A high-flux tube heat exchanger with adjustable tube length

Abstract

The utility model relates to a high flux pipe heat exchanger with adjustable tube length, relates to pipe heat exchanger technical field, including the casing, the casing both ends detachably is equipped with the pipe box, the casing inner wall is located both sides and is equipped with the tube sheet fixedly, the tube sheet end fixedly is equipped with a plurality of tube seat plates, the casing inside is equipped with a plurality of heat exchange tube bundles, the heat exchange tube bundle is composed of center heat exchange pipe and four edge heat exchange pipes, the both ends of center heat exchange pipe and edge heat exchange pipe are penetrated through tube seat plate and are fixedly connected with tube seat plate, the inner wall of pipe box is equipped with sliding cylinder slidingly, wherein one sliding cylinder end is penetrated through a plurality of first communication pieces with its rotary seal connection, and the other sliding cylinder end is penetrated through a plurality of second communication pieces with its rotary seal connection, and the first communication piece and the second communication piece can change the communication condition between center heat exchange pipe and edge heat exchange pipe and between each edge heat exchange pipe. The utility model solves the poor adjustability of the cooling flow distance of the tube fluid of the existing pipe heat exchanger.

Description

Technical Field

[0001] This invention relates to the field of tubular heat exchanger technology, specifically to a high-throughput tubular heat exchanger with adjustable tube length. Background Technology

[0002] Tubular heat exchangers are typical indirect heat exchange devices widely used in industries such as chemical, petroleum, power, and food processing. Their core structure consists of a series of parallel metal tube bundles, typically fixed to a tube sheet and encapsulated within a cylindrical shell. During operation, two fluids at different temperatures flow through the tube side (the space inside the tubes) and the shell side (the space between the outside of the tubes and the inner wall of the shell), respectively, exchanging heat efficiently through the tube walls to achieve cooling or condensation. High-flux tube heat exchangers are tubular heat exchangers that significantly improve heat transfer efficiency through special surface treatments or structural designs. Their core characteristic is that, for the same volume or heat exchange area, their heat transfer coefficient is much higher than that of ordinary heat exchange tubes, making them suitable for applications requiring high-efficiency heat exchange.

[0003] Existing tubular heat exchangers have gradually revealed their shortcomings during use, mainly in the following aspects:

[0004] The adjustable cooling flow distance of the tube-side fluid is poor. Specifically, different fluids require significantly different cooling effects due to differences in their physical properties and process requirements. However, the tube bundles of existing tubular heat exchangers are rigidly fixed to the tube sheets on both sides. This structure determines that the effective heat exchange length of the tube bundle is fixed, resulting in the inability to adjust the cooling flow distance of the tube-side fluid. When the same heat exchanger processes different types of fluids, the fixed cooling path cannot adapt to the different heat loads and required residence times of the fluids, and the cooling effect often varies greatly, which can easily cause problems of "overcooling" or "undercooling", seriously affecting the heat exchanger's heat exchange efficiency.

[0005] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the present invention aims to provide a high-throughput tube heat exchanger with adjustable tube length. When exchanging heat with tube fluids of different thermal properties, the actual cooling flow distance of the tube fluid can be adaptively adjusted according to the cooling requirements of the fluid. This allows the heat exchange process to adapt to the required heat exchange volume of different fluids, effectively avoiding the phenomena of "overcooling" or "undercooling" caused by a fixed flow path, and improving the applicability and heat exchange effect of the heat exchanger.

[0007] To address the above problems, the present invention provides the following technical solution:

[0008] A high-throughput tube heat exchanger with adjustable tube length includes a shell with detachable tube boxes at both ends. Tube sheets are fixedly mounted on both sides of the inner wall of the shell. Several tube seat plates are fixedly inserted through the ends of the tube sheets. Several heat exchange tube bundles are arranged inside the shell, each consisting of a central heat exchange tube and four edge heat exchange tubes. Both ends of the central and edge heat exchange tubes penetrate the tube seat plates and are fixedly connected to them. A sliding cylinder is slidably mounted on the inner wall of the tube boxes. One sliding cylinder has several first connecting pieces through its end, and the other sliding cylinder has several second connecting pieces through its end, which can change the connectivity between the central and edge heat exchange tubes, as well as between the edge heat exchange tubes themselves.

[0009] As an optimized solution, the central heat exchange tube is located at the center of the tube base plate end, and the four edge heat exchange tubes are located at 0° / 90° / 180° / 270° positions at the end of the tube base plate, respectively. A central groove is provided at the center of the end of the first connecting member, and edge grooves are provided at the ends of the first connecting member at 0° / 45° / 90° / 135° / 315°. The edge grooves at the ends of the first connecting member at 0° / 90° / 315° are all connected to the central groove through straight grooves, and the other two edge grooves are connected through arc grooves. Through holes are provided at the ends of the first connecting member at 180° / 225° / 270°.

[0010] As an optimized solution, a central hole is provided at the center of the end of the second connecting member, and side grooves are provided at the 0° / 90° / 180° / 270° positions of the end of the second connecting member. The two side grooves at the 90° / 180° positions of the end of the second connecting member are connected to the two side grooves at the 0° / 270° positions through straight grooves.

[0011] As an optimized solution, the ports of both the central heat exchange tube and the edge heat exchange tube are flush with the end of the tube seat plate.

[0012] As an optimized solution, the upper outer wall and lower outer wall of the housing are respectively provided with a cold fluid outlet pipe and a cold fluid inlet pipe.

[0013] As an optimized solution, one of the pipe boxes has a hot fluid outlet pipe on its upper outer wall, and the other pipe box has a hot fluid inlet pipe on its lower outer wall.

[0014] As an optimized solution, a plurality of fixed cylinders are fixedly provided at the end of the pipe box, and a sliding column is provided in sliding seal on the inner wall of the fixed cylinder. A connecting shaft is fixedly connected to the end of the sliding column, and one end of the connecting shaft passes through the pipe box and is fixedly connected to the sliding cylinder.

[0015] As an optimized solution, a drive telescopic cylinder is fixedly provided on the inner wall of the fixed cylinder, and the telescopic end of the drive telescopic cylinder is fixedly connected to the sliding column.

[0016] As an optimized solution, a drive motor is fixedly provided at the end of the sliding cylinder, the output shaft of the drive motor extends into the interior of the sliding cylinder and is fixedly fitted with a gear, and the outer walls of the first connecting member and the second connecting member are both fixedly fitted with gear rings that mesh with the gear.

[0017] As an optimized solution, a protective cylinder is fixedly provided at the end of the sliding cylinder, and the drive motor is located inside the protective cylinder.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. By adjusting the position and angle of the first and second connecting parts, the connection between the central heat exchange tube and the edge heat exchange tube, as well as between each edge heat exchange tube, can be changed. This allows for adjustment of the cooling flow distance of the tube-side fluid. When the heat exchanger exchanges heat with tube-side fluids of different thermal properties, the actual cooling flow distance of the tube-side fluid can be adaptively adjusted according to the cooling requirements of the fluid. This enables the heat exchange process to adapt to the required heat exchange volume of different fluids, effectively avoiding the phenomenon of "overcooling" or "insufficient cooling" caused by a fixed process, and improving the applicability and heat exchange effect of the heat exchanger.

[0020] 2. The tube-side cooling flow distance of this heat exchanger can be adjusted to one tube pass, three tube passes, or five tube passes according to actual operating conditions. The wide adjustment range enhances the equipment's adaptability to different process conditions and heat load changes, thereby improving its applicability. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the internal structure of the housing of the present invention;

[0024] Figure 3 This is a schematic diagram of the internal structure of the pipe box of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the first connecting member of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the second connecting member of the present invention;

[0027] Figure 6 This is a schematic diagram of the internal structure of the left sliding cylinder of the present invention;

[0028] Figure 7 This is a schematic diagram of the internal structure of the sliding cylinder on the right side of the present invention;

[0029] Figure 8 This is a schematic diagram of the structure of the first / second connecting member and the tube seat plate when the fluid flows at the mid-range distance in the tube of the present invention;

[0030] Figure 9 This is a schematic diagram of the structure of the first / second connecting member and the pipe seat plate when the fluid flows over a long distance in the pipe according to the present invention;

[0031] Figure 10 This is a schematic diagram of the structure when the first / second connecting member of the present invention abuts against the tube seat plate.

[0032] In the diagram: 1-Pipe box; 2-Hot fluid outlet pipe; 3-Shell; 4-Hot fluid inlet pipe; 5-Cold fluid inlet pipe; 6-Pipe seat plate; 7-Pipe sheet; 8-Central heat exchanger tube; 9-Edge heat exchanger tube; 10-Heat exchanger tube bundle; 11-Cold fluid outlet pipe; 12-Sliding cylinder; 13-Through hole; 14-First connecting component; 15-Arc groove; 16-Central groove; 17-Edge groove; 18-Straight groove; 19-Straight groove; 20-Side groove; 21-Second connecting component; 22-Central hole; 23-Gear ring; 24-Protective cylinder; 25-Drive motor; 26-Gear; 27-Fixed cylinder; 28-Drive telescopic cylinder; 29-Sliding column; 30-Connecting shaft. Detailed Implementation

[0033] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0034] like Figures 1 to 10As shown, a high-throughput tube heat exchanger with adjustable tube length includes a shell 3. Tube boxes 1 are detachably mounted at both ends of the shell 3. Tube sheets 7 are fixedly mounted on both sides of the inner wall of the shell 3. Several tube seat plates 6 are fixedly inserted through the ends of the tube sheets 7. Several heat exchange tube bundles 10 are arranged inside the shell 3. Each heat exchange tube bundle 10 consists of a central heat exchange tube 8 and four edge heat exchange tubes 9. Both ends of the central heat exchange tube 8 and the edge heat exchange tubes 9 pass through the tube seat plates 6 and are fixedly connected to them. A sliding cylinder 12 is slidably mounted on the inner wall of the tube box 1. One end of the sliding cylinder 12 is provided with several first connecting parts 14 that are rotatably and sealingly connected to it. The other end of the sliding cylinder 12 is provided with several second connecting parts 21 that are rotatably and sealingly connected to it. The first connecting parts 14 and the second connecting parts 21 can change the communication between the central heat exchange tube 8 and the edge heat exchange tubes 9, as well as between the edge heat exchange tubes 9.

[0035] The central heat exchange tube 8 is located at the center of the end of the tube base plate 6. The four edge heat exchange tubes 9 are located at the 0° / 90° / 180° / 270° positions of the end of the tube base plate 6, respectively. The center of the end of the first connecting member 14 is provided with a central groove 16. The end of the first connecting member 14 is provided with edge grooves 17 at the positions of 0° / 45° / 90° / 135° / 315°. The edge grooves 17 at the positions of 0° / 90° / 315° of the end of the first connecting member 14 are connected to the central groove 16 through straight grooves 18. The other two edge grooves 17 are connected through arc grooves 15. The end of the first connecting member 14 is provided with through holes 13 at the positions of 180° / 225° / 270°.

[0036] The second connecting member 21 has a central hole 22 through it at the center of its end. The second connecting member 21 has side grooves 20 at the 0° / 90° / 180° / 270° positions. The two side grooves 20 at the 90° / 180° positions of the end of the second connecting member 21 are connected to the two side grooves 20 at the 0° / 270° positions through straight grooves 19.

[0037] The ends of the central heat exchange tube 8 and the edge heat exchange tube 9 are flush with the end of the tube seat plate 6.

[0038] The outer upper wall and the outer lower wall of the shell 3 are respectively provided with a cold fluid outlet pipe 11 and a cold fluid inlet pipe 5.

[0039] One of the pipe boxes 1 has a hot fluid outlet pipe 2 on its upper outer wall, and the other pipe box 1 has a hot fluid inlet pipe 4 on its lower outer wall.

[0040] Several fixed cylinders 27 are fixedly provided at the end of the pipe box 1. A sliding column 29 is provided on the inner wall of the fixed cylinder 27 for sliding sealing. A connecting shaft 30 is fixedly connected to the end of the sliding column 29. One end of the connecting shaft 30 passes through the pipe box 1 and is fixedly connected to the sliding cylinder 12.

[0041] A drive telescopic cylinder 28 is fixedly installed on the inner wall of the fixed cylinder 27, and the telescopic end of the drive telescopic cylinder 28 is fixedly connected to the sliding column 29.

[0042] A drive motor 25 is fixedly provided at the end of the sliding cylinder 12. The output shaft of the drive motor 25 extends into the interior of the sliding cylinder 12 and is fixedly fitted with a gear 26. The outer walls of the first connecting member 14 and the second connecting member 21 are both fixedly fitted with gear rings 23 that mesh with the gear 26.

[0043] A protective cylinder 24 is fixedly provided at the end of the sliding cylinder 12, and the drive motor 25 is located inside the protective cylinder 24.

[0044] The working principle of this device is as follows:

[0045] Cold fluid enters the shell 3 through cold fluid inlet pipe 5 and exits through cold fluid outlet pipe 11. The cold fluid in the shell 3 cools the central heat exchange tube 8 and the edge heat exchange tube 9. When the tube-side fluid cools the short-distance flow, the first connecting piece 14 and the second connecting piece 21 are separated from the tube seat plate 6. The sliding cylinder 12 is located on the side inside the tube box 1. Hot fluid enters one of the tube boxes 1 through hot fluid inlet pipe 4, flows through the central heat exchange tube 8 and the edge heat exchange tube 9 and then enters the other tube box 1. Finally, it is discharged through hot fluid outlet pipe 2. The hot fluid is cooled when it flows through the central heat exchange tube 8 and the edge heat exchange tube 9. The cooling flow distance of the tube-side fluid in this process is one tube-side.

[0046] During the mid-flow cooling process of the fluid in the tube, the sliding cylinder 12 slides, and both the first connecting member 14 and the second connecting member 21 abut against the tube seat plate 6 and form a seal, as shown in the figure. At one end, the central heat exchange tube 8 is connected to the central groove 16 of the first connecting member 14, and the two edge grooves 17 at the 0° / 90° position of the end of the first connecting member 14 are connected to the two edge heat exchange tubes 9 at the 0° / 90° position of the end of the tube seat plate 6, respectively. The two through holes 13 at the 180° / 270° position of the end of the first connecting member 14 are connected to the two edge heat exchange tubes 9 at the 180° / 270° position of the end of the tube seat plate 6, respectively. At the other end, the central heat exchange tube 8 is connected to the central hole 2 of the second connecting member 21. 2. The four edge heat exchange tubes 9 at the 0° / 90° / 180° / 270° positions at the end of the tube seat plate 6 are connected to the side grooves 20 at the 180° / 90° / 0° / 270° positions at the end of the second connecting member 21. The hot fluid in one tube box 1 flows through the central hole 22 through the central heat exchange tube 8, then through the two edge heat exchange tubes 9 at the 0° / 90° positions at the end of the tube seat plate 6, and then through the two edge heat exchange tubes 9 at the 180° / 270° positions at the end of the tube seat plate 6 before flowing into the other tube box 1 through the two through holes 13 at the 180° / 270° positions at the end of the first connecting member 14. The cooling flow distance of the tube-side fluid in this process is three tube passes.

[0047] When the fluid in the tube is cooled over a long distance, one drive motor 25 drives the first connecting member 14 to rotate 45°, and the other drive motor 25 drives the second connecting member 21 to rotate 90°, as shown in the figure. At one end, the angle positions of the end grooves and holes of the first connecting member 14 and the second connecting member 21 are redefined after rotation. The central heat exchange tube 8 is connected to the central groove 16 of the first connecting member 14. The three edge grooves 17 at the 0° / 90° / 180° positions at the end of the first connecting member 14 are connected to the three edge heat exchange tubes 9 at the 0° / 90° / 180° positions at the end of the tube seat plate 6. The through hole 13 at the 270° position at the end of the first connecting member 14 is connected to the edge heat exchange tube 9 at the 270° position at the end of the tube seat plate 6. At the other end, the central heat exchange tube 8 is connected to the second connecting member 21. The central hole 22 of the connecting member 21 is connected, and the four edge heat exchange tubes 9 at the 0° / 90° / 180° / 270° positions at the end of the tube seat plate 6 are connected to the side grooves 20 at the 180° / 90° / 0° / 270° positions at the end of the second connecting member 21. The hot fluid in one of the tube boxes 1 flows through the central hole 22 through the central heat exchange tube 8, then through the edge heat exchange tube 9 at the 0° position at the end of the tube seat plate 6, then through the edge heat exchange tube 9 at the 90° position at the end of the tube seat plate 6, then through the edge heat exchange tube 9 at the 180° position at the end of the tube seat plate 6, and finally through the edge heat exchange tube 9 at the 270° position at the end of the tube seat plate 6 and then through the through hole 13 at the 270° position at the end of the first connecting member 14 to the other tube box 1. The cooling flow distance of the tube-side fluid in this process is five tube passes.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A high-throughput tube heat exchanger with adjustable tube pass length, characterized in that: The device includes a shell (3), with detachable tube boxes (1) at both ends. Tube plates (7) are fixedly installed on both sides of the inner wall of the shell (3). Several tube seat plates (6) are fixedly installed through the ends of the tube plates (7). Several heat exchange tube bundles (10) are provided inside the shell (3). Each heat exchange tube bundle (10) consists of a central heat exchange tube (8) and four edge heat exchange tubes (9). Both ends of the central heat exchange tube (8) and the edge heat exchange tubes (9) are fixedly connected to the tube seat plates (6). A sliding cylinder (12) is slidably installed on the inner wall of the tube box (1). Several first connecting parts (14) are rotatably and sealed to one end of the sliding cylinder (12). Several second connecting parts (21) are rotatably and sealed to the other end of the sliding cylinder (12). The first connecting parts (14) and the second connecting parts (21) can change the communication between the central heat exchange tube (8) and the edge heat exchange tubes (9), as well as between each edge heat exchange tube (9). The central heat exchange tube (8) is located at the center of the end of the tube seat plate (6), and the four edge heat exchange tubes (9) are located at the 0° / 90° / 180° / 270° positions of the end of the tube seat plate (6). The center of the end of the first connecting member (14) is provided with a central groove (16), and the end of the first connecting member (14) is provided with edge grooves (17) at the positions of 0° / 45° / 90° / 135° / 315°. The edge grooves (17) at the positions of 0° / 90° / 315° of the end of the first connecting member (14) are all connected to the central groove (16) through straight grooves (18), and the other two edge grooves (17) are connected through arc grooves (15). The end of the first connecting member (14) is provided with through holes (13) at the positions of 180° / 225° / 270°. The second connecting member (21) has a central hole (22) at the center of its end. The end of the second connecting member (21) is provided with side grooves (20) at positions of 0° / 90° / 180° / 270°. The two side grooves (20) at positions of 90° / 180° at the end of the second connecting member (21) are connected to the two side grooves (20) at positions of 0° / 270° through straight grooves (19). The end of the pipe box (1) is fixedly provided with several fixed cylinders (27), and the inner wall of the fixed cylinder (27) is provided with a sliding column (29) for sliding sealing. The end of the sliding column (29) is fixedly connected with a connecting shaft (30). One end of the connecting shaft (30) passes through the pipe box (1) and is fixedly connected to the sliding cylinder (12). The inner wall of the fixed cylinder (27) is fixedly provided with a drive telescopic cylinder (28), and the telescopic end of the drive telescopic cylinder (28) is fixedly connected to the sliding column (29); The end of the sliding cylinder (12) is fixedly provided with a drive motor (25). The output shaft of the drive motor (25) extends into the interior of the sliding cylinder (12) and is fixedly fitted with a gear (26). The outer walls of the first connecting member (14) and the second connecting member (21) are both fixedly fitted with gear rings (23) that mesh with the gear (26).

2. A high-throughput tube heat exchanger with adjustable tube length according to claim 1, characterized in that: The ports of the central heat exchange tube (8) and the edge heat exchange tube (9) are flush with the end of the tube seat plate (6).

3. A high-throughput tube heat exchanger with adjustable tube length according to claim 1, characterized in that: The outer upper wall and the outer lower wall of the housing (3) are respectively provided with a cold fluid outlet pipe (11) and a cold fluid inlet pipe (5).

4. A high-throughput tube heat exchanger with adjustable tube length according to claim 1, characterized in that: One of the pipe boxes (1) has a hot fluid outlet pipe (2) on its upper outer wall, and the other pipe box (1) has a hot fluid inlet pipe (4) on its lower outer wall.

5. A high-throughput tube heat exchanger with adjustable tube length according to claim 1, characterized in that: The end of the sliding cylinder (12) is fixedly provided with a protective cylinder (24), and the drive motor (25) is located inside the protective cylinder (24).

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