Multi-flow combined plate heat exchanger

Abstract

The utility model relates to a kind of multi-flow combined plate heat exchanger, belong to plate heat exchanger technical field, including front end plate and the rear end plate of setting in the back of front end plate, front end plate is with the rear end plate between being provided with the multi-flow heat exchange group that can realize heat exchange treatment, the multi-flow heat exchange group includes the two first heat exchange sheet of being set between front end plate and rear end plate.The multi-flow combined plate heat exchanger, by adopting the first heat exchange sheet, second heat exchange sheet and third heat exchange sheet that sheet corrugation inclination and depth are not same, so that the heat exchange characteristics of different flow in the same heat exchanger can be customized, different sheet is separated into independent flow group by intermediate partition, and flow channel is guided using the flow guide hole opened on it, can be flexibly configured as series connection, parallel connection or mixed connection flow, this makes a heat exchanger can adapt to multiple complex process requirements, greatly enhance the versatility and application range of equipment.

Description

Technical Field

[0001] This utility model relates to the field of plate heat exchanger technology, specifically a multi-flow combined plate heat exchanger. Background Technology

[0002] Plate heat exchangers are highly efficient heat exchange devices composed of a series of specially corrugated metal plates stacked together. Heat transfer between two fluids is achieved through thin channels between the plates. Their core design includes herringbone corrugated plates, gasket sealing structure, and counter-current flow layout, offering significant advantages such as high heat transfer efficiency, compact structure, and convenient maintenance.

[0003] Chinese utility model patent CN222104480U discloses a combined plate heat exchanger structure, including a fixed frame. The fixed frame includes a base plate, and two support plates are symmetrically arranged on the top surface of the base plate. Several sets of slots are symmetrically opened between the opposite surfaces of the two support plates. A heat exchange plate is arranged between the corresponding slots of the two support plates, and the heat exchange plate is connected to the slot. A through hole is opened through the side wall of the heat exchange plate, and a heat exchange tube is inserted into the through hole. A second fixing plate is symmetrically arranged on the outer top of the support plate. A cover plate is fitted on the top of the heat exchange plate, and a third fixing plate is symmetrically arranged on both sides of the cover plate. The third fixing plate is connected to the second fixing plate, and a bolt is inserted between the third fixing plate and the corresponding second fixing plate. This utility model allows the heat exchange plate to be inserted along the slots, enabling quick assembly and disassembly of the heat exchanger without additional fixing. It is simple to operate and easy to assemble.

[0004] However, in the process of using this utility model, traditional plate heat exchangers usually adopt a single-flow design, that is, all plates form a unified flow channel sequence. This one-size-fits-all design is inadequate when facing complex process requirements and cannot meet production needs. Therefore, a multi-flow combined plate heat exchanger is proposed to solve the problems mentioned above. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a multi-flow combined plate heat exchanger, which has the advantages of multi-flow combination. It solves the problem that traditional plate heat exchangers usually adopt a single-flow design, that is, all plates form a unified flow channel sequence. This one-size-fits-all design is inadequate when facing complex process requirements and cannot meet production needs.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a multi-pass combined plate heat exchanger, comprising a front end plate and a rear end plate disposed on the back of the front end plate, wherein a multi-pass heat exchange group capable of heat exchange processing is disposed between the front end plate and the rear end plate.

[0007] The multi-process heat exchange group includes two first heat exchange plates disposed between the front end plate and the rear end plate. Two second heat exchange plates and two third heat exchange plates are also disposed between the front end plate and the rear end plate. An intermediate partition is disposed between each of the first heat exchange plates, the second heat exchange plates and the third heat exchange plates. Plate corrugations are disposed on the outer surface of the first heat exchange plates.

[0008] Furthermore, the inclination angles of the corrugations on the first, second, and third heat exchange plates are all different, and the corrugation depths of the three plates are also all different.

[0009] Furthermore, the first heat exchange plate, the second heat exchange plate, and the third heat exchange plate are each provided with four corner holes, and the intermediate partition plate is provided with guide holes that communicate with the corner holes.

[0010] Furthermore, the front end plate is fixedly connected to a hot water inlet, a cold water inlet, a hot water outlet, and a cold water outlet, respectively, and the hot water inlet, cold water inlet, hot water outlet, and cold water outlet are respectively connected to four corner holes.

[0011] Furthermore, a flange is fixedly connected to one end of each of the hot water inlet, cold water inlet, hot water outlet, and cold water outlet, and the hot water inlet and hot water outlet are located on the same side of the front end plate.

[0012] Furthermore, a threaded guide rod is slidably connected between the front end plate and the rear end plate, and the threaded guide rod passes through both the front end plate and the rear end plate. The external thread of the threaded guide rod is connected to a clamping nut that can simultaneously tighten the front end plate and the rear end plate.

[0013] Furthermore, a support column is provided on the side of the rear end plate away from the front end plate, and a reinforcing rod is fixedly connected between the support column and the front end plate. The reinforcing rod passes through the rear end plate and is slidably connected to it. A first mounting base and a second mounting base are fixedly connected to the bottom of the support column and the front end plate, respectively.

[0014] Compared with the prior art, this utility model provides a multi-flow combined plate heat exchanger, which has the following advantages:

[0015] 1. This multi-pass combined plate heat exchanger, by employing first, second, and third heat exchange plates with different corrugation angles and depths, allows for customization of the heat exchange characteristics of different processes within the same heat exchanger. A partition in the middle separates the different plates into independent process groups, and the flow channels are guided by the guide holes on these plates. This allows for flexible configuration as series, parallel, or mixed processes, enabling a single heat exchanger to adapt to various complex process requirements and greatly enhancing the equipment's versatility and application range.

[0016] 2. This multi-pass combined plate heat exchanger, through the use of threaded guide rods and clamping nuts for fastening, provides uniform and powerful clamping force to the entire plate assembly, effectively preventing internal media leakage and ensuring reliable sealing. The support columns and reinforcing rods form a stable support frame, which not only facilitates installation and fixing but also effectively resists vibration and deformation caused by thermal stress during equipment operation. This ensures the structural integrity and stability of the equipment under long-term operation, extends its service life, and solves the problem that traditional plate heat exchangers typically adopt a single-pass design, where all plates form a unified flow channel sequence. This one-size-fits-all design is inadequate when facing complex process requirements and cannot meet production needs. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present utility model;

[0018] Figure 2 This is a perspective view of the multi-process heat exchanger assembly of this utility model;

[0019] Figure 3 This is a perspective view of the back of this utility model.

[0020] In the diagram: 1. Front end plate; 2. Rear end plate; 3. Multi-pass heat exchanger assembly; 31. First heat exchange plate; 32. Intermediate partition plate; 33. Second heat exchange plate; 34. Third heat exchange plate; 35. Plate corrugations; 36. Corner hole; 4. Hot water inlet; 5. Cold water inlet; 6. Hot water outlet; 7. Cold water outlet; 8. Threaded guide rod; 9. Compression nut; 10. Support column; 11. Reinforcing rod; 12. First mounting base; 13. Second mounting base. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1 and Figure 2This embodiment of a multi-pass combined plate heat exchanger includes a front end plate 1 and a rear end plate 2 disposed on the back of the front end plate 1. A multi-pass heat exchange group 3 capable of heat exchange is disposed between the front end plate 1 and the rear end plate 2. The multi-pass heat exchange group 3 includes two first heat exchange plates 31 disposed between the front end plate 1 and the rear end plate 2. Two second heat exchange plates 33 and two third heat exchange plates 34 are also disposed between the front end plate 1 and the rear end plate 2. A partition plate 32 is disposed between each of the first heat exchange plates 31, the second heat exchange plates 33 and the third heat exchange plates 34. Plate corrugations 35 are disposed on the outer surface of the first heat exchange plates 31.

[0023] Specifically, the inclination angles of the corrugations 35 on the first heat exchange plate 31, the second heat exchange plate 33, and the third heat exchange plate 34 are all different, and the corrugation depths of the three plate corrugations 35 are also different. Four corner holes 36 are provided on the first heat exchange plate 31, the second heat exchange plate 33, and the third heat exchange plate 34, and a guide hole connected to the corner holes 36 is provided on the middle partition plate 32.

[0024] It should be noted that the first heat exchange plate 31 can adopt a large tilt angle and deep corrugation design to generate strong turbulence and achieve a high heat transfer coefficient; the second heat exchange plate 33 can adopt a medium tilt angle and medium corrugation to achieve a balance between heat transfer and pressure drop; while the third heat exchange plate 34 can adopt a small tilt angle and shallow corrugation design to achieve low flow resistance. The intermediate partition 32 and the flow guide holes on it together constitute the process control center of this device. By carefully designing the position of the flow guide holes on different intermediate partitions 32, the flow path of the fluid between different plate groups can be precisely guided.

[0025] Please see Figure 1 In this embodiment, the front end plate 1 is fixedly connected to a hot water inlet 4, a cold water inlet 5, a hot water outlet 6, and a cold water outlet 7. The hot water inlet 4, the cold water inlet 5, the hot water outlet 6, and the cold water outlet 7 are respectively connected to four corner holes 36. One end of each of the hot water inlet 4, the cold water inlet 5, the hot water outlet 6, and the cold water outlet 7 is fixedly connected to a flange. The hot water inlet 4 and the hot water outlet 6 are located on the same side of the front end plate 1.

[0026] Specifically, all interfaces are centrally located on front-end board 1, forming an integrated interface module. This design greatly simplifies the connection of external pipelines and facilitates on-site installation and system integration.

[0027] It should be noted that the interface layout follows industry practice, with the inlet and outlet of the hot fluid (hot water) arranged on the same side and the inlet and outlet of the cold fluid (cold water) arranged on the other side. This conforms to the basic principle of diagonal flow, which is conducive to forming an efficient average temperature difference. The flange connection method ensures the sealing reliability and connection strength of the interface, and can withstand high pipeline stress.

[0028] Please see Figure 1 and Figure 3 In this embodiment, a threaded guide rod 8 is slidably connected between the front end plate 1 and the rear end plate 2. The threaded guide rod 8 passes through both the front end plate 1 and the rear end plate 2. The external thread of the threaded guide rod 8 is connected to a clamping nut 9 that can simultaneously tighten the front end plate 1 and the rear end plate 2.

[0029] Specifically, a support column 10 is provided on the side of the rear end plate 2 away from the front end plate 1. A reinforcing rod 11 is fixedly connected between the support column 10 and the front end plate 1. The reinforcing rod 11 passes through the rear end plate 2 and is slidably connected to it. A first mounting seat 12 and a second mounting seat 13 are fixedly connected to the bottom of the support column 10 and the front end plate 1, respectively.

[0030] It should be noted that the threaded guide rod 8 and the clamping nut 9 constitute the main clamping system, which can apply a uniform and stable clamping force to the entire plate assembly. This is the key to ensuring the sealing between the plates and preventing leakage of the medium inside and outside. The support column 10 and the reinforcing rod 11 together form a stable frame structure.

[0031] The working principle of the above embodiments is as follows:

[0032] High-temperature hot water flows in from the hot water inlet 4 and enters the flow channel formed by the first heat exchange plates 31 through the corner hole 36. Low-temperature cold water flows in from the cold water inlet 5 and enters the adjacent flow channel through the corner hole 36. The two fluids flow in opposite directions in the gap between the plates. The hot water first flows through the first heat exchange plate group 31. This plate adopts a large-angle deep corrugation, which can violently disturb the fluid and achieve extremely high initial heat exchange efficiency, causing the hot water temperature to drop rapidly. In the second plate group, the hot water continues to exchange heat. At this time, since the water temperature has dropped, the use of balanced plates can start to control the pressure drop while maintaining good heat exchange. In the third plate group, the hot water is close to the outlet temperature. The use of low-resistance shallow corrugated plates can minimize the total pumping power consumption of the system. Finally, the cooled hot water is discharged from the hot water outlet 6.

[0033] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods, and any method that can achieve its beneficial effects can be implemented.

[0034] It should be noted that the orientations or positional relationships indicated herein are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of facilitating the description of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-pass combined plate heat exchanger, comprising a front end plate (1) and a rear end plate (2) disposed on the back side of the front end plate (1), characterized in that: A multi-process heat exchange group (3) capable of heat exchange processing is provided between the front end plate (1) and the rear end plate (2); The multi-process heat exchange group (3) includes two first heat exchange plates (31) disposed between the front end plate (1) and the rear end plate (2). Two second heat exchange plates (33) and two third heat exchange plates (34) are also disposed between the front end plate (1) and the rear end plate (2). A middle partition plate (32) is disposed between the first heat exchange plates (31), the second heat exchange plates (33) and the third heat exchange plates (34). Plate corrugations (35) are disposed on the outer surface of the first heat exchange plates (31).

2. The multi-pass combined plate heat exchanger according to claim 1, characterized in that: The inclination angles of the corrugations (35) on the first heat exchange plate (31), the second heat exchange plate (33), and the third heat exchange plate (34) are all different, and the corrugation depths of the three corrugations (35) are also different.

3. The multi-pass combined plate heat exchanger according to claim 1, characterized in that: The first heat exchange plate (31), the second heat exchange plate (33) and the third heat exchange plate (34) are each provided with four corner holes (36), and the middle partition plate (32) is provided with a guide hole that communicates with the corner holes (36).

4. A multi-pass combined plate heat exchanger according to claim 3, characterized in that: The front end plate (1) is fixedly connected to a hot water inlet (4), a cold water inlet (5), a hot water outlet (6), and a cold water outlet (7). The hot water inlet (4), the cold water inlet (5), the hot water outlet (6), and the cold water outlet (7) are respectively connected to four corner holes (36).

5. A multi-pass combined plate heat exchanger according to claim 4, characterized in that: One end of each of the hot water inlet (4), cold water inlet (5), hot water outlet (6), and cold water outlet (7) is fixedly connected to a flange. The hot water inlet (4) and the hot water outlet (6) are located on the same side of the front of the front panel (1).

6. A multi-pass combined plate heat exchanger according to claim 1, characterized in that: A threaded guide rod (8) is slidably connected between the front end plate (1) and the rear end plate (2). The threaded guide rod (8) passes through both the front end plate (1) and the rear end plate (2). The external thread of the threaded guide rod (8) is connected to a clamping nut (9) that can simultaneously tighten the front end plate (1) and the rear end plate (2).

7. A multi-pass combined plate heat exchanger according to claim 1, characterized in that: A support column (10) is provided on the side of the rear end plate (2) away from the front end plate (1). A reinforcing rod (11) is fixedly connected between the support column (10) and the front end plate (1). The reinforcing rod (11) passes through the rear end plate (2) and is slidably connected to it. A first mounting seat (12) and a second mounting seat (13) are fixedly connected to the bottom of the support column (10) and the front end plate (1), respectively.

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