A palladium extraction device for palladium-containing wastewater

Abstract

The present invention belongs to the technical field of wastewater treatment devices, and in particular, relates to a palladium extraction device for palladium-containing wastewater, comprising a treatment tube, a coaxial filter tube is arranged at the axis of the treatment tube, multiple groups of vertical partitions are distributed in an annular manner on the outside of the filter tube, and the number of each group of partitions is two, and the partition is vertically fixedly connected to the outer wall of the filter tube. The present invention is provided with an isolation component, and in the process of driving the enclosing plate and the movable tube to move up and down by the driving screw, the area where the filter element and the enclosing plate are directly opposite can be isolated by the enclosing plate, the partition, the movable tube and the cleaning component, so that part of the impurities originally adsorbed on the inner wall of the filter tube under the action of water flow can fall to the top of the cleaning component under the action of gravity, and another part of the impurities can be easily separated from the inner wall of the filter tube under the scraping of the cleaning component, thereby improving the removal effect of impurities attached to the inner wall of the filter tube and ensuring the smoothness of the filter tube.

Description

Technical Field

[0001] The invention belongs to the technical field of wastewater treatment devices, and in particular relates to a palladium extraction device for palladium-containing wastewater. Background Art

[0002] Wastewater containing palladium mainly exists in the processes of palladium plating, nickel-palladium-gold, palladium activation and palladium tank nitrate tank cleaning in the production of circuit boards or electroplating enterprises. The concentration of palladium ions is generally 10-100PPM. Among them, nickel-palladium-gold and palladium activation processes consume a large amount of precious metal palladium every year. The main reasons for consumption are the regular replacement of palladium tanks and the cleaning process after palladium deposition of plated parts. For this type of palladium-containing wastewater, the industry currently directly discharges it into the wastewater station, resulting in the waste of palladium, a rare and precious metal.

[0003] In order to avoid the waste of palladium metal, palladium-containing wastewater is generally treated to achieve the purpose of palladium metal recovery. At present, palladium metal in palladium-containing wastewater is mainly divided into two forms: colloidal palladium and ionic palladium. The following methods are mainly used to recover these two forms of palladium:

[0004] Colloidal palladium: It is a colloid formed by nanoparticles. Sn2+ is needed to stabilize the colloid, which will lead to precipitation. The colloid consists of two parts: particles and dispersed substances. Therefore, colloidal palladium has no charge and cannot be recovered by ion exchange. Therefore, high-mesh filtration is selected for filtration, which can recover palladium through special adsorption.

[0005] Ionic palladium: It exists in the form of ions and does not contain Sn2+, so a high-efficiency filter element is selected to filter out suspended impurities in the liquid, and then the palladium is adsorbed and recovered through ion exchange materials.

[0006] In the process of using a high-efficiency filter element to absorb ionic palladium, due to the lack of a suitable cleaning device in the filter cartridge, the filter element is easily blocked by large particles of impurities during the process of the filter element adsorbing impurities, thereby affecting the adsorption effect of the filter element. Summary of the invention

[0007] In view of the above problems, the present invention provides a palladium extraction device for palladium-containing wastewater to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A palladium extraction device for palladium-containing wastewater comprises a treatment cylinder, wherein a coaxial filter tube is arranged at the axis of the treatment cylinder, multiple groups of vertical partitions are distributed in an annular manner on the outside of the filter tube, and each group of partitions has two partitions, the partition is vertically fixedly connected to the outer wall of the filter tube, there is a gap between two partitions in the same group, and the filter tube is penetrated with matching strip holes at the position opposite to the gap, the tops and bottoms of the multiple groups of partitions are fixedly connected with circular sealing plates, and the diameter of the sealing plates matches the inner diameter of the treatment cylinder, the sealing plate located at the top is penetrated with multiple connection holes, and the multiple connection holes are alternately distributed with the multiple groups of partitions, and multiple hollow plates are horizontally fixedly connected with equal intervals in the up and down directions between two adjacent groups of partitions. A filter element is provided at the top of the hollow plate and the top of the sealing plate at the bottom, a sealing cover is provided at the top of the treatment cylinder, the top of the sealing cover is connected to a drain pipe, a connecting cylinder is inserted through the center of the top of the sealing cover, one side of the connecting cylinder is connected to a water inlet pipe, the bottom end of the connecting cylinder is inserted through the sealing plate at the top, and the connecting cylinder is connected to the filter tube, a coaxial driving screw is provided at the axis of the filter tube, the top end of the driving screw rotates vertically in turn through the sealing plate inserted at the top and the top center of the connecting cylinder, and the top end of the driving screw is transmission-connected to a motor, the part of the driving screw located in the filter tube is provided with an isolation assembly, and the bottom of the treatment cylinder is connected to a collecting assembly.

[0010] Furthermore, the isolation assembly includes a movable tube, which is sleeved on the periphery of the driving screw, the top edge of the movable tube protrudes outward, and the length of the movable tube is greater than the distance between the upper and lower adjacent hollow plates, a plurality of limit plates with the same length are arranged around the movable tube, and the plurality of limit plates are slidably inserted one by one between two partitions in the same group, the side of the limit plate close to the driving screw is fixedly connected to the top edge of the movable tube, and the sides of the plurality of limit plates away from the driving screw are fixedly connected to the same enclosure, the height of the enclosure matches the height of the limit plate, the outer side and the inner side of the enclosure are respectively fitted with the inner wall of the processing cylinder and the side of the partition away from the driving screw, a shaft sleeve is arranged on the top of the movable tube, the shaft sleeve is threadedly sleeved on the driving screw, a plurality of first connecting rods are fixedly connected between the outer side of the shaft sleeve and the top of the movable tube, and a cleaning assembly is arranged on the outer side of the movable tube.

[0011] Furthermore, the cleaning assembly includes a cleaning strip arranged in a spiral, the outer side of the cleaning strip being kept in contact with the inner wall of the filter tube, the top and bottom ends of the cleaning strip being fixedly connected with a fixing ring, the fixing ring located at the top being rotatably mounted on the bottom of the outward protruding part of the top of the movable tube, the inner side of the fixing ring located at the bottom being provided with a movable ring, the movable ring being sleeved on the driving screw, two limit blocks being symmetrically fixedly connected to the inner side of the movable ring, two vertical limit grooves being provided at the positions opposite to the driving screw and the limit blocks, and the limit blocks being slidably installed in the limit grooves, a plurality of second connecting rods being fixedly connected between the outer side of the movable ring and the fixing ring located at the bottom, a sealing ring being provided on the inner side of the fixing ring located at the bottom, the sealing ring being slidably sleeved on the movable tube, and the outer diameter of the sealing ring being larger than the inner diameter of the fixing ring, and a plurality of pressure rods being vertically fixedly connected to the bottom of the sealing ring.

[0012] Furthermore, the collecting assembly includes a collecting cylinder, which is connected to the bottom of the treatment cylinder, and the top opening diameter of the collecting cylinder is smaller than the inner diameter of the treatment cylinder. A conical float is arranged in the collecting cylinder, the tip of the conical float is facing upward, and the maximum diameter of the conical float is larger than the opening diameter of the collecting cylinder. A limiting rod is vertically fixedly connected to the bottom center of the conical float, and the bottom end of the limiting rod is slidably sleeved with a limiting tube, and the limiting tube is vertically fixedly connected to the bottom inner wall of the collecting cylinder, and a drain valve is connected to one side of the collecting cylinder.

[0013] Furthermore, the outer side of the sealing ring and the inner side of the fixing ring at the bottom are both designed as conical surfaces, and the conical surfaces of the two can fit together.

[0014] Furthermore, the sum of the gravity of the sealing ring and the plurality of pressure rods is greater than the buoyancy generated by the conical floating block, and the buoyancy generated by the conical floating block is greater than the sum of the gravity of the conical floating block and the position limiting tube.

[0015] Furthermore, the plurality of pressure rods are opposite to the plurality of second connecting rods one by one, and the pressure rods are slidably sleeved on the corresponding second connecting rods.

[0016] Furthermore, the length of the pressure rod is greater than the length of the limiting tube, and the pressure rod can contact the top of the conical floating block.

[0017] Technical effects and advantages of the present invention:

[0018] 1. The present invention is provided with an isolation component. In the process of driving the screw rod to drive the enclosure and the movable tube to move up and down, the area where the filter element and the enclosure face each other can be isolated by the enclosure, the partition, the movable tube and the cleaning component, so that part of the impurities originally adsorbed on the inner wall of the filter tube under the action of water flow can fall to the top of the cleaning component under the action of gravity, and the other part of the impurities can be easily separated from the inner wall of the filter tube under the scraping of the cleaning component, thereby improving the cleaning effect of the impurities attached to the inner wall of the filter tube and ensuring the smoothness of the filter tube;

[0019] 2. The present invention is provided with a cleaning assembly. During the rotation of the driving screw, the driving screw can drive the movable ring to rotate together through the cooperation of the limit groove and the limit block. As the movable ring rotates, the movable ring can drive the cleaning bar to rotate through the second connecting rod. Therefore, while the driving screw drives the movable tube to move in the vertical direction, the cleaning bar can rotate and scrape against the inner wall of the filter tube, thereby scraping off the larger impurities filtered by the filter tube from the inner wall of the filter tube, thereby ensuring the cleanliness of the filter tube.

[0020] 3. The present invention is provided with a collecting cylinder. When the cleaning strip scrapes off the impurities on the inner wall of the filter tube, the impurities can move downward with the movable tube. When the conical floating plate is pressed by the pressure rod and separated from the opening of the collecting cylinder, the impurities located on the outside of the movable tube can enter the collecting cylinder through the opening of the collecting cylinder and be temporarily stored. Then, as the driving screw drives the movable tube to move upward and reset, the pressure rod can also be separated from the conical floating block. Then, the conical floating block can seal the top opening of the collecting cylinder under the action of buoyancy, thereby preventing the collected impurities from returning to the filter tube. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 2 It is a cross-sectional view of the overall structure of the present invention;

[0023] Figure 3 The present invention Figure 2 A magnified view of part A;

[0024] Figure 4 The present invention Figure 2 A magnified view of part B;

[0025] Figure 5 It is a three-dimensional schematic diagram of the structures of the partition plate, the sealing plate, the hollow plate and the filter element in the present invention;

[0026] Figure 6 It is a three-dimensional schematic diagram of the movable tube, the limiting plate, the enclosing plate, the shaft sleeve and the first connecting rod in the present invention;

[0027] Figure 7 It is a three-dimensional schematic diagram of the filter tube, the partition plate, the sealing plate and the hollow plate in the present invention;

[0028] Figure 8 It is a three-dimensional schematic diagram of the cleaning strip, the fixed ring, the movable ring, the second connecting rod and the pressure rod in the present invention;

[0029] Fig. 9 It is a three-dimensional schematic diagram of the cleaning strip, the fixed ring, the movable ring, the limit block, and the second connecting rod in the present invention;

[0030] Fig.10 is a three-dimensional cross-sectional view of the collecting tube in the present invention;

[0031] Fig.11 It is a three-dimensional schematic diagram of the driving screw in the present invention.

[0032] In the figure: 1. treatment cylinder; 2. filter tube; 3. partition; 4. sealing plate; 5. connecting hole; 6. hollow plate; 7. filter element; 8. sealing cover; 9. drain pipe; 10. connecting cylinder; 11. water inlet pipe; 12. driving screw; 13. motor; 14. movable tube; 15. limit plate; 16. enclosure; 17. bushing; 18. first connecting rod; 19. cleaning strip; 20. fixing ring; 21. movable ring; 22. limit block; 23. limit groove; 24. second connecting rod; 25. sealing ring; 26. pressure rod; 27. collecting cylinder; 28. conical float; 29. ​​limit rod; 30. limit pipe; 31. drain valve. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0034] The present invention provides Figures 1 to 11A palladium extraction device for palladium-containing wastewater shown in the figure comprises a treatment cylinder 1, a coaxial filter tube 2 is arranged at the axis center of the treatment cylinder 1, a plurality of groups of vertical partitions 3 are distributed in an annular manner on the outside of the filter tube 2, and the number of partitions 3 in each group is two, the partition 3 is vertically fixedly connected to the outer wall of the filter tube 2, there is a gap between the two partitions 3 in the same group, and the filter tube 2 is penetrated with matching strip holes at the position opposite to the gap, the tops and bottoms of the plurality of groups of partitions 3 are fixedly connected with circular sealing plates 4, and the diameter of the sealing plates 4 matches the inner diameter of the treatment cylinder 1, a plurality of connecting holes 5 are penetrated on the sealing plate 4 located at the top, and the plurality of connecting holes 5 are alternately distributed with the plurality of groups of partitions 3, a plurality of hollow plates 6 are horizontally fixedly connected with equal intervals in the up and down directions between two adjacent groups of partitions 3, and the top of the hollow plates 6 A filter element 7 is provided at the top of the treatment cylinder 1 and the top of the sealing plate 4 located at the bottom. A sealing cover 8 is provided at the top of the treatment cylinder 1. A drain pipe 9 is connected to the top of the sealing cover 8. A connecting cylinder 10 is inserted through the center of the top of the sealing cover 8. A water inlet pipe 11 is connected to one side of the connecting cylinder 10. The bottom end of the connecting cylinder 10 is inserted through the sealing plate 4 located at the top, and the connecting cylinder 10 is connected to the filter tube 2. A coaxial driving screw 12 is provided at the axis of the filter tube 2. The top end of the driving screw 12 rotates vertically in turn and penetrates the sealing plate 4 and the top center of the connecting cylinder 10. The top end of the driving screw 12 is connected to a motor 13. The part of the driving screw 12 located in the filter tube 2 is provided with an isolation component. The bottom of the treatment cylinder 1 is connected with a collecting component.

[0035] The isolation assembly includes a movable tube 14, which is sleeved on the periphery of the driving screw 12, the top edge of the movable tube 14 protrudes outward, and the length of the movable tube 14 is greater than the distance between the upper and lower adjacent hollow plates 6, and a plurality of limit plates 15 with the same length are arranged around the movable tube 14, and the plurality of limit plates 15 are slidably inserted between the two partitions 3 in the same group in a one-to-one correspondence, and the side of the limit plate 15 close to the driving screw 12 is fixedly connected to the top edge of the movable tube 14, and the plurality of limit plates A side of the movable tube 14 away from the driving screw 12 is fixedly connected with a same enclosing plate 16, the height of the enclosing plate 16 matches the height of the limiting plate 15, the outer side and the inner side of the enclosing plate 16 are respectively fitted with the inner wall of the processing cylinder 1 and the side of the partition 3 away from the driving screw 12, a sleeve 17 is provided on the top of the movable tube 14, the sleeve 17 is threadedly sleeved on the driving screw 12, a plurality of first connecting rods 18 are fixedly connected between the outer side of the sleeve 17 and the top of the movable tube 14, and a cleaning assembly is provided on the outer side of the movable tube 14;

[0036] When filtering palladium-containing sewage, the palladium-containing sewage is passed into the connecting tube 10 through the water inlet pipe 11, and then the palladium-containing sewage can enter the filter tube 2 through the connecting tube 10, and then the filter tube 2 can intercept larger impurities in the palladium-containing sewage, and then the sewage filtered by the filter tube 2 can enter the filter element 7, and then the sewage filtered by the filter element 7 can enter the top area of ​​the sealing plate 4 through the connecting hole 5 on the top sealing plate 4, and finally the filtered sewage can be discharged from the treatment tube 1 through the drain pipe 9;

[0037] During the process of the filter element 7 adsorbing the palladium-containing wastewater, after a period of filtration, a large number of large particles of impurities will be attached to the inner wall of the filter tube 2. At this time, the motor 13 can be started to drive the driving screw 12 to rotate. As the driving screw 12 rotates, the driving screw 12 can drive the first connecting rod 18 and the movable tube 14 to move up and down in the vertical direction through the shaft sleeve 17. During the movement of the movable tube 14, the enclosure 16 can move downward together driven by the limit plate 15 and block the side of the filter element 7 away from the driving screw 12, and the area directly facing the filter element 7 and the enclosure 16 can be blocked by the enclosure 16, the partition 3, the movable tube 14 and The cleaning component is isolated, so the sewage no longer flows into the area of ​​the filter element 7. At the same time, since the sewage no longer flows into the area of ​​the filter element 7, the water flow will not generate an impact force on the inner wall of the filter tube 2 in the area. At this time, part of the impurities originally adsorbed on the inner wall of the filter tube 2 under the action of the water flow can fall to the top of the cleaning component under the action of gravity, while the other part of the impurities can be easily separated from the inner wall of the filter tube 2 under the scraping of the cleaning component, thereby improving the cleaning effect of the impurities attached to the inner wall of the filter tube 2 and ensuring the smoothness of the filter tube 2. Subsequently, the separated impurities can move downward with the movable tube 14 and finally enter the collection component;

[0038] In addition, as the movable tube 14 and the enclosure 16 move up and down, the shielding effect of the enclosure 16 and the movable tube 14 on the filter element 7 in the area directly opposite to them can increase the flow rate of sewage entering other areas, and thus can also ensure to a certain extent that the filter elements 7 in different depth areas can be in relatively uniform contact with the sewage, thereby reducing the filtration differences caused by the different depths of sewage in which the filter elements 7 are located.

[0039] like Figures 2 to 9As shown, the cleaning assembly includes a cleaning strip 19 spirally arranged, the outer side of the cleaning strip 19 is kept in contact with the inner wall of the filter tube 2, the top and bottom ends of the cleaning strip 19 are fixedly connected with a fixing ring 20, the fixing ring 20 located at the top is rotatably installed at the bottom of the outward protruding part of the top of the movable tube 14, and the inner side of the fixing ring 20 located at the bottom is provided with a movable ring 21, the movable ring 21 is sleeved on the driving screw 12, and two limit blocks 22 are symmetrically fixedly connected to the inner side of the movable ring 21, and two vertical limit grooves 23 are provided at the position opposite to the drive screw 12 and the limit block 22, and the limit block 22 is slidably installed in the limit groove 2 3, a plurality of second connecting rods 24 are fixedly connected between the outer side of the movable ring 21 and the fixed ring 20 at the bottom, a sealing ring 25 is provided on the inner side of the fixed ring 20 at the bottom, the sealing ring 25 is slidably sleeved on the movable tube 14, and the outer diameter of the sealing ring 25 is larger than the inner diameter of the fixed ring 20, a plurality of pressure rods 26 are vertically fixedly connected to the bottom of the sealing ring 25, the outer side of the sealing ring 25 and the inner side of the fixed ring 20 at the bottom are both conical surface designs, and the conical surfaces of the two can be fitted together, the plurality of pressure rods 26 are opposite to the plurality of second connecting rods 24 one by one, and the pressure rods 26 are slidably sleeved on the corresponding second connecting rods 24;

[0040] By providing a cleaning assembly, during the rotation of the driving screw 12, the driving screw 12 can drive the movable ring 21 to rotate together through the cooperation of the limit groove 23 and the limit block 22, and as the movable ring 21 rotates, the movable ring 21 can drive the cleaning bar 19 to rotate through the second connecting rod 24, so that when the driving screw 12 drives the movable tube 14 to move in the vertical direction, the cleaning bar 19 can rotate and scrape along the inner wall of the filter tube 2, so as to scrape off the larger impurities filtered by the filter tube 2 from the inner wall of the filter tube 2, thereby ensuring the cleanliness of the filter tube 2, and then the scraped impurities are removed. The impurities below can fall on the sealing ring 25 and the top of the fixed ring 20 at the bottom, and gradually approach the collecting assembly as the movable tube 14 moves downward. When the pressure rod 26 at the bottom of the sealing ring 25 contacts the collecting assembly, the collecting assembly can be opened. After the collecting assembly is fully opened, as the movable tube 14 continues to move downward, the sealing ring 25 can gradually move upward and separate from the fixing ring 20 under the pushing of the pressure rod 26 by the collecting assembly. Subsequently, the impurities falling on the sealing ring 25 and the fixing ring 20 can fall into the collecting assembly through the gap between the sealing ring 25 and the fixing ring 20 and be collected.

[0041] like Figure 1 and Fig.10As shown, the collecting assembly includes a collecting barrel 27, which is connected to the bottom of the treatment barrel 1, and the top opening diameter of the collecting barrel 27 is smaller than the inner diameter of the treatment barrel 1, and a conical floating block 28 is arranged in the collecting barrel 27, the tip of the conical floating block 28 faces upward, and the maximum diameter of the conical floating block 28 is larger than the opening diameter of the collecting barrel 27, a limiting rod 29 is vertically fixedly connected to the bottom center of the conical floating block 28, and the bottom end of the limiting rod 29 is slidably sleeved with a limiting tube 30, and the limiting tube 30 is vertically fixedly connected to the bottom inner wall of the collecting barrel 27, and a sewage valve 31 is connected to one side of the collecting barrel 27, the sum of the gravity of the sealing ring 25 and the plurality of pressure rods 26 is greater than the buoyancy generated by the conical floating block 28, the buoyancy generated by the conical floating block 28 is greater than the sum of its own gravity and the limiting tube 30, the length of the pressure rod 26 is greater than the length of the limiting tube 30, and the pressure rod 26 can contact the top of the conical floating block 28;

[0042] By providing the collecting barrel 27, in the process of the treatment barrel 1 treating the palladium-containing wastewater, as the electric drive screw 12 rotates, the movable tube 14 can drive the fixing ring 20 and the cleaning strip 19 to move downward, and as the fixing ring 20 moves downward, the sealing ring 25 and the pressure rod 26 can gradually approach the conical floating block 28 under the action of gravity, and when the pressure rod 26 contacts the conical floating block 28, the conical floating block 28 can move downward under the pressure of the pressure rod 26, and as the conical floating block 28 moves downward, the conical floating block 28 can gradually separate from the top opening of the collecting barrel 27, so that the top opening of the collecting barrel 27 is gradually opened, and as the conical floating block 28 continues to move downward, when the limiting rod 29 is fully inserted into the limiting tube 30, as the movable tube 14 continues to move downward, the sealing ring 25 can be gradually opened under the pushing of the conical floating block 28 on the pressure rod 26 The movable tube 14 is gradually separated from the fixing ring 20. At this time, the impurities scraped off by the cleaning strip 19 on the outside of the movable tube 14 can fall onto the top inclined surface of the conical floating block 28 through the gap between the sealing ring 25 and the fixing ring 20. As the cleaning strip 19 continues to rotate, the cleaning strip 19 can push the impurities scraped off from the inner wall of the filter tube 2 downward, and finally fall into the collecting barrel 27 along the top of the conical floating block 28 for temporary storage. When the movable tube 14 moves to the bottom, the motor 13 can be temporarily stopped, so that the impurities on the outside of the movable tube 14 can be fully precipitated and enter the collecting barrel 27. Then, as the driving screw 12 drives the movable tube 14 to move upward and reset, the pressure rod 26 can also be separated from the conical floating block 28. Then, the conical floating block 28 can seal the top opening of the collecting barrel 27 under the action of buoyancy, thereby preventing the collected impurities from returning to the filter tube 2.

[0043] After a period of impurity accumulation, the injection of palladium-containing wastewater into the treatment cylinder 1 can be stopped, and then the drain valve 31 is opened to discharge the impurities collected in the collection cylinder 27 in a centralized manner.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A palladium extraction device for palladium-containing wastewater, comprising a treatment cylinder (1), characterized in that: A coaxial filter tube (2) is arranged at the axis of the treatment tube (1), and a plurality of groups of vertical partitions (3) are distributed in an annular manner on the outer side of the filter tube (2), and the number of partitions (3) in each group is two. The partitions (3) are vertically fixedly connected to the outer wall of the filter tube (2), and a gap exists between two partitions (3) in the same group, and a matching strip hole is penetrated through the filter tube (2) at a position directly opposite to the gap. The tops and bottoms of the plurality of groups of partitions (3) are fixedly connected with circular sealing plates (4), and the diameter of the sealing plates (4) matches the inner diameter of the treatment tube (1). The sealing plate (4) located at the top is penetrated with a plurality of connection holes (5), and the plurality of connection holes (5) are alternately distributed with the plurality of groups of partitions (3). A plurality of hollow plates (6) are horizontally fixedly connected at equal intervals in the up-down direction between two adjacent groups of partitions (3), and the top of the hollow plate (6) and the top of the sealing plate (4) located at the bottom are The top of the treatment cylinder (1) is provided with a sealing cover (8), the top of the sealing cover (8) is connected to a drain pipe (9), a connecting cylinder (10) is inserted through the center of the top of the sealing cover (8), one side of the connecting cylinder (10) is connected to a water inlet pipe (11), the bottom end of the connecting cylinder (10) is inserted through the sealing plate (4) located at the top, and the connecting cylinder (10) is connected to the filter tube (2), a coaxial driving screw (12) is provided at the axis of the filter tube (2), the top end of the driving screw (12) is vertically rotated and inserted through the sealing plate (4) at the top and the top center of the connecting cylinder (10) in turn, and the top end of the driving screw (12) is connected to a motor (13) in a transmission manner, the part of the driving screw (12) located in the filter tube (2) is provided with an isolation component, and the bottom of the treatment cylinder (1) is connected to a collecting component; The isolation assembly comprises a movable tube (14), the movable tube (14) being sleeved on the periphery of the driving screw (12), the top edge of the movable tube (14) protruding outward, and the length of the movable tube (14) being greater than the distance between two upper and lower adjacent hollow plates (6), a plurality of limiting plates (15) having the same length as the movable tube (14) being arranged around the movable tube (14), and the plurality of limiting plates (15) being slidably inserted between two partitions (3) in the same group in a one-to-one correspondence, the side of the limiting plate (15) close to the driving screw (12) being fixedly connected to the top edge of the movable tube (14), and the plurality of limiting plates (15) A same enclosure (16) is fixedly connected to the side away from the driving screw (12), the height of the enclosure (16) matches the height of the limit plate (15), the outer side and the inner side of the enclosure (16) are respectively in contact with the inner wall of the processing tube (1) and the side of the partition (3) away from the driving screw (12), a shaft sleeve (17) is provided at the top of the movable tube (14), the shaft sleeve (17) is threadedly sleeved on the driving screw (12), a plurality of first connecting rods (18) are fixedly connected between the outer side of the shaft sleeve (17) and the top of the movable tube (14), and a cleaning assembly is provided on the outer side of the movable tube (14).

2. The palladium extraction device for palladium-containing wastewater according to claim 1, characterized in that: The cleaning assembly comprises a cleaning strip (19) which is spirally arranged, the outer side of the cleaning strip (19) being in contact with the inner wall of the filter tube (2), the top and bottom ends of the cleaning strip (19) being fixedly connected with fixing rings (20), the fixing ring (20) located at the top being rotatably mounted on the bottom of the outwardly protruding portion of the top end of the movable tube (14), the inner side of the fixing ring (20) located at the bottom being provided with a movable ring (21), the movable ring (21) being sleeved on the driving screw (12), the inner side of the movable ring (21) being symmetrically fixedly connected with two limit blocks (22), the driving screw ( 12) Two vertical limit grooves (23) are provided at positions directly opposite to the limit block (22), and the limit block (22) is slidably installed in the limit grooves (23), a plurality of second connecting rods (24) are fixedly connected between the outer side of the movable ring (21) and the fixed ring (20) located at the bottom, a sealing ring (25) is provided on the inner side of the fixed ring (20) located at the bottom, the sealing ring (25) is slidably sleeved on the movable tube (14), and the outer diameter of the sealing ring (25) is larger than the inner diameter of the fixed ring (20), and a plurality of pressure rods (26) are vertically fixedly connected to the bottom of the sealing ring (25).

3. The palladium extraction device for palladium-containing wastewater according to claim 2, characterized in that: The collecting assembly comprises a collecting cylinder (27), the collecting cylinder (27) being connected to the bottom of the treatment cylinder (1), and the top opening diameter of the collecting cylinder (27) being smaller than the inner diameter of the treatment cylinder (1), a conical floating block (28) being arranged in the collecting cylinder (27), the tip of the conical floating block (28) being upward, and the maximum diameter of the conical floating block (28) being larger than the opening diameter of the collecting cylinder (27), a limiting rod (29) being vertically fixedly connected at the center of the bottom circle of the conical floating block (28), a limiting tube (30) being slidably sleeved at the bottom end of the limiting rod (29), the limiting tube (30) being vertically fixedly connected to the bottom inner wall of the collecting cylinder (27), and a sewage discharge valve (31) being connected to one side of the collecting cylinder (27).

4. The palladium extraction device for palladium-containing wastewater according to claim 3, characterized in that: The outer side of the sealing ring (25) and the inner side of the fixing ring (20) located at the bottom are both designed as conical surfaces, and the conical surfaces of the two can fit together.

5. The palladium extraction device for palladium-containing wastewater according to claim 4, characterized in that: The sum of the weights of the sealing ring (25) and the plurality of pressure rods (26) is greater than the buoyancy generated by the conical floating block (28), and the buoyancy generated by the conical floating block (28) is greater than the sum of the weights of the conical floating block and the position limiting tube (30).

6. The palladium extraction device for palladium-containing wastewater according to claim 5, characterized in that: The plurality of pressure rods (26) are opposite to the plurality of second connecting rods (24) one by one, and the pressure rods (26) are slidably sleeved on the corresponding second connecting rods (24).

7. The palladium extraction device for palladium-containing wastewater according to claim 6, characterized in that: The length of the pressure rod (26) is greater than the length of the limiting tube (30), and the pressure rod (26) can contact the top of the conical floating block (28).

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