Heat exchanger structure capable of improving heat exchange efficiency

Abstract

The utility model relates to a heat exchanger structure capable of improving heat exchange efficiency, which comprises a tube plate, a shell, a plurality of support plates and a plurality of heat exchange tubes, a shell pass medium inlet tube is arranged above the shell, a shell pass medium outlet tube is arranged below the shell, an upper distribution plate component is arranged between the shell pass medium inlet tube and the upper heat exchange tube, and a lower distribution plate component is arranged between the shell pass medium outlet tube and the lower heat exchange tube. A lower distribution plate assembly is arranged between the shell pass medium outlet pipe and the lower heat exchange pipe, the upper distribution plate assembly comprises a first end plate, a second end plate, an upper distribution plate and a rib plate, and the lower distribution plate assembly comprises a third end plate, a fourth end plate, a lower distribution plate, a first sliding plate and a second sliding plate. A first supporting seat and a second supporting seat are arranged at the bottom in the shell, the first sliding plate is supported on the first supporting seat and can longitudinally slide on the first supporting seat, and the second sliding plate is supported on the second supporting seat and can longitudinally slide on the second supporting seat, so that the heat exchange efficiency is greatly improved.

Description

[Technical Field]

[0001] This utility model relates to the field of heat exchangers, and in particular to a heat exchanger structure that can improve heat exchange efficiency. [Background Technology]

[0002] A heat exchanger is a device that transfers part of the heat from a hot fluid to a cold fluid; it is also called a heat exchanger. Heat exchangers play an important role in chemical, petroleum, power, food, and many other industrial productions. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators, and reboilers, and are widely used. Shell-and-tube heat exchangers mainly consist of a shell, tube bundle, tube sheet, and end caps. The two fluids exchanging heat within a shell-and-tube heat exchanger flow in two directions: one flows inside the tubes (the tube side), and the other flows outside the tubes (the shell side). The wall surface of the tube bundle is the heat transfer surface.

[0003] Please see Figure 1 In its earliest design, the equipment did not have an anti-impact baffle at the shell-side medium inlet pipe 1'. The shell-side medium entered through the inlet pipe 1' and exited through the outlet pipe 2'. This structure had the following drawbacks: 1. The shell-side medium entering through the inlet pipe 1' would directly impinge on the heat exchange tubes 3', affecting their structural strength; 2. Because the heat exchange tubes 3' were transversely elongated, during operation, it was frequently observed that no shell-side medium flowed through the heat exchange tubes at both ends of the equipment, significantly reducing their heat exchange efficiency. To address these technical problems, those skilled in the art later improved the equipment's structure. Please refer to [link to relevant documentation]. Figure 2 The shell-side medium inlet pipe 1'' is equipped with an anti-impact baffle 2'' to prevent the shell-side medium from directly impacting the heat exchange tube 3''. However, the drawback of this anti-impact baffle 2'' structure is that although the heat exchange tube 3' located directly below the anti-impact baffle 2'' avoids the impact of the shell-side medium, the heat exchange efficiency is greatly reduced because no shell-side medium flows through this position. Therefore, we are thinking about how to design a new structure that can both prevent the shell-side medium from impacting the heat exchange tube and make the shell-side medium evenly distributed on the heat exchange tube, thereby improving the heat exchange efficiency. [Utility Model Content]

[0004] To address the aforementioned problems, the purpose of this invention is to provide a heat exchanger structure that can improve heat exchange efficiency.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a heat exchanger structure that can improve heat exchange efficiency, comprising: a tube sheet, a shell, several support plates, and several heat exchange tubes. The heat exchange tubes are supported on the support plates, and both the heat exchange tubes and the support plates are located inside the shell. The free ends of the heat exchange tubes are welded to the tube sheet. A shell-side medium inlet pipe is provided above the shell, and a shell-side medium outlet pipe is provided below the shell. An upper distribution plate assembly is provided between the shell-side medium inlet pipe and the upper heat exchange tube, and a lower distribution plate assembly is provided between the shell-side medium outlet pipe and the lower heat exchange tube. The upper distribution plate assembly includes: a first end plate, a second end plate, and an upper distribution plate and stiffeners disposed between the first end plate and the second end plate. The upper distribution plate is provided with several upper... The distribution plate assembly includes a third end plate, a fourth end plate, a lower distribution plate disposed between the third end plate and the fourth end plate, a first sliding plate, and a second sliding plate. A first support seat and a second support seat are provided at the bottom of the housing. The first sliding plate is supported on the first support seat and can slide longitudinally on the first support seat. The second sliding plate is supported on the second support seat and can slide longitudinally on the second support seat. The lower distribution plate has several lower distribution holes. The third end plate is connected to the tube plate through several third fixings, and the fourth end plate is connected to the support plate through several fourth fixings.

[0006] Preferably, the heat exchanger structure of the present invention that can improve heat exchange efficiency is further configured such that the number of stiffeners is three.

[0007] Preferably, the heat exchanger structure of the present invention that can improve heat exchange efficiency is further configured such that the first fixing member and the third fixing member are both tie rods, spacer tubes and nuts.

[0008] Preferably, the heat exchanger structure of the present invention that can improve heat exchange efficiency is further configured such that the second fixing member and the fourth fixing member are both bolts and nuts.

[0009] Preferably, the heat exchanger structure of the present invention that can improve heat exchange efficiency is further configured such that the first sliding plate and the second sliding plate are arranged in parallel.

[0010] Preferably, the heat exchanger structure of the present invention that can improve heat exchange efficiency is further configured such that: a plurality of first protrusions are provided above the first slide plate and welded to the lower distribution plate, and a first gap is formed between each pair of adjacent first protrusions.

[0011] Preferably, the heat exchanger structure of the present invention that can improve heat exchange efficiency is further configured such that: a plurality of second protrusions are provided above the second slide plate and welded to the lower distribution plate, and a second gap is formed between each pair of adjacent second protrusions.

[0012] Preferably, the heat exchanger structure of the present invention that can improve heat exchange efficiency is further configured such that: the thickness of the stiffener is 8mm, and the thickness of the first sliding plate and the second sliding plate is 20mm.

[0013] Preferably, the heat exchanger structure of the present invention that can improve heat exchange efficiency is further configured such that a plurality of upper distribution holes are evenly arranged on the upper distribution plate.

[0014] Preferably, the heat exchanger structure of the present invention that can improve heat exchange efficiency is further configured such that a plurality of lower distribution holes are evenly arranged on the lower distribution plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects: By providing an upper distribution plate assembly between the shell-side medium inlet pipe and the upper heat exchange tube, and by providing a lower distribution plate assembly between the shell-side medium outlet pipe and the lower heat exchange tube, the shell-side medium can flow evenly through the heat exchange tube, thereby greatly improving the heat exchange efficiency. In addition, the setting of the upper distribution plate also avoids the impact of the shell-side medium on the heat exchange tube near the shell-side medium inlet pipe, thereby extending the service life of the heat exchange tube. The present invention also greatly reduces the difficulty of heat exchange tube assembly by designing the structure of the sliding plate and the support base. The upper and lower distribution plate assemblies in the present invention are detachable from the tube sheet and the support plate, thereby facilitating subsequent heat exchange tube maintenance. [Attached Image Description]

[0016] Figure 1 This is a schematic diagram of the earliest existing structure without anti-impact baffles.

[0017] Figure 2 This is a schematic diagram of a structure in the prior art that incorporates an anti-impact baffle.

[0018] Figure 3 This is a schematic diagram of the heat exchanger in this utility model.

[0019] Figure 4 For along Figure 3 A schematic diagram of the cross-sectional structure along line AA.

[0020] Figure 5 This is a schematic diagram of the main structure of the upper distribution plate assembly.

[0021] Figure 6 This is a side view of the upper distribution plate assembly.

[0022] Figure 7 It is a top view structural schematic diagram of the upper distribution plate assembly.

[0023] Figure 8 It is a front view structural schematic diagram of the lower distribution plate assembly.

[0024] Figure 9 It is a side view structural schematic diagram of the lower distribution plate assembly.

[0025] Figure 10 It is a top view structural schematic diagram of the lower distribution plate assembly.

[0026] Figure 11 It is a structural schematic diagram of the first slide plate.

[0027] Figure 12 It is a structural schematic diagram of the second slide plate.

[0028] Figure 1 In it: 1`, shell-side medium inlet pipe, 2`, shell-side medium outlet pipe, 3`, heat exchange tube.

[0029] Figure 2 In it: 1``, shell-side medium inlet pipe, 2``, impact prevention baffle, 3``, heat exchange tube.

[0030] Figures 3 to 12 In it: 1, tube sheet, 2, shell, 20, shell-side medium inlet pipe, 21, shell-side medium outlet pipe, 22, first support seat, 23, second support seat, 3, support plate, 30, short support plate, 31, long support plate, 4, heat exchange tube, 5, upper distribution plate assembly, 50, first end plate, 51, second end plate, 52, upper distribution plate, 520, upper distribution hole, 53, rib plate, 54, first fixing member, 540, tie rod, 541, spacer tube, 542, nut, 55, second fixing member, 6, lower distribution plate assembly, 60, third end plate, 61, fourth end plate, 62, lower distribution plate, 620, lower distribution hole, 63, first slide plate, 630, first boss, 631, first vacant part, 64, second slide plate, 640, second boss, 641, second vacant part, 65, third fixing member, 66, fourth fixing member.

Specific Embodiment

[0031] The following further describes in detail a heat exchanger structure capable of improving heat exchange efficiency according to the present utility model through specific embodiments.

[0032] Refer Figures 3 to 12As shown, a heat exchanger structure that can improve heat exchange efficiency includes: a tube sheet 1, a shell 2, several support plates 3 and several heat exchange tubes 4. The heat exchange tubes 4 are supported on the support plates 3, and both the heat exchange tubes 4 and the support plates are located inside the shell 2. The free ends of the heat exchange tubes 4 are welded to the tube sheet 1. In this embodiment, the support plate 3 includes seven short support plates 30 and one long support plate 31, wherein the long support plate 31 is located on the far right.

[0033] The shell-side medium inlet pipe 20 is provided above the shell 2, and the shell-side medium outlet pipe 21 is provided below the shell 2. An upper distribution plate assembly 5 is provided between the shell-side medium inlet pipe 20 and the upper heat exchange tube. The upper distribution plate assembly 5 includes: a first end plate 50, a second end plate 51, an upper distribution plate 52 and stiffeners 53 disposed between the first end plate 50 and the second end plate 51. In this embodiment, there are three stiffeners 53, and the three stiffeners 53 are arranged in parallel. The lower surface of the stiffeners 53 is welded to the upper surface of the upper distribution plate 52. The upper distribution plate 52 is provided with a plurality of evenly distributed upper distribution holes 520. The first end plate 50 and the tube sheet 1 are connected by a plurality of first fixing members 54. In this embodiment, the first fixing members 54 are tie rods 540, spacer tubes 541 and nuts 542. One free end of the tie rod 540 is screwed into the tube sheet 1, the spacer tube 541 is sleeved on the tie rod 540, and the nut 542 is disposed on the other free end of the tie rod 540, thereby fixing the first end plate 50 to the tube sheet 1. The second end plate 51 is connected to the long support plate 31 by a plurality of second fasteners 55. In this embodiment, the second fasteners 55 are bolts and nuts. The upper distribution plate 52 avoids the impact of the shell-side medium on the heat exchange tubes near the shell-side medium inlet pipe 20, thereby extending the service life of the heat exchange tubes 4.

[0034] A lower distribution plate assembly 6 is provided between the shell-side medium outlet pipe 21 and the lower heat exchange pipe. The lower distribution plate assembly 6 includes: a third end plate 60, a fourth end plate 61, and a lower distribution plate 62, a first sliding plate 63, and a second sliding plate 64 disposed between the third end plate 60 and the fourth end plate 61. A first support base 22 and a second support base 23 are provided at the bottom inside the shell 2. In this embodiment, both the first support base 22 and the second support base 23 are made of angle steel. The first sliding plate 63 is supported on the first support base 22 and can slide longitudinally on the first support base 22. The second sliding plate 64 is supported on the second support base 23 and can slide longitudinally on the second support base 23. The first sliding plate 63 and the second sliding plate 64 are arranged in parallel and slide synchronously. The lower distribution plate 62 has a plurality of evenly distributed lower distribution holes 620. The third end plate 60 is connected to the tube plate 1 by a plurality of third fasteners 65. In this embodiment, the third fasteners 65 are tie rods, spacer tubes, and nuts. The fourth end plate 61 is connected to the long support plate 31 by a plurality of fourth fasteners 66. In this embodiment, the fourth fasteners 66 are bolts and nuts. The upper part of the first slide plate 63 has a plurality of first protrusions 630 welded to the lower distribution plate 62, and a first gap 631 is formed between every two adjacent first protrusions 630. The upper part of the second slide plate 64 has a plurality of second protrusions 640 welded to the lower distribution plate 62, and a second gap 641 is formed between every two adjacent second protrusions 640. In this embodiment, the thickness of the stiffener 53 is 8mm, and the thickness of both the first slide plate 63 and the second slide plate 64 is 20mm. Because the stiffening plate 53 is located at the top and does not need to bear weight, it is designed to be relatively thin. Since the stiffening plate 53 is thin, it will not block the upper distribution holes 520 on the upper distribution plate 52. Therefore, the stiffening plate 53 and the upper distribution plate 52 are directly welded. The first sliding plate 63 and the second sliding plate 64 are located at the bottom and need to bear weight, so they are designed to be relatively thick. If the first sliding plate 63 and the second sliding plate 64 were also directly welded to the lower distribution plate 62, they would block many of the lower distribution holes 620. Therefore, we have provided bosses above the first sliding plate 63 and the second sliding plate 64, which are then welded to the lower distribution plate 62, creating gaps between the bosses. This minimizes the blockage of the lower distribution holes 620.When assembling, the tube sheet 1, heat exchange tube 4, upper distribution plate assembly 5, and lower distribution plate assembly 6 are first assembled into a single unit. Then, the first sliding plate 63 is placed on the first support seat 22 at the bottom of the housing 2, and the second sliding plate 64 is placed on the second support seat 23 at the bottom of the housing 2. By sliding the first sliding plate 63 on the first support seat 22 and the second sliding plate 64 on the second support seat 23, the single unit is pushed into the housing 2 from left to right, which greatly reduces the difficulty of assembling the heat exchange tube 4.

[0035] The working principle of the heat exchanger in this utility model is as follows: the shell-side medium enters from the shell-side medium inlet pipe 20 above the shell 2, then reaches the upper distribution plate 52, and falls evenly onto the heat exchange tube 4 through several upper distribution holes 520 provided on the upper distribution plate 52 to exchange heat with the tube-side medium in the heat exchange tube 4. Then it falls from the lower distribution hole 620 on the lower distribution plate 62 and finally exits through the shell-side medium outlet pipe 21 below the shell 2.

[0036] In summary, this utility model provides an upper distribution plate assembly between the shell-side medium inlet pipe and the upper heat exchange tube, and a lower distribution plate assembly between the shell-side medium outlet pipe and the lower heat exchange tube, thereby enabling the shell-side medium to flow evenly through the heat exchange tube and greatly improving the heat exchange efficiency. In addition, the upper and lower distribution plate assemblies in this utility model are detachable from the tube sheet and support plate, which facilitates subsequent maintenance of the heat exchange tube.

[0037] The above embodiments are merely illustrative of the principles and effects of this utility model, as well as some of its applications, and are not intended to limit this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A heat exchanger structure capable of improving heat exchange efficiency, comprising: The application relates to a heat exchanger, which comprises a tube sheet, a shell, a plurality of support plates and a plurality of heat exchange tubes, the heat exchange tubes are supported on the support plates, and the heat exchange tubes and the support plates are located in the shell, the free ends of the heat exchange tubes are welded to the tube sheet, and the upper portion of the shell is provided with a shell medium inlet pipe, the lower portion of the shell is provided with a shell medium outlet pipe, an upper distribution plate assembly is arranged between the shell medium inlet pipe and the upper heat exchange tubes, a lower distribution plate assembly is arranged between the shell medium outlet pipe and the lower heat exchange tubes, the upper distribution plate assembly comprises a first end plate, a second end plate, an upper distribution plate arranged between the first end plate and the second end plate and a rib plate, a plurality of upper distribution holes are arranged on the upper distribution plate, the first end plate is connected with the tube sheet through a plurality of first fixing members, the second end plate is connected with the support plate through a plurality of second fixing members, the lower distribution plate assembly comprises a third end plate, a fourth end plate, a lower distribution plate arranged between the third end plate and the fourth end plate, a first sliding plate and a second sliding plate, the bottom of the shell is provided with a first support seat and a second support seat, the first sliding plate is supported on the first support seat and can longitudinally slide on the first support seat, the second sliding plate is supported on the second support seat and can longitudinally slide on the second support seat, a plurality of lower distribution holes are arranged on the lower distribution plate, the third end plate is connected with the tube sheet through a plurality of third fixing members, and the fourth end plate is connected with the support plate through a plurality of fourth fixing members.

2. The heat exchanger structure of claim 1, wherein: The number of the rib plates is three.

3. The heat exchanger structure of claim 1, wherein: The first fixing members and the third fixing members are pull rods, fixed-distance pipes and nuts.

4. The heat exchanger structure of claim 1, wherein: The second fixing members and the fourth fixing members are bolts and nuts.

5. The heat exchanger structure of claim 1, wherein: The first sliding plate and the second sliding plate are arranged in parallel.

6. The heat exchanger structure of claim 1, wherein: The upper portion of the first sliding plate is provided with a plurality of first bosses welded to the lower distribution plate, and a first empty part is formed between every two adjacent first bosses.

7. The heat exchanger structure according to claim 1, wherein: The upper portion of the second sliding plate is provided with a plurality of second bosses welded to the lower distribution plate, and a second empty part is formed between every two adjacent second bosses.

8. The heat exchanger structure according to claim 1, wherein: The thickness of the rib plate is 8 mm, and the thickness of the first sliding plate and the second sliding plate is 20 mm.

9. The heat exchanger structure of claim 1, wherein: The plurality of upper distribution holes are uniformly arranged on the upper distribution plate.

10. The heat exchanger structure of claim 1, wherein: The plurality of lower distribution holes are uniformly arranged on the lower distribution plate.

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