A tube support structure for enhancing shell-side heat transfer in heat exchangers

Abstract

This utility model relates to the field of storage tank technology and discloses an inter-tube support structure for enhancing shell-side heat transfer in heat exchangers. The structure includes baffles, which are single, continuous, integral components. The guide surface of each baffle is a continuous spiral surface without seams, formed by multiple seamlessly connected spiral fan-shaped units. This utility model has the following advantages and effects: the baffle body is an inclined spiral surface, but each tube hole is a "vertical" straight cylindrical hole. This ensures that after multiple identical integral spiral baffles are coaxially installed inside the heat exchanger shell, the heat exchange tubes can smoothly and vertically pass through the corresponding tube holes on all the baffles, thus forming a continuous, smooth, and uninterrupted spiral flow channel on the shell side. These vibration-damping protrusions elastically contact the outer wall of the heat exchange tubes after they pass through, forming damping supports that effectively suppress tube bundle vibration, thereby improving the service life of the heat exchange tubes.

Description

Technical Field

[0001] This utility model relates to the field of storage tank technology, and in particular to an inter-tube support structure for enhancing heat transfer in the shell side of a heat exchanger. Background Technology

[0002] Heat exchangers are important equipment widely used in industries such as petrochemicals, energy and power, metallurgy, refrigeration, and seawater desalination. Currently, the spiral baffles used in actual engineering projects in the industry are mostly of a segmented structure, that is, the entire circumference is usually divided into four or more independent sector plates or "1 / 4 sector plates", which are arranged, spliced ​​and welded in sequence in the heat exchanger shell to approximately form a spiral flow channel.

[0003] In the prior art, Chinese Patent Publication No. CN100453951C discloses a combined spiral baffle shell-and-tube heat exchanger. Within the same pitch, the spiral baffles are divided into inner and outer parts radially along the shell. A discontinuous inner spiral form is used in the central region of the shell's internal space; a continuous outer spiral form is formed by annular spiral baffles with a continuous curved surface outside the central region, with the outer spiral baffles surrounding the inner spiral baffles. For horizontally installed heat exchangers, when the shell-side medium is prone to fouling, the adjacent outer continuous spiral baffles should be installed with the overlap position at the bottom of the heat exchanger, and a notch should be cut at the overlap of each outer spiral baffle, close to the outer edge of the shell. This invention ensures reasonable fluid flow on the shell side, reduces flow resistance, allows for timely fouling, improves heat exchange efficiency, and increases the service life of the heat exchanger. This invention also proposes two processing methods for the continuous spiral baffles to ensure the concentricity of the tube bundle holes on each continuous spiral baffle, facilitating the installation of the heat exchange tube bundle.

[0004] However, in actual use, the segmented structure of this invention results in a discontinuous, stepped flow channel in the circumferential direction. After each baffle plate passes through, the flow direction and velocity change abruptly at the joint where the fluid enters the next baffle plate, generating additional local resistance and eddies, leading to energy loss. Furthermore, the structural strength at the joint is lower than that of the baffle plate itself, and under the influence of fluid forces, this area may experience micro-vibrations. Utility Model Content

[0005] The purpose of this invention is to provide an inter-tube support structure that enhances heat transfer in the shell side of a heat exchanger, effectively suppressing tube bundle vibration.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a tube support structure for enhancing shell-side heat transfer in a heat exchanger, comprising a baffle plate, wherein the baffle plate is a single continuous integral component, and its guiding surface is a continuous spiral curved surface without splicing gaps. The continuous spiral curved surface is composed of multiple spiral fan-shaped units seamlessly connected together. The number of spiral fan-shaped units is four, and the spiral fan-shaped units are connected together by welding. The baffle plate has tube holes, and the central axis of the tube holes is parallel to the central axis of the baffle plate. A heat exchange tube passes through the inner wall of the tube holes. An anti-vibration groove is formed on the inner wall of the tube holes. An anti-vibration protrusion is fixedly connected to the inner wall of the anti-vibration groove, and a damping layer is fixedly connected to the outer surface of the anti-vibration protrusion.

[0007] By adopting the above technical solution, the sides of the four spiral fan-shaped units are precisely machined before connection to ensure perfect surface continuity after docking. They are permanently connected at their joints by welding. After connection, the weld is ground and polished to make the spiral surface of the entire baffle plate smooth and seamless. This completely eliminates the triangular leakage area of ​​traditional segmented baffle plates in terms of structure and function. Although the baffle plate body is an inclined spiral surface, each tube hole on it is a "vertical" straight tube hole. This ensures that after multiple integral spiral baffle plates of the same type are coaxially installed in the heat exchanger shell, the heat exchange tubes can smoothly and vertically pass through the corresponding tube holes on all the baffle plates, thus forming a continuous, smooth, and uninterrupted spiral flow channel on the shell side. These anti-vibration protrusions elastically contact the outer wall of the heat exchange tubes after they are inserted, forming damping support, effectively suppressing tube bundle vibration, and thus improving the service life of the heat exchange tubes.

[0008] A further feature of this invention is that the outer surface of the baffle plate is coated with a ceramic coating, and the outer surface of the ceramic coating is coated with a polytetrafluoroethylene coating.

[0009] By adopting the above technical solutions, the coating and microstructure surface greatly enhance the anti-corrosion and anti-scaling capabilities.

[0010] A further feature of this invention is that a heat-conducting layer is fixedly connected to the outer surface of the heat exchange tube, and a wear-resistant coating is provided on the outer surface of the heat-conducting layer.

[0011] By adopting the above technical solution, the surface of the heat-conducting layer is protected by a wear-resistant coating.

[0012] A further feature of this invention is that the outer surface of the wear-resistant coating is coated with a hydrophobic layer, and the number of the hydrophobic layers is two.

[0013] By adopting the above technical solution, the hydrophobic layer prevents scale from condensing on the surface of the heat exchange tube.

[0014] A further feature of this invention is that the multiple integral spiral baffles are parallel to each other and coaxially arranged, forming a continuous spiral flow channel within the shell side.

[0015] By adopting the above technical solution, the spiral flow channel makes it difficult for impurities to accumulate, greatly reducing the risk of scale buildup in the heat exchanger.

[0016] A further feature of this invention is that the pitch of the continuous helical surface is a constant value, and the tube hole has a straight cylindrical wall.

[0017] By adopting the above technical solution, the tube hole is straight-cylinder type, which facilitates the insertion of heat exchange tubes.

[0018] A further feature of this invention is that the number of the vibration-damping protrusions is eight, and the eight vibration-damping protrusions are arranged in a circular array.

[0019] By adopting the above technical solution, the vibration-resistant protrusions are evenly distributed and equidistant.

[0020] A further feature of this invention is that the eight anti-vibration protrusions are made of non-metallic material, and all eight anti-vibration protrusions are the same size.

[0021] By adopting the above technical solution, the vibration-resistant protrusion has a damping layer and does not wear down the surface of the heat exchange tube.

[0022] A further feature of this invention is that the outer circumferential edge of the baffle plate is adapted to the shape of the inner wall of the heat exchanger shell.

[0023] By adopting the above technical solution, the baffle plate and the heat exchanger shell can be perfectly matched.

[0024] A further feature of this invention is that a gap is left between the baffle plate and the inner wall of the heat exchanger shell.

[0025] By adopting the above technical solutions, the gap after assembly is small, the manufacturing precision is high, and the final performance is guaranteed.

[0026] The beneficial effects of this utility model are:

[0027] 1. This utility model, through the coordinated arrangement of baffles, spiral fan-shaped units, tube holes, heat exchange tubes, anti-vibration grooves, anti-vibration protrusions, and damping layers, ensures that the spiral surface of the entire baffle is smooth and seamless during use. This completely eliminates the triangular leakage area of ​​traditional segmented baffles in terms of structure and function. Although the baffle body is an inclined spiral surface, each tube hole is a "vertical" straight cylindrical hole, ensuring that after multiple identical integral spiral baffles are coaxially installed inside the heat exchanger shell, the heat exchange tubes can smoothly and vertically pass through the corresponding tube holes on all baffles, thus forming a continuous, smooth, and uninterrupted spiral flow channel on the shell side. These anti-vibration protrusions, after the heat exchange tubes penetrate, elastically contact their outer wall, forming damping supports that effectively suppress tube bundle vibration, thereby improving the service life of the heat exchange tubes.

[0028] 2. This utility model, through the coordinated arrangement of ceramic coating, polytetrafluoroethylene coating, thermally conductive layer, wear-resistant coating, and hydrophobic layer, enables the coating and microstructure surface to greatly enhance corrosion resistance and scale prevention during use. The surface of the thermally conductive layer is protected by the wear-resistant coating, the hydrophobic layer prevents scale from condensing on the surface of the heat exchange tube, the spiral flow channel makes it difficult for impurities to deposit, greatly reducing the risk of scale formation in the heat exchanger, the tube holes are straight cylindrical to facilitate the insertion of heat exchange tubes, the vibration-resistant protrusions are evenly distributed and equidistant, the baffles can fit perfectly with the heat exchanger shell, the gap after assembly is small, the manufacturing precision is high, and the final performance is guaranteed. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of this utility model;

[0031] Figure 2 This is a schematic diagram of the vibration-resistant protrusion structure of this utility model;

[0032] Figure 3 This is a schematic diagram of the ceramic coating structure of this utility model;

[0033] Figure 4 This is a schematic diagram of the hydrophobic layer structure of this utility model.

[0034] In the figure, 1 is a baffle plate; 2 is a spiral fan-shaped unit; 3 is a tube hole; 4 is a heat exchange tube; 5 is a vibration-damping groove; 6 is a vibration-damping protrusion; 7 is a damping layer; 8 is a ceramic coating; 9 is a polytetrafluoroethylene coating; 10 is a thermally conductive layer; 11 is a wear-resistant coating; and 12 is a hydrophobic layer. Detailed Implementation

[0035] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0036] A tube support structure for enhancing shell-side heat transfer in a heat exchanger includes the following embodiments:

[0037] Example 1:

[0038] Reference Figure 1-4 The baffle plate 1 is a single continuous integral component. Its flow guiding surface is a continuous spiral curved surface without splicing gaps. The continuous spiral curved surface is composed of multiple spiral fan-shaped units 2 seamlessly connected. There are 4 spiral fan-shaped units 2. The spiral fan-shaped units 2 are connected as a whole by welding. The baffle plate 1 has a pipe hole 3. The central axis of the pipe hole 3 is parallel to the central axis of the baffle plate 1. The heat exchange tube 4 passes through the inner wall of the pipe hole 3. The inner wall of the pipe hole 3 has an anti-vibration groove 5. The inner wall of the anti-vibration groove 5 is fixedly connected to an anti-vibration protrusion 6. The outer surface of the anti-vibration protrusion 6 is fixedly connected to a damping layer 7.

[0039] Specifically, before the four spiral fan-shaped units 2 are connected, their sides are precision machined to ensure that a perfect curved surface continuity can be formed after docking. They are permanently connected at their joints by welding. After the connection is completed, the weld is ground and polished to make the spiral curved surface of the entire baffle 1 smooth and seamless. The triangular leakage area of ​​the traditional segmented baffle is completely eliminated from the structure and function. Although the baffle body is an inclined spiral surface, each tube hole 3 on it is a "vertical" straight tube hole. This ensures that after multiple integral spiral baffles 1 of the same type are coaxially installed in the heat exchanger shell, the heat exchange tube 4 can smoothly and vertically pass through the corresponding tube holes 3 on all the baffles, thereby forming a continuous, smooth, and uninterrupted spiral flow channel on the shell side. After the heat exchange tube 4 is inserted, these anti-vibration protrusions 6 make elastic contact with its outer wall to form damping support, effectively suppressing tube bundle vibration and thus improving the service life of the heat exchange tube 4.

[0040] Example 2:

[0041] Reference Figure 1-4The outer surface of the baffle plate 1 is coated with a ceramic coating 8, and the outer surface of the ceramic coating 8 is coated with a polytetrafluoroethylene coating 9. The outer surface of the heat exchange tube 4 is fixedly connected with a heat-conducting layer 10, and the outer surface of the heat-conducting layer 10 is provided with a wear-resistant coating 11. The outer surface of the wear-resistant coating 11 is coated with a hydrophobic layer 12. There are two hydrophobic layers 12. Multiple integral spiral baffle plates 1 are parallel to each other and coaxially arranged, forming a continuous spiral flow channel in the shell side. The pitch of the continuous spiral surface is a constant value. The tube hole 3 has a straight cylindrical hole wall. There are eight anti-vibration protrusions 6. The eight anti-vibration protrusions 6 are arranged in a circular array. The material of the eight anti-vibration protrusions 6 is non-metallic. The eight anti-vibration protrusions 6 are all the same size. The outer circumferential edge of the baffle plate 1 is adapted to the shape of the inner wall of the heat exchanger shell. A gap is left between the baffle plate 1 and the inner wall of the heat exchanger shell.

[0042] Specifically, the coating and microstructure surface greatly enhance the corrosion resistance and scale prevention capabilities. The surface of the heat-conducting layer 10 is protected by the wear-resistant coating 11, the hydrophobic layer 12 prevents scale from condensing on the surface of the heat exchange tube 4, the spiral flow channel makes it difficult for impurities to deposit, greatly reducing the risk of scale buildup in the heat exchanger, the tube hole 3 is a straight cylindrical type to facilitate the insertion of the heat exchange tube 4, the vibration-resistant protrusions 6 are evenly distributed and equidistant, the baffle plate 1 can fit perfectly with the heat exchanger shell, the gap after assembly is small, the manufacturing precision is high, and the final performance is guaranteed.

[0043] In this invention, the spiral surface of the entire baffle plate 1 is smooth and seamless, completely eliminating the triangular leakage area of ​​traditional segmented baffle plates in terms of structure and function. Although the baffle plate body is an inclined spiral surface, each pipe hole 3 on it is a "vertical" straight cylindrical hole, ensuring that after multiple integral spiral baffle plates 1 of the same type are coaxially installed in the heat exchanger shell, the heat exchange tubes 4 can smoothly and vertically pass through the corresponding pipe holes 3 on all baffle plates, thereby forming a continuous, smooth, and uninterrupted spiral flow channel on the shell side. These anti-vibration protrusions 6, after the heat exchange tubes 4 are inserted, elastically contact their outer wall to form damping support, effectively suppressing tube bundle vibration, thereby improving the service life of the heat exchange tubes 4. The coating and microstructure surface greatly enhance corrosion resistance and The heat-conducting layer 10 is protected by a wear-resistant coating 11, and the hydrophobic layer 12 prevents scale buildup on the surface of the heat exchange tube 4. The spiral flow channel makes it difficult for impurities to deposit, greatly reducing the risk of scale buildup in the heat exchanger. The tube hole 3 is a straight cylindrical type, which facilitates the insertion of the heat exchange tube 4. The vibration-resistant protrusions 6 are evenly distributed and equidistant. The baffle plate 1 can fit snugly with the heat exchanger shell, resulting in a small gap after assembly. The manufacturing precision is high, ensuring the final performance. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tube support structure for enhancing shell-side heat transfer in a heat exchanger, comprising baffles (1), characterized in that: The baffle plate (1) is a single continuous integral component, and its flow guiding surface is a continuous spiral curved surface without splicing gaps. The continuous spiral curved surface is composed of multiple spiral fan-shaped units (2) seamlessly connected. The number of spiral fan-shaped units (2) is 4. The spiral fan-shaped units (2) are connected as a whole by welding. The baffle plate (1) is provided with a pipe hole (3). The central axis of the pipe hole (3) is parallel to the central axis of the baffle plate (1). The inner wall of the pipe hole (3) is provided with a heat exchange tube (4). The inner wall of the pipe hole (3) is provided with an anti-vibration groove (5). The inner wall of the anti-vibration groove (5) is fixedly connected with an anti-vibration protrusion (6). The outer surface of the anti-vibration protrusion (6) is fixedly connected with a damping layer (7).

2. The tube support structure for enhancing shell-side heat transfer in a heat exchanger according to claim 1, characterized in that: The outer surface of the baffle (1) is coated with a ceramic coating (8), and the outer surface of the ceramic coating (8) is coated with a polytetrafluoroethylene coating (9).

3. The tube support structure for enhancing shell-side heat transfer in a heat exchanger according to claim 2, characterized in that: A heat-conducting layer (10) is fixedly connected to the outer surface of the heat exchange tube (4), and a wear-resistant coating (11) is provided on the outer surface of the heat-conducting layer (10).

4. The tube support structure for enhancing shell-side heat transfer in a heat exchanger according to claim 3, characterized in that: The outer surface of the wear-resistant coating (11) is coated with a hydrophobic layer (12), and the number of hydrophobic layers (12) is two.

5. The tube support structure for enhancing shell-side heat transfer in a heat exchanger according to claim 1, characterized in that: The multiple integral spiral baffles (1) are parallel to each other and coaxially arranged, forming a continuous spiral flow channel in the shell side.

6. The tube support structure for enhancing shell-side heat transfer in a heat exchanger according to claim 1, characterized in that: The pitch of the continuous helical surface is a constant value, and the tube hole (3) has a straight cylindrical hole wall.

7. The tube support structure for enhancing shell-side heat transfer in a heat exchanger according to claim 1, characterized in that: The number of the vibration-damping protrusions (6) is eight, and the eight vibration-damping protrusions (6) are arranged in a circular array.

8. The tube support structure for enhancing shell-side heat transfer in a heat exchanger according to claim 1, characterized in that: The eight vibration-damping protrusions (6) are made of non-metallic material, and all eight vibration-damping protrusions (6) are the same size.

9. The tube support structure for enhancing shell-side heat transfer in a heat exchanger according to claim 1, characterized in that: The outer circumferential edge of the baffle (1) is adapted to the shape of the inner wall of the heat exchanger shell.

10. The tube support structure for enhancing shell-side heat transfer in a heat exchanger according to claim 1, characterized in that: The baffle (1) has a gap with the inner wall of the heat exchanger shell.

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