Rare earth recovery device for rare earth wastewater solution

Abstract

The utility model relates to a rare earth recovery device, belongs to the technical field of rare earth recovery, and particularly relates to a rare earth recovery device for rare earth wastewater solution, which comprises a cooling box, a top cover is fixedly connected onto the cooling box, a precipitation cylinder is fixedly connected onto the top cover, and a feeding pipe is fixedly connected onto the top cover; according to the praseodymium neodymium oxalate crystal discharging device, the sliding groove, the sliding block, the filter screen, the rotating shaft and the hydraulic rod are matched, the hydraulic rod is used for driving the filter screen to move upwards, praseodymium neodymium oxalate crystals move upwards along with the filter screen, the praseodymium neodymium oxalate crystals are separated from rare earth waste water through the filter screen, and the situation that waste water rare earth is discharged when the praseodymium neodymium oxalate crystals are discharged is effectively avoided; through cooperation of the protective shell, the motor, the rotating shaft, the scraping strip and the scraping plate, the motor is used for driving the scraping strip to rotate to prevent praseodymium neodymium oxalate crystals from blocking the filter screen, the scraping strip is used for driving the scraping plate to rotate to clean the inner wall of the precipitation barrel, and the praseodymium neodymium oxalate crystals are prevented from adhering to the inner wall of the precipitation barrel to cause waste.

Description

Technical Field

[0001] This utility model relates to the field of rare earth recovery technology, specifically a rare earth recovery device for rare earth wastewater solutions. Background Technology

[0002] In the rare earth production process, the wastewater generated by the oxalic acid precipitation process contains praseodymium oxalate and neodymium oxalate. Normal discharge would lead to the waste of praseodymium oxalate and neodymium oxalate resources, so rare earth recovery devices are needed to recover them.

[0003] Chinese Patent CN222781663U discloses a rare earth recovery device for rare earth wastewater solutions. The device includes a cooling tank with a sedimentation cylinder inside. The upper part of the sedimentation cylinder is sealed to the lower inner cavity of the cooling tank via a sealing plate. The opening of the sedimentation cylinder is connected to the upper inner cavity of the cooling tank. A feed pipe and a discharge pipe are symmetrically arranged at the upper part of the cooling tank. The feed pipe is connected to the middle side wall of the sedimentation cylinder, and the discharge pipe is connected to the upper inner cavity of the cooling tank. The discharge pipe of any cooling tank is connected to the feed pipe of the adjacent cooling tank. The sedimentation cylinder, placed in the cooling tank, can rapidly cool the rare earth wastewater, accelerating the crystallization of praseodymium oxalate in the wastewater, thereby accelerating the recovery of praseodymium oxalate. In addition, the filter screen filters praseodymium oxalate crystals to prevent excessive praseodymium oxalate crystals from entering the next cooling box. The praseodymium oxalate is recycled through multiple cooling boxes to prevent waste.

[0004] In the above technical solution, the discharge pipe is located at the top of the cooling tank. When the valve is opened to discharge praseodymium oxalate, the rare earth wastewater at the bottom of the sedimentation tank will be discharged along with it. The residual rare earth wastewater still contains a certain amount of praseodymium oxalate solution, resulting in poor recovery effect of the device.

[0005] Based on this, this utility model proposes a rare earth recovery device for rare earth wastewater solutions. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model proposes a rare earth recovery device for rare earth wastewater solutions. The device can move the filter screen upward by a hydraulic rod, so that the praseodymium oxalate crystals are separated from the rare earth wastewater, thereby effectively avoiding the discharge of rare earth wastewater when feeding praseodymium oxalate crystals.

[0007] The technical solution to achieve the purpose of this utility model is: a rare earth recovery device for rare earth wastewater solution, including a cooling tank, a top cover fixedly connected to the cooling tank, a sedimentation cylinder fixedly connected to the top cover, a feed pipe fixedly connected to the top cover, a sedimentation discharge pipe and a drain pipe fixedly connected to the sedimentation cylinder, and further including;

[0008] The two chutes are located inside the sedimentation tank. Two sliders are slidably connected to each of the two chutes. Filter screens are fixedly connected to the two sliders. A rotating shaft is rotatably connected to the filter screens. A hydraulic rod is fixedly connected to the top cover. The output shaft of the hydraulic rod is rotatably connected to the rotating shaft.

[0009] Preferably, a solenoid valve is fixedly connected to the feed pipe, and a solenoid valve is provided on the drain pipe.

[0010] Preferably, a protective shell is fixedly connected to the filter screen, and a motor is fixedly connected inside the protective shell, with the output shaft of the motor fixedly connected to a rotating shaft.

[0011] Preferably, the rotating shaft has two scraper blades connected to it, and two scraper plates are fixedly connected to each of the two scraper blades.

[0012] Preferably, the cooling tank is fixedly connected to an inlet pipe and an outlet pipe, and the sedimentation tank is fixedly connected to a cooling pipe, with both ends of the cooling pipe fixedly connected to the inlet pipe and the outlet pipe, respectively.

[0013] Preferably, the cooling box has multiple heat dissipation holes, and the cooling box is equipped with two fans.

[0014] Compared with existing technologies, the significant advantages of this invention are:

[0015] Firstly, in this utility model, the combination of a chute, a slider, a filter screen, a rotating shaft, and a hydraulic rod allows the hydraulic rod to drive the filter screen upward, causing the praseodymium oxalate crystals to move upward as well. The filter screen separates the crystals from the rare earth wastewater, effectively preventing the discharge of rare earth wastewater during the feeding of praseodymium oxalate crystals.

[0016] Secondly, in this utility model, the protective shell, motor, rotating shaft, scraper and scraper work together. The motor drives the scraper to rotate, which prevents praseodymium oxalate crystals from clogging the filter screen. The scraper drives the scraper to rotate, which cleans the inner wall of the sedimentation cylinder, thus avoiding the accumulation of praseodymium oxalate crystals on the inner wall of the sedimentation cylinder and causing waste. Attached Figure Description

[0017] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 This is a front sectional view of the structure of this utility model;

[0020] Figure 3 This is a right-side sectional view of the structure of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Cooling tank; 2. Sedimentation cylinder; 3. Top cover; 4. Feed pipe; 5. Solenoid valve one; 6. Sedimentation discharge pipe; 7. Drain pipe; 8. Solenoid valve two; 9. Slide chute; 10. Sliding block; 11. Filter screen; 12. Protective shell; 13. Motor; 14. Rotating shaft; 15. Scraper; 16. Scraper blade; 17. Hydraulic rod; 18. Water inlet pipe; 19. Cooling pipe; 20. Water outlet pipe; 21. Heat dissipation hole; 22. Fan. Detailed Implementation

[0023] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. 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 protection scope of the present invention.

[0024] This utility model provides an improved rare earth recovery device for rare earth wastewater solutions. The technical solution of this utility model is as follows:

[0025] like Figures 1-3 As shown, a rare earth recovery device for rare earth wastewater solution includes a cooling tank 1, a top cover 3 fixedly connected to the cooling tank 1, a sedimentation cylinder 2 fixedly connected to the top cover 3, a feed pipe 4 fixedly connected to the top cover 3, a sedimentation discharge pipe 6 and a drain pipe 7 fixedly connected to the sedimentation cylinder 2, the sedimentation discharge pipe 6 being higher than the drain pipe 7, and also includes;

[0026] Two chutes 9 are located inside the sedimentation cylinder 2. Two sliders 10 are slidably connected to each chute 9. Filter screens 11 are fixedly connected to the two sliders 10. A rotating shaft 14 is rotatably connected to the filter screens 11. A hydraulic rod 17 is fixed to the top cover 3 by bolts. The output shaft of the hydraulic rod 17 is fixed to the rotating shaft 14 by bolts. The hydraulic rod 17 drives the filter screens 11 to move upward, causing the praseodymium oxalate crystals to move upward as well. The crystals are then separated from the rare earth wastewater through the filter screens 11, effectively preventing the discharge of rare earth wastewater during the praseodymium oxalate crystallization process.

[0027] Furthermore, such as Figure 1 and Figure 2 As shown, a solenoid valve 5 is fixedly connected to the feed pipe 4, and a solenoid valve 8 is provided on the drain pipe 7. When it is necessary to feed praseodymium oxalate crystals, the solenoid valve 5 is closed first, and then the solenoid valve 8 is opened.

[0028] Furthermore, such as Figure 2 and Figure 3As shown, a protective shell 12 is fixedly connected to the filter screen 11. A motor 13 is fixed inside the protective shell 12 by bolts. The output shaft of the motor 13 is fixed to the rotating shaft 14 by bolts. The motor 13 drives the scraper 15 and scraper 16 to rotate.

[0029] Furthermore, such as Figure 2 and Figure 3 As shown, two scraper blades 15 are connected to the rotating shaft 14. The two scraper blades 15 are symmetrical about the rotating shaft 14. Two scraper plates 16 are fixedly connected to the two scraper blades 15 respectively. The motor 13 drives the scraper blades 15 to rotate, preventing praseodymium oxalate crystals from clogging the filter screen 11. The scraper blades 15 drive the scraper plates 16 to rotate, cleaning the inner wall of the sedimentation cylinder 2 and preventing praseodymium oxalate crystals from adhering to the inner wall of the sedimentation cylinder 2, thus avoiding waste.

[0030] Furthermore, such as Figures 1-3 As shown, an inlet pipe 18 and an outlet pipe 20 are fixedly connected to the cooling tank 1, and a cooling pipe 19 is fixedly connected to the sedimentation cylinder 2. The cooling pipe 19 is wound around the sedimentation cylinder 2, and the two ends of the cooling pipe 19 are fixedly connected to the inlet pipe 18 and the outlet pipe 20, respectively. Cold water is injected through the inlet pipe 18, and the cold water flows rapidly along the cooling pipe 19 to absorb heat and cool the rare earth wastewater.

[0031] Furthermore, such as Figures 1-3 As shown, the cooling box 1 has multiple heat dissipation holes 21 and two fans 22 inside the cooling box 1. The fans 22 are used to accelerate airflow and speed up the cooling of rare earth wastewater.

[0032] The specific working method is as follows: Rare earth wastewater is poured into sedimentation tank 2 through feed pipe 4, and cold water is injected into water inlet pipe 18. The cold water flows rapidly along cooling pipe 19, absorbing heat and cooling the rare earth wastewater. At the same time, fan 22 is started to accelerate airflow and speed up the cooling of rare earth wastewater. After cooling, praseodymium oxalate crystals in the rare earth wastewater precipitate above filter screen 11. When it is necessary to feed the praseodymium oxalate crystals, solenoid valve 5 is closed, and hydraulic rod 17 is started. Its output shaft drives rotating shaft 14. As the filter screen 11 moves upward, it also moves upward, causing the praseodymium oxalate crystals to move upward. After the filter screen 11 gradually moves away from the drain pipe 7, the solenoid valve 8 is opened, so that the wastewater filtered by the filter screen 11 falls to the bottom of the sedimentation cylinder 2 and is discharged through the drain pipe 7. The drain pipe 7 can be connected to the feed pipe 4 of another device to perform multiple sedimentation of the wastewater. The praseodymium oxalate crystals on the filter screen 11 move with the filter screen 11 to the sedimentation discharge pipe 6 and are discharged from the sedimentation discharge pipe 6, so that the praseodymium oxalate crystals are separated from the wastewater, avoiding the rare earth wastewater from being carried out.

[0033] The technical means disclosed in this utility model are not limited to those described above, but also include technical solutions composed of equivalent substitutions of the above technical features. Matters not covered in this utility model are common knowledge to those skilled in the art.

Claims

1. A rare earth recovery device for rare earth wastewater solutions, comprising a cooling tank (1), a top cover (3) fixedly connected to the cooling tank (1), and a sedimentation cylinder (2) fixedly connected to the top cover (3), characterized in that: The top cover (3) is fixedly connected to a feed pipe (4), and the sedimentation cylinder (2) is fixedly connected to a sedimentation discharge pipe (6) and a drain pipe (7), and also includes; Two chutes (9) are formed inside the sedimentation cylinder (2). Two sliders (10) are slidably connected inside the two chutes (9). A filter screen (11) is fixedly connected to the two sliders (10). A rotating shaft (14) is rotatably connected to the filter screen (11). A hydraulic rod (17) is fixedly connected to the top cover (3). The output shaft of the hydraulic rod (17) is rotatably connected to the rotating shaft (14).

2. The rare earth recovery device for rare earth wastewater solution according to claim 1, characterized in that: A solenoid valve 1 (5) is fixedly connected to the feed pipe (4), and a solenoid valve 2 (8) is provided on the drain pipe (7).

3. The rare earth recovery device for rare earth wastewater solution according to claim 1, characterized in that: A protective shell (12) is fixedly connected to the filter screen (11), and a motor (13) is fixedly connected inside the protective shell (12). The output shaft of the motor (13) is fixedly connected to the rotating shaft (14).

4. A rare earth recovery device for rare earth wastewater solutions according to any one of claims 1-3, characterized in that: The rotating shaft (14) is connected to two scraper blades (15), and two scraper plates (16) are fixedly connected to the two scraper blades (15).

5. The rare earth recovery device for rare earth wastewater solution according to claim 1, characterized in that: The cooling tank (1) is fixedly connected to an inlet pipe (18) and an outlet pipe (20), and the sedimentation cylinder (2) is fixedly connected to a cooling pipe (19). The two ends of the cooling pipe (19) are fixedly connected to the inlet pipe (18) and the outlet pipe (20) respectively.

6. The rare earth recovery device for rare earth wastewater solution according to claim 1, characterized in that: The cooling box (1) has multiple heat dissipation holes (21) and two fans (22) are installed inside the cooling box (1).

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