A flow equalization device for a fluoroplastic heat exchanger tube box

Abstract

This application belongs to the field of heat exchanger technology, and particularly relates to a flow equalization device for a fluoroplastic heat exchanger tube box. The flow equalization device includes a partition plate, a flow equalization opening disposed on the partition plate for inserting and installing fluoroplastic heat exchanger tubes, a spiral strip disposed at one end on the partition plate for sleeved onto the fluoroplastic heat exchanger tubes, and a reinforcing rod disposed at one end on the partition plate for connecting the outer edge of the spiral strip. The beneficial effects of this application include at least the following: without affecting the flow equalization effect on the shell-side fluid, the device also provides additional spiral flow functionality on the surface of the fluoroplastic heat exchanger tubes, compensating for the lack of spiral flow functionality at both ends of the fluoroplastic heat exchanger tubes in the prior art, thereby increasing the effective area of ​​the spiral flow and improving heat exchange efficiency.

Description

Technical Field

[0001] This application belongs to the field of heat exchanger technology, and in particular relates to a flow equalization device for a fluoroplastic heat exchanger tube box. Background Technology

[0002] Fluoroplastic heat exchangers refer to heat exchangers whose main body material is fluoroplastic. The advantages of fluoroplastics are mainly: excellent resistance to chemical corrosion, a relatively wide effective operating temperature range, and a smooth surface that does not easily attract substances.

[0003] Generally, common fluoroplastic heat exchangers are shell-and-tube type, consisting mainly of a series of parallel fluoroplastic tubes and an outer shell for mounting and fixing these tubes. One fluid flows inside the fluoroplastic tubes, while another fluid flows outside the tubes and inside the outer shell. A significant temperature difference between these two fluids allows for heat exchange.

[0004] On the other hand, the main function of the flow equalization device used in the aforementioned tube box is to evenly distribute the second type of fluid, ensuring that it fully contacts all of the aforementioned fluoroplastic tubes. Otherwise, the fluoroplastic tubes on the side away from the outer casing inlet pipe will not achieve sufficient heat exchange, and the second type of fluid will only flow near the fluoroplastic tubes on the side closer to the outer casing inlet pipe, which will greatly reduce the heat exchange efficiency.

[0005] Correspondingly, the secondary function of the aforementioned flow equalization device is to install and reinforce the fluoroplastic tubing, which is the meaning of the word "tubing" in its name, while the word "box" refers to the aforementioned outer casing.

[0006] For example, Chinese utility model patent with authorization announcement number CN204461147U and authorization announcement date of 2015.07.08 discloses a shell-side flow equalization spiral-supported longitudinal flow heat exchanger, whose main structural components include: shell, self-supporting heat exchange tubes, flow equalization plate, spacer rod, tube sheet, tube box, shell-side inlet tube, shell-side outlet tube, tube-side inlet tube, tube-side outlet tube, smooth tube, and spiral support bar.

[0007] The longitudinal flow heat exchanger in this utility model patent has the following advantages: the spiral support bar enables the shell-side fluid to flow spirally along the surface of each heat exchange tube, which enhances the turbulence of the fluid around the tube wall and effectively strengthens the convective heat transfer of the shell-side fluid.

[0008] However, in actual use, this longitudinal flow heat exchanger still has at least the following problems with relatively low heat exchange efficiency: the spiral support bar is only set in the middle position on its smooth tube, which makes the effective area of ​​spiral flow relatively small. Utility Model Content

[0009] This application provides a flow equalization device for a fluoroplastic heat exchanger tube box, and the technical problem to be solved is: how to enhance the spiral flow effect on the fluoroplastic tube.

[0010] The technical solution adopted by this application to solve the above problems is: a flow equalization device for a fluoroplastic heat exchanger tube box, the structure of which includes a partition plate, a flow equalization opening disposed on the partition plate and used for inserting and installing fluoroplastic heat exchange tubes, a spiral strip disposed on the partition plate at one end and used for sleeved on the fluoroplastic heat exchange tubes, and a reinforcing rod disposed on the partition plate at one end and used for connecting the outer side of the spiral strip.

[0011] A further preferred technical solution includes a mounting post disposed on the partition plate and used to connect the perforated plate.

[0012] A further preferred technical solution is that the axial length of the spiral strip and the length of the reinforcing rod are both equal to the length of the mounting column.

[0013] A further preferred technical solution is that: two reinforcing rods are provided on a single spiral strip.

[0014] A further preferred technical solution is that it also includes an annular reinforcing plate disposed on the partition and used to connect the outer shell.

[0015] A further preferred technical solution includes an anti-collision outer ring disposed on the partition plate, located on the same side as the spiral strip, and used to sleeve all the spiral strips.

[0016] A further preferred technical solution includes: a shell-side fluid inlet / outlet port disposed on the anti-collision outer ring.

[0017] A further preferred technical solution is that the shape of the shell-side fluid inlet / outlet orifice is rectangular or arc-shaped.

[0018] A further preferred technical solution includes a storage and transportation protective cover disposed on the anti-collision outer ring and used to cover the spiral strip.

[0019] A further preferred technical solution includes an arc-shaped straight groove disposed on the reinforcing rod and used to engage the outer side of the spiral strip.

[0020] The beneficial effects of this application include at least the following three points.

[0021] First, without affecting the uniform flow effect of the shell-side fluid, the device also has an additional spiral flow function on the surface of the fluoroplastic heat exchange tube, which makes up for the missing spiral flow function at both ends of the fluoroplastic heat exchange tube in the prior art, thereby increasing the effective area of ​​the spiral flow and improving the heat exchange efficiency.

[0022] Secondly, the spiral strip in this device has the advantages of being stable during installation and not easily damaged before use.

[0023] Third, the device has greater installation stability inside the outer casing and on the perforated plate, and it is less prone to tilting compared to the outer casing. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this application.

[0025] Figure 2 This is a schematic diagram of one shape and distribution of the flow equalization opening in this application.

[0026] Figure 3 This is a schematic diagram showing the position of the spiral strip on the fluoroplastic heat exchange tube in this application.

[0027] Figure 4 This is a schematic diagram showing the position of the spiral strip on the pipe in the prior art.

[0028] Figure 5 This is a schematic diagram illustrating the use of the annular reinforcing plate in this application.

[0029] Figure 6 This is a schematic diagram showing the position and shape of one of the shell-side fluid inlet / outlet orifices in this application.

[0030] Figure 7 This is a schematic diagram showing the location and shape of the protective cover for transport stored in this application.

[0031] Figure 8 This is a schematic diagram showing the position and shape of the arc-shaped straight groove in this application.

[0032] Figure 9 This is a schematic diagram of one shape of a perforated plate in the prior art.

[0033] The meanings of the markings in the diagram are as follows.

[0034] Fluoroplastic heat exchange tube a, perforated plate b, outer shell c, spiral strip on tube d, shell-side inlet and outlet pipes e, tube-side end f, tube-side inlet and outlet pipes g;

[0035] 1. Partition plate; 2. Spiral strip; 4. Reinforcing rod; 5. Mounting column; 6. Annular reinforcing plate; 7. Anti-collision outer ring; 8. Shell-side fluid inlet / outlet holes; 9. Protective cover for storage and transportation; 10. Arc-shaped straight groove; 11. Outer ring surface threaded groove; 22. Flow equalization opening. Detailed Implementation

[0036] The following description is merely a preferred embodiment of this application and is not intended to limit the scope of this application.

[0037] like Figures 1-9 As shown, a flow equalization device for a fluoroplastic heat exchanger tube box includes a partition plate 1, a flow equalization opening 11 disposed on the partition plate 1 for inserting and installing a fluoroplastic heat exchange tube a, a spiral strip 2 disposed at one end on the partition plate 1 for sleeved connection of the fluoroplastic heat exchange tube a, and a reinforcing rod 4 disposed at one end on the partition plate 1 for connecting the outer side of the spiral strip 2.

[0038] In the prior art, the fluoroplastic heat exchange tube a has a built-in spiral strip d. However, considering the need for easy installation and removal of the fluoroplastic heat exchange tube a from the flow equalization device, the spiral strip d can only be positioned centrally on the fluoroplastic heat exchange tube a. Otherwise, the entire fluoroplastic heat exchange tube a, along with the entire spiral strip d, cannot be installed on the partition plate 1, and the spiral strip d cannot pass through the flow equalization opening 11.

[0039] Therefore, in this embodiment, the partition plate 1 is provided with a section of the spiral strip 2 that is only connected to the fluoroplastic heat exchange tube a, so that almost the entire fluoroplastic heat exchange tube a has a spiral flow function, ultimately ensuring that the heat exchange efficiency of the fluoroplastic heat exchanger is improved.

[0040] The main body of the flow equalization device is made of stainless steel or fluoroplastic to ensure sufficient corrosion resistance. The partition 1 is rectangular or circular in shape, respectively adapting to the rectangular or circular cross-sectional shape of the outer shell c. The flow equalization opening 11 is generally rectangular in shape, its width matching the outer diameter of the fluoroplastic heat exchange tube a, and it engages and fixes the fluoroplastic heat exchange tube a. Its length is greater than the sum of the outer diameters of multiple fluoroplastic heat exchange tubes a, ensuring that the shell-side fluid has a sufficient and suitable flow velocity at the flow equalization opening 11. For details, please refer to the appendix. Figure 2 .

[0041] Furthermore, the inner diameter of the spiral strip 2 is equal to or slightly larger than the outer diameter of the fluoroplastic heat exchange tube a, allowing the latter to be smoothly inserted into the former. A small amount of shell-side fluid will pass through the joint gap between the two, but this will not significantly affect the spiral flow function of the spiral strip 2. Thus, while significantly improving the spiral flow function, the fluoroplastic heat exchange tube a is still allowed to be relatively easy and convenient to disassemble and replace on this flow equalization device. At least it allows the flow equalization device and multiple fluoroplastic heat exchange tubes a to be manufactured and transported separately and assembled on-site, which is very convenient and practical.

[0042] On the other hand, before installation, the spiral strip 2 could only be fixed by welding one end of the flow equalization device. However, during installation, the other end of the spiral strip 2 could be welded to the orifice plate b. Both before and after installation, the structural stability of the spiral strip 2 is relatively weak. This is the purpose of the reinforcing rod 4; otherwise, the spiral flow function of the spiral strip 2 would be difficult to maintain effectively in the long term.

[0043] Similar to the spiral strip 2, before installation, the reinforcing rod 4 is only connected to the partition plate 1 at one end. During installation, the other end of the flow equalization device can be welded to the orifice plate b. The outer spiral edge of the spiral strip 2 is welded and fixed to the reinforcing rod 4, thereby improving the installation stability of the spiral strip 2.

[0044] It should be noted that the reinforcing rod 4 is located on the side of the flow equalization opening 11 and will not reduce the flow velocity at the flow equalization opening 11.

[0045] The flow equalization device also includes a mounting post 5 disposed on the partition plate 1 and used to connect the orifice plate b.

[0046] In this embodiment, the flow equalization device can be stably installed in the fluoroplastic heat exchanger in the following ways:

[0047] First, the side of the partition 1 is welded to the inner surface of the outer shell c;

[0048] Second, the spiral strip 2 and / or the reinforcing rod 4 are welded to the perforated plate b;

[0049] Third, the mounting column 5 is welded to the perforated plate b.

[0050] Accordingly, the main functions of the mounting post 5 are: to serve as the main mounting position for the partition 1; and to allow the spiral strip 2 and / or the reinforcing rod 4 to be disconnected from the perforated plate b.

[0051] The number of mounting posts 5 is 2-3.

[0052] The axial length of the spiral strip 2 and the length of the reinforcing rod 4 are both equal to the length of the mounting post 5.

[0053] In this embodiment, when the end face of the mounting column 5 is welded to the perforated plate b, the end of the spiral strip 2 and the end face of the reinforcing rod 4 are also on the perforated plate b, and all three can be welded to the perforated plate b.

[0054] Two reinforcing rods 4 are provided on a single spiral strip 2.

[0055] In this embodiment, the reinforcing rod 4 can prevent the spiral strip 2 from falling off the flow equalization opening 11, and also prevent the spiral strip 2 from being pushed by the shell-side fluid and undergoing elastic deformation. Otherwise, wear may easily occur between the spiral strip 2 and the fluoroplastic heat exchange tube a.

[0056] The flow equalization device also includes an annular reinforcing plate 3 disposed on the partition 1 and used to connect the outer casing c.

[0057] In this embodiment, the partition plate 1 and the annular reinforcing plate 3 are integrally formed, and the outer side of the annular reinforcing plate 3 engages with the inner side of the outer shell c. At this time, the annular reinforcing plate 3 is welded to the outer shell c, and also has a locking and anti-tipping function, thereby improving the installation stability of the flow equalization device in the fluoroplastic heat exchanger.

[0058] Correspondingly, even if the flow equalization device is not installed stably, it can only slide and shift, and it cannot tilt or fall over.

[0059] The flow equalization device also includes an anti-collision outer ring 6 disposed on the partition 1 and located on the same side as the spiral strip 2, and used to fit all the spiral strips 2.

[0060] In this embodiment, the outer surface shape and size of the anti-collision outer ring 6 are consistent with those of the annular reinforcing plate 3. The axial length of the anti-collision outer ring 6 is equal to that of the spiral strip 2, and it is fitted over all the spiral strips 2. Its functions include at least the following three:

[0061] First, when the flow equalization device is stored and transported, if the spiral strip 2 falls downwards or if a lateral impact force comes towards the spiral strip 2, the anti-collision outer ring 6 can prevent the spiral strip 2 from being damaged by impact.

[0062] Secondly, during installation, the anti-collision outer ring 6 is also fitted onto the inner surface of the outer shell c, increasing the effective fitting length between the flow equalization device and the outer shell c, thus improving the installation stability of the flow equalization device.

[0063] Third, the restriction that the mounting post 5 must be welded to the orifice plate b is removed. Even if the mounting post 5 and the anti-collision outer ring 6 only abut against the orifice plate b, relatively high installation stability can still be provided.

[0064] The flow equalization device also includes shell-side fluid inlet / outlet holes 7 disposed on the anti-collision outer ring 6.

[0065] In this embodiment, the width of the shell-side fluid inlet / outlet hole 7 is greater than the outer diameter of the shell-side fluid inlet / outlet pipe e. Its main function is to prevent the anti-collision outer ring 6 from blocking the shell-side fluid inlet / outlet pipe e, thus ensuring the effectiveness of the shell-side fluid inlet / outlet function.

[0066] The secondary function of the shell-side fluid inlet / outlet port 7 is: if the welding operation between the end of the anti-collision outer ring 6 and the orifice plate b is difficult, the outer shell c can be installed and fixed by welding the shell-side fluid inlet / outlet port 7, which also strengthens the entire flow equalization device.

[0067] The shape of the shell-side fluid inlet / outlet port 7 is rectangular or arc-shaped.

[0068] In this embodiment, the rectangular or arc-shaped shell-side fluid inlet / outlet port 7 serves to reduce the accuracy of the circumferential alignment between the shell-side inlet / outlet pipe e and the flow equalization device, thereby reducing the installation difficulty of the flow equalization device.

[0069] The difference is that the relative circumferential angle between the flow equalization device and the orifice plate b is constant, and sufficient sealing performance needs to be ensured between the fluoroplastic heat exchange tube a and the orifice plate b.

[0070] The installation and operation of this flow equalization device, or the assembly operation of this fluoroplastic heat exchanger, can be roughly divided into the following steps:

[0071] First, insert the first flow equalization device into the outer shell c to ensure that the port of the shell-side inlet / outlet pipe e is located within the shell-side fluid inlet / outlet hole 7;

[0072] Second, the fluoroplastic heat exchange tube a is inserted into the first flow equalization device, and then the first perforated plate b is installed. The outer shell c is welded and fixed to both the first flow equalization device and the first perforated plate b.

[0073] Third, a second flow equalization device is fitted onto the fluoroplastic heat exchange tube a. At this time, the circumferential angle of the flow equalization device is unique. Then, the second flow equalization device is welded, and the second tube plate b is fitted and welded. Finally, two tube end fs are welded and installed, and there is no circumferential angle restriction between them and the tube plate b.

[0074] The flow equalization device also includes a storage and transportation protective cover 8 disposed on the anti-collision outer ring 6 and used to cover the spiral strip 2.

[0075] In this embodiment, the protective cover 8 for storage and transportation is only applicable to the circular partition 1. In this case, the outer anti-collision ring 6 is also provided with an outer ring surface threaded groove 10, which is then used for screwing the protective cover 8 for storage and transportation.

[0076] At this point, all of the spiral strips 2, reinforcing rods 4, and mounting posts 5 are completely covered by the storage and transportation protective cover 8, the anti-collision outer ring 6, and the partition 1, so that the first three are not easily damaged during storage and transportation of the flow equalization device.

[0077] When the flow equalization device is installed and used on a fluoroplastic heat exchanger, the protective cover 8 for storage and transportation is removed and left unused; its material is ordinary plastic.

[0078] The flow equalization device also includes an arc-shaped straight groove 9 disposed on the reinforcing rod 4 and used to engage the outer side of the spiral strip 2.

[0079] In this embodiment, the function of the arc-shaped straight groove 9 is to increase the contact area between the reinforcing rod 4 and the spiral strip 2, which has the following two main advantages:

[0080] First, on a plane perpendicular to the length direction of the reinforcing rod 4, the reinforcing rod 4 is engaged with the spiral strip 2, increasing the difficulty of the latter swinging compared to the former;

[0081] Secondly, this positions the weld between the reinforcing rod 4 and the spiral strip 2 relatively outward, reducing the difficulty of the welding operation, as shown in the attached figure. Figure 8 As shown, the weld is located at the end of the side of the reinforcing rod 4 section, not in the center, so the welding torch does not need to be extended much, thus reducing the welding difficulty.

[0082] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various modifications can be made without departing from the spirit of this application. These are non-inventive modifications and are protected by patent law as long as they are within the scope of the claims of this application.

Claims

1. A flow equalization device for a fluoroplastic heat exchanger tube box, characterized in that: The structure includes a partition (1), a flow equalization opening (11) disposed on the partition (1) and used for inserting and installing a fluoroplastic heat exchange tube (a), a spiral strip (2) with one end disposed on the partition (1) and used for sleeved connection of the fluoroplastic heat exchange tube (a), and a reinforcing rod (4) with one end disposed on the partition (1) and used for connecting the outer side of the spiral strip (2).

2. The flow equalization device for a fluoroplastic heat exchanger tube box according to claim 1, characterized in that: It also includes a mounting post (5) disposed on the partition (1) and used to connect the perforated plate (b).

3. The flow equalization device for a fluoroplastic heat exchanger tube box according to claim 2, characterized in that: The axial length of the spiral strip (2) and the length of the reinforcing rod (4) are both equal to the length of the mounting column (5).

4. The flow equalization device for a fluoroplastic heat exchanger tube box according to claim 1, characterized in that: Two reinforcing rods (4) are provided on a single spiral strip (2).

5. The flow equalization device for a fluoroplastic heat exchanger tube box according to claim 1, characterized in that: It also includes an annular reinforcing plate (3) disposed on the partition (1) and used to connect the outer shell (c).

6. The flow equalization device for a fluoroplastic heat exchanger tube box according to claim 1, characterized in that: It also includes an anti-collision outer ring (6) disposed on the partition (1) and located on the same side as the spiral strip (2) and used to fit all the spiral strips (2).

7. A flow equalization device for a fluoroplastic heat exchanger tube box according to claim 6, characterized in that: It also includes a shell-side fluid inlet / outlet port (7) provided on the anti-collision outer ring (6).

8. A flow equalization device for a fluoroplastic heat exchanger tube box according to claim 7, characterized in that: The shape of the shell-side fluid inlet / outlet orifice (7) is rectangular or arc-shaped.

9. A flow equalization device for a fluoroplastic heat exchanger tube box according to claim 6, characterized in that: It also includes a storage and transportation protective cover (8) disposed on the anti-collision outer ring (6) and used to cover the spiral strip (2).

10. A flow equalization device for a fluoroplastic heat exchanger tube box according to claim 1, characterized in that: It also includes an arc-shaped straight groove (9) provided on the reinforcing rod (4) and used to engage the outer side of the spiral strip (2).

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