A topological structure plate-tube heat exchanger

Abstract

The utility model relates to a kind of topology structure plate tube heat exchanger, it includes first tube sheet and second tube sheet oppositely arranged along left and right direction, multiple heat exchange plate tubes are equipped between the first tube sheet and the second tube sheet, heat exchange plate tube of same row or same column is also connected through at least one heat exchange node spaced distribution along left and right direction between the conduction, and the heat exchange node includes flow passage main body and four connecting parts, the flow passage main body is connected with one of heat exchange plate tube through two connecting parts spaced distribution along left and right direction, and is connected with another heat exchange plate tube through other two left and right direction spaced distribution connecting parts.The utility model heat exchanger is connected through heat exchange node between heat exchange plate tube, breaks the geometric limit of traditional flow passage design, increases effective heat transfer area and improves fluid disturbance, to improve heat transfer coefficient;And topology structure can more evenly distribute heat load, avoid local hot spot, reduce overall thermal resistance.

Description

Technical Field

[0001] This utility model relates to the fields of oil refining and chemical industry, and more specifically, to a topological plate-tube heat exchanger. Background Technology

[0002] The performance of heat exchangers directly impacts the efficiency and lifespan of equipment. Furthermore, the heat exchange capacity and pressure loss of heat exchangers largely depend on the internal flow path conditions. Designing high-performance heat exchangers is a challenging task, requiring consideration of various factors such as efficiency, energy consumption, and fluid separation. Traditional, simple-shaped heat exchangers, such as plates and tubes, have limitations that make them insufficient for effectively handling the increasing heat loads generated by modern equipment. It is necessary to introduce innovative structures for high-performance heat exchangers, enabling them to possess superior flow heat transfer performance to cope with these ever-increasing heat loads. Summary of the Invention

[0003] The purpose of this invention is to provide a topological plate-tube heat exchanger that, by adding heat exchange nodes between adjacent heat exchange plates and tubes, enables the connection and conduction between adjacent heat exchange tubes at different positions in the fluid flow direction, thereby increasing the flow path and flow range of the fluid and achieving better heat exchange performance.

[0004] The purpose of this utility model and the technical problem it solves are achieved by the following technical solution. According to this utility model, a topological plate-tube heat exchanger includes a first tube sheet and a second tube sheet arranged opposite each other in the left-right direction. Multiple heat exchange tubes are disposed between the first and second tube sheets. Heat exchange tubes arranged in the same row or column are connected and conductive through at least one heat exchange node spaced apart in the left-right direction. Each heat exchange node includes a flow channel body and four connecting parts disposed on one side of the flow channel body. The flow channel body is connected and conductive to one heat exchange tube through two of the spaced-apart connecting parts in the left-right direction, and to another heat exchange tube through the other two spaced-apart connecting parts in the left-right direction.

[0005] The purpose of this utility model and the technical problems to be solved can be further achieved by the following technical measures.

[0006] In the aforementioned topological plate-tube heat exchanger, adjacent heat exchange nodes are connected and conductive.

[0007] The aforementioned topological plate-tube heat exchanger achieves symmetrical distribution of heat exchange nodes connecting the two heat exchange plates on both sides of the two heat exchange plates.

[0008] The aforementioned topological plate-tube heat exchanger is symmetrically distributed between two heat exchange nodes on both sides of the two heat exchange plates and tubes, and is connected and fixed by connectors.

[0009] In the aforementioned topological plate-tube heat exchanger, the main flow channel of the heat exchange node includes a first flow channel extending parallel to the heat exchange plate tubes. One side of the first flow channel is connected to two heat exchange plate tubes through a connecting part, and the other side is connected to a second flow channel through two connecting parts. The size of the second flow channel is smaller than that of the first flow channel.

[0010] In the aforementioned topological plate-tube heat exchanger, the connecting portions on both sides of the first flow channel are spaced apart and distributed in the middle of the first flow channel extending in the left-right direction.

[0011] In the aforementioned topological plate-tube heat exchanger, the second flow channel on the side opposite to the first flow channel is also connected to two other heat exchange plate tubes through four connecting parts.

[0012] In the aforementioned topological plate-tube heat exchanger, the flow channel body is parallel to the heat exchange plate tube, with two connecting parts connected to the left end of the flow channel body and two other connecting parts connected to the right end of the flow channel body. The connecting parts are bent pipes that enable smooth communication between the flow channel body and the heat exchange plate tube.

[0013] In the aforementioned topological plate-tube heat exchanger, the other side of the flow channel body is connected to two more heat exchange plate tubes through four additional connecting parts.

[0014] In the aforementioned topological plate-tube heat exchanger, the heat exchange plate tube has a rectangular cross-section.

[0015] Compared with the prior art, this utility model has significant advantages and beneficial effects. Through the above technical solution, this utility model achieves considerable technological advancement and practicality, and has broad industrial application value. It possesses at least the following advantages:

[0016] This invention achieves interconnection between heat exchanger plates and tubes through multiple heat exchange nodes, allowing the first heat exchange medium to flow freely between different heat exchanger plates and tubes, thus giving the heat exchanger the following characteristics:

[0017] 1) Improved heat transfer efficiency: The flow channel and heat transfer are optimized by adopting methods such as fractals and multi-level branches to break the geometric limitations of traditional designs, increase the effective heat transfer area or improve fluid disturbance, thereby increasing the heat transfer coefficient; and reduce thermal resistance. The topology can distribute the heat load more evenly, avoid local hot spots, and reduce the overall thermal resistance.

[0018] 2) Reduced pressure drop and energy consumption, minimized flow resistance: Topology optimization can reconcile the contradiction between heat transfer and flow resistance, generating streamlined flow channels, reducing unnecessary flow separation, thereby reducing pressure drop and saving pump power. Under the same heat transfer conditions, optimized design of the heat exchanger plate and tube topology may reduce the power consumption of fans / pumps and improve the overall energy efficiency of the system.

[0019] 3) High reliability and ease of use. The bus structure is simple, less prone to blockage, and highly reliable. Adding a new node simply requires connecting it to any point on the heat exchanger tube bus. Installation is easy and requires relatively low technical expertise. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the topological structure of the plate-tube heat exchanger according to an embodiment of the present invention;

[0021] Figure 2 for Figure 1 Enlarged view of part of the image;

[0022] Figure 3 This is a top view of the heat exchange element in Embodiment 1 of this utility model;

[0023] Figure 4 This is a front view of the heat exchange element in Embodiment 1 of this utility model;

[0024] Figure 5 This is a cross-sectional schematic diagram of the heat exchange element in Embodiment 1 of this utility model;

[0025] Figure 6 This is a top view of the heat exchange element in Embodiment 2 of this utility model;

[0026] Figure 7 This is a front view of the heat exchange element in Embodiment 2 of this utility model;

[0027] Figure 8 This is a cross-sectional schematic diagram of the heat exchange element in Embodiment 3 of this utility model.

[0028] [Explanation of Key Component Symbols]

[0029] 1: First tube sheet

[0030] 2: Fluid inlet

[0031] 3: Heat exchange nodes

[0032] 4: Second tube sheet

[0033] 5: Heat exchanger tubes

[0034] 6: Fluid outlet

[0035] 7: Connectors Detailed Implementation

[0036] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended purpose of the invention, the following detailed description of the specific implementation method, structure, features and effects of the topological plate-tube heat exchanger proposed according to this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0037] Please see Figure 1 and Figure 2 This is a structural schematic diagram of the topological plate-tube heat exchanger of this utility model. The heat exchanger includes a shell, a first tube sheet 1 on the right side panel, and a second tube sheet 4 on the left side panel. Multiple heat exchange tubes 5 are disposed between the first tube sheet 1 and the second tube sheet 4. The inlet end of each heat exchange tube 5 is connected to the first tube sheet 1, and an externally input first heat exchange medium is transported to the heat exchange tube 5 through the first tube sheet 1. The outlet end of each heat exchange tube 5 is connected to the second heat exchange tube 4, and the heat-exchanged first heat exchange medium is transported to the second heat exchange tube 4, where it is then discharged. In this embodiment, the first heat exchange medium is cold air. The cold air enters the first tube sheet 1 through the inlet, then enters each heat exchange tube 5 through the first tube sheet 1, then enters the second tube sheet 4 through the heat exchange tubes 5, and finally flows out through the air outlet on the second tube sheet 4.

[0038] The upper end face of the shell is provided with a fluid inlet 2 for the second heat exchange medium to enter, and the lower end face is provided with a fluid outlet 6 for the second heat exchange medium to flow out. In this embodiment, the second heat exchange medium is high-temperature flue gas. The high-temperature flue gas enters the shell of the heat exchanger through the fluid inlet 2, and then flows to the fluid outlet 6 through the gap between the heat exchange plate tubes 5. During the flow, it contacts the outer wall of the heat exchange plate tubes 5 for heat exchange.

[0039] In this embodiment of the invention, the direction in which the heat exchange tubes 5 are arranged along the front-to-back direction inside the shell 1 is defined as a row, and the direction in which they are arranged along the top-to-bottom direction of the shell (the second heat exchange medium flow direction) is defined as a column. The heat exchange tubes 5 arranged in the same row are also connected and conductive through at least one heat exchange node 3. The heat exchange node 3 includes a flow channel body 31 extending along the length of the heat exchange tube 5 and connecting portions 32 distributed on one side of the flow channel body. In the first heat exchange medium flow direction within the heat exchange tube 5, the rear end of the flow channel body 31 is connected and conductive to one heat exchange tube 5 respectively through two connecting portions 32, and the front end is also connected and conductive to one heat exchange tube 5 respectively through two connecting portions 32, enabling the flow channels to connect between the heat exchange tubes 5. In this embodiment, each heat exchange node 3 has two inlets and two outlets.

[0040] Please see Figures 3-5This is a schematic diagram of the connection between the heat exchange plate tubes 5 and the heat exchange node 3 in Embodiment 1 of this utility model. In this embodiment, adjacent heat exchange plate tubes 5 in the same row are connected and conductive through the heat exchange node 3. The two ends of the same heat exchange node 3 are respectively connected and conductive to different positions along the length of the two corresponding heat exchange plate tubes 5. This allows the first heat exchange medium in the adjacent heat exchange plate tubes 5 to enter the heat exchange node 3, flow along the heat exchange node 3 for a set length, and then return to the heat exchange plate tubes. During this process, the first heat exchange medium in the two heat exchange plate tubes 5 will converge and flow and exchange heat for a certain length before returning to the two heat exchange plate tubes 5. The setting of the heat exchange node 3 in this utility model not only increases the heat exchange area, but also realizes the conductivity of the flow channels between the heat exchange plate tubes 5, allowing the fluid to flow freely under the impetus of the medium temperature difference, which can distribute the heat load more evenly, avoid local hot spots, reduce the overall thermal resistance, and avoid the blockage of the flow channels.

[0041] In this embodiment, among the heat exchanger tubes 5 arranged in the same row, adjacent heat exchanger tubes 5 are connected and conductive in their extension direction by a plurality of heat exchange nodes 3. Preferably, at least one of the plurality of heat exchange nodes 3 connecting two heat exchanger tubes 5 is distributed above the two heat exchanger tubes 5, and at least one is distributed below the two heat exchanger tubes 5. The upper and lower sides of the same position of adjacent heat exchanger tubes 5 in their extension direction are connected and conductive by two oppositely distributed heat exchange nodes 3. That is, the projections of the two oppositely distributed heat exchange nodes 3 above and below the two heat exchanger tubes 5 in the vertical direction coincide. Preferably, the two oppositely distributed heat exchange nodes 3 are also connected by a connector 7, which is located between the two heat exchanger tubes 5. The arrangement of the connector 7 can further enhance the stability of the connection between the heat exchanger tubes.

[0042] In this embodiment, the heat exchange node 3 has a U-shaped cross-section, and multiple heat exchange nodes 3 are evenly distributed along the length (left-right direction) of the heat exchange plate tube 5. Preferably, the heat exchange node 3 is connected to the center position of two connecting plate tubes 5 through the connecting parts 32 at both ends. Preferably, the connecting plate tube 5 is a rectangular plate tube.

[0043] In this embodiment, the flow channel body 31 is a rectangular plate tube parallel to the connecting plate tube 5, and the connecting part 32 is connected to the end of the rectangular plate tube. Preferably, the connecting part 32 is a bent tube that enables smooth flow between the flow channel body 31 and the heat exchange plate tube 5.

[0044] Please see Figures 6-8This is a schematic diagram of the connection between the heat exchange plate tube 5 and the heat exchange node 3 in Embodiment 2 of this utility model. The difference between this embodiment and Embodiment 1 is that the flow channel body 31 of the heat exchange node 3 is cross-shaped, including a first flow channel 311 arranged parallel to the heat exchange plate tube 5 and a second flow channel 312 connected above the first flow channel 311. The overall size of the second flow channel 312 is smaller than that of the first flow channel 311, and the projection of the second flow channel 312 on the first flow channel 311 is located inside the first flow channel 311, and has a center consistent with the first flow channel 311. The first flow channel 311 is also connected to two sets of heat exchange plate tubes 5 through two sets of connecting components below it. Each set of connecting components includes two connecting parts 32. The two connecting parts 32 of one set of connecting components are connected to the rear center of the two heat exchange plate tubes 5, and the two connecting parts 32 of the other set of connecting components are connected to the front center of the two heat exchange plate tubes 5.

[0045] In other embodiments of this utility model, adjacent heat exchanger tubes 5 arranged in the same column are also connected and conductive through heat exchange nodes 3. In this case, the heat exchanger tubes 5 arranged in the same column are connected and conductive through two heat exchange nodes 3. That is, as in Embodiments 1 and 2 of this utility model, the heat exchange nodes 3 connecting adjacent heat exchanger tubes 5 in the same row are mutually conductive. Since the heat exchanger tubes 5 in the same row are connected and conductive through heat exchange nodes 3, and the positions of the connecting heat exchange nodes 3 on different rows of heat exchanger tubes 5 are the same, when the heat exchanger tubes 5 are arranged in columns, the heat exchange nodes 3 are also arranged in columns, and the heat exchange nodes 3 between adjacent columns are connected and conductive, thereby enabling the heat exchanger tubes 5 in adjacent columns to also be connected and conductive.

[0046] In another embodiment of this utility model, the upper part of the flow channel body 32 of the same heat exchange node 3 is connected to two adjacent heat exchange plate tubes 5 through four connecting parts 32, and the lower part is also connected to two other heat exchange plate tubes 5 through four connecting parts 32. This allows multiple heat exchange nodes and heat exchange plate tubes to form a bus-type topology structure plate. The heat exchange medium inside the tube can enter the heat exchange node, and then enter another heat exchange plate tube through the heat exchange node, completing heat exchange with the medium outside the heat exchange plate tube within the heat exchange node and heat exchange plate tube. At this time, the flow channel body 32 is a flow channel cavity arranged in parallel with the heat exchange plate tubes or a structure composed of two or more flow channel cavities arranged in parallel with the heat exchange plate tubes through connecting parts, such as the cross-shaped structure in Embodiment 2.

[0047] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A topological plate-tube heat exchanger, comprising a first tube sheet and a second tube sheet arranged opposite each other in a left-right direction, wherein a plurality of heat exchange tubes are disposed between the first tube sheet and the second tube sheet, characterized in that: The heat exchanger tubes arranged in the same row or column are also connected by at least one heat exchange node distributed at intervals in the left and right direction. The heat exchange node includes a flow channel body and four connecting parts. The flow channel body is connected to one of the heat exchanger tubes through two of the connecting parts distributed at intervals in the left and right direction, and is connected to another heat exchanger tube through the other two connecting parts distributed at intervals in the left and right direction.

2. The topological plate-tube heat exchanger according to claim 1, characterized in that: The adjacent heat exchange nodes are connected.

3. The topological plate-tube heat exchanger according to claim 1, characterized in that: The heat exchange nodes that enable the connection and conduction between the two heat exchanger tubes are symmetrically distributed on both sides of the two heat exchanger tubes.

4. The topological plate-tube heat exchanger according to claim 3, characterized in that: The two heat exchange nodes, symmetrically distributed on both sides of the two heat exchange plate tubes, are connected and fixed by connectors.

5. The topological plate-tube heat exchanger according to claim 1, characterized in that: The main flow channel of the heat exchange node includes a first flow channel with parallel heat exchange plate tubes. One side of the first flow channel is connected to two heat exchange plate tubes through a connecting part, and the other side is connected to a second flow channel through two connecting parts. The size of the second flow channel is smaller than that of the first flow channel.

6. The topological plate-tube heat exchanger according to claim 5, characterized in that: The second flow channel, on the side opposite to the first flow channel, is also connected to two other heat exchange plate tubes via four connecting parts.

7. The topological plate-tube heat exchanger according to claim 1, characterized in that: The main body of the flow channel is parallel to the heat exchange plate tube, with two connecting parts connected to the left end of the main body of the flow channel and two other connecting parts connected to the right end of the main body of the flow channel. The connecting parts are bent pipes that enable smooth connection between the main body of the flow channel and the heat exchange plate tube.

8. The topological plate-tube heat exchanger according to claim 7, characterized in that: The other side of the main flow channel is connected to two heat exchanger tubes via four additional connecting parts.

9. The topological plate-tube heat exchanger according to any one of claims 1-8, characterized in that: The heat exchanger tube has a rectangular cross-section.

10. The topological plate-tube heat exchanger according to claim 9, characterized in that: It also includes a shell, wherein the first tube sheet and the second tube sheet respectively form the left and right end faces of the shell, and the upper and lower end faces of the shell are also provided with fluid inlets for the second heat exchange medium to enter the shell and fluid outlets for the second heat exchange medium to flow out of the shell.

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