High-pressure-resistant shell-and-tube energy-saving heat exchange unit

Abstract

The invention belongs to the technical field of heat exchange equipment, and relates to a high-pressure-resistant shell-and-tube energy-saving heat exchange unit which comprises a shell (1) and a tube plate (2) matched with the shell (1), a plurality of heat exchange tubes (3) are installed on the tube plate (2) and located in the shell (1), a tube box (4) is arranged on the outer side of the tube plate (2), the tube box (4) is detachably and fixedly connected with the tube plate (2) and the shell (1), and the shell (1) is fixedly connected with the tube plate (2). A baffle plate (5) is arranged on the heat exchange tube (3), and the heat exchanger further comprises a supporting driving device (6) which is used for driving the baffle plate (5) to abut against the inner wall of the shell (1). The high-pressure-resistant shell-and-tube type energy-saving heat exchange unit is high in heat exchange efficiency, good in structural strength and convenient to disassemble and maintain.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy-saving heat exchange equipment, and relates to a high-pressure-resistant shell-and-tube energy-saving heat exchange unit. Background Art

[0002] The core structure of a shell-and-tube heat exchange unit is a shell-and-tube heat exchanger. A shell-and-tube heat exchanger generally includes a shell and a heat exchange tube group installed in the shell, and heat exchange is achieved through the transportation of tube-side fluid and shell-side fluid.

[0003] Currently, in order to improve the heat exchange efficiency, baffle plates are also provided inside the shell to make the shell fluid move along a specified path to achieve shell-side turbulence and improve the heat exchange efficiency. In the prior art, the installation of baffle plates can generally be divided into two forms. One is that there is a gap between the baffle plate and the inner wall of the shell. In this way, the defect is that part of the shell-side fluid will move through the gap between the baffle plate and the inner wall of the shell and does not move along the predetermined path between the baffle plates, thus reducing the heat exchange efficiency and causing energy waste. The other way is that the baffle plate is fixedly connected to the inner wall of the shell, which can avoid the above problems. However, this method is not convenient for the disassembly and maintenance of the heat exchange tubes and is prone to the problem of shell-side dead flow. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems and provide a high-pressure-resistant shell-and-tube energy-saving heat exchange unit.

[0005] To achieve the above purpose, the present invention provides a high-pressure-resistant shell-and-tube energy-saving heat exchange unit, including a shell and a tube sheet matched with the shell. A plurality of heat exchange tubes are installed on the tube sheet. The heat exchange tubes are located inside the shell. A tube box is provided outside the tube sheet. The tube box is detachably and fixedly connected to the tube sheet and the shell. Baffle plates are provided on the heat exchange tubes. The support driving device is further included, and the support driving device is used to drive the baffle plates to tightly abut against the inner wall of the shell.

[0006] Further, the heat exchange tubes are U-shaped tubes, including lower-side tubes, bent tubes, and upper-side tubes. The baffle plates are alternately arranged on the upper-side tubes and the lower-side tubes.

[0007] Further, one side of the baffle plate abutting against the inner wall of the shell has an elastic material layer.

[0008] Further, wedge-shaped holes are provided on the baffle plates. The support driving device includes a power rod, and wedge-shaped blocks are provided on the power rod and are matched with the wedge-shaped holes.

[0009] Further, an installation groove is provided in the middle of the tube sheet. The installation groove has a through hole. A spring is provided in the installation groove. The power rod passes through the spring and the through hole in sequence;

[0010] One end of the power rod is located inside the tube box. A limiting plate is provided at the end of the power rod inside the tube box, and the limiting plate is slidably engaged with the installation groove.

[0011] Further, a partition plate is provided in the middle of the tube box to divide the tube box into an upper cavity and a lower cavity. The lower side tube is communicated with the lower cavity, and the upper side tube is communicated with the upper cavity;

[0012] The partition plate squeezes the power rod to move in the axial direction of the housing.

[0013] Further, through holes are also provided on the baffle plate for the heat exchange tubes to pass through. Elastic rings are provided in the through holes, and air holes are provided in the elastic rings.

[0014] Further, a feed inlet and a discharge outlet are provided on the tube box. The feed inlet is communicated with the lower cavity, and the discharge outlet is communicated with the upper cavity;

[0015] A second feed inlet and a second discharge outlet are provided on the housing.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. For the high-pressure-resistant shell-and-tube energy-saving heat exchange unit of the present invention, through the above settings of the support driving device and the baffle plate, the overall structural strength of the present invention can be dynamically increased, and at the same time, the problem of bypass flow of the shell-side fluid can be reduced, which is beneficial to improving the heat exchange efficiency, avoiding energy waste, and meeting the energy-saving requirements.

[0018] 2. For the high-pressure-resistant shell-and-tube energy-saving heat exchange unit of the present invention, the baffle plate moves dynamically through the above structure. When disassembly and maintenance are required, the baffle plate resets, and there is a gap between the baffle plate and the inner wall of the housing. On the one hand, it is convenient to disassemble the heat exchange tubes and the baffle plate. On the other hand, it can effectively reduce and avoid the problem of damage caused by collision with the housing.

[0019] 3. For the high-pressure-resistant shell-and-tube energy-saving heat exchange unit of the present invention, through the settings of the elastic ring and the air holes, in cooperation with the above settings of the baffle plate, on the one hand, it can provide a thermal expansion space for the heat exchange tubes while ensuring the structural stability, and is beneficial to avoiding the problem of dead flow of the shell-side fluid while improving the heat exchange efficiency. Description of the Drawings

[0020] Figure 1 Schematically showing a perspective view of a high-pressure-resistant shell-and-tube energy-saving heat exchange unit according to an embodiment of the present invention;

[0021] Figure 2 Schematically showing a front view of a high-pressure-resistant shell-and-tube energy-saving heat exchange unit according to an embodiment of the present invention;

[0022] Figure 3 Schematic cross-sectional view showing a high-pressure resistant shell-and-tube energy-saving heat exchange unit according to an embodiment of the present invention;

[0023] Figure 4 Schematically showing Figure 3 Enlarged view of part A in

[0024] Figure 5 Schematically showing Figure 3 Enlarged view of part B in

[0025] Figure 6 Schematic structural view of a heat exchange tube according to an embodiment of the present invention;

[0026] Figure 7 Schematic perspective view of a baffle according to an embodiment of the present invention;

[0027] Figure 8 Schematic front view of a baffle according to an embodiment of the present invention;

[0028] Figure 9 Schematically showing Figure 8 Enlarged view of part C in

[0029] The meanings represented by the reference numerals in the drawings are as follows:

[0030] 1, shell; 2, tube sheet; 3, heat exchange tube; 4, tube box; 5, baffle; 6, support driving device; 31, lower side tube; 32, elbow; 33, upper side tube; 51, wedge-shaped hole; 61, power rod; 62, wedge-shaped block; 21, installation groove; 22, through hole; 23, spring; 63, limiting plate; 41, dividing plate; 52, through hole; 53, elastic ring; 54, air hole; 42, feed inlet; 43, discharge outlet; 11, second feed inlet; 12, second discharge outlet. Detailed implementation manners

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0032] The present invention will be described in detail below with reference to the drawings and specific implementation manners. The implementation manners cannot be described in detail one by one here, but the implementation manners of the present invention are not limited to the following implementation manners.

[0033] Combined with Figures 1 - 9As shown in the figure, the present invention provides a high-pressure resistant shell-and-tube heat exchange unit, which includes a housing 1 and a tube sheet 2 that cooperates with the housing 1. A plurality of heat exchange tubes 3 are installed on the tube sheet 2. The heat exchange tubes 3 are located inside the housing 1. A tube box 4 is provided outside the tube sheet 2. The tube box 4 is detachably and fixedly connected to the tube sheet 2 and the housing 1.

[0034] In this embodiment, the heat exchange tube 3 is a U-shaped tube, which includes a lower side tube 31, a bent tube 32, and an upper side tube 33. Baffles 5 are alternately arranged on the upper side tube 33 and the lower side tube 31. It also includes a support driving device 6, and the support driving device 6 is used to drive the baffle 5 to tightly abut against the inner wall of the housing 1.

[0035] For the high-pressure resistant shell-and-tube energy-saving heat exchange unit of the present invention, through the above structural arrangement, after installation, the baffle 5 can be tightly abutted against the inner wall of the housing 1 by the support driving device 6, so as to increase the structural strength of the high-pressure resistant shell-and-tube energy-saving heat exchange unit of the present invention and improve the pressure resistance. Then, as the maintenance cycle (it is necessary to disassemble and clean regularly, etc., to ensure the heat exchange efficiency), the high-pressure resistant shell-and-tube energy-saving heat exchange unit of the present invention is disassembled, so that the driving effect of the support driving device 6 on the baffle 5 disappears, so that the baffle 5 is separated from the inner wall of the housing 1, thus facilitating the removal of the heat exchange tube 3 and the baffle 5 from the housing 1, and at the same time avoiding the problem that the baffle 5 collides or rubs against the inner wall of the housing 1, resulting in damage to the anti-corrosion layer.

[0036] The following will describe each component of the present invention in detail:

[0037] According to an embodiment of the present invention, the side of the baffle 5 that abuts against the inner wall of the housing has an elastic material layer. With such an arrangement, it is possible to avoid the bypass flow of the shell-side fluid and improve the heat exchange efficiency. At the same time, the elastic contact is beneficial to reducing the problem of heat expansion stress concentration caused during heat exchange.

[0038] According to an embodiment of the present invention, the baffle 5 is provided with a wedge-shaped hole 51, and the support driving device 6 includes a power rod 61. A wedge-shaped block 62 is provided on the power rod 61 and is matched with the wedge-shaped hole 51. Specifically, an installation groove 21 is provided in the middle of the tube sheet 2. The installation groove 21 has a through hole 22. A spring 23 is provided in the installation groove 21. The power rod 61 is sequentially arranged through the spring 23 and the through hole 22. One end of the power rod 61 is located inside the tube box 4. A limit plate 63 is provided at the end of the power rod 61 located inside the tube box 4. The limit plate 63 is slidably matched with the installation groove 21.

[0039] In the present invention, a partition plate 41 is provided in the middle of the tube box 4 to divide the tube box 4 into an upper cavity and a lower cavity. The lower side tube 31 communicates with the lower cavity, and the upper side tube 33 communicates with the upper cavity. The tube box 4 is provided with a feed port 42 and a discharge port 43. The feed port 42 communicates with the lower cavity, and the discharge port 43 communicates with the upper cavity; the housing 1 is provided with a second feed port 11 and a second discharge port 12.

[0040] For the high-pressure-resistant shell-and-tube energy-saving heat exchange unit of the present invention, the working principle is as follows: The first fluid enters the lower cavity of the tube sheet 4 from the feed port 42, enters the lower-side tubes 31, then passes through the elbow tubes 32 and the upper-side tubes 31 to enter the upper cavity of the tube sheet 4, and is discharged through the discharge port 43. At the same time, the second fluid enters the interior of the shell 1 from the second feed port 11 on the shell 1, exchanges heat with the first fluid in the heat exchange tubes 3, and then is discharged from the second discharge port.

[0041] When installing the high-pressure-resistant shell-and-tube energy-saving heat exchange unit of the present invention, the power rod 61 is extruded by the partition plate 41 to move in the axial direction of the shell 1. Thus, the wedge-shaped block 62 drives the baffle plate 5 to move radially outward along the shell 1 to abut against the inner wall of the shell 1. In addition, according to an embodiment of the present invention, the baffle plate 5 is further provided with a through hole 52 for the heat exchange tube 3 to pass through, and an elastic ring 53 is provided in the through hole 52, and air holes 54 are provided in the elastic ring 53. Through the setting of the elastic ring 53, on the one hand, it can provide a thermal expansion space for the heat exchange tube 3, and on the other hand, through the setting of the air holes 54, the dead flow phenomenon of the shell-side fluid can be effectively avoided.

[0042] The above description is only one embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-pressure shell and tube energy-saving heat exchange unit, comprising a shell (1) and a tube sheet (2) matched with the shell (1), a plurality of heat exchange tubes (3) being mounted on the tube sheet (2), the heat exchange tubes (3) being located in the shell (1), a tube box (4) being arranged outside the tube sheet (2), the tube box (4) being detachably fixedly connected to the tube sheet (2) and the shell (1), characterized in that: The heat exchange tube (3) is provided with a baffle (5) and also includes a support drive device (6), wherein the support drive device (6) is used to drive the baffle (5) to press against the inner wall of the shell (1).

2. The high-pressure shell and tube energy-saving heat exchange unit according to claim 1 is characterized in that: The heat exchange tube (3) is a U-shaped tube, comprising a lower tube (31), a bent tube (32) and an upper tube (33), and the baffles (5) are alternately arranged on the upper tube (33) and the lower tube (31).

3. The high-pressure resistant shell and tube energy-saving heat exchange unit according to claim 2, characterized in that: The baffle plate (5) has an elastic material layer on one side thereof abutting against the inner wall of the shell (1).

4. The high-pressure resistant shell and tube energy-saving heat exchange unit according to claim 3, characterized in that: The baffle plate (5) is provided with a wedge-shaped hole (51), and the support drive device (6) comprises a power rod (61). The power rod (61) is provided with a wedge-shaped block (62) that matches the wedge-shaped hole (51).

5. The high-pressure resistant shell and tube energy-saving heat exchange unit according to claim 4, characterized in that: A mounting groove (21) is provided in the middle of the tube plate (2), the mounting groove (21) has a through hole (22), a spring (23) is provided in the mounting groove (21), and the power rod (61) passes through the spring (23) and the through hole (22) in sequence; One end of the power rod (61) is located in the pipe box (4), and a limit plate (63) is provided at the end of the power rod (61) located in the pipe box (4), and the limit plate (63) is slidably matched with the installation groove (21).

6. The high-pressure resistant shell and tube energy-saving heat exchange unit according to claim 5, characterized in that: A partition plate (41) is provided in the middle of the pipe box (4) to divide the pipe box (4) into an upper cavity and a lower cavity, the lower tube (31) is connected to the lower cavity, and the upper tube (33) is connected to the upper cavity; The partition plate (41) squeezes the power rod (61) to move in the axial direction of the housing (1).

7. The high-pressure resistant shell and tube energy-saving heat exchange unit according to claim 5, characterized in that: The baffle plate (5) is also provided with a through hole (52) for the heat exchange tube (3) to pass through, an elastic ring (53) is provided in the through hole (52), and an air hole (54) is provided in the elastic ring (53).

8. The high-pressure resistant shell and tube energy-saving heat exchange unit according to claim 6, characterized in that: The pipe box (4) is provided with a feed port (42) and a discharge port (43), wherein the feed port (42) is communicated with the lower cavity, and the discharge port (43) is communicated with the upper cavity; The shell (1) is provided with a second material inlet (11) and a second material outlet (12).

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