A heat exchanger to prevent media leakage

Abstract

This invention provides a heat exchanger for preventing medium leakage, comprising a horizontally arranged cylindrical body, and a first tube box and a second tube box detachably connected to both ends of the cylindrical body. Multiple baffles are arranged inside the cylindrical body from one end to the other. A first tube sheet is disposed between the first tube box and the cylindrical body, and a second tube sheet is disposed between the second tube box and the cylindrical body. Heat exchange tubes connecting the first and second tube sheets are disposed between the first and second tube sheets. Fixing members are detachably connected to the first or second tube sheet, and the baffles are also detachably connected to the fixing members. Each baffle is also connected to a sealing strip positioned close to the inner wall of the cylindrical body. This invention avoids leakage dead zones by sealing the gaps at the baffles with sealing strips, thus solving the problem in the prior art where smaller baffles, designed to facilitate the insertion of heat exchange tube bundles, lead to leakage dead zones between the baffles and the inner wall of the cylindrical body.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange equipment technology, and in particular to a heat exchanger that prevents medium leakage. Background Technology

[0002] Heat exchange equipment is widely used in the chemical industry. In chemical plants, shell-and-tube heat exchangers are the most commonly used heat exchange equipment in industries such as chemical processing and oil refining. They have advantages such as robustness, durability, high reliability, strong applicability, and wide material selection. Shell-and-tube heat exchangers consist of a shell and heat exchange tube bundles installed inside. To increase the turbulence of the shell-side medium, improve the shell-side heat transfer coefficient, and reduce fouling, a certain number of baffles are usually installed inside the shell structure of the heat exchanger. In actual use, the service life of the heat exchange tube bundles is relatively short. To reduce the overall equipment cost, companies adopt a replaceable heat exchange tube bundle structure, so that it can be used normally again after replacement. However, in order to facilitate the entry and exit of the heat exchange tube bundles into and out of the shell during replacement, the size of the baffles is usually smaller than the inner diameter of the shell to avoid deformation of the baffles caused by forcibly pushing the heat exchange tube bundles in, which could lead to equipment deformation and scrapping in severe cases. If the baffle plate is too small during operation, there will be a large gap between it and the inner wall of the cylinder. This will cause a dead zone of leakage in the medium at the gap, and at the same time, sediment will be generated, which is very detrimental to heat exchange. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a heat exchanger that prevents medium leakage. It solves the problem in existing technologies where the baffles are set too small to facilitate the insertion of the heat exchange tube bundle, which leads to a dead zone of leakage between the baffles and the inner wall of the cylinder.

[0004] According to an embodiment of the present invention, a heat exchanger for preventing medium leakage includes a horizontally arranged cylindrical body, and a first tube box and a second tube box detachably connected to both ends of the cylindrical body. The cylindrical body is also provided with a plurality of baffles arranged from one end to the other. A first tube sheet is also provided between the first tube box and the cylindrical body, and a second tube sheet is also provided between the second tube box and the cylindrical body. A heat exchange tube connecting the first tube box and the second tube sheet is also provided between the first tube sheet and the second tube sheet. A fixing member is detachably connected to the first tube sheet or the second tube sheet, and the baffles are also detachably connected to the fixing member. Each baffle is also connected to a sealing strip disposed close to the inner wall of the cylindrical body. The sealing strip, baffle, and fixing components form an integrated structure with the first tube sheet (or second tube sheet). When replacement is needed, they can be pulled out together, and the corresponding heat exchange tubes and other components can be replaced before being pushed back in. During operation, the sealing strip can seal the gap between the baffle and the inner wall of the cylinder, thereby avoiding the formation of a leakage dead zone. This solves the problem in the prior art where the baffle is set too small to facilitate the insertion of the heat exchange tube bundle, which leads to a leakage dead zone between the baffle and the inner wall of the cylinder.

[0005] Furthermore, multiple baffles are equidistantly arranged above and below the cylinder.

[0006] Furthermore, the fixing component includes a first fixing rod and a second fixing rod located above and below the cylinder body, respectively, and the first fixing rod and the second fixing rod are respectively connected to the baffle plate located above and the baffle plate located below.

[0007] Furthermore, the fixing component also includes a third fixing rod located in the middle section of the cylinder, which is connected to all the baffles.

[0008] Furthermore, the upper baffle plate is provided with a first through hole for the heat exchange tube to pass through, and a second through hole and a third through hole for the first fixing rod and the third fixing rod to pass through. The lower baffle plate is provided with a fourth through hole and a fifth through hole for the second fixing rod and the third fixing rod to pass through.

[0009] Furthermore, the sealing strip includes a connecting section fixedly connected to the baffle plate and a sealing section perpendicular to the connecting section, the sealing section being close to the inner wall of the cylinder.

[0010] Furthermore, the connecting section and the sealing section are located on one side or the other side of the baffle plate near the first tube sheet.

[0011] Furthermore, bases are fixedly connected to both ends of the cylinder.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] By sealing the gaps at the baffle plate with a sealing strip, leakage dead zones are avoided, thus solving the problem in the prior art where the baffle plate is set too small to facilitate the insertion of the heat exchange tube bundle, which leads to leakage dead zones between the baffle plate and the inner wall of the cylinder. At the same time, the baffle plate, sealing strip, fixing parts and the first tube sheet (or second tube sheet) are integrated into one structure, which can be easily pulled out and pushed in, thereby facilitating the inspection and maintenance of the heat exchange tubes. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0015] Figure 2 This is a partially enlarged schematic diagram of the baffle, sealing strip, and cylinder in an embodiment of the present utility model;

[0016] In the above attached figures:

[0017] 1. Shell body; 2. First tube box; 3. Second tube box; 4. Base; 5. Baffle plate; 6. First tube sheet; 7. Second tube sheet; 8. Heat exchange tube; 9. Sealing strip; 10. Connecting section; 11. Sealing section; 12. First fixing rod; 13. Second fixing rod; 14. Third fixing rod. Detailed Implementation

[0018] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] In an exemplary implementation, such as Figure 1 , 2As shown, this embodiment provides a heat exchanger to prevent medium leakage, which includes a horizontally arranged cylinder 1, and a first tube box 2 and a second tube box 3 detachably connected to both ends of the cylinder 1. Bases 4 are fixedly connected to both ends of the cylinder 1 to ensure stable placement on a mounting foundation (such as a mounting bracket). Similar to existing technologies, to increase turbulence, multiple baffles 5 are arranged inside the cylinder 1 from one end to the other. The baffles 5 can be multiple baffles arranged at equal intervals near the upper and lower inner walls of the cylinder 1. A first tube sheet 6 is also provided between the first tube box 2 and the cylinder 1, and a second tube sheet 7 is also provided between the second tube box 3 and the cylinder 1. Heat exchange tubes 8 (multiple heat exchange tubes 8, forming a heat exchange tube bundle as in the prior art) are also provided between the first tube sheet 6 and the second tube sheet 7, connecting the first tube box 2 and the second tube box 3. Alternatively, a fixing component can be detachably connected to the second tube sheet 7, and the baffle 5 can also be detachably connected to the fixing component. Each baffle 5 is also connected to a sealing strip 9 that is close to the inner wall of the cylinder 1. The sealing strip 9 and the baffle 5 can be welded together, and the sealing strip 9 and the inner wall of the cylinder 1 can be separated but close together (or in sliding contact), thereby sealing the gap between the baffle 5 and the cylinder 1 (while not affecting normal pushing and pulling), ultimately avoiding the formation of a leakage dead zone. This solves the problem in the prior art where the baffle 5 is set too small to facilitate the pushing of the heat exchange tube bundle, which leads to a leakage dead zone between the baffle 5 and the inner wall of the cylinder 1. At the same time, the baffle 5, sealing strip 9, fixing component, and the first tube sheet 6 (or the second tube sheet 7) are an integrated structure, which can be easily pulled out and pushed in, thereby facilitating the inspection and maintenance of the heat exchange tube 8.

[0021] like Figure 1 , 2 As shown, in a more detailed scheme, the sealing strip 9 includes a connecting section 10 fixedly connected to the baffle plate 5 and a blocking section 11 perpendicular to the connecting section 10. The blocking section 11 is close to the inner wall of the cylinder 1 (the blocking section 11 and the inner wall of the cylinder 1 can also be in sliding contact). That is, the blocking section 11 can be an arc-shaped plate close to the inner wall of the cylinder 1, which can play an auxiliary role in the process of pushing in or pulling out, making the process of pushing in or pulling out smoother and avoiding direct collision between the baffle plate 5 and the inner wall of the cylinder 1. More specifically, the connecting section 10 and the blocking section 11 can be located on both sides of the baffle plate 5.

[0022] like Figure 1As shown, the fasteners are used to improve the integrity between the baffles 5 and the first tube sheet 6 (or the second tube sheet 7), thereby facilitating later maintenance. Specifically, the fasteners include a first fixing rod 12, a second fixing rod 13, and a third fixing rod 14 located at the top, bottom, and middle positions inside the cylinder 1, respectively. The first fixing rod 12 and the second fixing rod 13 are connected to the upper baffles 5 and the lower baffles 5, respectively, while the third fixing rod 14 located in the middle is connected to all the baffles 5. More specifically, the upper baffles 5 are provided with a first through hole for the heat exchange tubes 8 to pass through, and a second through hole and a third through hole for the first fixing rod 12 and the third fixing rod 14 to pass through. The lower baffles 5 are provided with a fourth through hole and a fifth through hole for the second fixing rod 13 and the third fixing rod 14 to pass through (the lower baffles 5 can also be provided with a first through hole so that a corresponding heat exchange tube 8 can also be installed at that location). That is, the baffles 5 can be connected to the fasteners and the heat exchange tubes 8 through these through holes.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A heat exchanger for preventing leakage of a medium, characterized by comprising: The device includes a horizontally arranged cylindrical body, and a first tube box and a second tube box that are detachably connected to both ends of the cylindrical body. The cylindrical body is also equipped with multiple baffles arranged from one end to the other. A first tube sheet is also provided between the first tube box and the cylindrical body, and a second tube sheet is also provided between the second tube box and the cylindrical body. A heat exchange tube connecting the first tube box and the second tube sheet is also provided between the first tube sheet and the second tube sheet. A fixing element can also be detachably connected to the first tube sheet or the second tube sheet. The baffles are also detachably connected to the fixing element. Each baffle is also connected to a sealing strip that is close to the inner wall of the cylindrical body.

2. The heat exchanger for preventing medium leakage according to claim 1, wherein Multiple baffles are equidistantly arranged above and below the cylinder.

3. The heat exchanger for preventing medium leakage according to claim 2, wherein The fixing components include a first fixing rod and a second fixing rod located above and below the cylinder body, respectively, and the first fixing rod and the second fixing rod are connected to the baffle plate located above and the baffle plate located below, respectively.

4. The heat exchanger of claim 3, wherein The fixing components also include a third fixing rod located in the middle section of the cylinder, which is connected to all the baffles.

5. The heat exchanger for preventing medium leakage as described in claim 4, characterized in that, The upper baffle plate is provided with a first through hole for the heat exchange tube to pass through, and a second through hole and a third through hole for the first fixing rod and the third fixing rod to pass through. The lower baffle plate is provided with a fourth through hole and a fifth through hole for the second fixing rod and the third fixing rod to pass through.

6. The heat exchanger for preventing leakage of medium according to any one of claims 1 to 5, wherein The sealing strip includes a connecting section fixedly connected to the baffle plate and a sealing section perpendicular to the connecting section, the sealing section being close to the inner wall of the cylinder.

7. The heat exchanger of claim 6, wherein The connecting section and the sealing section are located on one side or the other side of the baffle plate near the first tube sheet.

8. The heat exchanger of claim 1, wherein The cylinder is also fixedly connected to bases at both ends.

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