Coil pipe composite tube type heat exchanger

Abstract

The utility model discloses a coil pipe composite tube type heat exchanger which comprises a cylinder body, a coil pipe, a coil pipe, a coil pipe and a coil pipe, and the cylinder body is provided with a second connecting pipe and a third connecting pipe; the second surface of the first tube plate is hermetically welded on the first end of the cylinder body; one side of the first tube box is hermetically welded on the first surface of the first tube plate, and a connecting tube is hermetically welded on the other side of the first tube box; the first surface of the second tube plate is hermetically welded on the second end of the cylinder body; one side of the second tube box is hermetically welded on the second surface of the second tube plate, and a fourth connecting tube is hermetically welded on the other side of the second tube box; the heat transfer tube penetrates through the first tube plate and the second tube plate and is hermetically welded with the same; the coil pipe is arranged outside the heat transfer pipe, a sixth connecting pipe is welded to one end of the coil pipe in a sealed mode, and a fifth connecting pipe is welded to the other end of the coil pipe in a sealed mode. According to the utility model, the heat transfer pipe in the cylinder body is provided with the sleeved coil pipe structure, so that the problem of low heat exchange efficiency due to the arrangement of the coil pipe outside the cylinder body can be solved, the heat transfer pipe and the coil pipe are immersed in the cylinder, and more sufficient heat exchange of three fluids can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, and particularly relates to a coiled tube composite tubular heat exchanger. Background Art

[0002] A heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid, also known as a heat exchanger. A heat exchanger is an energy-saving device that realizes heat transfer between materials among two or more fluids at different temperatures. It enables heat to be transferred from a fluid with a higher temperature to a fluid with a lower temperature, so that the fluid temperature reaches the specified index of the process, to meet the needs of process conditions. At the same time, it is also one of the main devices for improving energy utilization efficiency.

[0003] The structure of the existing coiled tube (or tubular) heat exchanger mainly includes a coiled tube (or called a snake tube). The coiled tube is mainly wound outside the heat exchange cylinder, and the heat transfer tubes inside the heat exchange cylinder do not contact the coiled tube, which cannot achieve better heat exchange, is not conducive to the needs of efficient production, and also causes a certain waste of energy. In large-scale production, relying only on a tubular heat exchanger with ordinary baffle plates and heat transfer tubes, the heat transfer efficiency still cannot meet the needs of efficient heat transfer. Moreover, limited by processing requirements and the like, the number of traditional round tubular columns arranged inside is limited, and the heat exchange effect cannot be further improved. Summary of the Invention

[0004] (I) Technical Problems to be Solved

[0005] In order to solve the problems existing in the above background art, the utility model designs a coiled tube composite tubular heat exchanger. By arranging a coiled tube structure with multiple layers of sleeve joints on the heat transfer tubes and allowing the heat transfer tubes and the coiled tubes to be immersed in the cylinder and combining the role of baffle plates, the problem of poor heat exchange effect between the heat transfer tubes and the coiled tubes in the central part can be solved, and more sufficient heat exchange of three fluids can be achieved. At the same time, a larger heat exchange effect can be obtained with a smaller number of columns.

[0006] (II) Technical Solutions

[0007] To achieve the above object, the utility model provides the following technical solutions:

[0008] A coiled tube composite tubular heat exchanger, comprising:

[0009] A cylinder body, the cylinder body has a first end and a second end oppositely arranged along the length direction, and a second connecting pipe and a third connecting pipe are arranged on the cylinder body, and the second connecting pipe and the third connecting pipe are communicated with the cylinder body;

[0010] A first tube sheet, the first tube sheet has a first surface and a second surface oppositely arranged along the thickness direction, and the second surface of the first tube sheet is sealed and welded on the first end of the cylinder body;

[0011] The first tube sheet, one side of the first tube sheet is hermetically welded to the first surface of the first tube plate, and a nozzle is hermetically welded to the other side of the first tube sheet. The first nozzle is in communication with the first tube sheet;

[0012] The second tube plate, the second tube plate has a first surface and a second surface oppositely arranged along the thickness direction, and the first surface of the second tube plate is hermetically welded to the second end of the cylinder body;

[0013] The second tube sheet, one side of the second tube sheet is hermetically welded to the second surface of the second tube plate, and a fourth nozzle is hermetically welded to the other side of the second tube sheet. The fourth nozzle is in communication with the second tube sheet;

[0014] Heat transfer tubes, several of the heat transfer tubes pass through the first tube plate and the second tube plate and are hermetically welded thereto, and the heat transfer tubes communicate the first tube sheet with the second tube sheet;

[0015] The coil, the coil is arranged outside several of the heat transfer tubes, one end of the coil is hermetically welded with a sixth nozzle, the other end of the coil is hermetically welded with a fifth nozzle, and both the sixth nozzle and the fifth nozzle protrude from the outer surface of the cylinder body.

[0016] As a preferred solution of the previous step, the heat exchanger further includes baffle plates, several of the baffle plates are arranged at intervals between the first tube plate and the second tube plate, and the baffle plates are used to change the flow direction of the fluid A in the cylinder body.

[0017] As a preferred solution of the previous step, the baffle plate has an upper end and a lower end oppositely arranged along the height direction. One upper end of the baffle plate is welded to the inner wall of the cylinder body, and there is a gap between one lower end of the baffle plate and the inner wall of the cylinder body; between one lower end of the baffle plate adjacent to the baffle plate and the inner wall of the cylinder body is welded, and there is a gap between the upper end and the inner wall of the cylinder body.

[0018] As a preferred solution of the previous step, the coil is of a multi-section structure, and each section of the coil is of a spiral structure.

[0019] As a preferred solution of the previous step, the multi-section coils are connected in series through connecting pipes.

[0020] As a preferred solution of the previous step, a support seat is arranged at the lower end of the outer wall of the first tube sheet and / or the second tube sheet and / or the cylinder body.

[0021] As a preferred solution of the previous step, the cross section of the heat transfer tube is circular or elliptical.

[0022] As a preferred solution of the previous step, when the cross section of the heat transfer tube is selected as elliptical, the welding joints at both ends thereof with the first tube plate and the second tube plate are selected as circular.

[0023] (III) Beneficial effects

[0024] The utility model provides a coiled tube composite shell-and-tube heat exchanger, which has the following beneficial effects:

[0025] 1. The product of the utility model is provided with a coiled tube structure sleeved on the heat transfer tubes inside the cylinder body, which can solve the problem of low heat exchange efficiency of the coiled tube arranged outside the cylinder body, immerse the heat transfer tubes and the coiled tubes in the cylinder, and can realize more sufficient heat exchange of three fluids.

[0026] 2. The product of the utility model is provided with a plurality of baffles arranged at intervals inside the cylinder body, which can make the fluid inside the cylinder stay better and fully realize heat exchange.

[0027] 3. Coiled tubes are arranged on the outer layers of the heat transfer tubes in the cavities isolated by the baffles of the product of the utility model, and the coiled tubes are connected in series through connecting pipes, which can fully realize heat exchange in each heat exchange cavity.

[0028] 4. When the elliptical heat transfer tubes are adopted in the product of the utility model, more tube bundles can be installed in the heat transfer tubes of the same size, and better heat exchange effect can be realized; or when the heat exchange effect is the same, the equipment size can be smaller.

[0029] 5. The product of the utility model has a simple structure, is convenient for processing, manufacturing and popularization. The structural design of the coiled tubes sleeved on the heat transfer tubes combined with the baffles enables rapid heat exchange inside the heat exchanger, improves problems such as slow traditional heat exchange and waste of external heat exchange resources, and improves the heat exchange effect. Description of the Drawings

[0030] Figure 1 It is a front view structural schematic diagram of the first embodiment of the utility model;

[0031] Figure 2 It is a left view structural schematic diagram of the first embodiment of the utility model;

[0032] Figure 3 It is a sectional view structural schematic diagram of the first embodiment of the utility model;

[0033] Figure 4 It is the utility model Figure 3 View in the direction of a;

[0034] Figure 5 It is the utility model Figure 3 View b-b in the utility model;

[0035] Figure 6 It is a left view structural schematic diagram of the coiled tube assembly of the first embodiment of the utility model;

[0036] Figure 7 It is a left view structural schematic diagram of the coiled tube assembly of the second embodiment of the utility model;

[0037] Figure 8 It is the utility modelFigure 7 View in the direction of b;

[0038] Figure 9 This utility model Figure 7 View of e-e in this utility model.

[0039] Wherein, 1. First tube sheet, 2. First tube plate, 3. First nozzle, 4. Second nozzle, 5. Support seat, 6. Third nozzle, 7. Fourth nozzle, 8. Second tube sheet, 9. Second tube plate, 10. Fifth nozzle, 11. Cylinder body, 12. Sixth nozzle, 13. Coiled tube, 14. Baffle plate, 15. Heat transfer tube, 16. Connecting tube, 17. Elliptical heat transfer tube. Specific embodiments

[0040] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0041] Such as Figures 1-6As shown in the figure, a coiled tube composite shell-and-tube heat exchanger of the present application includes: a shell body 11, a first tube sheet 2, a first tube header 1, a second tube sheet 9, a second tube header 8, heat transfer tubes 15, and a coiled tube 13. Among them, the shell body 11 of the present application has a first end and a second end oppositely arranged along the length direction. The shell body 11 of the present application can be an integral body or formed by welding multiple segments. A second nozzle 4 and a third nozzle 6 are provided on the shell body 11. Preferably, both the second nozzle 4 and the third nozzle 6 are welded to the shell body 11 by welding, and the second nozzle 4 and the third nozzle 6 of the present application are communicated with the shell body 11; the first tube sheet 2 of the present application has a first surface and a second surface oppositely arranged along the thickness direction. The second surface of the first tube sheet 2 is hermetically welded to the first end of the shell body 11. The first tube sheet 2 of the present application is preferably in a round cake shape, and its radius dimension corresponds to the outer surface radius dimension of the shell body 11; one side of the first tube header 1 of the present application is hermetically welded to the first surface of the first tube sheet 2, and a nozzle 3 is hermetically welded to the other side of the first tube header 1. The first nozzle 3 is communicated with the first tube header 1. The first tube header 1 of the present application is similar in shape to a disc, and its outer surface radius is equivalent to the radius of the first tube sheet 2; the second tube sheet 9 of the present application has a first surface and a second surface oppositely arranged along the thickness direction. The first surface of the second tube sheet 9 is hermetically welded to the second end of the shell body 11. The second tube sheet 9 of the present application is preferably in a round cake shape, and its radius dimension corresponds to the outer surface radius dimension of the shell body 11; one side of the second tube header 8 of the present application is hermetically welded to the second surface of the second tube sheet 9, and a fourth nozzle 7 is hermetically welded to the other side of the second tube header 8. The fourth nozzle 7 is communicated with the second tube header 8. The second tube header 8 of the present application is similar in shape to a disc, and its outer surface radius is equivalent to the radius of the first tube sheet 2; a number of through holes (coinciding with the heat transfer tubes 15 in the figure and not marked) are provided on both the first tube sheet 2 and the second tube sheet 9 of the present application. A number of heat transfer tubes 15 pass through the first tube sheet 2 and the second tube sheet 9 and are hermetically welded thereto. The heat transfer tubes 15 realize the communication between the first tube header 1 and the second tube header 8; the coiled tube 13 of the present application is arranged outside a number of heat transfer tubes 15. One end of the coiled tube 13 is hermetically welded with a sixth nozzle 12, and the other end of the coiled tube 13 is hermetically welded with a fifth nozzle 10. Both the sixth nozzle 12 and the fifth nozzle 10 protrude from the outer surface of the shell body 11. Fluid C enters through the sixth nozzle 12, then passes through the coiled tube 13, and then flows out through the fifth nozzle 10.

[0042] As a preferred solution of the previous step, the heat exchanger of the present application further includes baffle plates 14. A plurality of baffle plates 14 are arranged at intervals between the first tube sheet 2 and the second tube sheet 9. The baffle plates 14 are used to change the flow direction of fluid A in the cylinder body 11. The baffle plates 14 have an upper end and a lower end oppositely arranged in the height direction. One end of the upper end of a baffle plate 14 is welded to the inner wall of the cylinder body 11, and there is a gap between the lower end of one baffle plate 14 and the inner wall of the cylinder body 11. There is a gap between the lower end of one baffle plate 14 adjacent to the baffle plate 14 and the inner wall of the cylinder body 11 and the upper end and the inner wall of the cylinder body 11, that is, one of the adjacent two baffle plates 14 has its upper end welded to the inner wall of the cylinder body 11, and the other has its lower end welded to the inner wall of the cylinder body 11. If the upper end is welded, there is a gap at the lower end, and if the lower end is welded, there is a gap at the upper end. The two sides of the baffle plate 14 of the present application are also welded to the inner wall of the cylinder body 11, which can be sealed welding or non-sealed welding, as long as it can be fixed.

[0043] As a preferred solution of the previous step, the coil pipe 13 of the present application is preferably a multi-segment structure. Each section of the coil pipe 13 is a spiral structure. The multi-segment coil pipes 13 are connected in series through a connecting pipe 16. The connecting pipe 16 passes through the gap between the baffle plate 14 and the inner wall of the cylinder body 11.

[0044] As a preferred solution of the previous step, a support seat 5 is provided at the lower end of the outer wall of the first header 1 and / or the second header 8 and / or the cylinder body 11 of the present application. Preferably, a support seat 5 is welded to the lower end of the outer walls of the first header 1 and the second header 8 of the present application, and two support seats 5 are welded to the lower end of the outer wall of the cylinder body 11. The heat exchanger of the present application can be better supported by the four support seats 5.

[0045] As a preferred solution of the previous step, the cross-section of the heat transfer tube 15 of the present application is circular. Embodiment

[0046] The cross-section of the heat transfer tube 15 of the present application is circular or elliptical, preferably elliptical. The heat transfer tube 15 is rolled into an elliptical heat transfer tube 17. Under the condition of a certain unit cross-sectional area and a relatively equal tube pitch, more heat transfer tubes can be installed to improve the heat exchange effect. In order to reduce the processing difficulty, when the main cross-section of the heat transfer tube 15 is selected as an ellipse, the welded parts with the first tube sheet 2 and the second tube sheet 9 can be selected as circular.

[0047] Specific implementation process:

[0048] Fluid B enters the first header 1 from the first connecting pipe 3, then enters the second header 8 from the heat transfer tube 15, and finally flows out from the fourth connecting pipe 7. When fluid B is inside the heat transfer tube 15, it can exchange heat with fluid C in the coil pipe 13 and fluid A in the cylinder body 11.

[0049] Fluid A enters the interior of the cylinder body 11 from the end of the second connection pipe 4. Fluid A can fully exchange heat with liquid C in the coil pipe 13 immersed in the interior of the cylinder body 11 and liquid B in the heat transfer pipe 15. Fluid A undergoes baffle flow through multiple groups of baffle plates 14 arranged at intervals to prevent fluid A from flowing out too fast and failing to fully exchange heat.

[0050] Fluid C enters the coil pipe 13 from the end of the sixth connection pipe 12, exchanges heat with fluid A and fluid C, and finally flows out from the end of the fifth connection pipe 10. A number of groups of coil pipes 13 are provided. The number of groups of coil pipes 13 are connected in series by a connecting pipe 16 at the baffle plate 14, and better heat exchange can be achieved in the cavity isolated by the baffle plate 14.

[0051] The above achieves the design purpose.

[0052] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0053] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. In summary, the present invention achieves the intended purpose.

Claims

1. A coiled tube composite shell and tube heat exchanger, characterized in that, Comprising: A cylinder body (11), the cylinder body (11) having a first end and a second end oppositely arranged in the length direction, and a second nozzle (4) and a third nozzle (6) are arranged on the cylinder body (11), and the second nozzle (4) and the third nozzle (6) are communicated with the cylinder body (11); A first tube sheet (2), the first tube sheet (2) having a first surface and a second surface oppositely arranged in the thickness direction, and the second surface of the first tube sheet (2) is sealed and welded on the first end of the cylinder body (11); A first tube box (1), one side of the first tube box (1) is sealed and welded on the first surface of the first tube sheet (2), and a nozzle (3) is sealed and welded on the other side of the first tube box (1), and the first nozzle (3) is communicated with the first tube box (1); A second tube sheet (9), the second tube sheet (9) having a first surface and a second surface oppositely arranged in the thickness direction, and the first surface of the second tube sheet (9) is sealed and welded on the second end of the cylinder body (11); A second tube box (8), one side of the second tube box (8) is sealed and welded on the second surface of the second tube sheet (9), and a fourth nozzle (7) is sealed and welded on the other side of the second tube box (8), and the fourth nozzle (7) is communicated with the second tube box (8); Heat transfer tubes (15), several of the heat transfer tubes (15) pass through the first tube sheet (2) and the second tube sheet (9) and are sealed and welded thereto, and the heat transfer tubes (15) realize the communication between the first tube box (1) and the second tube box (8); A coil tube (13), the coil tube (13) is arranged outside several of the heat transfer tubes (15), one end of the coil tube (13) is sealed and welded with a sixth nozzle (12), the other end of the coil tube (13) is sealed and welded with a fifth nozzle (10), and both the sixth nozzle (12) and the fifth nozzle (10) protrude from the outer surface of the cylinder body (11); The heat exchanger further includes baffle plates (14), several of the baffle plates (14) are arranged at intervals between the first tube sheet (2) and the second tube sheet (9), and the baffle plates (14) are used to change the flow direction of fluid A in the cylinder body (11); The baffle plates (14) have an upper end and a lower end oppositely arranged in the height direction, the upper end of one of the baffle plates (14) is welded to the inner wall of the cylinder body (11), and there is a gap between the lower end of one of the baffle plates (14) and the inner wall of the cylinder body (11); The lower end of one of the baffle plates (14) and the adjacent baffle plate (14) is welded to the inner wall of the cylinder body (11), and there is a gap between the upper end and the inner wall of the cylinder body (11); The coil tube (13) is of a multi-section structure, and each section of the coil tube (13) is of a spiral structure; The multi-section coil tubes (13) are connected in series through connecting tubes (16).

2. The coiled tube composite shell and tube heat exchanger according to claim 1, wherein: A support seat (5) is arranged at the lower end of the outer wall of the first tube box (1) and / or the second tube box (8) and / or the cylinder body (11).

3. The coiled tube composite shell-and-tube heat exchanger according to claim 1, wherein: The cross section of the heat transfer tube (15) is circular or elliptical.

4. The coiled tube composite shell and tube heat exchanger according to claim 3, characterized in that: When the cross section of the heat transfer tube (15) is selected as elliptical, the welding joints at both ends thereof with the first tube sheet (2) and the second tube sheet (9) are selected as circular.

Images