Heat exchange device
By designing a buffer member in the heat exchange device, the outer pipe plate is isolated from the heat exchange environment inside the heat exchange shell, the problem of cooling water/steam leakage when the welds of the pipe plate are cracked in the prior art is solved, and higher stability and heat exchange efficiency are achieved.
Patent Information
- Application Number
- CN202421669957.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-07-15
AI Technical Summary
When the pipe plate weld cracks, the cooling water/steam condensate and steam leak into the shell circulating air/hot air, polluting the material and reducing the heat exchange effect, resulting in the need to shut down the machine and replace the air cooler immediately.
A heat exchange device is designed, including a heat exchange case, a heat exchanger and a buffer member. The buffer member has an outer pipe plate, which is isolated from the heat exchange environment inside the heat exchange shell. The outer pipe plate is not affected by the alternation of cold and heat, which improves the firmness of the connection between the outer pipe plate and the heat exchange extension tube. Even if the outer tube plate leaks, the heat exchange medium will only leak in the buffer cavity in the buffer member to prevent contaminated materials from entering the heat exchange shell.
It effectively avoids the leakage of cooling water/steam condensate and steam into the shell circulating air/hot air, pollute materials and reduces heat exchange effect, extends the service life of the pipe plate, and improves the stability and efficiency of the heat exchange device.
Smart Images
Figure CN223021020U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tube-fin heat exchangers, and particularly relates to a heat exchange device. Background Art
[0002] The originally used tube-fin air cooler / heater has single tube sheets on both sides, uses 7-degree water / steam as the refrigerant / heat medium, and cools / warms the circulating air in the shell side.
[0003] When cracks occur in the tube sheet welds, cooling water / steam condensate and steam leak into the circulating air / heat in the shell side, contaminating the material and causing the supply air humidity to be too high, reducing the heat exchange effect; in actual use, when the tube sheet leaks, the air cooler needs to be shut down immediately and replaced to ensure product quality. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a heat exchange device to alleviate the technical problem that when cracks occur in the tube sheet welds in the prior art, cooling water / steam condensate and steam leak into the circulating air / heat in the shell side, contaminating the material.
[0005] The heat exchange device provided by the utility model includes: a heat exchange shell, a heat exchanger, and a buffer member;
[0006] Fresh air is introduced into the heat exchange shell;
[0007] The heat exchanger includes heat exchange tubes and heat exchange extension tubes for the flow of heat exchange media. The heat exchange tubes are arranged in the heat exchange shell, and both ends of the heat exchange tubes are connected to the heat exchange extension tubes;
[0008] The buffer member is connected to the outside of the heat exchange shell. The buffer member has an outer tube sheet, and a buffer cavity is formed between the outer tube sheet and the outer surface of the heat exchange shell;
[0009] The heat exchange extension tube passes through the heat exchange shell and extends into the buffer cavity, and the heat exchange extension tube is connected to the outer tube sheet.
[0010] In an alternative embodiment,
[0011] The buffer member includes a first buffer assembly and a second buffer assembly;
[0012] The first buffer assembly and the second buffer assembly are respectively installed on both sides of the heat exchange shell;
[0013] The heat exchange extension tubes at both ends of the heat exchange tubes are respectively connected to the outer tube sheets of the first buffer assembly and the second buffer assembly.
[0014] In an alternative embodiment,
[0015] The first buffer assembly includes a buffer top plate, a buffer bottom plate, a first buffer side plate, and a second buffer side plate;
[0016] The heat exchange housing has an inner tube plate disposed opposite and spaced from the outer tube plate. The buffer top plate, the buffer bottom plate, the first buffer side plate, the second buffer side plate, the outer tube plate, and the inner tube plate enclose to form the buffer cavity.
[0017] In an alternative embodiment,
[0018] The heat exchange tube includes a liquid inlet branch pipe and a liquid outlet branch pipe;
[0019] The liquid inlet branch pipe and the liquid outlet branch pipe are in communication. The heat exchange medium flows into the liquid inlet branch pipe and flows out from the liquid outlet branch pipe.
[0020] In an alternative embodiment,
[0021] The heat exchange device includes a water inlet distributor;
[0022] The water inlet distributor is in communication with the heat exchange extension pipe at the water inlet end of the liquid inlet branch pipe.
[0023] In an alternative embodiment,
[0024] The heat exchange device further includes an intermediate water collector;
[0025] The heat exchange extension pipe at the water outlet end of the liquid inlet branch pipe and the heat exchange extension pipe at the water inlet end of the liquid outlet branch pipe are both in communication with the intermediate water collector.
[0026] In an alternative embodiment,
[0027] The heat exchange device includes a water outlet collector;
[0028] The water outlet collector is in communication with the heat exchange extension pipe at the water outlet end of the liquid outlet branch pipe.
[0029] In an alternative embodiment,
[0030] Both the water inlet distributor and the water outlet collector are located on the same side of the heat exchange housing, and an inlet and outlet water distribution partition is provided between the water inlet distributor and the water outlet collector.
[0031] In an alternative embodiment,
[0032] The heat exchange device further includes a water inlet pipe and a water outlet pipe; the water inlet pipe is in communication with the water inlet distributor; the water outlet pipe is in communication with the water outlet collector.
[0033] In an alternative embodiment,
[0034] The buffer member is provided with a water drain port, and the water drain port communicates with the buffer chamber.
[0035] The heat exchange device provided by the present utility model improves the connection firmness between the outer tube sheet and the heat exchange extension tube by arranging a buffer member outside the heat exchange housing and having an outer tube sheet on the buffer member, which is isolated from the heat exchange environment inside the heat exchange housing and is not affected by the alternating hot and cold. Even if the outer tube sheet leaks, the heat exchange medium will only leak into the buffer chamber in the buffer member, and the heat exchange medium will not enter the heat exchange housing to contaminate the material and reduce the heat exchange effect, thus alleviating the technical problem in the prior art that when the tube sheet weld cracks, the cooling water / steam condensate and steam leak into the shell-side circulating air / heat, contaminating the material. Description of the Drawings
[0036] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0037] Figure 1 It is a schematic diagram of the overall structure of the heat exchange device provided by the embodiment of the present utility model;
[0038] Figure 2 It is a schematic diagram of the structure of the heat exchange device provided by the embodiment of the present utility model from a side view perspective;
[0039] Figure 3 It is a structural sectional view of the heat exchange device provided by the embodiment of the present utility model from a side view perspective;
[0040] Figure 4 It is a schematic diagram of the structure of the heat exchanger in the heat exchange device provided by the embodiment of the present utility model.
[0041] Reference numerals: 10 - water inlet pipe; 20 - water outlet pipe; 100 - heat exchange housing; 200 - heat exchanger; 210 - liquid inlet branch pipe; 220 - liquid outlet branch pipe; 230 - heat exchange extension tube; 300 - buffer member; 310 - first buffer assembly; 311 - buffer top plate; 312 - buffer bottom plate; 313 - first buffer side plate; 314 - second buffer side plate; 315 - outer tube sheet; 316 - inner tube sheet; 320 - second buffer assembly; 330 - water drain port; 400 - water inlet water distributor; 500 - intermediate water collector; 600 - water outlet water collector; 700 - partition plate between the water inlet and outlet water distributors. Detailed Embodiments
[0042] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative work shall fall within the protection scope of the present utility model.
[0043] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.
[0044] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0045] The following will describe in detail the specific implementation manners of the present utility model in conjunction with the accompanying drawings. It should be understood that the specific implementation manners described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model.
[0046] As Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, wherein, Figure 2 and Figure 3 The side view angles of Figure 1 are based on Figure 2 , that is, Figure 3 and Figure 1 are the side view angles of Figure 2 . The heat exchange device provided in this embodiment includes: a heat exchange housing 100, a heat exchanger 200, and a buffer member 300; the heat exchange housing 100 has a ventilation cylinder,
[0047] The heat exchanger 200 includes heat exchange tubes for the flow of heat exchange medium and heat exchange extension tubes 230. The heat exchange tubes are arranged inside the heat exchange housing 100. Both ends of each heat exchange tube are connected to the heat exchange extension tubes 230, and the heat exchange medium flows through the heat exchange tubes and the heat exchange extension tubes 230.
[0048] The buffer member 300 is connected to the outside of the heat exchange housing 100. The buffer member 300 has an outer tube sheet 315, and a buffer cavity is formed between the outer tube sheet 315 and the outer surface of the heat exchange housing 100; the heat exchange extension tubes 230 pass through the heat exchange housing 100 and extend into the buffer cavity, and the heat exchange extension tubes 230 are connected to the outer tube sheet 315. The heat exchange extension tubes 230 and the outer tube sheet 315 are connected by a method of expanding first and then welding. Even if the connection between the heat exchange extension tubes 230 and the outer tube sheet 315 is welded open, the heat exchange medium will not enter the heat exchange housing 100.
[0049] The heat exchange housing 100 has an inner tube sheet 316 that is spaced opposite to the outer tube sheet 315. The heat exchange extension tubes 230 are sealed with the inner tube sheet 316 using a sheath. The distance between the inner tube sheet 316 and the outer tube sheet 315 is about 15 cm.
[0050] In the heat exchange device provided in this embodiment, by providing the buffer member 300 outside the heat exchange housing 100, and the buffer member 300 has an outer tube sheet 315, the outer tube sheet 315 is isolated from the heat exchange environment inside the heat exchange housing 100, and the outer tube sheet 315 is not affected by the cold and heat alternation, improving the connection firmness between the outer tube sheet 315 and the heat exchange extension tubes 230. Even if the outer tube sheet 315 leaks, the heat exchange medium will only leak into the buffer cavity inside the buffer member 300, and the heat exchange medium will not enter the heat exchange housing 100 to contaminate the material and reduce the heat exchange effect, alleviating the technical problem in the prior art that when the tube sheet weld cracks, the cooling water / steam condensate and steam leak into the shell-side circulating air / thermal air, contaminating the material.
[0051] Based on the above embodiment, in an optional implementation manner, the buffer member 300 in the heat exchange device provided in this embodiment includes a first buffer assembly 310 and a second buffer assembly 320; the first buffer assembly 310 and the second buffer assembly 320 are respectively installed on both sides of the heat exchange housing 100. The heat exchange extension tubes 230 at both ends of the heat exchange tubes are respectively connected to the outer tube sheets 315 of the first buffer assembly 310 and the second buffer assembly 320, so that the heat exchange extension tubes 230 at both ends of the heat exchange tubes are respectively provided with the first buffer assembly 310 and the second buffer assembly 320, and the outer tube sheets 315 at both ends of the heat exchange tubes are isolated and no longer affected by the cold and heat alternation.
[0052] In an alternative embodiment, the first buffer assembly 310 includes a buffer top plate 311, a buffer bottom plate 312, a first buffer side plate 313, and a second buffer side plate 314; the buffer top plate 311, the buffer bottom plate 312, the first buffer side plate 313, the second buffer side plate 314, an outer tube plate 315, and an inner tube plate 316 enclose to form a buffer chamber. When the outer tube plate 315 leaks, the heat exchange medium enters the buffer chamber.
[0053] In addition, in an alternative embodiment, the buffer member 300 is provided with a drain port 330, and the drain port 330 communicates with the buffer chamber. Specifically, the drain port 330 is provided on the buffer bottom plate 312, and a drain valve is provided on the drain port 330, which facilitates the discharge of the heat exchange medium in the buffer chamber. At the same time, it reduces the large amount of fresh air overflowing at the connection between the inner tube plate 316 and the heat exchange tube. Since the opening degree of the drain valve is controllable, the air volume loss caused by insufficient air volume can be reduced.
[0054] In an alternative embodiment, the heat exchange tube includes a liquid inlet branch pipe 210 and a liquid outlet branch pipe 220; the liquid inlet branch pipe 210 and the liquid outlet branch pipe 220 are connected, and the heat exchange medium flows into the liquid inlet branch pipe 210 and flows out from the liquid outlet branch pipe 220.
[0055] It should be noted that the liquid inlet branch pipe 210 and the liquid outlet branch pipe 220 have the same structure, but different arrangement positions. The liquid inlet branch pipe 210 is closer to the liquid inlet side, and the liquid outlet branch pipe 220 is closer to the liquid outlet side. The external heat exchange medium first enters the liquid inlet branch pipe 210 and then flows out from the liquid outlet branch pipe 220.
[0056] In an alternative embodiment, the heat exchange device includes a water inlet distributor 400; the water inlet distributor 400 is connected to the heat exchange extension pipe 230 at the water inlet end of the liquid inlet branch pipe 210.
[0057] Specifically, the water inlet distributor 400 is installed on the heat exchange housing 100, and the water inlet distributor 400 is located on the heat exchange medium inlet side of the heat exchange housing 100. The external heat exchange medium enters each liquid inlet branch pipe 210 through the water inlet distributor 400.
[0058] In an alternative embodiment, the heat exchange device further includes an intermediate water collector 500; the heat exchange extension pipe 230 at the water outlet end of the liquid inlet branch pipe 210 and the heat exchange extension pipe 230 at the water inlet end of the liquid outlet branch pipe 220 are both connected to the intermediate water collector 500.
[0059] Specifically, the intermediate water collector 500 is installed on the heat exchange housing 100, and the intermediate water collector 500 is located on the side away from the water inlet distributor 400. The heat exchange medium flowing out from the liquid inlet branch pipe 210 enters the intermediate water collector 500, and the heat exchange medium is conveyed to the liquid outlet branch pipe 220 through the intermediate water collector 500.
[0060] In an alternative embodiment, the heat exchange device includes a water outlet header 600; the water outlet header 600 is communicated with a heat exchange extension pipe 230 at the water outlet end of the liquid outlet branch pipe 220.
[0061] Specifically, the water outlet header 600 is installed on the heat exchange housing 100, and the heat exchange medium in the liquid outlet branch pipe 220 flows into the water outlet header 600, and the heat exchange medium is discharged outside through the water outlet header 600.
[0062] In an alternative embodiment, both the water inlet header 400 and the water outlet header 600 are located on the same side of the heat exchange housing 100, and a water inlet and outlet header partition 700 is provided between the water inlet header 400 and the water outlet header 600.
[0063] Specifically, the water inlet header 400 and the water outlet header 600 are separated by welding through the water inlet and outlet header partition 700 to ensure the separation of the inlet water and the outlet water. The water in the water outlet header 600 is connected to the required subsequent process pipeline through a quick connector via the water outlet pipe 20.
[0064] In an alternative embodiment, the heat exchange device further includes a water inlet pipe 10 and a water outlet pipe 20; the water inlet pipe 10 is communicated with the water inlet header 400, and a quick connector is provided on the water inlet pipe 10 for facilitating connection with an external pipeline, and an external heat exchange medium enters through the water inlet pipe 10.
[0065] The water outlet pipe 20 is communicated with the water outlet header 600, and the heat exchange medium flows out through the water outlet pipe 20.
[0066] For the heat exchange device provided in this embodiment, the heat exchange medium flows inside the heat exchange tubes to achieve the cooling / heating effect of fresh air. Its working principle mainly includes: the circulating air for alkali cellulose pneumatic conveying enters the heat exchange housing 100 and exchanges heat with the refrigerant in the heat exchange tubes inside the heat exchange housing 100, so that the circulating air changes from a high-temperature and high-pressure state to a low-temperature and low-pressure state, thereby achieving the cooling effect. It can also be used as an air heating device for sodium sulfate drying. After the fresh air exchanges heat with the steam in the heat exchange tubes inside the air heater, the fresh air changes from normal temperature to hot air at high temperature and high pressure to dry the sodium sulfate.
[0067] Since the fresh air is isolated from the heat exchange medium, the outer tube sheet 315 is less affected by the alternating hot and cold, and the service life of the tube sheet weld is improved; even if the outer tube sheet 315 leaks, the heat exchange medium will not leak into the fresh air to contaminate the material and reduce the heat exchange effect.
[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A heat exchange device, characterized in that: It comprises: a heat exchange shell (100), a heat exchanger (200) and a buffer component (300); Fresh air is introduced into the heat exchange shell (100); The heat exchanger (200) comprises a heat exchange tube and a heat exchange extension tube (230) for allowing a heat exchange medium to flow, the heat exchange tube being arranged in the heat exchange shell (100), and both ends of the heat exchange tube being connected to the heat exchange extension tube (230); The buffer component (300) is connected to the outside of the heat exchange shell (100), and the buffer component (300) has an outer tube sheet (315), and a buffer cavity is formed between the outer tube sheet (315) and the outer surface of the heat exchange shell (100); The heat exchange extension tube (230) passes through the heat exchange shell (100) and extends into the buffer cavity, and the heat exchange extension tube (230) is connected to the outer tube plate (315).
2. The heat exchange device according to claim 1, characterized in that: The buffer member (300) comprises a first buffer component (310) and a second buffer component (320); The first buffer assembly (310) and the second buffer assembly (320) are respectively installed on two sides of the heat exchange shell (100); The heat exchange extension tubes (230) located at both ends of the heat exchange tube are respectively connected to the outer tube sheets (315) of the first buffer assembly (310) and the second buffer assembly (320).
3. The heat exchange device according to claim 2, characterized in that: The first buffer assembly (310) comprises a buffer top plate (311), a buffer bottom plate (312), a first buffer side plate (313) and a second buffer side plate (314); The heat exchange shell (100) has an inner tube plate (316) arranged opposite to the outer tube plate (315) at a distance, and the buffer top plate (311), the buffer bottom plate (312), the first buffer side plate (313), the second buffer side plate (314), the outer tube plate (315) and the inner tube plate (316) are arranged to form the buffer cavity.
4. The heat exchange device according to claim 1, characterized in that: The heat exchange tube comprises a liquid inlet branch pipe (210) and a liquid outlet branch pipe (220); The liquid inlet branch pipe (210) and the liquid outlet branch pipe (220) are connected, and the heat exchange medium flows into the liquid inlet branch pipe (210) and flows out from the liquid outlet branch pipe (220).
5. The heat exchange device according to claim 4, characterized in that: The heat exchange device comprises a water inlet manifold (400); The water inlet manifold (400) is in communication with the heat exchange extension pipe (230) at the water inlet end of the liquid inlet branch pipe (210).
6. The heat exchange device according to claim 5, characterized in that: The heat exchange device also includes an intermediate water collector (500); The heat exchange extension pipe (230) at the water outlet end of the liquid inlet branch pipe (210) and the heat exchange extension pipe (230) at the water inlet end of the liquid outlet branch pipe (220) are both in communication with the intermediate water collector (500).
7. The heat exchange device according to claim 6, characterized in that: The heat exchange device comprises a water outlet manifold (600); The water outlet manifold (600) is in communication with the heat exchange extension pipe (230) at the water outlet end of the liquid outlet branch pipe (220).
8. The heat exchange device according to claim 7, characterized in that: The water inlet manifold (400) and the water outlet manifold (600) are both located on the same side of the heat exchange shell (100), and an inlet and outlet manifold partition (700) is provided between the water inlet manifold (400) and the water outlet manifold (600).
9. The heat exchange device according to claim 8, characterized in that: The heat exchange device further comprises a water inlet pipe (10) and a water outlet pipe (20); the water inlet pipe (10) is in communication with the water inlet manifold (400); and the water outlet pipe (20) is in communication with the water outlet manifold (600).
10. The heat exchange device according to claim 1, characterized in that: The buffer component (300) is provided with a hydrophobic port (330), and the hydrophobic port (330) is communicated with the buffer cavity.