Hydrofluoric acid distillation recovery device

Abstract

The invention provides a hydrofluoric acid distillation recovery device, and relates to the technical field of distillation recovery equipment, the hydrofluoric acid distillation recovery device comprises a distillation assembly, a recovery mechanism, and a connecting pipe connecting the distillation assembly and the recovery mechanism, the connecting pipe is used for conveying hydrofluoric acid steam, the recovery mechanism comprises a recovery tank, and a cooling liquefaction assembly and a cleaning assembly arranged in the recovery tank, the cooling and liquefying assembly is of a spiral structure, and a spiral liquefying channel is formed between the cooling and liquefying assembly and the recycling tank; the cleaning assembly is used for cleaning the inner wall of the liquefaction channel; in a liquefied state, the connecting pipe conveys hydrofluoric acid steam into the recovery tank, and the hydrofluoric acid steam is liquefied on the inner wall of the liquefaction channel and is collected at the bottom of the recovery tank; in the cleaning state, the connecting pipe is closed, and the cleaning assembly moves along the spiral route to clean hydrofluoric acid steam liquefaction impurities on the inner wall of the liquefaction channel and collect the hydrofluoric acid steam liquefaction impurities at the bottom of the recovery tank. According to the invention, the recovery efficiency and quality of hydrofluoric acid are improved, and the production cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of distillation recovery equipment, in particular to a hydrofluoric acid distillation recovery device. Background Art

[0002] The production and use of hydrofluoric acid and related industrial processes generate waste liquids containing hydrofluoric acid. Direct discharge of these waste liquids not only wastes hydrofluoric acid resources but also causes serious environmental pollution. Therefore, the recycling and utilization of hydrofluoric acid is of great economic and environmental significance.

[0003] Although some hydrofluoric acid recovery devices exist, they generally suffer from several problems. During the cooling and liquefaction process of hydrofluoric acid vapor, impurities produced by the liquefaction of hydrofluoric acid vapor easily adhere to the inner wall of the liquefaction channel. The long-term accumulation of these impurities can affect the recovery efficiency and quality of hydrofluoric acid and may even clog the liquefaction channel, causing the device to malfunction. Furthermore, existing recovery devices require staff to disassemble and clean the inner wall of the liquefaction channel, which is complicated and ineffective, making it difficult to meet actual production needs. Summary of the Invention

[0004] In response to the above problems, the present application provides a hydrofluoric acid distillation recovery device.

[0005] To achieve the above-mentioned objectives, the present application provides the following technical solutions: a hydrofluoric acid distillation and recovery device, comprising a distillation component, a recovery mechanism, and a connecting pipe connecting the distillation component and the recovery mechanism, the connecting pipe being used to transport hydrofluoric acid vapor, the recovery mechanism comprising a recovery tank, and a cooling and liquefaction component and a cleaning component arranged in the recovery tank, the cooling and liquefaction component having a spiral structure, and forming a spiral liquefaction channel between the cooling and liquefaction component and the recovery tank; the cleaning component being used to clean the inner wall of the liquefaction channel; in the liquefied state, the connecting pipe transports the hydrofluoric acid vapor into the recovery tank, the hydrofluoric acid vapor is liquefied on the inner wall of the liquefaction channel, and is collected at the bottom of the recovery tank; in the cleaning state: the connecting pipe is closed, the cleaning component moves along a spiral route, cleans the hydrofluoric acid vapor liquefied impurities on the inner wall of the liquefaction channel, and collects them at the bottom of the recovery tank.

[0006] The cooling and liquefaction component includes a cooling strip arranged along the axis direction of the recovery tank, a liquid inlet pipe and a liquid discharge pipe arranged on the recovery tank and connected to both ends of the cooling strip, and a cooling part connecting the liquid inlet pipe and the liquid discharge pipe. The cooling strip has a spiral strip structure, and a cooling channel for the coolant to pass through is formed inside. The edge of the cooling strip is in contact with the inner wall of the recovery tank, and a spiral liquefaction channel is formed between the cooling strip and the recovery tank; the cooling part controls the coolant to enter the cooling channel through the liquid inlet pipe to cool and liquefy the hydrofluoric acid vapor, and then returns to the cooling part through the liquid discharge pipe to circulate and cool and liquefy the hydrofluoric acid vapor.

[0007] Preferably, the cleaning assembly includes a limit rod passed through the spiral gap of the cooling strip, a limit block slidably mounted on the limit rod, a cleaning block passed through the spiral gap of the cooling strip and in contact with the inner wall of the liquefaction channel, and a control member for adjusting the limit block to slide on the rod body of the limit rod, wherein the limit rod has a spiral structure; the control member adjusts the limit block to slide along the rod body of the limit rod, driving the cleaning block to move along a spiral route in the spiral gap of the cooling strip to clean the inner wall of the liquefaction channel.

[0008] Preferably, the control component includes a cleaning rod arranged along the axis direction of the recovery tank and passing through the cooling strip, a lifting slide rod passing through a lifting groove provided in the rod body of the cleaning rod, a lifting block slidably sleeved on the lifting slide rod, a fixed rod fixedly connected to the lifting block and the opposite surfaces of the limit block, and a control structure for adjusting the rotation of the cleaning rod around the axis, and a cleaning brush that fits the inner wall of the liquefaction channel is provided on the fixed rod and the cleaning block; when the control structure drives the cleaning rod to rotate, the limit block slides along the direction of the rod body of the limit rod, and at the same time the lifting block slides on the lifting slide rod, controlling the cleaning block and the limit block to move in the liquefaction channel, and cooperating with the cleaning brush to clean the liquefaction channel.

[0009] Preferably, the distillation assembly includes a distillation tank connected to a recovery tank at the top through a connecting pipe, a heating tube arranged at the bottom wall of the distillation tank, a stirring rod arranged at the bottom of the distillation tank along the axis of the distillation tank, a stirring bar with a spiral structure arranged on the side of the stirring rod, and a stirring member that drives the stirring rod to rotate.

[0010] Beneficial effects of the present invention:

[0011] 1. A spiral-shaped cooling and liquefaction component is used. A spiral liquefaction channel is formed between the cooling and liquefaction component and the recovery tank, which increases the contact time and contact area between the hydrofluoric acid vapor and the cooling surface, improves the liquefaction efficiency of the hydrofluoric acid, and enables the hydrofluoric acid vapor to be liquefied more fully.

[0012] 2. Cleaning the liquefaction channel by the cleaning component can effectively remove impurities on the inner wall of the liquefaction channel, ensure the smooth flow of the liquefaction channel, improve the recovery efficiency and quality of hydrofluoric acid, and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 This is a simplified structural diagram of the hydrofluoric acid distillation recovery device proposed in the present invention.

[0015] Figure 2 This is a schematic diagram of the structure of the hydrofluoric acid distillation recovery device proposed in the present invention when viewed from above.

[0016] Figure 3 It is a schematic diagram of the cross-sectional structure of the distillation assembly and recovery mechanism of the present invention.

[0017] Figure 4 This is a schematic diagram of the internal structure of the recovery tank of the present invention.

[0018] In the figure: 1. Distillation tank; 2. Recovery tank; 3. Connecting pipe; 4. Valve; 5. Liquid inlet pipe; 6. Liquid discharge pipe; 7. Heating tube; 8. Stirring rod; 9. Stirring bar; 10. Transmission rod; 11. Stirring motor; 12. Cooling bar; 13. Cleaning rod; 14. Limit rod; 15. Limit block; 16. Lifting slot; 17. Lifting slide rod; 18. Lifting block; 19. Fixing rod; 20. Cleaning block. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific embodiments and drawings. However, the following embodiments are only preferred embodiments of the present invention and are not exhaustive. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0020] Example 1: Reference Figure 1-Figure 3 The hydrofluoric acid distillation and recovery device shown includes a distillation component, a recovery mechanism, and a connecting pipe 3 connecting the distillation component and the recovery mechanism, the connecting pipe 3 is used to transport hydrofluoric acid vapor, the recovery mechanism includes a recovery tank 2, and a cooling and liquefaction component and a cleaning component arranged in the recovery tank 2, the cooling and liquefaction component has a spiral structure, and forms a spiral liquefaction channel between the recovery tank 2; the cleaning component is used to clean the inner wall of the liquefaction channel; in the liquefied state, the connecting pipe 3 transports hydrofluoric acid vapor to the recovery tank 2, the hydrofluoric acid vapor is liquefied on the inner wall of the liquefaction channel, and is collected at the bottom of the recovery tank 2; in the cleaning state: the connecting pipe 3 is closed, the cleaning component moves along a spiral route, cleans the hydrofluoric acid vapor liquefied impurities on the inner wall of the liquefaction channel, and collects them at the bottom of the recovery tank 2.

[0021] like Figures 1-4As shown, in the present embodiment, after the distillation assembly completes the distillation of hydrofluoric acid, the hydrofluoric acid vapor generated is transported to the recovery tank 2 through the connecting pipe 3. At this time, the cooling and liquefaction assembly is in working order. After the hydrofluoric acid vapor enters the recovery tank 2, it flows along the spiral liquefaction channel. Due to the cooling effect of the cooling and liquefaction assembly, the hydrofluoric acid vapor gradually cools down and liquefies into liquid hydrofluoric acid on the liquefaction channel inner wall. The liquid hydrofluoric acid flows downward along the liquefaction channel inner wall and finally converges at the bottom of the recovery tank 2, waiting for subsequent processing and utilization. The recovery tank 2 bottom is provided with a valve 4. Wherein the spiral liquefaction channel increases the contact area and contact time of the hydrofluoric acid vapor with the cooling surface, so that the hydrofluoric acid vapor can be cooled and liquefied more fully, thereby improving the recovery efficiency of hydrofluoric acid and reducing the waste of hydrofluoric acid. The uniform cooling process helps to improve the purity of the liquid hydrofluoric acid, avoids the decomposition of hydrofluoric acid or the mixing of impurities due to local overheating or uneven cooling, thereby ensuring the quality of the recovered hydrofluoric acid.

[0022] In the present embodiment, after the recovery mechanism liquefies the hydrofluoric acid steam for a long time, a certain amount of hydrofluoric acid steam liquefaction impurities are attached to the liquefaction channel inner wall, which can affect the recovery efficiency and quality of hydrofluoric acid. At this moment, the connecting pipe 3 (control switch is set on the connecting pipe 3) connecting the distillation assembly and the recovery mechanism is closed to stop the conveying of hydrofluoric acid steam and enter the clean state. The cleaning assembly starts working, and its various components cooperate with each other and move along the spiral path to clean the impurities on the liquefaction channel inner wall. The impurities cleaned are gradually gathered in the bottom of the recovery tank 2 along with the movement of the cleaning block. After cleaning, the impurities at the bottom of the recovery tank 2 can be cleaned. By regularly cleaning the liquefaction channel inner wall, the impurities attached to it can be removed in time, preventing the accumulation of impurities from causing the liquefaction channel to be blocked, ensuring that hydrofluoric acid steam can smoothly pass through the liquefaction channel and carry out cooling and liquefaction, ensuring the normal operation of the device. The clean liquefaction channel inner wall can keep a good cooling effect, so that hydrofluoric acid steam can be more efficiently liquefied, improving recovery efficiency. Simultaneously, reducing the pollution of impurities to hydrofluoric acid improves the quality of reclaiming hydrofluoric acid.

[0023] like Figure 3 and Figure 4 As shown, the cooling and liquefaction component includes a cooling strip 12 arranged along the axial direction of the recovery tank 2, a liquid inlet pipe 5 and a liquid discharge pipe 6 arranged on the recovery tank 2 and connected to both ends of the cooling strip 12, and a cooling member connecting the liquid inlet pipe 5 and the liquid discharge pipe 6. The cooling strip 12 has a spiral strip structure, and a cooling channel for the coolant to pass through is formed inside. The edge of the cooling strip 12 is in contact with the inner wall of the recovery tank 2, and a spiral liquefaction channel is formed between the cooling strip 12 and the recovery tank 2; the cooling member controls the coolant to enter the cooling channel through the liquid inlet pipe 5 to cool and liquefy the hydrofluoric acid vapor, and then returns to the cooling member through the liquid discharge pipe 6 to circulate and cool and liquefy the hydrofluoric acid vapor.

[0024] In the present embodiment, after hydrofluoric acid steam enters in recovery tank 2 by connecting pipe 3, and before flowing in liquefaction channel, cooling assembly control cooling liquid (cooling liquid adopts water) enters in cooling channel by liquid inlet pipe 5, cooling strip 12 is carried out circulation cooling, hydrofluoric acid steam is in liquefaction channel internal flow process, now the temperature in hydrofluoric acid steam is delivered on cooling strip 12 outer walls contacted with hydrofluoric acid steam, the heat in hydrofluoric acid steam is absorbed by cooling liquid by cooling strip 12, thereby liquefies into liquid hydrofluoric acid gradually, wherein the spiral strip structure of cooling strip 12 greatly increases the contact area between cooling liquid and hydrofluoric acid steam.Compared linear structure, spiral structure enables cooling liquid to carry out heat exchange with more hydrofluoric acid steam in limited space, improves cooling efficiency, and hydrofluoric acid steam can be liquefied more rapidly.Cooling liquid flows in spiral cooling channel, and path grows, thereby prolongs the contact time with hydrofluoric acid steam. This helps to fully absorb the heat of the hydrofluoric acid vapor, ensure that the hydrofluoric acid vapor can be fully liquefied, and improve the recovery rate of hydrofluoric acid. After the heat exchange is completed, the temperature of the coolant rises, and it flows out from the drain pipe 6 at the other end of the cooling strip 12 and returns to the cooling element. The cooling element cools the heated coolant to reduce the temperature so that the cooled coolant can be subsequently sent into the cooling channel through the liquid inlet pipe 5. This cycle continues to cool and liquefy the hydrofluoric acid vapor.

[0025] like Figure 3 and Figure 4 Shown, in the present embodiment, cooling strip 12 edge parts are fitted with recovery tank 2 inwalls, not only played the effect of transmitting cold capacity, also played certain supporting role to recovery tank 2 internal structure, strengthened the stability of recovery tank 2.Simultaneously, this fitting mode helps to form relatively sealed spiral liquefaction channel, prevents hydrofluoric acid vapor from leaking, and guarantees the smooth progress of liquefaction process.Because cooling strip 12 is evenly distributed along recovery tank 2 axial directions, cooling liquid evenly flows in cooling channel, makes the temperature distribution in whole spiral liquefaction channel relatively uniform.This helps hydrofluoric acid vapor to cool and liquefy equably in liquefaction channel, avoids the situation of local overheating or insufficient cooling, and improves the quality and stability of hydrofluoric acid liquefaction.

[0026] Example 2: Since it is necessary to clean the inner wall of the spiral liquefaction channel, this example provides the following solution:

[0027] The cleaning component includes a limit rod 14 passed through the spiral gap of the cooling strip 12, a limit block 15 slidably mounted on the limit rod 14, a cleaning block 20 passed through the spiral gap of the cooling strip 12 and in contact with the inner wall of the liquefaction channel, and a control component for adjusting the limit block 15 to slide on the rod body of the limit rod 14. The limit rod 14 has a spiral structure. The control component adjusts the limit block 15 to slide along the rod body of the limit rod 14, driving the cleaning block 20 to move along a spiral route in the spiral gap of the cooling strip 12 to clean the inner wall of the liquefaction channel.

[0028] like Figure 3 and Figure 4 As shown, in this embodiment, after a certain amount of hydrofluoric acid vapor liquefied impurities accumulate on the inner wall of the liquefaction channel, the connecting pipe 3 connecting the distillation component and the recovery mechanism is closed, stopping the transportation of hydrofluoric acid vapor. The control component is activated and is ready to adjust the sliding of the limit block 15. The control component starts to operate, generating a force through the internal mechanical structure or power system (such as a motor, transmission device, etc.) to act on the limit block 15. Under the action of the control component, the limit block 15 begins to slide along the rod body of the limit rod 14 with a spiral structure. Since the limit rod 14 is inserted into the spiral gap of the cooling strip 12, the sliding path of the limit block 15 also follows the spiral direction. The cleaning block 20 is also inserted into the spiral gap of the cooling strip 12, so that the sliding of the limit block 15 can drive the cleaning block 20 to move. As the limit block 15 slides along the spiral limit rod 14, the cleaning block 20 also moves along the spiral route within the spiral gap of the cooling strip 12. Cleaning block 20 is in the process of moving, because it fits with liquefaction channel inner wall, can produce the effects such as scraping and pushing to the impurities on liquefaction channel inner wall.Under the effect of cleaning block 20, impurities gradually fall off from liquefaction channel inner wall, and along with the moving direction of cleaning block 20, are downwardly gathered in the bottom of recovery tank 2 along liquefaction channel inner wall.When limit block 15 slides to the preset position along limit rod 14, after completing the cleaning stroke to liquefaction channel inner wall, control part stops operation, limit block 15 stops sliding, and cleaning block 20 also stops moving.At this point, can clean up the impurities at recovery tank 2 bottom as needed, after cleaning is completed, device can be switched to liquefied state again, continues the recovery work of hydrofluoric acid vapor.

[0029] In the present embodiment, the cleaning block 20 is fitted with the inner wall of the liquefaction channel and moves along a spiral path under the action of the control member, the limit block 15 and the limit rod 14, which can carry out a comprehensive and meticulous cleaning of the inner wall of the liquefaction channel, effectively removing the hydrofluoric acid vapor liquefaction impurities attached to the inner wall, and preventing the accumulation of impurities from affecting the recovery efficiency and quality of hydrofluoric acid. And timely removing impurities from the inner wall of the liquefaction channel can avoid impurities blocking the channel, ensuring that hydrofluoric acid vapor can flow smoothly in the liquefaction channel, ensuring the normal operation of the device, and reducing equipment failures and maintenance costs caused by channel blockage. The control member adjusts the sliding of the limit block 15, and then drives the cleaning block 20 to move, realizing the automation of the cleaning process. No manual cleaning is required, reducing the labor intensity and safety risks of manual operation, and improving cleaning efficiency and the convenience of operation. Regularly cleaning the inner wall of the liquefaction channel can reduce the corrosion and wear of impurities on the inner wall of the cooling strip 12 and the recovery tank 2, extending the service life of the cooling strip 12 and the recovery tank 2, and reducing the overall cost of use of the device.

[0030] like Figure 4 As shown, the control component includes a cleaning rod 13 arranged along the axis direction of the recovery tank 2 and passing through the cooling bar 12, a lifting slide 17 passing through the lifting groove 16 provided on the rod body of the cleaning rod 13, a lifting block 18 slidably sleeved on the lifting slide 17, a fixed rod 19 fixedly connected to the lifting block 18 and the opposite surface of the limit block 15, and a control structure for adjusting the rotation of the cleaning rod 13 around the axis, and a cleaning brush that fits the inner wall of the liquefaction channel is provided on the fixed rod 19 and the cleaning block 20; when the control structure drives the cleaning rod 13 to rotate, the limit block 15 slides along the rod body direction of the limit rod 14, and at the same time, the lifting block 18 slides on the lifting slide 17, controlling the cleaning block 20 and the limit block 15 to move in the liquefaction channel, and cooperating with the cleaning brush to clean the liquefaction channel, wherein the recovery tank 2 is provided with a rotating motor that drives the cleaning rod 13 to rotate.

[0031] like Figure 3 and Figure 4 As shown, in this embodiment, when the liquefaction channel is being cleaned, the rotating motor drives the cleaning rod 13 to rotate. Since the fixed rod 19 is connected to the lifting block 18 and the limit block 15, and the lifting block 18 is slidably mounted on the lifting slide 17, the lifting slide 17 is in turn inserted into the lifting groove 16 provided on the rod body of the cleaning rod 13. Driven by the rotation of the cleaning rod 13, the limit block 15 begins to slide along the direction of the rod body of the spiral structure limit rod 14 through the transmission of the fixed rod 19. At the same time, as the cleaning rod 13 rotates, the lifting block 18 also slides on the lifting slide 17. This is because during the rotation of the cleaning rod 13, the position of the lifting groove 16 changes, causing the relative position of the lifting block 18 on the lifting slide 17 to change, thereby achieving the sliding of the lifting block 18.

[0032] The sliding of the limit block 15 and the sliding of the lifting block 18 cooperate with each other to drive the cleaning block 20 to move along a spiral route within the spiral gap of the cooling strip 12. The cleaning brushes provided on the cleaning block 20 and the fixed rod 19 fit in contact with the inner wall of the liquefaction channel. During the movement of the cleaning block 20, the cleaning brushes scrape and clean the inner wall of the liquefaction channel, removing impurities attached to the inner wall. The impurities removed by the cleaning brushes, as the cleaning block 20 moves, move downward along the inner wall of the liquefaction channel and gather at the bottom of the recovery tank 2. When the cleaning rod 13 rotates to a preset angle or completes a predetermined cleaning stroke, the control structure stops operating, the cleaning rod 13 stops rotating, and the limit block 15, the lifting block 18 and the cleaning block 20 also stop moving, and the cleaning process ends. At this time, the impurities at the bottom of the recovery tank 2 can be cleaned.

[0033] In this embodiment, the control structure drives the cleaning rod 13 to rotate, thereby causing the limit block 15, the lifting block 18 and the cleaning block 20 to move in coordination. The cleaning block 20 can move along the inner wall of the spiral liquefaction channel, and the cleaning brush can comprehensively clean all parts of the inner wall of the liquefaction channel to ensure that there are no cleaning dead corners and effectively remove impurities. By controlling the rotation angle and speed of the cleaning rod 13, the moving path and cleaning speed of the cleaning block 20 can be flexibly controlled. According to the accumulation of impurities on the inner wall of the liquefaction channel, the cleaning parameters are adjusted to achieve precise cleaning and improve cleaning efficiency and quality. The cleaning brushes provided on the fixed rod 19 and the cleaning block 20 fit closely with the inner wall of the liquefaction channel. During the movement of the cleaning block 20, the cleaning brush can fully scrape the inner wall to remove stubborn impurities, thereby enhancing the cleaning effect and ensuring the smooth flow of the liquefaction channel and the normal recovery of hydrofluoric acid.

[0034] Example 3: In view of the problem of uneven heating during distillation in the prior art, this example provides the following solution:

[0035] The distillation assembly includes a distillation tank 1 connected to a recovery tank 2 at the top through a connecting pipe 3, a heating tube 7 arranged at the bottom wall of the distillation tank 1, a stirring rod 8 arranged at the bottom of the distillation tank 1 along the axial direction of the distillation tank 1, a stirring bar 9 with a spiral structure arranged on the side of the stirring rod 8, and a stirring member that drives the stirring rod 8 to rotate.

[0036] In this embodiment, the heating tube 7 has a spiral structure and is located near the bottom inner wall of the distillation tank 1. When the stirring member drives the stirring rod 8 to rotate, the stirring bar 9 rotates, driving the waste liquid to move downward. At this time, the waste liquid passes through the edge of the stirring bar 9 and moves upward to the position of the heating tube 7, which facilitates uniform heating of the waste liquid.

[0037] like Figure 3As shown, in this embodiment, a transmission rod 10 is provided on the side of the distillation tank 1, and the transmission rod 10 is rotatably connected to the top of the stirring rod 8. A stirring motor 11 is provided on the transmission rod 10, and a transmission structure is provided inside the transmission rod 10, so that the stirring rod 8 can be driven to rotate by the stirring motor 11.

[0038] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydrofluoric acid distillation recovery device, comprising a distillation component, a recovery mechanism, and a connecting pipe (3) connecting the distillation component and the recovery mechanism, wherein the connecting pipe (3) is used to transport hydrofluoric acid vapor, and is characterized in that: The recovery mechanism comprises a recovery tank (2), and a cooling liquefaction component and a cleaning component arranged in the recovery tank (2). The cooling and liquefaction component has a spiral structure and forms a spiral liquefaction channel with the recovery tank (2); the cleaning component is used to clean the inner wall of the liquefaction channel; In the liquefied state, the connecting pipe (3) transports the hydrofluoric acid vapor into the recovery tank (2), and the hydrofluoric acid vapor is liquefied on the inner wall of the liquefaction channel and collected at the bottom of the recovery tank (2); In the cleaning state: the connecting pipe (3) is closed, and the cleaning component moves along a spiral path to clean the hydrofluoric acid vapor liquefied impurities on the inner wall of the liquefaction channel and collect them at the bottom of the recovery tank (2).

2. The hydrofluoric acid distillation recovery device according to claim 1, wherein: The cooling liquefaction component comprises a cooling strip (12) arranged along the axis direction of the recovery tank (2), a liquid inlet pipe (5) and a liquid discharge pipe (6) arranged on the recovery tank (2) and connected to both ends of the cooling strip (12), and a cooling member connecting the liquid inlet pipe (5) and the liquid discharge pipe (6); the cooling strip (12) is in a spiral strip structure, and a cooling channel for the coolant to pass through is formed inside; the edge of the cooling strip (12) is in contact with the inner wall of the recovery tank (2), and a spiral liquefaction channel is formed between the cooling strip (12) and the recovery tank (2); The cooling element controls the cooling liquid to enter the cooling channel through the liquid inlet pipe (5) to cool and liquefy the hydrofluoric acid vapor, and then returns to the cooling element through the liquid discharge pipe (6) to circulate and cool and liquefy the hydrofluoric acid vapor.

3. The hydrofluoric acid distillation recovery device according to claim 2, wherein: The cleaning assembly comprises a limiting rod (14) passing through the spiral gap of the cooling strip (12), a limiting block (15) slidably sleeved on the limiting rod (14), a cleaning block (20) passing through the spiral gap of the cooling strip (12) and abutting against the inner wall of the liquefaction channel, and a control member for adjusting the limiting block (15) to slide on the rod body of the limiting rod (14); the limiting rod (14) is a spiral structure; The control member adjusts the limit block (15) to slide along the rod body of the limit rod (14), driving the cleaning block (20) to move along a spiral route in the spiral gap of the cooling strip (12) to clean the inner wall of the liquefaction channel.

4. The hydrofluoric acid distillation recovery device according to claim 3, wherein: The control component comprises a cleaning rod (13) arranged along the axis direction of the recovery tank (2) and passing through the cooling bar (12), a lifting slide rod (17) passing through a lifting groove (16) provided on the rod body of the cleaning rod (13), a lifting block (18) slidingly sleeved on the lifting slide rod (17), a fixed rod (19) fixedly connected to the lifting block (18) and the opposite surface of the limit block (15), and a control structure for adjusting the rotation of the cleaning rod (13) around the axis, and a cleaning brush that fits the inner wall of the liquefaction channel is provided on the fixed rod (19) and the cleaning block (20); When the control structure drives the cleaning rod (13) to rotate, the limiting block (15) slides along the rod body direction of the limiting rod (14), and at the same time, the lifting block (18) slides on the lifting slide bar (17), controlling the cleaning block (20) and the limiting block (15) to move in the liquefaction channel, and cooperating with the cleaning brush to clean the liquefaction channel.

5. The hydrofluoric acid distillation recovery device according to any one of claims 1 to 4, characterized in that: The distillation assembly comprises a distillation tank (1) connected to a recovery tank (2) at its top via a connecting pipe (3), a heating pipe (7) arranged at the bottom wall of the distillation tank (1), a stirring rod (8) arranged at the bottom of the distillation tank (1) along the axis of the distillation tank (1), a stirring bar (9) with a spiral structure arranged on the side of the stirring rod (8), and a stirring element for driving the stirring rod (8) to rotate.

Images