Heat exchanger shell pass anti-impact structure and heat exchanger

Abstract

The utility model provides a heat exchanger shell pass anti-impact structure and a heat exchanger. The shell pass anti-impact structure of the heat exchanger comprises a first anti-impact plate and a second anti-impact plate, wherein the first impingement plate and the second impingement plate are sequentially arranged in the shell pass inlet at intervals, and a first air inlet and a second air inlet are formed in the first impingement plate and the second impingement plate respectively; in the axis direction of the shell pass inlet, the projection of the first impingement plate on the second impingement plate covers the second air inlet; according to the shell pass anti-impact structure of the heat exchanger, the shell pass internal pipe distribution space and the heat exchanger external pipeline connection space are not occupied, and the arrangement of the heat exchanger internal pipe distribution and the heat exchanger external pipeline is not affected. Meanwhile, the anti-scour structure of the heat exchanger tube shell can hinder and remove entrainment substances such as liquid drops in the material flow, the dryness of the material flow is increased, and the situation that the entrainment substances such as the liquid drops are separated out to cause damage such as abrasion and cavitation to a heat exchange tube or other internal parts at a shell pass inlet is avoided.

Description

Technical Field

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

[0002] A heat exchanger, also known as a heat exchanger, typically consists of two chambers: a tube-side chamber and a shell-side chamber. These chambers are separated by a structure such as heat transfer tubes. The tube-side material flows inside the heat transfer tubes, while the shell-side material flows outside the heat transfer tubes. Heat is exchanged through the heat transfer tubes. They are widely used in industries such as the nuclear industry and the petrochemical industry.

[0003] When the shell-side material flow directly enters the heat exchanger, it will cause an impact on the heat exchange tubes, and this impact may cause damage to the heat exchange tubes. The national standard "Heat Exchanger" stipulates that when the material flow is composed of abrasive gas, steam and gas-liquid mixture, an anti-impact plate or guide tube should be installed at the shell-side inlet. In order to avoid the damage to the heat exchange tubes caused by the impact of the above-mentioned material flow, the commonly used solution is to install anti-impact plates, anti-impact rods and other structures in the shell-side inlet area to reduce the impact and avoid corrosion of the heat exchange tubes. However, the existing anti-impact structures generally need to occupy the heat exchanger pipe layout space, or occupy the external space of the heat exchanger, which may affect the internal heat exchange tubes or external pipeline layout. Utility Model Content

[0004] In view of the above problems existing in the prior art, the utility model provides a heat exchanger shell-side anti-impact structure and a heat exchanger to improve the technical problem that the existing anti-impact structure generally needs to encroach on the heat exchanger pipe layout space or occupy the external space of the heat exchanger, which may affect the layout of the internal heat exchange tubes or external pipelines.

[0005] To achieve the above-mentioned purpose and other related purposes, the present invention provides, on the one hand, a shell-side anti-collision structure of a heat exchanger, which includes a first anti-collision plate and a second anti-collision plate; the first anti-collision plate is arranged in the shell-side inlet, and a first air inlet is provided on the first anti-collision plate; the second anti-collision plate is arranged in the shell-side inlet and is spaced apart from the first anti-collision plate, and a second air inlet is provided on the second anti-collision plate; along the axial direction of the shell-side inlet, the projection of the first anti-collision plate on the second anti-collision plate covers the second air inlet; along the axial direction of the shell-side inlet, the projection of the second anti-collision plate on the first anti-collision plate covers the first air inlet.

[0006] In one embodiment of the shell-side anti-collision structure of the heat exchanger of the present invention, the first anti-collision plate includes two first fan-shaped plates arranged relatively symmetrically, the arc edges of the two first fan-shaped plates are fixedly connected to the inner side wall of the shell-side inlet, and the two first fan-shaped plates and the shell-side inlet form the first air inlet.

[0007] In one embodiment of the shell-side anti-impact structure of the heat exchanger of the present invention, the curvature range of a single group of the first sector plates is 90°-120°.

[0008] In one embodiment of the shell-side anti-collision structure of the heat exchanger of the present invention, the second anti-collision plate has the same structure as the first anti-collision plate and is arranged in an interlaced manner relative to the first anti-collision plate.

[0009] In one embodiment of the shell-side anti-impact structure of the heat exchanger of the present invention, the first anti-impact plate and the second anti-impact plate are respectively welded to the inner side wall of the shell-side inlet.

[0010] In one embodiment of the shell-side anti-impact structure of the heat exchanger of the present invention, the first anti-impact plate and the second anti-impact plate are made of stainless steel plates.

[0011] In one embodiment of the shell-side anti-impact structure of the heat exchanger of the present invention, the second anti-impact plate is located below the first anti-impact plate, and the second anti-impact plate is located at the gas outlet end of the shell-side inlet.

[0012] In one embodiment of the shell-side anti-impact structure of the heat exchanger of the present invention, the number of the first air inlet and the second air inlet is not less than two groups.

[0013] In one embodiment of the shell-side anti-collision structure of the heat exchanger of the present invention, it also includes a third anti-collision plate, which is arranged at the air inlet end away from the shell-side inlet and is spaced apart from the second anti-collision plate. A third air inlet is opened on the third anti-collision plate; along the axial direction of the shell-side inlet, the projection of the third anti-collision plate on the second anti-collision plate covers the second air inlet.

[0014] In one embodiment of the shell-side anti-impact structure of the heat exchanger of the present invention, the first anti-impact plate, the second anti-impact plate and the third anti-impact plate have the same structure and are sequentially arranged at intervals in the shell-side inlet.

[0015] In one embodiment of the shell-side anti-impact structure of the heat exchanger of the present invention, the third anti-impact plate is provided at the gas outlet end of the shell-side inlet.

[0016] On the other hand, the present invention further provides a heat exchanger, which includes a shell-side inlet and the heat exchanger shell-side anti-impact structure described in any one of the above items; the heat exchanger shell-side anti-impact structure is arranged in the shell-side inlet.

[0017] The shell-side anti-collision structure and heat exchanger of the present invention provide a first anti-collision plate and a second anti-collision plate within the pipe at the shell-side inlet to buffer the material flow entering the shell-side from the shell-side inlet, thereby reducing direct impact on the heat exchange tubes and minimizing damage to the heat exchange tubes. Furthermore, the structure does not occupy internal piping space in the shell-side or external space in the heat exchanger, and the internal and external piping arrangements of the heat exchanger are not affected. Furthermore, the shell-side anti-collision structure can remove droplets and other entrained materials from the material flow, thereby increasing the dryness of the material flow and preventing the precipitation of droplets and other entrained materials from causing damage such as abrasion and cavitation to the heat exchange tubes at the shell-side inlet or other parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a structural diagram of an embodiment of the shell-side anti-shock structure of a heat exchanger of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the first anti-collision plate in an embodiment of the shell-side anti-collision structure of the heat exchanger of the present invention;

[0021] Figure 3 This is a top view of the second anti-collision plate structure in an embodiment of the shell-side anti-collision structure of the heat exchanger of the present invention;

[0022] Figure 4 This is a schematic diagram of the third anti-collision plate and its installation in an embodiment of the shell-side anti-collision structure of the heat exchanger of the present invention;

[0023] Figure 5 This is a cross-sectional view of the third anti-collision plate and its installation in an embodiment of the shell-side anti-collision structure of the heat exchanger of the present invention.

[0024] Component number description:

[0025] 100, shell side inlet; 200, first anti-collision plate; 210, first sector plate; 300, second anti-collision plate; 310, second sector plate; 400, first air inlet; 500, second air inlet; 600, third anti-collision plate; 700, third air inlet. DETAILED DESCRIPTION

[0026] The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation methods. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following examples and the features in the examples can be combined with each other unless there is a conflict. It should also be understood that the terms used in the examples of the present invention are for the purpose of describing specific implementation methods, not for the purpose of limiting the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are generally carried out under conventional conditions or under the conditions recommended by the manufacturers.

[0027] When numerical ranges are given in the examples, it should be understood that unless otherwise specified herein, both endpoints of each numerical range and any value between the endpoints may be used. Unless otherwise defined, all technical and scientific terms used in this utility model are consistent with the prior art as understood by those skilled in the art and the description of this utility model. Any prior art methods, equipment, and materials similar or equivalent to those in the examples of this utility model may also be used to implement this utility model.

[0028] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0029] See also Figures 1 to 5 In order to improve the technical problem that the existing anti-collision structure generally needs to occupy the pipe layout space of the heat exchanger, or occupy the external space of the heat exchanger, which may affect the layout of the internal heat exchange tubes or external pipelines, the utility model provides a heat exchanger shell-side anti-collision structure and a heat exchanger. The heat exchanger shell-side anti-collision structure is arranged in the nozzle inlet of the heat exchanger, does not occupy the internal space of the heat exchange tube or the external space of the heat exchanger, and realizes the shielding and separation of the material flow and the deflection, compression and expansion of the fluid.

[0030] In order to achieve the above-mentioned purpose and other related purposes, the present invention provides a shell-side anti-collision structure for a heat exchanger. Different from the existing scheme in which the anti-collision plate is arranged in the shell side of the heat exchanger to occupy the layout space of the heat exchange tube, the anti-collision structure of the present scheme is arranged in the shell-side inlet 100 of the heat exchanger, that is, in the pipe cavity at the nozzle inlet of the heat exchanger. The fixing method of the anti-collision structure in the shell-side inlet 100 is not limited. It can be any suitable type of structure that fixes the anti-collision structure to the inner cavity of the shell-side inlet 100 and has a certain impact resistance; for example, it can be a welding connection, an embedded clamping connection or a bolt connection; the shell-side anti-collision structure of the heat exchanger includes a first anti-collision plate 200 and a second anti-collision plate 300; the first anti-collision plate 200 and the second anti-collision plate 300 are arranged along the shell-side inlet 1 00 is fixedly connected to the inner side wall of the shell inlet 100 in the axial direction in sequence; a first air inlet 400 is provided on the first anti-collision plate 200; the first opening 400 can be set on the plate surface of the first anti-collision plate 200, or it can be a gap area formed between the first anti-collision plate 200 and the inner side wall of the shell inlet 100, for the circulation of material flow; the second anti-collision plate 300 is arranged in the shell inlet 100, and is spaced apart from the first anti-collision plate 200, and a second air inlet 500 is provided on the second anti-collision plate 300; the second opening 500 can be set on the plate surface of the second anti-collision plate 300, or it can be a gap area formed between the second anti-collision plate 300 and the inner side wall of the shell inlet 100, for the circulation of materials into the shell side of the heat exchanger.

[0031] When the first anti-collision plate 200 is projected along the axial direction of the shell-side inlet 100, the projection area of ​​the first anti-collision plate 200 on the second anti-collision plate 300 covers the second air inlet 500, that is, the axial projection of the first air inlet 400 is located on the plate surface of the second anti-collision plate 300; similarly, when the second anti-collision plate 300 is projected along the axial direction of the shell-side inlet 100, the projection area of ​​the second anti-collision plate 300 on the first anti-collision plate 200 covers the first air inlet 400, that is, the axial projection of the second air inlet 500 is located on the plate surface of the first anti-collision plate 300; thereby forming a staggered arrangement of the first air inlet 400 and the second air inlet 500. If there is an overlapping area between the first air inlet 300 and the second air inlet 400 in the axial direction, a direct gas passage will be formed, the material flow will not be deflected and the flow will be increased.

[0032] The first air inlet 400 and the second air inlet 500 are staggered, and the first and second baffles 200 and 300 are spaced apart. When the external material flow enters through the shell-side inlet 100, a portion of the material flow impacts the first baffle 200; the other portion of the material flows through the first air inlet 400 and impacts the second baffle 300. During the process of the material flow impacting the first baffle 200, some entrained matter and droplets are blocked by the first baffle 200. At the same time, because the flow area is reduced, the material flow velocity increases, thereby increasing the material flow rate. When the material flow passes through the first baffle plate 200 and reaches the second baffle plate 300, the entrained matter (compared to gas molecules) in the material flow passing through the first air inlet 400 has greater momentum and is relatively difficult to change direction. Most of it is blocked and slowed down by the second baffle plate 300, thereby reducing subsequent cavitation or abrasion damage to the heat exchange tubes. The gas in the material passing through the first air inlet 400 has relatively small momentum and is rapidly deflected in the direction behind the flow area, flowing through the second air inlet 500. During this process, the deflection in direction and the change in the cross-section of the plate flow area cause the material flow to compress and increase pressure. With the increase in pressure, saturated gas and steam may slightly liquefy.

[0033] The material flow passes through the second air inlet 500 and flows into the shell side of the heat exchanger. This process increases the flow cross-section and reduces the material flow pressure. This lower pressure causes saturated gas and vapor to move away from the saturation point, leading to flash evaporation and other phenomena. This increases the dryness of the material flow and reduces cavitation damage to the heat exchange tubes. Furthermore, because the first and second baffles 200 and 300 shield the material flow during this process, entrained materials and droplets are blocked or removed by flash evaporation, minimizing damage to the heat exchange tubes.

[0034] Among them, the shape of the first air inlet 400 or the second air inlet 500 is not limited, for example, it can be a strip hole, a circular hole or a circular hole, etc., as long as it is any suitable type of shape that can realize the staggered setting of the first air inlet 400 and the second air inlet 500 and cooperate with the anti-collision plate to realize the functions of blocking, separating, deflecting, compressing, and expanding the material flow; at the same time, in order to ensure the uniformity of the supply and circulation of the material flow, in one embodiment of the shell-side anti-collision structure of the heat exchanger of the present invention, the number of the first air inlet 400 and the second air inlet 500 is not less than two groups, and the first air inlet 400 and the second air inlet 500 are evenly distributed on the first anti-collision plate 200 and the second anti-collision plate 300 respectively.

[0035] Since the shell-side inlet 100 is generally a tubular structure, in order to form a plurality of staggered arrangements of the first air inlet 400 and the second air inlet 500, the first anti-collision plate 200 can be composed of a plurality of fan-shaped plates arranged in an annular array, with adjacent fan-shaped plates forming a plurality of fan-shaped first air inlets 400 between the adjacent fan-shaped plates and the inner sidewall of the shell-side inlet 100. For example, in one embodiment of the shell-side anti-collision structure of the heat exchanger of the present invention, the first anti-collision plate 200 includes two relatively symmetrically arranged first fan-shaped plates 210. The two first fan-shaped plates 210 are an integral structure, and the arc edges of the two first fan-shaped plates 210 are fixedly connected to the inner sidewall of the shell-side inlet 100. The two first fan-shaped plates 210 and the inner sidewall of the shell-side inlet 100 form two sets of first air inlets 400 that are symmetrical along the axis of the shell-side inlet 100. Furthermore, the curvature of a single set of first fan-shaped plates 210 is designed to be any angle between 90° and 120° to ensure sufficient airflow area.

[0036] See also Figures 2 to 3 In one embodiment of the shell-side anti-collision structure of a heat exchanger according to the present invention, the second anti-collision plate 300 has the same structure as the first anti-collision plate 200 and is arranged in an interlaced manner relative to the first anti-collision plate 200. Specifically, the second anti-collision plate 300 includes two relatively symmetrically arranged second sector plates 310. The two second sector plates 310 form an integral structure, and the arc edges of the two second sector plates 310 are fixedly connected to the inner side wall of the shell-side inlet 100. The two second sector plates 210 and the inner side wall of the shell-side inlet 100 form two sets of second air inlets 500 that are relatively symmetrical along the axis of the shell-side inlet 100. Furthermore, the curvature of the single second sector plate 210 is designed to be anywhere from 90° to 120° to ensure sufficient airflow area while ensuring the staggered arrangement of the first air inlet 400 and the second air inlet 500.

[0037] See also Figure 1 In one embodiment of the shell-side anti-collision structure of the heat exchanger of the present invention, the first anti-collision plate 200 and the second anti-collision plate 300 are respectively welded to the inner wall of the shell-side inlet 100. Specifically, the arc edge of the first fan-shaped plate 210 is welded to the inner wall of the shell-side inlet 100, and the arc edge of the second fan-shaped plate 320 is welded to the inner wall of the shell-side inlet 100. The welded connection can ensure the firmness of the connection between the shell-side anti-collision structure of the heat exchanger and the heat exchanger. At the same time, due to the fan-shaped structure design of the first anti-collision plate 200 and the second anti-collision plate 300, it is flexible and has a simple and compact structure. It can be pre-installed during the production of the heat exchanger or installed by itself during the actual construction process later.

[0038] The material of the first anti-collision plate 200 and the second anti-collision plate 300 is not limited, and can be an aluminum plate, a cast iron plate, a steel plate or a stainless steel plate. It can be selected based on multiple factors such as whether the material flow is corrosive and the temperature. In one embodiment of the shell-side anti-collision structure of the heat exchanger of the present invention, in order to increase the durability and versatility of the first anti-collision plate 200 and the second anti-collision plate 300, the first anti-collision plate 200 and the second anti-collision plate 300 of this embodiment are made of stainless steel plates.

[0039] See also Figure 1 In one embodiment of the shell-side anti-collision structure of the heat exchanger of the present invention, the second anti-collision plate 300 is located below the first anti-collision plate 200 and at the outlet end of the shell-side inlet 100. Specifically, the first anti-collision plate 200 and the second anti-collision plate 300 are arranged sequentially along the flow direction of the material at the shell-side inlet 100. The second anti-collision plate 300 is preferably located near the end of the shell-side inlet 100 where it communicates with the shell-side inner cavity. When the material flow flows through the second air inlet 500 of the second anti-collision plate 300, the material flow pressure decreases due to the increase in the flow cross-section. The low pressure causes the saturated gas and vapor to move away from the saturation point, resulting in phenomena such as flash evaporation.

[0040] See also Figures 4 and 5 In one embodiment of the shell-side anti-collision structure of a heat exchanger according to the present invention, the shell-side anti-collision structure is not limited to two sets of anti-collision plates. A third or fourth set of anti-collision plates can be flexibly provided according to design requirements. For example, in this embodiment, the shell-side anti-collision structure further includes a third anti-collision plate 600. The third anti-collision plate 600 is disposed at the air inlet end away from the shell-side inlet 100 and spaced apart from the second anti-collision plate 300. A third air inlet 700 is defined on the third anti-collision plate 600. Along the axis of the shell-side inlet 100, the projection of the third anti-collision plate 600 on the second anti-collision plate 300 covers the second air inlet 500. Similarly, when the material flow flows from the second anti-collision plate 300 to the third anti-collision plate 600, the material flow is compressed in the area between the second and third anti-collision plates 300 due to directional deflection and changes in the cross-sectional area of ​​the flow, resulting in increased pressure. As the pressure increases, the saturated gas and steam may undergo a slight liquefaction process. During this process, the liquefied liquid droplets between the first and second anti-impact plates 200 and 300 are blocked by the third anti-impact plate 600 .

[0041] Furthermore, in order to ensure the uniformity of gas distribution, in one embodiment of the shell-side anti-collision structure of the heat exchanger of the present invention, the first anti-collision plate 200, the second anti-collision plate 300 and the third anti-collision plate 600 have the same structure and are arranged in sequence at intervals in the shell-side inlet 100. Specifically, the structure, material and connection method of the third anti-collision plate 600 are consistent with the fan-shaped structure of the first anti-collision plate 200 described in the above embodiment, and will not be repeated here. Similarly, when the third anti-collision plate 600 is present, the third anti-collision plate 600 replaces the second anti-collision plate 300 and is arranged at the gas outlet end of the shell-side inlet 100 to cause the droplets to form a flash evaporation phenomenon.

[0042] On the other hand, the present invention further provides a heat exchanger, which includes a shell-side inlet 100 and the heat exchanger shell-side anti-impact structure described in any of the above embodiments; the heat exchanger shell-side anti-impact structure is arranged in the shell-side inlet 100. It should be noted that the heat exchanger can also include components other than the heat exchanger shell-side anti-impact structure of the present invention, such as a shell, a heat exchange tube, a shell-side outlet, a tube-side inlet, a tube-side outlet and other conventional components of an existing heat exchanger, which will not be repeated here.

[0043] In the heat exchanger shell-side anti-collision structure and heat exchanger of the present invention, by arranging a first anti-collision plate and a second anti-collision plate in the pipe at the shell-side inlet, the material flow entering the shell from the shell-side inlet is buffered, the direct impact on the heat exchange tube is reduced, and the damage to the heat exchange tube is reduced. It does not occupy the internal piping space of the shell side, nor does it occupy the external space of the heat exchanger. The internal piping and external piping layout of the heat exchanger are not affected. At the same time, the heat exchanger shell-side anti-collision structure can remove droplets and other entrained materials in the material flow, increase the dryness of the material flow, and avoid the precipitation of droplets and other entrained materials causing damage such as abrasion and cavitation to the heat exchange tube at the shell-side inlet or other parts. The existing anti-collision structure generally needs to occupy the heat exchanger piping space or the external space of the heat exchanger, which may affect the technical problem of the layout of the internal heat exchange tube or the external pipe. Therefore, the utility model effectively overcomes some practical problems in the existing technology and has high utilization value and use significance.

[0044] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A heat exchanger shell side anti-impact structure, characterized in that: include: a first anti-collision plate, the first anti-collision plate being arranged in the shell-side inlet and having a first air inlet; a second anti-collision plate, the second anti-collision plate being arranged in the shell-side inlet and spaced apart from the first anti-collision plate, and having a second air inlet formed on the second anti-collision plate; Along the axial direction of the shell-side inlet, the projection of the first anti-impact plate on the second anti-impact plate covers the second air inlet; Along the axial direction of the shell-side inlet, the projection of the second impact plate on the first impact plate covers the first air inlet.

2. The shell-side anti-impact structure of the heat exchanger according to claim 1, characterized in that: The first anti-collision plate includes two first sector plates arranged relatively symmetrically, the arc edges of the two first sector plates are fixedly connected to the inner side wall of the shell-side inlet, and the two first sector plates and the shell-side inlet form the first air inlet.

3. The shell-side anti-impact structure of the heat exchanger according to claim 2, characterized in that: The curvature range of a single group of the first sector plates is 90°-120°.

4. The shell-side anti-impact structure of the heat exchanger according to claim 2 or 3, characterized in that: The second anti-collision plate has the same structure as the first anti-collision plate and is arranged in an interlaced manner relative to the first anti-collision plate.

5. The shell-side anti-impact structure of the heat exchanger according to claim 4, characterized in that: The first anti-impact plate and the second anti-impact plate are respectively welded to the inner side wall of the shell side inlet.

6. The shell-side anti-impact structure of the heat exchanger according to claim 1, characterized in that: The first anti-collision plate and the second anti-collision plate are made of stainless steel plates.

7. The shell-side anti-impact structure of the heat exchanger according to claim 1, characterized in that: The second anti-impact plate is located at the lower part of the first anti-impact plate, and the second anti-impact plate is located at the gas outlet end of the shell side inlet.

8. The shell-side anti-impact structure of the heat exchanger according to claim 1, characterized in that: The number of the first air inlets and the second air inlets is not less than two groups.

9. The shell-side anti-impact structure of the heat exchanger according to claim 1, characterized in that: It also includes a third anti-collision plate, which is arranged at the air inlet end away from the shell-side inlet and is spaced apart from the second anti-collision plate. A third air inlet is opened on the third anti-collision plate; along the axial direction of the shell-side inlet, the projection of the third anti-collision plate on the second anti-collision plate covers the second air inlet.

10. The shell-side anti-impact structure of a heat exchanger according to claim 9, characterized in that: The first anti-impact plate, the second anti-impact plate and the third anti-impact plate have the same structure and are sequentially arranged at intervals in the shell side inlet.

11. The shell-side anti-impact structure of the heat exchanger according to claim 10, characterized in that: The third anti-impact plate is arranged at the gas outlet end of the shell side inlet.

12. A heat exchanger, characterized in that: A heat exchanger shell-side anti-impact structure comprising a shell-side inlet and any one of claims 1 to 11; The shell-side anti-impact structure of the heat exchanger is arranged in the shell-side inlet.

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