A device for removing thallium metal in wastewater

Abstract

The application relates to a thallium metal removing device in water resources, which comprises a barrel body I provided with a cover plate, the bottom of the cover plate is provided with a barrel body II, the bottom of the barrel body II is provided with a necked portion, the necked portion is provided with an extrusion mechanism, the outer side of the necked portion is provided with a liquid outlet mechanism, a cylinder body is arranged on the cover plate, the side wall of the cylinder body in the barrel body II is in a hole structure, the side walls on the upper and lower ends of the cylinder body are provided with discharge ports, the upper and lower ends of the cylinder body are also provided with material collecting mechanisms I and II corresponding to the discharge ports, a cleaning seat is arranged in the cylinder body, a liquid inlet pipe is arranged on the cylinder body above the cleaning seat, a screw rod driven by a motor is arranged in the cleaning seat, a stirring paddle I fixed on the screw rod is arranged on the bottom of the necked portion, the bottom end of the screw rod extends to the bottom of the barrel body I and is movably connected with a cleaning mechanism, a liquid inlet mechanism is arranged in the screw rod, and a circulating mechanism connected with the liquid inlet mechanism is arranged on the bottom of the necked portion. The application has the advantages of simple structure and convenient use.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment, and in particular to a device for removing thallium metal from wastewater. Background Technology

[0002] Thallium is a highly dispersed rare metal element widely used in industries such as chemical, electronics, pharmaceutical, aerospace, high-energy physics, and superconducting materials. Thallium is mainly recovered as a byproduct from the smelting of non-ferrous heavy metal sulfide ores. Thallium oxides are highly volatile, and thallium is also a highly physiologically toxic element. Thallium-contaminated water can cause thallium poisoning in humans through ingestion, skin contact, or inhalation. With the rapid development of industrialization, large amounts of thallium-containing wastewater are discharged into the environment, causing serious pollution to water bodies and damaging the ecological environment. Therefore, the treatment of thallium-contaminated water sources is of paramount importance.

[0003] One example is a thallium removal device for wastewater, patent number CN219567615U. This device uses a preliminary sedimentation chamber and a filter screen to initially filter impurities in the wastewater. With the aid of a mixing and stirring structure, impurities in the wastewater can be circulated for filtration. The combination of a mixing reaction chamber, mixing and stirring structure, and feeding structure allows for precise addition of reaction reagents while ensuring thorough reaction. The combination of a sedimentation chamber and sediment discharge structure allows for continuous discharge of precipitates, enabling the wastewater thallium removal device to operate efficiently and continuously, significantly improving treatment efficiency. However, while achieving the above effects, it has the following drawbacks: the three-chamber layout increases the floor space and production costs; it cannot effectively clean impurities on the filter screen, leading to clogging and affecting subsequent filtration efficiency; and it cannot effectively distribute the reagent in different areas of the chambers and mix it thoroughly with the wastewater, thus affecting the mixing efficiency and overall effect. Summary of the Invention

[0004] The purpose of this invention is to provide a device for removing thallium metal from wastewater.

[0005] The technical problem of this invention is mainly solved by the following technical solution: A thallium metal removal device for wastewater includes a barrel I with a cover plate, a barrel II located inside the barrel I at the bottom of the cover plate, a constricted section at the bottom of the barrel II, a vertically movable squeezing mechanism inside the constricted section, a liquid discharge mechanism outside the constricted section, a cylindrical body sealed at both ends on the cover plate, the inner sidewall of the cylindrical body II having a perforated structure, discharge ports at both the upper and lower sidewalls of the cylindrical body, a collection mechanism I and a collection mechanism II corresponding to the discharge ports at the upper and lower ends of the cylindrical body, a cleaning seat inside the cylindrical body, a liquid inlet pipe above the cleaning seat, a screw driven by a motor in the cleaning seat, a stirring paddle I fixed to the screw at the bottom of the constricted section, the bottom end of the screw extending to the bottom of the barrel I and movably connected to the cleaning mechanism, a liquid inlet mechanism in the screw, and a circulation mechanism connected to the liquid inlet mechanism at the bottom of the constricted section. The liquid inlet mechanism includes a grid plate inside the cylinder above the discharge port, which forms a liquid storage chamber with the grid plate and the side wall of the cylinder above it. A drug inlet pipe is provided on the liquid storage chamber. A flow channel is provided in the side wall of the screw. A connecting port I and a one-way water outlet pipe are respectively provided at the upper and lower ends of the side wall of the screw, wherein the connecting port I is connected to the liquid storage chamber.

[0006] Preferably, the material collection mechanism I includes an annular seat I screwed to the bottom of the cylinder, the annular seat I is provided with a storage cavity, the bottom of the storage cavity is provided with a drain hole, and the inner side wall of the annular seat I is uniformly provided with a slag discharge port I that connects the lower discharge port and the storage cavity.

[0007] Preferably, the material collection mechanism II includes an annular seat II disposed on the top of the cover plate, and the top of the annular seat II is provided with a collection groove.

[0008] Preferably, the cleaning seat is provided with a screw hole for screwing the screw, the lower half of the outer wall of the cleaning seat is surrounded by a groove corresponding to the lower discharge port, and the liquid inlet pipe is provided with a coiled pipe connected to the cylinder.

[0009] Preferably, the extrusion mechanism includes a pressure plate driven by a hydraulic rod, the output shaft of the hydraulic rod is connected to the pressure plate via a vertical rod, the pressure plate seals the opening of the constricted section, the one-way water outlet pipe is located below the pressure plate, and the bottom of the pressure plate is provided with a skirt located inside the opening of the constricted section, and U-shaped notches are evenly provided on the side wall of the skirt.

[0010] Preferably, the liquid outlet mechanism includes a housing disposed outside the constricted portion, a communication port II communicating with the inside of the housing is provided at the bottom of the side wall of the constricted portion, water outlets are uniformly disposed at the top of the side wall of the housing, and an annular seat III sealing the communication port II is also disposed in the cavity formed between the housing and the constricted portion, and an inclined surface is provided on the bottom corner edge of the inner side wall of the annular seat III.

[0011] Preferably, a stirring paddle II is provided on the screw inside the liquid storage chamber.

[0012] Preferably, the circulation mechanism includes a circulation pipe, one end of which is connected to the bottom of the constricted portion, and the other end of which is connected to the liquid storage chamber. A water pump is installed on the circulation pipe.

[0013] Preferably, the bottom side wall of the barrel I is provided with a liquid outlet pipe and a slag discharge pipe, with the liquid outlet pipe located above the slag discharge pipe.

[0014] Preferably, the cleaning mechanism includes a sleeve located at the bottom of the inner wall of the barrel I, a round rod is provided inside the sleeve, an electromagnet is provided at the top of the round rod and attached to the bottom of the screw, and a scraper attached to the bottom wall of the inner wall of the barrel I is fixed on the round rod above the sleeve by an L-shaped rod.

[0015] The beneficial effects of this invention are as follows: This invention filters liquid through the side wall apertures of the cylinder, and the filtered liquid enters the constriction section to mix with the reagent. In the above process, through the cooperation of the circulation mechanism and the liquid inlet mechanism, the reagent and the circulating liquid are initially mixed and then sprayed to different areas in the constriction section. This allows the liquid sprayed from the one-way water outlet pipe in the liquid inlet mechanism to cover different areas in the constriction section, thereby further improving the coverage of the sprayed reagent in the constriction section and ensuring thorough mixing with the liquid. At the same time, the rotating screw drives the cleaning seat to move up and down to clean the filter material on the inner wall of the cylinder, preventing the side wall apertures from becoming blocked and affecting subsequent filtration. The rotating screw drives the stirring paddles I and II to rotate, which further accelerates the mixing efficiency and effect of the liquid and the reagent. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the present invention; Figure 2 yes Figure 1 A structural diagram in another state; Figure 3 yes Figure 1 Enlarged view of point A in the middle; Figure 4 This is a cross-sectional view of the screw in this invention.

[0017] In the diagram: 1. Barrel I, 2. Cover plate, 3. Barrel II, 4. Narrowing section, 5. Extrusion mechanism, 51. Pressure plate, 52. Hydraulic rod, 53. Skirt, 54. U-shaped notch, 6. Liquid discharge mechanism, 61. Shell, 62. Connecting port II, 63. Water outlet, 64. Annular seat III, 7. Cylinder, 8. Discharge port, 9. Collection mechanism I, 91. Annular seat I, 92. Storage chamber, 93. Slag discharge port, 10. Collection mechanism II, 101. Annular seat II, 102. Collection tank, 11. Cleaning seat, 12. 13. Inlet pipe, 14. Screw, 15. Motor, 16. Stirring paddle I, 17. Cleaning mechanism, 18. Sleeve, 19. Round rod, 10. Electromagnet, 11. Scraper, 12. Inlet mechanism, 13. Grid plate, 14. Liquid storage chamber, 15. Medicine inlet pipe, 16. Flow channel, 17. Connecting port I, 17. One-way water outlet pipe, 18. Circulation mechanism, 19. Circulation pipe, 10. Water pump, 11. Groove, 22. Coil pipe, 23. Stirring paddle II, 24. Inlet pipe, 25. Slag discharge pipe. Detailed Implementation

[0018] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0019] A thallium metal removal device for wastewater includes a barrel I1 with a cover plate 2, a barrel II3 located inside the barrel I1 at the bottom of the cover plate 2, a constricted portion 4 at the bottom of the barrel II3, a squeezing mechanism 5 that can move up and down inside the constricted portion 4, and a liquid discharge mechanism 6 on the outside of the constricted portion 4.

[0020] The cover plate 2 is provided with a cylindrical body 7 sealed at both the upper and lower ends. The inner wall of the cylindrical body 7 is perforated. Both the upper and lower side walls of the cylindrical body 7 are provided with discharge ports 8. The upper and lower ends of the cylindrical body 7 are also provided with a material collection mechanism I9 and a material collection mechanism II10 corresponding to the discharge ports 8. A cleaning seat 11 is provided inside the cylindrical body 7. A liquid inlet pipe 12 is provided on the cylindrical body 7 above the cleaning seat 11. A screw 13 driven by a motor 14 is also provided in the cleaning seat 11. A stirring paddle I15 fixed on the screw 13 is provided at the bottom of the constricted part 4. A screw hole for screwing the screw 13 is provided in the cleaning seat 11. In this embodiment, the side wall of the screw 13 located outside the cylindrical body 7 is smooth. A groove 19 corresponding to the discharge port 8 is provided around the lower half of the outer side wall of the cleaning seat 11. A coiled pipe 20 connected to the cylindrical body 7 is provided on the liquid inlet pipe 12.

[0021] The bottom end of the screw 13 extends to the bottom of the barrel I1 and is movably connected to the cleaning mechanism 16. The screw 13 is provided with a liquid inlet mechanism 17, and the bottom of the constricted part 4 is provided with a circulation mechanism 18 connected to the liquid inlet mechanism 17. The liquid inlet mechanism 17 includes a grid plate 171 located inside the cylinder 7 above the discharge port 8. The grid plate 171 and the side wall of the cylinder 7 above it form a liquid storage chamber 172. A stirring paddle II 21 is provided on the screw 13 inside the liquid storage chamber 172. A drug inlet pipe 173 is provided on the liquid storage chamber 172. A flow channel 174 is provided in the side wall of the screw 13. A connecting port I 175 communicating with the flow channel 174 and a one-way water outlet pipe 176 are respectively provided at the upper and lower ends of the side wall of the screw 13, wherein the connecting port I 175 is connected to the liquid storage chamber 172.

[0022] The material collection mechanism I9 includes an annular seat I91 screwed to the bottom of the cylinder 7. The annular seat I91 is provided with a storage cavity 92. The bottom of the storage cavity 92 is provided with a drain hole. The inner side wall of the annular seat I91 is evenly provided with slag discharge ports I93 that connect the lower discharge port 8 and the storage cavity 92.

[0023] The material collection mechanism II10 includes an annular seat II101 disposed on the top of the cover plate 2, and a collection groove 102 is disposed on the top of the annular seat II101.

[0024] The extrusion mechanism 5 includes a pressure plate 51 driven by a hydraulic rod 52. The output shaft of the hydraulic rod 52 is connected to the pressure plate 51 via a vertical rod. The pressure plate 51 seals the opening of the constriction section 4. The one-way water outlet pipe 176 is located below the pressure plate 51. The bottom of the pressure plate 51 is provided with a skirt 53 located inside the opening of the constriction section 4. U-shaped notches 54 are evenly provided on the side wall of the skirt 53.

[0025] The liquid outlet mechanism 6 includes a housing 61 disposed outside the constriction portion 4. The bottom of the side wall of the constriction portion 4 is provided with a communication port II 62 communicating with the inside of the housing 61. The top of the side wall of the housing 61 is uniformly provided with water outlets 63. The cavity formed between the housing 61 and the constriction portion 4 is also provided with an annular seat III 64 that seals the communication port II 62.

[0026] The circulation mechanism 18 includes a circulation pipe 181, one end of which is connected to the bottom of the constriction portion 4, and the other end of which is connected to the liquid storage chamber 172. A water pump 182 is installed on the circulation pipe 181.

[0027] In this embodiment, a liquid outlet pipe 22 and a slag discharge pipe 23 are provided on the bottom side wall of the barrel I1, with the liquid outlet pipe 22 located above the slag discharge pipe 23.

[0028] The cleaning mechanism 16 includes a sleeve 161 located at the bottom of the barrel I1. A round rod 162 is provided inside the sleeve 161. An electromagnet 163 is provided at the top of the round rod 162 and is attached to the bottom of the screw 13. A scraper 164 attached to the bottom wall of the barrel I1 is fixed on the round rod 162 above the sleeve 161 by an L-shaped rod.

[0029] In use, wastewater is injected into the cylinder 7 above the cleaning seat 11 through the inlet pipe 12. The liquid is filtered through the side wall holes of the cylinder 7 and falls into the barrel II3 above the pressure plate 51, thus filtering impurities in the liquid through the side wall holes of the cylinder 7. When there is a lot of liquid in the barrel II3 above the pressure plate 51, the hydraulic rod 52 drives the pressure plate 51 to move upward through the vertical rod and slides into the barrel II3 through the opening of the constriction 4. At this time, the pressure plate 51 drives the U-shaped notch 54 on the skirt 53 to move upward and be exposed in the barrel II3. Then, the filtered liquid in the barrel II3 flows into the constriction 4 through the gap between the pressure plate 51 and the inner wall of the barrel II3 and the U-shaped notch 54. When the liquid level in the constriction 4 reaches the standard, the pressure plate 51 moves downward to separate the constriction 4 from the barrel II3, preventing the liquid in the barrel II3 from continuing to flow into the constriction 4.

[0030] When the liquid enters the opening of the constriction section 4, the water pump 182 draws the liquid from the bottom opening of the constriction section 4 into the storage chamber 172 through the circulation pipe 181. The reagent is added into the storage chamber 172 through the drug inlet pipe 173. After the reagent mixes with the circulating liquid, it enters the flow channel 174 through the connecting port I175 and then is sprayed outward through several one-way water outlet pipes 176. This causes the liquid mixed with the reagent to be sprayed around the constriction section 4 and cover different areas of the liquid in the constriction section 4. At the same time, the liquid sprayed out can also agitate the liquid in the constriction section 4 to mix it thoroughly with the reagent, so that the reagent covers the liquid in different areas of the constriction section 4 and can also mix it thoroughly with the liquid.

[0031] During the above process, the motor 14 drives the screw 13 to rotate. The screw 13 then drives the stirring paddle I15 to rotate, thereby agitating the liquid in the constriction section 4 to fully mix it with the reagent. The screw 13 also drives the stirring paddle II21 to rotate, agitating and mixing the circulating liquid and added reagent in the storage chamber 172. This initial mixing is then introduced into the constriction section 4 to contact and mix with the wastewater, thereby improving the efficiency and effect of the subsequent mixing reaction. As the screw 13 rotates, it drives several one-way water outlet pipes 176 to rotate, allowing the liquid sprayed from the one-way water outlet pipes 176 to cover different areas within the constriction section 4, further increasing the coverage of the sprayed reagent within the constriction section 4 and ensuring thorough mixing with the liquid. Simultaneously, the screw 13 rotates within the screw hole in the cleaning seat 11. The cleaning seat 11 has a polygonal cross-section to prevent the screw 13 from rotating inside the screw hole and failing to drive the cleaning seat 11 to move up and down. When the cleaning seat 11 moves upward, its top can scrape off the impurities filtered on the inner wall of the cylinder 7, causing the impurities to be pushed upward. In this embodiment, when the cleaning seat 11 moves upward and blocks the outlet end of the liquid inlet pipe 12, the liquid inside can enter the cylinder 7 through the coil pipe 20 and be filtered by its side wall aperture. When the cleaning seat 11 moves upward and blocks and seals the coil pipe 20, the outlet end of the liquid inlet pipe 12 is directly opposite the groove 19. Then the liquid introduced by the liquid inlet pipe 12 can enter the groove 19 and be drained out by the corresponding side wall aperture of the cylinder 7. This allows the liquid to be filtered at the same time when the inner wall of the cylinder 7 is cleaned by moving the cleaning seat 11, without having to close the liquid inlet pipe 12.

[0032] like Figure 2 As shown, when the top of the cleaning seat 11 moves upward to the upper discharge port 8, the impurities scraped off from its top can be collected in the collection trough 102 of the collecting mechanism II10 through the upper discharge port 8. During the above process, since no liquid enters the cylinder 7 below the cleaning seat 11 and is filtered by its side wall aperture, no impurities will adhere to the inner wall of the cylinder 7 at the bottom of the cleaning seat 11 after cleaning by the upward-moving cleaning seat 11. Only the side wall of the cylinder 7 at the groove 19 at this time will have impurities adhering to it due to continuous liquid filtration. When the cleaning seat 11 moves downward, it will scrape off some of the above impurities through the top side wall of the groove 19. When the cleaning seat 11 returns to its original position, as shown... Figure 1As shown, impurities scraped off from the top sidewall of the groove 19 can enter the storage chamber 92 through the discharge port 8 and slag discharge port 93 and be collected. Liquids that may be present are drained through the drain hole. In the subsequent process, the impurities in the storage chamber 92 can be discharged and cleaned through the discharge pipe. The screw 13 rotates in both directions, driving the cleaning seat 11 to move up and down, thereby cleaning the impurities filtered on the inner wall of the cylinder 7, preventing impurities from clogging the pores and affecting the subsequent filtration work. At the same time, the rotating screw 13 drives the stirring paddle I15 and stirring paddle II21 to rotate, which can effectively enhance the mixing efficiency and effect of liquid and reagent in the constriction 4 and liquid and reagent in the storage chamber 172. In the above process, when the screw 13 is rotating, the electromagnet 163 is not energized, causing the cleaning mechanism 16 to separate from the bottom of the screw 13. Therefore, the rotating screw 13 cannot drive the cleaning mechanism 16 to rotate. At this time, the cleaning mechanism 16 will not stir the sediment at the bottom of the barrel I1, so that it will not affect the sedimentation work at the bottom of the barrel I1.

[0033] After the liquid and reagent in the constriction section 4 are fully mixed, the hydraulic rod 52 drives the pressure plate 51 and skirt 53 to move downward, thereby squeezing the liquid in the constriction section 4. The pressurized liquid flows into the housing 61 through the connecting port II 62 and exerts an upward thrust on the annular seat III 64, pushing the annular seat III 64 to move above the outlet 63, as detailed below. Figure 2 As shown, the liquid in the constricted section 4 can be squeezed by the squeezing mechanism 5 and then smoothly introduced into the bottom of the barrel I1 by the liquid discharge mechanism 6 for sedimentation. In order to allow the liquid discharged from the connecting port II 62 to smoothly enter the shell 61 and lift the annular seat III 64, an inclined surface is provided on the bottom corner edge of the inner side wall of the annular seat III 64 in this embodiment. After the liquid flowing out of the connecting port III 64 enters the bottom of the shell 61, the pushing force generated by the liquid entering the shell 61 gradually increases, thereby pushing the annular seat III 64 upward to above the outlet 63 by lifting the inclined surface. When the liquid in the constricted section 4 is discharged, the squeezing mechanism 5 resets upward during the process of the annular seat III 64 being discharged. The seat III64 moves down to reset, and then the pressure plate 51 moves up into the barrel II3 so that the liquid inside can be introduced into the constriction section 4 for the next batch of mixing. In this embodiment, the reason why a discharge pipe is not provided at the bottom of the constriction section 4 for the liquid inside to be discharged into the bottom of the barrel I1 is because it is inconvenient for people to enter the barrel I1 to operate it during processing. At the same time, by providing a discharge pipe with a solenoid valve, the components will work in a humid environment for a long time, which will affect their service life and safety. Furthermore, the liquid is squeezed by the squeezing mechanism 5 to increase the pressure, which can improve the mixing effect of the reagent and wastewater in the liquid. The residual liquid at the bottom of the constriction section 4 can be extracted by the circulation mechanism 18 for recycling.

[0034] After the liquid settles at the bottom of the tank I1, the clarified liquid is discharged through the outlet pipe 22. When it is necessary to discharge the sediment at the bottom of the tank I1, the electromagnet 163 is energized after the liquid is discharged, so that the electromagnet 163 is magnetically connected to the bottom end of the screw 13. When the screw 13 rotates, it will drive the round rod 162 to rotate inside the sleeve 161 through the electromagnet 163. At this time, the round rod 162 will also drive the scraper 164 to rotate together through the L-shaped rod, so that the scraper 164 agitates the sediment. After mixing with the residual liquid, it is discharged through the slag discharge pipe 23. During the above process, the screw 13 rotates clockwise and counterclockwise, causing the cleaning mechanism 16 to rotate in the same direction, at the same speed and with the same amplitude. This prevents the cleaning mechanism 16 from rotating indefinitely in one direction and breaking the wire connected to the electromagnet 163. When the sediment at the bottom of the tank I1 is discharged, the electromagnet 163 is de-energized, which separates the cleaning mechanism 16 from the screw 13 to prevent the cleaning mechanism 16 from continuing to rotate and affecting the sedimentation work at the bottom of the tank I1.

[0035] The present invention has been described in detail above, but the content described is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A thallium metal removal device for wastewater, comprising a tank body I with a cover plate, characterized in that: The bottom of the cover plate is provided with a barrel II located inside barrel I. The bottom of barrel II is provided with a constricted section. The constricted section is provided with a squeezing mechanism that can move up and down. A liquid discharge mechanism is provided on the outside of the constricted section. The cover plate is provided with a cylinder that is sealed at both the top and bottom. The inner side wall of the cylinder of barrel II has a perforated structure. Both the top and bottom side walls of the cylinder are provided with discharge ports. The top and bottom of the cylinder are also provided with a material collection mechanism I and a material collection mechanism II corresponding to the discharge ports. A cleaning seat is provided inside the cylinder. A liquid inlet pipe is provided on the cylinder above the cleaning seat. The cleaning seat is also provided with a screw driven by a motor. The bottom of the constricted section is provided with a stirring paddle I fixed on the screw. The bottom end of the screw extends to the bottom of the barrel I and is movably connected to the cleaning mechanism. A liquid inlet mechanism is provided in the screw. A circulation mechanism connected to the liquid inlet mechanism is provided at the bottom of the constricted section. The liquid inlet mechanism includes a grid plate disposed in the cylinder above the discharge port. The grid plate and the side wall of the cylinder above it form a liquid storage chamber. A drug inlet pipe is disposed on the liquid storage chamber. A flow channel is disposed in the side wall of the screw. A connecting port I and a one-way water outlet pipe are respectively disposed at the upper and lower ends of the side wall of the screw, wherein the connecting port I is connected to the liquid storage chamber.

2. The thallium metal removal device for wastewater according to claim 1, characterized in that: The material collection mechanism I includes an annular seat I screwed to the bottom of the cylinder. The annular seat I is provided with a storage cavity. The bottom of the storage cavity is provided with a drain hole. The inner side wall of the annular seat I is uniformly provided with slag discharge ports I that connect the lower discharge port and the storage cavity.

3. The thallium metal removal device for wastewater according to claim 1, characterized in that: The material collection mechanism II includes an annular seat II disposed on the top of the cover plate, and a collection groove is provided on the top of the annular seat II.

4. The thallium metal removal device for wastewater according to claim 1, characterized in that: The cleaning seat is provided with a screw hole for screwing the screw, and the lower half of the outer wall of the cleaning seat is surrounded by a groove corresponding to the discharge port below. The liquid inlet pipe is provided with a coiled pipe connected to the cylinder.

5. The thallium metal removal device for wastewater according to claim 1, characterized in that: The extrusion mechanism includes a pressure plate driven by a hydraulic rod. The output shaft of the hydraulic rod is connected to the pressure plate via a vertical rod. The pressure plate seals the opening of the constriction section. The one-way water outlet pipe is located below the pressure plate. The bottom of the pressure plate is provided with a skirt located inside the opening of the constriction section. U-shaped notches are evenly arranged on the side wall of the skirt. When there is a lot of liquid in the barrel II above the pressure plate, the hydraulic rod drives the pressure plate to move upward through the vertical rod and slide into the barrel II through the opening of the constriction section. At this time, the pressure plate drives the U-shaped notches on the skirt to move upward and be exposed inside the barrel II. Then, the filtered liquid in the barrel II flows into the constriction section through the gap between the pressure plate and the inner wall of the barrel II and the U-shaped notches. When the liquid level in the constriction section reaches the standard, the pressure plate moves downward to separate the constriction section from the barrel II, preventing the liquid in the barrel II from continuing to flow into the constriction section. The liquid dispensing mechanism includes a housing disposed on the outside of the constricted portion. The bottom of the side wall of the constricted portion is provided with a communication port II communicating with the inside of the housing. The top of the side wall of the housing is uniformly provided with water outlets. An annular seat III is also provided in the cavity formed between the housing and the constricted portion to seal the communication port II. An inclined surface is provided on the bottom corner edge of the inner side wall of the annular seat III. When the liquid and reagent in the constricted portion are fully mixed, the hydraulic rod drives the pressure plate and skirt to move down, thereby squeezing the liquid in the constricted portion. The compressed liquid flows into the housing through the communication port II and exerts an upward thrust on the annular seat III, so as to push the annular seat III to move above the water outlet.

6. The thallium metal removal device for wastewater according to claim 1, characterized in that: A stirring paddle II is installed on the screw inside the liquid storage chamber.

7. The thallium metal removal device for wastewater according to claim 1, characterized in that: The circulation mechanism includes a circulation pipe, one end of which is connected to the bottom of the constricted section, and the other end of which is connected to the liquid storage chamber. A water pump is installed on the circulation pipe.

8. The thallium metal removal device for wastewater according to claim 1, characterized in that: The bottom side wall of the barrel I is provided with a liquid outlet pipe and a slag discharge pipe, with the liquid outlet pipe located above the slag discharge pipe.

9. The thallium metal removal device for wastewater according to claim 1, characterized in that: The cleaning mechanism includes a sleeve located at the bottom of the inner barrel I, a round rod installed inside the sleeve, an electromagnet attached to the top of the round rod and attached to the bottom of the screw, and a scraper attached to the bottom wall of the inner barrel I by means of an L-shaped rod on the round rod above the sleeve.

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