A tubular heat exchanger

Abstract

The utility model relates to heat exchanger technical field, concretely relates to a tubular heat exchanger, including the casing, be equipped with heat source flow channel and cold source flow channel in this casing, still be equipped with several heat exchange pipe assemblies in the casing, this heat exchange pipe assembly is from inside to outside in proper order the inner tube, intermediate pipe and outer tube of setting, the first passageway is formed to the inner tube inside, the intermediate passageway is formed between the inner tube and intermediate pipe, the second passageway is formed between intermediate pipe and outer tube, first passageway, second passageway all are linked together with cold source flow channel, and the intermediate passageway is linked together with heat source flow channel, and the intermediate passageway is equipped with the turbulence subassembly, and first passageway and / or second passageway are installed with the flow guide subassembly, the utility model can increase the heat exchange area in fixed shell course, improve the heat exchange efficiency. In addition, the turbulence subassembly is arranged in the intermediate passageway, and the flow guide subassembly is arranged in first passageway and / or second passageway, improves the heat exchange efficiency of cold source, heat source.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, specifically to a tubular heat exchanger. Background Technology

[0002] A heat exchanger is an energy-saving device that enables heat transfer between two or more fluids at different temperatures. It transfers heat from a higher-temperature fluid to a lower-temperature fluid, allowing the fluid temperature to reach the specified parameters of the process.

[0003] To improve energy efficiency, Chinese utility model patent with publication number CN222978646U discloses a wound tube heat exchanger. This prior art increases the heat exchange area by setting multiple stages of wound tubes in the cylinder, and these wound tubes are composed of nested inner and outer wound tubes.

[0004] How to further improve the heat exchange efficiency of heat exchangers is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] To address the problem of how to further improve heat exchange efficiency, the purpose of this invention is to provide a tubular heat exchanger.

[0006] The technical solution provided by this utility model is as follows:

[0007] A tubular heat exchanger includes a shell, within which a heat source flow channel and a cold source flow channel are provided;

[0008] The housing is also equipped with several heat exchange tube assemblies, which include an inner tube, a middle tube, and an outer tube.

[0009] The inner tube, intermediate tube, and outer tube are nested sequentially from the inside to the outside. The inner tube forms a first channel, the inner tube and the intermediate tube form an intermediate channel, and the intermediate tube and the outer tube form a second channel. The first channel and the second channel are both connected to the cold source channel, and the intermediate channel is connected to the heat source channel.

[0010] The intermediate channel is equipped with a turbulence-inducing component, which is used to create turbulence in the heat source medium flowing in the channel.

[0011] The first channel and / or the second channel are equipped with a flow-guiding assembly for causing the cold source medium flowing in the channel to flow in a spiral shape.

[0012] As an optional technical solution, the turbulence-disrupting components are in multiple sets, each set of turbulence-disrupting components including concave parts and convex parts; the concave parts and convex parts are respectively arranged on both radial sides of the middle channel and are staggered along the axial direction of the middle channel.

[0013] Optionally, the spacing between two adjacent sets of aerodynamic components is denoted as d3; the radial dimension of the middle channel is denoted as d2; and the ratio of d3 to d2 ranges from 1 to 3.

[0014] Optionally, both the concave and convex parts are arc-shaped, and the arcs are oriented towards the two ends of the central channel axis, respectively, with the central angle θ of the arc ranging from 35° to 65°.

[0015] As an optional technical solution, the drainage assembly includes a drainage plate that is spiral in shape; the center line of the spiral drainage plate coincides with the axis of the intermediate tube.

[0016] As an optional technical solution, a pair of first partitions are installed at a distance from one end of the housing, and a pair of second partitions are installed at a distance from the other end.

[0017] A heat source inlet channel is formed between a pair of first partitions; a cold source outlet channel is formed between the first partition and the shell; a heat source outlet channel is formed between a pair of second partitions; and a cold source inlet channel is formed between the second partition and the shell.

[0018] Optionally, the two ends of the intermediate tube and the outer tube extend to the heat source inlet channel and the heat source outlet channel, respectively; the two ends of the inner tube extend to the cold source outlet channel and the cold source inlet channel, respectively; and the two ends of the second channel are connected to the cold source outlet channel and the cold source inlet channel, respectively, through transition components.

[0019] Furthermore, the transition component includes an annular end cap and a branch pipe; wherein, the annular end cap is installed at the end of the second channel and has several through holes; one end of the branch pipe is sealed to the through holes, and the other end of the branch pipe extends to the cold source outlet channel and the cold source inlet channel.

[0020] Optionally, heat source baffles are installed in the heat source inlet channel and the heat source outlet channel, so that the heat source flows back and forth in a roughly "S" shape in the tubular heat exchanger.

[0021] Furthermore, cold source baffles are installed in the cold source outlet channel and the cold source inlet channel, so that the cold source flows back and forth in a roughly "S" shape in the tubular heat exchanger, and the flow direction of the cold source in the first channel and the second channel is opposite to the flow direction of the heat source in the middle channel.

[0022] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0023] This invention utilizes an inner tube, a middle tube, and an outer tube arranged sequentially from the inside out to form a first channel, a middle channel, and a second channel from the inside out. Cold sources flow through the first and second channels, while heat sources flow through the middle channel. This increases the heat exchange area and improves heat exchange efficiency within a fixed shell side. Furthermore, a flow-inducing component is installed in the middle channel, and a flow-guiding component is installed in the first and / or second channels to further enhance the heat exchange efficiency between the cold and heat sources. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a tubular heat exchanger structure in one embodiment of this application;

[0025] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0026] Figure 3 This is a schematic diagram showing the flow direction of the heat source and cold source in one embodiment of this application;

[0027] Figure 4 This is a schematic diagram of branch pipe installation in one embodiment of this application;

[0028] Figure 5 This is a schematic diagram of the heat source baffle installation in one embodiment of this application;

[0029] Figure 6 This is a schematic diagram of the installation of the convex and concave parts in one embodiment of this application;

[0030] Figure 7 This is a schematic diagram showing the spacing between two adjacent sets of turbulence components and the radial dimension of the intermediate channel in one embodiment of this application;

[0031] Figure 8 This is a schematic diagram of a drainage plate in one embodiment of this application.

[0032] Explanation of the labels in the diagram:

[0033] Shell 101, cold source inlet channel 102, cold source outlet channel 103, second partition 104, first partition 105, heat source outlet channel 106, heat source inlet channel 107, heat source baffle 108, cold source inlet 201, cold source outlet 202, outer pipe 203, branch pipe 204, inner pipe 205, annular end cap 206, heat source inlet 301, heat source outlet 302, intermediate pipe 303, concave part 304, convex part 305, and flow guide plate 306. Detailed Implementation

[0034] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0035] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0036] In one embodiment, this application proposes a tubular heat exchanger, such as Figure 1 , 2 As shown in Figure 5, the device includes a housing 101, within which a heat source channel and a cold source channel are provided, and several heat exchanger tube assemblies are installed. The heat source enters the heat source channel and then the heat exchanger tube assembly; simultaneously, the cold source enters the cold source channel and then the heat exchanger tube assembly. The heat source and cold source exchange heat within the heat exchanger tube assembly. After multiple heat exchanges, the heat source flows out of the tubular heat exchanger from the heat source channel, and the cold source flows out of the tubular heat exchanger from the cold source channel.

[0037] The heat exchange tube assembly includes an inner tube 205, a middle tube 303, and an outer tube 203. The diameters of the inner tube 205, the middle tube 303, and the outer tube 203 increase sequentially, and all three are made of materials with good thermal conductivity.

[0038] The inner tube 205, the intermediate tube 303 and the outer tube 203 are sequentially installed from the inside to the outside, thereby forming a first channel inside the inner tube 205, an intermediate channel between the inner tube 205 and the intermediate tube 303, and a second channel between the intermediate tube 303 and the outer tube 203.

[0039] In this implementation scheme, the first and second channels are both connected to the cold source flow channel, and the middle channel is connected to the heat source flow channel. When the heat source flows into the middle channel, the cold source flows into the first and second channels at the same time, and the heat source exchanges heat with the two cold sources simultaneously, thereby improving the heat exchange efficiency. In addition, under the limitation of the finite shell side, this technical solution can also increase the heat exchange area.

[0040] To further improve heat exchange efficiency, in this embodiment, a turbulence-inducing component is provided in the intermediate channel. This component creates turbulence in the heat source medium flowing through the channel, meaning the heat source in the intermediate channel does not flow smoothly. For example, under the action of the turbulence-inducing component, the heat source will form turbulence, creating small vortices. This facilitates the heat from the heat source to be conducted through the intermediate pipe 303 to the cold source in the second channel, and through the inner pipe 205 to the cold source in the first channel. Furthermore, a flow-guiding component is installed in the first channel and / or the second channel. This component can be installed in either the first or second channel, or in both channels. The flow-guiding component allows the cold source medium flowing through the channel to flow in a spiral pattern, thereby further improving heat exchange efficiency.

[0041] For the aerodynamic components, as an optional implementation, such as Figure 6 , 7 As shown, the flow-disrupting components are arranged in multiple sets, spaced apart along the axial direction of the central channel. Each set includes a concave member 304 and a convex member 305, with the concave and convex members 304 and 305 corresponding to each other. Specifically, the concave and convex members 304 are arranged on both radial sides of the central channel and are staggered along the axial direction of the central channel. Furthermore, the radial dimension d2 of the central channel is greater than the sum of the radial dimensions of the concave and convex members 305, meaning that there is a gap between the concave and convex members 304 in the radial direction of the central channel. A portion of the heat source flowing in the central channel is guided by the concave member 304, then flows to the corresponding convex member 305, and then, guided by the convex member 305, flows to the next layer of concave members 304, repeating this process.

[0042] As an optional implementation scheme, such as Figure 7 As shown, the distance between two adjacent sets of turbulence-generating components is denoted as d3, and the radial dimension of the middle channel is denoted as d2. The ratio of d3 to d2 ranges from 1 to 3. At this point, the turbulence-generating components are arranged relatively closely, which helps the heat source to form turbulence under the action of multiple layers of turbulence-generating components. The heat source that forms turbulence can conduct heat more fully with the pipe wall of the middle channel, thereby improving the heat exchange efficiency.

[0043] It should be noted that the concave direction of the concave part 304 is the direction of the heat source, and the convex direction of the convex part 305 is the direction of the heat source. That is, both the concave part 304 and the convex part 305 are arc-shaped, and the arcs are oriented at the two ends of the central channel axis, respectively. The value range of the central angle θ of the arc is 35° to 65°.

[0044] Preferably, the concave part 304 and the convex part 305 are also made of materials with good thermal conductivity. In this case, the concave part 304 and the convex part 305 can also act as heat-conducting fins, thereby improving the heat exchange efficiency.

[0045] For the lead generation component, in one alternative embodiment, such as Figure 8 As shown, the flow-guiding assembly includes a flow-guiding plate 306, which is spiral-shaped. Under the action of the spiral flow-guiding plate 306, the cold source flows spirally in the first and second channels, allowing the cold source to fully conduct heat with the pipe walls of the first and second channels, thereby improving the heat exchange efficiency.

[0046] Optionally, the centerline of the spiral guide plate 306 coincides with the axis of the intermediate tube 303. The guide plate 306 can also be made of a material with good thermal conductivity, thereby further improving the heat exchange efficiency.

[0047] Regarding the structure of the heat source flow channel and the cold source flow channel, as an optional implementation scheme, such as... Figure 1-3 As shown in Figure 5, the shell 101 is tubular, with a pair of first partitions 105 installed at a distance from one end of the tubular shell 101, and a pair of second partitions 104 installed at a distance from the other end.

[0048] A heat source inlet channel 107 is formed between a pair of first partitions 105, and a cold source outlet channel 103 is formed between the first partitions 105 and the shell 101. A heat source outlet channel 106 is formed between a pair of second partitions 104, and a cold source inlet channel 102 is formed between the second partitions 104 and the shell 101. Correspondingly, a heat source inlet 301, a heat source outlet 302, a cold source inlet 201, and a cold source outlet 202 are provided on the shell 101. The heat source inlet 301 is connected to the heat source inlet channel 107, the heat source outlet 302 is connected to the heat source outlet channel 106, the cold source inlet 201 is connected to the cold source inlet channel 102, and the cold source outlet 202 is connected to the cold source outlet channel 103.

[0049] The two ends of the intermediate pipe 303 and the outer pipe 203 extend to the heat source inlet channel 107 and the heat source outlet channel 106, respectively, thereby connecting the two ends of the intermediate channel to the heat source inlet channel 107 and the heat source outlet channel 106, respectively. The two ends of the inner pipe 205 extend to the cold source outlet channel 103 and the cold source inlet channel 102, respectively. At this time, the two ends of the first channel formed inside the inner pipe 205 are connected to the cold source outlet channel 103 and the cold source inlet channel 102, respectively. For the second channel, its two ends are connected to the cold source outlet channel 103 and the cold source inlet channel 102, respectively, through transition components.

[0050] As an optional implementation scheme, such as Figure 4As shown, the transition assembly includes an annular end cap 206 and branch pipes 204. The annular end cap 206 is installed at the end of the second channel and has several through holes to prevent heat sources from entering the second channel. One end of the branch pipe 204 is sealed to the through holes, and the other end extends to the cold source outlet channel 103 and the cold source inlet channel 102. The cold source can flow through the branch pipe 204 between the second channel and the cold source outlet channel 103 and the cold source inlet channel 102. Several branch pipes 204 are provided, and there are gaps between each branch pipe 204 to ensure that the heat source does not obstruct the flow between the intermediate channel and the heat source inlet channel 107 and the heat source outlet channel 106.

[0051] like Figure 5 As shown, heat source baffles 108 are installed in the heat source inlet channel 107 and the heat source outlet channel 106, causing the heat source to flow back in a roughly "S" shape within the tubular heat exchanger. Optionally, cold source baffles (not shown in the figure) are installed in the cold source outlet channel 103 and the cold source inlet channel 102, causing the cold source to flow back in a roughly "S" shape within the tubular heat exchanger, and the flow direction of the cold source in the first and second channels is opposite to the flow direction of the heat source in the intermediate channel.

[0052] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A tubular heat exchanger, comprising a shell (101), wherein the shell (101) is provided with a heat source flow channel and a cold source flow channel; Its features are: The housing (101) is also equipped with a number of heat exchange tube assemblies, which include an inner tube (205), a middle tube (303) and an outer tube (203); The inner tube (205), the intermediate tube (303), and the outer tube (203) are sequentially installed from the inside to the outside. The inner tube (205) forms a first channel, the inner tube (205) and the intermediate tube (303) form an intermediate channel, and the intermediate tube (303) and the outer tube (203) form a second channel. The first channel and the second channel are both connected to the cold source channel, and the intermediate channel is connected to the heat source channel. The intermediate channel is equipped with a turbulence-inducing component, which is used to create turbulence in the heat source medium flowing in the channel. The first channel and / or the second channel are equipped with a flow-guiding assembly for causing the cold source medium flowing in the channel to flow in a spiral shape.

2. The tubular heat exchanger according to claim 1, characterized in that: The turbulence-disrupting components are in multiple groups, and each group of turbulence-disrupting components includes a concave member (304) and a convex member (305); The concave part (304) and the convex part (305) are respectively arranged on both sides of the radial direction of the middle channel and are staggered along the axial direction of the middle channel.

3. The tubular heat exchanger according to claim 2, characterized in that: The spacing between two adjacent sets of perturbation components is denoted as d3; The radial dimension of the middle channel is denoted as d2; The ratio of d3 to d2 ranges from 1 to 3.

4. The tubular heat exchanger according to claim 2, characterized in that: Both the concave part (304) and the convex part (305) are arc-shaped, and the arcs are oriented towards the two ends of the central channel axis, respectively. The value range of the central angle θ of the arc is 35° to 65°.

5. The tubular heat exchanger according to claim 1, characterized in that: The drainage assembly includes a drainage plate (306) which is spiral in shape; The centerline of the spiral drainage plate (306) coincides with the axis of the intermediate tube (303).

6. The tubular heat exchanger according to claim 1, characterized in that: A pair of first partitions (105) are installed at one end of the housing (101) at a distance from each other, and a pair of second partitions (104) are installed at the other end at a distance from each other; A heat source inlet channel (107) is formed between a pair of first partitions (105); a cold source outlet channel (103) is formed between the first partitions (105) and the shell (101); A heat source outlet channel (106) is formed between a pair of second partitions (104); a cold source inlet channel (102) is formed between the second partitions (104) and the shell (101).

7. The tubular heat exchanger according to claim 6, characterized in that: The two ends of the intermediate tube (303) and the outer tube (203) extend to the heat source inlet channel (107) and the heat source outlet channel (106), respectively. The two ends of the inner tube (205) extend to the cold source outlet channel (103) and the cold source inlet channel (102), respectively; The two ends of the second channel are connected to the cold source outlet channel (103) and the cold source inlet channel (102) respectively through transition components.

8. The tubular heat exchanger according to claim 7, characterized in that: The transition assembly includes an annular end cap (206) and a branch pipe (204); Among them, the annular end cap (206) is installed at the end of the second channel, and the annular end cap (206) is provided with several through holes; One end of the branch pipe (204) is sealed to the through hole, and the other end of the branch pipe (204) extends to the cold source outlet channel (103) and the cold source inlet channel (102).

9. The tubular heat exchanger according to claim 6, characterized in that: Heat source baffles (108) are installed in the heat source inlet channel (107) and heat source outlet channel (106) so that the heat source flows back and forth in a roughly "S" shape in the tubular heat exchanger.

10. The tubular heat exchanger according to claim 7, characterized in that: Cold source baffles are installed in the cold source outlet channel (103) and cold source inlet channel (102), so that the cold source flows back and forth in a roughly "S" shape in the tubular heat exchanger, and the flow direction of the cold source in the first channel and the second channel is opposite to the flow direction of the heat source in the middle channel.

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