A shell-and-tube water-to-water heat exchanger

Abstract

This utility model discloses a shell-and-tube water-to-water heat exchanger belonging to the technical field of heat exchangers. It includes a cylindrical body and a cylindrical section, with a tube sheet between the body and the section, and a sealed connection via flange bolts. A partition inside the cylindrical section divides it into a first medium inlet chamber and a first medium outlet chamber. The body has a second medium inlet pipe and a second medium outlet pipe. An anti-impact plate is welded to the inner wall of the body below the second medium inlet pipe. Multiple U-shaped heat exchange tubes are installed inside the body, with both ends of each U-shaped tube penetrating through corresponding holes in the tube sheet and sealed. At least five baffles are arranged equidistantly along the axial direction of the body, with adjacent baffles staggered circumferentially. The baffles have corresponding holes for the U-shaped heat exchange tubes. The surface of the U-shaped heat exchange tubes has spiral microribs, increasing the contact area between the fluid and the tube surface and improving the heat transfer coefficient.

Description

Technical Field

[0001] This utility model belongs to the field of heat exchanger technology, specifically relating to a shell-and-tube water-to-water heat exchanger. Background Technology

[0002] Shell-and-tube heat exchangers are a common type of heat exchange equipment, widely used in cooling and heating processes in industrial production. Traditional shell-and-tube heat exchangers struggle to effectively guide fluids into turbulence, resulting in low heat exchange efficiency, especially when handling high-flow-rate fluids. Furthermore, the direct impact of high-speed fluids on the heat exchange tubes can easily cause erosion and damage, affecting the equipment's lifespan.

[0003] To address the aforementioned problems, this utility model proposes an improved shell-and-tube water-to-water heat exchanger, which improves heat exchange efficiency and enhances the stability and reliability of the equipment. Summary of the Invention

[0004] To address the aforementioned problems, this utility model discloses a shell-and-tube water-to-water heat exchanger with a simple structure. The U-shaped heat exchange tube has spiral microribs on its surface, which increases the contact area between the fluid and the surface of the heat exchange tube, further enhancing the turbulence effect and improving the heat transfer coefficient. By welding an anti-impact plate to the inner wall of the cylinder below the second medium inlet pipe, the impact force of the high-speed fluid is effectively dispersed, preventing the heat exchange tube from being eroded and damaged, and extending the service life of the heat exchange tube.

[0005] To achieve the above objectives, the specific technical solution of this application is as follows: A shell-and-tube water-to-water heat exchanger includes a cylindrical body and a cylindrical section. A tube sheet is provided between the body and the cylindrical section, and they are sealed and connected by flange bolts. A partition is provided inside the cylindrical section to divide it into a first medium inlet chamber and a first medium outlet chamber. A second medium inlet pipe and a second medium outlet pipe are provided on the body. An anti-impact plate is welded to the inner wall of the body below the second medium inlet pipe. Multiple U-shaped heat exchange tubes are provided inside the body. The two ends of the U-shaped heat exchange tubes pass through the tube sheet through the corresponding tube holes of the first medium inlet chamber and the first medium outlet chamber, respectively, and are sealed and fixed. At least five baffles are provided inside the body, which are equidistantly arranged along the axial direction of the body. Adjacent baffles are staggered circumferentially. The baffles have tube holes corresponding to the U-shaped heat exchange tubes. The U-shaped heat exchange tubes pass through the tube holes and are sealed and fitted with the tube holes. The outer edge of the baffles is welded and fixed to the inner wall of the body.

[0006] Based on the above technical features, preferably, the anti-impact plate is a downwardly curved titanium alloy arc plate, and the arc plate is provided with an array of through holes to disperse the impact of the high-speed second medium and prevent the U-shaped heat exchange tube from being eroded and damaged.

[0007] Based on the above technical features, preferably, a sealing gasket is provided between the tube sheet and the flange.

[0008] Based on the above technical features, preferably, the U-shaped heat exchange tube is a titanium alloy tube with spiral microribs on its surface, which improves heat exchange efficiency.

[0009] Based on the above technical features, preferably, each baffle has a central angle of 90° and is staggered circumferentially by 15°–30° to form a continuous spiral flow channel.

[0010] Based on the above technical features, preferably, the baffle plate, tube sheet and U-shaped heat exchange tube are sealed by filling with sealant or by using an expansion joint to prevent fluid leakage.

[0011] Based on the above technical features, preferably, two saddles are provided below the cylinder to distribute the cylinder load and suppress vibration stress.

[0012] Compared with the prior art, the beneficial effects of this application are as follows: This application welds an anti-impact plate to the inner wall of the cylinder below the second medium inlet pipe, which effectively disperses the impact force of high-speed fluid, prevents the heat exchange tube from being washed away and damaged, and extends the service life of the heat exchange tube. By staggering the baffles to form a continuous spiral flow channel, the fluid can be effectively guided to form a spiral flow, increasing the residence time and turbulence of the fluid in the shell side, thereby significantly improving the heat transfer efficiency. The U-shaped heat exchange tube has spiral micro-ribs on its surface, which increases the contact area between the second medium and the surface of the heat exchange tube, further enhancing the turbulence effect and improving the heat transfer coefficient. The baffles, tube sheet and heat exchange tubes are sealed by filling with sealant or by expansion joint, which enhances the reliability of the seal and effectively prevents fluid leakage, especially suitable for high temperature and high pressure conditions. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a shell-and-tube water-to-water heat exchanger according to the present invention; Figure 2 This is a schematic diagram of the structure of the tube sheet of this utility model; Figure 3 This is a schematic diagram of the anti-impact plate in this utility model; List of identifiers in attached diagrams: 1. Shell; 2. Shell section; 21. First medium inlet chamber; 22. First medium outlet chamber; 3. Tube sheet; 31. Tube hole; 4. Flange; 5. Baffle plate; 6. Second medium inlet pipe; 7. Second medium outlet pipe; 8. U-shaped heat exchange tube; 9. Baffle plate; 10. Anti-impact plate; 11. Saddle; 12. Gasket. Detailed Implementation

[0014] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0015] It should be noted that the terms "upper," "lower," "left," "right," "front," and "rear" used in the following description refer to the directions shown in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. Furthermore, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0016] like Figure 1 As shown, a shell-and-tube water heat exchanger includes a cylindrical body 1 and a cylindrical section 2. A tube sheet 3 is provided between the body 1 and the cylindrical section 2 and is connected by a flange 4 and bolts for sealing. A partition 5 is provided inside the cylindrical section 2 to divide the cylindrical section 2 into a first medium inlet chamber 21 and a first medium outlet chamber 22. A sealing gasket 12 is provided between the tube sheet 3 and the flange 4.

[0017] The cylinder 1 is provided with a second medium inlet pipe 6 and a second medium outlet pipe 7. An anti-impact plate 10 is welded to the inner wall of the cylinder below the second medium inlet pipe 6. Multiple U-shaped heat exchange tubes 8 are provided inside the cylinder 1. The two ends of the U-shaped heat exchange tubes 8 pass through the tube holes 31 on the tube sheet 3 corresponding to the first medium inlet chamber 21 and the first medium outlet chamber 22, respectively, and are sealed and fixed. At least five baffles 9 are provided inside the cylinder 1, which are equidistantly arranged along the axial direction of the cylinder 1. Adjacent baffles 9 are staggered circumferentially. The baffles 9 are provided with tube holes corresponding to the U-shaped heat exchange tubes 8. The U-shaped heat exchange tubes 8 pass through the tube holes and are sealed and fitted with the tube holes. The outer edge of the baffles 9 is welded and fixed to the inner wall of the cylinder 1.

[0018] Preferably, the anti-impact plate 10 is a downwardly curved titanium alloy arc plate with an array of through holes to disperse the impact of the high-speed second medium and prevent the U-shaped heat exchange tube 8 from being eroded and damaged.

[0019] Preferably, the U-shaped heat exchange tube 8 is a titanium alloy tube with spiral microribs on its surface, which improves heat exchange efficiency.

[0020] Preferably, each baffle 9 has a central angle of 90° and is staggered circumferentially by 15°–30° to form a continuous spiral flow channel.

[0021] Preferably, the baffle plate 9, tube sheet 3 and U-shaped heat exchange tube 8 are sealed with sealant or by expansion joint to prevent fluid leakage.

[0022] Two saddles 11 are provided below the cylinder 1 to distribute the load on the cylinder and suppress vibration stress.

[0023] Working principle: The first medium enters the cylindrical section 2 through the first medium inlet chamber 21, and under the guidance of the baffle 5, flows through the interior of the U-shaped heat exchange tube 8. After absorbing or releasing heat, it flows out from the first medium outlet chamber 22.

[0024] The second medium enters the cylinder 1 through the second medium inlet pipe 6. Under the action of the anti-impact plate 10, the impact force is dispersed, and the medium flows over the outer surface of the U-shaped heat exchange tube 8, exchanging heat with the first medium. Guided by the baffle plate 9, the second medium forms a continuous spiral flow channel, enhancing turbulence and improving heat exchange efficiency. The heat-exchanged second medium flows out from the second medium outlet pipe 7.

[0025] In summary, this application has a simple structure, improves heat exchange efficiency, equipment stability and service life, and has broad application prospects.

[0026] It should be noted that the accompanying drawings merely illustrate the technical concept of the present invention and should not be used to limit the scope of protection of the present invention. For those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and all such improvements and modifications fall within the scope of protection of the claims of the present invention.

Claims

1. A shell and tube water-to-water heat exchanger, characterized by: The device includes a cylindrical body (1) and a cylindrical section (2). A tube sheet (3) is provided between the cylindrical body (1) and the cylindrical section (2) and they are connected by flanges (4) and bolts for sealing. A partition (5) is provided inside the cylindrical section (2) to divide the cylindrical section (2) into a first medium inlet chamber (21) and a first medium outlet chamber (22). A second medium inlet pipe (6) and a second medium outlet pipe (7) are provided on the cylindrical body (1). An anti-impact plate (10) is welded to the inner wall of the cylindrical body below the second medium inlet pipe (6). Multiple U-shaped heat exchange tubes (8) are provided inside the cylindrical body (1). The two ends of the U-shaped heat exchange tube (8) pass through the tube holes (31) on the tube sheet (3) corresponding to the first medium inlet chamber (21) and the first medium outlet chamber (22) respectively, and are sealed and fixed. At least five baffles (9) are arranged equidistantly along the axial direction of the cylinder (1) inside the cylinder (1), and adjacent baffles (9) are staggered in the circumferential direction. The baffles (9) are provided with tube holes corresponding to the U-shaped heat exchange tube (8). The U-shaped heat exchange tube (8) passes through the tube hole and is sealed and fitted with the tube hole. The outer edge of the baffle (9) is welded and fixed to the inner wall of the cylinder (1).

2. A shell and tube water-to-water heat exchanger according to claim 1, characterised in that: The impact protection plate (10) is a downwardly curved titanium alloy arc plate with an array of through holes.

3. A shell and tube water-to-water heat exchanger according to claim 1, wherein: A sealing gasket (12) is provided between the tube sheet (3) and the flange (4).

4. A shell and tube water-to-water heat exchanger according to claim 1, wherein: The U-shaped heat exchange tube (8) is a titanium alloy tube with spiral micro-ribs on its surface.

5. A shell and tube water-to-water heat exchanger according to claim 1, wherein: Each baffle (9) has a central angle of 90° and is staggered circumferentially by 15°–30° to form a continuous spiral flow channel.

6. A shell and tube water-to-water heat exchanger according to claim 1, wherein: The baffle plate (9), tube sheet (3) and U-shaped heat exchange tube (8) are sealed with sealant or by expansion joint to prevent fluid leakage.

7. A shell and tube water-to-water heat exchanger according to claim 1, wherein: Two saddles (11) are provided below the cylinder (1).

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