Combined tube box structure of multi-strand winding tube type heat exchanger

Abstract

The utility model discloses a combined tube box structure of a multi-stream winding tube type heat exchanger, which comprises a first tube box, a tube plate fixedly connected to the lower end of the first tube box, a separator for separating the interior of the first tube box into a plurality of tube passes, and a plurality of connecting tubes respectively communicated with the plurality of tube passes, the tube plate is provided with a plurality of through hole sets communicated with the tube passes. In the utility model, the plurality of tube passes are arranged in the first tube box, so that the diameter and the thickness of the tube plate are reduced by improving the tube distribution rate of the tube plate, the weight of the tube plate is reduced, and the material and the manufacturing cost of the tube plate are reduced; besides, due to the fact that the diameter of the tube plate is small, the diameter of the combined tube box structure of the multi-strand winding tube type heat exchanger can be correspondingly reduced, the diameter of the combined tube box structure of the multi-strand winding tube type heat exchanger becomes more compact, and therefore the transportation difficulty and the transportation cost are reduced while the equipment cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of multi-stream wound tube heat exchangers, in particular to a multi-stream wound tube heat exchanger combined tube box structure. Background Art

[0002] In a multi-stream wound tube heat exchanger, the media of each stream is usually different from each other, and can only flow in their own independent tube passes and cannot mix with each other. At present, the tube box of a conventional wound tube heat exchanger is usually a single tube pass. In order to achieve multi-stream heat exchange, not only the stream with the largest number of heat exchange tubes passes through the tube box, but also the heat exchange tubes of other streams are separated and led from the shell side to the side of the shell side to the side of each side branch small tube box connected to the shell side. However, on the one hand, this increases the difficulty of winding and threading the tubes, the shell side structure is more complicated, the shell manufacturing difficulty increases, and it is not conducive to equipment maintenance operations; on the other hand, when the number of heat exchange tubes of the side stream is large, the side branch tube box will increase accordingly, which causes the opening reinforcement of the side branch tube box and the shell side connection to exceed the conventional opening reinforcement range, which is not conducive to design.

[0003] In order to reduce or avoid connecting the side branch small tube box from the shell side, it is often designed to place multiple independent small tube boxes on the large tube sheet. Although this reduces the design and manufacturing difficulty of the multi-stream wound tube heat exchanger to a certain extent, the large tube sheet has a low tube layout rate, which makes the tube sheet diameter, thickness and weight larger. The tube sheet needs to be forged with super-large forgings, which is difficult to manufacture and costly; at the same time, the larger the tube sheet diameter, the larger the overall diameter of the multi-stream wound tube heat exchanger, which will bring about problems such as non-compact equipment structure, increased equipment weight, increased production and manufacturing costs, and difficult and high transportation costs. Utility Model Content

[0004] In order to overcome the defects of the prior art, the utility model provides a combined tube box structure of a multi-stream wound tube heat exchanger, which can make the structure more compact.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] A combined tube box structure of a multi-stream wound tube heat exchanger comprises a first tube box, a tube sheet fixedly connected to the lower end of the first tube box, a partition for dividing the first tube box into a plurality of tube passes and a plurality of connecting pipes respectively connected to the plurality of tube passes, and a through hole group respectively connected to the plurality of tube passes is arranged on the tube sheet.

[0007] In one embodiment, a first connecting pipe is provided on one side of the first pipe box, the partition includes a second pipe box, the second pipe box is provided in the first pipe box and a second connecting pipe passing through the first pipe box is provided at the upper end, and the lower end of the second pipe box is fixedly connected to the tube sheet.

[0008] The beneficial effect of adopting the above technical solution is that the second pipe box can divide the first pipe box so that a pipe pass is formed between the outer wall of the first pipe box and the inner wall of the second pipe box, and another pipe pass is formed in the second pipe box, and the first connecting pipe and the second connecting pipe respectively connect the two pipe passes.

[0009] In one embodiment, the first pipe box and the second pipe box are coaxially arranged.

[0010] The beneficial effects of adopting the above technical solution are as follows: the first pipe box and the second pipe box are both rotating shells, which can withstand a higher design pressure, so there is no restriction on the design pressure of each pipe pass.

[0011] In one embodiment, the first pipe box includes a first cylinder, the lower end of the first cylinder is fixedly connected to the tube sheet, the upper end of the first cylinder is provided with a head, and a first connecting pipe is provided on one side of the first cylinder; the second pipe box includes a second cylinder located in the first cylinder, the lower end of the second cylinder is fixedly connected to the tube sheet, and the upper end of the second cylinder is provided with a reducer and a second connecting pipe in sequence.

[0012] In one embodiment, a hole body for passing the second connecting pipe is arranged on the sealing head, and the hole diameter of the hole body matches the outer diameter of the second connecting pipe.

[0013] The beneficial effect of adopting the above technical solution is that such an arrangement enables the second connecting pipe to pass through the hole of the head and avoids leakage between the hole of the head and the second connecting pipe.

[0014] In one embodiment, the first tube box and the tube sheet, the second tube box and the tube sheet, and the first tube box and the second tube are all connected by welding.

[0015] In one embodiment, the partition includes a first partition plate horizontally arranged between the first pipe box and the second pipe box and two second partition plates vertically arranged between the first pipe box and the second pipe box; the outer side of the first partition plate is fixedly connected to the inner wall of the first pipe box, the inner side of the first partition plate is fixedly connected to the outer wall of the second pipe box and the side of the two second partition plates close to the first connecting pipe, and the first partition plate is higher than the first connecting pipe; the lower end of the second partition plate is fixedly connected to the tube plate, and the upper end of the second partition plate is fixedly connected to the first partition plate; a third connecting pipe is arranged on the other side of the first pipe box.

[0016] The beneficial effects of adopting the above technical solution are: the first partition plate and the two second partition plates can divide the space between the inner wall of the first pipe box and the outer wall of the second pipe box into two pipe passes, and these two pipe passes are respectively connected to the first connecting pipe and the third connecting pipe; at the same time, cooperate with the pipe pass in the second pipe box to form a three-pipe pass structure.

[0017] In one embodiment, the first partition plate and the first pipe box, the first partition plate and the second pipe box, the first partition plate and the second partition plate, the second partition plate and the first pipe box, the second partition plate and the second pipe box, and the second partition plate and the tube plate are all connected by welding.

[0018] In one embodiment, a fourth connecting pipe and a fifth connecting pipe are respectively provided on both sides of the first pipe box, and the partition includes a third partition plate arranged horizontally and a fourth partition plate arranged vertically, the outer side of the third partition plate is fixedly connected to the inner wall of the first pipe box, the inner side of the third partition plate is fixedly connected to the side of the fourth partition plate close to the fourth connecting pipe, and the third partition plate is higher than the fourth connecting pipe; the lower end of the fourth partition plate is fixedly connected to the tube plate, and the upper end of the fourth partition plate is fixedly connected to the third partition plate.

[0019] The beneficial effect of adopting the above technical solution is that the third partition plate and the fourth partition plate can divide the space in the first pipe box into two pipe passes to form a two-pipe pass structure, and the two pipe passes are respectively connected to the fourth pipe connection and the fifth pipe connection.

[0020] In one embodiment, the third partition plate and the first pipe box, the third partition plate and the fourth partition plate, the fourth partition plate and the first pipe box, and the fourth partition plate and the tube sheet are all connected by welding.

[0021] The beneficial effects of the utility model are:

[0022] Several tube passes are arranged in the first tube box to reduce the diameter and thickness of the tube sheet by increasing the tube layout rate of the tube sheet, thereby reducing the weight of the tube sheet and reducing the material and manufacturing costs of the tube sheet; in addition, since the diameter of the tube sheet is small, the diameter of the multi-stream wound tube heat exchanger combined tube box structure can also be reduced accordingly, and the diameter of the multi-stream wound tube heat exchanger combined tube box structure becomes more compact, thereby reducing the equipment cost while reducing the transportation difficulty and transportation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0024] in:

[0025] Figure 1 Shows a schematic structural diagram of the first embodiment of the utility model;

[0026] Figure 2 Shows Figure 1 Sectional view at AA in the middle;

[0027] Figure 3 It shows a schematic structural diagram of the first pipe box in the first embodiment;

[0028] Figure 4 It shows a schematic structural diagram of the second pipe box in the first embodiment;

[0029] Figure 5 Shows a schematic structural diagram of a second embodiment of the utility model;

[0030] Figure 6 Shows Figure 5 Sectional view at the middle BB;

[0031] Figure 7 A schematic diagram showing the structure of the third embodiment of the utility model is shown;

[0032] Figure 8 Shows Figure 7 Sectional view at CC;

[0033] Fig. 9 Shows a connection diagram of a second embodiment of the utility model;

[0034] Fig.10 A schematic diagram of the structure of a conventional multi-stream wound tube heat exchanger is shown;

[0035] Fig.11 Shows Fig.10 Sectional view at DD in the middle;

[0036] In the drawings, like reference numerals are used for like parts. The drawings are not necessarily to scale.

[0037] Reference numerals:

[0038] 1-first pipe box, 101-first cylinder, 102-head, 2-second pipe box, 201-second cylinder, 202-reducing pipe, 3-first connecting pipe, 4-second connecting pipe, 5-tube sheet, 501-through hole group, 6-first partition plate, 7-second partition plate, 8-third connecting pipe, 9-fourth connecting pipe, 10-fifth connecting pipe, 11-third partition plate, 12-fourth partition plate. DETAILED DESCRIPTION

[0039] The utility model will be further described below in conjunction with the accompanying drawings.

[0040] The utility model provides a combined tube box structure of a multi-stream wound tube heat exchanger, such as Figure 1-9 As shown, it includes a first pipe box 1, a tube sheet 5 fixedly connected to the lower end of the first pipe box 1, a partition for dividing the first pipe box 1 into a plurality of pipe passes and a plurality of pipes respectively connected to the plurality of pipe passes, and a through hole group 501 respectively connected to the plurality of pipe passes is provided on the tube sheet 5.

[0041] It can be understood that several tube passes are arranged in the first tube box 1 to reduce the diameter and thickness of the tube sheet 5 by increasing the tube layout rate of the tube sheet 5, thereby reducing the weight of the tube sheet 5 and reducing the material and manufacturing costs of the tube sheet 5; in addition, since the diameter of the tube sheet 5 is small, the diameter of the multi-stream wound tube heat exchanger combined tube box structure can also be reduced accordingly, and the diameter of the multi-stream wound tube heat exchanger combined tube box structure becomes more compact, thereby reducing the equipment cost while reducing the transportation difficulty and transportation cost.

[0042] Example 1

[0043] like Figure 1-4 As shown, a first connecting pipe 3 is provided on one side of the first pipe box 1, and the partition includes a second pipe box 2. The second pipe box 2 is arranged in the first pipe box 1 and a second connecting pipe 4 penetrating through the first pipe box 1 is provided at the upper end. The lower end of the second pipe box 2 is fixedly connected to the tube sheet 5; the first pipe box 1 and the second pipe box 2 are coaxially arranged.

[0044] It can be understood that the second pipe box 2 can divide the first pipe box 1 so that a pipe pass is formed between the outer wall of the first pipe box 1 and the inner wall of the second pipe box 2, and another pipe pass is formed in the second pipe box 2, and the first pipe 3 and the second pipe 4 respectively connect the two pipe passes.

[0045] It should be noted that the inner diameter of the second connecting pipe 4 should be large enough to allow people to enter, and the space inside the second pipe box 2 should be large enough to be suitable for people to perform maintenance operations; the inner diameter of the first connecting pipe 3 should be large enough to allow people to enter, and the space between the first pipe box 1 and the second pipe box 2 should be large enough to be suitable for people to perform maintenance operations.

[0046] It should also be noted that the first pipe box 1 and the second pipe box 2 are both rotating shells that can withstand higher design pressures, so there is no restriction on the design pressure of each pipe pass; in the strength design calculation, the first pipe box 1 is considered to withstand the internal pressure of the pipe pass between the first pipe box 1 and the second pipe box 2, and the second pipe box 2 is considered to withstand the internal pressure of the pipe pass in the second pipe box 2 and the external pressure of the pipe pass between the first pipe box 1 and the second pipe box 2, respectively.

[0047] Preferably, the first pipe box 1 includes a first cylinder 101, the lower end of the first cylinder 101 is fixedly connected to the tube sheet 5, the upper end of the first cylinder 101 is provided with a head 102, and a first connecting pipe 3 is provided on one side of the first cylinder 101; the second pipe box 2 includes a second cylinder 201 located in the first cylinder 101, the lower end of the second cylinder 201 is fixedly connected to the tube sheet 5, and the upper end of the second cylinder 201 is provided with a reducer 202 and a second connecting pipe 4 in sequence.

[0048] Preferably, the sealing head 102 is provided with a hole for passing the second connecting pipe 4 , and the hole diameter of the hole matches the outer diameter of the second connecting pipe 4 .

[0049] It is understandable that such an arrangement allows the second connecting pipe 4 to pass through the hole of the sealing head 102 and avoids leakage between the hole on the sealing head 102 and the second connecting pipe 4 .

[0050] Preferably, the first pipe box 1 and the tube sheet 5 , the second pipe box 2 and the tube sheet 5 , and the first pipe box 1 and the second pipe 4 are all connected by welding.

[0051] Example 2

[0052] The difference from Example 1 is that: Figure 5 , Figure 6 and Fig. 9 As shown, the partition of this embodiment also includes a first partition plate 6 horizontally arranged between the first pipe box 1 and the second pipe box 2 and two second partition plates 7 vertically arranged between the first pipe box 1 and the second pipe box 2; the outer side of the first partition plate 6 is fixedly connected to the inner wall of the first pipe box 1, and the inner side of the first partition plate 6 is fixedly connected to the outer wall of the second pipe box 2 and the side of the two second partition plates 7 close to the first connecting pipe 3, and the first partition plate 6 is higher than the first connecting pipe 3; the lower end of the second partition plate 7 is fixedly connected to the tube plate 5, and the upper end of the second partition plate 7 is fixedly connected to the first partition plate 6; a third connecting pipe 8 is arranged on the other side of the first pipe box 1.

[0053] It can be understood that the first partition plate 6 and the two second partition plates 7 can divide the space between the inner wall of the first pipe box 1 and the outer wall of the second pipe box 2 into two pipe passes, and these two pipe passes are respectively connected to the first connecting pipe 3 and the third connecting pipe 8; at the same time, they cooperate with the pipe pass in the second pipe box 2 to form a three-pipe pass structure.

[0054] It should be noted that both the first pipe box 1 and the second pipe box 2 are rotating shells, and the second pipe box 2 can withstand a higher design pressure. The first pipe box 1 is divided into two pipe passes by the first partition plate 6 and the second partition plate 7, and the pressure bearing capacity of the first partition plate 6 and the second partition plate 7 is weak, so the first pipe box 1 is not suitable for withstanding high pressure; in the strength design calculation, the first pipe box 1 is considered according to the higher pressure of the two pipe passes between the inner wall of the first pipe box 1 and the outer wall of the second pipe box 2, and the second pipe box 2 is considered according to the internal pressure of the pipe pass in the second pipe box 2 and the higher external pressure of the two pipe passes between the inner wall of the first pipe box 1 and the outer wall of the second pipe box 2; the thickness of the first partition plate 6 and the second partition plate 7 is calculated according to the higher pressure of the two pipe passes between the inner wall of the first pipe box 1 and the outer wall of the second pipe box 2. If necessary, reinforcing structures such as reinforcing ribs can be set on the first partition plate 6 and the second partition plate 7.

[0055] It should also be noted that the inner diameter of the third connecting pipe 8 should be large enough to allow a person to enter; in addition, in this embodiment, more pipe paths can be separated like the first partition plate 6 and the second partition plate 7.

[0056] Preferably, the first partition plate 6 and the first pipe box 1, the first partition plate 6 and the second pipe box 2, the first partition plate 6 and the second partition plate 7, the second partition plate 7 and the first pipe box 1, the second partition plate 7 and the second pipe box 2, and the second partition plate 7 and the tube plate 5 are all connected by welding.

[0057] Example 3

[0058] like Figure 7 and Figure 8 As shown, in this embodiment, a fourth connecting pipe 9 and a fifth connecting pipe 10 are respectively arranged on both sides of the first pipe box 1, and the partition includes a third partition plate 11 arranged horizontally and a fourth partition plate 12 arranged vertically, the outer side of the third partition plate 11 is fixedly connected to the inner wall of the first pipe box 1, the inner side of the third partition plate 11 is fixedly connected to the side of the fourth partition plate 12 close to the fourth connecting pipe 9, and the third partition plate 11 is higher than the fourth connecting pipe 9; the lower end of the fourth partition plate 12 is fixedly connected to the tube plate 5, and the upper end of the fourth partition plate 12 is fixedly connected to the third partition plate 11.

[0059] It can be understood that the third partition plate 11 and the fourth partition plate 12 can divide the space in the first pipe box 1 into two pipe passes to form a two-pipe pass structure, and the two pipe passes are connected to the fourth pipe 9 and the fifth pipe 10 respectively.

[0060] It should be noted that the first pipe box 1 is not suitable for withstanding high pressure because it is divided into two pipe passes by the third partition plate 11 and the fourth partition plate 12, and the third partition plate 11 and the fourth partition plate 12 have weak pressure-bearing capacity; in strength design calculation, the first pipe box 1 is considered to withstand the higher pressure of the two pipe passes; the thickness of the third partition plate 11 and the fourth partition plate 12 is calculated based on the higher pressure of the two pipe passes, and if necessary, reinforcing structures such as reinforcing ribs can be set on the third partition plate 11 and the partition.

[0061] It should also be noted that the inner diameters of the fourth connecting pipe 9 and the fifth connecting pipe 10 should be large enough to allow people to enter; in addition, in this embodiment, more pipe paths can be separated like the third dividing plate 11 and the fourth dividing plate 12.

[0062] Preferably, the third partition plate 11 and the first pipe box 1 , the third partition plate 11 and the fourth partition plate 12 , the fourth partition plate 12 and the first pipe box 1 , and the fourth partition plate 12 and the tube sheet 5 are all connected by welding.

[0063] For the above three embodiments, a flexible selection can be made according to the number of tube passes and the design pressure; for two tube passes, if the design pressure is high, it is appropriate to adopt embodiment 1, if both are low pressure, then embodiment 3 can be adopted; for multiple tube passes, if the design pressure of one tube pass is high, it is appropriate to adopt embodiment 2, if both are low pressure, then embodiment 3 can be adopted.

[0064] In order to highlight the superior features of the utility model, comparative examples are listed below for illustration.

[0065] Take a certain project equipment as an example, Figure 9-11 As shown, Example 2 is compared with a conventional multi-stream wound tube heat exchanger. Both are provided with three tube passes, and 5024 tubes with a diameter of 17.2 mm are arranged on the tube sheet 5. The comparison results are shown in the following table:

[0066]

[0067] Among them, the tube sheet pipe layout ratio is the percentage of the total pipe layout area to the entire tube sheet area.

[0068] From the comparison results in the above table, it can be seen that the utility model has the following superior features:

[0069] The tube sheet has a high tube layout rate, which can reach twice that of conventional structures, with a smaller tube sheet diameter and thinner tube sheet thickness;

[0070] The weight of the tube sheet is relatively light, which can be as light as 1 / 3 of the conventional structure, which can greatly save material costs and bring significant economic benefits;

[0071] Usually, there is no need to split the pipes, and the user's on-site piping is simple. Conventional structures usually require split pipes to meet the layout requirements of independent pipe boxes on large tube sheets. Splitting the pipes will increase the complexity of the user's on-site piping, making the piping system complicated and increasing the design, manufacturing and installation costs of the piping system;

[0072] In addition, the winding tube bundle is easy to make, just like winding a conventional single-stream tube bundle, and the tube bundle winding efficiency is high. However, the conventional structure has many independent pipe boxes, and the pipes of each pipe box are complexly crossed and interlaced, which makes the winding difficult and the tube bundle winding efficiency low.

[0073] In the description of the present invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0074] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments, and other arrangements may be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the features described in the various dependent claims and herein may be combined in a manner different from that described in the original claims. It may also be understood that the features described in conjunction with the individual embodiments may be used in other described embodiments.

Claims

1. A multi-stream wound tube heat exchanger combined tube box structure, characterized in that: The invention comprises a first pipe box (1), a tube sheet (5) fixedly connected to the lower end of the first pipe box (1), a partition for dividing the first pipe box (1) into a plurality of pipe passes, and a plurality of pipes respectively connected to the plurality of pipe passes, wherein the tube sheet (5) is provided with a through hole group (501) respectively connected to the plurality of pipe passes.

2. The multi-stream wound tube heat exchanger combined tube box structure according to claim 1, characterized in that: A first connecting pipe (3) is arranged on one side of the first pipe box (1), the partition comprises a second pipe box (2), the second pipe box (2) is arranged in the first pipe box (1) and a second connecting pipe (4) penetrating through the first pipe box (1) is arranged at the upper end, and the lower end of the second pipe box (2) is fixedly connected to the tube sheet (5).

3. The multi-stream wound tube heat exchanger combined tube box structure according to claim 2, characterized in that: The first pipe box (1) and the second pipe box (2) are coaxially arranged.

4. The multi-stream wound tube heat exchanger combined tube box structure according to claim 2, characterized in that: The first pipe box (1) comprises a first cylinder (101), the lower end of the first cylinder (101) is fixedly connected to the tube sheet (5), the upper end of the first cylinder (101) is provided with a head (102), and one side of the first cylinder (101) is provided with the first connecting pipe (3); the second pipe box (2) comprises a second cylinder (201) located in the first cylinder (101), the lower end of the second cylinder (201) is fixedly connected to the tube sheet (5), and the upper end of the second cylinder (201) is provided with a reducer (202) and a second connecting pipe (4) in sequence.

5. The multi-stream wound tube heat exchanger combined tube box structure according to claim 4, characterized in that: The sealing head (102) is provided with a hole for passing the second connecting pipe (4), and the hole diameter of the hole matches the outer diameter of the second connecting pipe (4).

6. The multi-stream wound tube heat exchanger combined tube box structure according to claim 2, characterized in that: The first pipe box (1) and the tube sheet (5), the second pipe box (2) and the tube sheet (5), and the first pipe box (1) and the second pipe (4) are all connected by welding.

7. The multi-stream wound tube heat exchanger combined tube box structure according to claim 2, characterized in that: The partition comprises a first partition plate (6) arranged horizontally between the first pipe box (1) and the second pipe box (2) and two second partition plates (7) arranged vertically between the first pipe box (1) and the second pipe box (2); the outer side of the first partition plate (6) is fixedly connected to the inner wall of the first pipe box (1), the inner side of the first partition plate (6) is fixedly connected to the outer wall of the second pipe box (2) and the side of the two second partition plates (7) close to the first connecting pipe (3), and the first partition plate (6) is higher than the first connecting pipe (3); the lower end of the second partition plate (7) is fixedly connected to the pipe plate (5), and the upper end of the second partition plate (7) is fixedly connected to the first partition plate (6); a third connecting pipe (8) is arranged on the other side of the first pipe box (1).

8. The multi-stream wound tube heat exchanger combined tube box structure according to claim 7, characterized in that: The first partition plate (6) and the first pipe box (1), the first partition plate (6) and the second pipe box (2), the first partition plate (6) and the second partition plate (7), the second partition plate (7) and the first pipe box (1), the second partition plate (7) and the second pipe box (2), and the second partition plate (7) and the tube plate (5) are all connected by welding.

9. The multi-stream wound tube heat exchanger combined tube box structure according to claim 1, characterized in that: A fourth connecting pipe (9) and a fifth connecting pipe (10) are respectively arranged on both sides of the first pipe box (1), and the partition comprises a third dividing plate (11) arranged transversely and a fourth dividing plate (12) arranged vertically, the outer side of the third dividing plate (11) is fixedly connected to the inner wall of the first pipe box (1), the inner side of the third dividing plate (11) is fixedly connected to the side of the fourth dividing plate (12) close to the fourth connecting pipe (9), and the third dividing plate (11) is higher than the fourth connecting pipe (9); the lower end of the fourth dividing plate (12) is fixedly connected to the tube plate (5), and the upper end of the fourth dividing plate (12) is fixedly connected to the third dividing plate (11).

10. The multi-stream wound tube heat exchanger combined tube box structure according to claim 9, characterized in that: The third partition plate (11) and the first pipe box (1), the third partition plate (11) and the fourth partition plate (12), the fourth partition plate (12) and the first pipe box (1), and the fourth partition plate (12) and the tube sheet (5) are all connected by welding.

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