A hydrogen fluoride condenser for waste electrolyte recovery

Abstract

The present invention discloses a hydrogen fluoride condenser for waste electrolyte recovery, belonging to the field of steam condensation. It includes a housing with a cavity inside and two side plates fixedly connected to the inner walls at the two openings of the cavity. Two partitions are symmetrically and fixedly connected to the inner wall of the housing, and a sealed chamber is formed between the two partitions. A liquid discharge port one and a liquid inlet port one communicating with the sealed chamber are respectively provided at the upper and lower ends of the housing. An air inlet and an air outlet communicating with the cavity are respectively provided at the upper end of the housing; the cooling medium not only flows between the inner pipe and the outer pipe, but also flows outside the outer pipe. The design of multiple layers of cooling medium increases the total area of heat exchange, which helps more heat to be conducted from the gas pipeline to the cooling medium. Even if the temperature of part of the cooling medium rises, the multi-level heat exchange can still be used to maintain a high cooling efficiency and ensure that the temperature of the cooling medium will not rise sharply to an extent that affects the cooling effect of the upper pipeline.

Description

Technical Field

[0001] The present invention relates to the field of steam condensation, and more specifically, to a hydrogen fluoride condenser for waste electrolyte recovery. Background Art

[0002] Waste electrolytes usually refer to electrolyte solutions or electrolyte materials generated in industrial, electrochemical or experimental processes that are no longer useful or do not meet the usage standards. There are various methods for recovering waste electrolytes, and evaporation concentration is one of them. The evaporation concentration method mainly removes solvents and moisture in the waste electrolyte and recovers useful components. However, if the waste electrolyte contains hydrogen fluoride (such as by-products of certain aluminum electrolysis, battery electrolytes or fluorine-containing chemical reactions), during heating or processing, these hydrogen fluoride gases may evaporate into a gaseous state. Therefore, a hydrogen fluoride condenser is needed to cool and condense these gaseous hydrogen fluorides into a liquid state for recycling.

[0003] The prior art (a Chinese utility model with the publication number CN204240823U) discloses a hydrogen fluoride condenser. When gas passes through the condensation tube, heat exchange between the tube wall of the condensation tube and cooling water is used to condense the hydrogen fluoride gas inside the condensation tube. Its heat exchange and condensation principle is the same as that of a surface condenser. During the actual use of the condenser, in order to improve the processing and condensation efficiency of the gas, multiple condensation tubes are provided in the condenser. Since the temperature of the cooling medium will increase during the heat exchange process between the cooling medium and the condensation tube, the heated cooling medium will flow upward inside the condenser, resulting in a heat convection phenomenon, causing the temperature of the upper part and the lower part of the cooling medium inside the condenser to be different, and reducing the cooling effect of the condensation tubes in the upper region of the cooling medium. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a hydrogen fluoride condenser for waste electrolyte recovery.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A hydrogen fluoride condenser for waste electrolyte recovery includes a housing with a cavity inside and two side plates fixedly connected to the inner walls at the two openings of the cavity. Two partition plates are symmetrically and fixedly connected to the inner wall of the housing, and a sealed chamber is formed between the two partition plates. A liquid discharge port one and a liquid inlet port one communicating with the sealed chamber are respectively opened at the upper end and the lower end of the housing. An air inlet and an air outlet communicating with the cavity are respectively opened at the upper end of the housing, and two liquid discharge ports two communicating with the cavity are symmetrically opened at the lower end of the housing;

[0007] A plurality of heat exchange parts are connected between the two partition plates. The heat exchange part includes a heat exchange inner tube with both ends rotatably connected inside the two partition plates respectively, a heat exchange outer tube sleeved outside the heat exchange inner tube and fixedly connected to one side of the two partition plates respectively at both ends, a second liquid inlet and a third liquid outlet respectively opened at both ends of the outer surface of the heat exchange outer tube. A plurality of pipeline interfaces for connecting to the second liquid inlets and the third liquid outlets through pipelines are opened at the upper end of the shell.

[0008] Furthermore, the heat exchange outer tube includes a throat part, a liquid inlet end and a diffused liquid outlet end integrally formed at both ends of the throat part respectively. The second liquid inlet is opened on the outer surface of the liquid inlet end, and the third liquid outlet is opened on the outer surface of the diffused liquid outlet end.

[0009] Furthermore, spiral blades are fixedly connected to the outer surface of the heat exchange inner tube.

[0010] Furthermore, a conical inner cavity is opened inside the heat exchange inner tube.

[0011] Furthermore, a plurality of first rotary seals and second rotary seals are fixedly connected inside the two partition plates respectively. The first rotary seals and the second rotary seals are both sleeved outside the rotary inner tube and used for dynamically sealing the rotary inner tube.

[0012] Furthermore, a flow promoting unit is also connected inside the shell. The flow promoting unit includes a driving part connected between one side plate and the adjacent partition plate, and a second sprocket fixedly connected to one end of a plurality of rotary inner tubes and drivingly connected to the driving part.

[0013] Furthermore, the driving part includes a plurality of rotating shafts rotatably connected to one side of one side plate and one side of one partition plate respectively at both ends, a plurality of first sprockets fixedly connected to the outer surfaces of the plurality of rotating shafts respectively, and a first chain belt drivingly connecting the first sprockets and the second sprockets. A plurality of motors are fixedly connected to the other side of the side plate. The output shafts of the plurality of motors penetrate through the side plate and are fixedly connected to one end of the plurality of rotating shafts respectively.

[0014] Furthermore, a tube inner descaling assembly is also connected inside the shell. The tube inner descaling assembly includes a plurality of support rods located inside the plurality of heat exchange inner tubes, a plurality of sleeve rods movably sleeved outside the plurality of support rods respectively, and bristles fixedly connected to the outside of the plurality of sleeve rods. Both ends of the support rods are connected to the two side plates respectively.

[0015] Further, a transmission part for driving the support rod to rotate is connected to one side of one of the side plates. The transmission part includes a plurality of first grooves formed on one side of the side plate, a plurality of sprocket wheels III rotatably connected to the inner walls of the plurality of first grooves, a second chain belt connecting the vertically arranged plurality of sprocket wheels III, rotating seats respectively fixed to one sides of the plurality of sprocket wheels III, a plurality of first gears respectively fixed to the outer parts of a plurality of rotating shafts, and a plurality of second gears respectively sleeved on the outer parts of the plurality of rotating seats adjacent to the rotating shafts and meshing with the first gears. One end of the support rod is fixed to one side of the rotating seat.

[0016] Further, a spring is sleeved on the outer part of one end of the support rod, and a ring body is fixed to the outer surface of one end of the sleeve rod. Two ends of the spring are respectively connected to the ring body and one side of the rotating seat. A plurality of flanges are fixed to the other end of the sleeve rod, and a first inclined surface is formed on one side of each of the plurality of flanges. A plurality of second grooves for accommodating the flanges are formed on one side of one of the side plates, and a second inclined surface matching with the first inclined surface is formed on the inner wall of the second groove.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] (1) In this solution, a heat exchange outer tube and a heat exchange inner tube located inside the heat exchange outer tube are provided. By injecting a cooling medium between the heat exchange outer tube and the heat exchange inner tube, and at the same time, the cooling medium also flows in the closed chamber between the two partition plates. The cooling medium not only flows between the inner tube and the outer tube, but also flows outside the outer tube. The design of multiple layers of cooling medium increases the total area of heat exchange, which helps more heat to be conducted from the pipeline to the cooling medium. Even if the temperature of part of the cooling medium rises, the high cooling efficiency can still be maintained through multi-level heat exchange, thereby reducing the gas temperature. The cooling medium between the inner tube and the outer tube will first absorb heat, and the cooling medium outside the outer tube further absorbs heat. Even if the temperature of the cooling medium between the inner tube and the outer tube rises, the cooling medium outside the outer tube can continue to absorb heat to ensure that the temperature of the cooling medium will not rise sharply to affect the cooling effect of the upper pipeline.

[0019] (2) This solution is provided with a flow-promoting unit. The spiral blades are arranged on the outer surface of the inner heat exchange tube, which can effectively increase the heat exchange surface area and improve the heat exchange efficiency. The driving part drives the inner heat exchange tube to rotate in the outer heat exchange tube. The rotation of the inner heat exchange tube and the spiral blades cause the cooling medium flowing through the spiral blades to change the flow direction, enhancing the turbulence. This can not only reduce the temperature difference on the pipe surface and avoid excessive temperature gradient change of the cooling medium, but also enhance the turbulence of the cooling medium, further improving the heat exchange process. The rotation can also avoid the "dead zone" of the cooling medium caused by uneven flow, thereby improving the overall cooling efficiency. At the same time, the rotation of the inner heat exchange tube can effectively prevent the formation of deposits (such as scaling or impurities) on the inner wall of the pipe. Especially when the gas turns into liquid during the condensation process, it often leads to the deposition of scale, grease or other substances on the pipe surface. Through rotation, the deposits on the inner wall of the pipe will be continuously broken up or removed, thus reducing the scaling problem and extending the service life of the condenser.

[0020] (3) This solution is provided with an in-pipe descaling assembly. The driving part drives the support rod and the sleeve rod to rotate through the transmission part. The rotation of the sleeve rod can continuously clean the dust, impurities or solid particles on the inner wall of the pipe through the brush bristles. This dynamic cleaning method can prevent the blockage of the pipe caused by the accumulation of impurities and avoid the influence of the impurities adhering to the inner wall of the inner heat exchange tube on the heat exchange efficiency. At the same time, the rotating brush bristles will disturb the gas flow in the inner heat exchange tube while cleaning, breaking the static boundary layer between the gas and the pipe wall, making the heat exchange between the air flow and the pipe wall more uniform and efficient. Description of the Drawings

[0021] Figure 1 is the overall structural schematic diagram of the present invention;

[0022] Figure 2 is the structural schematic diagram of the second drain port and the first liquid inlet of the present invention;

[0023] Figure 3 is the cross-sectional view of the present invention;

[0024] Figure 4 is the cross-sectional view of the heat exchange part of the present invention;

[0025] Figure 5 is the structural schematic diagram of the driving part of the present invention;

[0026] Figure 6 is the structural schematic diagram of the transmission part of the present invention;

[0027] Figure 7 is the structural schematic diagram of the third sprocket and the second chain belt of the present invention;

[0028] Figure 8 of the present invention Figure 6 is the enlarged schematic diagram of the structure at A in;

[0029] Figure 9 Schematic diagram of the sleeve rod and brush structure of the present invention;

[0030] Figure 10 For the present invention Figure 9 Enlarged schematic diagram of the structure at position B in the present invention;

[0031] Figure 11 Schematic diagram of the second groove and the second inclined surface structure of the present invention;

[0032] Figure 12 For the present invention Figure 11 Enlarged schematic diagram of the structure at position C in the present invention.

[0033] Explanation of the reference numerals in the figure:

[0034] 1. Housing; 11. Air inlet; 12. Air outlet; 13. First liquid discharge port; 14. Pipeline interface; 15. Second liquid discharge port; 16. First liquid inlet; 2. Side plate; 3. Partition; 4. Heat exchange part; 41. Heat exchange outer tube; 411. Liquid inlet end; 412. Throat; 413. Diffused liquid outlet end; 42. Heat exchange inner tube; 421. Conical inner cavity; 422. Spiral blade; 43. Second liquid inlet; 44. Third liquid discharge port; 5. Flow promotion unit; 51. Driving part; 511. Motor; 512. Rotating shaft; 513. First sprocket; 514. First chain belt; 52. First rotary seal; 53. Second rotary seal; 54. Second sprocket; 55. Transmission part; 551. First groove; 552. Rotating seat; 553. First gear; 554. Second gear; 555. Third sprocket; 556. Second chain belt; 56. In-tube descaling assembly; 561. Support rod; 562. Sleeve rod; 563. Brush; 564. Spring; 565. Ring body; 566. First inclined surface; 567. Flange; 568. Second groove; 569. Second inclined surface. Specific embodiments

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0036] Please refer to Figures 1 to 12, a hydrogen fluoride condenser for waste electrolyte recovery, including a housing 1 with a cavity inside and two side plates 2 fixedly connected to the inner walls of the two openings of the cavity. Two partitions 3 are symmetrically fixedly connected to the inner wall of the housing 1, and a sealed chamber is formed between the two partitions 3. A liquid discharge port 13 and a liquid inlet 16 communicating with the sealed chamber are respectively opened at the upper and lower ends of the housing 1. An air inlet 11 and an air outlet 12 communicating with the cavity are respectively opened at the upper end of the housing 1, and two liquid discharge ports 15 communicating with the cavity are symmetrically opened at the lower end of the housing 1;

[0037] A plurality of heat exchange parts 4 are connected between the two partitions 3. The heat exchange part 4 includes a heat exchange inner tube 42 with both ends rotatably connected to the inside of the two partitions 3 respectively, a heat exchange outer tube 41 sleeved outside the heat exchange inner tube 42 and fixedly connected to one side of the two partitions 3 at both ends respectively, a liquid inlet 43 and a liquid discharge port 44 respectively opened at both ends of the outer surface of the heat exchange outer tube 41. A plurality of pipe interfaces 14 for connecting to the liquid inlet 43 and the liquid discharge port 44 through pipes are opened at the upper end of the housing 1.

[0038] The heat exchange outer tube 41 includes a throat 412, a liquid inlet end 411 and a diffused liquid outlet end 413 integrally formed at both ends of the throat 412 respectively. The liquid inlet 43 is opened on the outer surface of the liquid inlet end 411, and the liquid discharge port 44 is opened on the outer surface of the diffused liquid outlet end 413. The heat exchange outer tube 41 adopts the structural design of the liquid inlet end 411, the throat 412 and the diffused liquid outlet end 413. Such a design can make the cooling medium flow through the narrowed throat 412 from the liquid inlet end 411, and the fluid velocity increases, thereby improving the flow rate of the cooling medium and the heat exchange and cooling efficiency.

[0039] A spiral blade 422 is fixedly connected to the outer surface of the heat exchange inner tube 42. The arrangement of the spiral blade 422 on the outer surface of the heat exchange inner tube 42 can effectively increase the heat exchange surface area and improve the heat exchange efficiency.

[0040] A conical inner cavity 421 is opened inside the heat exchange inner tube 42.

[0041] By adopting the above technical solution, hydrogen fluoride gas enters the interior of the housing 1 from the air inlet 11, and enters the conical inner cavity 421 inside the heat exchange inner tube 42 from one end of the heat exchange inner tube 42. After passing through the conical inner cavity 421, it is discharged from the other end of the heat exchange inner tube 42, and the discharged gas is discharged from the air outlet 12. The cooling medium (water or other cooling liquid) enters the sealed chamber between the two partitions 3 from the first liquid inlet 16. Connect the pipeline interface 14 to the external liquid inlet pipeline and the liquid return pipeline. The pipeline interface 14 is connected to the second liquid inlet 43 and the third liquid discharge port 44 through pipelines (the pipelines are not shown in the accompanying drawings of the specification of this application). The cooling medium in the liquid inlet pipeline enters the second liquid inlet 43 through the pipeline from the pipeline interface 14, enters between the heat exchange outer tube 41 and the heat exchange inner tube 42 from the second liquid inlet 43, and is discharged into the liquid return pipeline from the third liquid discharge port 44. The cooling medium not only flows between the heat exchange outer tube 41 and the heat exchange inner tube 42, but also flows outside the heat exchange outer tube 41. The design of multiple layers of cooling medium increases the total area of heat exchange, which helps more heat to be conducted from the pipeline to the cooling medium. Even if the temperature of some cooling medium rises, the high cooling efficiency can still be maintained through multi-level heat exchange, thereby reducing the gas temperature. The cooling medium between the heat exchange outer tube 41 and the heat exchange inner tube 42 will first absorb heat, while the cooling medium outside the heat exchange outer tube 41 further absorbs heat. Even if the temperature of the cooling medium between the heat exchange outer tube 41 and the heat exchange inner tube 42 rises, the cooling medium outside the heat exchange outer tube 41 can continue to absorb heat to ensure that the temperature of the cooling medium will not rise sharply to an extent that affects the cooling effect of the upper pipeline. When the hydrogen fluoride gas passes through the conical inner cavity 421, it can exchange heat with the cooling medium to condense the hydrogen fluoride gas in the heat exchange inner tube 42. After the cooling medium cools the hydrogen fluoride gas in the heat exchange inner tube 42, since the cross-section of the conical inner cavity 421 is an inclined plane, the condensed water formed after the gas is condensed by the heat exchange inner tube 42 will be discharged from one end of the heat exchange inner tube 42 and discharged through the second liquid discharge port 15 on one side.

[0042] As Figure 4 and Figure 5 shown, a plurality of first rotary seals 52 and second rotary seals 53 are fixedly connected inside the two partitions 3 (both the first rotary seals 52 and the second rotary seals 53 adopt rotary shaft seals. Rotary shaft seals are common means for dynamic sealing of rotary shafts and belong to mature prior art, which will not be elaborated here. Their function is to prevent the cooling medium between the two partitions 3 from flowing outwards from the connection between the partition 3 and the heat exchange inner tube 42), and both the first rotary seals 52 and the second rotary seals 53 are sleeved outside the rotary inner tube and used for dynamic sealing of the rotary inner tube.

[0043] A flow promoting unit 5 is also connected inside the housing 1, and the flow promoting unit 5 includes a driving part 51 connected between one of the side plates 2 and the adjacent partition 3, and a second sprocket 54 fixedly connected to one end of a plurality of rotating inner tubes and drivingly connected to the driving part 51.

[0044] The driving part 51 includes a plurality of rotating shafts 512 rotatably connected to one side of one of the side plates 2 and one of the partitions 3 at both ends, a plurality of first sprockets 513 fixedly connected to the outer surfaces of the plurality of rotating shafts 512, and a first chain belt 514 drivingly connecting the first sprockets 513 and the second sprockets 54. A plurality of motors 511 are fixedly connected to the other side of the side plate 2, and the output shafts of the plurality of motors 511 penetrate through the side plate 2 and are respectively fixedly connected to one end of the plurality of rotating shafts 512.

[0045] By adopting the above technical solution, when the motor 511 works, it drives the rotating shaft 512 to rotate. The rotation of the rotating shaft 512 drives the first sprocket 513 to rotate. The rotation of the first sprocket 513 drives the plurality of second sprockets 54 to rotate through the first chain belt 514. The rotation of the second sprockets 54 can drive the heat exchange inner tube 42 to rotate inside the two partitions 3. The rotation of the heat exchange inner tube 42 changes the flow direction of the cooling medium flowing through the spiral blades 422, enhances the turbulence, which can not only reduce the temperature difference on the surface of the pipeline, avoid too large a gradual change in the temperature of the cooling medium, but also enhance the turbulence of the cooling medium, further improving the heat exchange process. The rotation can also avoid the "dead zone" of the cooling medium caused by uneven flow, thereby improving the overall cooling efficiency. At the same time, the rotation of the heat exchange inner tube 42 can effectively prevent deposits (such as scale or impurities) from forming on the inner wall of the heat exchange inner tube 42. Especially when the gas turns into a liquid during the condensation process, it often causes scale, grease or other substances to deposit on the surface of the pipeline. Through rotation, the deposits on the inner wall of the heat exchange inner tube 42 will be continuously broken up or removed, thus reducing the scaling problem and extending the service life of the condenser.

[0046] As Figures 5 - 7 shown, a pipe inner descaling assembly 56 is also connected inside the housing 1. The pipe inner descaling assembly 56 includes a plurality of support rods 561 located inside the plurality of heat exchange inner tubes 42, a plurality of sleeve rods 562 movably sleeved outside the plurality of support rods 561, and bristles 563 fixedly connected to the outside of the plurality of sleeve rods 562. Both ends of the support rod 561 are connected to the two side plates 2 respectively.

[0047] One side of one of the side plates 2 is connected with a transmission part 55 for driving the rotation of the support rod 561. The transmission part 55 includes a plurality of first grooves 551 formed on one side of the side plate 2, a plurality of third sprockets 555 rotatably connected to the inner walls of the plurality of first grooves 551, a second chain belt 556 connecting the vertically arranged plurality of third sprockets 555, a rotating seat 552 fixedly connected to one side of each of the plurality of third sprockets 555, a plurality of first gears 553 fixedly connected to the outside of the plurality of rotating shafts 512 respectively, and a plurality of second gears 554 sleeved on the outside of the plurality of rotating seats 552 adjacent to the rotating shafts 512 and meshing with the first gears 553. One end of the support rod 561 is fixedly connected to one side of the rotating seat 552.

[0048] By adopting the above technical solution, the rotation of the rotating shaft 512 can also drive the rotation of the first gear 553. The rotation of the first gear 553 can drive the rotation of the rotating seat 552 adjacent to the first gear 553. The rotation of the rotating seat 552 drives the rotation of the third sprocket 555. When the third sprocket 555 on the rotating seat 552 driven by the first gear 553 rotates, it can drive the rotation of the remaining third sprockets 555 and the rotating seats 552 through the second chain belt 556. The rotation of the rotating seat 552 drives the rotation of the support rod 561 and the sleeve rod 562. The rotation of the sleeve rod 562 drives the rotation of the brush bristles 563. And the rotation direction of the sleeve rod 562 is opposite to the rotation direction of the heat exchange inner tube 42. The rotation of the sleeve rod 562 can continuously clean the dust, impurities or solid particles on the inner wall of the heat exchange inner tube 42 through the brush bristles 563. This dynamic cleaning method can prevent the pipeline blockage caused by the accumulation of impurities, avoid the influence of the impurities adhered to the inner wall of the heat exchange inner tube 42 on the heat exchange efficiency. At the same time, the rotating brush bristles 563 will disturb the gas flow in the heat exchange inner tube 42 during cleaning, break the static boundary layer between the gas and the pipe wall, and make the heat exchange between the air flow and the pipe wall more uniform and efficient.

[0049] As Figures 8 - 12 shown, a spring 564 is sleeved on the outside of one end of the support rod 561. And a ring body 565 is fixedly connected to the outer surface of one end of the sleeve rod 562. Two ends of the spring 564 are respectively connected to the ring body 565 and one side of the rotating seat 552. A plurality of flanges 567 are fixedly connected to the other end of the sleeve rod 562. And a first inclined surface 566 is formed on one side of each of the plurality of flanges 567. A plurality of second grooves 568 for accommodating the flanges 567 are formed on one side of one of the side plates 2. And a second inclined surface 569 matching the first inclined surface 566 is formed on the inner wall of the second groove 568.

[0050] By adopting the above technical solution, when the support rod 561 and the sleeve rod 562 rotate, the flange 567 at one end of the sleeve rod 562 also rotates accordingly. The inclined surface 566 on the flange 567 slides out along the inclined surface 569 on the inner wall of the groove 568, and the flange 567 can be removed from the groove 568. When the flange 567 is removed from the groove 568, the flange 567 can push the sleeve rod 562 to slide outside the support rod 561. The sleeve rod 562 moves towards the spring 564 and compresses the spring 564. When the flange 567 enters the groove 568 again, the spring 564 can push the sleeve rod 562 to move towards the flange 567 and reset the sleeve rod 562. In this way, the sleeve rod 562 can also move horizontally during rotation, thereby driving the brush bristles 563 to rotate and move horizontally, improving the cleaning effect of the brush bristles 563 on the attachments on the inner wall of the heat exchange inner tube 42.

[0051] Usage method: Hydrogen fluoride gas enters the housing 1 from the air inlet 11 and enters the conical inner cavity 421 inside the heat exchange inner tube 42 from one end of the heat exchange inner tube 42. After passing through the conical inner cavity 421, it is discharged from the other end of the heat exchange inner tube 42, and the discharged gas is discharged from the air outlet 12. The cooling medium (water or other cooling liquids) enters the sealed chamber between the two partitions 3 from the first liquid inlet 16. Connect the pipeline interface 14 to the inlet pipeline and the return pipeline externally. The pipeline interface 14 is connected to the second liquid inlet 43 and the third liquid outlet 44 through pipelines (the pipelines are not shown in the attached drawings of the specification of this application). The cooling medium in the inlet pipeline enters the second liquid inlet 43 through the pipeline from the pipeline interface 14, enters between the heat exchange outer tube 41 and the heat exchange inner tube 42 from the second liquid inlet 43, and is discharged from the third liquid outlet 44 into the return pipeline. The cooling medium not only flows between the heat exchange outer tube 41 and the heat exchange inner tube 42, but also flows outside the heat exchange outer tube 41. The cooling medium between the heat exchange outer tube 41 and the heat exchange inner tube 42 will first absorb heat, while the cooling medium outside the heat exchange outer tube 41 further absorbs heat. Even if the temperature of the cooling medium between the heat exchange outer tube 41 and the heat exchange inner tube 42 rises, the cooling medium outside the heat exchange outer tube 41 can continue to absorb heat, ensuring that the temperature of the cooling medium will not rise sharply to an extent that affects the cooling effect of the upper pipeline. When the driving part 51 works, it can drive a plurality of sprockets 54 to rotate. The rotation of the sprockets 54 can drive the heat exchange inner tube 42 to rotate inside the two partitions 3. The rotation of the heat exchange inner tube 42 changes the flow direction of the cooling medium flowing through the spiral blades 422 and enhances the turbulence. At the same time, the driving part 51 can drive the transmission part 55 to work. The work of the transmission part 55 can drive the support rod 561 and the sleeve rod 562 to rotate. The rotation of the sleeve rod 562 drives the brush bristles 563 to rotate, and the rotation direction of the sleeve rod 562 is opposite to the rotation direction of the heat exchange inner tube 42. The rotation of the sleeve rod 562 can continuously clean the dust, impurities or solid particles on the inner wall of the heat exchange inner tube 42 through the brush bristles 563.

[0052] The above are only the preferred specific embodiments of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, making equivalent substitutions or changes, should be covered by the protection scope of the present invention.

Claims

1. A hydrogen fluoride condenser for waste electrolyte recovery, comprising a housing (1) with a cavity formed inside and two side plates (2) fixedly connected to the inner walls at the two openings of the cavity, characterized in that: On the inner wall of the housing (1), two partitions (3) are symmetrically and fixedly connected, and a sealed chamber is formed between the two partitions (3). The upper and lower ends of the housing (1) are respectively provided with a first liquid discharge port (13) and a first liquid inlet port (16) communicating with the sealed chamber. The upper end of the housing (1) is respectively provided with an air inlet (11) and an air outlet (12) communicating with the cavity, and two second liquid discharge ports (15) communicating with the cavity are symmetrically provided at the lower end of the housing (1); A plurality of heat exchange parts (4) are connected between the two partitions (3). The heat exchange part (4) includes a heat exchange inner tube (42) with both ends rotatably connected inside the two partitions (3), a heat exchange outer tube (41) sleeved outside the heat exchange inner tube (42) and fixedly connected to one side of the two partitions (3) at both ends, a second liquid inlet port (43) and a third liquid discharge port (44) respectively provided at both ends of the outer surface of the heat exchange outer tube (41). The upper end of the housing (1) is provided with a plurality of pipe connectors (14) for connecting to the second liquid inlet ports (43) and the third liquid discharge ports (44) through pipes; A flow promoting unit (5) is further connected inside the housing (1). The flow promoting unit (5) includes a driving part (51) connected between one side plate (2) and the adjacent partition (3), and a second sprocket (54) fixedly connected to one end of a plurality of rotating inner tubes and drivingly connected to the driving part (51); The driving part (51) includes a plurality of rotating shafts (512) rotatably connected to one side of one side plate (2) and one partition (3) at both ends, a plurality of first sprockets (513) respectively fixedly connected to the outer surfaces of the plurality of rotating shafts (512), a first chain belt (514) drivingly connecting the first sprocket (513) and the second sprocket (54). A plurality of motors (511) are fixedly connected to the other side of the side plate (2). The output shafts of the plurality of motors (511) penetrate through the side plate (2) and are respectively fixedly connected to one end of the plurality of rotating shafts (512); A pipe inner descaling assembly (56) is further connected inside the housing (1). The pipe inner descaling assembly (56) includes a plurality of support rods (561) located inside the plurality of heat exchange inner tubes (42), a plurality of sleeve rods (562) respectively movably sleeved outside the plurality of support rods (561), and bristles (563) fixedly connected to the outside of the plurality of sleeve rods (562). The two ends of the support rods (561) are respectively connected to the two side plates (2); One side of one of the side plates (2) is connected with a transmission part (55) for driving the rotation of the support rod (561). The transmission part (55) includes a plurality of first grooves (551) opened on one side of the side plate (2), a plurality of third sprockets (555) rotatably connected to the inner walls of the plurality of first grooves (551), a second chain belt (556) connecting the vertically arranged plurality of third sprockets (555), a rotating seat (552) fixedly connected to one side of each of the plurality of third sprockets (555), a plurality of first gears (553) fixedly sleeved on the outside of a plurality of rotating shafts (512), and a plurality of second gears (554) sleeved on the outside of a plurality of rotating seats (552) adjacent to the rotating shafts (512) and meshing with the first gears (553). One end of the support rod (561) is fixedly connected to one side of the rotating seat (552).

2. The hydrogen fluoride condenser for waste electrolyte recovery according to claim 1, characterized in that: The heat exchange outer tube (41) includes a throat part (412), a liquid inlet end (411) and a diffused liquid outlet end (413) integrally formed at both ends of the throat part (412). The second liquid inlet (43) is opened on the outer surface of the liquid inlet end (411), and the third liquid outlet (44) is opened on the outer surface of the diffused liquid outlet end (413).

3. The hydrogen fluoride condenser for waste electrolyte recovery according to claim 2, wherein: A spiral blade (422) is fixedly connected to the outer surface of the heat exchange inner tube (42).

4. The hydrogen fluoride condenser for waste electrolyte recovery according to claim 3, characterized in that: A conical inner cavity (421) is opened inside the heat exchange inner tube (42).

5. The hydrogen fluoride condenser for waste electrolyte recovery according to claim 4, characterized in that: A plurality of first rotary seals (52) and second rotary seals (53) are fixedly connected inside both of the two partition plates (3). The first rotary seals (52) and the second rotary seals (53) are both sleeved on the outside of the rotary inner tube and used for dynamically sealing the rotary inner tube.

6. The hydrogen fluoride condenser for waste electrolyte recovery according to claim 5, characterized in that: A spring (564) is sleeved on the outside of one end of the support rod (561). A ring body (565) is fixedly connected to the outer surface of one end of the sleeve rod (562). Both ends of the spring (564) are respectively connected to the ring body (565) and one side of the rotating seat (552). A plurality of flanges (567) are fixedly connected to the other end of the sleeve rod (562). An inclined surface one (566) is opened on one side of each of the plurality of flanges (567). A plurality of second grooves (568) for accommodating the flanges (567) are opened on one side of one of the side plates (2). An inclined surface two (569) matching the inclined surface one (566) is opened on the inner wall of the second groove (568).

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