Heat exchanger tube box structure
By adopting a combination of multi-pipe chamber and sub-pipe partition in the heat exchanger tube box structure, heat transfer is reduced and fluid turbulence is promoted, the problem of steam temperature drop of existing dual-pipe heat exchangers is solved, and the problem of achieving the More efficient heat exchange and longer service life.
Patent Information
- Application Number
- CN202420461727.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-11
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-03-11
AI Technical Summary
During the steam heating process of existing dual-pipe heat exchangers, the steam temperature drops due to the heat transfer of the partition, and the heat exchange efficiency is not high.
A heat exchanger tube box structure is designed, adopting a combination of multi-pipe chamber and sub-pipe partition. By setting interlayer gaps and wavy spacers on the sub-pipe partition, heat transfer between different pipe paths is reduced. , and a wave shape is provided on the deflector to promote fluid turbulence.
Multiple heat exchanges have been achieved, the heat exchange efficiency has been improved, the heat transfer has been reduced, and the service life of the heat exchanger has been extended.
Smart Images
Figure CN222528426U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of heat exchangers, in particular to a heat exchanger tube box structure. Background Art
[0002] A heat exchanger is a device used to transfer heat between two or more fluids. It has a tube-side structure and a shell-side structure inside to pass different fluids and achieve heat exchange.
[0003] For example, patent CN210242504U discloses a high-safety steam heater, which is essentially a double-pass heat exchanger, wherein steam enters the first air chamber along the inlet and is discharged along the steam outlet on the second air chamber after heat exchange in the heat exchange unit. During this period, the steam is heated once, and the steam temperature in the second air chamber is significantly higher than the steam temperature in the first air chamber, which can better complete the steam heat exchange action. However, the first air chamber and the second air chamber are separated by only a group of metal partitions, which can easily cause the temperature of the heated steam in the second air chamber to drop due to heat transfer. In view of this, improvements need to be proposed. Utility Model Content
[0004] The utility model aims to overcome the disadvantages of the background technology and provide a heat exchanger tube box structure.
[0005] The embodiments of the present invention are implemented by the following technical solutions:
[0006] A heat exchanger tube box structure includes a multi-tube chamber with a group of positioning tubes and multiple groups of pass partitions, multiple groups of pass partitions are arranged in a circular array around the axis of the positioning tube in the multi-tube chamber, each group of the pass partitions includes two groups of partitions, and a gap is left between the two groups of partitions to reduce heat transfer between adjacent tubes in the multi-tube chamber.
[0007] Furthermore, on any cross section perpendicular to the axis of the positioning tube, the cross-sectional profile of the partition is wavy, and the partition is connected between the outer wall of the positioning tube and the inner wall of the multi-tube chamber.
[0008] Furthermore, in each group of the partition plates, the inner side surfaces of the two groups of the partition plates are arranged opposite to each other, and the outer side surfaces of the two groups of the partition plates are also provided with guide plates to make the fluid in the multi-pass chamber turbulent.
[0009] Furthermore, in the axial direction of the positioning tube, the guide plate is arranged to extend in a wave shape.
[0010] Furthermore, the multi-tube-pass chamber is surrounded by a cylinder shell, a tube sheet arranged at one end of the cylinder shell and a head arranged at the other end of the cylinder shell; the multiple sets of pass partitions are welded to the inner walls of the cylinder shell and the head, and the multiple sets of pass partitions are all inserted into the end surface of the tube sheet.
[0011] Furthermore, a slot for inserting the partition plate is provided on the tube plate, and a sealing gasket is provided between the slot and the partition plate.
[0012] Furthermore, the tube sheet and the cylinder shell are detachably connected via a flange.
[0013] Furthermore, the multi-pass chamber is a three-pass chamber, a four-pass chamber or a five-pass chamber.
[0014] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:
[0015] The heat exchanger tube box structure of the utility model adopts a multi-tube-pass structure, so that the tube-side fluid and the shell-side fluid can achieve multiple heat exchanges, and the heat exchange effect is better. In addition, different chambers in the multi-tube-pass chamber are isolated by a partition plate with an interlayer gap, which reduces the heat transfer between different tube passes caused by the partition plate and improves the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 The internal structure of the heat exchanger tube box structure of the utility model is shown in FIG. Figure 1 ;
[0017] Figure 2 for Figure 1 BB surface cross-sectional view;
[0018] Figure 3 for Figure 1 CC section view;
[0019] Figure 4 The internal structure of the exchanger tube box structure of the utility model is shown in FIG. Figure 2 ;
[0020] Icons: 1-multi-pass chamber, 10-shell, 11-head, 110-outlet, 111-inlet, 12-tube sheet, 120-sealing gasket, 13-flange, 14-positioning tube, 2-pass partition, 20-spacer, 21-gap, 3-guide plate. DETAILED DESCRIPTION
[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0022] Reference Figures 1 to 4 The utility model discloses a heat exchanger tube box structure, including a multi-tube chamber 1, wherein the multi-tube chamber 1 is surrounded by a cylinder shell 10, a tube sheet 12 arranged at one end of the cylinder shell 10 and a head 11 arranged at the other end of the cylinder shell 10, the cylinder shell 10 is welded to the tube sheet 11, and the cylinder shell 10 and the tube sheet 12 are detachably connected through a flange 13.
[0023] A group of positioning tubes 14 are arranged on the central axis of the multi-pass chamber 1, and a plurality of groups of partition plates 2 are arranged around the positioning tube 14. The plurality of partition plates 2 are arranged in a circular array in the multi-pass chamber 1, that is, the multi-pass chamber 1 can be a three-pass chamber, a four-pass chamber or a five-pass chamber, etc. In this embodiment, a four-pass chamber is used.
[0024] Reference Figures 1 to 4 Each set of partition plates 2 is welded to the inner wall of the cylinder shell 10 and the head 11, and the partition plates 2 are connected between the outer wall of the positioning tube 14 and the inner wall of the cylinder shell 10, so that all the tube chambers are isolated from each other by the partition plates 2.
[0025] In addition, refer to Figure 1 During processing, the partition plate 2, the cylinder shell 10 and the head 11 are welded together and then assembled as a whole on the tube sheet 12. The tube sheet 12 is provided with a slot for inserting the partition plate 2. Each group of partition plates 2 is inserted into the slot on the end surface of the tube sheet 12, and a sealing gasket 120 is provided between the slot and the partition plate 2. Finally, the cylinder shell 10 and the tube sheet 12 are locked by the flange 13.
[0026] Reference Figure 3 and Figure 4 In this embodiment, each group of partition plates 2 includes two groups of partition plates 20, and a gap 21 is left between the two groups of partition plates 20, that is, the partition plates 2 are of a sandwich structure, which is used to reduce the heat transfer between different chambers on both sides of the partition plates 2, so that the heat exchange medium between each tube pass cannot directly transfer heat through the partition plates 2, thereby improving the heat exchange efficiency.
[0027] In addition, in one embodiment, referring to Figure 3On any cross section perpendicular to the axis of the positioning tube 14, the cross-sectional profile of the partition 20 is wavy and is arranged to extend in the radial direction of the circular end face of the cylinder shell 10. Each group of partitions 20 is connected between the outer wall of the positioning tube 14 and the inner wall of the multi-pass chamber 1, so that the partition plate 20 has a certain flexibility and elasticity. Therefore, under the action of the temperature difference of heat exchange, there is a small local concentrated stress at the connection between the partition plate 2 and the cylinder shell 10 and the head 11, so that the weld at the connection is firm and not easy to fall off.
[0028] In addition, in one embodiment, referring to Figure 3 and Figure 4 In each group of partition plates 2, the inner sides of the two groups of partition plates 20 are arranged opposite to each other, and the outer side of each group of partition plates 20 is also provided with a guide plate 3 to make the fluid in the multi-tube chamber 1 turbulent; Figure 1 In the axial direction of the positioning tube 14, the guide plate 3 is arranged to extend in a wave shape. By welding the guide plate 3 to the partition plate 2, the flow velocity of the heat exchange medium in each tube pass is uniform to form turbulence. Therefore, the impact force of the medium in the tube pass on the tube sheet 12 and the connecting joints of the heat exchange tubes inserted in the tube sheet 12 is small, and the connecting joints are not subjected to force in a single direction, so erosion will not be formed, which solves the problem of vibration of the heat exchange tube and the easy cracking and falling off of the joint welds connecting the heat exchange tube and the tube sheet 12, and greatly increases the service life of the heat exchanger.
[0029] In the heat exchanger tube box structure of the utility model, the connection of the partition plates 2 is positioned by a central positioning tube 14 and distributed along the radial direction. Each partition plate 2 is the same, which facilitates the standardization, serialization and batch production of the heat exchanger.
[0030] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A heat exchanger tube box structure, characterized in that: The invention comprises a multi-pass chamber (1) having a group of positioning tubes (14) and a plurality of groups of pass partitions (2) arranged therein, wherein the plurality of groups of pass partitions (2) are arranged in a circular array around the axis of the positioning tube (14) in the multi-pass chamber (1), and each group of the pass partitions (2) comprises two groups of partitions (20), and a gap (21) is left between the two groups of the partitions (20) to reduce heat transfer between adjacent tubes in the multi-pass chamber (1).
2. The heat exchanger tube box structure according to claim 1, characterized in that: On any cross section perpendicular to the axis of the positioning tube (14), the cross-sectional profile of the partition (20) is wavy, and the partition (20) is connected between the outer wall of the positioning tube (14) and the inner wall of the multi-tube chamber (1).
3. The heat exchanger tube box structure according to claim 1 or 2, characterized in that: In each group of the partition plates (2), the inner side surfaces of the two groups of the partition plates (20) are arranged opposite to each other, and the outer side surfaces of the two groups of the partition plates (20) are also provided with guide plates (3) to make the fluid in the multi-pass chamber (1) turbulent.
4. The heat exchanger tube box structure according to claim 3, characterized in that: In the axial direction of the positioning tube (14), the guide plate (3) is arranged to extend in a wave shape.
5. The heat exchanger tube box structure according to claim 1, characterized in that: The multi-tube chamber (1) is formed by a cylinder shell (10), a tube sheet (12) arranged at one end of the cylinder shell (10), and a head (11) arranged at the other end of the cylinder shell (10); the multi-group flow partitions (2) are welded to the inner walls of the cylinder shell (10) and the head (11), and the multi-group flow partitions (2) are all inserted into the end surface of the tube sheet (12).
6. The heat exchanger tube box structure according to claim 5, characterized in that: The tube sheet (12) is provided with a slot for inserting the partition plate (2), and a sealing gasket (120) is provided between the slot and the partition plate (2).
7. The heat exchanger tube box structure according to claim 5, characterized in that: The tube sheet (12) and the cylinder shell (10) are detachably connected via a flange (13).
8. The heat exchanger tube box structure according to claim 1, characterized in that: The multi-pass chamber (1) is a three-pass chamber, a four-pass chamber or a five-pass chamber.