Pipe heat exchanger for petroleum processing

Abstract

The application relates to the technical field of heat exchangers, and discloses a tubular heat exchanger for petroleum processing, which comprises a heat exchanger shell, first pipe box plugs and second pipe box plugs are arranged at two ends of the heat exchanger shell respectively, pipe plates are fixed at the two ends of the heat exchanger shell, a plurality of straight-flow heat exchange pipes are fixed between the two pipe plates, a plurality of adjustable-spacing arc baffles are arranged on the straight-flow heat exchange pipes, rotating rods are rotatably connected to the pipe plates, annular grooves and a plurality of arc grooves are respectively arranged on the rotating rods; in the application, the plurality of arc baffles can be close to each other or be expanded, the spacing between two adjacent arc baffles can be adjusted, the heat exchange efficiency can be improved when the fluid flow speed is low, the fluid can be prevented from excessively turbulent flow when the fluid flow speed is high, the impact on the straight-flow heat exchange pipes can be reduced, the abrasion can be reduced, and the service life can be prolonged.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger technology, specifically to a tubular heat exchanger for petroleum processing. Background Technology

[0002] With the rapid development of industrial production, HVAC, new energy, petrochemicals and other fields, heat exchangers, as core equipment for heat transfer and energy recovery, are widely used in key scenarios such as waste heat recovery, fluid cooling, and heating heat exchange. Their heat exchange efficiency, operational stability, energy consumption level and adaptability directly affect the energy utilization rate, operating cost and environmental performance of the entire production system, and are an important support for promoting industrial energy conservation and emission reduction and achieving green development.

[0003] Currently, existing heat exchanger solutions are mainly divided into two categories: shell-and-tube heat exchangers and plate heat exchangers. Shell-and-tube heat exchangers achieve heat exchange through the counter-current flow of different fluids in the shell and tube sides. They possess high structural strength and good high-pressure resistance, making them suitable for high-temperature and high-pressure conditions. However, in shell-and-tube heat exchangers, the curved baffles are mostly installed at fixed intervals, making it impossible to adjust the spacing according to fluid flow rate and heat exchange requirements. This results in poor adaptability to heat exchange efficiency, and insufficient turbulence intensity at low flow velocities. Furthermore, an assembly gap must be reserved between the curved baffles and the heat exchange tubes. At high flow velocities, while meeting heat exchange efficiency requirements, excessive turbulence can easily occur, leading to heat exchange tube vibration, wear, and breakage, thus shortening the service life of the heat exchange tubes. Summary of the Invention

[0004] This invention provides a tubular heat exchanger for petroleum processing, comprising several arc-shaped baffles that can be brought closer together or extended, allowing adjustment of the spacing between adjacent baffles. When the hot fluid velocity decreases, this enhances fluid turbulence, increases turbulence intensity, and improves heat exchange efficiency. When the hot fluid velocity increases, it maintains heat exchange efficiency while preventing excessive turbulence, reducing impact on the direct-flow heat exchange tubes, decreasing wear, and extending the service life of the direct-flow heat exchange tubes. It also includes a movable conical sealing ring that reinforces the arc-shaped baffles as the hot fluid velocity increases. The improved connection stability with the DC heat exchanger tube reduces the vibration amplitude of the DC heat exchanger tube under fluid impact, thus enhancing the protective effect. This addresses the issues mentioned in the background technology, where existing arc-shaped baffles are mostly installed at fixed intervals, making it impossible to adjust the interval according to fluid flow rate and heat exchange requirements. This results in poor heat exchange efficiency adaptability, insufficient fluid turbulence intensity at low flow velocities, and the need to reserve an assembly gap between the arc-shaped baffle and the heat exchanger tube. At high flow velocities, while meeting heat exchange efficiency requirements, excessive turbulence can easily occur, leading to heat exchanger tube vibration, wear, and breakage, thereby reducing the service life of the heat exchanger tube.

[0005] The present invention provides the following technical solution: a tubular heat exchanger for petroleum processing, comprising a heat exchanger shell, wherein a first tube box plug and a second tube box plug are respectively provided at both ends of the heat exchanger shell, and tube sheets are fixed at both ends of the heat exchanger shell, wherein a plurality of direct-flow heat exchange tubes are fixed between the two tube sheets, wherein a plurality of arc-shaped baffles with adjustable spacing are provided on the direct-flow heat exchange tubes, and a rotating rod is rotatably connected to the tube sheet, wherein an annular groove and a plurality of arc-shaped grooves are respectively opened on the rotating rod; The arc-shaped baffle plate has several conical through holes, and a movable sealing piece is provided in each conical through hole. A circular mounting base is fixed on the arc-shaped baffle plate, and a movable conical sealing ring is provided in the circular mounting base.

[0006] As an optional embodiment of the tubular heat exchanger for petroleum processing described in this invention, wherein: the arc-shaped baffle is fitted onto the direct current heat exchange tube, and the arc-shaped baffle is slidably connected to the rotating rod, and a plurality of arc-shaped grooves are distributed on both sides of the annular groove.

[0007] As an optional embodiment of the tubular heat exchanger for petroleum processing described in this invention, wherein: two first guide rods are installed on one of the arc-shaped baffle plates, the first guide rods being inserted into the annular groove; and two second guide rods are installed on the arc-shaped baffle plate located on one side of the arc-shaped groove, the second guide rods being inserted into the arc-shaped groove.

[0008] As an optional embodiment of the tubular heat exchanger for petroleum processing described in this invention, one end of the rotating rod is rotatably connected to the second tube box plug, and a servo motor is fixed on the second tube box plug, with the motor shaft of the servo motor fixedly connected to one end of the rotating rod.

[0009] As an optional embodiment of the tubular heat exchanger for petroleum processing described in this invention, the heat exchanger shell is respectively connected to a first connecting pipe and a second connecting pipe, a third connecting pipe is connected to the first tube box plug, and a fourth connecting pipe is connected to the second tube box plug.

[0010] As an optional embodiment of the tubular heat exchanger for petroleum processing described in this invention, wherein: the circular mounting base is fitted onto the direct current heat exchange tube, and a connecting piece is fixed on the circular mounting base; a first guide rod is fixed on the sealing piece, and the first guide rod is elastically connected to the connecting piece via a first spring.

[0011] As an optional embodiment of the tubular heat exchanger for petroleum processing described in this invention, wherein: the conical sealing ring is fitted onto the direct current heat exchange tube, a second guide rod is fixed on the circular mounting base, the conical sealing ring is elastically connected to the second guide rod via a second spring, and a first abutting wedge is fixed on one side of the conical sealing ring.

[0012] As an optional embodiment of the tubular heat exchanger for petroleum processing described in this invention, wherein: a contact rod is provided on one side of the conical through hole, the contact rod is slidably connected to the circular mounting base and the arc-shaped baffle, a limit ring is fixed on the contact rod, and one end of the contact rod abuts against the first contact wedge, and the limit ring is located inside the circular mounting base.

[0013] As an optional embodiment of the tubular heat exchanger for petroleum processing described in this invention, the circular mounting base is provided with two semi-circular scrapers, and a third guide rod is fixed on the semi-circular scrapers. The third guide rod is elastically connected to the circular mounting base through a third spring.

[0014] As an optional embodiment of the tubular heat exchanger for petroleum processing described in this invention, wherein: two third abutting columns are fixed on the conical sealing ring, and two second abutting wedges are fixed on each of the two semi-circular scrapers, and the third abutting columns abut against the second abutting wedges.

[0015] The present invention has the following beneficial effects:

[0016] 1. In this tubular heat exchanger for petroleum processing, a tube sheet is used to fix both ends of several direct-flow heat exchange tubes, improving the stability of the direct-flow heat exchange tubes during operation. Simultaneously, the tube sheet can seal the heat exchanger shell, achieving the separation of cold and hot fluids. An annular groove on the rotating rod connects to a first guide rod fixed to one of the arc-shaped baffles. The remaining arc-shaped baffles are distributed on both sides of the annular groove and connected to their corresponding arc-shaped grooves via second guide rods. When the rotating rod rotates, the arc-shaped baffles can move closer together or expand, allowing adjustment of the distance between adjacent arc-shaped baffles. When the hot fluid velocity decreases, the arc-shaped baffles on both sides automatically converge, reducing the distance to enhance fluid turbulence, increase turbulence intensity, and improve heat exchange efficiency. When the hot fluid velocity increases, the arc-shaped baffles on both sides expand to reduce resistance. While maintaining heat exchange efficiency, this avoids excessive fluid turbulence, reduces the impact on the direct-flow heat exchange tubes, reduces wear, and extends the service life of the direct-flow heat exchange tubes.

[0017] 2. In this tubular heat exchanger for petroleum processing, the conical through-holes on the arc-shaped baffle plate are used for the flow of hot fluid. The sealing plates inside the conical through-holes can adjust the flow rate. When the flow rate of the hot fluid decreases, the internal pressure of the heat exchanger shell is low, and the sealing plates block the conical through-holes, reducing the opening area of ​​the arc-shaped baffle plate, enhancing fluid turbulence, increasing the intensity of fluid turbulence, and allowing the hot and cold fluids to come into more complete contact. This compensates for the shortcoming of insufficient fluid mixing at low flow rates and improves heat exchange efficiency. When the flow rate of the hot fluid increases, the internal pressure of the heat exchanger shell is higher, causing the sealing plates to automatically open the conical through-holes, increasing the opening area of ​​the arc-shaped baffle plate. While maintaining heat exchange, this can disperse the impact force of the fluid and reduce the impact and vibration on the direct-flow heat exchange tubes.

[0018] 3. In this tubular heat exchanger for petroleum processing, the conical sealing ring installed in the circular mounting base can move horizontally along the direct current heat exchange tube and is used to insert into the gap between the direct current heat exchange tube and the arc-shaped baffle. On the one hand, it can improve the gap sealing effect and improve the heat exchange efficiency. On the other hand, when the hot fluid velocity increases, it can enhance the connection stability between the arc-shaped baffle and the direct current heat exchange tube, reduce the vibration amplitude of the direct current heat exchange tube under fluid impact, and improve the protection effect of the direct current heat exchange tube. Through the cooperation of the first contact wedge, the contact rod and the sealing plate, the greater the pressure on the sealing plate, the greater the flow of the conical through hole. At the same time, the sealing effect of the conical sealing ring on the gap is better. The two semi-circular scrapers installed on the circular mounting base of the arc-shaped baffle can move synchronously with the arc-shaped baffle, which can achieve the purpose of scraping off the dirt attached to the direct current heat exchange tube and reduce the wear of the conical sealing ring. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a cross-sectional view of the structure of the present invention.

[0021] Figure 3 This is a schematic diagram of the internal structure of the heat exchanger shell of the present invention.

[0022] Figure 4 This is a schematic diagram of the arc-shaped baffle structure of the present invention.

[0023] Figure 5 This is a schematic diagram of the rotating rod structure of the present invention.

[0024] Figure 6 This is a schematic diagram of the conical sealing ring and sealing plate structure of the present invention.

[0025] Figure 7 This is a schematic diagram of the semi-circular scraper structure of the present invention.

[0026] Figure 8 for Figure 2 Enlarged view of point A in the middle.

[0027] Figure 9 for Figure 4 Enlarged view of section B in the middle.

[0028] In the diagram: 1. Heat exchanger shell; 2. First tube box plug; 3. Second tube box plug; 4. Tube sheet; 5. Direct current heat exchange tube; 6. Arc-shaped baffle; 7. Rotating rod; 8. Annular groove; 9. Arc-shaped groove; 10. Conical through hole; 11. Sealing plate; 12. Circular mounting base; 13. Conical sealing ring; 14. First guide rod; 15. Second guide rod; 16. Servo motor; 17. First connecting pipe; 18. Second connecting pipe; 19. Third connecting pipe; 20. Fourth connecting pipe; 21. Connecting piece; 22. First guide rod; 23. First spring; 24. Second guide rod; 25. Second spring; 26. Abutment rod; 27. First abutment wedge; 28. Limiting ring; 29. ​​Semi-circular scraper; 30. Third guide rod; 31. Third spring; 32. Third abutment column; 33. Second abutment wedge. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1, please refer to Figures 1 to 9 A tubular heat exchanger for petroleum processing includes a heat exchanger shell 1, with a first tube box plug 2 and a second tube box plug 3 respectively provided at both ends of the heat exchanger shell 1, and tube sheets 4 fixed at both ends of the heat exchanger shell 1. Several direct heat exchange tubes 5 are fixed between the two tube sheets 4, and several arc-shaped baffles 6 with adjustable spacing are provided on the direct heat exchange tubes 5. A rotating rod 7 is rotatably connected to the tube sheet 4, and the rotating rod 7 is respectively provided with an annular groove 8 and several arc-shaped grooves 9. The arc-shaped baffle plate 6 has several tapered through holes 10, and a movable sealing piece 11 is provided in the tapered through holes 10. A circular mounting base 12 is fixed on the arc-shaped baffle plate 6, and a movable tapered sealing ring 13 is provided in the circular mounting base 12.

[0031] The arc-shaped baffle plate 6 is mounted on the DC heat exchange tube 5, and the arc-shaped baffle plate 6 is slidably connected to the rotating rod 7. Several arc-shaped grooves 9 are distributed on both sides of the annular groove 8.

[0032] Two first guide rods 14 are installed on one of the arc-shaped baffles 6, and the first guide rods 14 are inserted into the annular groove 8. Two second guide rods 15 are installed on the arc-shaped baffle 6 located on one side of the arc-shaped groove 9, and the second guide rods 15 are inserted into the arc-shaped groove 9.

[0033] One end of the rotating rod 7 is rotatably connected to the second pipe box plug 3, and a servo motor 16 is fixed on the second pipe box plug 3. The motor shaft of the servo motor 16 is fixedly connected to one end of the rotating rod 7.

[0034] The heat exchanger shell 1 is connected to a first connecting pipe 17 and a second connecting pipe 18, the first tube box plug 2 is connected to a third connecting pipe 19, and the second tube box plug 3 is connected to a fourth connecting pipe 20.

[0035] refer to Figures 1 to 5 In operation, the cold fluid injection pipe is connected to the third connector 19 of the first tube box plug 2, allowing the cold fluid to flow through the tube sheet 4 into several direct-flow heat exchange tubes 5, and then exit through the fourth connector 20 on the second tube box plug 3. The hot fluid is injected into the heat exchanger shell 1 through the first connector 17 below the heat exchanger shell 1, and flows along a "Z"-shaped path between several arc-shaped baffles 6, causing the hot fluid to repeatedly zigzag and contact several direct-flow heat exchange tubes 5 for heat exchange. After heat exchange, the temperature of the hot fluid decreases, and it exits from the second connector 18 above the heat exchanger shell 1. When the hot fluid flow rate decreases, the system is activated. The servo motor 16 drives the rotating rod 7 to rotate to one side, causing the arc-shaped baffles 6 on both sides of the rotating rod 7 to move closer to the central arc-shaped baffle 6, reducing the distance between them. The arc-shaped baffles 6 on both sides of the rotating rod 7 move horizontally along the DC heat exchange tube 5. The second guide rod 15 on the arc-shaped baffle 6 slides along the arc-shaped groove 9 on the rotating rod 7. The arc-shaped baffle 6 in the middle of the rotating rod 7 remains stationary. The first guide rod 14 on the other arc-shaped baffles 6 slides along the annular groove 8 to adjust the distance, so as to enhance the turbulence of the hot fluid, improve the turbulence intensity of the hot fluid, and improve the heat exchange efficiency. When the flow rate of the hot fluid increases, the servo motor 16 drives the rotating rod 7 to rotate to one side. The arc-shaped baffles 6 on both sides of the rotating rod 7 move in the opposite direction along the DC heat exchange tube 5, causing the arc-shaped baffles 6 on both sides of the rotating rod 7 to unfold, which increases the flow distance. While maintaining the heat exchange efficiency, it can reduce the resistance between the hot fluid and the arc-shaped baffles 6, so as to alleviate the impact force of the hot fluid on the arc-shaped baffles 6 and the DC heat exchange tube 5, reduce the wear caused by vibration on the DC heat exchange tube 5, improve the protection of the DC heat exchange tube 5, so as to extend the service life of the DC heat exchange tube 5 and reduce the number of times the DC heat exchange tube 5 needs to be replaced.

[0036] In the fields of oil refining and petrochemical production, the processes of condensing and cooling oil and gas at the top of atmospheric and vacuum towers, cooling of light hydrocarbons and hydrogen media, and heat exchange and cooling of various clean oil products generally have the technical characteristics of large medium flow rate, high fluid cleanliness, and only need to meet the conventional heat exchange requirements without pursuing enhanced heat transfer performance. In response to these operating conditions, increasing the spacing of the arc-shaped baffles can effectively reduce shell-side pressure, reduce fluid flow resistance, suppress tube bundle vibration, and significantly improve the operational stability and reliability of heat exchange equipment.

[0037] Example 2 is an improvement upon Example 1. For details, please refer to [link / reference]. Figures 1 to 9 A circular mounting base 12 is fitted onto the DC heat exchange tube 5, and a connecting piece 21 is fixed on the circular mounting base 12. A first guide rod 22 is fixed on the sealing piece 11, and the first guide rod 22 is elastically connected to the connecting piece 21 through a first spring 23.

[0038] The conical sealing ring 13 is fitted onto the DC heat exchange tube 5. A second guide rod 24 is fixed on the circular mounting base 12. The conical sealing ring 13 is elastically connected to the second guide rod 24 through a second spring 25. A first abutting wedge 27 is fixed on one side of the conical sealing ring 13.

[0039] A contact rod 26 is provided on one side of the tapered through hole 10. The contact rod 26 is slidably connected to the circular mounting base 12 and the arc-shaped baffle 6 respectively. A limit ring 28 is fixed on the contact rod 26, and one end of the contact rod 26 abuts against the first contact wedge 27. The limit ring 28 is located inside the circular mounting base 12.

[0040] refer to Figures 1 to 9 The faster the flow rate of the hot fluid, the greater the internal pressure of the heat exchanger shell 1. This allows the hot fluid to flow into the conical through-hole 10 when it comes into contact with the surface of the arc-shaped baffle 6. This pushes the sealing plate 11 to slide within the conical through-hole 10. At the same time, the first guide rod 22 slides on the connecting plate 21, and the first spring 23 stores force, causing the sealing plate 11 to release the seal on the conical through-hole 10. This allows some of the hot fluid to flow within the conical through-hole 10, enabling the hot fluid to pass directly through the arc-shaped baffle 6, reducing local pressure, making the flow rate more uniform, dispersing the impact force, and reducing the impact and vibration on the DC heat exchange tube 5. When the hot fluid flow rate is low, the internal pressure of the heat exchanger shell 1 is small. The hot fluid cannot push the sealing plate 11 in the conical through hole 10, so the sealing plate 11 remains in the sealing state of the conical through hole 10, reducing the opening area of ​​the arc-shaped baffle 6. At the same time, with the arc-shaped baffle 6 with the reduced spacing, the fluid disturbance is enhanced, the fluid turbulence intensity is increased, and the hot and cold fluids are in more complete contact, which makes up for the shortcoming of insufficient fluid mixing at low flow rate and improves heat exchange efficiency.

[0041] When the hot fluid velocity is high, the sealing plate 11 releases its blockage of the conical through-hole 10 and moves horizontally within the conical through-hole 10. This allows the sealing plate 11 to contact one end of the contact rod 26, causing the contact rod 26 to slide within the arc-shaped baffle 6 and the circular mounting base 12. This increases the contact force between the contact rod 26 and the first contact wedge 27, causing the conical sealing ring 13 to slide on the second guide rod 24. The second spring 25 stores force, causing the conical sealing ring 13 to move towards the arc-shaped baffle 6. Inserted into the gap between the arc-shaped baffle 6 and the DC heat exchange tube 5, it can improve the gap sealing effect and increase the heat exchange efficiency. On the other hand, when the flow rate of the hot fluid increases, it can enhance the connection stability between the arc-shaped baffle 6 and the DC heat exchange tube 5, reduce the vibration amplitude of the DC heat exchange tube 5 under fluid impact, and improve the protection effect of the DC heat exchange tube 5. The greater the pressure on the sealing plate 11, the greater the flow rate of the hot fluid through the conical through hole 10, and the better the sealing effect of the conical sealing ring 13 on the gap. When the flow rate of the hot fluid decreases, the impact force of the hot fluid on the DC heat exchange tube 5 is small, and the vibration force on the DC heat exchange tube 5 is small. The conical sealing ring 13 at the initial position can reduce the wear between the arc-shaped baffle 6 and the adjacent DC heat exchange tube 5.

[0042] The conical sealing ring 13 is made of flexible graphite and is suitable for dynamic and static sealing under harsh conditions such as high temperature, high pressure and strong corrosion. It has excellent temperature resistance, self-lubrication and chemical stability.

[0043] Example 3 is an improvement upon Example 2. For details, please refer to [link / reference]. Figures 1 to 9 The circular mounting base 12 is provided with two semi-circular scrapers 29, and a third guide rod 30 is fixed on the semi-circular scraper 29. The third guide rod 30 is elastically connected to the circular mounting base 12 through a third spring 31.

[0044] Two third abutting posts 32 are fixed on the conical sealing ring 13, and two second abutting wedges 33 are fixed on the two semi-circular scrapers 29. The third abutting posts 32 abut against the second abutting wedges 33.

[0045] refer to Figures 1 to 9If the hot fluid contains impurities and flows in the heat exchanger shell 1 for a long time, it is easy to adhere to the DC heat exchange tube 5. When the conical sealing ring 13 moves along the DC heat exchange tube 5, it is easy to come into contact with the impurities, which will wear out over time and affect the sealing effect. It is necessary to remove the impurities locally attached to the DC heat exchange tube 5 during the adjustment of the arc-shaped baffle 6 spacing. The two semi-circular scrapers 29 on the circular mounting base 12 are attached to the DC heat exchange tube 5, and the third spring 31 is in the storage state. When the arc-shaped baffle 6 reciprocates to adjust the spacing, the moving arc-shaped baffle 6 can drive the two semi-circular scrapers 29 to move synchronously, so as to scrape off the impurities attached to the DC heat exchange tube 5 on the moving path of the arc-shaped baffle 6, so as to reduce the wear of the conical sealing ring 13 and improve the protection effect. When the flow rate of the hot fluid increases, the conical sealing ring 13 moves horizontally, causing the two third contact posts 32 to disengage from the second contact wedges 33 on the two semi-circular scrapers 29. The third spring 31 releases its elastic force, causing the third guide rod 30 to slide on the circular mounting base 12, so that the two semi-circular scrapers 29 separate from the DC heat exchange tube 5. When the flow rate of the hot fluid is high, it avoids the DC heat exchange tube 5 from being vibrated and colliding with the semi-circular scrapers 29, which can improve the protection of the DC heat exchange tube 5.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A tubular heat exchanger for petroleum processing, comprising a heat exchanger shell (1), characterized in that: The heat exchanger shell (1) is provided with a first tube box plug (2) and a second tube box plug (3) at both ends, and tube sheets (4) are fixed at both ends of the heat exchanger shell (1). Several direct heat exchange tubes (5) are fixed between the two tube sheets (4). Several adjustable arc-shaped baffles (6) are provided on the direct heat exchange tubes (5). A rotating rod (7) is rotatably connected to the tube sheet (4). An annular groove (8) and several arc-shaped grooves (9) are respectively opened on the rotating rod (7). The arc-shaped baffle (6) has several conical through holes (10), and a movable sealing piece (11) is provided in the conical through hole (10). A circular mounting base (12) is fixed on the arc-shaped baffle (6), and a movable conical sealing ring (13) is provided in the circular mounting base (12).

2. The tubular heat exchanger for petroleum processing according to claim 1, characterized in that: The arc-shaped baffle (6) is fitted onto the DC heat exchange tube (5), and the arc-shaped baffle (6) is slidably connected to the rotating rod (7). Several arc-shaped grooves (9) are distributed on both sides of the annular groove (8).

3. The tubular heat exchanger for petroleum processing according to claim 1, characterized in that: Two first guide rods (14) are installed on one of the arc-shaped baffles (6), and the first guide rods (14) are inserted into the annular groove (8). Two second guide rods (15) are installed on the arc-shaped baffle (6) located on one side of the arc-shaped groove (9), and the second guide rods (15) are inserted into the arc-shaped groove (9).

4. The tubular heat exchanger for petroleum processing according to claim 1, characterized in that: One end of the rotating rod (7) is rotatably connected to the second pipe box plug (3), and a servo motor (16) is fixed on the second pipe box plug (3). The motor shaft of the servo motor (16) is fixedly connected to one end of the rotating rod (7).

5. The tubular heat exchanger for petroleum processing according to claim 1, characterized in that: The heat exchanger shell (1) is connected to a first pipe (17) and a second pipe (18), the first pipe box plug (2) is connected to a third pipe (19), and the second pipe box plug (3) is connected to a fourth pipe (20).

6. The tubular heat exchanger for petroleum processing according to claim 1, characterized in that: The circular mounting base (12) is fitted onto the DC heat exchange tube (5), and a connecting piece (21) is fixed on the circular mounting base (12). A first guide rod (22) is fixed on the sealing piece (11), and the first guide rod (22) is elastically connected to the connecting piece (21) through a first spring (23).

7. The tubular heat exchanger for petroleum processing according to claim 1, characterized in that: The conical sealing ring (13) is fitted onto the DC heat exchange tube (5), and a second guide rod (24) is fixed on the circular mounting base (12). The conical sealing ring (13) is elastically connected to the second guide rod (24) through a second spring (25), and a first abutting wedge (27) is fixed on one side of the conical sealing ring (13).

8. The tubular heat exchanger for petroleum processing according to claim 7, characterized in that: A contact rod (26) is provided on one side of the tapered through hole (10). The contact rod (26) is slidably connected to the circular mounting base (12) and the arc-shaped baffle (6). A limit ring (28) is fixed on the contact rod (26), and one end of the contact rod (26) abuts against the first contact wedge (27). The limit ring (28) is located inside the circular mounting base (12).

9. The tubular heat exchanger for petroleum processing according to claim 1, characterized in that: The circular mounting base (12) is provided with two semi-circular scrapers (29), and a third guide rod (30) is fixed on the semi-circular scraper (29). The third guide rod (30) is elastically connected to the circular mounting base (12) through a third spring (31).

10. The tubular heat exchanger for petroleum processing according to claim 9, characterized in that: Two third abutting posts (32) are fixed on the conical sealing ring (13), and two second abutting wedges (33) are fixed on the two semi-circular scrapers (29). The third abutting posts (32) abut against the second abutting wedges (33).

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