Multi-stream heat exchanger
By designing a multi-stream heat exchanger, using the structure of multiple medium channels and extended pipelines, the problem that existing heat exchangers can only achieve heat exchange of two fluids is solved, and efficient heat exchange between multiple media and Improvement of space efficiency.
Patent Information
- Application Number
- CN202411733809.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-02-18
AI Technical Summary
Existing shell and tube heat exchangers can only achieve heat exchange between two fluids. If heat exchange conditions involving multiple media, multiple heat exchangers are usually required, resulting in large space occupancy and low heat exchange efficiency.
A multi-stream heat exchanger is designed, including a housing, an outer tube bundle, an inner tube bundle and multiple medium channels. By setting the flow directions of different medium channels and expanding pipelines, efficient heat exchange between multiple mediums is achieved.
It realizes efficient heat exchange between multiple media, reduces space occupation and improves heat exchange efficiency.
Smart Images
Figure CN119468749A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of heat exchange equipment, and in particular to a multi-stream heat exchanger. Background Art
[0002] Shell and tube heat exchangers are generally composed of shell, heat transfer tube bundle, tube sheet, baffle and tube box. The shell is mostly cylindrical, with tube bundle inside, and both ends of the tube bundle are fixed on the tube sheet. The two hot and cold fluids for heat exchange, one flows in the heat exchange tube, called tube-side fluid; the other flows outside the heat exchange tube, called shell-side fluid. When in use, the high-temperature medium transfers heat to the tube wall, and then transfers heat to the low-temperature medium through the tube wall.
[0003] However, the current shell and tube heat exchanger can only achieve heat exchange between two fluids. If the heat exchange conditions involve multiple media, multiple heat exchangers are usually required, which have the disadvantages of occupying a large space and low heat exchange efficiency. Summary of the invention
[0004] Technical issues solved:
[0005] In view of the shortcomings of the prior art, the present invention provides a multi-stream heat exchanger to solve the problem mentioned in the above background technology that the current shell and tube heat exchanger can only realize heat exchange between two fluids. If the heat exchange conditions involve multiple media, multiple heat exchangers are usually required, which has the disadvantages of large space occupation and low heat exchange efficiency.
[0006] Technical solution:
[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:
[0008] A multi-stream heat exchanger comprises a shell, wherein a first medium channel is arranged in the shell, a plurality of outer tube bundles are inserted in the first medium channel, both ends of the plurality of outer tube bundles are respectively passed through tube sheets, the tube sheets are welded to the inner wall of the shell, inner tube bundles are installed in the plurality of outer tube bundles, a second medium channel is arranged between the outer tube bundles and the inner tube bundles, a third medium channel is arranged in the plurality of inner tube bundles, the flow directions of the media in the first medium channel and the second medium channel are opposite, and the flow directions of the media in the second medium channel and the third medium channel are opposite.
[0009] In a possible implementation, a plurality of first extension tubes are connected between the plurality of outer tube bundles, and a diameter of the first extension tube is greater than that of the outer tube bundle.
[0010] In a possible implementation, a plurality of second expansion tubes are connected between the plurality of inner tube bundles. The diameter of the second expansion tubes is larger than that of the inner tube bundles. A second expansion channel is provided in the second expansion tubes. The second expansion channel is connected to the third medium channel.
[0011] In a possible implementation, the second extension tube is located inside the first extension tube, a first extension channel exists between the second extension tube and the first extension tube, and the first extension channel is connected to the second medium channel.
[0012] In a possible implementation manner, two ends of the shell have a first medium inlet and a first medium outlet respectively, and the first medium inlet and the first medium outlet are communicated with the first medium channel.
[0013] In a possible implementation, both ends of the shell are respectively connected to first pipe boxes, both ends of the outer tube bundle extend into the two first pipe boxes, and the two first pipe boxes respectively have a second medium inlet and a second medium outlet.
[0014] In a possible implementation, the two first pipe boxes are respectively connected to a second pipe box, both ends of the inner pipe bundle extend into the two second pipe boxes, and the two second pipe boxes respectively have a third medium inlet and a third medium outlet.
[0015] In a possible implementation, the first medium outlet, the second medium inlet and the third medium outlet are on the same side, and the first medium inlet, the second medium outlet and the third medium inlet are on the same side.
[0016] In a possible implementation, a plurality of baffles are arranged at intervals in the shell along the direction of the outer tube bundle, the notches of the baffles are staggered in sequence, and the baffles are arched plates.
[0017] In a possible implementation, brackets are respectively provided at both ends of the bottom of the shell, and drainage pipes are respectively provided at the bottoms of the shell, the first pipe box, and the second pipe box.
[0018] Beneficial effects:
[0019] In the present invention, the flow directions of the media in the first medium channel 13 and the second medium channel 42 are opposite, which can increase the heat exchange efficiency between the medium in the shell 1 and the medium in the outer tube bundle 4, ensuring efficient heat exchange; the flow directions of the media in the second medium channel 42 and the third medium channel 52 are opposite, which can increase the heat exchange efficiency between the medium in the outer tube bundle 4 and the medium in the inner tube bundle 5, ensuring efficient heat exchange.
[0020] In the present invention, the second expansion channel 53 and the first expansion channel 43 can cause the medium to be disturbed during the flow process, thereby increasing the turbulent effect, thereby improving the heat exchange efficiency between the medium in the outer tube bundle 4 and the medium in the inner tube bundle 5, and ensuring efficient heat exchange; the existence of the first expansion tube 41 can reduce the flow rate of the medium in the first medium channel 13, so that the medium in the first medium channel 13 can fully exchange heat with the medium in the second medium channel 42, further improving the cooling efficiency of the oil; the existence of the second expansion tube 51 can reduce the flow rate of the medium in the second medium channel 42, so that the medium in the outer tube bundle 4 can fully exchange heat with the medium in the inner tube bundle 5.
[0021] In the present invention, the baffle 7 can disturb the medium flowing through the first medium channel 13 to increase the heat transfer efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;
[0023] Figure 2 It is a schematic diagram of the internal structure of the present invention;
[0024] Figure 3 for Figure 2 Enlarged view of point A in the middle.
[0025] Legend: 1. Shell; 11. First medium inlet; 12. First medium outlet; 13. First medium channel; 2. First pipe box; 21. Second medium inlet; 22. Second medium outlet; 3. Second pipe box; 31. Third medium inlet; 32. Third medium outlet; 4. Outer tube bundle; 41. First extension tube; 42. Second medium channel; 43. First extension channel; 5. Inner tube bundle; 51. Second extension tube; 52. Third medium channel; 53. Second extension channel; 6. Tube sheet; 7. Baffle; 8. Bracket; 9. Drain pipe. DETAILED DESCRIPTION
[0026] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.
[0027] A multi-stream heat exchanger, see Figure 1-Figure 3 , including a shell 1, and brackets 8 are respectively provided at both ends of the bottom of the shell 1; the effect achieved by the above components is: the bracket 8 is used to support the shell 1.
[0028] As shown in the figure, in this embodiment: a first medium channel 13 is provided in the shell 1, a plurality of outer tube bundles 4 are inserted in the first medium channel 13, and both ends of the plurality of outer tube bundles 4 are respectively passed through the tube sheet 6, and the tube sheet 6 is welded to the inner wall of the shell 1; the effect achieved by the above components is that both ends of the plurality of outer tube bundles 4 are fixed in the first medium channel 13 through the tube sheet 6.
[0029] As shown in the figure, in this embodiment: inner tube bundles 5 are installed in a plurality of outer tube bundles 4, second medium channels 42 exist between the outer tube bundles 4 and the inner tube bundles 5, third medium channels 52 are provided in a plurality of inner tube bundles 5, the flow directions of the media in the first medium channel 13 and the second medium channel 42 are opposite, and the flow directions of the media in the second medium channel 42 and the third medium channel 52 are opposite; the effects achieved by the above components are: the flow directions of the media in the first medium channel 13 and the second medium channel 42 are opposite, which can increase the heat exchange efficiency between the media in the shell 1 and the media in the outer tube bundle 4, and ensure efficient heat exchange; the flow directions of the media in the second medium channel 42 and the third medium channel 52 are opposite, which can increase the heat exchange efficiency between the media in the outer tube bundle 4 and the media in the inner tube bundle 5, and ensure efficient heat exchange.
[0030] As shown in the figure, in this embodiment: a plurality of first extension tubes 41 are connected between the plurality of outer tube bundles 4, the diameter of the first extension tube 41 is larger than that of the outer tube bundle 4, a plurality of second extension tubes 51 are connected between the plurality of inner tube bundles 5, the diameter of the second extension tube 51 is larger than that of the inner tube bundle 5, and the second extension tube 51 is located inside the first extension tube 41; the effect achieved by the above components is: the plurality of inner tube bundles 5 are respectively installed in the outer tube bundle 4.
[0031] As shown in the figure, in this embodiment: a second expansion channel 53 is provided in the second expansion tube 51, and the second expansion channel 53 is communicated with the third medium channel 52; a first expansion channel 43 is provided between the second expansion tube 51 and the first expansion tube 41, and the first expansion channel 43 is communicated with the second medium channel 42; the effects achieved by the above components are: the second expansion channel 53 and the first expansion channel 43 can cause the medium to be disturbed during the flow process, thereby increasing the turbulent effect, thereby improving the heat exchange efficiency between the medium in the outer tube bundle 4 and the medium in the inner tube bundle 5, and ensuring efficient heat exchange; the existence of the first expansion tube 41 can reduce the flow rate of the medium in the first medium channel 13, so that the medium in the first medium channel 13 can fully exchange heat with the medium in the second medium channel 42, further improving the cooling efficiency of the oil; the existence of the second expansion tube 51 can reduce the flow rate of the medium in the second medium channel 42, so that the medium in the outer tube bundle 4 can fully exchange heat with the medium in the inner tube bundle 5.
[0032] As shown in the figure, in this embodiment: the shell 1 has a first medium inlet 11 and a first medium outlet 12 at both ends, and the first medium inlet 11 and the first medium outlet 12 are connected to the first medium channel 13; the effects achieved by the above components are: the medium can be input into the first medium channel 13 through the first medium inlet 11; the first medium outlet 12 can discharge the medium flowing through the first medium channel 13.
[0033] As shown in the figure, in this embodiment: both ends of the shell 1 are respectively connected to the first pipe boxes 2, both ends of the outer tube bundle 4 extend into the two first pipe boxes 2, and the two first pipe boxes 2 respectively have a second medium inlet 21 and a second medium outlet 22; the effects achieved by the above components are: the second medium inlet 21 can input the medium into the second medium channel 42; the second medium outlet 22 can discharge the medium flowing through the second medium channel 42.
[0034] As shown in the figure, in this embodiment: the two first pipe boxes 2 are respectively connected to the second pipe boxes 3, the two ends of the inner pipe bundle 5 extend into the two second pipe boxes 3, and the two second pipe boxes 3 respectively have a third medium inlet 31 and a third medium outlet 32; the effects achieved by the above components are: the third medium inlet 31 can input the medium into the third medium channel 52; the third medium outlet 32 can discharge the medium flowing through the third medium channel 52.
[0035] As shown in the figure, in this embodiment: the first medium outlet 12, the second medium inlet 21 and the third medium outlet 32 are on the same side, and the first medium inlet 11, the second medium outlet 22 and the third medium inlet 31 are on the same side; the effect achieved by the above components is: the above arrangement can make the flow direction of the medium in the first medium channel 13 and the second medium channel 42 opposite, and the flow direction of the medium in the second medium channel 42 and the third medium channel 52 opposite.
[0036] As shown in the figure, in this embodiment: a plurality of baffles 7 are arranged at intervals in the shell 1 along the direction of the outer tube bundle 4, the notches of the baffles 7 are staggered in sequence, the baffles 7 are arched plates, the two ends of the outer tube bundle 4 are respectively penetrated on the tube sheet 6, and the tube sheet 6 is welded and connected to the shell 1; the effects achieved by the above components are: the medium flowing through the first medium channel 13 can be disturbed by the baffles 7 to increase the heat transfer efficiency; the baffles 7 of the arched plates can force the medium to bend and baffle; in addition, the shape of the baffles 7 is not limited to the arched plates, and baffles 7 of other conventional structures can also be used, such as spiral baffles.
[0037] As shown in the figure, in this embodiment: the bottom of the shell 1, the first pipe box 2 and the second pipe box 3 are respectively provided with drainage pipes 9; the effect achieved by the above components is: the three drainage pipes 9 can discharge the accumulated liquid in the shell 1, the first pipe box 2 and the second pipe box 3.
[0038] The specific working process is as follows: the three media enter the first medium channel 13, the second medium channel 42 and the third medium channel 52 through the first medium inlet 11, the second medium inlet 21 and the third medium inlet 31 respectively. The flow directions of the media in the first medium channel 13 and the second medium channel 42 are opposite, which can increase the heat exchange efficiency between the medium in the shell 1 and the medium in the outer tube bundle 4, ensuring efficient heat exchange; the flow directions of the media in the second medium channel 42 and the third medium channel 52 are opposite, which can increase the heat exchange efficiency between the medium in the outer tube bundle 4 and the medium in the inner tube bundle 5, ensuring efficient heat exchange; the second expansion channel 53 and the first expansion channel 43 can cause the medium to be disturbed during the flow process, thereby increasing the turbulent effect; the first expansion tube 41 can reduce the flow rate of the medium in the first medium channel 13, so that the medium in the first medium channel 13 can fully exchange heat with the medium in the second medium channel 42, further improving the cooling efficiency of the oil; the second expansion tube 51 can reduce the flow rate of the medium in the second medium channel 42, so that the medium in the outer tube bundle 4 can fully exchange heat with the medium in the inner tube bundle 5.
[0039] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.
Claims
1. A multi-stream heat exchanger, comprising a shell (1), characterized in that: The shell (1) is provided with a first medium channel (13), a plurality of outer tube bundles (4) are inserted into the first medium channel (13), two ends of the plurality of outer tube bundles (4) are respectively passed through a tube sheet (6), the tube sheet (6) is welded to the inner wall of the shell (1), an inner tube bundle (5) is installed in the plurality of outer tube bundles (4), a second medium channel (42) is provided between the outer tube bundles (4) and the inner tube bundles (5), a third medium channel (52) is provided in the plurality of inner tube bundles (5), the flow directions of the media in the first medium channel (13) and the second medium channel (42) are opposite, and the flow directions of the media in the second medium channel (42) and the third medium channel (52) are opposite.
2. A multi-stream heat exchanger according to claim 1, characterized in that: A plurality of first expansion tubes (41) are connected between the plurality of outer tube bundles (4), and the diameter of the first expansion tubes (41) is greater than that of the outer tube bundles (4).
3. A multi-stream heat exchanger according to claim 2, characterized in that: A plurality of second expansion tubes (51) are connected between the plurality of inner tube bundles (5); the diameter of the second expansion tubes (51) is larger than that of the inner tube bundles (5); a second expansion channel (53) is provided in the second expansion tubes (51); and the second expansion channel (53) is connected to a third medium channel (52).
4. A multi-stream heat exchanger according to claim 3, characterized in that: The second expansion tube (51) is located inside the first expansion tube (41), a first expansion channel (43) exists between the second expansion tube (51) and the first expansion tube (41), and the first expansion channel (43) is connected to the second medium channel (42).
5. A multi-stream heat exchanger according to claim 4, characterized in that: The housing (1) has a first medium inlet (11) and a first medium outlet (12) at both ends, respectively; the first medium inlet (11) and the first medium outlet (12) are connected to a first medium channel (13).
6. A multi-stream heat exchanger according to claim 5, characterized in that: The two ends of the shell (1) are respectively connected to a first pipe box (2), the two ends of the outer pipe bundle (4) extend into the two first pipe boxes (2), and the two first pipe boxes (2) respectively have a second medium inlet (21) and a second medium outlet (22).
7. A multi-stream heat exchanger according to claim 6, characterized in that: The two first pipe boxes (2) are respectively connected to a second pipe box (3), both ends of the inner pipe bundle (5) extend into the two second pipe boxes (3), and the two second pipe boxes (3) respectively have a third medium inlet (31) and a third medium outlet (32).
8. The multi-stream heat exchanger according to claim 7, characterized in that: The first medium outlet (12), the second medium inlet (21) and the third medium outlet (32) are on the same side, and the first medium inlet (11), the second medium outlet (22) and the third medium inlet (31) are on the same side.
9. A multi-stream heat exchanger according to claim 8, characterized in that: A plurality of baffles (7) are arranged at intervals in the shell (1) along the direction of the outer tube bundle (4), the notches of the baffles (7) are arranged in sequence in a staggered manner, and the baffles (7) are arched plates.
10. The multi-stream heat exchanger according to claim 9, characterized in that: Brackets (8) are respectively provided at both ends of the bottom of the shell (1), and drainage pipes (9) are respectively provided at the bottoms of the shell (1), the first pipe box (2) and the second pipe box (3).