A device for removing thallium from lead-zinc smelting wastewater

Abstract

This invention discloses a thallium removal device for lead-zinc smelting wastewater, relating to the field of wastewater treatment technology. It includes a treatment tank body and a tank cover installed on top of the tank body. A material barrier is provided between the bottom of the treatment tank body and the top of the bottom plate, and a centrifugal discharge device is provided on the top of the filter disc. When the servo motor drives the stirring rod to rotate clockwise, the ratchet, under the action of the pawl, drives the first annular chamber to rotate. This causes the first piston rod to pull the top of the rotating connecting plate, causing the inner connecting ring to move upwards. Consequently, the outer connecting ring moves upwards synchronously with the inner connecting ring. This allows the traction frame to drive the first annular baffle to move upwards. During this process, the first annular baffle, through the transition connecting ring, drives the annular filter plate upwards. At this time, the particulate sediment on the top of the filter disc falls to the inner side of the slag discharge chamber under the action of centrifugal force, improving the wastewater treatment efficiency.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically a thallium removal device for lead-zinc smelting wastewater. Background Technology

[0002] The industries involving thallium are mainly concentrated in lead and zinc smelting, iron and steel smelting, chemical production, and pigment manufacturing. Among them, lead and zinc smelting has the highest thallium content and detection frequency in wastewater discharge. Currently, the main treatment processes for thallium pollution in industrial wastewater include sodium sulfide precipitation, oxidative precipitation adsorption, electrochemical precipitation, and biological agent precipitation.

[0003] When treating thallium-containing wastewater, the wastewater must first be adjusted to a weakly alkaline state, then a heavy metal scavenging agent is added, and finally a thallium removal agent is added. With the addition of the thallium removal agent, precipitation will occur in the wastewater. After the aqueous solution of the wastewater is discharged, the particulate precipitates generated during the treatment process will remain in the treatment tank. At this time, some aqueous solution will remain on the surface of the particulate precipitates. If the particulate precipitates are discharged directly, the particulate solution remaining on the surface of the particulate precipitates will not be able to enter the subsequent treatment process, thus indirectly causing wastewater loss. At the same time, the discharge of particulate precipitates also takes a lot of time, which will affect the overall wastewater treatment efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a thallium removal device for lead-zinc smelting wastewater in order to solve the problem of inconvenient removal of solution from the surface of particulate precipitates.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a thallium removal device for lead-zinc smelting wastewater, comprising a treatment tank body and a tank cover installed on the top of the treatment tank body. A servo motor is installed on the top of the tank cover, and the output end of the servo motor is connected to a stirring rod extending to the inner side of the treatment tank body. Wastewater inlet pipes and reagent addition pipes located on both sides of the servo motor are provided on the top of the tank cover. A slag discharge bin is provided at the bottom edge of the treatment tank body, and a collection bin is provided at the bottom of the slag discharge bin. A bottom plate with the same diameter as the inner wall of the treatment tank body is installed on the inner wall of the slag discharge bin. A valve is provided at the bottom of the bottom plate, and a drain outlet extending to the outside of the slag discharge bin and located above the collection bin is provided at one end of the valve. A material barrier is provided between the bottom of the treatment tank body and the top of the bottom plate. A filter disc is rotatably connected to the top of the bottom plate, and a centrifugal draining device is provided on the top of the filter disc. A docking unit connected to the filter disc is provided at the bottom of the stirring rod.

[0006] As a further embodiment of the present invention: the material barrier includes a first annular chamber rotatably connected to the end of the stirring rod near the servo motor. A ratchet is fixedly connected to the stirring rod and located inside the first annular chamber. A pawl that meshes with the ratchet is rotatably connected to the inner wall of the first annular chamber via a rotating shaft. A torsion spring is engaged with the rotating shaft where the pawl connects to the first annular chamber via a slot. A first piston cylinder is installed on the outer wall of the first annular chamber. A first piston rod extending to the outer side of the first piston cylinder is inserted inside the first piston cylinder. A third telescopic spring connected to the first piston rod is provided inside the first piston cylinder. A rotating connecting plate is rotatably connected to the end of the first piston rod away from the first piston cylinder via a rotating shaft. An inner connecting ring is rotatably connected to the bottom of the rotating connecting plate via a rotating shaft. An outer connecting ring is rotatably connected to the outer wall of the inner connecting ring via a bearing. A traction frame is fixedly connected to the outer wall of the outer connecting ring. A first annular baffle is provided at the bottom end of the traction frame between the stirring rod and the bottom plate. A transition connecting ring located above the filter disc is rotatably connected to the inner wall of the first annular baffle. An annular filter plate is connected to the inner wall of the transition connecting ring.

[0007] As a further embodiment of the present invention: the material blocking component further includes a telescopic rod fixed to the top of the filter disc, the top of the telescopic rod is provided with a positioning rod connected to the top of the annular filter plate, the bottom of the telescopic rod is provided with an L-shaped positioning plate, and the top of the L-shaped positioning plate is provided with an annular scraper.

[0008] As a further embodiment of the present invention: the outer wall of the annular scraper is in contact with the top of the inner wall of the annular filter plate. The telescopic rod is extended by the upward movement of the annular filter plate. At this time, the annular filter plate will come into contact with the annular scraper during the upward movement, so that the particulate sediment on the inner wall of the annular filter plate is scraped by the annular scraper and falls to the top of the filter disc.

[0009] As a further embodiment of the present invention: the centrifugal draining component includes a second annular chamber installed on the top of the filter disc, a second piston cylinder installed on the outer wall of the second annular chamber, a second piston rod inserted into the interior of the second piston cylinder extending to the outside of the second piston cylinder, a second telescopic spring connected to the second piston rod on the inner wall of the second piston cylinder, an inclined guide rail provided at the top of the second piston rod, a locking pin slidably connected to the inner side of the inclined guide rail, lifting frames connected to both ends of the locking pin, a connecting frame connected to one side of the lifting frame, and a second annular baffle located between the annular filter plate and the first annular baffle at the end of the connecting frame away from the lifting frame, the second annular baffle being located above the transition ring.

[0010] As a further embodiment of the present invention: the center of the second annular chamber is coaxial with the center of the filter disc, and the center of the stirring rod is coaxial with the center of the filter disc.

[0011] As a further embodiment of the present invention: the inner wall of the second annular baffle has the same diameter as the outer wall of the annular filter plate, and the outer wall of the second annular baffle has the same diameter as the inner wall of the first annular baffle.

[0012] As a further embodiment of the present invention: the docking unit includes a U-shaped slide rod slidably connected to the stirring rod, with floats at both ends of the U-shaped slide rod, and a hexagonal insert extending to the inner side of the second annular chamber inserted into the bottom end of the stirring rod. A hexagonal insertion hole that fits into the hexagonal insert is opened at the center of the filter disc, and a limiting disc is provided at the top of the hexagonal insert. A first telescopic spring connected to the stirring rod and located outside the hexagonal insert is provided at the bottom of the limiting disc.

[0013] As a further embodiment of the present invention: the inner side of the stirring rod is provided with a groove that matches the U-shaped slide rod and the limiting disc.

[0014] As a further aspect of the present invention: the top of the second annular chamber and the bottom of the stirring rod are both provided with through holes that fit the hexagonal insert. When the bottom of the hexagonal insert is not aligned with the through hole at the top of the second annular chamber, the hexagonal insert will rotate to the position aligned with the through hole at the top of the second annular chamber under the action of the stirring rod. As the U-shaped slide bar continuously presses the limiting disc, the hexagonal insert will pass through the through hole at the top of the second annular chamber and be inserted into the inside of the hexagonal insert.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. By setting up material blocking components, when the servo motor drives the stirring rod to rotate clockwise, the ratchet will drive the first annular chamber to rotate under the action of the pawl. This causes the first piston rod to pull the top of the rotating connecting plate, causing the inner ring to move upward. As a result, the outer ring moves upward synchronously with the inner ring. This allows the traction frame to drive the first annular baffle to move upward. During this process, the first annular baffle drives the annular filter plate to move upward through the transition ring. At this time, the particulate sediment on the top of the filter disc will fall to the inside of the slag discharge bin under the action of centrifugal force, so that the particulate sediment enters the collection bin. This allows for rapid treatment of the sediment inside the treatment tank. This not only improves the wastewater treatment efficiency, but also eliminates the need for workers to clean the particulate sediment separately, reducing the labor intensity of the workers.

[0017] 2. By setting up a centrifugal discharge component, when the filter disc rotates counterclockwise with the stirring rod, the second annular baffle will move away from the second piston cylinder under the action of centrifugal force. This causes the inclined guide rail to squeeze the locking pin, causing the locking pin to move upward. When the locking pin moves upward, it will drive the second annular baffle to move upward through the lifting frame and connecting frame. This removes the obstruction on the outer wall of the annular filter plate. At this time, the particulate sediment at the top of the filter disc will adhere to the inner wall of the annular filter plate under the action of centrifugal force. As the filter disc rotates, the aqueous solution attached to the surface of the particulate sediment can pass through the annular filter plate and fall to the inner wall of the first annular baffle. At this time, the aqueous solution on the inner wall of the first annular baffle will pass through the transition ring under its own gravity and enter the drain outlet. In this way, part of the aqueous solution attached to the surface of the particulate sediment can be removed, thereby preventing a large amount of wastewater from being discharged with the particulate sediment. This reduces the water content of the sediment and reduces the amount of pollutants carried over.

[0018] 3. By setting up a docking unit, when wastewater is injected into the main body of the treatment tank, the float will float on the water surface. As the amount of wastewater injected increases, the float gets closer to the tank cover. At this time, the top of the limiting disc will lose the pressure of the U-shaped sliding rod. This allows the hexagonal insert to retract into the bottom of the stirring rod under the elastic restoring force of the first telescopic spring. At this time, the stirring rod and the second annular chamber will lose connection. When the stirring rod rotates, it cannot drive the filter disc to rotate. As the wastewater is discharged from the main body of the treatment tank, the float will move down with the decrease in wastewater volume. This allows the U-shaped sliding rod to press the limiting disc, causing the limiting disc to push the hexagonal insert down. This allows the hexagonal insert to pass through the top of the second annular chamber and insert into the inside of the hexagonal insertion hole, thereby realizing the connection between the filter disc and the stirring rod. This prevents the second annular baffle from losing its shielding of the annular filter plate when a large amount of aqueous solution inside the main body of the treatment tank has not been discharged. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of the processing tank body of the present invention;

[0021] Figure 3 This is a schematic diagram showing the connection between the stirring rod and the first annular baffle of the present invention;

[0022] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0023] Figure 5 This is a partial cross-sectional view of the filter disk of the present invention;

[0024] Figure 6 For the present invention Figure 5 Enlarged view at point B in the middle;

[0025] Figure 7 For the present invention Figure 5 Enlarged view at point C;

[0026] Figure 8 This is a schematic diagram showing the connection between the second piston cylinder and the second annular baffle of the present invention;

[0027] Figure 9 This is a schematic diagram of the top structure of the filter disc of the present invention;

[0028] Figure 10 This is a schematic diagram of the internal structure of the first annular compartment of the present invention.

[0029] In the diagram: 1. Processing tank body; 2. Tank cover; 3. Servo motor; 4. Wastewater inlet pipe; 5. Chemical dosing pipe; 6. Slag discharge bin; 7. Collection bin; 8. Drain outlet; 9. Bottom plate; 10. Valve; 11. Agitator rod; 12. First annular bin; 13. First piston cylinder; 14. First piston rod; 15. Rotary connecting plate; 16. Traction frame; 17. Outer connecting ring; 18. Inner connecting ring; 19. First annular baffle; 20. Second piston cylinder; 21. Second annular bin; 22. Filter disc; 23. U 24. Sliding rod; 25. Float; 26. Second annular baffle; 27. Annular filter plate; 28. Connecting frame; 29. ​​Positioning rod; 30. Annular scraper; 31. Telescopic rod; 32. L-shaped positioning plate; 33. Lifting frame; 34. Transition interlock; 35. Locking pin; 36. Second piston rod; 37. Slanted guide rail; 38. Limiting disc; 39. First telescopic spring; 40. Hexagonal insert rod; 41. Hexagonal socket; 42. Second telescopic spring; 43. Ratchet; 44. Pawl; 45. Third telescopic spring. Detailed Implementation

[0030] 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.

[0031] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0032] Please see Figures 1-10 In this embodiment of the invention, a thallium removal device for lead-zinc smelting wastewater includes a treatment tank body 1 and a tank cover 2 installed on the top of the treatment tank body 1. A servo motor 3 is installed on the top of the tank cover 2, and the output end of the servo motor 3 is connected to a stirring rod 11 extending into the inside of the treatment tank body 1. Wastewater inlet pipes 4 and reagent addition pipes 5 are provided on the top of the tank cover 2 on both sides of the servo motor 3. A slag discharge bin 6 is provided at the bottom edge of the treatment tank body 1, and a collection bin 7 is provided at the bottom of the slag discharge bin 6. The inner wall of the silo 6 is fitted with a bottom plate 9 with the same diameter as the inner wall of the main body of the treatment tank 1. A valve 10 is provided at the bottom of the bottom plate 9. One end of the valve 10 is provided with a drain outlet 8 that extends to the outside of the slag discharge silo 6 and is located above the collection silo 7. A material barrier is provided between the bottom of the main body of the treatment tank 1 and the top of the bottom plate 9. A filter disc 22 is rotatably connected to the top of the bottom plate 9. A centrifugal draining device is provided at the top of the filter disc 22. A docking unit connected to the filter disc 22 is provided at the bottom of the stirring rod 11.

[0033] In this embodiment, wastewater enters the treatment tank body 1 through the wastewater inlet pipe 4. At this time, the gap between the bottom plate 9 and the stirring rod 11 is blocked by the material barrier, and the bottom of the filter disc 22 is also blocked by the bottom plate 9, thus keeping the wastewater inside the treatment tank body 1. As the wastewater is injected, the stirring rod 11 and the filter disc 22 lose connection under the action of the docking unit. Then, a pH adjuster is added to the treatment tank body 1, and then the servo motor 3 is started. The servo motor 3 drives the stirring rod 11 to rotate counterclockwise to agitate the wastewater in the treatment tank body 1. Then, a thallium removal agent is added to the treatment tank body 1. As the stirring rod 11 agitates the wastewater, the thallium removal agent reacts fully with the wastewater. At this time, particulate precipitates will appear in the wastewater. Then, the valve 10 is opened, and the wastewater is discharged to the next treatment process through the drain outlet 8. At this time, the particulate precipitates will remain on the filter disc 22. At the top, as the wastewater in the main body 1 of the treatment tank decreases, the stirring rod 11 and the filter disc 22 are connected by the docking unit. At this time, the filter disc 22 will rotate synchronously with the stirring rod 11, which will enable the centrifugal discharge device to operate. The centrifugal force of the rotating filter disc 22 will separate the particulate matter remaining on the surface of the particulate matter from the particulate matter, so that the particulate matter on the surface of the particulate matter can be discharged through the drain port 8. Then, the servo motor 3 will make the stirring rod 11 rotate clockwise, which will enable the material blocking device to operate, so that the bottom plate 9 and the stirring rod 11 will no longer be blocked. At this time, the particulate matter remaining on the top of the filter disc 22 will be discharged into the slag discharge chamber 6 under the action of centrifugal force. In this way, the slag can be discharged without the need for the staff to clean the slag separately. The operation is simple and the wastewater treatment efficiency is improved.

[0034] Please refer to this carefully. Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 10The material barrier includes a first annular chamber 12 rotatably connected to the end of the stirring rod 11 near the servo motor 3. A ratchet 42 is fixedly connected to the stirring rod 11 and located inside the first annular chamber 12. A pawl 43 that meshes with the ratchet 42 is rotatably connected to the inner wall of the first annular chamber 12 via a rotating shaft. A torsion spring is engaged with the rotating shaft where the pawl 43 connects to the first annular chamber 12 via a slot. A first piston cylinder 13 is installed on the outer wall of the first annular chamber 12. A first piston rod 14 extending to the outer side of the first piston cylinder 13 is inserted into the inside of the first piston cylinder 13. A first piston rod 14 is provided inside the first piston cylinder 13. The third telescopic spring 44 is connected to the rod 14. The end of the first piston rod 14 away from the first piston cylinder 13 is rotatably connected to the rotating plate 15 via a rotating shaft. The bottom of the rotating plate 15 is rotatably connected to the inner ring 18 via a rotating shaft. The outer wall of the inner ring 18 is rotatably connected to the outer ring 17 via a bearing. The outer wall of the outer ring 17 is fixedly connected to the traction frame 16. The bottom end of the traction frame 16 is provided with a first annular baffle 19 located between the stirring rod 11 and the bottom plate 9. The inner wall of the first annular baffle 19 is rotatably connected to the transition ring 33 located above the filter disc 22. The inner wall of the transition ring 33 is connected to the annular filter plate 26.

[0035] The material barrier also includes a telescopic rod 30 fixed to the top of the filter disc 22. The top of the telescopic rod 30 is provided with a positioning rod 28 connected to the top of the annular filter plate 26. The bottom of the telescopic rod 30 is provided with an L-shaped positioning plate 31. The top of the L-shaped positioning plate 31 is provided with an annular scraper 29.

[0036] The outer wall of the annular scraper 29 is in contact with the top of the inner wall of the annular filter plate 26. The extension rod 30 is extended by the upward movement of the annular filter plate 26. During the upward movement, the annular filter plate 26 will come into contact with the annular scraper 29, causing the particulate sediment on the inner wall of the annular filter plate 26 to fall to the top of the filter disc 22 by the scraping of the annular scraper 29.

[0037] In this embodiment, when the servo motor 3 drives the stirring rod 11 to rotate counterclockwise, the pawl 43 cannot limit the ratchet 42. At this time, the ratchet 42 rotates relative to the first annular chamber 12, and the first annular baffle 19 blocks the gap between the stirring rod 11 and the bottom plate 9. When the servo motor 3 drives the stirring rod 11 to rotate clockwise, the ratchet 42 will drive the first annular chamber 12 to rotate under the action of the pawl 43, so that the first piston rod 14 moves away from the first piston cylinder 13 under the action of centrifugal force. At this time, the first piston rod 14 will pull the top of the rotating connecting plate 15 to move the inner connecting ring 18 upward, thereby making the outer connecting ring 18 move upward. Ring 17 moves upward synchronously with inner ring 18, which allows traction frame 16 to drive first annular baffle 19 upward. During this process, first annular baffle 19 drives annular filter plate 26 upward through transition ring 33, thus separating annular filter plate 26 from filter disc 22. At this time, the particulate sediment at the top of filter disc 22 will fall to the inside of slag discharge bin 6 under the action of centrifugal force, so that the particulate sediment enters collection bin 7, thereby quickly treating the sediment inside treatment tank body 1. This not only improves the wastewater treatment efficiency, but also eliminates the need for staff to clean particulate sediment separately, reducing the labor intensity of staff.

[0038] Please refer to this carefully. Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 The centrifugal discharge component includes a second annular chamber 21 installed on the top of the filter disc 22. A second piston cylinder 20 is installed on the outer wall of the second annular chamber 21. A second piston rod 35 extending to the outside of the second piston cylinder 20 is inserted into the inside of the second piston cylinder 20. A second telescopic spring 41 connected to the second piston rod 35 is provided on the inner wall of the second piston cylinder 20. An inclined guide rail 36 is provided on the top of the second piston rod 35. A locking pin 34 is slidably connected to the inner side of the inclined guide rail 36. A lifting frame 32 is connected to both ends of the locking pin 34. A connecting frame 27 is connected to one side of the lifting frame 32. A second annular baffle 25 located between the annular filter plate 26 and the first annular baffle 19 is provided at the end of the connecting frame 27 away from the lifting frame 32. The second annular baffle 25 is located above the transition ring 33.

[0039] In this configuration, the center of the second annular chamber 21 is coaxial with the center of the filter disc 22, the center of the stirring rod 11 is coaxial with the center of the filter disc 22, the inner wall of the second annular baffle 25 has the same diameter as the outer wall of the annular filter plate 26, and the outer wall of the second annular baffle 25 has the same diameter as the inner wall of the first annular baffle 19.

[0040] In this embodiment, when the filter disc 22 rotates counterclockwise with the stirring rod 11, the second annular baffle 25 moves away from the second piston cylinder 20 under the action of centrifugal force. This causes the inclined guide rail 36 to press against the locking pin 34, causing the locking pin 34 to move upward. When the locking pin 34 moves upward, it will drive the second annular baffle 25 upward through the lifting frame 32 and the connecting frame 27. This removes the obstruction from the outer wall of the annular filter plate 26, and at this time, the particulate sediment at the top of the filter disc 22 will be removed under the action of centrifugal force. The filter disc 22 is attached to the inner wall of the annular filter plate 26. As the filter disc 22 rotates, the aqueous solution attached to the surface of the particulate precipitate can pass through the annular filter plate 26 and fall to the inner wall of the first annular baffle 19. At this time, the aqueous solution on the inner wall of the first annular baffle 19 will pass through the transition ring 33 under its own gravity and enter the drain outlet 8. In this way, part of the aqueous solution attached to the surface of the particulate precipitate can be removed, thereby preventing a large amount of wastewater from being discharged with the particulate precipitate. This reduces the water content of the precipitate and reduces the amount of pollutants carried over.

[0041] Please refer to this carefully. Figure 3 , Figure 5 , Figure 7 , Figure 8 , Figure 9 The docking unit includes a U-shaped slide bar 23 that is slidably connected to the stirring rod 11. Float blocks 24 are provided at both ends of the U-shaped slide bar 23. A hexagonal insert rod 39 extending to the inner side of the second annular chamber 21 is inserted into the bottom end of the stirring rod 11. A hexagonal insertion hole 40 that fits into the hexagonal insert rod 39 is provided at the center of the filter disc 22. A limiting disc 37 is provided at the top of the hexagonal insert rod 39. A first telescopic spring 38 connected to the stirring rod 11 and located outside the hexagonal insert rod 39 is provided at the bottom of the limiting disc 37.

[0042] The inner side of the stirring rod 11 is provided with a groove that matches the U-shaped slide rod 23 and the limiting disc 37. The top of the second annular chamber 21 and the bottom of the stirring rod 11 are both provided with through holes that match the hexagonal insert 39. When the bottom of the hexagonal insert 39 is not aligned with the through hole at the top of the second annular chamber 21, the hexagonal insert 39 will rotate to the position aligned with the through hole at the top of the second annular chamber 21 under the action of the stirring rod 11. As the U-shaped slide rod 23 continuously presses the limiting disc 37, the hexagonal insert 39 will pass through the through hole at the top of the second annular chamber 21 and be inserted into the inside of the hexagonal insert 40.

[0043] In this embodiment, when wastewater is injected into the treatment tank body 1, the float 24 floats on the water surface. As the amount of wastewater injected increases, the float 24 gets closer to the tank cover 2. At this time, the top of the limiting disc 37 loses the pressure of the U-shaped slide rod 23, allowing the hexagonal insert 39 to retract into the bottom of the stirring rod 11 under the elastic restoring force of the first telescopic spring 38. At this time, the stirring rod 11 loses its connection with the second annular chamber 21, and the stirring rod 11 cannot drive the filter disc 22 to rotate when it rotates. When water is discharged from the main body of the treatment tank 1, the float 24 will move downward as the amount of wastewater decreases, thereby causing the U-shaped slide bar 23 to press the limiting disc 37, which in turn pushes the hexagonal insert 39 downward, so that the hexagonal insert 39 passes through the top of the second annular chamber 21 and is inserted into the inside of the hexagonal insertion hole 40, thereby connecting the filter disc 22 and the stirring rod 11. This prevents the second annular baffle 25 from losing its shielding of the annular filter plate 26 when a large amount of aqueous solution inside the main body of the treatment tank 1 has not been discharged from the main body of the treatment tank 1.

[0044] The working principle of this invention is as follows: Wastewater enters the body of the treatment tank 1 through the wastewater inlet pipe 4. When the wastewater is injected into the body of the treatment tank 1, the float 24 will float on the water surface. As the amount of wastewater injected increases, the float 24 gets closer to the tank cover 2. At this time, the top of the limiting disc 37 will lose the pressure of the U-shaped slide rod 23. Thus, the hexagonal insert 39 can be retracted into the bottom of the stirring rod 11 under the elastic restoring force of the first telescopic spring 38. At this time, the stirring rod 11 and the second annular chamber 21 will lose connection. When the stirring rod 11 rotates, it will not be able to drive the filter disc 22 to rotate.

[0045] A pH adjuster is added to the main body 1 of the treatment tank. Then, the servo motor 3 is started. The servo motor 3 drives the stirring rod 11 to rotate counterclockwise to agitate the wastewater in the main body 1 of the treatment tank. Then, a thallium removal agent is added to the main body 1 of the treatment tank. As the stirring rod 11 agitates the wastewater, the thallium removal agent reacts fully with the wastewater. At this time, particulate sediment will appear in the wastewater. Then, the valve 10 is opened and the wastewater is discharged to the next treatment process through the drain outlet 8. At this time, the particulate sediment will remain on the top of the filter disc 22.

[0046] As the wastewater is discharged from the main body of the treatment tank 1, the float 24 will move downward as the amount of wastewater decreases, so that the U-shaped slide bar 23 presses the limiting disc 37, causing the limiting disc 37 to push the hexagonal insert 39 downward, so that the hexagonal insert 39 passes through the top of the second annular chamber 21 and is inserted into the inside of the hexagonal insertion hole 40, thereby realizing the connection between the filter disc 22 and the stirring rod 11.

[0047] When the filter disc 22 rotates counterclockwise with the stirring rod 11, the second annular baffle 25 moves away from the second piston cylinder 20 under the action of centrifugal force. This causes the inclined guide rail 36 to press against the locking pin 34, causing the locking pin 34 to move upward. When the locking pin 34 moves upward, it will drive the second annular baffle 25 upward through the lifting frame 32 and the connecting frame 27. This removes the obstruction from the outer wall of the annular filter plate 26. At this time, the particulate sediment at the top of the filter disc 22 will be dispersed by the centrifugal force and the annular baffle 25. The inner walls of the annular filter plate 26 are in contact with each other. As the filter disc 22 rotates, the aqueous solution attached to the surface of the particulate precipitate can pass through the annular filter plate 26 and fall onto the inner wall of the first annular baffle 19. At this time, the aqueous solution on the inner wall of the first annular baffle 19 will pass through the transition ring 33 under its own gravity and enter the drain outlet 8. In this way, part of the aqueous solution attached to the surface of the particulate precipitate can be removed, thereby preventing a large amount of wastewater from being discharged with the particulate precipitate. This reduces the water content of the precipitate and reduces the amount of pollutants carried over.

[0048] When the servo motor 3 drives the stirring rod 11 to rotate clockwise, the ratchet 42, under the action of the pawl 43, drives the first annular chamber 12 to rotate. This causes the first piston rod 14 to move away from the first piston cylinder 13 under the action of centrifugal force. At this time, the first piston rod 14 will pull the top of the rotating connecting plate 15 to move the inner ring 18 upward, so that the outer ring 17 moves upward synchronously with the inner ring 18. In this way, the traction frame 16 can drive the first annular baffle 19. During the upward movement, the first annular baffle 19 moves the annular filter plate 26 upward through the transition ring 33, thus separating the annular filter plate 26 from the filter disc 22. At this time, the particulate sediment at the top of the filter disc 22 will fall to the inside of the slag discharge bin 6 under the action of centrifugal force, so that the particulate sediment enters the collection bin 7, thereby quickly treating the sediment inside the treatment tank body 1. This not only improves the wastewater treatment efficiency, but also eliminates the need for staff to clean the particulate sediment separately, reducing the labor intensity of the staff.

[0049] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A thallium removal device for lead-zinc smelting wastewater, comprising a treatment tank body (1) and a tank cover (2) installed on the top of the treatment tank body (1), characterized in that, A servo motor (3) is installed on the top of the tank cover (2). The output end of the servo motor (3) is connected to a stirring rod (11) extending to the inside of the treatment tank body (1). Wastewater inlet pipes (4) and reagent addition pipes (5) are provided on the top of the tank cover (2) on both sides of the servo motor (3). A slag discharge bin (6) is provided at the bottom edge of the treatment tank body (1). A material collection bin (7) is provided at the bottom of the slag discharge bin (6). The inner wall of the slag discharge bin (6) is equipped with a bottom plate with a diameter equal to that of the inner wall of the treatment tank body (1). The bottom of the bottom plate (9) is provided with a valve (10), and one end of the valve (10) is provided with a drain outlet (8) extending to the outside of the slag discharge bin (6) and located above the collection bin (7). A material barrier is provided between the bottom of the main body (1) of the treatment tank and the top of the bottom plate (9). A filter disc (22) is rotatably connected to the top of the bottom plate (9). A centrifugal draining device is provided on the top of the filter disc (22). A docking unit connected to the filter disc (22) is provided at the bottom of the stirring rod (11). The material barrier includes a first annular chamber (12) rotatably connected to one end of the stirring rod (11) near the servo motor (3). A ratchet (42) is fixedly connected to the stirring rod (11) and located inside the first annular chamber (12). A pawl (43) that meshes with the ratchet (42) is rotatably connected to the inner wall of the first annular chamber (12) via a rotating shaft. A torsion spring is engaged with the rotating shaft where the pawl (43) connects to the first annular chamber (12) via a slot. A first piston cylinder (13) is installed on the outer wall of the first annular chamber (12). A first piston rod (14) extending to the outside of the first piston cylinder (13) is inserted into the inside of the first piston cylinder (13). A first piston rod (14) is provided inside the first piston cylinder (13) and is connected to the first piston rod (14). The first piston rod (14) is connected to the third telescopic spring (44). The end of the first piston rod (14) away from the first piston cylinder (13) is rotatably connected to the rotating plate (15) via a rotating shaft. The bottom of the rotating plate (15) is rotatably connected to the inner ring (18) via a rotating shaft. The outer wall of the inner ring (18) is rotatably connected to the outer ring (17) via a bearing. The outer wall of the outer ring (17) is fixedly connected to the traction frame (16). The bottom end of the traction frame (16) is provided with a first annular baffle (19) located between the stirring rod (11) and the bottom plate (9). The inner wall of the first annular baffle (19) is rotatably connected to the transition ring (33) located above the filter disc (22). The inner wall of the transition ring (33) is connected to the annular filter plate (26). The material barrier also includes a telescopic rod (30) fixed to the top of the filter disc (22), the top of the telescopic rod (30) is provided with a positioning rod (28) connected to the top of the annular filter plate (26), the bottom of the telescopic rod (30) is provided with an L-shaped positioning plate (31), and the top of the L-shaped positioning plate (31) is provided with an annular scraper (29). The centrifugal discharge device includes a second annular chamber (21) installed on the top of the filter disc (22). A second piston cylinder (20) is installed on the outer wall of the second annular chamber (21). A second piston rod (35) extending to the outside of the second piston cylinder (20) is inserted into the interior of the second piston cylinder (20). A second telescopic spring (41) connected to the second piston rod (35) is provided on the inner wall of the second piston cylinder (20). An inclined guide rail (36) is provided on the top of the second piston rod (35). A locking pin (34) is slidably connected to the inner side of the inclined guide rail (36). A lifting frame (32) is connected to both ends of the locking pin (34). A connecting frame (27) is connected to one side of the lifting frame (32). A second annular baffle (25) is provided at the end of the connecting frame (27) away from the lifting frame (32) between the annular filter plate (26) and the first annular baffle (19). The second annular baffle (25) is located above the transition ring (33).

2. The thallium removal device for lead-zinc smelting wastewater according to claim 1, characterized in that, The outer wall of the annular scraper (29) is in contact with the top of the inner wall of the annular filter plate (26). The telescopic rod (30) is extended by the upward movement of the annular filter plate (26). At this time, the annular filter plate (26) will come into contact with the annular scraper (29) during the upward movement, so that the particulate sediment on the inner wall of the annular filter plate (26) is scraped by the annular scraper (29) and falls to the top of the filter disc (22).

3. The thallium removal device for lead-zinc smelting wastewater according to claim 1, characterized in that, The center of the second annular chamber (21) is coaxial with the center of the filter disc (22), and the center of the stirring rod (11) is coaxial with the center of the filter disc (22).

4. The thallium removal device for lead-zinc smelting wastewater according to claim 1, characterized in that, The inner wall of the second annular baffle (25) has the same diameter as the outer wall of the annular filter plate (26), and the outer wall of the second annular baffle (25) has the same diameter as the inner wall of the first annular baffle (19).

5. A thallium removal device for lead-zinc smelting wastewater according to claim 1, characterized in that, The docking unit includes a U-shaped slide rod (23) that is slidably connected to the stirring rod (11). The two ends of the U-shaped slide rod (23) are provided with floats (24). The bottom end of the stirring rod (11) is inserted with a hexagonal insert rod (39) that extends to the inside of the second annular chamber (21). The center of the filter disc (22) is provided with a hexagonal insertion hole (40) that matches the hexagonal insert rod (39). The top of the hexagonal insert rod (39) is provided with a limiting disc (37). The bottom of the limiting disc (37) is provided with a first telescopic spring (38) that is connected to the stirring rod (11) and located outside the hexagonal insert rod (39).

6. A thallium removal device for lead-zinc smelting wastewater according to claim 5, characterized in that, The inner side of the stirring rod (11) is provided with a groove that matches the U-shaped slide rod (23) and the limiting disc (37).

7. A thallium removal device for lead-zinc smelting wastewater according to claim 5, characterized in that, The top of the second annular chamber (21) and the bottom of the stirring rod (11) are both provided with through holes that fit the hexagonal insert (39). When the bottom of the hexagonal insert (39) is not aligned with the through hole at the top of the second annular chamber (21), the hexagonal insert (39) will rotate to the position aligned with the through hole at the top of the second annular chamber (21) under the action of the stirring rod (11). As the U-shaped slide rod (23) continuously presses the limiting disc (37), the hexagonal insert (39) will pass through the through hole at the top of the second annular chamber (21) and be inserted into the inside of the hexagonal insert (40).

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