High-flux tube heat exchanger convenient to adjust

Abstract

A high-flux tube heat exchanger convenient to adjust relates to the technical field of tubular heat exchangers and comprises a shell, tube boxes are arranged at the two ends of the shell, annular plates are arranged between the shell and the tube boxes, the shell, the tube boxes and the annular plates are detachably connected, tube plates are detachably arranged at the ends of the annular plates, and a plurality of liquid passing tubes which are arranged in a penetrating mode are fixedly arranged at the ends of the tube plates. A fixed circular plate is fixedly arranged at the end of the tube plate, a plurality of adjusting plates slidably arranged in the radial direction of the fixed circular plate are evenly distributed at the end of the fixed circular plate in the circumferential direction, the sliding distances of the adjusting plates are sequentially increased from inside to outside, a plurality of receding grooves are formed in the end of the fixed circular plate in a penetrating mode, and liquid through holes are formed in the ends of the adjusting plates in a penetrating mode. A threaded pipe in threaded connection with the liquid through hole is arranged at one end of the adjusting plate, the threaded pipe penetrates through the receding groove and communicates with the liquid through pipe through a metal corrugated hose, and an adjusting pipe communicating with the liquid through hole is detachably arranged at the other end of the adjusting plate. The tubular heat exchanger solves the problem that the distance between heat exchange tubes of an existing tubular heat exchanger cannot be adjusted, so that the use adaptability is poor.

Description

Technical Field

[0001] The present invention relates to the technical field of tubular heat exchangers, and specifically to a high-flux tube heat exchanger that is convenient for adjustment. Background Art

[0002] A tubular heat exchanger is a device that realizes heat exchange between two fluids through a tube bundle and a shell structure, belonging to a shell-and-tube heat exchanger. One of the fluids flows inside the heat exchange tubes, and the other fluid flows between the tubes and the shell outside the tubes. The two fluids achieve heat exchange through the combined action of heat conduction and convection through the tube wall. A high-flux tube heat exchanger is a tubular heat exchanger that significantly improves the heat transfer efficiency through special surface treatment or structural design. Its core feature is that under the same volume or the same heat exchange area, the heat transfer coefficient is much higher than that of ordinary heat exchange tubes, and it is suitable for occasions that require efficient heat exchange, such as the chemical industry, petroleum, electric power, refrigeration and other fields.

[0003] The distance between adjacent heat exchange tubes in a tubular heat exchanger is one of the key parameters in the design, which has a significant impact on heat exchange effect, flow resistance, pressure drop and fouling tendency, etc. In the design of traditional tubular heat exchangers, the heat exchange tubes and tube sheets are usually connected by expansion joints or welding, so the distance between the heat exchange tubes is fixed. Although this characteristic simplifies the structure and reduces the manufacturing cost, it also brings significant problems of insufficient adaptability. Specifically, because the distance between the heat exchange tubes is fixed, the performance of the heat exchanger can only reach the optimum under specific working conditions. In actual operation, changes in fluid properties (such as viscosity, solid content) or process conditions (such as flow rate, temperature) will lead to a decrease in heat transfer efficiency, an increase in pressure drop or rapid fouling accumulation, etc. For example: High-viscosity fluids (such as heavy oil, polymer melt) have high flow resistance and increased energy consumption when flowing at a fixed small distance; Fouling-prone media (such as seawater, slurry) will cause fouling deposition between the tube bundles at a small distance; A variable-condition system (such as a heating system with seasonal load fluctuations) will be in an inefficient operation state for a long time because it cannot adjust the tube distance according to the load state. This rigid design limits the flexibility and long-term economy of tubular heat exchangers. Especially in industries such as chemical industry, petroleum, and food, where the working conditions are complex and changeable, heat exchangers with fixed distances often need to be additionally equipped with auxiliary equipment to make up for performance defects.

[0004] In summary, it is obvious that the existing technology has inconveniences and defects in actual use, so it is necessary to improve it. Summary of the Invention

[0005] Aiming at the defects in the prior art, the technical problem to be solved by the present invention is to provide a high-throughput tube heat exchanger that is easy to adjust. This heat exchanger can adjust the spacing of the heat exchange tubes according to fluid parameters or process requirements, etc. This adaptive adjustment mechanism enables the heat exchanger to always maintain the best working state. Compared with the design of fixed spacing of heat exchange tubes in traditional heat exchangers, the heat transfer efficiency of this heat exchanger is greatly improved. At the same time, it effectively avoids the problem of performance attenuation caused by working condition fluctuations, and can significantly delay the fouling deposition by adjusting the spacing of the heat exchange tubes, greatly extending the maintenance cycle. Therefore, this tubular heat exchanger has strong adaptability and comprehensive performance.

[0006] To solve the above problems, the present invention provides the following technical solutions: A high-throughput tube heat exchanger that is easy to adjust, including a shell. Both ends of the shell are provided with tube boxes. An annular plate is provided between the shell and the tube boxes. The shell, the tube boxes and the annular plate are detachably connected. The end of the annular plate is detachably provided with a tube sheet. The end of the tube sheet is fixedly provided with a number of liquid-passing tubes arranged through. The end of the tube sheet is fixedly provided with a fixed circular plate. A number of adjusting plates slidably arranged along its radial direction are circumferentially distributed at the end of the fixed circular plate. The sliding distance of the adjusting plates increases sequentially from inside to outside. A number of avoiding grooves are provided through the end of the fixed circular plate. The end of the adjusting plate is provided with a liquid-passing hole. One end of the adjusting plate is provided with a threaded tube threadedly connected to the liquid-passing hole. The threaded tube passes through the avoiding groove and is connected to the liquid-passing tube through a metal corrugated hose. The other end of the adjusting plate is detachably provided with an adjusting tube communicated with the liquid-passing hole. A number of heat exchange tubes are arranged inside the shell. Both ends of the heat exchange tubes are detachably connected to the adjusting tubes. The lower outer walls of the shell and one of the tube boxes are both fixedly communicated with a liquid inlet tube. The upper outer walls of the shell and the other tube box are both fixedly communicated with a liquid discharge tube.

[0007] As an optimized scheme, two adjusting circular plates that move towards or away from each other are arranged inside the shell. A number of avoiding holes are provided through the end of the adjusting circular plates. The adjusting tubes are located in the avoiding holes. Two driven wedge-shaped blocks are welded on the outer wall of the adjusting tubes. A number of driving wedge-shaped blocks are detachably provided at the end of the adjusting circular plates. The inclined surface ends of the driving wedge-shaped blocks are slidably connected to the inclined surface ends of the driven wedge-shaped blocks. The inclination angles of the inclined surface ends of the driving wedge-shaped blocks increase sequentially from inside to outside.

[0008] As an optimized scheme, a driving shaft rotatably arranged along the horizontal line is provided inside the shell. Two lead screw sections are provided on the driving shaft. The rotation directions of the two lead screw sections are opposite. A lead screw nut is sleeved on the lead screw section. The lead screw nut is detachably connected to the adjusting circular plate.

[0009] As an optimized solution, several fixed columns and sliding columns are respectively and fixedly arranged at the opposite ends of the fixed circular plate and the adjusting circular plate, and one end of the sliding column extends into the fixed column and is slidably connected to the fixed column.

[0010] As an optimized solution, both ends of the driving shaft are correspondingly rotatably connected to two tube sheets. A servo motor is fixedly arranged at one end of the tube box. One end of the driving shaft sequentially passes through the tube sheet and the tube box and is fixedly connected to the output end of the servo motor. The driving shaft is rotationally and sealingly connected to the tube sheet and the tube box through mechanical seals.

[0011] As an optimized solution, the fixed circular plate is fixedly connected to the tube sheet through several connecting columns.

[0012] As an optimized solution, one end of the adjusting tube is fixedly connected with a fixed flange, and the other end of the adjusting tube is provided with a threaded flange threadedly connected thereto. Both ends of the heat exchange tube are fixedly connected with connecting flanges. The fixed flange is detachably connected to the adjusting plate through bolts, and the threaded flange is detachably connected to the connecting flange through bolts and nuts.

[0013] As an optimized solution, the shell, the tube box and the annular plate are detachably connected through bolts and nuts, and the annular plate is detachably connected to the tube sheet through bolts.

[0014] As an optimized solution, both the driving wedge block and the lead screw nut are detachably connected to the adjusting circular plate through bolts.

[0015] As an optimized solution, both ends of the metal corrugated hose are correspondingly threadedly connected to the liquid conducting pipe and the threaded pipe.

[0016] Compared with the prior art, the beneficial effects of the present invention are: When the device is running, one of the fluids enters through the liquid inlet pipe on the tube sheet. This fluid passes through the liquid passage pipe, the metal corrugated hose, the threaded pipe, the adjusting pipe and the heat exchange pipe and enters into another tube sheet and is discharged through the liquid discharge pipe on the tube sheet. At the same time, the other fluid enters through the liquid inlet pipe on the shell. This fluid passes through the inside of the shell and is discharged through the liquid discharge pipe on the shell. The two fluids achieve heat exchange through the heat conduction of the heat exchange pipe. When changes occur in fluid parameters or process requirements, etc., and the spacing of the heat exchange pipes needs to be adjusted, the servo motor drives the drive shaft to rotate, and then drives the two adjusting circular plates to move towards or away from each other. When the two adjusting circular plates move away from each other, the driving wedge block moves towards the direction close to the driven wedge block, and then drives the adjusting pipe, the adjusting plate and the heat exchange pipe to move outwards. The inclination angle of the inclined end of the driving wedge block increases sequentially from the inside to the outside. Therefore, the radial movement distance of the outer heat exchange pipe is greater than that of the inner heat exchange pipe, and then the function of expanding the radial spacing and the circumferential spacing of the heat exchange pipes is realized. On the contrary, when the two adjusting circular plates move towards each other, the radial spacing and the circumferential spacing of the heat exchange pipes are reduced. This heat exchanger can adjust the spacing of the heat exchange pipes according to fluid parameters or process requirements, etc. This adaptive adjustment mechanism enables the heat exchanger to always maintain the best working state. Compared with the design of the fixed spacing of the heat exchange pipes in the traditional heat exchanger, the heat transfer efficiency of this heat exchanger is greatly improved, and at the same time, the problem of performance attenuation caused by working condition fluctuations is effectively avoided. And by adjusting the spacing of the heat exchange pipes, the fouling deposition can be significantly delayed, and the maintenance period is greatly extended. Therefore, this tubular heat exchanger has strong adaptability and comprehensive performance. Brief Description of the Drawings

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts do not necessarily draw according to the actual scale.

[0018] Figure 1 It is a schematic structural diagram of the present invention; Figure 2 It is a schematic structural diagram of the inside of one end of the shell of the present invention; Figure 3 It is a side cross-sectional view between the tube sheet and the adjusting circular plate of the present invention; Figure 4 It is a schematic structural diagram of the end of the adjusting plate of the present invention; Figure 5 It is a schematic structural diagram between the tube sheet and the fixed circular plate of the present invention; Figure 6 It is a schematic structural diagram of one end of the adjusting circular plate of the present invention; Figure 7 It is a schematic structural diagram of the other end of the adjusting circular plate of the present invention; Figure 8 This is a schematic structural diagram of the driving wedge block and the driven wedge block of the present invention; Figure 9 This is a schematic structural diagram of the whole of the present invention; Figure 10 This is a schematic structural diagram of both ends of the adjusting pipe of the present invention.

[0019] In the figure: 1 - housing; 2 - adjusting circular plate; 3 - annular plate; 4 - tube sheet box; 5 - connecting column; 6 - tube sheet; 7 - liquid inlet pipe; 8 - fixed circular plate; 9 - fixed column; 10 - sliding column; 11 - servo motor; 12 - mechanical seal; 13 - liquid discharge pipe; 14 - heat exchange tube; 15 - liquid passing pipe; 16 - metal corrugated hose; 17 - threaded pipe; 18 - avoiding groove; 19 - adjusting plate; 20 - avoiding hole; 21 - fixed flange; 22 - driven wedge block; 23 - adjusting pipe; 24 - threaded flange; 25 - connecting flange; 26 - driving wedge block; 27 - driving shaft; 28 - lead screw section; 29 - lead screw nut; 30 - liquid passing hole. Specific embodiments

[0020] The embodiments of the technical solution of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, so they are only examples and cannot be used to limit the protection scope of the present invention.

[0021] As Figures 1 to 10 shown, a high-throughput tube heat exchanger that is easy to adjust includes a housing 1. Tube sheet boxes 4 are provided at both ends of the housing 1. An annular plate 3 is provided between the housing 1 and the tube sheet boxes 4. The housing 1, the tube sheet boxes 4 and the annular plate 3 are detachably connected. A tube sheet 6 is detachably provided at the end of the annular plate 3. A plurality of liquid passing pipes 15 penetrating through are fixedly provided at the end of the tube sheet 6. A fixed circular plate 8 is fixedly provided at the end of the tube sheet 6. A plurality of adjusting plates 19 slidably arranged along its radial direction are circumferentially distributed at the end of the fixed circular plate 8. The sliding distance of the adjusting plates 19 increases sequentially from the inside to the outside. A plurality of avoiding grooves 18 are penetrated through at the end of the fixed circular plate 8. Liquid passing holes 30 are penetrated through at the end of the adjusting plates 19. One end of the adjusting plate 19 is provided with a threaded pipe 17 threadedly connected to the liquid passing hole 30. The threaded pipe 17 penetrates through the avoiding groove 18 and is connected to the liquid passing pipe 15 through a metal corrugated hose 16. The other end of the adjusting plate 19 is detachably provided with an adjusting pipe 23 communicated with the liquid passing hole 30. A plurality of heat exchange tubes 14 are provided inside the housing 1. Both ends of the heat exchange tubes 14 are detachably connected to the adjusting pipes 23. Liquid inlet pipes 7 are fixedly communicated with the lower outer walls of the housing 1 and one of the tube sheet boxes 4. Liquid discharge pipes 13 are fixedly communicated with the upper outer walls of the housing 1 and the other tube sheet box 4.

[0022] Inside the housing 1, there are two adjusting circular plates 2 that move towards or away from each other. A number of avoidance holes 20 are provided through the ends of the adjusting circular plates 2. The adjusting tube 23 is located within the avoidance holes 20. Two driven wedge blocks 22 are welded to the outer wall of the adjusting tube 23. A number of driving wedge blocks 26 are detachably provided at the ends of the adjusting circular plates 2. The inclined surface ends of the driving wedge blocks 26 are slidably connected to the inclined surface ends of the driven wedge blocks 22. The inclination angles of the inclined surface ends of the driving wedge blocks 26 increase sequentially from the inside out (such as Figure 8 , α > β).

[0023] Inside the housing 1, there is a driving shaft 27 rotatably provided along the horizontal line. There are two lead screw sections 28 on the driving shaft 27. The helix directions of the two lead screw sections 28 are opposite. A lead screw nut 29 is sleeved on the lead screw section 28. The lead screw nut 29 is detachably connected to the adjusting circular plate 2.

[0024] A number of fixing columns 9 and sliding columns 10 are respectively fixedly provided at the opposite ends of the fixing circular plate 8 and the adjusting circular plate 2. One end of the sliding column 10 extends into the fixing column 9 and is slidably connected to the fixing column 9.

[0025] Both ends of the driving shaft 27 are rotatably connected to two tube plates 6 correspondingly. One end of a tube box 4 is fixedly provided with a servo motor 11. One end of the driving shaft 27 sequentially passes through the tube plate 6 and the tube box 4 and is fixedly connected to the output end of the servo motor 11. The driving shaft 27 is rotationally and hermetically connected to the tube plate 6 and the tube box 4 through a mechanical seal 12.

[0026] The fixing circular plate 8 is fixedly connected to the tube plate 6 through a number of connecting columns 5.

[0027] One end of the adjusting tube 23 is fixedly connected with a fixing flange 21. The other end of the adjusting tube 23 is provided with a threaded flange 24 threadedly connected thereto. Both ends of the heat exchange tube 14 are fixedly connected with connecting flanges 25. The fixing flange 21 is detachably connected to the adjusting plate 19 through bolts. The threaded flange 24 is detachably connected to the connecting flange 25 through bolts and nuts.

[0028] The housing 1, the tube box 4 and the annular plate 3 are detachably connected through bolts and nuts. The annular plate 3 is detachably connected to the tube plate 6 through bolts.

[0029] Both the driving wedge blocks 26 and the lead screw nuts 29 are detachably connected to the adjusting circular plate 2 through bolts.

[0030] Both ends of the metal corrugated hose 16 are threadedly connected to the liquid - conducting pipe 15 and the threaded pipe 17 correspondingly.

[0031] The working principle of this device is as follows: When the device is operating, one of the fluids enters through the liquid inlet pipe 7 on the tube box 4. This fluid passes through the liquid passing pipe 15, the metal corrugated hose 16, the threaded pipe 17, the adjusting pipe 23 and the heat exchange pipe 14 and enters into another tube box 4 and is discharged through the liquid discharge pipe 13 on the tube box 4. At the same time, the other fluid enters through the liquid inlet pipe 7 on the shell 1. This fluid passes through the inside of the shell 1 and is discharged through the liquid discharge pipe 13 on the shell 1. The two fluids achieve heat exchange through the heat conduction of the heat exchange pipe 14. When changes occur in fluid parameters or process requirements, etc., and the spacing of the heat exchange pipe 14 needs to be adjusted, the servo motor 11 drives the drive shaft 27 to rotate, thereby driving the two adjusting circular plates 2 to move towards or away from each other. When the two adjusting circular plates 2 move away from each other, the driving wedge block 26 moves towards the direction close to the driven wedge block 22, thereby driving the adjusting pipe 23, the adjusting plate 19 and the heat exchange pipe 14 to move outwards. The inclination angle of the inclined surface end of the driving wedge block 26 increases sequentially from the inside to the outside. Therefore, the radial movement distance of the outer heat exchange pipe 14 is greater than that of the inner heat exchange pipe 14, thereby realizing the function of expanding the radial spacing and the circumferential spacing of the heat exchange pipe 14. On the contrary, when the two adjusting circular plates 2 move towards each other, the radial spacing and the circumferential spacing of the heat exchange pipe 14 are reduced. This heat exchanger can adjust the spacing of the heat exchange pipe 14 according to fluid parameters or process requirements, etc. This adaptive adjustment mechanism enables the heat exchanger to always maintain the best working state. Compared with the design of the fixed spacing of the heat exchange pipe 14 in the traditional heat exchanger, the heat transfer efficiency of this heat exchanger is greatly improved, and at the same time, the problem of performance attenuation caused by working condition fluctuations is effectively avoided. And by adjusting the spacing of the heat exchange pipe 14, the fouling deposition can be significantly delayed, and the maintenance period is greatly extended. Therefore, this tubular heat exchanger has strong adaptability and comprehensive performance.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

Claims

1. A high flux tube heat exchanger that is easy to adjust, characterized in that: The invention comprises a shell (1), both ends of the shell (1) are provided with a tube box (4), an annular plate (3) is provided between the shell (1) and the tube box (4), the shell (1), the tube box (4) and the annular plate (3) are detachably connected, the end of the annular plate (3) is detachably provided with a tube plate (6), the end of the tube plate (6) is fixedly provided with a plurality of liquid-passing tubes (15) penetrating therethrough, the end of the tube plate (6) is fixedly provided with a fixed circular plate (8), the end of the fixed circular plate (8) is uniformly provided with a plurality of adjustment plates (19) slidably arranged along its radial direction, the sliding distance of the adjustment plate (19) increases from the inside to the outside, the end of the fixed circular plate (8) is penetrated by a plurality of avoidance grooves (18), the end of the adjustment plate (19) is penetrated by a plurality of A liquid through hole (30) is provided, one end of the regulating plate (19) is provided with a threaded tube (17) threadedly connected to the liquid through hole (30), the threaded tube (17) passes through the avoidance groove (18) and is connected to the liquid through pipe (15) through a metal corrugated hose (16), the other end of the regulating plate (19) is detachably provided with an regulating tube (23) connected to the liquid through hole (30), a plurality of heat exchange tubes (14) are provided inside the shell (1), both ends of the heat exchange tubes (14) are detachably connected to the regulating tube (23), the shell (1) and the lower outer wall of one of the tube boxes (4) are both fixedly connected and provided with a liquid inlet pipe (7), and the shell (1) and the upper outer wall of the other tube box (4) are both fixedly connected and provided with a liquid discharge pipe (13).

2. The easily adjustable high flux tube heat exchanger according to claim 1, characterized in that: Two adjusting circular plates (2) are arranged inside the housing (1) to be movable toward or away from each other. A plurality of avoidance holes (20) are penetrated through the ends of the adjusting circular plates (2). The adjusting tube (23) is located in the avoidance holes (20). Two driven wedge blocks (22) are welded to the outer wall of the adjusting tube (23). A plurality of driving wedge blocks (26) are detachably provided at the ends of the adjusting circular plates (2). The inclined surfaces of the driving wedge blocks (26) are slidably connected to the inclined surfaces of the driven wedge blocks (22). The inclination angles of the inclined surfaces of the driving wedge blocks (26) increase from the inside to the outside.

3. The easily adjustable high flux tube heat exchanger according to claim 2, characterized in that: A drive shaft (27) is arranged in the housing (1) to rotate along a horizontal line. Two screw rod sections (28) are arranged on the drive shaft (27). The two screw rod sections (28) rotate in opposite directions. A screw rod nut (29) is sleeved on the screw rod section (28). The screw rod nut (29) is detachably connected to the adjusting circular plate (2).

4. The easily adjustable high flux tube heat exchanger according to claim 3, characterized in that: A plurality of fixed columns (9) and sliding columns (10) are respectively fixedly provided at the facing ends of the fixed circular plate (8) and the adjusting circular plate (2); one end of the sliding column (10) extends into the fixed column (9) and is slidably connected to the fixed column (9).

5. The easily adjustable high flux tube heat exchanger according to claim 3, characterized in that: The two ends of the drive shaft (27) are rotatably connected to the two tube sheets (6) respectively, a servo motor (11) is fixedly provided at the end of one of the tube boxes (4), one end of the drive shaft (27) passes through the tube sheet (6) and the tube box (4) in sequence and is fixedly connected to the output end of the servo motor (11), and the drive shaft (27) is rotatably sealed with the tube sheet (6) and the tube box (4) via a mechanical seal (12).

6. The easily adjustable high flux tube heat exchanger according to claim 1, characterized in that: The fixed circular plate (8) is fixedly connected to the tube plate (6) via a plurality of connecting columns (5).

7. The easily adjustable high flux tube heat exchanger according to claim 1, characterized in that: One end of the regulating tube (23) is fixedly connected to a fixed flange (21), and the other end of the regulating tube (23) is provided with a threaded flange (24) threadedly connected thereto. Both ends of the heat exchange tube (14) are fixedly connected to connecting flanges (25), the fixed flange (21) is detachably connected to the regulating plate (19) by bolts, and the threaded flange (24) is detachably connected to the connecting flange (25) by bolts and nuts.

8. The easily adjustable high flux tube heat exchanger according to claim 1, characterized in that: The shell (1), the tube box (4) and the annular plate (3) are detachably connected via bolts and nuts, and the annular plate (3) is detachably connected to the tube plate (6) via bolts.

9. The easily adjustable high flux tube heat exchanger according to claim 3, characterized in that: The driving wedge block (26) and the screw nut (29) are both detachably connected to the adjusting circular plate (2) via bolts.

10. The easily adjustable high flux tube heat exchanger according to claim 1, characterized in that: The two ends of the metal corrugated hose (16) are correspondingly threadedly connected to the liquid passage pipe (15) and the threaded pipe (17).

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