A shell-and-tube heat exchanger for two-phase flow in a porous medium

Abstract

The application provides a multi-hole medium two-phase flow shell-and-tube heat exchanger, and relates to the field of heat exchangers.The application comprises a shell with an inner cavity for the flow of a first medium; a heat exchange tube arranged in the shell for the flow of a second medium; and a flow baffle arranged in the shell; wherein the flow baffle comprises a body and a sub-baffle, the sub-baffle is movably arranged in the shell to switch the flow baffle between a first state and a second state, when the flow baffle is in the first state, the flow baffle and the inner wall of the shell jointly define a first channel for the flow of the first medium; when the flow baffle is in the second state, the flow baffle and the inner wall of the shell jointly define a second channel for the flow of the first medium, the flow paths of the first channel and the second channel are different, which is beneficial to reduce the accumulation of dirt, deposits or scale, thereby making the heat exchange process more stable, and prolonging the heat exchange efficiency and service life of the shell-and-tube heat exchanger to a certain extent.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger technology, and more particularly to a porous medium two-phase flow shell-and-tube heat exchanger. Background Technology

[0002] Shell-and-tube heat exchangers are common heat exchange equipment widely used in chemical, energy, power, and metallurgical industries. Their basic structure includes a shell, tube bundles, and end tube boxes. During heat exchange, one fluid flows in the tube side, and the other flows in the shell side, exchanging heat through the tube walls. Due to their compact structure, large heat transfer area, and wide applicability, shell-and-tube heat exchangers are widely used in various industrial applications.

[0003] However, in related technologies, the flow of fluid in the shell side of a shell-and-tube heat exchanger is not completely uniform, and there are often areas with poor flow, known as "dead zones." Due to the low fluid velocity in these dead zones, they often become areas where dirt, deposits, or scale tend to accumulate, thus affecting the heat exchange efficiency and service life of the shell-and-tube heat exchanger. Summary of the Invention

[0004] To address the aforementioned problems, this application provides a porous medium two-phase flow shell-and-tube heat exchanger.

[0005] This application provides a porous medium two-phase flow shell-and-tube heat exchanger, employing the following technical solution:

[0006] A porous medium two-phase flow shell-and-tube heat exchanger, comprising:

[0007] The housing has an internal cavity for the flow of a first medium;

[0008] A heat exchange tube is disposed inside the housing for supplying the flow of the second medium;

[0009] A baffle plate is disposed inside the housing;

[0010] The baffle plate includes a main body and a sub-plate, and the sub-plate is movably disposed within the housing so that the baffle plate switches between a first state and a second state.

[0011] When the baffle is in the first state, the baffle and the inner wall of the housing together define a first channel for the first medium to flow through.

[0012] When the baffle is in the second state, the baffle and the inner wall of the housing together define a second channel for the first medium to flow through, and the flow paths of the first channel and the second channel are different.

[0013] Preferably, the heat exchange tube includes a first tube bundle connected to the sub-plate, the first tube bundle being fixedly connected to the sub-plate and slidably disposed within the housing;

[0014] When the baffle plate switches between the first state and the second state, the first tube bundle can slide relative to the housing.

[0015] Preferably, the subplate is elastically connected to the first tube bundle.

[0016] Preferably, the sub-plate includes a skeleton and an elastomer covering the skeleton;

[0017] The first tube bundle includes multiple first tubes;

[0018] The frame is provided with a through hole for the first pipe to pass through, and the diameter of the through hole is larger than the diameter of the first pipe.

[0019] The elastomer fills the gap between the first pipe and the through hole and is fixedly connected to the first pipe.

[0020] Preferably, the subplate is configured such that, after being connected to the first tube bundle, the plane containing the subplate forms an acute angle with the axial direction of the first tube bundle under the action of the elastomer.

[0021] Preferably, the elastomer has a first hole and a second hole that are interconnected;

[0022] The first pipe fitting passes through the first hole and the second hole, and is fixedly connected to the inner walls of the first hole and the second hole;

[0023] The central axis of the first hole intersects or is parallel to the central axis of the second hole;

[0024] The subplate is configured such that, when connected to the first pipe fitting, the elastomer can undergo elastic deformation, so that the first pipe fitting passes through the first hole, the second hole, and the through hole.

[0025] Preferably, the central axes of the first hole and the second hole are parallel to each other, and the central axis of the through hole coincides with the central axis of the first hole or the second hole.

[0026] Preferably, a buffer cavity is provided in the elastic body at the contact point between the sub-plate and the inner wall of the shell;

[0027] At least a plurality of flexible limiting ropes are provided in the elastic body surrounding the buffer cavity;

[0028] The flexible limiting rope is used to limit the deformation range of the elastic body when the elastic body around the buffer cavity deforms.

[0029] Preferably, the heat exchange tube further includes a second tube bundle connected to the body;

[0030] The main body is elastically connected to the second tube bundle;

[0031] A magnetic adsorption element is provided between the main body and the sub-plate, which is used to make the main body and the sub-plate adsorb each other when the sub-plate is close to the main body;

[0032] The body is configured to move relative to the second tube bundle when subjected to an external force, such that the angle between the plane on which the body is located and the second tube bundle is an acute angle.

[0033] Preferably, the sub-plate includes two sets, one set disposed on the first side of the body and the other set disposed on the second side of the body;

[0034] When one set of the sub-plates comes into contact with the body, the other set of the sub-plates separates from the body.

[0035] The present invention has the following advantages and beneficial effects:

[0036] This application incorporates a movable sub-plate, allowing the baffle to define a first channel in a first state, along which the first medium flows for heat exchange. In a second state, the baffle defines a second channel with a different flow path than the first channel, along which the first medium flows. Because the flow paths of the first and second channels differ, switching the baffle's state alters the distribution of fluid flow within the shell, transforming dead zones formed in the first state into flow areas in the second state, and vice versa. This periodic change in flow path helps flush away areas prone to fouling, deposits, or scale buildup, reducing accumulation and thus stabilizing the heat exchange process. It also extends the heat exchange efficiency and lifespan of the shell-and-tube heat exchanger to some extent.

[0037] Furthermore, the sub-plate can guide and direct the first medium to a certain extent. That is, when the first medium flows through the shell, its flow direction can be affected by the inclination angle of the sub-plate plane, thus forming a predetermined flow path. The inclined sub-plate also makes the angle between the first medium and the sub-plate surface acute, which is beneficial for the first medium to exert a certain scouring effect on the sub-plate surface. During this process, due to the scouring effect of the first medium on the surface, the tendency for dirt, deposits, or scale to accumulate on the sub-plate surface can be reduced to a certain extent, thereby helping to maintain the heat exchange efficiency between the heat exchange tube bundle and the medium inside the shell. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the structure of the baffle in the first state in the embodiment of this application;

[0040] Figure 2 This is a schematic diagram of the baffle plate in the second state in an embodiment of this application;

[0041] Figure 3 This is a schematic diagram of the first structure of the baffle in the embodiments of this application;

[0042] Figure 4 This is a schematic diagram of the second structure of the baffle in the embodiments of this application;

[0043] Figure 5 This is a first front view of the baffle in the embodiments of this application;

[0044] Figure 6 This is a second front view of the baffle in the embodiments of this application;

[0045] Figure 7 This is a partial structural diagram of the sub-board in an embodiment of this application;

[0046] Figure 8 This is a schematic diagram of the structure when the subplate and the first pipe fitting are engaged in an embodiment of this application;

[0047] Figure 9 This is another structural schematic diagram of the baffle plate in the second state in the embodiments of this application.

[0048] The diagram is marked as follows:

[0049] 100. Shell; 110. Inner cavity; 111. First channel; 112. Second channel; 200. Heat exchange tube; 210. First tube bundle; 211. First tube fitting; 220. Second tube bundle; 300. Baffle plate; 310. Body; 320. Sub-plate; 321. Frame; 321a. Through hole; 322. Elastomer; 322a. First hole; 322b. Second hole; 322c. Buffer cavity; 322d. Flexible limiting rope; 400. Magnetic adsorption component; 500. End plate; 510. First heat exchange cavity; 511. First cavity; 512. Second cavity; 520. Second heat exchange cavity; 600. Corrugated cover; 610. Sealed space. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0051] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0052] Reference Figures 1 to 9 As shown in the figure, this application provides a porous medium two-phase flow shell-and-tube heat exchanger, including a shell 100, heat exchange tubes 200, and baffles 300. The shell 100 has an inner cavity 110 for supplying a first medium, and the heat exchange tubes 200 are disposed inside the shell 100 for supplying a second medium. By introducing media of different temperatures into the shell 100 and the heat exchange tubes 200 respectively, heat exchange between the two media can be achieved to cool the medium with the higher temperature.

[0053] In some embodiments, a high-temperature medium flows into the shell 100, and a low-temperature medium flows into the heat exchange tube 200. When the high-temperature medium flows in the inner cavity 110 of the shell 100, it can transfer heat with the low-temperature medium flowing in the heat exchange tube 200 through the tube wall. Due to the temperature difference between the two, heat will be transferred along the surface of the heat exchange tube 200, causing the high-temperature medium to gradually cool down during the flow, while the low-temperature medium absorbs heat accordingly.

[0054] The housing 100 is a metal structure with an internal cavity 110 for the flow of a first medium. The housing 100 has an inlet and an outlet communicating with the internal cavity 110. For example, the housing 100 has one inlet and one outlet. The inlet is located at the upper part of the housing 100 and near one end of the housing 100, while the outlet is located at the bottom of the housing 100 and near the other end of the housing 100, so that after the first medium enters the internal cavity 110, it flows along the interior of the housing 100 and eventually exits from the outlet.

[0055] In some embodiments, refer to Figure 1 and Figure 2 The heat exchange tubes 200 are disposed within the shell 100 for supplying the flow of the second medium. The heat exchange tubes 200 can be arranged in parallel, inclined, or curved configurations. Different arrangements will affect the flow pattern of the first medium within the shell 100 and the heat exchange efficiency between the two media to some extent. For example, the heat exchange tubes 200 can be bundled together, allowing the first medium to flow around the heat exchange tubes 200 as it flows within the inner cavity 110 of the shell 100, thereby exchanging heat with the second medium flowing within the heat exchange tubes 200 through the walls of the heat exchange tubes 200.

[0056] In one alternative, the heat exchange tube 200 can be a straight tube for ease of processing and assembly. Furthermore, the material of the heat exchange tube 200 is typically a metallic material with good thermal conductivity and corrosion resistance, such as copper, aluminum, or stainless steel, to improve heat exchange performance and extend service life to some extent. It should be noted that "for supplying a second medium" is not limited to liquid media; gaseous media can also flow through the heat exchange tube 200 to achieve heat transfer with the medium inside the shell 100.

[0057] Through the above structural design, a two-fluid heat exchange relationship is formed between the heat exchange tube 200 and the shell 100, so that the first medium in the shell 100 can gradually exchange energy with the second medium in the heat exchange tube 200 during the flow process, thereby achieving the purpose of regulating the fluid temperature.

[0058] It is understood that a support member (not shown in the figure) is provided inside the housing 100 to support the heat exchange tube 200 within the housing 100. The support member helps to fix the position of the heat exchange tube 200 to a certain extent, ensuring a stable arrangement during the flow of the first medium, thus contributing to maintaining heat exchange efficiency.

[0059] During use, the heat exchange tube 200 is subjected to the combined effects of its own weight and fluid impact. Without a supporting structure, it may shift or bend due to gravity or fluid disturbance. By installing support components, significant deformation of the heat exchange tube 200 due to uneven stress can be avoided during long-term operation, thus helping to extend its service life.

[0060] For example, the support member can be a perforated plate structure with multiple holes and several open positions. Each hole is for a heat exchange tube 200 to pass through, and the open positions are for the flow of the first medium. The support member is welded to a portion of the heat exchange tube 200. In this way, the heat exchange tube 200 can maintain a relatively stable arrangement.

[0061] In some embodiments, refer to Figure 1 and Figure 2A baffle 300 is disposed within the housing 100. The baffle 300 is used to guide the flow direction of the first medium. Due to the presence of the baffle 300, the first medium does not flow along a straight path within the cavity 110 of the housing 100, but is forced to flow around it, thereby forming a specific flow trajectory within the housing 100. For example, the baffle 300 enables the first medium to flow along an approximately S-shaped path within the housing 100.

[0062] By altering this flow trajectory, the first medium can increase its contact area with the surface of the heat exchange tube 200 and extend its flow path within the shell 100, thereby enhancing the heat transfer between the first medium and the second medium within the heat exchange tube 200. Simultaneously, due to the longer flow path, the residence time of the first medium within the shell 100 increases accordingly, further improving the adequacy of heat transfer.

[0063] It should be noted that the specific shape and arrangement of the baffle 300 are not limited to the S-shaped flow described above. The baffle 300 can be a flat plate, an arc-shaped plate, or a multi-plate structure, and the specific number and position can be adjusted according to the size of the shell 100 and the heat exchange requirements. Different arrangements can form different flow trajectories to a certain extent, such as Z-shaped, spiral, or approximately straight paths with local deflection, thereby adapting to different operating conditions.

[0064] In some embodiments, refer to Figure 2 and Figure 3 The baffle 300 includes a body 310 and a sub-plate 320. The sub-plate 320 is movably disposed within the housing 100 to allow the baffle 300 to switch between a first state and a second state. In the first state, the baffle 300 and the inner wall of the housing 100 together define a first channel 111 for the flow of a first medium. In the second state, the baffle 300 and the inner wall of the housing 100 together define a second channel 112 for the flow of the first medium, and the flow paths of the first channel 111 and the second channel 112 are different.

[0065] With this structural design, the flow trajectory of the first medium within the housing 100 can be adjusted according to different states of the baffle 300. When the baffle 300 is in the first state, the first medium flows along the first channel 111, and some areas within the housing 100 may form regions with low flow velocity. When the baffle 300 switches to the second state, the first medium flows along the second channel 112, and the aforementioned regions with low flow velocity are transformed into flow areas to a certain extent, thereby changing the position of the dead zone within the housing 100.

[0066] This switching method allows for the periodic alteration of the flow path of the first medium during the operation of the casing 100. This enables areas prone to deposits or scale buildup under different conditions to be flushed away by subsequent fluids to a certain extent, thus preventing long-term fouling. This, in turn, improves the flow uniformity within the casing 100, enhancing heat exchange efficiency and extending the device's service life.

[0067] It should be further noted that the movement of the sub-plate 320 is not limited to linear reciprocating motion, but can also be rotation, oscillation or elastic deformation; the connection between the main body 310 and the sub-plate 320 can also be mechanical connection, elastic connection or magnetic connection, and the specific implementation method can be selected according to the actual working conditions.

[0068] For example, the body 310 is provided with a notch, which the first medium needs to pass through to achieve a change of direction when flowing within the housing 100. The sub-plate 320 is movably disposed within the housing 100, and when the sub-plate 320 is in different positions, it can selectively block part of the notch and open a new notch. In this way, the position of the notch changes with the movement of the sub-plate 320, thereby guiding the first medium to flow along different flow paths.

[0069] For example, the main body 310 has a first notch at one end and a second notch at the other end. When the sub-plate 320 moves to the baffle 300 in the first state, the sub-plate 320 blocks the second notch while keeping the first notch open. At this time, the first medium enters or flows out through the first notch, thus flowing along the first flow path. When the sub-plate 320 moves to the baffle 300 in the second state, the sub-plate 320 blocks the first notch and opens the second notch. At this time, the first medium enters or flows out through the second notch, thus flowing along a second flow path different from the first state.

[0070] Therefore, by selectively blocking the notch in different states, the flow path of the first medium within the shell 100 can be switched to a certain extent, causing the flow trajectory within the same shell 100 to change under different states. This design can periodically change the position of the flow dead zone, which is beneficial for flushing areas that are prone to fouling, thereby reducing the accumulation of deposits and having a positive effect on improving the overall heat exchange performance of the heat exchanger.

[0071] It should be further explained that the shape and size of the notch can be adjusted according to the actual flow requirements and the size of the housing 100. It can be a rectangular opening, an arc opening or other irregular opening, and the position of the notch is not limited to the two ends of the body 310. It can also be set on the side of the body 310 to adapt to different flow organization methods.

[0072] It should be understood that, in order for the sub-plate 320 to move relative to the housing 100, a driving device may be provided within the housing 100. This driving device is used to drive the sub-plate 320 to move. For example, the driving device can drive the sub-plate 320 to slide in a straight line, thereby enabling the sub-plate 320 to switch between different positions. The driving device can take many forms, such as a motor, cylinder, or electric actuator. These devices can provide a stable driving force to a certain extent, facilitating precise movement of the sub-plate 320.

[0073] In some embodiments, refer to Figure 3 and Figure 4 A single body 310 can correspond to multiple sub-plates 320 to form various flow path switching modes. Correspondingly, the number of driving devices can also be multiple, and each driving device can independently drive the corresponding sub-plate 320 to move. For example, when a driving device drives a sub-plate 320 to separate from one end of the body 310, a new channel for the first medium to flow is formed inside the housing 100; at the same time, another driving device drives another sub-plate 320 to contact the other end of the body 310, thereby forming a blockage at that end, so that the first medium is guided to a new flow path.

[0074] Through the above design, the flow trajectory of the first medium within the shell 100 can be flexibly switched according to the different motion states of the sub-plate 320. As the flow path changes accordingly, a low-velocity region that might form in one state may transform into a flowing region in another, thereby mitigating the long-term presence of dead zones to some extent. This helps reduce the accumulation of fouling or deposits, improves the flow distribution within the shell 100, and provides conditions for enhancing the operational stability and heat exchange efficiency of the heat exchanger.

[0075] In some embodiments, refer to Figure 1 and Figure 2 The heat exchange tube 200 includes a first tube bundle 210 connected to the sub-plate 320. The first tube bundle 210 is fixedly connected to the sub-plate 320 and slidably disposed within the housing 100. When the baffle 300 switches between a first state and a second state, the first tube bundle 210 can slide relative to the housing 100.

[0076] When the baffle 300 switches between the first and second states, the sub-plate 320 moves under the action of the drive device, and the first tube bundle 210 connected to it also slides relative to the housing 100. Through this linkage structure, the sub-plate 320 can synchronously adjust the position of the first tube bundle 210 during the movement, thereby avoiding adverse effects on the connection between the first tube bundle 210 and the housing 100 caused by the movement of the sub-plate 320.

[0077] By fixing the sub-plate 320 to the first tube bundle 210, the situation where the sub-plate 320 cannot move relative to the first tube bundle 210 when there are deposits on the surface of the first tube bundle 210 can be avoided to a certain extent. This structural design is beneficial to maintaining the synchronous movement between the sub-plate 320 and the first tube bundle 210, thereby reducing the operational difficulty required when switching the state of the baffle 300 or adjusting the position of the sub-plate 320. At the same time, it helps to maintain the relative stability of the first tube bundle 210 within the housing 100, thereby having a positive impact on fluid distribution and heat transfer effect.

[0078] For example, the first tube bundle 210 and the housing 100 are connected by a sliding connection structure, allowing the first tube bundle 210 to slide axially or radially relative to the housing 100. A sealing ring may be provided between the first tube bundle 210 and the housing 100 to maintain a seal when the first tube bundle 210 slides, thereby preventing leakage of the first or second medium from the joint to a certain extent. Multiple sets of sealing rings may be arranged at intervals along the length of the first tube bundle 210 to enhance the sealing effect and extend the service life of the sealing components.

[0079] A support member is provided between the heat exchange tube 200 and the housing 100 to support the heat exchange tube 200. In this embodiment, in order to balance the support member's support for the first tube bundle 210 and the sliding function of the first tube bundle 210 within the housing 100, a sliding connection structure is adopted between the support member and the first tube bundle 210. Thus, when the first tube bundle 210 slides relative to the housing 100, it can achieve relatively smooth movement under the guidance of the support member, thereby avoiding, to a certain extent, undesirable displacement of the first tube bundle 210 due to gravity or fluid impact.

[0080] It should be understood that the support member can be a support perforated plate disposed within the housing 100. The support perforated plate has multiple perforations, allowing the first medium to flow through the perforated areas within the housing 100, thereby providing support for the tube bundle without significantly obstructing the flow path of the first medium.

[0081] In some embodiments, refer to Figure 1 and Figure 2 An end plate 500 is provided inside the shell 100, and the end plate 500 is located at both ends of the heat exchange tube 200. Through the cooperation between the end plate 500 and the shell 100, a first heat exchange cavity 510 and a second heat exchange cavity 520 communicating with the heat exchange tube 200 are respectively formed at both ends of the heat exchange tube 200. The first heat exchange cavity 510 is located at one end of the heat exchange tube 200, and the second heat exchange cavity 520 is located at the other end of the heat exchange tube 200.

[0082] A second medium inlet and a second medium outlet are provided on the first heat exchange chamber 510. To achieve the diversion and convergence of the second medium, a partition is provided inside the first heat exchange chamber 510 to divide the first heat exchange chamber 510 into two independent chambers 511 and 512. Chamber 511 is connected to the second medium inlet and to the end of a portion of the heat exchange tubes 200; chamber 512 is connected to the second medium outlet and to the end of another portion of the heat exchange tubes 200.

[0083] During operation, the second medium enters chamber 511 through its inlet and then flows into the heat exchange tube 200 via its port. Inside the heat exchange tube 200, it exchanges heat with the first medium before flowing into the second heat exchange chamber 520 at the other end. Subsequently, the second medium enters another portion of the heat exchange tube 200 connected to chamber 512 through its port at that end, eventually converging into chamber 512 and exiting through its outlet. This allows the second medium to flow in a segmented manner within the heat exchange tube 200, which helps to extend its flow path and achieve more efficient heat exchange.

[0084] In some embodiments, refer to Figure 1 and Figure 2 A corrugated shroud 600 is provided between the first tube bundle 210 and the end plate 500 within the first heat exchange chamber 510 and the second heat exchange chamber 520. One end of the corrugated shroud 600 is fixedly connected to the first tube bundle 210, and the other end is fixedly connected to the end plate 500, thereby defining a sealed space 610 between the corrugated shroud 600 and the end plate 500. When the first tube bundle 210 slides relative to the housing 100, it also slides relative to the end plate 500, at which point the corrugated shroud 600 can fold or unfold accordingly. Throughout the sliding process, the corrugated shroud 600 remains in a sealed state, thereby preventing the first medium inside the housing 100 from leaking into the first heat exchange chamber 510 or the second heat exchange chamber 520 to a certain extent.

[0085] It should be understood that the corrugated cover 600 can be made of a heat-resistant elastic rubber material, which has good elasticity and temperature resistance properties and can undergo elastic deformation when the first tube bundle 210 slides, so as to achieve folding or unfolding. By adopting the corrugated cover 600 structure, on the one hand, it can adapt to the relative displacement of the first tube bundle 210, and on the other hand, it helps to maintain the sealing of the heat exchange cavity.

[0086] The sealed space 610 formed between the corrugated shroud 600, the first tube bundle 210, and the end plate 500 can also buffer leakage to a certain extent. Specifically, if the first medium leaks through the mating point between the first tube bundle 210 and the end plate 500, the leaked first medium will enter the sealed space 610 instead of directly entering the first heat exchange chamber 510 or the second heat exchange chamber 520, thus preventing the first medium from mixing with the second medium. Simultaneously, the second medium in the first heat exchange chamber 510 and the second heat exchange chamber 520 will not seep into the shell 100 and mix with the first medium during its flow. Therefore, by providing the corrugated shroud 600 structure between the first tube bundle 210 and the end plate 500, a sealed state can be maintained even when the first tube bundle 210 slides relative to the end plate, and potential leaks can be isolated, which helps improve the operational stability of the heat exchange device.

[0087] In some embodiments, refer to Figure 1 and Figure 2 The sub-plate 320 is elastically connected to the first tube bundle 210. That is, there is a certain degree of elasticity between the sub-plate 320 and the first tube bundle 210, allowing the sub-plate 320 to deform or rotate relative to the body 310 to a certain extent when subjected to force. Through this elastic connection, when the sub-plate 320 contacts the body 310, the contact force can be buffered to a certain extent, reducing the impact of rigid impacts on the structure. For example, an elastic material is provided at the connection between the sub-plate 320 and the first tube bundle 210, or at least a portion of the material of the sub-plate 320 is an elastic material.

[0088] When the sub-plate 320 moves relative to the housing 100, the angle between the sub-plate 320 and the first tube bundle 210 may change slightly due to friction between them. This angle adjustment can create more complex flow directions within the housing 100, thus diversifying the flow trajectory of the first medium. To a certain extent, this helps improve the distribution of dead zones and increase the contact area between the heat exchange tube 200 and the fluid, thereby providing a more effective cooling effect.

[0089] In some embodiments, refer to Figure 5 and Figure 7 The sub-plate 320 includes a frame 321 and an elastic body 322 covering the frame 321. The first tube bundle 210 includes multiple first tubes 211. The frame 321 has through holes 321a for the first tubes 211 to pass through, and the diameter of the through holes 321a is larger than the diameter of the first tubes 211. The elastic body 322 fills the gap between the first tubes 211 and the through holes 321a, and is fixedly connected to the first tubes 211.

[0090] Because of the large diameter of the through hole 321a, the frame 321 can rotate within a certain range relative to the first tube 211. Simultaneously, the elasticity of the elastomer 322 allows the sub-plate 320 to move relative to the first tube 211 under external force, thus adapting to rotation or displacement caused by external forces. On one hand, this structure can reduce impact force when the sub-plate 320 contacts the body 310; on the other hand, when the sub-plate 320 rubs against the inner wall of the shell 100, the sub-plate 320 can deflect to form a more complex flow direction, thereby facilitating sufficient contact between the first medium and the first tube bundle 210 and improving heat exchange efficiency.

[0091] For example, the skeleton 321 can be made of metal, while the elastomer 322 can be made of heat-resistant rubber or elastic plastic to adapt to different temperature and media environment conditions.

[0092] In some embodiments, refer to Figure 6 and Figure 8 The sub-plate 320 is configured such that, after being connected to the first tube bundle 210, the angle between the plane of the sub-plate 320 and the axial direction of the first tube bundle 210 is acute under the action of the elastic body 322. Here, "acute angle" refers to an angle less than 90°, so that the sub-plate 320 is inclined relative to the first tube bundle 210 within the housing 100. Through this structural arrangement, the sub-plate 320 can guide and direct the first medium to a certain extent; that is, when the first medium flows through the housing 100, the flow direction can be affected by the inclination angle of the sub-plate 320 plane, thereby forming a predetermined flow path.

[0093] Furthermore, the inclined sub-plate 320 allows the angle between the first medium and the surface of the sub-plate 320 to also be acute. This angle is beneficial for the first medium to exert a certain scouring effect on the surface of the sub-plate 320. During this process, due to the scouring effect of the first medium on the surface, the tendency for dirt, deposits, or scale to accumulate on the surface of the sub-plate 320 can be reduced to a certain extent, thereby helping to maintain the heat exchange efficiency between the heat exchange tube bundle 200 and the medium inside the shell 100. For example, the size of the acute angle can be appropriately adjusted according to the actual flow rate and medium properties, so that the sub-plate 320 can both guide the fluid within the shell 100 and allow the fluid to exert a scouring effect on the surface of the sub-plate 320.

[0094] In this description, "subplate 320 plane tilt" means that the surface of subplate 320 is not parallel to the axis of the first tube bundle 210, but forms an angle of less than 90°; "scouring effect" refers to the friction or shear force generated by the fluid flow on the surface, which can remove particles or deposits attached to the surface to a certain extent, but does not mean complete removal. Through the above structure and arrangement, the shape, tilt angle, and elastic connection of subplate 320 work together to optimize the flow path of the first medium in the shell 100, increase the local fluid velocity, and make the heat exchange process more efficient.

[0095] In some embodiments, refer to Figure 7 and Figure 8 The elastic body 322 has a first hole 322a and a second hole 322b that are interconnected; the first tube 211 passes through the first hole 322a and the second hole 322b and is fixedly connected to the inner walls of the first hole 322a and the second hole 322b; the central axis of the first hole 322a intersects or is parallel to the central axis of the second hole 322b; the sub-plate 320 is configured such that when connected to the first tube 211, the elastic body 322 can undergo elastic deformation so that the first tube 211 passes through the first hole 322a, the second hole 322b and the through hole 321a.

[0096] This arrangement allows the elastic body 322 to undergo a certain degree of elastic deformation during the insertion of the first pipe 211. Specifically, the deformation of the elastic body 322 enables the first pipe 211 to pass through the first hole 322a, the second hole 322b, and the through hole 321a on the frame 321, thereby achieving relative fixation and moderate movement between the sub-plate 320 and the first pipe 211.

[0097] Since the central axes of the first hole 322a and the second hole 322b do not coincide, when the first pipe fitting 211 is inserted into the first hole 322a or the second hole 322b, the elastic body 322 at the position of the first hole 322a or the second hole 322b will deform and generate a certain elastic force. This elastic force can make the plane of the sub-plate 320 form a certain angle with respect to the axis of the first pipe fitting 211. This angle is beneficial for the sub-plate 320 to be in an inclined state within the shell 100, so that the flow direction of the first medium when passing through the sub-plate 320 is guided. At the same time, it is beneficial for the first medium to generate a certain amount of scouring on the surface of the sub-plate 320, thereby reducing the accumulation of dirt, deposits or scale on the surface of the sub-plate 320 to a certain extent, which is conducive to maintaining heat exchange efficiency.

[0098] It should be understood that the deformation of the elastomer 322 refers to the ability to produce a recoverable offset or rotation under the action of external force. The size of the included angle can be selected and adjusted according to the flow velocity and flow direction of the first medium so as to form the expected flow guiding effect within the housing 100.

[0099] For example, the tilt angle of the sub-plate 320 can be changed by adjusting the sliding distance of the sub-plate 320 relative to the housing 100. When the sub-plate 320 is in contact with the inner wall of the housing 100, the frictional force of the inner wall of the housing 100 on the sub-plate 320 and the elastic effect of the elastic body 322 of the sub-plate 320 itself can cause the sub-plate 320 to tilt to a certain extent in the desired direction. This tilt can guide the flow direction of the first medium within the housing 100, thereby forming a more complex flow path, which is beneficial to the full contact between the first medium and the first tube bundle 210, and to a certain extent, has a scouring effect on the surface of the sub-plate 320, thereby reducing the accumulation of dirt, deposits or scale.

[0100] It should be understood that the tilt angle of the subplate 320 can be adjusted according to the actual fluid velocity and flow direction in order to form the expected flow guiding effect under different working conditions; the so-called "tilting along the expected direction" means that the subplate 320 forms an angle of less than 90° with respect to the axis of the first tube bundle 210, thereby providing a certain guiding effect during the fluid flow.

[0101] In some embodiments, refer to Figure 7 and Figure 8 The central axes of the first hole 322a and the second hole 322b are parallel to each other, and the central axis of the through hole 321a coincides with the central axis of either the first hole 322a or the second hole 322b. This facilitates the insertion of the first pipe fitting 211 into the first hole 322a, the through hole 321a, and the second hole 322b, thereby improving production efficiency during installation. It should be understood that the inner walls of the first hole 322a and the second hole 322b can be coated with waterproof adhesive or other suitable adhesive materials so that the first pipe fitting 211 can be fixedly connected to the first hole 322a and the second hole 322b after installation, while maintaining the relative stability of the sub-plate 320 and the first pipe fitting 211 to a certain extent.

[0102] In some embodiments, refer to Figure 3 and Figure 4A buffer cavity 322c is provided within the elastic body 322 at the contact point between the sub-plate 320 and the inner wall of the housing 100; multiple flexible limiting ropes 322d are provided within the elastic body 322 surrounding the buffer cavity 322c. The flexible limiting ropes 322d are used to limit the deformation range of the elastic body 322 surrounding the buffer cavity 322c when deformation occurs. It should be understood that since the elastic body 322 may undergo significant thermal expansion and contraction under the influence of external temperature, the buffer cavity 322c can provide a certain buffer when the sub-plate 320 undergoes large deformation, thereby reducing the contact pressure between the sub-plate 320 and the inner wall of the housing 100 to a certain extent and preventing the sub-plate 320 from getting stuck. At the same time, the flexible limiting ropes 322d can limit the excessive deformation of the elastic body 322 when the gas inside the buffer cavity 322c expands, thereby protecting the integrity and elastic properties of the elastic body 322 to a certain extent.

[0103] In some embodiments, refer to Figure 1 and Figure 2 The heat exchange tube 200 also includes a second tube bundle 220 connected to the main body 310; the main body 310 and the second tube bundle 220 are elastically connected; a magnetic adsorption member 400 is provided between the main body 310 and the sub-plate 320 for adsorbing the main body 310 and the sub-plate 320 when they are close to each other; the main body 310 is configured to be able to move relative to the second tube bundle 220 when subjected to external force, so that the angle between the plane on which the main body 310 is located and the second tube bundle 220 is an acute angle.

[0104] Reference Figure 2 and Figure 9 The acute angle can make the surface of the body 310 tilt relative to the second tube bundle 220, thereby changing the angle between the baffle 300 and the heat exchange tube 200 to a certain extent. This is beneficial for the first medium to flow along a predetermined path in the shell 100, and can also play a certain role in scouring the surface of the sub-plate 320 during the flow, making it difficult for dirt, deposits or scale to accumulate on the surface of the sub-plate 320.

[0105] Reference Figure 2 and Figure 9To facilitate the coordinated movement of the main body 310 and the sub-plate 320, a magnetic adsorption element 400 is provided between the main body 310 and the sub-plate 320. When the sub-plate 320 approaches the main body 310, the two can be attracted to each other to a certain extent. For example, the magnetic adsorption element 400 can be a first magnet fixed on the main body 310 and a second magnet fixed on the sub-plate 320. When the sub-plate 320 continues to move after being attracted to the main body 310, due to the adsorption effect, the main body 310 can rotate at a certain angle with the sub-plate 320, thereby changing the angle between the plane of the baffle plate 300 and the heat exchange tube 200, so that the first medium can flow along different paths, thereby achieving the flushing of the dead zone inside the shell 100 and improving the heat exchange efficiency.

[0106] It should be understood that the specific materials and dimensions of the main body 310, the second tube bundle 220, and the elastic element can be selected according to actual usage requirements. For example, the elastic element can be made of heat-resistant rubber or elastic plastic so that it can maintain its elasticity to a certain extent under temperature changes, thereby enabling the main body 310 to move in a controllable manner under external force.

[0107] In some embodiments, the sub-board 320 includes two sets, one set disposed on the first side of the body 310 and the other set disposed on the second side of the body 310; when one set of sub-boards 320 contacts the body 310, the other set of sub-boards 320 separates from the body 310.

[0108] When the sub-plates 320 are driven to move in a predetermined direction by the driving device, one set of sub-plates 320 moves relative to the main body 310, thereby blocking the original gap or opening a new gap. The other set of sub-plates 320 moves in the opposite way, that is, they move simultaneously to open or block the corresponding gaps. In this way, the newly opened gaps are interconnected with other gaps, forming a new path for the first medium to flow, allowing the first medium to flow along the new flow path.

[0109] By moving the subplate 320, the flow trajectory of the first medium can be adjusted within the shell 100, changing the position of the original dead zone. This allows the dirt, deposits, or scale in the original dead zone to be flushed to a certain extent under the new flow path, which helps maintain the cleanliness of the surface of the heat exchange tube bundle 200 and the inside of the shell 100, and improves the heat exchange efficiency and service life to a certain extent.

[0110] For example, there are multiple sub-plates 320, which are arranged side by side along the length of the first tube bundle 210 and fixedly connected to the first tube bundle 210. By fixing multiple sub-plates 320 to the first tube bundle 210, the sub-plates 320 can maintain a consistent relative position when the whole slides or moves, thereby forming a continuous or segmented flow guiding effect, which facilitates uniform flow guidance of the first medium and improves the flow conditions of the original dead zone to a certain extent.

[0111] It should be understood that the movement of the sub-plate 320 can be achieved by a drive device such as a motor, cylinder or screw. The relative movement between the sub-plate 320 and the main body 310 is affected by elastic elements or friction, thereby forming an adjustable flow guiding structure.

[0112] Working principle: The first medium flows within the shell 100, and the second medium flows within the heat exchange tubes 200, thereby achieving heat exchange between the shell side and the tube side. After a preset heat exchange time, a set of sub-plates 320 moves relative to the main body 310 via a drive device or manual operation, thereby creating new gaps or closing existing gaps between them. Simultaneously, another set of sub-plates 320 moves relative to the main body 310, allowing their interaction with the main body 310 to close existing gaps or open new gaps. Through the movement of the sub-plates 320, the flow trajectory of the first medium within the shell 100 changes, thereby adjusting the position of the original flow dead zone. This allows the first medium within the shell 100 to flush away dirt, deposits, or scale that were originally in the dead zone, improving flow uniformity and heat exchange efficiency to a certain extent.

[0113] The movement of the subplate 320 can be adjusted periodically according to usage requirements, and can be achieved manually or automatically by a drive device, thereby flexibly adjusting the flow path of the first medium and realizing adaptive heat exchange of the shell-and-tube heat exchanger under different operating conditions.

[0114] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A porous medium two-phase flow shell-and-tube heat exchanger, characterized in that, include: The housing (100) has an inner cavity (110) for the flow of a first medium; A heat exchange tube (200) is disposed inside the housing (100) for supplying the flow of the second medium; A baffle (300) is disposed inside the housing (100); The baffle (300) includes a body (310) and a sub-plate (320). The sub-plate (320) is movably disposed within the housing (100) so that the baffle (300) can switch between a first state and a second state. The sub-plate (320) includes two sets, one set disposed on the first side of the body (310) and the other set disposed on the second side of the body (310). When one set of the sub-plates (320) comes into contact with the body (310), another set of the sub-plates (320) separates from the body (310), and the number of the sub-plates (320) is greater than the number of the body (310); When the baffle (300) is in the first state, the baffle (300) and the inner wall of the housing (100) together define a first channel (111) for the first medium to flow through; When the baffle (300) is in the second state, the baffle (300) and the inner wall of the housing (100) together define a second channel (112) for the first medium to flow through, and the flow paths of the first channel (111) and the second channel (112) are different.

2. A porous medium two-phase flow shell-and-tube heat exchanger according to claim 1, characterized in that, The heat exchange tube (200) includes a first tube bundle (210) connected to the sub-plate (320), the first tube bundle (210) being fixedly connected to the sub-plate (320) and slidably disposed within the housing (100); When the baffle (300) switches between a first state and a second state, the first tube bundle (210) can slide relative to the housing (100).

3. A porous medium two-phase flow shell-and-tube heat exchanger according to claim 2, characterized in that, The sub-plate (320) is elastically connected to the first tube bundle (210).

4. A porous medium two-phase flow shell-and-tube heat exchanger according to claim 2 or 3, characterized in that, The sub-plate (320) includes a skeleton (321) and an elastomer (322) covering the skeleton (321); The first tube bundle (210) includes a plurality of first tubes (211); The frame (321) is provided with a through hole (321a) for the first pipe (211) to pass through, and the diameter of the through hole (321a) is larger than the diameter of the first pipe (211). The elastomer (322) fills the gap between the first tube (211) and the through hole (321a) and is fixedly connected to the first tube (211).

5. A porous medium two-phase flow shell-and-tube heat exchanger according to claim 4, characterized in that, The subplate (320) is configured such that, after being connected to the first tube bundle (210), under the action of the elastomer (322), the plane containing the subplate (320) forms an acute angle with the axial direction of the first tube bundle (210).

6. A porous medium two-phase flow shell-and-tube heat exchanger according to claim 4, characterized in that, The elastic body (322) is provided with a first hole (322a) and a second hole (322b) that are interconnected; The first pipe fitting (211) passes through the first hole (322a) and the second hole (322b) and is fixedly connected to the inner walls of the first hole (322a) and the second hole (322b); The central axis of the first hole (322a) intersects or is parallel to the central axis of the second hole (322b); The subplate (320) is configured such that when connected to the first tube (211), the elastomer (322) can undergo elastic deformation so that the first tube (211) passes through the first hole (322a), the second hole (322b) and the through hole (321a).

7. A porous medium two-phase flow shell-and-tube heat exchanger according to claim 6, characterized in that, The central axes of the first hole (322a) and the second hole (322b) are parallel to each other, and the central axis of the through hole (321a) coincides with the central axis of the first hole (322a) or the second hole (322b).

8. A porous medium two-phase flow shell-and-tube heat exchanger according to claim 4, characterized in that, A buffer cavity (322c) is provided in the elastic body (322) at the contact point between the subplate (320) and the inner wall of the shell (100); At least a plurality of flexible limiting ropes (322d) are provided in the elastic body (322) surrounding the buffer cavity (322c); The flexible limiting rope (322d) is used to limit the deformation range of the elastic body (322) around the buffer cavity (322c) when the elastic body (322) deforms.

9. A porous medium two-phase flow shell-and-tube heat exchanger according to claim 1, characterized in that, The heat exchange tube (200) also includes a second tube bundle (220) connected to the body (310); The main body (310) is elastically connected to the second tube bundle (220); A magnetic adsorption element (400) is provided between the main body (310) and the sub-plate (320) for adsorbing the main body (310) and the sub-plate (320) together when the sub-plate (320) and the main body (310) are close together; The body (310) is configured to move relative to the second tube bundle (220) when subjected to an external force, such that the angle between the plane on which the body (310) is located and the second tube bundle (220) is an acute angle.

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