Long hole type baffle plate assembly and shell-and-tube heat exchanger

Abstract

The utility model provides a long hole type baffle plate assembly and a shell-and-tube heat exchanger. The long hole type baffle plate assembly comprises a first baffle plate, and the first baffle plate comprises a plurality of first-class holes and a plurality of second-class holes. The first-class holes are round holes allowing one heat exchange tube to penetrate through, the multiple first-class holes are formed in rows, and the first baffle plate comprises multiple rows of first-class holes. The second-class holes are oblong holes or rectangular holes allowing the heat exchange tubes to penetrate through, the first baffle plate comprises a plurality of second-class holes, and the column formed by the first-class holes is parallel to the extending direction of the second-class holes. The shell-and-tube heat exchanger provided by the utility model comprises the long hole type baffle plate assembly.

Description

Technical Field

[0001] The present application relates to the technical field of baffles for shell and tube heat exchangers, and in particular to a long hole baffle assembly and a shell and tube heat exchanger. Background Art

[0002] The main function of a shell and tube heat exchanger is to exchange heat between the media on the inner and outer walls of its heat exchange tubes. In order to help fix the heat exchange tubes and make the shell-side media flow longer, baffles can be set.

[0003] See also Figure 1 As the inventors know, a shell and tube heat exchanger has a heat exchange tube 610 passing through each baffle 620 and extending along the axial direction of the shell and tube heat exchanger. The shell-side fluid flows in a curved path planned by the baffle 620, and the flow path is shown by the arrow line in the shell and tube heat exchanger.

[0004] However, it has the following problems:

[0005] (1) In order to stabilize the position of the heat exchange tubes, the diameters of the heat exchange tube holes arranged on the baffles for accommodating the heat exchange tubes are relatively small, which may easily scratch the heat exchange tubes during installation;

[0006] (2) In order to make the shell-side fluid have a curved path, the baffles need to be provided with cut edges, so that the baffles cannot form a circle, and the edges of the baffles cannot completely abut against the inner wall of the heat exchanger shell, resulting in low support strength;

[0007] (3) The curved path of the shell-side fluid is prone to impact vibration, and there is room for improvement in safety;

[0008] (4) The curved path of the shell-side fluid easily produces heat transfer dead zones at the curved corners, and the heat transfer efficiency needs to be improved.

[0009] Therefore, there is still room for improvement in the baffle and the corresponding shell and tube heat exchanger. Utility Model Content

[0010] In order to solve or alleviate at least one of the technical problems mentioned in the background technology, the present application provides a long hole baffle assembly and a shell and tube heat exchanger.

[0011] The long hole baffle assembly provided in the present application includes a first baffle, and the first baffle includes:

[0012] A plurality of first-class holes, wherein the first-class holes are circular holes for a heat exchange tube to pass through, the plurality of first-class holes are arranged in a row, and the first baffle includes a plurality of rows of the first-class holes;

[0013] A plurality of second-type holes are oblong holes or rectangular holes for the plurality of heat exchange tubes to pass through, and the row formed by the first-type holes is parallel to the extension direction of one of the second-type holes.

[0014] In at least one embodiment, the first type of holes and the second type of holes in a row are alternately arranged one by one on the first baffle.

[0015] In at least one embodiment, the long hole baffle assembly further includes a second baffle, the second baffle includes the first type of holes and the second type of holes, and a plurality of the second baffles are alternately arranged one by one with a plurality of the first baffles.

[0016] In the axial direction of the long hole type baffle assembly, the projections of the first type of holes in a row on the first baffle overlap with the projections of the second type of holes on the second baffle, and the projections of the second type of holes on the first baffle overlap with the projections of the first type of holes in a row on the second baffle.

[0017] In at least one embodiment, a column of the first type of holes on the first baffle corresponds to one of the second type of holes on the second baffle.

[0018] In at least one embodiment, the first baffle and the second baffle are both plate members without hems.

[0019] In at least one embodiment, the width of the second type of holes is greater than the diameter of the first type of holes.

[0020] The shell and tube heat exchanger provided in the present application includes the long hole baffle assembly as described above.

[0021] In at least one embodiment, the shell and tube heat exchanger comprises:

[0022] A shell, wherein the long hole baffle assembly is arranged in the shell;

[0023] A plurality of heat exchange tubes, wherein the heat exchange tubes pass through the first type of holes and the second type of holes;

[0024] Tube sheets are arranged at both ends of the shell, and the heat exchange tubes are fixed to the tube sheets.

[0025] In at least one embodiment, a circular edge of the first baffle is connected to an inner wall surface of the shell.

[0026] The shell and tube heat exchanger provided in this application includes:

[0027] The slotted baffle assembly as described above;

[0028] A plurality of heat exchange tubes, one of the heat exchange tubes simultaneously passes through the first type of holes and the second type of holes alternately arranged in the axial direction.

[0029] Compared to the heat exchange holes on the existing baffles (which can be compared to the first type of holes), the second type of holes (heat exchange holes) in the baffle assembly provided by the present application are long holes, and the area between the first type of holes is also utilized, so that the overall gap between the second type of holes and the heat exchange tubes is larger, which can reduce the friction between the heat exchange tubes and the baffles when installing the heat exchange tubes, and reduce scratch losses. The shell-side fluid can flow axially from the gap between the second type of holes and the heat exchange tubes. Compared to the traditional route with large bends, the axial flow route provided by the present application allows the shell-side fluid to flow close to the heat exchange tubes, with fewer heat exchange dead zones, high heat exchange efficiency, and a smooth route that is not prone to impact vibration. Compared to the multiple holes on the existing baffles, the second type of holes are arranged in the form of long holes so that their number is small and processing is convenient.

[0030] The shell and tube heat exchanger provided in the present application also has the above advantages because it includes the aforementioned long hole baffle assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The figure shows a schematic structural diagram of a shell and tube heat exchanger known to the inventor.

[0032] Figure 2 A schematic structural diagram of a long hole baffle assembly according to an embodiment of the present application is shown.

[0033] Figure 3 A schematic structural diagram of a shell and tube heat exchanger according to an embodiment of the present application is shown.

[0034] Figure 4 A partial enlarged view of a shell and tube heat exchanger according to an embodiment of the present application is shown.

[0035] Description of Reference Numerals

[0036] 100 first baffle; 110 first type hole; 120 second type hole; 200 second baffle; 300 heat exchange tube; 400 shell; 500 tube sheet; 610 heat exchange tube; 620 baffle. DETAILED DESCRIPTION

[0037] The exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the present application, and are not intended to exhaust all possible methods of the present application, nor to limit the scope of the present application.

[0038] The embodiments of the present application provide a long hole baffle assembly and a shell and tube heat exchanger.

[0039] See also Figure 2The long hole baffle assembly provided in the embodiment of the present application may include a first baffle 100. The first baffle 100 may include a plurality of first-class holes 110 and a plurality of second-class holes 120. The first-class holes 110 are circular holes for a heat exchange tube 300 to pass through, and the plurality of first-class holes 110 are arranged in a row, so that a plurality of rows of first-class holes 110 are formed on the first baffle 100. The second-class holes 120 are circular holes for a plurality of heat exchange tubes 300 (see Figure 3 ) through which the oblong hole or rectangular hole passes, the first baffle plate 100 includes a plurality of second-type holes 120, and the row formed by the first-type holes 110 is parallel to the extension direction of the second-type holes 120 (for example Figure 2 The double arrow line in the figure is parallel to the direction of the double arrow line.

[0040] Among them, the size of the first type of hole 110 can be set according to, for example, the national standard for heat exchangers (GB / T 151-2014). It can be understood that according to the national standard, there is a gap between the heat exchange tubes 300, and the heat exchange holes in the prior art and the first type of holes 110 in this application all have corresponding gaps. The second type of hole 120 in this application is a long hole, which is equivalent to utilizing the gap area between the first type of holes 110, so that the overall gap between the second type of hole 120 and the heat exchange tube 300 is larger, which can reduce the friction between the heat exchange tube 300 and the long hole baffle assembly when installing the heat exchange tube 300, and reduce scratches. The shell-side fluid can flow axially from the gap between the second type of hole 120 and the heat exchange tube 300. Compared with the traditional route with large bends, the axial flow route provided by the present application allows the shell-side fluid to flow close to the heat exchange tube 300, with fewer heat exchange dead zones, higher heat exchange efficiency, and a smooth route that is not prone to impact vibration. Compared with the multiple holes on the existing baffles, the second type of holes 120 are arranged in the form of long holes so that their number is small and processing is convenient.

[0041] In one embodiment of the present application, the first type of holes 110 and the second type of holes 120 in a row are arranged alternately one by one on the first baffle 100. Of course, two rows of the first type of holes 110 can be arranged as a group, and two rows of the second type of holes 120 can be arranged alternately as a group, so that the rows formed by the first type of holes 110 and the second type of holes 120 are arranged alternately in pairs on the baffle. Of course, they can also be arranged alternately in pairs, and the present application does not limit the alternation form.

[0042] In one embodiment of the present application, the slotted hole baffle assembly may further include a second baffle 200, the second baffle 200 includes a first type of hole 110 and a second type of hole 120, and a plurality of second baffles 200 are alternately arranged one by one with a plurality of first baffles 100. In the axial direction of the slotted hole baffle assembly, the first type of holes 110 in a row on the first baffle 100 overlap with the projections of the second type of holes 120 on the second baffle 200, and the second type of holes 120 on the first baffle 100 overlap with the projections of the first type of holes 110 in a row on the second baffle 200.

[0043] See also Figure 4 The present application realizes a small zigzag movement of the liquid by alternating two types of baffles, which not only enables the baffles to support the heat exchange tubes 300, but also maximizes the axial flow of the shell-side fluid, thereby increasing the heat transfer effect. Of course, the first baffles 100 and the second baffles 200 may also be alternated in pairs, and the present application does not limit the alternating form.

[0044] In one embodiment of the present application, the width W of the second type of hole 120 is not less than the diameter D of the first type of hole. For example, the width W of the second type of hole 120 may be equal to the diameter D of the first type of hole. A row of the first type of holes 110 on the first baffle 100 corresponds to one second type of hole 120 on the second baffle 200. Of course, the width W of the second type of hole 120 may be further increased, so that, for example, more than two rows of the first type of holes 110 on the first baffle 100 correspond to one second type of hole 120 on the second baffle 200. Furthermore, the length of the second type of hole 120 (the size of the second type of hole 120 in its extension direction) may be reduced, so that, for example, more than two second type of holes 120 on the first baffle 100 correspond to one row of the first type of holes 110 on the second baffle 200.

[0045] In one embodiment of the present application, the first baffle 100 and the second baffle 200 are both plate components without hems, such as circular plates. It can be understood that Figure 2 Only half of the first baffle 100 and the second baffle 200 are shown.

[0046] The shell and tube heat exchanger provided in the embodiments of the present application may include the aforementioned long hole baffle assembly.

[0047] In one embodiment of the present application, see Figure 3 The shell and tube heat exchanger may further include a shell 400, a heat exchange tube 300 and a tube sheet 500. The long hole baffle assembly is arranged in the shell 400, and the heat exchange tube 300 passes through the first type of hole 110 and the second type of hole 120. The tube sheet 500 is arranged at both ends of the shell 400, and the heat exchange tube 300 is fixed to the tube sheet 500. Among them, one heat exchange tube 300 can simultaneously pass through the first type of hole 110 and the second type of hole 120 alternately arranged in the axial direction.

[0048] In one embodiment of the present application, see Figure 3 A shell-side inlet 410 and a shell-side outlet 420 may be respectively disposed at both ends of the shell 400 .

[0049] In one embodiment of the present application, the circular edge of the first baffle 100 abuts against the inner wall surface of the shell 400. It can be understood that, compared with the baffle with folded edges, the circular baffle provided in the present application can support the shell 400 in the form of a full circle, increase the rigidity of the shell 400, and make the heat exchanger as a whole more durable.

[0050] It is understood that the cross section of the housing 400 is not limited to a circle, and may be, for example, an ellipse or an oblong. Similarly, the first baffle 100 and the second baffle 200 may be elliptical or oblong, respectively.

[0051] In one embodiment of the present application, tie rod holes for installing tie rods may be provided at corresponding positions on the first baffle plate 100 and the second baffle plate 200 .

[0052] The above is a preferred embodiment of the present application. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A long hole baffle assembly, characterized in that: A first baffle is included, wherein the first baffle comprises: A plurality of first-class holes, wherein the first-class holes are circular holes for a heat exchange tube to pass through, the plurality of first-class holes are arranged in a row, and the first baffle includes a plurality of rows of the first-class holes; A plurality of second-type holes are oblong holes or rectangular holes for the plurality of heat exchange tubes to pass through, and the row formed by the first-type holes is parallel to the extension direction of one of the second-type holes.

2. The long hole baffle assembly according to claim 1, characterized in that: The first type of holes and the second type of holes in a row are arranged alternately one by one on the first baffle.

3. The long hole baffle assembly according to claim 1, characterized in that: The long hole baffle assembly further includes a second baffle, the second baffle includes the first type of holes and the second type of holes, and a plurality of the second baffles are alternately arranged one by one with a plurality of the first baffles. In the axial direction of the long hole type baffle assembly, the projections of the first type of holes in a row on the first baffle overlap with the projections of the second type of holes on the second baffle, and the projections of the second type of holes on the first baffle overlap with the projections of the first type of holes in a row on the second baffle.

4. The long hole baffle assembly according to claim 3, characterized in that: A column of the first type of holes on the first baffle corresponds to one of the second type of holes on the second baffle.

5. The long hole baffle assembly according to claim 3, characterized in that: The first baffle and the second baffle are both plate components without folded edges.

6. The long hole baffle assembly according to claim 1, characterized in that: The width of the second type of holes is greater than the diameter of the first type of holes.

7. A shell and tube heat exchanger, characterized in that: A long hole baffle assembly comprising any one of claims 1 to 6.

8. The shell and tube heat exchanger according to claim 7, characterized in that: The shell and tube heat exchanger comprises: A shell, wherein the long hole baffle assembly is arranged in the shell; A plurality of heat exchange tubes, wherein the heat exchange tubes pass through the first type of holes and the second type of holes; Tube sheets are arranged at both ends of the shell, and the heat exchange tubes are fixed to the tube sheets.

9. The shell and tube heat exchanger according to claim 8, characterized in that: The circular edge of the first baffle is connected to the inner wall surface of the shell.

10. A shell and tube heat exchanger, characterized in that: include: The long hole baffle assembly according to any one of claims 3 to 5; A plurality of heat exchange tubes, one of the heat exchange tubes simultaneously passes through the first type of holes and the second type of holes alternately arranged in the axial direction.

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