Efficient heat exchanger for petrochemical industry

Abstract

The invention discloses an efficient heat exchanger for petrochemical engineering, and belongs to the field of heat exchangers. A backflow box is arranged at the top end of the shell, and a feeding box and a discharging box are arranged at the bottom end of the shell. Two cylindrical supports are vertically and rotatably inserted into the inner bottom wall of the backflow box, and the bottom ends of the two supports extend to the inner top wall of the feeding box and the inner top wall of the discharging box correspondingly. A plurality of heat conduction pipes are fixedly inserted into each support, and the two ends of each heat conduction pipe penetrate through the corresponding support. A rotating mechanism for driving the bracket to rotate is arranged on the backflow box; each heat conduction pipe is movably sleeved with a circular ring sleeve, and the circular ring sleeves are used for scraping the outer walls of the heat conduction pipes. Through mutual cooperation of the support, the rotating mechanism and the heat conduction pipe, in the working process, the support can be driven to rotate through the rotating mechanism, so that impurities attached to the surface of the heat conduction pipe are thrown away, meanwhile, the heat conduction pipe in the rotating state can stir high-temperature fluid in the shell, and the probability that the high-temperature fluid without heat exchange makes contact with the heat conduction pipe is increased; and the heat conduction effect is improved.

Description

Technical Field

[0001] The present invention relates to the field of heat exchangers, and more particularly to a high-efficiency heat exchanger for petrochemical industry. Background Art

[0002] A heat exchanger, also known as a heat exchanger, is a device that transfers some of the heat from a hot fluid to a cold fluid. Heat exchangers play a vital role in chemical, petroleum, power, food, and many other industrial processes. In chemical production, heat exchangers are widely used as heaters, coolers, condensers, evaporators, and reboilers.

[0003] When a chemical heat exchanger is working, it usually continuously puts hot fluid into the shell side, and at the same time puts the chemical petroleum raw materials that need heat exchange treatment into the tube side, and performs heat exchange treatment through the circulation of petroleum raw materials and heat medium.

[0004] During operation, petrochemical heat exchangers typically distribute high-viscosity fluids, solids-laden slurries, or media prone to coking to the shell side. The larger shell side allows for the installation of mechanical scrapers or pigging techniques, facilitating fouling removal. However, these media can easily form fouling layers on the outer walls of the heat exchange tubes when flowing through the shell side, significantly reducing heat transfer efficiency. Furthermore, low-velocity areas, such as those behind baffles, can easily form dead zones, leading to inadequate contact between the fluid and the heat exchange tubes, further impairing heat transfer performance.

[0005] Therefore, a high-efficiency heat exchanger for petrochemical industry is proposed. Summary of the Invention

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide a high-efficiency heat exchanger for petrochemical industry, which can increase the contact probability between the high-temperature fluid in the shell and the heat pipe, thereby improving the heat exchange effect.

[0007] To solve the above problems, the present invention adopts the following technical solutions.

[0008] A high-efficiency heat exchanger for petrochemical industry comprises a shell;

[0009] The top of the shell is provided with a reflux box, and the bottom of the shell is provided with a feed box and a discharge box;

[0010] Two cylindrical brackets are vertically rotatably inserted on the inner bottom wall of the reflux box, and the bottom ends of the two brackets extend to the inner top wall of the feed box and the inner top wall of the discharge box respectively;

[0011] Each bracket is fixed with multiple heat pipes, and both ends of the heat pipes pass through the corresponding brackets;

[0012] The reflux box is provided with a rotating mechanism for driving the bracket to rotate;

[0013] Each heat pipe is provided with a circular sleeve for scraping the outer wall of the heat pipe, and each bracket is provided with a driving mechanism for driving the corresponding circular sleeve to reciprocate along the surface of the corresponding heat pipe.

[0014] Furthermore, the rotating mechanism includes a driving gear and a driven gear respectively fixedly mounted on the two bracket rotating shafts, the driven gear is engaged with the driving gear, and a motor for driving the driving gear to rotate is fixedly mounted on the top wall of the reflux box.

[0015] Furthermore, the driving mechanism includes mounting rods respectively inserted vertically and rotatably on the inner bottom walls of the two brackets;

[0016] The bottom ends of the two mounting rods are fixedly connected to the corresponding inner bottom wall of the feed box and the inner bottom wall of the discharge box respectively;

[0017] A reciprocating screw is installed at the top of each mounting rod, and a slider is threadedly installed on both reciprocating screws;

[0018] A connecting frame is fixedly installed on the side wall of the sliding block, and the connecting frame is fixedly connected to all the circular ring sleeves on the corresponding brackets.

[0019] Furthermore, bellows are fixedly mounted on the top and bottom walls of the slider, the bellows are sleeved on the reciprocating screw, and one end of each bellows away from the slider is fixedly connected to the bracket.

[0020] Furthermore, a guide cavity is opened on the top wall and the bottom wall of the bracket, a plurality of pressure relief holes are opened on the side walls on adjacent sides of the two guide cavities, and a transfer mechanism is provided in the shell for transferring the high-temperature fluid between the inner wall of the shell and the outer wall of the bracket to the guide cavity.

[0021] Furthermore, the bellows includes an inner tube and an outer tube, the outer tube is fixedly sleeved on the outside of the inner tube, the transfer mechanism includes a cavity opened on the inner side wall of the outer tube, an inlet valve and a drain valve are embedded on the side wall of the cavity, the output end of the drain valve is connected to the diversion cavity, and a conduit is fixedly installed on the input end of the water inlet valve, and the distance between the end of the conduit away from the water inlet valve and the inner wall of the shell is 0.5-1 cm.

[0022] Furthermore, stirring rods are evenly fixedly mounted on the outer side wall of the bracket.

[0023] Furthermore, the bellows is made of nickel-based high-temperature alloy material.

[0024] Furthermore, the top wall and the bottom wall of the annular sleeve are both inclined surfaces.

[0025] Furthermore, a through hole is provided on the bottom wall of the bracket, the mounting rod and the side wall of the through hole are both mirror surfaces, and the mounting rod is inserted into the through hole.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] (1) This solution uses the mutual cooperation of the bracket, the rotating mechanism and the heat pipe. During operation, the rotating mechanism can drive the bracket to rotate, thereby shaking off impurities attached to the surface of the heat pipe. At the same time, the rotating heat pipe can stir the high-temperature fluid in the shell, increasing the probability of the unheated high-temperature fluid contacting the heat pipe and improving the heat conduction effect.

[0028] (2) This solution uses the support, the annular sleeve, the reciprocating screw and the connecting frame to cooperate with each other. During the rotation of the support, the annular sleeve can be driven by the reciprocating screw to move back and forth on the surface of the heat pipe, thereby removing impurities attached to the surface of the heat pipe through the annular sleeve, ensuring that the high-temperature fluid can directly contact the heat pipe and ensure normal heat exchange.

[0029] (3) This solution uses the bellows and the slider to cooperate with each other. When the bellows is squeezed, the high-temperature fluid in the bellows is discharged into the guide cavity through the drain valve, and then discharged along the pressure relief hole on the side wall of the guide cavity. At this time, the high-temperature fluid discharged from the pressure relief hole impacts the fluid that has completed heat exchange in the space between each heat conduction tube, thereby flushing the fluid that has completed heat exchange from the gap between the heat conduction tubes, so that the high-temperature fluid discharged from the pressure relief hole directly contacts the heat conduction tube, further improving the heat exchange effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the top view of the structure of the present invention;

[0031] Figure 2 It is a bottom view structural schematic diagram of the present invention;

[0032] Figure 3 This is a schematic diagram of the combined structure of the bracket and the housing of the present invention;

[0033] Figure 4 This is a schematic diagram of the combined structure of the bracket, heat pipe, and connecting frame of the present invention;

[0034] Figure 5 This is a front cross-sectional structural diagram of the present invention;

[0035] Figure 6 For the present invention Figure 5 Schematic diagram of the enlarged structure at A in the middle;

[0036] Figure 7 For the present invention Figure 5 Schematic diagram of the enlarged structure at B in the middle;

[0037] Figure 8 For the present invention Figure 5 Schematic diagram of the enlarged structure at C in the middle;

[0038] Figure 9 It is a schematic cross-sectional structural diagram of the bracket of the present invention.

[0039] Description of the numbers in the figure:

[0040] 1. Shell; 2. Reflux box; 3. Feed box; 4. Discharge box; 5. Bracket; 6. Heat pipe; 7. Ring sleeve; 8. Driving gear; 9. Driven gear; 10. Motor; 11. Mounting rod; 12. Reciprocating screw; 13. Slider; 14. Connecting frame; 15. Bellows; 1501. Inner tube; 1502. Outer tube; 16. Diversion chamber; 17. Pressure relief hole; 18. Cavity; 19. Water inlet valve; 20. Drain valve; 21. Conduit; 22. Stirring rod. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0042] Example 1:

[0043] See also Figures 1 to 9 A high-efficiency heat exchanger for petrochemical industry comprises a shell 1, wherein a liquid inlet and a liquid outlet are respectively opened on the side wall of the shell 1, the liquid inlet and the liquid outlet are located on the side wall of the shell 1 on opposite sides, and the liquid inlet is located below the liquid outlet;

[0044] The top of the shell 1 is provided with a reflux box 2, and the bottom of the shell 1 is provided with a feed box 3 and a discharge box 4;

[0045] Two cylindrical brackets 5 are vertically rotatably inserted on the inner bottom wall of the reflux box 2, and the bottom ends of the two brackets 5 extend to the inner top wall of the feed box 3 and the inner top wall of the discharge box 4 respectively;

[0046] A plurality of heat conducting pipes 6 are fixedly inserted on each bracket 5, and both ends of the heat conducting pipes 6 pass through the corresponding bracket 5;

[0047] First, hot fluid is injected into the shell 1 through the liquid inlet, and the liquid level of the hot fluid in the shell 1 gradually rises until the hot fluid is discharged through the liquid outlet.

[0048] At the same time, low-temperature fluid is injected into the feed box 3, and the low-temperature fluid in the feed box 3 flows into the reflux box 2 through the heat pipe 6 connected to the feed box 3, and then the fluid in the reflux box 2 flows into the discharge box 4 along the heat pipe 6 connected to the discharge box 4, and is finally discharged through the outlet on the discharge box 4.

[0049] Since the heat pipe 6 is located in the shell 1 , when the low-temperature fluid flows in the heat pipe 6 , the hot fluid in the shell 1 transfers heat to the low-temperature fluid in the heat pipe 6 through heat exchange.

[0050] The reflux box 2 is provided with a rotating mechanism for driving the bracket 5 to rotate;

[0051] The rotating mechanism drives the bracket 5 to rotate, thereby stirring the thermal fluid in the shell 1 to cause it to shake, thereby increasing the contact probability between the thermal fluid in the shell 1 and the heat pipe 6 and improving the heat exchange effect.

[0052] Each heat pipe 6 is movably provided with a circular sleeve 7 for scraping the outer wall of the heat pipe 6 , and each bracket 5 is provided with a driving mechanism for driving the corresponding circular sleeve 7 to reciprocate along the surface of the corresponding heat pipe 6 .

[0053] like Figure 5 As shown, the rotating mechanism includes a driving gear 8 and a driven gear 9 respectively fixedly mounted on the rotating shafts of the two brackets 5, the driven gear 9 is engaged with the driving gear 8, and a motor 10 for driving the driving gear 8 to rotate is fixedly mounted on the top wall of the reflux box 2, wherein the power output end of the motor 10 is fixedly connected to the rotating shaft of the driving gear 8.

[0054] During operation, the motor 10 is powered on, and the motor 10 drives the driven gear 9 to rotate together through the driving gear 8, thereby causing the two brackets 5 to rotate simultaneously.

[0055] like Figure 5 As shown, the driving mechanism includes mounting rods 11 which are respectively inserted into the inner bottom walls of the two brackets 5 for vertical rotation;

[0056] The bottom ends of the two mounting rods 11 are fixedly connected to the inner bottom wall of the corresponding feed box 3 and the inner bottom wall of the discharge box 4 respectively; when the bracket 5 rotates, the two mounting rods 11 can remain relatively stationary;

[0057] A reciprocating screw 12 is mounted on the top of each mounting rod 11, and a slider 13 is threadedly mounted on each of the two reciprocating screws 12; wherein, the slider 13 is threadedly mounted on the reciprocating screw 12, and when the reciprocating screw 12 is fixed, the slider 13 is rotated, and the slider 13 reciprocates along the reciprocating screw 12, which is a prior art and will not be described in detail;

[0058] A connecting frame 14 is fixedly mounted on the side wall of the slider 13, and the connecting frame 14 is fixedly connected to all the circular rings 7 on the corresponding bracket 5;

[0059] During operation, the bracket 5 drives the heat conducting tube 6 installed on the bracket 5 to rotate. At this time, the rotating heat conducting tube 6 drives the annular sleeve 7 sleeved on its outer wall to rotate together. At this time, under the action of the connecting frame 14, the slider 13 also rotates. At this time, the rotating slider 13 will reciprocate along the reciprocating screw 12, so that the connecting frame 14 and the annular sleeve 7 can be driven by the slider 13 to reciprocate on the surface of the corresponding heat conducting tube 6. At this time, the annular sleeve 7 scrapes the surface of the heat conducting tube 6, so as to scrape off impurities adhering to the surface of the heat conducting tube 6, so that the hot fluid can directly contact the heat conducting tube 6, thereby improving the heat exchange effect.

[0060] like Figure 5 、 Figure 6 As shown, the top wall and the bottom wall of the slider 13 are fixedly mounted with bellows 15, the bellows 15 are sleeved on the reciprocating screw 12, and the end of each bellows 15 away from the slider 13 is fixedly connected to the bracket 5. Since the reciprocating screw 12 is placed in the shell 1, by fixing the two ends of the bellows 15 to the slider 13 and the side wall of the bracket 5 respectively, it is possible to prevent the viscous high-temperature fluid in the shell 1 from adhering to the surface of the reciprocating screw 12, thereby ensuring that the slider 13 can move normally along the reciprocating screw 12.

[0061] like Figure 7 As shown, a guide cavity 16 is provided on the top wall and the bottom wall of the bracket 5, and a plurality of pressure relief holes 17 are provided on the side walls on adjacent sides of the two guide cavities 16, and a transfer mechanism is provided in the shell 1 for transferring the high-temperature fluid between the inner wall of the shell 1 and the outer wall of the bracket 5 to the guide cavity 16.

[0062] The bellows 15 includes an inner tube 1501 and an outer tube 1502. The outer tube 1502 is fixedly mounted on the outside of the inner tube 1501. The transfer mechanism includes a cavity 18 opened on the inner wall of the outer tube 1502. An inlet valve 19 and a drain valve 20 are embedded on the side wall of the cavity 18. The output end of the drain valve 20 is connected to the diversion cavity 16, and a conduit 21 is fixedly installed on the input end of the water inlet valve 19. The distance between the end of the conduit 21 away from the water inlet valve 19 and the inner wall of the shell 1 is 0.5-1 cm.

[0063] When the slider 13 reciprocates along the reciprocating screw 12 , the bellows 15 is intermittently stretched and squeezed.

[0064] When the bellows 15 is stretched, the cavity 18 absorbs high-temperature fluid from the space between the bracket 5 and the inner wall of the housing 1 through the water inlet valve 19 and the conduit 21 .

[0065] When the bellows 15 is squeezed, the high-temperature fluid in the bellows 15 is discharged into the guide cavity 16 through the drain valve 20, and then discharged along the pressure relief hole 17 on the side wall of the guide cavity 16. At this time, the high-temperature fluid discharged from the pressure relief hole 17 impacts the fluid that has completed heat exchange in the space between each heat conducting tube 6, thereby flushing the fluid that has completed heat exchange from the gap between the heat conducting tubes 6, so that the high-temperature fluid discharged from the pressure relief hole 17 directly contacts the heat conducting tube 6, further improving the heat exchange effect.

[0066] like Figure 4 、 Figure 5 As shown, stirring rods 22 are evenly fixed on the outer wall of the bracket 5. When the bracket 5 drives the stirring rods 22 to rotate, the stirring rods 22 stir the high-temperature fluid in the shell 1, further increasing the probability of the high-temperature fluid directly contacting the heat pipe 6.

[0067] like Figure 4 As shown, the bellows 15 is made of nickel-based high-temperature alloy material. Since the nickel-based high-temperature alloy material is resistant to high temperatures and corrosion, it plays a role in ensuring that the bellows 15 can work normally.

[0068] like Figure 1 As shown, the top and bottom walls of the annular sleeve 7 are both inclined, and the geometric shape of the inclined surface provides a more optimized "cut-in angle". When the inclined surface is inserted into the material, it can more effectively separate impurities from the outer wall of the heat pipe 6, reducing initial resistance.

[0069] like Figure 6 As shown, a through hole is opened on the bottom wall of the bracket 5, and the side walls of the mounting rod 11 and the through hole are both mirrored, and the mounting rod 11 is inserted into the through hole, so that the side walls of the mounting rod 11 can fit tightly with the side walls of the through hole to prevent the liquid in the shell 1 from mixing with the liquid in the feed box 3.

[0070] Usage method: First, inject hot fluid into the shell 1 through the liquid inlet, and the liquid level of the hot fluid in the shell 1 gradually rises until the hot fluid is discharged through the liquid outlet.

[0071] At the same time, low-temperature fluid is injected into the feed box 3, and the low-temperature fluid in the feed box 3 flows into the reflux box 2 through the heat pipe 6 connected to the feed box 3, and then the fluid in the reflux box 2 flows into the discharge box 4 along the heat pipe 6 connected to the discharge box 4, and is finally discharged through the outlet on the discharge box 4.

[0072] Since the heat pipe 6 is located in the shell 1 , when the low-temperature fluid flows in the heat pipe 6 , the hot fluid in the shell 1 transfers heat to the low-temperature fluid in the heat pipe 6 through heat exchange.

[0073] The rotating mechanism drives the bracket 5 to rotate, thereby stirring the thermal fluid in the shell 1 to cause it to shake, thereby increasing the contact probability between the thermal fluid in the shell 1 and the heat pipe 6 and improving the heat exchange effect.

[0074] During operation, the bracket 5 drives the heat conducting tube 6 mounted thereon to rotate. The rotating heat conducting tube 6 then drives the annular sleeve 7 sleeved on its outer wall to rotate together. Under the action of the connecting frame 14, the slider 13 also rotates. The rotating slider 13 then reciprocates along the reciprocating screw 12, thereby driving the connecting frame 14 and the annular sleeve 7 to reciprocate on the surface of the corresponding heat conducting tube 6. The annular sleeve 7 scrapes against the surface of the heat conducting tube 6, thereby cleaning away impurities adhering to the surface of the heat conducting tube 6 and allowing the hot fluid to directly contact the heat conducting tube 6, thereby improving the heat exchange effect. As the slider 13 reciprocates along the reciprocating screw 12, the bellows 15 is intermittently stretched and squeezed.

[0075] When the bellows 15 is stretched, the cavity 18 absorbs high-temperature fluid from the space between the bracket 5 and the inner wall of the housing 1 through the water inlet valve 19 and the conduit 21 .

[0076] When the bellows 15 is squeezed, the high-temperature fluid in the bellows 15 is discharged into the guide chamber 16 through the drain valve 20, and then discharged along the pressure relief hole 17 on the side wall of the guide chamber 16. At this time, the high-temperature fluid discharged from the pressure relief hole 17 impacts the fluid that has completed heat exchange in the space between each heat pipe 6, thereby flushing the fluid that has completed heat exchange from the gap between the heat pipes 6, so that the high-temperature fluid discharged from the pressure relief hole 17 directly contacts the heat pipe 6, further improving the heat exchange effect. The top and bottom walls of the annular sleeve 7 are both inclined surfaces, and the geometric shape of the inclined surface provides a more optimized "cut-in angle". When the inclined surface is inserted into the material, the inclined surface can more effectively separate impurities from the outer wall of the heat pipe 6, reducing initial resistance.

[0077] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A high-efficiency heat exchanger for petrochemical industry, comprising a shell (1); Its characteristics are: The top end of the shell (1) is provided with a reflux box (2), and the bottom end of the shell (1) is provided with a feed box (3) and a discharge box (4); Two cylindrical brackets (5) are vertically rotatably inserted on the inner bottom wall of the reflux box (2), and the bottom ends of the two brackets (5) extend to the inner top wall of the feed box (3) and the inner top wall of the discharge box (4) respectively; A plurality of heat conducting pipes (6) are fixedly inserted on each of the brackets (5), and both ends of the heat conducting pipes (6) pass through the corresponding brackets (5); The reflux box (2) is provided with a rotating mechanism for driving the bracket (5) to rotate; Each heat-conducting tube (6) is movably provided with a circular sleeve (7), and the circular sleeve (7) is used to scrape the outer wall of the heat-conducting tube (6). Each bracket (5) is provided with a driving mechanism for driving the corresponding circular sleeve (7) to perform reciprocating motion along the surface of the corresponding heat-conducting tube (6).

2. The high-efficiency heat exchanger for petrochemical industry according to claim 1, characterized in that: The rotating mechanism comprises a driving gear (8) and a driven gear (9) respectively fixedly mounted on the rotating shafts of the two brackets (5); the driven gear (9) is meshed with the driving gear (8); and a motor (10) for driving the driving gear (8) to rotate is fixedly mounted on the top wall of the reflux box (2).

3. The high-efficiency heat exchanger for petrochemical industry according to claim 2, characterized in that: The driving mechanism comprises mounting rods (11) respectively inserted vertically and rotatably on the inner bottom walls of the two brackets (5); The bottom ends of the two mounting rods (11) are fixedly connected to the inner bottom wall of the corresponding feed box (3) and the inner bottom wall of the discharge box (4); A reciprocating screw (12) is installed at the top end of each mounting rod (11), and a slider (13) is threadedly installed on each of the two reciprocating screws (12); A connecting frame (14) is fixedly mounted on the side wall of the slider (13), and the connecting frame (14) is fixedly connected to all the annular sleeves (7) on the corresponding bracket (5).

4. The high-efficiency heat exchanger for petrochemical industry according to claim 3, characterized in that: The top wall and the bottom wall of the slider (13) are both fixedly mounted with bellows (15), the bellows (15) are sleeved on the reciprocating screw (12), and one end of each bellows (15) away from the slider (13) is fixedly connected to the bracket (5).

5. The high-efficiency heat exchanger for petrochemical industry according to claim 4, characterized in that: A flow guide cavity (16) is provided on the top wall and the bottom wall of the bracket (5), a plurality of pressure relief holes (17) are provided on the side walls of the two adjacent sides of the flow guide cavities (16), and a transfer mechanism for transferring the high-temperature fluid between the inner wall of the shell (1) and the outer wall of the bracket (5) to the flow guide cavity (16) is provided in the shell (1).

6. The high-efficiency heat exchanger for petrochemical industry according to claim 5, characterized in that: The bellows (15) comprises an inner tube (1501) and an outer tube (1502), wherein the outer tube (1502) is fixedly sleeved on the outside of the inner tube (1501), and the transfer mechanism comprises a cavity (18) provided on the inner side wall of the outer tube (1502), wherein a water inlet valve (19) and a water drain valve (20) are embedded on the side wall of the cavity (18), wherein the output end of the water drain valve (20) is communicated with the diversion cavity (16), and a conduit (21) is fixedly installed on the input end of the water inlet valve (19), and the distance between the end of the conduit (21) away from the water inlet valve (19) and the inner wall of the housing (1) is 0.5-1 cm.

7. The high-efficiency heat exchanger for petrochemical industry according to claim 6, characterized in that: Stirring rods (22) are evenly fixedly mounted on the outer side wall of the bracket (5).

8. The high-efficiency heat exchanger for petrochemical industry according to claim 7, characterized in that: The bellows (15) is made of nickel-based high-temperature alloy material.

9. The high-efficiency heat exchanger for petrochemical industry according to claim 1, characterized in that: The top wall and the bottom wall of the circular ring sleeve (7) are both inclined surfaces.

10. The high-efficiency heat exchanger for petrochemical industry according to claim 3, characterized in that: A through hole is provided on the bottom wall of the bracket (5); the mounting rod (11) and the side wall of the through hole are both mirror surfaces, and the mounting rod (11) is inserted into the through hole.

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