Multi-sleeve heat exchange equipment

Abstract

The utility model discloses multi-sleeve heat exchange equipment, which belongs to the field of heat exchange equipment and comprises an inner pipe, an inner side middle pipe, an outer side middle pipe and an outer pipe which are sequentially arranged from inside to outside, the space between the inner pipe and the inner side middle pipe is used as an inner side fluid channel, and the space between the inner side middle pipe and the outer side middle pipe is used as a middle fluid channel. The space between the outer middle pipe and the outer pipe serves as an outer fluid channel, and the two ends of the inner fluid channel, the two ends of the middle fluid channel and the two ends of the outer fluid channel are all sealed. An inner side fluid inlet pipe and an inner side fluid outlet pipe are arranged on the inner side middle pipe, a middle fluid inlet pipe and a middle fluid outlet pipe are arranged on the outer side middle pipe, and an outer side fluid inlet pipe and an outer side fluid outlet pipe are arranged on the outer pipe. According to the multi-sleeve heat exchange equipment, the heat exchange area is increased, and the heat exchange efficiency is improved. Meanwhile, flowing dead angles are reduced, dirt is reduced, the cleaning frequency is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of heat exchange equipment, in particular to multi-tube heat exchange equipment. Background Art

[0002] Heat exchange equipment (heat exchangers) plays an important role in chemical, petroleum, power, food and many other industrial productions.

[0003] The common structures of existing heat exchange equipment are shell and tube type and tube-in-tube type. Figure 1 As shown, it includes an inner tube and an outer tube, which has the advantages of simple structure and convenient processing, but it also has the problems of small heat exchange area, low heat exchange efficiency and large floor space. Figure 2 As shown, it includes a tube sheet 14, a shell 15, a baffle 16, a heat transfer tube bundle 17, etc. During operation, one fluid flows outside the heat transfer tube bundle, and another fluid flows inside the heat transfer tube bundle. The heat exchange process is to transfer heat through the side wall of the heat transfer tube bundle. In this process, the cold and hot fluids are basically cross-flowing. Due to the structure of the shell-and-tube heat exchanger, the flow rate of the fluid in the heat exchanger is relatively low, which makes the heat exchange efficiency also relatively low. At the same time, when the fluid flows in the shell, a dead angle will be generated at the connection between the baffle and the shell; when the fluid flows in the heat transfer tube bundle, a dead angle will also be generated at the contact between the tube sheet and the shell. Since the dead angle is easy to scale, it needs to be cleaned frequently, which further affects its working efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a multi-tube heat exchange equipment to address the above problems, which can increase the heat exchange area and improve the heat exchange efficiency; at the same time, reduce flow dead corners and reduce the dirt generated when the heat exchange equipment is working, thereby reducing the cleaning frequency and improving work efficiency.

[0005] To achieve the above objectives, the technical solution adopted in the present application is a multi-tube heat exchange equipment, which includes an inner tube, an inner middle tube, an outer middle tube and an outer tube arranged in sequence from the inside to the outside, the space between the inner tube and the inner middle tube is used as an inner fluid channel, the space between the inner middle tube and the outer middle tube is used as an intermediate fluid channel, the space between the outer middle tube and the outer tube is used as an outer fluid channel, and both ends of the inner fluid channel, the intermediate fluid channel and the outer fluid channel are sealed; the inner middle tube is provided with an inner fluid inlet pipe and an inner fluid outlet pipe, the outer middle tube is provided with an intermediate fluid inlet pipe and an intermediate fluid outlet pipe, and the outer tube is provided with an outer fluid inlet pipe and an outer fluid outlet pipe.

[0006] Furthermore, the inner fluid inlet pipe and the inner fluid outlet pipe are respectively arranged on both axial sides of the inner middle pipe, the middle fluid inlet pipe and the middle fluid outlet pipe are respectively arranged on both axial sides of the outer middle pipe, and the outer fluid inlet pipe and the outer fluid outlet pipe are respectively arranged on both axial sides of the outer pipe, so as to extend the flow time of the fluid in the channel.

[0007] Furthermore, the inner fluid inlet pipe and the outer fluid inlet pipe are arranged on the same side, and the inner fluid inlet pipe and the middle fluid inlet pipe are arranged on opposite sides, so that the fluids in the inner and outer fluid channels flow countercurrently with the fluid in the middle fluid channel, thereby generating a maximum temperature difference between the cold and hot fluids, enhancing the heat exchange performance, and ensuring sufficient heat exchange of the fluid in the heat exchange equipment.

[0008] Furthermore, the inner fluid inlet pipe and the inner fluid outlet pipe are arranged on both sides of the inner intermediate pipe in a radial direction, the middle fluid inlet pipe and the middle fluid outlet pipe are arranged on both sides of the outer intermediate pipe in a radial direction, and the outer fluid inlet pipe and the outer fluid outlet pipe are arranged on both sides of the outer pipe in a radial direction to ensure sufficient heat exchange of the fluid in the heat exchange equipment.

[0009] Furthermore, the inner tube, the inner intermediate tube, the outer intermediate tube and the outer tube are coaxially arranged to reduce the generation of scaling, while reducing the impact on the fluid flow rate and improving the heat exchange efficiency.

[0010] The beneficial effects of the present application are as follows: the inner and outer sides of the middle fluid channel are respectively divided into an inner fluid channel and an outer fluid channel, so that the fluid on both sides of the middle fluid channel exchanges heat with other fluids, increasing the heat exchange area and improving the heat exchange efficiency; at the same time, there are no structures such as baffles in the channel, thereby reducing dead corners and further reducing the dirt generated when the heat exchange equipment is working, thereby reducing the cleaning frequency and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of an existing shell and tube heat exchanger.

[0012] Figure 2 It is a schematic diagram of the structure of an existing shell and tube heat exchanger.

[0013] Figure 3 It is a schematic diagram of the structure of the utility model.

[0014] The text markings in the figure are as follows: 1. inner tube; 2. inner middle tube; 3. outer middle tube; 4. outer tube; 5. inner fluid channel; 6. middle fluid channel; 7. outer fluid channel; 8. inner fluid inlet tube; 9. inner fluid outlet tube; 10. middle fluid inlet tube; 11. middle fluid outlet tube; 12. outer fluid inlet tube; 13. outer fluid outlet tube; 14. tube sheet; 15. shell; 16. baffle; 17. heat transfer tube bundle. DETAILED DESCRIPTION

[0015] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the utility model.

[0016] Embodiment 1, as Figure 1-3 As shown, the structure of this embodiment is: a multi-tube heat exchange equipment, which includes an inner tube 1, an inner middle tube 2, an outer middle tube 3 and an outer tube 4 arranged in sequence from the inside to the outside. In order to simplify the structure, the lengths of the inner tube 1, the inner middle tube 2, the outer middle tube 3 and the outer tube 4 are also shortened in sequence from the inside to the outside, that is, both ends of the inner tube 1 extend out of the inner middle tube 2, both ends of the inner middle tube 2 extend out of the outer middle tube 3, and both ends of the outer middle tube 3 extend out of the outer tube 4, so as to facilitate the arrangement of the fluid inlet and outlet pipes, and also to avoid the fluid inlet and outlet pipes from interfering with the flow of the fluid. The inner tube 1, the inner middle tube 2, the outer middle tube 3 and the outer tube 4 are coaxially arranged, and the heat exchange equipment composed of these pipes can be a straight tube shape, a U-shape, a ring shape, a spiral shape, etc.

[0017] The space between the inner tube 1 and the inner middle tube 2 is used as the inner fluid channel 5, the space between the inner middle tube 2 and the outer middle tube 3 is used as the middle fluid channel 6, and the space between the outer middle tube 3 and the outer tube 4 is used as the outer fluid channel 7. Both ends of the inner fluid channel 5, the middle fluid channel 6 and the outer fluid channel 7 are sealed. To achieve sealing, a sealing head connected to the inner tubes can be provided on the inner walls of the inner middle tube 2, the outer middle tube 3 and the outer tube 4; the inner middle tube 2 is provided with an inner fluid inlet tube 8 and an inner fluid outlet tube 9, the outer middle tube 3 is provided with an middle fluid inlet tube 10 and an middle fluid outlet tube 11, and the outer tube 4 is provided with an outer fluid inlet tube 12 and an outer fluid outlet tube 13.

[0018] The inner fluid inlet pipe 8 and the inner fluid outlet pipe 9 are respectively arranged on both axial sides of the inner intermediate pipe 2, the intermediate fluid inlet pipe 10 and the intermediate fluid outlet pipe 11 are respectively arranged on both axial sides of the outer intermediate pipe 3, and the outer fluid inlet pipe 12 and the outer fluid outlet pipe 13 are respectively arranged on both axial sides of the outer pipe 4. The inner fluid inlet pipe 8 and the outer fluid inlet pipe 12 are arranged on the same side, and the inner fluid inlet pipe 8 and the intermediate fluid inlet pipe 10 are arranged on opposite sides.

[0019] The inner fluid inlet pipe 8 and the inner fluid outlet pipe 9 are respectively arranged on the radial sides of the inner intermediate pipe 2, the intermediate fluid inlet pipe 10 and the intermediate fluid outlet pipe 11 are respectively arranged on the radial sides of the outer intermediate pipe 3, and the outer fluid inlet pipe 12 and the outer fluid outlet pipe 13 are respectively arranged on the radial sides of the outer pipe 4.

[0020] Specific working process: cold fluid is introduced into the inner fluid channel 5 and the outer fluid channel 7, and hot fluid is introduced into the middle fluid channel 6. Figure 3 As shown by the arrows in , the cold fluid is divided into two paths, one path flows into the inner fluid channel 5 from the inner fluid inlet pipe 8, and then flows out from the inner fluid outlet pipe 9, and the other path flows into the outer fluid channel 7 from the outer fluid inlet pipe 12, and then flows out from the outer fluid outlet pipe 13, and the hot fluid flows into the middle fluid channel 6 from the middle fluid inlet pipe 10, and then flows out from the middle fluid outlet pipe 11. Compared with the single-sided heat exchange method of the shell-and-tube heat exchanger, in this embodiment, there are cold fluids on both sides of the hot fluid in the middle fluid channel 6, thereby realizing double-sided exchange, thus increasing the heat exchange area and improving the heat exchange efficiency without increasing the equipment area. At the same time, both the cold and hot fluids flow in smaller channels, the liquid layer is thinner, the heat conduction resistance of the fluid itself is very small, and the heat exchange efficiency is high. At the same time, when the fluid flows in the flow channel, there is no other structure to block it. Compared with the shell-and-tube heat exchanger, the structure of the present application can reduce the loss of fluid flow rate during the heat exchange process, thereby improving the heat exchange efficiency and reducing the generation of scaling.

[0021] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0022] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. The above is only the preferred implementation method of the utility model. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principle of the utility model, they can make several improvements, embellishments or changes, and can also combine the above technical features in an appropriate manner; these improvements, embellishments, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection scope of the utility model.

Claims

1. A multi-tube heat exchange equipment, characterized in that: It comprises an inner tube (1), an inner middle tube (2), an outer middle tube (3) and an outer tube (4) which are arranged in sequence from the inside to the outside. The space between the inner tube (1) and the inner middle tube (2) serves as an inner fluid channel (5), the space between the inner middle tube (2) and the outer middle tube (3) serves as an intermediate fluid channel (6), and the space between the outer middle tube (3) and the outer tube (4) serves as an outer fluid channel (7). Both ends of the inner fluid channel (5), the intermediate fluid channel (6) and the outer fluid channel (7) are sealed. The inner middle tube (2) is provided with an inner fluid inlet tube (8) and an inner fluid outlet tube (9), the outer middle tube (3) is provided with an intermediate fluid inlet tube (10) and an intermediate fluid outlet tube (11), and the outer tube (4) is provided with an outer fluid inlet tube (12) and an outer fluid outlet tube (13).

2. The multi-tube heat exchange equipment according to claim 1, characterized in that: The inner fluid inlet pipe (8) and the inner fluid outlet pipe (9) are arranged on both axial sides of the inner intermediate pipe (2), the intermediate fluid inlet pipe (10) and the intermediate fluid outlet pipe (11) are arranged on both axial sides of the outer intermediate pipe (3), and the outer fluid inlet pipe (12) and the outer fluid outlet pipe (13) are arranged on both axial sides of the outer pipe (4).

3. The multi-tube heat exchange equipment according to claim 2, characterized in that: The inner fluid inlet pipe (8) and the outer fluid inlet pipe (12) are arranged on the same side, and the inner fluid inlet pipe (8) and the middle fluid inlet pipe (10) are arranged on opposite sides.

4. The multi-tube heat exchange equipment according to claim 2, characterized in that: The inner fluid inlet pipe (8) and the inner fluid outlet pipe (9) are arranged on both radial sides of the inner intermediate pipe (2), the intermediate fluid inlet pipe (10) and the intermediate fluid outlet pipe (11) are arranged on both radial sides of the outer intermediate pipe (3), and the outer fluid inlet pipe (12) and the outer fluid outlet pipe (13) are arranged on both radial sides of the outer pipe (4).

5. The multi-tube heat exchange equipment according to claim 1, characterized in that: The inner tube (1), the inner intermediate tube (2), the outer intermediate tube (3) and the outer tube (4) are coaxially arranged.

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