A shell-and-tube heat exchanger

Abstract

The utility model discloses a shell and tube heat exchanger, including the pipe body, the inside fixed mounting of pipe body has the tube sheet, the inside of tube sheet is provided with a plurality of tube mounting hole, the inside of every tube mounting hole is fixedly installed with the tube bundle, the inside of tube bundle is provided with the inner spiral mechanism, and the inner spiral mechanism includes the spiral thread that sets up in the tube bundle inner wall, the inside of pipe body is provided with the inner spiral mechanism, and the inner spiral mechanism includes the spiral baffle that sets up in the pipe body inside, can control fluid through the inner spiral mechanism, make the spiral flow when cold water fluid moves in the tube bundle, increase the turbulence degree of cold water fluid, and the turbulence effect of spiral thread can inhibit the stagnation of water flow, reduce the risk of mineral deposition and microbial attachment, thereby reduce the probability of scale condensation, and the outer spiral mechanism can change hot water into spiral flow, not only can guarantee the heat exchange efficiency, but also can wash the inner wall of tube bundle through spiral water flow, and the condensed scale is washed away, and the frequency of maintenance is reduced.

Description

Technical Field

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

[0002] Shell-and-tube heat exchangers are a type of indirect heat exchange equipment widely used in industrial fields. Their core function is to achieve heat exchange between two fluids through the tube wall while maintaining physical isolation between the fluids, and to achieve efficient heat transfer through the metal tube wall.

[0003] However, most traditional tubular heat exchangers currently use a smooth straight tube structure, which makes it easy for scale to form on the inner wall of the tube bundle. The condensed scale not only increases the thickness of the tube wall and affects the heat exchange efficiency, but also causes blockage, affecting the flow efficiency of water and seriously affecting the operation of the heat exchanger. Utility Model Content

[0004] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of this section, the abstract, and the title, and such simplifications or omissions should not be used to limit the scope of this utility model.

[0005] In view of the above-mentioned problems and those existing in shell-and-tube heat exchangers, this utility model is proposed.

[0006] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution: A shell-and-tube heat exchanger includes a tube body, a tube sheet fixedly installed inside the tube body, a plurality of tube mounting holes provided inside the tube sheet, a tube bundle fixedly installed inside each tube mounting hole, an inner spiral mechanism provided inside the tube bundle, the inner spiral mechanism including spiral patterns provided on the inner wall of the tube bundle, and an outer spiral mechanism provided inside the tube body, the outer spiral mechanism including a spiral baffle provided inside the tube body.

[0007] As a preferred embodiment of the shell-and-tube heat exchanger described in this utility model, the tube sheet is provided with a sealing head at the position of the tube mounting hole, and the sealing head is wrapped around the tube bundle installed inside the tube mounting hole.

[0008] As a preferred embodiment of the shell-and-tube heat exchanger described in this utility model, the spiral baffle is provided with a plurality of bundle tube holes inside, and the number of bundle tube holes is the same as the number of tube mounting holes inside the tube sheet and their positions are aligned.

[0009] As a preferred embodiment of the shell-and-tube heat exchanger described in this utility model, a hot water inlet is provided at the bottom end of one end of the tube, and a hot water outlet is provided at the top end of the tube opposite to the other end.

[0010] As a preferred embodiment of the shell-and-tube heat exchanger described in this utility model, a head is fixedly installed at the end of the tube body that is the same as the hot water outlet, and a connecting flange is provided at the connection end between the head and the tube body.

[0011] In a preferred embodiment of the shell-and-tube heat exchanger described in this utility model, the tube body and the end cap are fixedly installed via the connecting flange, and the tube sheet is fixedly installed between the tube body and the end cap via the connecting flange.

[0012] As a preferred embodiment of the shell-and-tube heat exchanger described in this utility model, a cold water inlet is provided at the top of the end cap, and a cold water outlet is provided at the bottom of the end cap.

[0013] In a preferred embodiment of the shell-and-tube heat exchanger described in this utility model, an anti-impact plate is fixedly connected to the inner wall of the end cap, and the end of the anti-impact plate away from the inner wall of the end cap is close to the tube sheet. Compared with the prior art, the beneficial effects of this utility model are: The internal spiral mechanism controls the fluid flow, creating a spiral flow as the cold water moves through the tube bundle. This increases the turbulence of the cold water, and the spiral effect inhibits stagnation, reducing the risk of mineral deposition and microbial adhesion, thus lowering the probability of scale formation. Meanwhile, the external spiral mechanism converts hot water into a spiral flow, ensuring heat exchange efficiency and flushing the inner wall of the tube bundle with the spiral water flow to remove scale buildup, reducing maintenance frequency and facilitating cleaning. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. 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. Among them: Figure 1 This is a schematic diagram of the overall structure of a shell-and-tube heat exchanger according to the present invention. Figure 2 This is a schematic diagram of the internal structure of a shell-and-tube heat exchanger according to the present invention. Figure 3 This is a schematic diagram of the external spiral mechanism in a shell-and-tube heat exchanger according to the present invention. Figure 4This is a schematic diagram of the tube sheet structure in a shell-and-tube heat exchanger according to the present invention. Figure 5 This is a schematic diagram of the internal spiral mechanism in a shell-and-tube heat exchanger according to the present invention.

[0015] In the diagram: 1. Pipe body; 2. Hot water inlet; 3. Hot water outlet; 4. End cap; 5. Cold water inlet; 6. Cold water outlet; 7. Connecting flange; 8. Tube sheet; 9. Anti-impact plate; 10. Pipe mounting hole; 11. Sealing head; 12. Tube bundle; 13. Spiral pattern; 14. Spiral baffle; 15. Tube bundle hole. Detailed Implementation

[0016] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0017] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Example

[0019] Please see Figure 1 - Figure 5 This utility model provides a technical solution: A shell-and-tube heat exchanger includes a tube body 1, a tube sheet 8 fixedly installed inside the tube body 1, and multiple tube mounting holes 10 inside the tube sheet 8. A tube bundle 12 is fixedly installed inside each tube mounting hole 10. An inner spiral mechanism is provided inside the tube bundle 12, which includes spiral patterns 13 on the inner wall of the tube bundle 12. An outer spiral mechanism is provided inside the tube body 1, which includes a spiral baffle 14 inside the tube body 1. The inner spiral mechanism can control the fluid, so that the cold water fluid forms a spiral flow when moving in the tube bundle 12, increasing the turbulence of the cold water fluid. The turbulence effect of the spiral pattern can suppress water flow stagnation, reduce the risk of mineral deposition and microbial adhesion, thereby reducing the probability of scale formation. This ensures heat exchange efficiency and also flushes the inner wall of the tube bundle 12 with spiral water flow to remove condensed scale, reducing maintenance frequency and facilitating cleaning.

[0020] A sealing head 11 is provided at the position of the tube mounting hole 10 in the tube sheet 8. The sealing head 11 is wrapped around the tube bundle 12 installed inside the tube mounting hole 10. The sealing head 11 can wrap around the tube bundle 12 to prevent the fluid in the tube body 1 from communicating with the sealing head 4 and causing leakage, thus ensuring the sealing performance of the heat exchanger and improving the reliability of the heat exchange process.

[0021] The spiral baffle 14 has multiple bundle tube holes 15 inside. The number of bundle tube holes 15 is the same as the number of tube mounting holes 10 inside the tube sheet 8 and their positions are relatively aligned. The external spiral mechanism improves the traditional baffle, so that the hot water fluid flows in a spiral, reducing the heat transfer dead zone and thus improving the heat exchange efficiency. At the same time, it can also flush the inner wall of the tube body 1 to prevent scale from forming.

[0022] When in use, hot water fluid must first be introduced into the pipe body 1 from hot water inlet 2. Due to the action of the spiral baffle 14, the hot water fluid will flow in a spiral pattern inside the pipe body 1 after entering. At the same time, cold water fluid is introduced into the interior of the end cap 4 from the cold water inlet 5, and then enters the interior of the tube bundle 12 through the tube mounting hole 10 for flow. The spiral pattern 13 on the inner wall of the tube bundle 12 also causes the cold water fluid to flow in a spiral. The hot water fluid and the cold water fluid exchange heat inside the pipe body 1 through the pipe wall of the tube bundle 12. The exchanged hot water fluid and cold water fluid flow out from the hot water outlet 3 and the cold water outlet 6 respectively, thus realizing the heat exchange. Example

[0023] Please see Figure 1 - Figure 5 This utility model provides a technical solution: A hot water inlet 2 is provided at the bottom of one end of the pipe body 1, and a hot water outlet 3 is provided at the top of the opposite end of the pipe body 1. The hot water inlet 2 is used to introduce hot water fluid into the pipe body 1 to provide fluid for heat exchange, and the hot water outlet 3 is used to discharge the hot water whose temperature has dropped after heat exchange, thus completing the circulation of hot water.

[0024] A head 4 is fixedly installed at the same end as the hot water outlet 3 on the tube body 1. A connecting flange 7 is provided at the connection end of the head 4 and the tube body 1. The connecting flange 7 is used to connect the tube body 1 and the head 4, making the connection between the tube body 1 and the head 4 more secure and sealed, and facilitating the installation, disassembly and maintenance of the heat exchanger.

[0025] The tube body 1 and the end cap 4 are fixedly installed through the connecting flange 7. The tube sheet 8 is fixedly installed between the tube body 1 and the end cap 4 through the connecting flange 7. The connecting flange 7 fixes the tube body 1, the end cap 4 and the tube sheet 8 together, ensuring the stability and sealing of the connection between the components, making the heat exchanger a whole and able to perform heat exchange work stably.

[0026] The top of the end cap 4 is provided with a cold water inlet 5 and the bottom of the end cap 4 is provided with a cold water outlet 6. The cold water inlet 5 can introduce cold water fluid into the end cap 4 to exchange heat with the hot water in the pipe body 1 and complete the heat exchange work. The cold water outlet 6 is used to discharge the cold water whose temperature has risen after heat exchange and complete the circulation of cold water.

[0027] An anti-impact plate 9 is fixedly connected to the inner wall of the head 4. The end of the anti-impact plate 9 away from the inner wall of the head 4 is close to the tube sheet 8. The anti-impact plate 9 can buffer when cold water enters, prevent cold water from impacting the tube bundle 12, avoid the tube bundle 12 being not installed stably and firmly, protect the internal components of the heat exchanger, and extend its service life.

[0028] Unlike Embodiment 1, the components are connected by the connecting flange 7 to form a whole, which facilitates heat exchange, as well as the installation, disassembly and maintenance of the heat exchanger. At the same time, the interaction between the components not only protects the heat exchanger and extends its service life, but also enables the circulation of hot and cold water to achieve heat exchange.

[0029] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A shell-and-tube heat exchanger, comprising a tube body (1), characterized in that, A tube sheet (8) is fixedly installed inside the tube body (1). The tube sheet (8) has multiple tube mounting holes (10) inside. A tube bundle (12) is fixedly installed inside each tube mounting hole (10). An inner spiral mechanism is provided inside the tube bundle (12). The inner spiral mechanism includes spiral patterns (13) provided on the inner wall of the tube bundle (12). An outer spiral mechanism is provided inside the tube body (1). The outer spiral mechanism includes a spiral baffle (14) provided inside the tube body (1).

2. A shell-and-tube heat exchanger according to claim 1, characterized in that, The tube sheet (8) is provided with a sealing head (11) at the position of the tube mounting hole (10), and the sealing head (11) is wrapped around the tube bundle (12) installed inside the tube mounting hole (10).

3. A shell-and-tube heat exchanger according to claim 2, characterized in that, The spiral baffle (14) has multiple tube bundle holes (15) inside, and the number of tube bundle holes (15) is the same as the number of tube mounting holes (10) inside the tube sheet (8) and their positions are relatively aligned.

4. A shell-and-tube heat exchanger according to claim 1, characterized in that, A hot water inlet (2) is provided at the bottom end of one end of the pipe body (1), and a hot water outlet (3) is provided at the top end of the opposite end of the pipe body (1).

5. A shell-and-tube heat exchanger according to claim 4, characterized in that, A cap (4) is fixedly installed at the same end as the hot water outlet (3) of the pipe body (1), and a connecting flange (7) is provided at the connection end of the cap (4) and the pipe body (1).

6. A shell-and-tube heat exchanger according to claim 5, characterized in that, The pipe body (1) and the end cap (4) are fixedly installed through the connecting flange (7), and the tube sheet (8) is fixedly installed between the pipe body (1) and the end cap (4) through the connecting flange (7).

7. A shell-and-tube heat exchanger according to claim 5, characterized in that, The top end of the end cap (4) is provided with a cold water inlet (5), and the bottom end of the end cap (4) is provided with a cold water outlet (6).

8. A shell-and-tube heat exchanger according to claim 5, characterized in that, An anti-impact plate (9) is fixedly connected to the inner wall of the end cap (4), and the end of the anti-impact plate (9) away from the inner wall of the end cap (4) is close to the tube sheet (8).

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