Two different inter-plate working medium flow modes are given respectively. Figure 4 can be regarded as a serial connection method. Figure 5 It can be regarded as a parallel connection. In each figure, the solid, hollow and dotted arrows indicate the flow direction of a different heat exchange medium. The corner positions of the heat exchange plate 2 are provided with corner holes 4 for passing other heat exchange mediums, and a connecting flow channel 5 is provided between the corner hole 4 and the wavy concave-convex pattern. Other heat exchange mediums such as the second heat exchange medium and the third heat exchange medium are input through the corner hole 4. By using different input positions of the heat exchange plate 2 and coordinating with different flow channel 5 designs on the heat exchange plate 2, the flow paths of the medium can be connected in series or in parallel.

[0039] The entire actual production process of the heat exchanger mainly includes the following steps: stamping the heat exchange plate 2, opening corner holes 4 on the corners of the heat exchange plate 2, opening straight tube through holes on the heat exchange plate 2, installing sealing rings on the edges of the heat exchange plate 2 and combining and fixing adjacent heat exchange plates 2, inserting the straight tube sections of the heat exchange tube group 1 and hydraulically expanding and connecting the straight tubes and the heat exchange plates 2, installing and pressing the partition 6 and the auxiliary pressing device, and welding the gap between the straight tubes of the heat exchange tube group 1 and the partition 6.

[0040] The tube-sheet multi-media heat exchanger also includes a pressing device arranged on the side of the heat exchange plate, which is used to press and fix multiple adjacent heat exchange plates. The tube-sheet multi-media heat exchanger also includes a partition arranged on the side of the heat exchange plate for separating different heat exchange areas. The straight tube section of the heat exchange tube group is fixedly connected to the partition by welding.

[0041] The partitions 6 can be used to separate the multiple heat exchange plates 2 in a set of equipment into units. A set of heat exchange tube groups 1 runs through multiple different heat exchange units. Each heat exchange unit includes multiple heat exchange plates 2. Different types of working fluids and different working fluid circulation methods can be used between the heat exchange plates 2 of different heat exchange units.

[0042] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0043] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tube-sheet type multi-media heat exchanger, comprising a plurality of heat exchange plates and a heat exchange tube group passing through the heat exchange plates, wherein the heat exchange tube group is used to accommodate a first heat exchange medium; characterized in that: The heat exchange plates are all provided with wavy concave and convex patterns, the edges of adjacent heat exchange plates are closed, and the space between the plates is used to accommodate other heat exchange media; the convex positions of adjacent heat exchange plates are close to each other, and the straight tube parts of the heat exchange tube group are close to the convex positions passing through the heat exchange plates, so that the other heat exchange media will flow along the ridge of the pattern to the convex positions of the next pattern on the left and right sides every time it passes through a convex position, forming many branches, so that the fluid fills the entire heat exchange plate, so that the media flowing between the plates form a complex turbulence to enhance heat transfer; The raised parts of the heat exchange plates are in the shape of circular platforms, and the raised parts of adjacent heat exchange plates are in contact with each other; The raised positions of the heat exchange plates are all provided with mounting through holes, and the straight tube portions of the heat exchange tube groups are interference fit with the mounting through holes; The heat exchange plate is formed by stamping.

2. The tube-sheet multi-media heat exchanger according to claim 1, characterized in that: The heat exchange tube group is hydraulically expanded and connected to the raised position of the heat exchange plate.

3. The tube-sheet multi-media heat exchanger according to claim 1 or 2, characterized in that: Corner holes for passing other heat exchange media are arranged at the corners of the heat exchange plate, and a communicating flow channel is arranged between the corner holes and the wavy concave-convex patterns.

4. The tube-sheet multi-media heat exchanger according to claim 3, characterized in that: Sealing rings are provided at the edge areas between adjacent heat exchange plates for sealing and connecting adjacent heat exchange plates.

5. The tube-sheet multi-media heat exchanger according to claim 4, characterized in that: The tube-sheet type multi-media heat exchanger further comprises a pressing device arranged on the side of the heat exchange plate, which is used to press and fix a plurality of adjacent heat exchange plates.

6. The tube-sheet multi-media heat exchanger according to claim 5, characterized in that: The tube-sheet type multi-media heat exchanger further comprises a partition plate arranged on the side of the heat exchange plate for separating different heat exchange areas, and the straight tube section of the heat exchange tube group is fixedly connected to the partition plate by welding.

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