Electrolyte impurity removal device based on lead electrolysis generation

Abstract

The application relates to the technical field of lead battery electrolyte solvent dewatering and impurity removal, and discloses an electrolyte impurity removal device based on lead electrolysis, which comprises an impurity removal tank, an upper positioning ring and a lower positioning ring are arranged above and below the center of the inside of the impurity removal tank, a dewatering molecular sieve is arranged between the upper positioning ring and the lower positioning ring, a liquid guiding mechanism is arranged at the top end in the impurity removal tank, a dewatering molecular sieve rotating driving mechanism is arranged at the lower end in the impurity removal tank, and a liquid scraping mechanism is further arranged in the impurity removal tank. The electrolyte impurity removal device can improve the quality of electrolyte, increase the efficiency and stability of the electrolysis process, reduce the maintenance cost and operation complexity, is a useful tool for improving the production efficiency and quality in the electrolysis industry, and the comprehensive action of the innovative design and functional components of the device brings many benefits to the electrolysis industry, from improving the production efficiency to reducing the cost and reducing the environmental impact, so that the device becomes a valuable industrial equipment.

Description

Technical Field

[0001] This invention relates to the field of lead-acid battery electrolyte solvent dehydration and impurity removal technology, specifically to an electrolyte dehydration and impurity removal device based on lead electrolysis. Background Technology

[0002] Lead electrolysis is a common and important process in the metal extraction and electroplating industries. It typically involves using an electrolyte to reduce metal ions to metal and deposit it on electrodes. However, these electrolytes often contain harmful impurities such as metal ions, solid particles, and other contaminants, which can affect electrolyte levels and efficiency. Therefore, electrolyte deimpurification is a critical step in the electrolysis industry.

[0003] Traditional electrolyte impurity removal devices typically have the following shortcomings:

[0004] Efficiency issues: Traditional devices have limited electrolyte impurity removal efficiency and cannot efficiently remove various impurities from the electrolyte, which may lead to instability and inefficiency in the electrolysis process.

[0005] Operational complexity: Traditional devices typically require frequent manual intervention and maintenance, including manual replacement of filter media and removal of impurities, which increases operational complexity and cost.

[0006] Consistency of impurity removal: The impurity removal operation of traditional equipment may result in inconsistent impurity removal effects due to uneven electrolyte flow and impurity distribution.

[0007] Maintenance and replacement are difficult: Traditional impurity removal devices are often not conveniently designed, and replacing key components such as dewatering molecular sieves requires a lot of maintenance work and downtime.

[0008] Electrolyte loss: Some traditional devices may cause unnecessary loss of electrolyte, which increases costs and wastes resources.

[0009] In summary, traditional electrolyte deimpurification devices suffer from various shortcomings in terms of efficiency, operability, maintenance, and impurity removal, necessitating innovative solutions to improve the efficiency and quality of the electrolysis industry. The aforementioned electrolyte deimpurification device based on lead electrolysis significantly improves upon these issues through its unique design and mechanism, providing more efficient, convenient, and stable electrolyte deimpurification operations. Summary of the Invention

[0010] (a) Technical problems to be solved

[0011] To address the shortcomings of existing technologies, this invention provides an electrolyte impurity removal device based on lead electrolysis. This device offers advantages such as efficient electrolyte impurity removal and filtration, reduced waste and maintenance requirements, good filtration uniformity, optimized replacement of dewatering molecular sieves, and automated operation. It solves various problems in efficiency, operability, maintenance, and impurity removal associated with traditional electrolyte impurity removal devices.

[0012] (II) Technical Solution

[0013] To achieve the aforementioned goal of improving the efficiency and quality of the electrolysis industry, the present invention provides the following technical solution: an electrolyte removal device based on lead electrolysis, comprising a removal tank, wherein an upper positioning ring and a lower positioning ring are respectively installed above and below the center of the removal tank, a dehydrating molecular sieve is disposed between the upper positioning ring and the lower positioning ring, a liquid guiding mechanism is installed at the top of the removal tank, a dehydrating molecular sieve rotation drive mechanism is disposed at the lower end of the removal tank, and a liquid scraping mechanism is also disposed inside the removal tank;

[0014] The dehydrating molecular sieve includes:

[0015] Several concentrically and evenly distributed molecular filter elements;

[0016] The first positioning disk is positioned at the upper and lower ends of several molecular filter cores;

[0017] Several support balls are evenly embedded at the outer edge of the first positioning disc at the upper and lower ends. The support balls at the upper and lower ends roll and support the upper positioning ring and the lower positioning ring near the center.

[0018] The liquid inlet is located at the center of the first positioning plate above;

[0019] The liquid guiding mechanism includes:

[0020] A liquid pump is installed at the top center of the impurity removal tank;

[0021] A liquid guide tube is connected to the liquid outlet end of the liquid pump, and the bottom end of the liquid guide tube is connected to the liquid inlet.

[0022] An inlet pipe is connected to the liquid pump's pumping end and located at the top of the impurity removal tank;

[0023] The dewatering molecular sieve rotary drive mechanism includes:

[0024] A positioning component for providing positioning operation for the rotary operation of the dewatering molecular sieve;

[0025] Rotate the telescopic cylinder installed at the bottom center of the impurity removal tank, with the telescopic end of the telescopic cylinder abutting the bottom center of the positioning component;

[0026] A drive assembly installed on the bottom outer side of the impurity removal tank to drive the telescopic cylinder and positioning assembly above to rotate;

[0027] The scraping mechanism includes:

[0028] The scraping ring on the inner wall of the impurity removal tank is tightly fitted and scraped off.

[0029] The lifting drive assembly drives the scraper ring to move downwards from above to scrape off the electrolyte adhering to the wall of the impurity removal tank.

[0030] Preferably, the top of the scraper ring is uniformly provided with a plurality of guide posts, and the plurality of guide posts are slidably connected to the interior of the side positioning blocks provided on the side of the upper positioning ring, and the upper positioning ring is positioned on the inner wall of the impurity removal tank by the plurality of side positioning blocks.

[0031] Preferably, the bottom of the lower positioning ring is provided with four support pillars for supporting it, and the bottom ends of the four support pillars are fixed to the bottom of the impurity removal tank.

[0032] Preferably, the positioning component includes:

[0033] A second positioning plate is attached to the telescopic end of the telescopic cylinder;

[0034] Several positioning posts are evenly distributed on the top of the second positioning disk near the edge. These positioning posts are inserted into several positioning holes at the bottom of the second positioning disk when the entire dewatering molecular sieve rotary drive mechanism is in a rotary positioning state.

[0035] Preferably, the driving component includes:

[0036] A drive shaft is positioned at the center of the bottom of the telescopic cylinder;

[0037] A drive gear and a transmission gear are located at the bottom of the waste removal tank, wherein the transmission gear is connected to the bottom end of the drive shaft;

[0038] The drive gear and the transmission gear mesh with each other;

[0039] A drive motor used to drive the drive gear to rotate.

[0040] Preferably, the lifting drive assembly includes:

[0041] The drive screw is located inside the inner wall of the impurity removal tank;

[0042] A geared motor that drives the drive screw;

[0043] A threaded connection to the drive screw;

[0044] One end of the docking block is positioned on the side of the scraper ring.

[0045] Preferably, the impurity removal tank has a door installed on the front, and the door is located in front of the dewatering molecular sieve at the same height.

[0046] Preferably, an annular liquid collection tank is provided at the bottom of the impurity removal tank.

[0047] Preferably, a drain valve pipe is installed at the bottom of the impurity removal tank, the top end of the drain valve pipe is connected to the inside of the annular collection tank, and the other end of the impurity removal tank is connected to the outside of the impurity removal tank.

[0048] Preferably, the outer surface of the scraper ring is made of silicone material, which facilitates its adhesion to the inner wall of the impurity removal tank and ensures the integrity of the downward scraping.

[0049] Compared with the prior art, the present invention provides an electrolyte purification device based on lead electrolysis, which has the following advantages:

[0050] Highly efficient impurity removal and filtration of electrolyte: The device effectively filters and removes impurities from the electrolyte through the rotation of the dehydration molecular sieve, improving the quality of the electrolyte and thus helping to improve the efficiency and stability of the electrolysis process.

[0051] Positioning and Rotation Mechanism: The rotary drive mechanism and positioning components of the dewatering molecular sieve ensure stable positioning and rotation of the molecular sieve for efficient impurity removal. This helps ensure uniform contact of the electrolyte with the molecular filter element, improving filtration efficiency.

[0052] Reduced waste and maintenance requirements: The scraping mechanism assists in removing residual electrolyte from the inner wall of the electrolytic tank through the lifting drive component of the scraping ring, ensuring electrolyte quality and impurity removal efficiency, while reducing waste and maintenance requirements.

[0053] Good filtration uniformity: The liquid guiding mechanism guides the electrolyte to the molecular sieve, ensuring that the electrolyte flows evenly into the center of the molecular sieve. This guarantees the uniformity of the initial liquid guiding, which in turn guarantees the uniformity of subsequent impurity removal and filtration, thereby achieving more effective impurity removal and filtration operations.

[0054] Optimized replacement operation of dewatering molecular sieve: The design of the device makes it relatively easy to replace the dewatering molecular sieve. Simply turn off the electrolyte supply and open the tank door to remove the dewatering molecular sieve, which helps with maintenance and ease of operation.

[0055] Automated operation: The mechanical components and drive components in the device are controlled automatically, which helps to reduce human intervention and improve the consistency and efficiency of operation.

[0056] In summary, this electrolyte deimpurification device can improve the quality of the electrolyte, increase the efficiency and stability of the electrolysis process, and reduce maintenance costs and operational complexity. It is a useful tool for improving production efficiency and quality in the electrolysis industry. At the same time, the innovative design and integrated function of this device bring many benefits to the electrolysis industry, from improving production efficiency to reducing costs and reducing environmental impact, making it a valuable piece of industrial equipment. Attached Figure Description

[0057] Figure 1 This is a schematic diagram of the structure of the present invention;

[0058] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0059] Figure 3 This is a schematic diagram of the explosive separation of the internal structure of the present invention;

[0060] Figure 4 This is a schematic diagram of the half-section structure of the dehydration molecular sieve of the present invention;

[0061] Figure 5 This is a schematic diagram of the connection structure between the positioning component and the telescopic cylinder of the present invention;

[0062] Figure 6 This is a schematic diagram of the structure of the driving component of the present invention;

[0063] Figure 7 This is a schematic diagram of the lifting drive assembly of the present invention.

[0064] The components include: 1. Impurity removal tank; 2. Dewatering molecular sieve; 3. Upper positioning ring; 4. Lower positioning ring; 5. Liquid guiding mechanism; 6. Dewatering molecular sieve rotary drive mechanism; 7. Annular liquid collection tank; 8. Drain valve pipe; 9. Scraping mechanism; 11. Tank door; 21. Molecular filter element; 22. First positioning plate; 23. Liquid inlet; 24. Support ball; 25. Positioning hole; 31. Side positioning block; 41. Support column; 51. Liquid guiding pipe; 52. Liquid pump; 53. Liquid inlet pipe; 61. Positioning assembly; 62. Telescopic cylinder; 63. Drive assembly; 611. Second positioning plate; 612. Positioning column; 631. Drive motor; 632. Drive gear; 633. Transmission gear; 634. Drive shaft; 91. Scraping ring; 92. Guide column; 93. Lifting drive assembly; 931. Gear motor; 932. Drive screw; 933. Connecting block. Detailed Implementation

[0065] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0066] Please see Figure 1-7 An electrolyte purification device based on lead electrolysis:

[0067] The impurity removal tank 1 includes an upper positioning ring 3 and a lower positioning ring 4 installed at the upper and lower sides of the center of the impurity removal tank 1, a dehydration molecular sieve 2 between the upper positioning ring 3 and the lower positioning ring 4, a liquid guiding mechanism 5 installed at the top of the impurity removal tank 1, a dehydration molecular sieve rotation drive mechanism 6 installed at the lower end of the impurity removal tank 1, and a scraping mechanism 9 installed inside the impurity removal tank 1.

[0068] Dehydrating molecular sieve 2 includes:

[0069] Several concentrically and evenly distributed molecular filter elements 21, compared with traditional flat-plate dewatering molecular sieves, this structure can effectively increase the filtration area, and the multi-layer filtration method can also improve the filtration efficiency.

[0070] The first positioning disk 22 is positioned at the upper and lower ends of several molecular filter cores 21;

[0071] Several support balls 24 are evenly embedded at the outer edge of the first positioning disk 22 at the upper and lower ends. The several support balls 24 at the upper and lower ends roll and support the upper positioning ring 3 and the lower positioning ring 4 near the center end face to ensure the flow of liquid in the subsequent rotating sieve operation.

[0072] The liquid inlet 23 is located at the center of the first positioning plate 22 above;

[0073] The liquid guiding mechanism 5 includes:

[0074] A liquid pump 52 is installed at the top center of the impurity removal tank 1;

[0075] A liquid guide pipe 51 is connected to the liquid outlet of the liquid pump 52, and the bottom end of the liquid guide pipe 51 is connected to the liquid inlet 23.

[0076] The inlet pipe 53, which is connected to the liquid pump 52 and located at the top of the impurity removal tank 1, helps to guide the electrolyte to the molecular sieve and ensures that the electrolyte flows in evenly.

[0077] Dewatering molecular sieve rotary drive mechanism 6, this drive mechanism is used to rotate the dewatering molecular sieve 2:

[0078] Positioning component 61 is used to provide positioning operation for the rotary operation of dewatering molecular sieve 2;

[0079] The telescopic cylinder 62, which is installed at the bottom center of the impurity removal tank 1, is rotated. The telescopic end of the telescopic cylinder 62 is connected to the bottom center of the positioning component 61. It can lift the positioning component 61 to the bottom of the dewatering molecular sieve 2 and perform positioning operation during the rotation impurity removal operation.

[0080] The drive assembly 63, installed at the bottom of the outer side of the impurity removal tank 1, is used to drive the upper telescopic cylinder 62 and the positioning assembly 61 to rotate. This combination allows the molecular sieve to be rotated to increase the impurity removal efficiency.

[0081] The scraping mechanism 9 includes:

[0082] The scraping ring 91, which fits tightly against and scrapes the inner wall of the impurity removal tank 1, has its outer surface made of silicone material, which makes it easy to fit against the inner wall of the impurity removal tank 1 and ensures the integrity of the downward scraping.

[0083] The lifting drive assembly 93 drives the scraper ring 91 to move downwards from above to scrape off the electrolyte adhering to the wall of the impurity removal tank 1.

[0084] The top of the scraper ring 91 is evenly provided with several guide posts 92. The guide posts 92 are slidably connected to the inside of several side positioning blocks 31 provided on the side of the upper positioning ring 3. The multiple guide posts 92 can ensure the stability of the scraper ring 91 during lifting and lowering operations. The upper positioning ring 3 is positioned on the inner wall of the impurity removal tank 1 by several side positioning blocks 31.

[0085] The bottom of the lower positioning ring 4 is provided with four support pillars 41 for supporting it, and the bottom ends of the four support pillars 41 are fixed to the bottom of the impurity removal tank 1.

[0086] Positioning component 61 includes:

[0087] The second positioning plate 611 is connected to the telescopic end of the telescopic cylinder 62;

[0088] Several positioning posts 612 are evenly distributed on the top of the second positioning disk 611 near the edge. These positioning posts 612 are inserted into several positioning holes 25 at the bottom of the first positioning disk 22 below during the rotational positioning state of the entire dewatering molecular sieve rotational drive mechanism 6, thereby ensuring that the dewatering molecular sieve 2 can rotate with the positioning component 61.

[0089] Driver component 63 includes:

[0090] A drive shaft 634 is connected to the center of the bottom of the telescopic cylinder 62;

[0091] The drive gear 632 and transmission gear 633 are located at the bottom of the miscellaneous tank 1, wherein the transmission gear 633 is connected to the bottom end of the drive shaft 634;

[0092] The drive gear 632 and the transmission gear 633 mesh with each other;

[0093] Drive motor 631 used to drive drive gear 632 to rotate.

[0094] The lifting drive assembly 93 includes:

[0095] Drive screw 932 located inside the inner wall of the impurity removal tank 1;

[0096] The geared motor 931 drives the lead screw 932;

[0097] A mating block 933 is threaded onto the drive screw 932;

[0098] One end of the docking block 933 is positioned on the side of the scraper ring 91.

[0099] The front of the impurity removal tank 1 is equipped with a tank door 11, which is located in front of the dewatering molecular sieve 2 at the same height, so as to facilitate the subsequent removal and replacement of the dewatering molecular sieve 2.

[0100] An annular liquid collection tank 7 is provided at the bottom of the impurity removal tank 1, which can effectively collect the electrolyte after screening above.

[0101] A drain valve pipe 8 is installed at the bottom of the impurity removal tank 1. The top end of the drain valve pipe 8 is connected to the inside of the annular collection tank 7, and the other end of the impurity removal tank 1 is connected to the outside of the impurity removal tank 1.

[0102] Electrolyte impurity removal and filtration operation:

[0103] The electrolyte is first drawn into the inlet pipe 53 by the pump 52 in the liquid guiding mechanism 5, and then guided into the inlet 23 of the dewatering molecular sieve 2 through the liquid guiding pipe 51.

[0104] The dewatering molecular sieve rotation drive mechanism 6 is activated, and the telescopic cylinder 62 drives the positioning component 61 to the bottom of the dewatering molecular sieve 2. During this process, the dewatering molecular sieve 2 is rotated so that several positioning holes 25 at its bottom are aligned with several positioning posts 612 at the top of the second positioning disk 611. Finally, the several positioning posts 612 are fully inserted into the several positioning holes 25, completing the operation. Subsequently, the drive motor 631 in the drive component 63 drives the drive shaft 634 to rotate through the drive gear 632 and the transmission gear 633. This ultimately drives the telescopic cylinder 62 and the positioning component 61 above to rotate, thus realizing the rotation of the dewatering molecular sieve 2 and enabling the molecular filter element 21 to perform the filtering function and remove impurities from the electrolyte.

[0105] The filtered electrolyte flows down the inner wall of the impurity removal tank 1 into the annular collection tank 7.

[0106] Scraping operation:

[0107] The scraping ring 91 in the scraping mechanism 9 fits tightly against the inner wall of the impurity removal tank 1 and drives the reduction motor 931 in the lifting drive assembly 93 to drive the drive screw 932 to rotate, thereby driving the docking block 933 to slide downward slowly, which in turn drives the scraping ring 91 to slide downward along the inner wall.

[0108] At this point, the electrolyte residue remaining on the inner wall of the impurity removal tank is scraped off and flows into the annular collection tank 7.

[0109] The electrolyte is eventually discharged through drain valve pipe 8.

[0110] After the impurity removal operation, the dehydrated molecular sieve is removed and replaced.

[0111] In order to remove and replace the dehydrated molecular sieve 2, the electrolyte supply must first be turned off.

[0112] There is a door 11 on the front of the impurity removal tank. Opening the door 11 allows the dewatering molecular sieve 2 to be removed.

[0113] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for removing impurities from electrolyte based on lead electrolysis, comprising an impurity removal tank (1), characterized in that: The upper and lower sides of the center of the impurity removal tank (1) are respectively provided with an upper positioning ring (3) and a lower positioning ring (4), a dehydration molecular sieve (2) is arranged between the upper positioning ring (3) and the lower positioning ring (4), a liquid guiding mechanism (5) is arranged at the top end of the impurity removal tank (1), a dehydration molecular sieve rotating driving mechanism (6) is arranged at the lower end of the impurity removal tank (1), and a liquid scraping mechanism (9) is further arranged in the impurity removal tank (1). The dehydration molecular sieve (2) comprises: A plurality of concentrically and uniformly distributed molecular filter cores (21); A first positioning disc (22) positioned on the upper and lower ends of the plurality of molecular filter cores (21); A plurality of support balls (24) uniformly embedded on the outer side surface edge of the first positioning disc (22) on the upper and lower ends, and a plurality of support balls (24) on the upper and lower sides are correspondingly rolled and supported on the end surfaces of the upper positioning ring (3) and the lower positioning ring (4) close to the center; A liquid inlet (23) arranged at the center of the upper first positioning disc (22); The liquid guiding mechanism (5) comprises: A liquid pumping pump (52) mounted at the top center of the impurity removal tank (1); A liquid guiding pipe (51) connected to the liquid outlet end of the liquid pumping pump (52), and the bottom end of the liquid guiding pipe (51) is communicated with the liquid inlet (23); A liquid inlet pipe (53) connected to the liquid pumping end of the liquid pumping pump (52) and located at the top of the impurity removal tank (1); The dehydration molecular sieve rotating driving mechanism (6) comprises: A positioning assembly (61) for providing positioning operation for the rotation operation of the dehydration molecular sieve (2); A telescopic air cylinder (62) rotatably mounted at the bottom center of the impurity removal tank (1), and the telescopic end of the telescopic air cylinder (62) is connected to the bottom center of the positioning assembly (61); A driving assembly (63) mounted on the outer bottom of the impurity removal tank (1) to drive the upper telescopic air cylinder (62) and the positioning assembly (61) to rotate; The liquid scraping mechanism (9) comprises: A liquid scraping ring (91) closely attached to and scraping the inner wall of the impurity removal tank (1); A lifting driving assembly (93) driving the liquid scraping ring (91) to move upward and downward to scrape the electrolyte attached to the tank wall of the impurity removal tank (1).

2. The impurity removal device based on the electrolyte generated by lead electrolysis according to claim 1, characterized in that: The top of the liquid scraping ring (91) is uniformly provided with a plurality of guide columns (92), and a plurality of guide columns (92) are correspondingly slidably connected to the inside of a plurality of side positioning blocks (31) arranged on the side surface of the upper positioning ring (3), and the upper positioning ring (3) is positioned on the inner wall of the impurity removal tank (1) through a plurality of side positioning blocks (31).

3. The impurity removal device based on electrolyte generated by lead electrolysis according to claim 1, characterized in that: The bottom of the lower positioning ring (4) is provided with four support columns (41) for supporting it, and the bottom ends of the four support columns (41) are fixed to the bottom of the impurity removal tank (1).

4. The impurity removal device based on electrolyte generated by lead electrolysis according to claim 1, characterized in that: The positioning assembly (61) comprises: A second positioning disc (611) connected to the telescopic end of the telescopic air cylinder (62); A plurality of positioning columns (612) are evenly distributed on the top of the second positioning disc (611) near the edge, and a plurality of positioning columns (612) are correspondingly inserted into a plurality of positioning holes (25) arranged on the bottom of the first positioning disc (22) in the rotating positioning state of the dehydration molecular sieve rotating drive mechanism (6).

5. The impurity removal device based on electrolyte generated by lead electrolysis according to claim 1, characterized in that: The drive assembly (63) comprises: a drive shaft (634) which is connected to the bottom center of the telescopic air cylinder (62); a drive gear (632) and a transmission gear (633) which are located at the outer bottom of the impurity removal tank (1), wherein the transmission gear (633) is connected to the bottom end of the drive shaft (634); the drive gear (632) and the transmission gear (633) are engaged; a drive motor (631) which is used to drive the drive gear (632) to rotate.

6. The impurity removal device based on electrolyte generated by lead electrolysis according to claim 1, characterized in that: The lifting drive assembly (93) comprises: a drive screw (932) which is located inside the inner wall of the impurity removal tank (1); a speed reducer motor (931) which drives the drive screw (932); an adapter block (933) which is screwed onto the drive screw (932); one end of the adapter block (933) is located on the side of the liquid scraping ring (91).

7. The impurity removal device based on electrolyte generated by lead electrolysis according to claim 1, characterized in that: The front of the impurity removal tank (1) is provided with a tank door (11), and the position of the tank door (11) is located in front of the height of the dehydration molecular sieve (2).

8. The impurity removal device based on electrolyte generated by lead electrolysis according to claim 1, characterized in that: The inner bottom of the impurity removal tank (1) is provided with an annular liquid collecting groove (7).

9. The impurity removal device based on electrolyte generated by lead electrolysis according to claim 8, characterized in that: The bottom of the impurity removal tank (1) is provided with a liquid discharge valve pipe (8), and the top of the liquid discharge valve pipe (8) is communicated with the inside of the annular liquid collecting groove (7).

10. The impurity removal device based on electrolyte generated by lead electrolysis according to claim 1, characterized in that: The outer surface of the liquid scraping ring (91) is made of silica gel material, which is convenient for it to adhere to the inner wall of the impurity removal tank (1), and ensures the completeness of the downward liquid scraping.

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