Novel anti-impact structure of shell-and-tube heat exchanger

Abstract

In order to solve the technical problems that an existing shell-and-tube heat exchanger anti-impact structure is extremely inconvenient to install and overhaul and poor in stability, the novel shell-and-tube heat exchanger anti-impact structure comprises a heat exchanger shell, and a first rib and a second rib are arranged in the heat exchanger shell in the medium entering direction; and one ends, close to a heat exchange tube in the heat exchanger, of the first rib and the second rib are connected with the annular plate. The overall strength and rigidity of the anti-impact structure are improved, and the service life of the anti-impact structure is prolonged; the disassembly and assembly process becomes simple and fast, and the maintenance time and cost are greatly reduced; and the problem of neglected loading can be effectively solved. And unnecessary cost expenditure caused by wrong installation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of shell and tube heat exchangers, in particular to a novel anti-impact structure of a shell and tube heat exchanger. Background Art

[0002] In a shell and tube heat exchanger, the fluid has a high velocity at the inlet, and directly scouring the tube bundle will cause erosion and damage. The anti-scouring structure can change the flow direction of the fluid and prevent it from directly impacting the tube bundle, thereby extending the service life of the heat exchanger.

[0003] According to GB / T151-2014, shell and tube heat exchanger has a,ρv2>2230kg / (ms 2 ) non-abrasive single-phase fluid, b,ρv2>2230kg / (ms 2 ) abrasive liquids, c, abrasive gases, steam (gas) and gas-liquid mixtures require a bumper or guide tube structure. At the same time, according to the provisions of GB / T151-2014, when the pipe does not use an expansion pipe or guide tube structure, the diameter of the circular bumper (the side length of the square bumper) should be greater than the sum of the inner diameter of the inlet pipe and 50mm. Based on the requirements of the heat exchange process, the heat exchange tubes are arranged more compactly in the shell and tube heat exchanger, which results in a relatively small installation space for the bumper in the shell and tube heat exchanger. The prior art uses a flat bumper structure. Refer to the attached Figure 1 and attached Figure 2 , its installation is complicated, maintenance is extremely inconvenient, and stability is poor. Therefore, how to improve the new anti-impact structure of shell and tube heat exchanger to improve its installation efficiency has become a technical problem to be solved urgently by those skilled in the art. Utility Model Content

[0004] The utility model aims to solve the technical problems existing in the prior art and provide a new anti-impact structure for a shell and tube heat exchanger. The technical solution of the utility model is achieved through the following measures:

[0005] A novel anti-impact structure for a shell and tube heat exchanger comprises a heat exchanger pipe, wherein a first rib and a second rib are arranged in the heat exchanger pipe along the direction of medium entry; and further comprises an annular plate, wherein the first rib and the second rib are connected to the annular plate at one end close to the heat exchange tube in the heat exchanger.

[0006] Furthermore, a plurality of the first ribs and the second ribs are provided, and the plurality of first ribs and the second ribs are alternately arranged.

[0007] Furthermore, a cone plate is provided between the first rib and the second rib.

[0008] Furthermore, the cone angle of the cone plate is set to 80-100°.

[0009] Furthermore, one end of the conical plate is connected to the circular ring plate.

[0010] Furthermore, one ends of the first rib and the second rib, which are far away from the heat exchange tubes inside the heat exchanger, are fixedly connected to the heat exchanger nozzle.

[0011] In the specific use of the present application, the first rib and the second rib are arranged inside the heat exchanger shell along the direction of the medium entering. Such a layout not only optimizes the structure inside the shell, but more importantly, significantly improves the overall strength and stiffness of the anti-impact structure. Under the impact of the high-speed flowing medium, this enhanced structure can better protect the heat exchange tubes and avoid damage caused by erosion and vibration, thus greatly extending the service life of the anti-impact structure. One ends of the first rib and the second rib, which are close to the heat exchange tubes inside the heat exchanger, are both connected to the circular ring plate, enhancing the stability of the overall structure and also bringing great convenience and flexibility. In actual operation, this design makes the disassembly and assembly process simple and fast, greatly reducing the maintenance time and cost. In addition, through the connection with the circular ring plate, the problem of missing installation can be effectively solved, reducing unnecessary cost expenditure caused by incorrect installation. At the same time, this design is also very conducive to later maintenance and replacement. After the heat exchanger has been running for a long time, it may be necessary to repair or replace some components. At this time, this simple and stable connection method will greatly simplify the maintenance process, improve the maintenance efficiency, and provide a strong guarantee for the continuous and stable operation of the tubular heat exchanger. Description of the Drawings

[0012] Figure 1 is the first schematic diagram of the existing design of the new anti-impact structure of the shell-and-tube heat exchanger;

[0013] Figure 2 is the second schematic diagram of the existing design of the new anti-impact structure of the shell-and-tube heat exchanger;

[0014] Figure 3 is the first perspective schematic diagram of the new anti-impact structure of the shell-and-tube heat exchanger of the present utility model;

[0015] Figure 4 is the second perspective schematic diagram of the new anti-impact structure of the shell-and-tube heat exchanger of the present utility model.

[0016] Reference Signs:

[0017] 100 Heat exchanger nozzle, 110 Anti-impact plate of the prior art, 120 Anti-impact structure of the present utility model, 121 First rib, 122 Second rib, 123 Circular ring plate, 124 Conical plate. Detailed Embodiments

[0018] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0019] In the description of the present utility model, unless otherwise specified and defined, it should be noted that the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the communication inside two elements. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0020] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0021] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0022] As Figure 3 、 4 shown, a novel anti - impact structure for a shell - and - tube heat exchanger includes a heat exchanger nozzle 100. Along the direction of the medium entering the heat exchanger nozzle 100, a first rib 121 and a second rib 122 are arranged. It also includes an annular plate 123. One end of the first rib 121 and the second rib 122 close to the heat exchange tubes inside the heat exchanger is connected to the annular plate 123.

[0023] In the specific use of this application, the first rib 121 and the second rib 122 are arranged in the heat exchanger nozzle 100 along the direction of the medium entering. Such a layout not only optimizes the structure inside the shell, but more importantly, significantly improves the overall strength and stiffness of the impact-resistant structure. Under the impact of the high-speed flowing medium, this enhanced structure can better protect the heat exchange tubes and avoid damage caused by erosion and vibration, thus greatly extending the service life of the impact-resistant structure. One end of the first rib 121 and the second rib 122 close to the heat exchange tubes inside the heat exchanger is connected to the circular ring plate 123, which enhances the stability of the overall structure and also brings great convenience and flexibility. In actual operation, this design makes the disassembly and assembly process simple and fast, greatly reducing the maintenance time and cost. In addition, through the connection with the circular ring plate 123, the problem of missing installation can be effectively solved, reducing unnecessary cost expenditures caused by incorrect installation. At the same time, this design is also very conducive to later maintenance and replacement. After the heat exchanger has been running for a long time, it may be necessary to repair or replace some components. At this time, this simple and stable connection method will greatly simplify the maintenance process, improve the maintenance efficiency, and provide a strong guarantee for the continuous and stable operation of the tubular heat exchanger.

[0024] Further, in other embodiments of this application, a plurality of the first ribs 121 and the second ribs 122 are provided, and the plurality of first ribs 121 and second ribs 122 are arranged alternately. By providing a plurality of the first ribs 121 and the second ribs 122 and arranging them alternately, such a layout significantly enhances the stability and load-bearing capacity of the impact-resistant structure. The alternately arranged ribs form a more dense support network, which can effectively disperse and resist the pressure generated during the impact of the medium, preventing single-point overload and local damage. As Figure 3 shown, two first ribs 121 and two second ribs 122 are provided, and the first ribs 121 and the second ribs 122 are arranged alternately. The alternately arranged ribs also help to guide the fluid to be more evenly distributed inside the shell, reducing the possibility of the fluid directly impacting the heat exchange tube bundle, thereby improving the overall performance and service life of the heat exchanger. At the same time, the alternately arranged first ribs 121 and second ribs 122 can increase the diversion and drainage effect, effectively reducing the excessive dynamic head to an acceptable range.

[0025] Further, in other embodiments of this application, a conical plate 124 is also arranged between the first rib 121 and the second rib 122. The introduction of the conical plate 124 further strengthens the effect of the impact-resistant structure. The shape and angle design of the conical plate 124 help to guide the fluid flow, reduce the direct impact and turbulence of the fluid, and protect the heat exchange tubes from damage. The conical plate 124 can also play a role in shunting, guiding the fluid in different directions, and effectively reducing the noise and vibration at the inlet of the shell-side medium.

[0026] Furthermore, in other embodiments of the present application, the cone angle of the conical plate 124 is set to be 80-100°. The conical plate 124 within this angle range has better optimization of the fluid flow path and dispersion effect. By controlling the angle between the conical plates 124, the fluid can be more effectively guided, reducing the risk of the fluid directly impacting the heat exchange tubes. At the same time, this layout also helps to reduce the flow dead zone, ensuring that more heat exchange tubes can participate in the heat exchange process and improving the overall heat exchange efficiency.

[0027] Furthermore, in other embodiments of the present application, one end of the conical plate 124 is connected to the annular plate 123. Connecting one end of the conical plate 124 to the annular plate 123 not only enhances the stability of the overall structure but also enables the conical plate 124 to better cooperate with the ribs and the annular plate 123 to jointly resist the impact of the fluid. This connection method also helps to simplify the installation and disassembly process, facilitating later maintenance and repair.

[0028] Further, in other embodiments of the present application, both ends of the first rib 121 and the second rib 122 away from the heat exchange tubes in the heat exchanger are fixedly connected to the heat exchanger, for example, welding connection can be selected. By fixing one end of the ribs on the heat exchanger, the stability and reliability of the entire anti-impact structure are ensured. This connection method can withstand the huge force generated by the fluid impact, protecting the heat exchange tubes from damage. At the same time, the fixed ribs can also serve as a strengthening structure for the heat exchanger nozzle 100, enhancing the load-bearing capacity and service life of the entire heat exchanger.

[0029] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A new anti-impact structure for a shell and tube heat exchanger, characterized in that: The invention comprises a heat exchanger pipe (100), wherein a first rib (121) and a second rib (122) are arranged in the heat exchanger pipe (100) along the direction in which the medium enters; and further comprises a circular ring plate (123), wherein one end of the first rib (121) and the second rib (122) close to a heat exchange tube in the heat exchanger are connected to the circular ring plate (123).

2. The novel anti-impact structure of shell and tube heat exchanger according to claim 1 is characterized in that: A plurality of the first ribs (121) and the second ribs (122) are provided, and the plurality of first ribs (121) and the second ribs (122) are alternately arranged.

3. The novel anti-impact structure of shell and tube heat exchanger according to claim 1 or 2, characterized in that: A cone plate (124) is also provided between the first rib (121) and the second rib (122).

4. The novel anti-impact structure of shell and tube heat exchanger according to claim 3 is characterized in that: The cone angle of the cone plate (124) is set at 80-100 degrees.

5. The novel anti-impact structure of shell and tube heat exchanger according to claim 4 is characterized in that: One end of the cone plate (124) is connected to the annular plate (123).

6. The novel anti-impact structure of shell and tube heat exchanger according to claim 3 is characterized in that: One end of the cone plate (124) is connected to the annular plate (123).

7. The novel anti-impact structure of shell and tube heat exchanger according to claim 1, 2, 4 or 6, characterized in that: The ends of the first rib (121) and the second rib (122) away from the heat exchange tube in the heat exchanger are both fixedly connected to the heat exchanger connecting pipe.

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