Two-phase flow uniform distribution plate-fin heat exchanger

Abstract

The invention belongs to the technical field of plate-fin heat exchangers, and discloses a two-phase flow uniform distribution plate-fin heat exchanger which comprises a heat exchanger body, a feeding pipe and a discharging pipe are installed on the side wall of the heat exchanger body, a separation assembly is arranged in the discharging pipe and comprises a filter plate arranged in the discharging pipe, and a partition plate is fixedly installed at the top end of the filter plate. When a gas-liquid two-phase mixture is discharged out of the device, the gas-liquid mixture makes contact with the filter plate and is buffered and separated through the filter plate, gas flows upwards and is discharged upwards through the exhaust holes, and liquid is directly discharged after passing through the filter plate. And the size of the gas-liquid separation device is reduced, and the pressure drop can be further reduced, so that the heat exchange efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of plate-fin heat exchangers, and in particular relates to a two-phase flow uniformly distributed plate-fin heat exchanger. Background Art

[0002] The plate-fin heat exchanger is a heat exchanger that uses flat plates and fins as heat transfer elements. It is mainly composed of plate bundles and heads. The two-phase uniform plate-fin heat exchanger is a high-efficiency heat exchange equipment used to process gas-liquid two-phase fluids. It is widely used in chemical, energy, refrigeration and other fields. Its core design is to optimize fluid distribution and heat transfer performance and improve heat exchange efficiency through the combination of uniformly distributed plates and fins.

[0003] After searching, such as patent: CN220062679U, a plate-fin heat exchanger with gas-liquid separation function, includes a plate-fin heat exchanger body and two support plates, two separation devices are arranged in the plate-fin heat exchanger body, and the back of the inner wall of the plate-fin heat exchanger body is clamped with a second support bearing. The plate-fin heat exchanger with gas-liquid separation function is provided with a separation device, a rotating shaft, a control disk, an adjustment disk, a control block, a support plate, a support rod and a motor, so that the adjustment disk moves up and down along the surface of the control disk, thereby driving the control block to move along the movement trajectory of the adjustment disk, and then adjusting the position of the support plate, so that the support plate drives the support rod to move, thereby driving the two separation devices to vibrate, so that the separation device can separate the heat exchange fluid into gas and liquid, avoid the liquid staying in the separation device, and can perform multi-stage separation at the same time, thereby improving the separation efficiency;

[0004] In the current two-phase flow uniformly distributed plate-fin heat exchanger, gas and liquid are discharged from the same outlet and then separated by a separation device. However, the current gas-liquid separation device occupies a large space and often produces a large pressure drop during the heat exchange process, affecting the overall performance of the heat exchanger. Summary of the invention

[0005] The object of the present invention is to provide a two-phase flow uniformly distributed plate-fin heat exchanger to solve the problems raised in the above background technology.

[0006] In order to achieve the above object, the present invention provides the following technical solution: a two-phase flow uniformly distributed plate-fin heat exchanger, comprising a heat exchanger body, a feed pipe and a discharge pipe are installed on the side wall of the heat exchanger body, and a separation component is arranged inside the discharge pipe;

[0007] The separation assembly comprises a filter plate arranged inside the discharge pipe, a partition is fixedly mounted on the top of the filter plate, and exhaust holes are evenly opened on the inner wall of the partition.

[0008] As a further technical solution of the present invention, a buffer plate is evenly arranged on one side of the filter plate, and the buffer plate is fixedly installed on the bottom end of the partition.

[0009] As a further technical solution of the present invention, the buffer plates are distributed inclined outwards.

[0010] As a further technical solution of the present invention, water-absorbent cotton is arranged above the partition, and the water-absorbent cotton is installed on the inner wall of the discharge pipe.

[0011] As a further technical solution of the present invention, a rotating disk is fixedly installed at one end of the absorbent cotton, and the rotating disk is rotatably installed on the inner wall of the discharge pipe. The side of the rotating disk away from the absorbent cotton is fixedly connected to a first rotating shaft, the outer wall of the first rotating shaft is fixedly connected to a first gear, the bottom end of the first gear is meshed with a rack plate, the inner wall of the rack plate is threadedly connected to a reciprocating screw, one end of the reciprocating screw is fixedly connected to a second gear, the bottom end of the second gear is meshed with a third gear, the inner wall of the third gear is fixedly installed with a second rotating shaft, and a motor is provided at one end of the second rotating shaft.

[0012] As a further technical solution of the present invention, a plurality of the absorbent cottons are evenly arranged, and the plurality of the absorbent cottons are located on the same horizontal plane.

[0013] As a further technical solution of the present invention, a coil spring is installed on the outer wall of the first rotating shaft.

[0014] As a further technical solution of the present invention, the inner wall diameter of the second gear is ten N times the inner wall diameter of the third gear, and N is a positive integer.

[0015] As a further technical solution of the present invention, a second pulley group is installed on the outer wall of the second rotating shaft, a fourth rotating shaft is installed on the bottom of the second pulley group, one end of the fourth rotating shaft is fixedly connected to the first bevel gear, one side of the first bevel gear is meshed with the second bevel gear, one side of the second bevel gear is fixedly installed with a third rotating shaft, and a cam is fixedly installed on the outer wall of the third rotating shaft.

[0016] As a further technical solution of the present invention, the third rotating shafts are arranged around the inner wall of the discharge pipe, and each of the third rotating shafts is driven by a first pulley set.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The present invention contacts the gas-liquid two-phase mixture through the filter plate. When the gas-liquid two-phase mixture is discharged from the device, the gas-liquid mixture contacts the filter plate and is buffered and separated by the filter plate. The gas flows upward and is discharged upward through the exhaust hole, and the liquid is directly discharged after passing through the filter plate, thereby achieving the effect of gas-liquid separation. The gas-liquid separation device provided in the device reduces the volume and can further reduce the pressure drop, thereby improving the heat exchange efficiency.

[0019] 2. The present invention is arranged to twist the absorbent cotton. During the gas-liquid separation process, the motor is started to drive the second rotating shaft to rotate. The rotation of the second rotating shaft drives the rotation of the third gear. The rotation of the third gear drives the rotation of the second gear. The rotation of the second gear drives the rotation of the reciprocating screw. The rotation of the reciprocating screw drives the movement of the rack plate. The movement of the rack plate drives the rotation of the first gear. The rotation of the first gear drives the rotation of the first rotating shaft. The rotation of the first rotating shaft drives the rotation of the rotating disk. The rotation of the rotating disk drives the rotation of the absorbent cotton, which helps to screw out the water inside the absorbent cotton, so that the absorbent cotton can restore its water absorption capacity and extend its service life.

[0020] 3. The present invention uses a cam to knock on the inner wall of the discharge pipe. When the second rotating shaft rotates, the fourth rotating shaft is driven to rotate through the second pulley group. The rotation of the fourth rotating shaft drives the rotation of the first bevel gear. The rotation of the first bevel gear drives the rotation of the second bevel gear. The rotation of the second bevel gear drives the rotation of the third rotating shaft. The rotation of the third rotating shaft drives the rotation of the cam, so that the third rotating shaft knocks on the inner wall of the discharge pipe to generate vibration, which helps to break the droplets or bubbles in the gas-liquid mixture and promote the separation of the gas-liquid two phases. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the structural cross section of the discharge pipe of the present invention;

[0023] Figure 3 It is a front view of the structure section of the discharge pipe of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the third rotating shaft and the cam of the present invention;

[0025] Figure 5 For the present invention Figure 4 A schematic diagram of the structure enlargement in the middle;

[0026] Figure 6 This is a schematic diagram of the structure of the water-absorbing cotton of the present invention;

[0027] Figure 7 It is a structural schematic diagram of the rack plate of the present invention.

[0028] In the figure: 1. heat exchanger body; 2. feed pipe; 3. discharge pipe; 4. filter plate; 5. partition; 6. exhaust hole; 7. buffer plate; 8. absorbent cotton; 9. rotating disk; 10. first rotating shaft; 11. first gear; 12. coil spring; 13. rack plate; 14. reciprocating screw; 15. second gear; 16. third gear; 17. second rotating shaft; 18. motor; 19. third rotating shaft; 20. cam; 21. first pulley group; 22. second pulley group; 23. fourth rotating shaft; 24. first bevel gear; 25. second bevel gear. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figures 1 to 7 As shown, in an embodiment of the present invention, a two-phase flow uniformly distributed plate-fin heat exchanger includes a heat exchanger body 1, a feed pipe 2 and a discharge pipe 3 are installed on the side wall of the heat exchanger body 1, and a separation component is arranged inside the discharge pipe 3;

[0031] The separation assembly comprises a filter plate 4 arranged inside the discharge pipe 3 , a partition plate 5 is fixedly mounted on the top of the filter plate 4 , and exhaust holes 6 are evenly opened on the inner wall of the partition plate 5 .

[0032] Existing: CN220062679U discloses a plate-fin heat exchanger with gas-liquid separation function. This patent discloses the heat exchanger body 1 proposed in this application document. This technical means will not be described in detail here;

[0033] When the gas-liquid two-phase mixture is discharged from the device, the gas-liquid mixture contacts the filter plate 4, is buffered and separated by the filter plate 4, the gas flows upward and is discharged upward through the exhaust hole 6, and the liquid is directly discharged after passing through the filter plate 4, thereby achieving the effect of gas-liquid separation;

[0034] The gas-liquid separation device provided in the device reduces the volume and can further reduce the pressure drop, thereby improving the heat exchange efficiency.

[0035] like Figure 2 and Figure 3 As shown, a buffer plate 7 is evenly arranged on one side of the filter plate 4 , and the buffer plate 7 is fixedly installed on the bottom end of the partition plate 5 .

[0036] The residence time of the gas-liquid mixture in the discharge pipe 3 can be increased, so that the gas-liquid two phases have more opportunities to exchange mass and separate, which helps to improve the efficiency of gas-liquid separation.

[0037] like Figure 2 and Figure 3 As shown, the buffer plate 7 is distributed inclined outwards.

[0038] like Figure 2 and Figure 3 As shown, absorbent cotton 8 is arranged above the partition 5 and is installed on the inner wall of the discharge pipe 3 .

[0039] When the gas flows upward through the exhaust hole 6, it comes into contact with the absorbent cotton 8, which absorbs the residual moisture in the gas to prevent trace amounts of liquid from being entrained in the gas during the gas-liquid separation process. The absorbent cotton 8 can effectively absorb the residual liquid and ensure that the discharged gas is drier, thereby improving the gas-liquid separation effect.

[0040] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a rotating disk 9 is fixedly installed at one end of the absorbent cotton 8, and the rotating disk 9 is rotatably installed on the inner wall of the discharge pipe 3. A first rotating shaft 10 is fixedly connected to the side of the rotating disk 9 away from the absorbent cotton 8. A first gear 11 is fixedly connected to the outer wall of the first rotating shaft 10. The bottom end of the first gear 11 is meshedly connected to a rack plate 13. A reciprocating screw rod 14 is threadedly connected to the inner wall of the rack plate 13. A second gear 15 is fixedly connected to one end of the reciprocating screw rod 14. A third gear 16 is meshedly connected to the bottom end of the second gear 15. A second rotating shaft 17 is fixedly installed on the inner wall of the third gear 16. A motor 18 is provided at one end of the second rotating shaft 17.

[0041] One end of the absorbent cotton 8 away from the rotating disk 9 is fixedly connected to the inner wall of the discharge pipe 3;

[0042] During the gas-liquid separation process, the starting motor 18 drives the second rotating shaft 17 to rotate, the rotation of the second rotating shaft 17 drives the rotation of the third gear 16, the rotation of the third gear 16 drives the rotation of the second gear 15, the rotation of the second gear 15 drives the rotation of the reciprocating screw 14, the rotation of the reciprocating screw 14 drives the movement of the rack plate 13, the movement of the rack plate 13 drives the rotation of the first gear 11, the rotation of the first gear 11 drives the rotation of the first rotating shaft 10, the rotation of the first rotating shaft 10 drives the rotation of the rotating disk 9, the rotation of the rotating disk 9 drives the rotation of the absorbent cotton 8, which helps to squeeze out the water inside the absorbent cotton 8, so that the absorbent cotton 8 can restore its water absorption capacity and extend its service life.

[0043] The top of one side of the partition 5 is tilted outwards, and is used to guide the absorbent cotton 8 when it is wrung out, so that the wrung out water can be discharged from the exhaust hole 6 into the liquid below.

[0044] like Figure 4 As shown, a plurality of water-absorbing cottons 8 are evenly arranged, and the plurality of water-absorbing cottons 8 are located on the same horizontal plane.

[0045] When the rack plate 13 moves, the rack plate 13 meshes with the first gear 11 on one side of each absorbent cotton 8 in turn, so that the multiple absorbent cottons 8 are wrung out water in turn to achieve continuous water absorption.

[0046] like Figure 4 As shown, a coil spring 12 is installed on the outer wall of the first rotating shaft 10 .

[0047] When the rack plate 13 meshes with the first gear 11 to drive it to rotate, the coil spring 12 deforms to store elastic potential energy;

[0048] When the rack plate 13 moves away from the first gear 11, the coil spring 12 releases elastic potential energy to drive the first rotating shaft 10 to reverse and reset;

[0049] A rotation damper is installed on the outer wall of the first rotating shaft 10 to slow down the resetting speed of the first rotating shaft 10 when it is reversed, so as to give the absorbent cotton 8 enough time to fully discharge the absorbed water and reduce the residual water.

[0050] like Figure 7 As shown, the inner wall diameter of the second gear 15 is ten N times the inner wall diameter of the third gear 16, and N is a positive integer.

[0051] The third gear 16 is configured as a sector gear, so that when the third gear 16 rotates, it drives the second gear 15 to rotate intermittently, thereby reducing the rotation speed of the second gear 15, thereby slowing down the movement of the rack plate 13, reducing the wear on the absorbent cotton 8, and extending its service life, which helps to reduce replacement costs and improve the overall economic benefits of the equipment.

[0052] like Figure 4 and Figure 5 As shown, a second pulley set 22 is installed on the outer wall of the second rotating shaft 17, a fourth rotating shaft 23 is installed on the bottom of the second pulley set 22, one end of the fourth rotating shaft 23 is fixedly connected to a first bevel gear 24, one side of the first bevel gear 24 is meshedly connected to a second bevel gear 25, one side of the second bevel gear 25 is fixedly installed with a third rotating shaft 19, and a cam 20 is fixedly installed on the outer wall of the third rotating shaft 19.

[0053] When the second rotating shaft 17 rotates, the fourth rotating shaft 23 is driven to rotate through the second pulley set 22, the rotation of the fourth rotating shaft 23 drives the rotation of the first bevel gear 24, the rotation of the first bevel gear 24 drives the rotation of the second bevel gear 25, the rotation of the second bevel gear 25 drives the rotation of the third rotating shaft 19, the rotation of the third rotating shaft 19 drives the rotation of the cam 20, so that the third rotating shaft 19 knocks on the inner wall of the discharge pipe 3 to generate vibration, which helps to break the droplets or bubbles in the gas-liquid mixture and promote the separation of the gas-liquid two phases.

[0054] like Figure 2 , Figure 3 and Figure 4 As shown, the third rotating shafts 19 are arranged around the inner wall of the discharge pipe 3, and each of the third rotating shafts 19 is driven by a first pulley set 21.

[0055] The inner walls around the discharge pipe 3 are tapped to further promote the separation of the gas-liquid two phases.

[0056] Working principle and usage process:

[0057] When the gas-liquid two-phase mixture is discharged from the device, the gas-liquid mixture first contacts the filter plate 4, is buffered and separated by the filter plate 4, and the gas flows upward and is discharged upward through the exhaust hole 6. The gas contacts the absorbent cotton 8 and the absorbent cotton 8 absorbs the residual moisture in the gas. The liquid is directly discharged after passing through the filter plate 4, thereby achieving the effect of gas-liquid separation;

[0058] At the same time, the motor 18 is started to drive the second rotating shaft 17 to rotate, the rotation of the second rotating shaft 17 drives the rotation of the third gear 16, the rotation of the third gear 16 drives the rotation of the second gear 15, the rotation of the second gear 15 drives the rotation of the reciprocating screw 14, the rotation of the reciprocating screw 14 drives the movement of the rack plate 13, the movement of the rack plate 13 drives the rotation of the first gear 11, the rotation of the first gear 11 drives the rotation of the first rotating shaft 10, the rotation of the first rotating shaft 10 drives the rotation of the rotating disk 9, the rotation of the rotating disk 9 drives the rotation of the water-absorbing cotton 8, which helps to squeeze out the water inside the water-absorbing cotton 8, so that the water-absorbing cotton 8 can restore its water absorption capacity;

[0059] At the same time, when the second rotating shaft 17 rotates, the fourth rotating shaft 23 is driven to rotate through the second pulley set 22, the rotation of the fourth rotating shaft 23 drives the rotation of the first bevel gear 24, the rotation of the first bevel gear 24 drives the rotation of the second bevel gear 25, the rotation of the second bevel gear 25 drives the rotation of the third rotating shaft 19, the rotation of the third rotating shaft 19 drives the rotation of the cam 20, so that the third rotating shaft 19 knocks on the inner wall of the discharge pipe 3 to generate vibration, thereby promoting the separation of the gas-liquid two phases.

[0060] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A two-phase flow uniformly distributed plate-fin heat exchanger, comprising a heat exchanger body (1), characterized in that: A feed pipe (2) and a discharge pipe (3) are installed on the side wall of the heat exchanger body (1), and a separation component is arranged inside the discharge pipe (3); The separation assembly comprises a filter plate (4) arranged inside the discharge pipe (3), a partition plate (5) is fixedly mounted on the top of the filter plate (4), and exhaust holes (6) are evenly opened on the inner wall of the partition plate (5).

2. A two-phase flow uniformly distributed plate-fin heat exchanger according to claim 1, characterized in that: A buffer plate (7) is evenly arranged on one side of the filter plate (4), and the buffer plate (7) is fixedly mounted on the bottom end of the partition plate (5).

3. A two-phase flow uniformly distributed plate-fin heat exchanger according to claim 2, characterized in that: The buffer plates (7) are distributed outwardly and tilted.

4. The two-phase flow uniformly distributed plate-fin heat exchanger according to claim 1, characterized in that: Water-absorbing cotton (8) is arranged above the partition (5), and the water-absorbing cotton (8) is installed on the inner wall of the discharge pipe (3).

5. The two-phase flow uniformly distributed plate-fin heat exchanger according to claim 4, characterized in that: A rotating disk (9) is fixedly mounted on one end of the absorbent cotton (8), and the rotating disk (9) is rotatably mounted on the inner wall of the discharge pipe (3). A first rotating shaft (10) is fixedly connected to the side of the rotating disk (9) away from the absorbent cotton (8). A first gear (11) is fixedly connected to the outer wall of the first rotating shaft (10). The bottom end of the first gear (11) is meshedly connected to a rack plate (13). The inner wall of the rack plate (13) is threadedly connected to a reciprocating screw rod (14). One end of the reciprocating screw rod (14) is fixedly connected to a second gear (15). The bottom end of the second gear (15) is meshedly connected to a third gear (16). A second rotating shaft (17) is fixedly mounted on the inner wall of the third gear (16). A motor (18) is provided at one end of the second rotating shaft (17).

6. The two-phase flow uniformly distributed plate-fin heat exchanger according to claim 4, characterized in that: A plurality of the water-absorbing cottons (8) are evenly arranged, and the plurality of the water-absorbing cottons (8) are located on the same horizontal plane.

7. The two-phase flow uniformly distributed plate-fin heat exchanger according to claim 5, characterized in that: A coil spring (12) is installed on the outer wall of the first rotating shaft (10).

8. The two-phase flow uniformly distributed plate-fin heat exchanger according to claim 5, characterized in that: The inner wall diameter of the second gear (15) is ten N times the inner wall diameter of the third gear (16), and N is a positive integer.

9. The two-phase flow uniformly distributed plate-fin heat exchanger according to claim 5, characterized in that: A second pulley group (22) is mounted on the outer wall of the second rotating shaft (17); a fourth rotating shaft (23) is mounted on the bottom of the second pulley group (22); one end of the fourth rotating shaft (23) is fixedly connected to a first bevel gear (24); one side of the first bevel gear (24) is meshedly connected to a second bevel gear (25); a third rotating shaft (19) is fixedly mounted on one side of the second bevel gear (25); and a cam (20) is fixedly mounted on the outer wall of the third rotating shaft (19).

10. The two-phase flow uniformly distributed plate-fin heat exchanger according to claim 9, characterized in that: The third rotating shafts (19) are arranged around the inner wall of the discharge pipe (3), and each of the third rotating shafts (19) is driven by a first belt pulley group (21).

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