Guide plate for shell-and-tube heat exchanger

Abstract

The utility model discloses a guide plate for a shell-and-tube heat exchanger, which relates to the technical field of heat exchangers and comprises a shell, a water outlet pipe and a water inlet pipe are respectively communicated and mounted at the top end and the bottom end of the shell, a delivery pipe is communicated and mounted in the shell, and a guide plate component capable of improving the heat exchange efficiency of the delivery pipe is assembled on the shell. By arranging the through holes, the arc-shaped plates, the fins, the round holes and other structures on the guide plate, the flow path of a heating medium is optimized, the turbulence degree is increased, a laminar flow boundary layer is damaged, and the heat transfer efficiency is improved. The heat exchange area is increased through the snakelike conveying pipe, and the heat exchange effect is further improved; the staggered design of the guide plates and the grooves enables the heating medium to be evenly distributed around the conveying pipe, fluid concentration is avoided, and heat exchange uniformity is improved.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, and in particular to a flow guide plate for a shell-and-tube heat exchanger. Background Technology

[0002] Shell-and-tube heat exchangers, also known as tubular heat exchangers, are a type of general-purpose heat exchange equipment, mainly composed of components such as shell, tube bundle, tube sheet, and end caps.

[0003] While traditional shell-and-tube heat exchangers are widely used in industry, they have some problems. Their baffle design often leads to uneven fluid flow inside the shell-and-tube heat exchanger, affecting heat exchange efficiency. When the heat medium flows in the shell, it is easy for short circuits or uneven distribution to occur, so that some heat exchange tubes cannot fully contact the heat medium, resulting in low overall heat exchange efficiency. Utility Model Content

[0004] The purpose of this utility model is to solve the problem of uneven fluid flow inside shell-and-tube heat exchangers caused by the design of the guide plate, and to propose a guide plate for shell-and-tube heat exchangers.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A baffle plate for a shell-and-tube heat exchanger includes a shell and a conveying assembly, wherein the shell is equipped with a baffle plate assembly capable of improving heat exchange efficiency.

[0007] The guide plate assembly includes several guide plates fixedly installed inside the housing. Several through holes are opened on the guide plates. Several arc-shaped plates are fixedly connected in the grooves of the guide plates. Fins are fixedly connected between the several guide plates. Circular holes are opened on the fins.

[0008] As a further description of the above technical solution:

[0009] The conveying assembly includes an outlet pipe and an inlet pipe connected to the top and bottom of the housing, and a conveying pipe is installed inside the housing.

[0010] As a further description of the above technical solution:

[0011] The delivery pipes are arranged in a serpentine pattern inside the shell. The surface of the delivery pipes inside the shell is coated with a metallic diamond coating with a thickness of 0.2 to 0.8 mm.

[0012] As a further description of the above technical solution:

[0013] Several guide plates are located between the conveying pipes, and the grooves on the guide plates are staggered.

[0014] As a further description of the above technical solution:

[0015] The surfaces of the guide plate and fins are coated with a metal-based graphene composite coating with a thickness of 0.01 to 0.1 mm.

[0016] As a further description of the above technical solution:

[0017] Several curved plates are staggered, and the surface of the curved plates is coated with a diamond-like coating with a thickness of 0.01 to 0.05 mm.

[0018] As a further description of the above technical solution:

[0019] The circular holes are equidistant from each other, and the openings of the holes gradually decrease in size.

[0020] As a further description of the above technical solution:

[0021] The fins are sleeved on the conveying pipe, and the fins are equidistant from each other.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0023] By incorporating structures such as through holes, arc-shaped plates, fins, and circular holes on the guide plate, the flow path of the heat medium is optimized, the degree of turbulence is increased, the laminar boundary layer is disrupted, and the heat transfer efficiency is improved. The serpentine delivery pipe increases the heat exchange area, further enhancing the heat exchange effect; the staggered design of the guide plate and grooves ensures that the heat medium is evenly distributed around the delivery pipe, avoiding fluid concentration and improving heat exchange uniformity. Attached Figure Description

[0024] Figure 1 An overall schematic diagram according to an embodiment of the present utility model is shown;

[0025] Figure 2 A diagram showing the positional relationship between the guide plate and the arc-shaped plate according to an embodiment of the present invention is provided.

[0026] Figure 3 A cross-sectional view of a fin provided according to an embodiment of the present invention is shown;

[0027] Figure 4 The diagram shows the effect of the air deflector assembly after installation according to the embodiment of the present utility model;

[0028] Figure 5 A diagram showing the positional relationship between the guide plate and the conveying pipe according to an embodiment of the present invention is provided.

[0029] Legend:

[0030] 10. Shell; 11. Conveying assembly; 111. Outlet pipe; 112. Inlet pipe; 113. Conveying pipe;

[0031] 20. Deflector assembly; 21. Deflector; 22. Through hole; 23. Arc plate; 24. Fin; 25. Round hole. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0033] like Figures 1-5 As shown, the present invention provides a flow guide plate for a shell-and-tube heat exchanger, comprising a shell 10 and a conveying assembly 11, wherein the shell 10 is equipped with a flow guide plate assembly 20 that can improve heat exchange efficiency.

[0034] The deflector assembly 20 includes several deflector plates 21 fixedly installed inside the housing 10. Several through holes 22 are provided on the deflector plates 21. Several arc-shaped plates 23 are fixedly connected in the grooves of the deflector plates 21. Fins 24 are fixedly connected between the deflector plates 21. Circular holes 25 are provided on the fins 24.

[0035] like Figure 5 As shown, the conveying assembly 11 includes an outlet pipe 111 and an inlet pipe 112 connected to the top and bottom of the housing 10. The heat medium enters the housing 10 through the inlet pipe 112 and is discharged from the housing 10 through the outlet pipe 111.

[0036] This design helps the heat medium fill the entire shell 10 and contact all the delivery pipes 113 (or heat exchange surfaces) to ensure sufficient heat exchange. After the heat medium exchanges heat with the cold medium inside the shell 10, the temperature of the heat medium decreases and then it is discharged through the outlet pipe 111 at the top of the shell 10. This design utilizes the natural convection characteristics of the heat medium, which helps to improve heat exchange efficiency.

[0037] The housing 10 is internally connected to a conveying pipe 113, which is used to convey refrigerant. The refrigerant is conveyed to the housing 10 through one end of the conveying pipe 113, and after heat exchange with the heat medium, the heated refrigerant can be discharged from the other end of the conveying pipe 113.

[0038] In more detail, the delivery pipe 113 is distributed in a serpentine pattern inside the shell 10. By setting the delivery pipe 113 in a serpentine pattern and making multiple turns, the flow path of the refrigerant in the pipe is extended, significantly increasing the surface area of ​​the delivery pipe 113 and providing more heat exchange opportunities between the hot and cold fluids, thereby improving the heat exchange efficiency. The surface of the delivery pipe 113 located inside the shell 10 is provided with a metallic diamond coating with a thickness of 0.2 to 0.8 mm. The high thermal conductivity of diamond gives this coating a significant advantage in the field of thermal management, enabling it to efficiently conduct heat.

[0039] like Figure 4 As shown, several guide plates 21 are located between the conveying pipes 113. The grooves on the guide plates 21 are staggered. Through the guide plates 21 and the grooves, the guide plates 21 can evenly disperse the heat medium entering the shell 10 around the conveying pipes 113, avoiding the heat medium from concentrating in certain areas, thereby improving the uniformity of heat exchange. At the same time, through the through holes 22 on the guide plates 21, the heat medium can flow between the several guide plates 21, thereby changing the flow direction of the heat medium, increasing the turbulence of the heat medium, and destroying the laminar boundary layer of the heat medium, thereby improving the heat transfer efficiency.

[0040] In more detail, the surfaces of the guide plate 21 and the fins 24 are coated with a metal-based graphene composite coating with a thickness of 0.01–0.1 mm. This metal-based graphene composite coating has extremely high thermal conductivity, effectively transferring heat and improving the coating's thermal conductivity efficiency. The increased resistance of the fins 24 to the flowing heat medium increases the residence time of the heat medium between the fins 24 and the guide plate 21, thereby improving heat exchange efficiency. Simultaneously, the circular holes 25, through which the heat medium passes, reduce its flow rate as the opening of the holes changes from large to small. The small size of the hole causes the Bernoulli effect when the heat medium passes through the circular hole 25, resulting in turbulence between the heat medium and the pipe. Since the temperature of the heat medium in contact with the surface of the conveying pipe 113 will decrease, the turbulence can break the thermal boundary layer of the heat medium around the pipe, increase the temperature gradient between the heat medium and the pipe, and thus accelerate heat transfer. At the same time, the turbulence can promote the mixing inside the heat medium, making the temperature distribution of the heat medium more uniform. This helps to avoid overheating or undercooling of the heat medium in local areas, ensuring that the heat medium can effectively exchange heat throughout the entire heat exchange process.

[0041] In more detail, the arc-shaped plates 23 are staggered, and the surface of the arc-shaped plates 23 is coated with a diamond-like carbon (DLC) coating with a thickness of 0.01 to 0.05 mm. The DLC coating has a hardness close to that of diamond, which can significantly improve the hardness and wear resistance of the substrate surface and reduce wear. The arc-shaped plates 23 can guide the heat medium to form a spiral or wave-like flow, destroy the laminar boundary layer of the heat medium, increase the degree of turbulence, and thus improve the heat exchange efficiency. The alternating arc-shaped plates 23 can make the heat medium form a certain backflow and vortex in the groove, prolong the residence time of the heat medium in the heat exchange area, and make the heat exchange more complete. The shape of the arc-shaped plates 23 can evenly distribute the heat medium around the delivery pipe 113, avoid the heat medium from concentrating in certain areas, and improve the uniformity of heat exchange.

[0042] like Figure 3 As shown, several circular holes 25 are equidistant from each other, and the openings of the circular holes 25 gradually decrease in size. Due to the change in the openings of the circular holes 25, the flow velocity of the heat medium increases when it passes through the circular holes 25, and turbulence is generated near the circular holes 25 when it is discharged from the circular holes 25.

[0043] In more detail, the fins 24 are sleeved on the conveying pipe 113, and the fins 24 are equidistant from each other.

[0044] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A baffle plate for a shell-and-tube heat exchanger, comprising a shell (10) and a conveying assembly (11), characterized in that, Also includes: The shell (10) is equipped with a baffle assembly (20) that can improve heat exchange efficiency. The guide plate assembly (20) includes several guide plates (21) fixedly installed inside the housing (10). Several through holes (22) are provided on the guide plates (21). Several arc plates (23) are fixedly connected in the grooves of the guide plates (21). Fins (24) are fixedly connected between the several guide plates (21). Circular holes (25) are provided on the fins (24).

2. A flow guide plate for a shell-and-tube heat exchanger according to claim 1, characterized in that, The conveying assembly (11) includes an outlet pipe (111) and an inlet pipe (112) connected to the top and bottom of the housing (10), and a conveying pipe (113) is connected to the inside of the housing (10).

3. A flow guide plate for a shell-and-tube heat exchanger according to claim 2, characterized in that, The delivery pipe (113) is distributed in a serpentine pattern inside the shell (10). The surface of the delivery pipe (113) inside the shell (10) is provided with a metal-based diamond coating with a thickness of 0.2 to 0.8 mm.

4. A flow guide plate for a shell-and-tube heat exchanger according to claim 2, characterized in that, Several guide plates (21) are located between the conveying pipes (113), and the grooves on the guide plates (21) are staggered.

5. A flow guide plate for a shell-and-tube heat exchanger according to claim 1, characterized in that, The surfaces of the guide plate (21) and fins (24) are provided with a metal-based graphene composite coating with a thickness of 0.01 to 0.1 mm.

6. A flow guide plate for a shell-and-tube heat exchanger according to claim 1, characterized in that, Several arc-shaped plates (23) are staggered, and the surface of the arc-shaped plates (23) is provided with a diamond-like coating with a thickness of 0.01 to 0.05 mm.

7. A flow guide plate for a shell-and-tube heat exchanger according to claim 1, characterized in that, The circular holes (25) are equidistant from each other, and the openings of the circular holes (25) decrease in size.

8. A flow guide plate for a shell-and-tube heat exchanger according to claim 7, characterized in that, The fins (24) are sleeved on the conveying pipe (113), and the fins (24) are equidistant from each other.

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