Novel four-tube-pass heat exchanger

Abstract

The utility model belongs to the technical field of structural improvement of four-tube-pass heat exchangers, and particularly relates to a novel four-tube-pass heat exchanger which comprises a tube box, a tube pass medium inlet, a tube pass medium outlet, a tube plate and a heat exchange tube. A first vertical partition plate, a second vertical partition plate and a third vertical partition plate are longitudinally welded between the inner side walls of the tube box, and horizontal partition plates are transversely welded between the rear side of the first vertical partition plate, the left side of the second vertical partition plate, the rear side of the third vertical partition plate and the inner side walls of the tube box. The right end of the horizontal partition plate and the right end of the first vertical partition plate are clamped into the T-shaped clamping groove. According to the novel four-tube-pass heat exchanger, the failure caused by large local stress and peak stress at the root of the tube box connecting tube can be effectively avoided, and the operation stability of the heat exchanger is improved to a certain extent; uniform heat exchange of media in the four tube passes can be achieved, and the heat exchange performance of the heat exchanger is guaranteed.

Description

Technical Field

[0001] The utility model relates to a novel four-tube-pass heat exchanger, belonging to the technical field of structure improvement of four-tube-pass heat exchangers. Background Art

[0002] As a heat exchange equipment, heat exchanger occupies an important position in the petrochemical industry, especially for industries with high energy consumption, how to effectively utilize heat sources and minimize heat loss, heat exchanger plays an important role in it.

[0003] Four-pass heat exchangers are widely used in the petrochemical industry. In the existing four-pass heat exchangers, there are usually two types of settings for the inlet and outlet of the tube box and the structure of the tube box partition: the first type is that the structure of the tube box partition adopts a T-type partition structure. Since the vertical partition is directly opposite to the center of the tube box, the inlet and outlet of the tube box are set at an eccentric position; the second type is the form of layered partitions. Since the partitions are all set horizontally, the inlet and outlet of the tube can be set at the center of the vertical tube box. Although the performance of these two structures of heat exchangers is very stable in actual operation, their local structures have the following defects:

[0004] In the four-pass heat exchanger adopting the first structural form, since the medium inlet and outlet of the tube side of this tube box are arranged at eccentric positions, the position of the tube box pipe is eccentric. For this asymmetric structure, the local stress and peak stress acting on the root of the pipe due to the external load of the pipeline are very large, which can easily cause failure at the root of the pipe, thereby affecting the stability of the heat exchanger operation to a certain extent.

[0005] In a four-pass heat exchanger adopting the second structural form, since the dividing partitions are arranged horizontally and in parallel, the partition grooves divide the tube sheet into four tube pass areas from top to bottom. Under the limitation of the tube layout limiting circle, it is difficult to arrange the tubes of the tube sheet to achieve an equal number of heat exchange tubes in the four tube pass areas. Usually, the number of heat exchange tubes in the upper and lower tube pass areas is small, and the number of heat exchange tubes in the middle two tube pass areas is large. As a result, the heat exchange of the medium in the four tube passes will be uneven when the heat exchanger is running, which will affect the heat exchange performance of the heat exchanger. Utility Model Content

[0006] In view of the above deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a novel four-pass heat exchanger which can prevent failure at the root of the pipe box and ensure uniform heat exchange of the medium in the four pipe passes.

[0007] The novel four-tube-pass heat exchanger described in the utility model comprises a tube box, a tube-pass medium inlet, a tube-pass medium outlet, a tube sheet and a heat exchange tube, wherein a T-shaped slot is arranged on the left side wall of the tube sheet, a first vertical partition, a second vertical partition and a third vertical partition are welded longitudinally between the inner side walls of the tube box, the first vertical partition is located on the center line of the tube box and is located at the right end of the tube box, the third vertical partition is located at the front side of the center line of the tube box, the left end of the third vertical partition is welded to the inner side wall of the tube box, the right end of the third vertical partition is welded to the front end of the second vertical partition, the rear end of the second vertical partition is welded to the left end of the first vertical partition, and the first vertical partition is welded to the inner side wall of the tube box. Horizontal partitions are welded laterally between the rear side of the straight partition, the left side of the second vertical partition, the rear side of the third vertical partition and the inner wall of the pipe box. The horizontal partition is located on the center line of the pipe box. The right ends of the horizontal partition and the first vertical partition are both inserted into the T-shaped slot. The horizontal partition, the first vertical partition, the second vertical partition and the third vertical partition divide the inner side of the pipe box into a pipe-side medium inlet chamber, a pipe-side medium transfer chamber and a pipe-side medium outflow chamber. The pipe-side medium inlet is arranged directly above the center line of the pipe box and corresponds to the pipe-side medium inlet chamber. The pipe-side medium outlet is arranged directly below the center line of the pipe box and corresponds to the pipe-side medium outflow chamber.

[0008] Furthermore, a first slot is provided on the rear side of the first vertical partition, and the horizontal partition is clamped in the first slot.

[0009] Furthermore, a second card slot is provided on the left side of the second vertical partition, and the third vertical partition is clamped in the second card slot.

[0010] Furthermore, a third slot is provided on the rear side of the third vertical partition, and the horizontal partition is clamped in the third slot.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] First, in the novel four-pass heat exchanger described in the present invention, the tube-side medium inlet and the tube-side medium outlet are both arranged at corresponding positions vertically to the center line of the tube box, thereby effectively avoiding failure caused by large local stress and peak stress at the root of the tube box, and improving the stability of the heat exchanger operation to a certain extent.

[0013] Second, in the new four-pass heat exchanger described in the utility model, the horizontal partition and the first vertical partition are both located on the center line of the tube box, so the intersection of the longitudinal groove and the transverse groove of the T-slot is located at the center of the tube sheet. Therefore, the longitudinal groove of the T-slot can divide the tube layout area of ​​the tube sheet into two equal parts on the left and right, wherein the left part is divided into a first tube pass area and a fourth tube pass area of ​​equal area by the transverse groove of the T-slot, and the right part corresponds to the tube pass medium transfer chamber, and is divided into a second tube pass area and a third tube pass area of ​​equal area. Therefore, the four tube pass areas are equal in area, and an equal number of evenly distributed heat exchange tubes can be installed in each tube pass area, thereby achieving uniform heat exchange of the medium in the four tube passes and ensuring the heat exchange performance of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a perspective partial structural schematic diagram of the utility model;

[0015] Figure 2 yes Figure 1 Sectional view at AA in the middle;

[0016] Figure 3 yes Figure 1 Sectional view at the middle BB;

[0017] Figure 4 yes Figure 1 Sectional view at CC;

[0018] Figure 5 yes Figure 4 Left view of the middle tube plate;

[0019] Figure 6 yes Figure 4 Top view of the mid-level partition;

[0020] Figure 7 yes Figure 4 A rear view of the first vertical partition;

[0021] Figure 8 yes Figure 4 Left view of the second vertical partition;

[0022] Fig. 9 yes Figure 4 Rear view of the third vertical partition.

[0023] In the figure: 1. pipe box; 2. tube side medium inlet; 3. tube side medium outlet; 4. tube sheet; 5. heat exchange tube; 6. horizontal partition; 7. tube side medium inlet chamber; 8. tube side medium transfer chamber; 9. tube side medium outflow chamber; 10. first vertical partition; 11. second vertical partition; 12. third vertical partition; 13. T-shaped slot; 14. third slot; 15. first slot; 16. second slot; 17. first tube side area; 18. second tube side area; 19. third tube side area; 20. fourth tube side area. DETAILED DESCRIPTION

[0024] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0025] Embodiment 1:

[0026] like Figures 1 to 5 As shown, the novel four-tube-pass heat exchanger described in the utility model comprises a tube box 1, a tube-pass medium inlet 2, a tube-pass medium outlet 3, a tube sheet 4 and a heat exchange tube 5, wherein a T-shaped slot 13 is provided on the left side wall of the tube sheet 4, and a first vertical partition 10, a second vertical partition 11 and a third vertical partition 12 are welded longitudinally between the inner side walls of the tube box 1, the first vertical partition 10 is located on the center line of the tube box 1 and is located at the right end of the tube box 1, the third vertical partition 12 is located at the front side of the center line of the tube box 1, the left end of the third vertical partition 12 is welded to the inner side wall of the tube box 1, the right end of the third vertical partition 12 is welded to the front end of the second vertical partition 11, the rear end of the second vertical partition 11 is welded to the left end of the first vertical partition 10, and the third vertical partition 12 is welded to the left end of the first vertical partition 10. A horizontal partition 6 is welded laterally between the rear side of the first vertical partition 10, the left side of the second vertical partition 11, the rear side of the third vertical partition 12 and the inner side wall of the pipe box 1. The horizontal partition 6 is located on the center line of the pipe box 1. The right ends of the horizontal partition 6 and the first vertical partition 10 are both inserted into the T-shaped slot 13. The horizontal partition 6, the first vertical partition 10, the second vertical partition 11 and the third vertical partition 12 divide the inner side of the pipe box 1 into a pipe-side medium inlet chamber 7, a pipe-side medium transfer chamber 8 and a pipe-side medium outflow chamber 9. The pipe-side medium inlet 2 is arranged directly above the center line of the pipe box 1 and corresponds to the pipe-side medium inlet chamber 7. The pipe-side medium outlet 3 is arranged directly below the center line of the pipe box 1 and corresponds to the pipe-side medium outflow chamber 9.

[0027] When in use, the tube-side medium flows into the tube-side medium inlet chamber 7 in the tube box 1 through the tube-side medium inlet 2, then flows to the other end through the heat exchange tube 5 installed in the first tube-side area 17, and flows back into the tube-side medium transfer chamber 8 through the heat exchange tube 5 installed in the second tube-side area 18, then flows to the other end again through the heat exchange tube 5 installed in the third tube-side area 19, and then flows back into the tube-side medium outflow chamber 9 through the heat exchange tube 5 installed in the fourth tube-side area 20, and finally flows out through the tube-side medium outlet 3.

[0028] In the novel four-tube-pass heat exchanger described in the utility model, the tube-side medium inlet 2 and the tube-side medium outlet 3 are both arranged at the vertical corresponding position of the center line of the tube box 1, thereby effectively avoiding the failure of the root of the tube box pipe due to large local stress and peak stress, and improving the stability of the heat exchanger operation to a certain extent.

[0029] In the novel four-pass heat exchanger described in the utility model, the horizontal partition 6 and the first vertical partition 10 are both located on the center line of the tube box 1, so the intersection of the longitudinal groove and the transverse groove of the T-shaped slot 13 is located at the center of the tube sheet 4. Therefore, the longitudinal groove of the T-shaped slot 13 can divide the pipe layout area of ​​the tube sheet 4 into two equal parts on the left and right, wherein the left part is divided into a first tube pass area 17 and a fourth tube pass area 20 of equal area by the transverse groove of the T-shaped slot 13, and the right part corresponds to the tube pass medium transfer chamber 8, and is divided into a second tube pass area 18 and a third tube pass area 19 of equal area. Therefore, the four tube pass areas are equal in area, and the same number of evenly distributed heat exchange tubes 5 can be installed in each tube pass area, thereby achieving uniform heat exchange of the medium in the four tube passes, thereby ensuring the heat exchange performance of the heat exchanger.

[0030] Embodiment 2:

[0031] like Figures 1 to 9 As shown, based on Example 1,

[0032] Furthermore, a first slot 15 is provided at the rear side of the first vertical partition 10, and the horizontal partition 6 is clamped in the first slot 15. By clamping the horizontal partition 6 in the first slot 15 and then welding, cracking of the welding point can be effectively prevented, which is conducive to improving the stability of the connection between the horizontal partition 6 and the first vertical partition 10;

[0033] Furthermore, a second card slot 16 is provided on the left side of the second vertical partition 11, and the third vertical partition 12 is clamped in the second card slot 16. By clamping the third vertical partition 12 in the second card slot 16 and then welding, the cracking of the welding point can be effectively prevented, which is conducive to improving the stability of the connection between the third vertical partition 12 and the second vertical partition 11;

[0034] Furthermore, a third card slot 14 is provided on the rear side of the third vertical partition 12, and the horizontal partition 6 is clamped in the third card slot 14. By clamping the horizontal partition 6 in the third card slot 14 and then welding, the cracking of the welding point can be effectively prevented, which is beneficial to improving the stability of the connection between the horizontal partition 6 and the third vertical partition 12.

[0035] It is particularly noted that in the description of the present invention, the directions or positional relationships indicated by the terms "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention rather than requiring that the present invention must be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

Claims

1. A novel four-pass heat exchanger, comprising a tube box (1), a tube-pass medium inlet (2), a tube-pass medium outlet (3), a tube sheet (4) and a heat exchange tube (5), characterized in that: A T-shaped slot (13) is provided on the left side wall of the tube sheet (4); a first vertical partition (10), a second vertical partition (11) and a third vertical partition (12) are welded longitudinally between the inner side walls of the tube box (1); the first vertical partition (10) is located on the center line of the tube box (1) and on the right end of the tube box (1); the third vertical partition (12) is located in front of the center line of the tube box (1); the left end of the third vertical partition (12) is welded to the inner side wall of the tube box (1); the right end of the third vertical partition (12) is welded to the front end of the second vertical partition (11); the rear end of the second vertical partition (11) is welded to the left end of the first vertical partition (10); the rear side of the first vertical partition (10), the left side of the second vertical partition (11) and the third vertical partition (12) are welded to the inner side wall of the tube box (1); A horizontal partition (6) is welded between the rear side of the first vertical partition (12) and the inner side wall of the pipe box (1) in the transverse direction. The horizontal partition (6) is located on the center line of the pipe box (1). The right ends of the horizontal partition (6) and the first vertical partition (10) are both inserted into the T-shaped slot (13). The horizontal partition (6), the first vertical partition (10), the second vertical partition (11) and the third vertical partition (12) divide the inner side of the pipe box (1) into a pipe-side medium inlet chamber (7), a pipe-side medium transfer chamber (8) and a pipe-side medium outlet chamber (9). The pipe-side medium inlet (2) is arranged directly above the center line of the pipe box (1) and corresponds to the pipe-side medium inlet chamber (7). The pipe-side medium outlet (3) is arranged directly below the center line of the pipe box (1) and corresponds to the pipe-side medium outlet chamber (9).

2. The novel four-pass heat exchanger according to claim 1 is characterized in that: A first clamping slot (15) is provided on the rear side of the first vertical partition (10), and the horizontal partition (6) is clamped in the first clamping slot (15).

3. The novel four-pass heat exchanger according to claim 1 is characterized in that: A second card slot (16) is provided on the left side of the second vertical partition (11), and the third vertical partition (12) is locked in the second card slot (16).

4. The novel four-pass heat exchanger according to claim 1 is characterized in that: A third slot (14) is provided on the rear side of the third vertical partition (12), and the horizontal partition (6) is clamped in the third slot (14).

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