CN221444901U - Stress-free heat exchanger - Google Patents
Stress-free heat exchanger Download PDFInfo
- Publication number
- CN221444901U CN221444901U CN202323196640.8U CN202323196640U CN221444901U CN 221444901 U CN221444901 U CN 221444901U CN 202323196640 U CN202323196640 U CN 202323196640U CN 221444901 U CN221444901 U CN 221444901U
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- side medium
- area
- tube side
- heat exchange
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- 239000011148 porous material Substances 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 8
- 230000008646 thermal stress Effects 0.000 abstract description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 9
- 239000003546 flue gas Substances 0.000 description 9
- 239000012530 fluid Substances 0.000 description 5
- 238000012546 transfer Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model discloses a stress-free heat exchanger which comprises a tube side medium inlet area, a tube side medium moving area, a heat exchange area, an inner tube and an outer tube. The tube side medium entering area, the tube side medium moving area and the heat exchange area are sequentially arranged from top to bottom; the inner tube is positioned in the outer tube, the inner tube and the outer tube are of sleeve type structures, a gap is reserved between the tube walls of the inner tube and the outer tube, and the inner tube and the outer tube are distributed in the heat exchange area; the lower end of the outer tube is closed, and the upper end of the outer tube is open and is communicated with the tube side medium moving area; the lower end of the inner pipe is open and is not contacted with the bottom of the outer pipe, and the upper end of the inner pipe is open and penetrates through the tube side medium moving area and is communicated with the tube side medium entering area. Compared with the prior art, the inner pipe and the outer pipe of the heat exchanger can be horizontally placed or vertically placed, the end part far away from the tube side medium entering area is in a free state, thermal stress fatigue can not be generated, and the reliability of equipment is greatly improved.
Description
Technical Field
The utility model belongs to the technical field of heat exchangers, and particularly relates to a stress-free heat exchanger.
Background
The heat exchanger is energy-saving equipment for realizing heat transfer between two or more fluids with different temperatures, and heat is transferred to fluid with lower temperature by fluid with higher temperature, so that the temperature of the fluid reaches the index specified by the flow, thereby meeting the requirements of process conditions and being one of main equipment for improving the energy utilization rate. The heat exchanger industry relates to more than 30 industries such as heating ventilation, pressure vessels, chemical industry, petroleum industry and the like, and mutually forms an industry chain. The heat exchanger is suitable for heat exchangers with different media, different working conditions, different temperatures and different pressures, is different in structural type and classified according to a heat transfer principle, and comprises a division type heat exchanger, a heat accumulating type heat exchanger, a fluid connection indirect heat exchanger, a hybrid heat exchanger and the like. The heat exchanger can be divided into a floating head type heat exchanger, a fixed tube plate type heat exchanger, a U-shaped tube plate type heat exchanger, a heat pipe heat exchanger and the like according to the structure.
The existing heat exchanger has a certain result in the aspects of saving energy, improving efficiency of heat transfer, reducing heat transfer area, reducing pressure drop, improving heat intensity of the device and the like. However, there are still problems such as tearing of equipment weld joints, poor reliability, etc. caused by thermal stress fatigue of the heat exchange element due to limited expansion under high temperature heat exchange conditions.
Disclosure of utility model
The utility model aims to: aiming at the defects of the prior art, the utility model provides the stress-free heat exchanger which has high heat exchange efficiency and is designed to be stress-free and has high reliability.
The technical scheme is as follows: in order to achieve the above purpose, the utility model adopts the following technical scheme:
The stress-free heat exchanger comprises a tube side medium entering area, a tube side medium moving area, a heat exchange area, an inner tube and an outer tube, wherein the tube side medium entering area, the tube side medium moving area and the heat exchange area are sequentially arranged from top to bottom; the inner tube is positioned in the outer tube, the inner tube and the outer tube are of sleeve type structures, a gap is reserved between the tube walls of the inner tube and the outer tube, and the inner tube and the outer tube are distributed in the heat exchange area; the lower end of the outer tube is closed, the upper end of the outer tube is open and is communicated with the tube side medium moving area, the lower end of the inner tube is open and is not contacted with the bottom of the outer tube, and the upper end of the inner tube is open and penetrates through the tube side medium moving area and is communicated with the tube side medium entering area.
As a specific implementation scheme, the top of the tube side medium inlet area is provided with a tube side medium inlet, and the side wall of the tube side medium moving area is provided with a tube side medium outlet; two side walls of the heat exchange area are provided with a shell side medium inlet and a shell side medium outlet; the heat exchange area is a shell side medium flow area.
As a specific embodiment, the top of the tube side medium moving area is an upper pore plate, the upper pore plate is provided with an opening, and the upper end of the inner tube is in sealing connection with the opening to realize the communication with the tube side medium entering area.
As a specific implementation scheme, the bottom of the tube side medium moving area is a lower pore plate, the lower pore plate is provided with an opening, and the upper end of the outer tube is in sealing connection with the opening to realize communication with the tube side medium moving area.
As a preferable scheme, the inner tube and the outer tube are of concentric coaxial sleeve type structures, are vertically distributed in the heat exchange area, and are provided with a plurality of groups in parallel; the concentric coaxial sleeve structure formed by the inner tube and the outer tube is arranged in a parallel (rectangular arrangement) or a fork (triangular arrangement) mode.
As an improvement, the heat exchanger further comprises a tube side medium discharge area and an additional heat exchange area, wherein the tube side medium discharge area is positioned above a tube side medium moving area of the additional heat exchange area and is arranged adjacent to the tube side medium inlet area, and the additional heat exchange area is positioned below the tube side medium moving area and is arranged adjacent to the heat exchange area; the additional heat exchange area is internally provided with an inner pipe and an outer pipe which are arranged in the same way as in the heat exchange area, wherein the upper end of the inner pipe is opened and penetrates through the tube side medium moving area to be communicated with the tube side medium discharging area.
As a specific implementation scheme, the top of the tube side medium inlet area is provided with a tube side medium inlet, and the top of the tube side medium outlet area is provided with a tube side medium upper outlet; the side wall of the additional heat exchange area is provided with a shell side medium inlet, and the side wall of the heat exchange area is provided with a shell side medium outlet; the additional heat exchange area and the heat exchange area are shell side medium flow areas.
As a specific embodiment, the top of the tube side medium moving area is an upper pore plate, the upper pore plate is provided with an opening, and the upper end of the inner tube is in sealing connection with the opening to realize the communication with the tube side medium entering area and the tube side medium discharging area.
As a specific implementation scheme, the bottom of the tube side medium moving area is a lower pore plate, the lower pore plate is provided with an opening, and the upper end of the outer tube is in sealing connection with the opening to realize communication with the tube side medium moving area.
As a preferable scheme, the inner tube and the outer tube are of concentric coaxial sleeve type structures, are vertically distributed in the heat exchange area and the additional heat exchange area, and are parallelly provided with a plurality of groups; the concentric coaxial sleeve structure formed by the inner tube and the outer tube is arranged in a parallel (rectangular arrangement) or a fork (triangular arrangement) mode.
The beneficial effects are that: compared with the prior art, the heat exchanger improves the heat exchange efficiency through the design of the concentric sleeve. Meanwhile, the inner tube and the outer tube can be horizontally placed or vertically placed, the upper ends of the inner tube and the outer tube of the concentric sleeve are respectively connected and fixed with the end hole plate, and the lower ends of the inner tube and the outer tube of the concentric sleeve are of free expansion structures, so that the heat exchange element is particularly suitable for high-temperature heat exchange conditions, and thermal stress fatigue cannot be generated due to expansion limitation, and the reliability of equipment is greatly improved.
Drawings
Fig. 1 is a schematic view of the heat exchanger of embodiment 1.
Fig. 2 is a schematic view of the heat exchanger of embodiment 2.
Fig. 3 is a schematic view (cross-sectional view) of the arrangement of the sleeve structure in the heat exchange zone in the heat exchanger.
Detailed Description
The utility model is further described below in connection with the drawings, but is not intended to limit the scope of the utility model. Modifications and substitutions of the structure of the present utility model without departing from the spirit and essence of the utility model are all within the scope of the present utility model.
In the description of the present utility model, it should be understood that, if any, terms such as "upper," "lower," "left," "right," "top," "bottom," "inner," "outer," and the like indicate an orientation or a positional relationship based on that shown in the drawings, only for convenience in describing the present utility model and simplifying the description, but do not indicate or imply that the devices or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus the words describing the positional relationship in the drawings are merely for illustration and not to be construed as limiting the present patent.
Example 1
The stress-free heat exchanger comprises a tube side medium inlet area 1, a tube side medium moving area 2, a heat exchange area 3, an inner tube 4 and an outer tube 5, wherein the tube side medium inlet area 1, the tube side medium moving area 2 and the heat exchange area 3 are sequentially arranged from top to bottom, and each area is formed by dividing a shell.
The top of the tube side medium entering area 1 is provided with a tube side medium inlet 101, and the side wall of the tube side medium moving area 2 is provided with a tube side medium outlet 201; the two side walls of the heat exchange area 3 are provided with a shell side medium inlet and a shell side medium outlet.
The inner tube 4 is positioned in the outer tube 5, the inner tube 4 and the outer tube are of concentric coaxial sleeve type structures, gaps are reserved between the walls of the inner tube and the outer tube, the inner tube 4 and the outer tube 5 are vertically distributed in the heat exchange area 3, and a plurality of groups are arranged in parallel. The lower end of the outer tube 5 is closed, the upper end of the outer tube is open and is communicated with the tube side medium moving area 2, the lower end of the inner tube 4 is open and is not contacted with the bottom of the outer tube 5, and the upper end of the inner tube is open and penetrates through the tube side medium moving area 2 and is communicated with the tube side medium entering area 1. The concentric coaxial sleeve structure formed by the inner tube 4 and the outer tube 5 can be arranged in a straight row (rectangular arrangement) or a fork row (triangular arrangement) as shown in fig. 3.
The top of the tube side medium moving area 2 is provided with an upper pore plate 202, the upper pore plate 202 is provided with an opening, and the upper end of the inner tube 4 is in sealing connection with the opening to realize the communication with the tube side medium entering area 1.
The bottom of the tube side medium moving area 2 is provided with a lower orifice plate 203, the lower orifice plate 203 is provided with an opening, and the upper end of the outer tube 5 is in sealing connection with the opening to realize communication with the tube side medium moving area 2.
In the heat exchanger, when the flue gas (shell side medium) and air (tube side medium) exchange heat, and the hot flue gas enters the heat exchange area 3, the tube wall of the outer tube 5 is a heat exchange wall surface between the cold air and the hot flue gas, the cold air enters the tube side medium entering area 1 from the tube side medium inlet 101, then enters the inner tube 4 through the upper end opening of the inner tube 4 in the heat exchange area 3, enters the gap between two tube walls in the outer tube 5 through the lower end opening of the inner tube 4, then exchanges heat with the external hot flue gas through the tube wall of the outer tube 5, and the heat absorbed air enters the tube side medium moving area 2 through the upper end opening of the outer tube 5, and finally is discharged through the tube side medium outlet 201 after horizontally moving.
Example 2
The unstressed heat exchanger comprises a tube side medium inlet area 1, a tube side medium moving area 2, a heat exchange area 3, an inner tube 4, an outer tube 5, a tube side medium outlet area 6 and an additional heat exchange area 7 as shown in figure 2. The tube side medium entering area 1, the tube side medium moving area 2 and the heat exchange area 3 are sequentially arranged from top to bottom, the tube side medium discharging area 6 is located above the tube side medium moving area 2 of the additional heat exchange area 7, is arranged adjacent to the tube side medium entering area 1, the additional heat exchange area 7 is located below the tube side medium moving area 2, is arranged adjacent to the heat exchange area 3, and is formed by dividing a shell.
The top of the tube side medium inlet area 1 is provided with a tube side medium inlet 101, and the top of the tube side medium outlet area 6 is provided with a tube side medium upper outlet 601; the side wall of the additional heat exchange area 7 is provided with a shell side medium inlet, and the side wall of the heat exchange area 3 is provided with a shell side medium outlet.
The inner tube 4 is positioned in the outer tube 5, the inner tube 4 and the outer tube are of concentric coaxial sleeve type structures, gaps are reserved between the walls of the inner tube and the outer tube, the inner tube 4 and the outer tube 5 are vertically distributed in the heat exchange area 3 and the additional heat exchange area 7, and a plurality of groups are arranged in parallel. The lower end of the outer tube 5 is closed, the upper end of the outer tube is open and is communicated with the tube side medium moving area 2, the lower end of the inner tube 4 is open and is not contacted with the bottom of the outer tube 5, the upper end of the inner tube is open and penetrates through the tube side medium moving area 2 and is communicated with the tube side medium entering area 1 and the tube side medium discharging area 6. The concentric coaxial sleeve structure formed by the inner tube 4 and the outer tube 5 can be arranged in a straight row (rectangular arrangement) or a fork row (triangular arrangement) as shown in fig. 3.
The top of the tube side medium moving area 2 is provided with an upper pore plate 202, the upper pore plate 202 is provided with an opening, and the upper end of the inner tube 4 is in sealing connection with the opening to realize communication with the tube side medium entering area 1 and the tube side medium discharging area 6.
The bottom of the tube side medium moving area 2 is provided with a lower orifice plate 203, the lower orifice plate 203 is provided with an opening, and the upper end of the outer tube 5 is in sealing connection with the opening to realize communication with the tube side medium moving area 2.
In the above heat exchanger, when the flue gas (shell side medium) and air (tube side medium) exchange heat, the hot flue gas enters the heat exchange area 3 and the additional heat exchange area 7, the tube wall of the outer tube 5 is a heat exchange surface between the cold air and the hot flue gas, at this time, the cold air enters the tube side medium entering area 1 from the tube side medium inlet 101, then enters the inner tube 4 through the upper end opening of the inner tube 4 in the heat exchange area 3, then enters the gap between two tube walls in the outer tube 5 through the lower end opening of the inner tube 4, then exchanges heat with the external hot flue gas through the tube wall of the outer tube 5, and enters the tube side medium moving area 2 through the upper end opening of the outer tube 5, after the heat absorption, reaches the additional heat exchange area 7, then enters the outer tube 5 through the upper end opening of the outer tube 5, at this time, can continue to exchange heat with the external hot flue gas, after the heat absorption, reaches the bottom of the outer tube 5, then enters the inner tube 4, then enters the tube side medium discharging area 6 through the upper end opening, and finally is discharged through the upper outlet 601 of the tube side medium.
While the utility model has been described in detail in the foregoing general description and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the utility model and are intended to be within the scope of the utility model as claimed.
Claims (10)
1. The stress-free heat exchanger is characterized by comprising a tube side medium entering area (1), a tube side medium moving area (2), a heat exchange area (3), an inner tube (4) and an outer tube (5), wherein the tube side medium entering area (1), the tube side medium moving area (2) and the heat exchange area (3) are sequentially arranged from top to bottom; the inner tube (4) is positioned in the outer tube (5), the inner tube (4) and the outer tube (5) are of sleeve type structures, a gap is reserved between the tube walls of the inner tube and the outer tube, and the inner tube (4) and the outer tube (5) are distributed in the heat exchange area (3); the lower end of the outer tube (5) is closed, and the upper end of the outer tube is open and is communicated with the tube side medium moving area (2); the lower end of the inner tube (4) is open and is not contacted with the bottom of the outer tube (5), and the upper end of the inner tube is open and penetrates through the tube side medium moving area (2) and is communicated with the tube side medium entering area (1).
2. The stress-free heat exchanger according to claim 1, wherein a tube side medium inlet (101) is arranged at the top of the tube side medium inlet area (1), and a tube side medium outlet (201) is arranged on the side wall of the tube side medium moving area (2); two side walls of the heat exchange area (3) are provided with a shell side medium inlet and a shell side medium outlet.
3. The stress-free heat exchanger according to claim 1, wherein the top of the tube side medium moving area (2) is an upper pore plate (202), an opening is arranged on the surface of the upper pore plate (202), and the upper end of the inner tube (4) is in sealing connection with the opening to realize communication with the tube side medium entering area (1).
4. The stress-free heat exchanger according to claim 1, wherein the bottom of the tube side medium moving area (2) is a lower orifice plate (203), an opening is formed in the surface of the lower orifice plate (203), and the upper end of the outer tube (5) is in sealing connection with the opening to realize communication with the tube side medium moving area (2).
5. The stress-free heat exchanger according to claim 1, wherein the inner tube (4) and the outer tube (5) are concentric coaxial sleeve structures, vertically distributed in the heat exchange area (3), and arranged in parallel in several groups; the concentric coaxial sleeve structure formed by the inner tube (4) and the outer tube (5) is arranged in a parallel or a fork way.
6. The stress free heat exchanger according to claim 1, further comprising a tube side medium drain region (6) and an additional heat exchange region (7), the tube side medium drain region (6) being located above the tube side medium moving region (2) of the additional heat exchange region (7), being located adjacent to the tube side medium entry region (1), the additional heat exchange region (7) being located below the tube side medium moving region (2), being located adjacent to the heat exchange region (3); the inner tube (4) and the outer tube (5) are equally distributed in the additional heat exchange area (7), the arrangement of the inner tube (4) and the outer tube (5) is the same as that in the heat exchange area (3), wherein the upper end of the inner tube (4) is opened and penetrates through the tube side medium moving area (2) to be communicated with the tube side medium discharging area (6).
7. The stress-free heat exchanger according to claim 6, wherein the top of the tube side medium inlet zone (1) is provided with a tube side medium upper inlet (101), and the top of the tube side medium outlet zone (6) is provided with a tube side medium upper outlet (601); the side wall of the additional heat exchange area (7) is provided with a shell side medium inlet, and the side wall of the heat exchange area (3) is provided with a shell side medium outlet.
8. The stress-free heat exchanger according to claim 6, wherein the top of the tube side medium moving area (2) is an upper orifice plate (202), the upper orifice plate (202) is provided with an opening, and the upper end of the inner tube (4) is in sealing connection with the opening to realize communication with the tube side medium entering area (1) and the tube side medium discharging area (6).
9. The stress-free heat exchanger according to claim 6, wherein the bottom of the tube side medium moving area (2) is a lower orifice plate (203), the lower orifice plate (203) is provided with an opening, and the upper end of the outer tube (5) is in sealing connection with the opening to realize communication with the tube side medium moving area (2).
10. The non-stress heat exchanger according to claim 6, wherein the inner tube (4) and the outer tube (5) are concentric coaxial sleeve structures, vertically distributed in the heat exchange area (3) and the additional heat exchange area (7), and are arranged in parallel in several groups; the concentric coaxial sleeve structure formed by the inner tube (4) and the outer tube (5) is arranged in a parallel or a fork way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323196640.8U CN221444901U (en) | 2023-11-24 | 2023-11-24 | Stress-free heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323196640.8U CN221444901U (en) | 2023-11-24 | 2023-11-24 | Stress-free heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221444901U true CN221444901U (en) | 2024-07-30 |
Family
ID=92057328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323196640.8U Active CN221444901U (en) | 2023-11-24 | 2023-11-24 | Stress-free heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221444901U (en) |
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2023
- 2023-11-24 CN CN202323196640.8U patent/CN221444901U/en active Active
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