Mercury treatment device and method for acidic mercury-containing wastewater

Abstract

This invention relates to the field of wastewater treatment, specifically to a mercury treatment device for acidic mercury-containing wastewater. The device includes a glove box body with an observation window on its surface. Inside the glove box body, near the wastewater inlet, are sequentially arranged a primary screening mechanism, a mixing mechanism, and a separation mechanism. Outside the glove box body, near the wastewater outlet, is a filter cartridge. The separation mechanism includes a sedimentation component, a polymerization component, and a filtration component. In this design, the upper inclined platform, middle inclined platform, and lower inclined trough correspond to the surface, middle, and bottom sediments of the wastewater, respectively. The traditional sampling and detection method is replaced with multi-point wide-area detection. Furthermore, the absence of stirring blades inside the material platform avoids sediment accumulation zones caused by stirring blades. The movement of the dosing plate and the flow of wastewater within the upper, middle, and lower inclined platforms significantly reduce eddy dead zones, facilitating the detection of excessive or insufficient sulfide dosage.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment, specifically to a mercury treatment apparatus and method for acidic mercury-containing wastewater. Background Technology

[0002] Mercury is a chemical element with the symbol Hg. It is the only metal that exists in a liquid state at room temperature and pressure. It is an inert metal and combines with oxygen slowly, but it reacts with sulfur when mixed and ground to form non-toxic mercuric sulfide (HgS). This reaction can be used to deal with spilled mercury. Mercury is insoluble in reducing acids and alkalis, but it is soluble in oxidizing acids, such as nitric acid and hot concentrated sulfuric acid. Mercury is an element with strong neurotoxicity. Its elemental form and many compounds have varying degrees of toxicity and can cause chronic poisoning.

[0003] Currently, there are several mature industrial treatment solutions for acidic mercury-containing wastewater, including chemical precipitation, adsorption, and ion exchange. Among these, chemical precipitation is the mainstream method, widely used for wastewater of various concentrations, and has relatively low treatment costs. Currently, in laboratories related to industries such as mercury switches, thermometers, and sphygmomanometers, some mercury-containing wastewater is generated intermittently due to experiments. The mercury concentration fluctuates greatly and often contains complexing agents such as EDTA and citrate. Although the wastewater volume is small, long-term accumulation can lead to mercury concentrations exceeding those of industrial wastewater, requiring periodic batch treatment to ensure the safety of laboratory personnel. When treating acidic mercury-containing wastewater, precise control of the sulfide dosage is crucial; both excessive and insufficient dosage can cause serious problems. Excessive dosage requires subsequent treatment, and excessive sulfides can react with HgS. The reaction generates soluble complexes, which in turn cause the precipitated mercury to redissolve, especially at low mercury concentrations. Insufficient addition leads to incomplete mercury precipitation and excessive mercury concentration in the effluent. Therefore, after the initial addition of sulfide and thorough stirring, it is often necessary to take samples and add trace amounts of sulfide for testing to check whether the addition is excessive or insufficient. However, during sampling, since the reactants and the post-reaction solution are colloidal suspensions, the vertical concentration gradient caused by sedimentation affects the sampling effect. Small samples cannot reflect the true concentration, while large samples are time-consuming, labor-intensive, and troublesome. To address this, we propose a mercury treatment device and method for acidic mercury-containing wastewater. Summary of the Invention

[0004] The purpose of this invention is to provide a mercury treatment device for acidic mercury-containing wastewater to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, a mercury treatment device for acidic mercury-containing wastewater includes a glove box body. The surface of the glove box body is provided with an observation window. Inside the glove box body, a primary screening mechanism, a mixing mechanism, and a separation mechanism are sequentially arranged at one end near the wastewater inlet. Outside the glove box body, a filter cartridge is provided at one end near the wastewater outlet. The separation mechanism includes a sedimentation component, a polymerization component, and a filtration component. The sedimentation component is used for stratification of the wastewater after initial feeding and stirring. The polymerization component is used to aggregate the wastewater towards the sedimentation component and to detect whether the sulfide dosage in the wastewater is sufficient. The filtration component is used to filter out the reactants generated after the wastewater is fed. Furthermore, the precipitation assembly includes a drive unit and a material stage; The drive unit includes a drive motor, which is fixedly installed on the top of the inner wall of the glove box body. A wire feeder is fixedly installed at the output end of the drive motor, and multiple strands of hanging wire are wound around the surface of the wire feeder. The upper side of the material platform is provided with an upper inclined platform, a middle inclined platform and a lower inclined trough in sequence from top to bottom. The lower ends of the multiple strands of the lifting wire pass through the winding shaft and are fixedly connected to the corner of the upper inclined platform. The inner walls of the upper inclined platform, the middle inclined platform and the lower inclined trough are all provided with a slope of not less than 45 degrees. The inner sides of the upper inclined platform, the middle inclined platform and the lower inclined trough are provided with telescopic boxes. The number of middle inclined platforms is not less than one.

[0006] Furthermore, the telescopic box includes, from top to bottom, box bodies A, B, and C, which are nested together, corresponding to the upper inclined platform, middle inclined platform, and lower inclined groove. The lower ends of the outer walls of box bodies A, B, and C are respectively provided with a number of water inlet grooves A, B, and C.

[0007] Furthermore, the upper inclined platform is vertically slidably connected to the lower end of the outer wall of the box A. The outer wall of the box A is provided with a stop block on the upper side of the water inlet trough A. The middle inclined platform is fixedly connected to the lower end of the outer wall of the box B. The top of the box C is fixedly connected with an inner stop. The position of the inner stop matches the position of the water inlet trough B. The lower side of the inner stop is provided with an opening that matches the position of the water inlet trough B. A spring box is embedded at one end of the lower inclined trough near the bottom of the box C. An outer stop is provided at the movable end of the spring box. The position of the outer stop matches the position of the water inlet trough C. The upper end of the outer stop is higher than the upper end of the inner wall of the water inlet trough C. A connecting drain outlet is provided between the box A, box B and box C.

[0008] Furthermore, the polymerization component includes a fixed frame, which is fixedly connected to the inner wall of the glove box body and located on the upper side of the material platform. Movable blocks are slidably connected to the outer walls at both ends of the fixed frame. Limiting blocks are provided on both sides of the movable blocks on the outer walls of the fixed frame. The movable blocks are vertically slidably connected to the inner wall of the dosing plate. A dosing box is fixedly installed on the top of the dosing plate. The outer wall of the dosing plate is provided with a dosing port and a control switch corresponding to the height of the upper and middle inclined platforms after they are unfolded. An actuation rod matching the position of the control switch is fixedly connected to the inner wall of the glove box body.

[0009] Furthermore, a lifting beam is vertically slidably connected to the upper end of the material platform, and the height of the two ends of the lifting beam gradually decreases towards the middle. The top of the top box is a smooth arc shape, and the top of the box A is fixedly connected to the top of the box body.

[0010] Furthermore, the filter assembly includes a storage cavity, which is located inside the material platform. One end of the storage cavity is connected to the bottom of the drain outlet, and a filter bag is provided at the connection between the storage cavity and the drain outlet.

[0011] Furthermore, the primary screening mechanism includes a primary screening chamber, the inner wall of which is provided with a plurality of partitions, and a wastewater flow port is provided between the top or bottom of the plurality of partitions and the inner wall of the primary screening chamber. An inlet pipe is fixedly installed on the outer wall of the glove box body, and one end of the inlet pipe is connected to the inside of the primary screening chamber.

[0012] Furthermore, the mixing mechanism includes a drug delivery box and a pump. The drug delivery box is fixedly installed on the top of the inner wall of the glove box body. The feed end of the pump is connected to the primary screening chamber and the discharge end of the drug delivery box through a feed pipe. The liquid outlet pipe of the pump extends to the upper side of the upper inclined platform.

[0013] The present invention also provides a method for treating mercury in acidic mercury-containing wastewater, comprising the following steps: S1, pH adjustment: Refer to the laboratory wastewater storage records, add sodium bicarbonate to the wastewater and stir. After the pH value is maintained in the range of 8-10, send the pH-adjusted wastewater into the main body of the glove box through the inlet pipe. S2, Sulfidation reaction: The pump starts and draws wastewater from the primary screening chamber, and then draws sulfides such as sodium sulfide Na2S from the dosing tank. During the process, the drawn wastewater and sodium sulfide Na2S come into contact with the pump impeller, are dispersed and stirred, and then fall from the pump discharge end onto the upper side of the material platform. S3. Wastewater stratification: After the sodium sulfide Na2S is put in and comes into full contact with the mercury in the wastewater, the drive motor starts and controls the upper inclined platform to rise by the wire feeder, suspension line and winding spool. The upper inclined platform then makes the tank B also rise by the contact between tank A and tank B. S4. Feeding detection: As box A is pulled up by the upper inclined platform, the top box of box A contacts the lifting beam. With the help of the fixing frame, the dosing plates on both sides of the upper inclined platform approach the upper inclined platform. Finally, after the touch rod contacts the control switch, a trace amount of sodium sulfide Na2S solution is controlled to be sprinkled from the dosing port onto the upper inclined platform, the middle inclined platform and the lower inclined trough. Observe whether there is still mercuric sulfide HgS generated, and then control whether to continue to supplement sodium sulfide Na2S or ferric chloride FeCl3 to eliminate excess sulfides. S5. Wastewater Discharge: The drive motor starts and the suspension line is gradually released. The upper inclined platform loses its restraint and gradually falls under the influence of gravity. During the process, as the height of the upper inclined platform decreases, the inlet tank A is exposed, and the wastewater in the upper inclined platform can pass through the inlet tank A and enter the drain outlet. In the middle inclined platform, as the box B subsequently falls with the upper inclined platform, the inner baffle no longer blocks the inlet tank B, and the wastewater also enters the drain outlet through the inlet tank B and the opening. In the lower inclined trough, when the middle inclined platform falls, the lower end of the middle inclined platform presses the outer baffle back into the spring box, allowing this part of the wastewater to enter the drain outlet through the inlet tank C. The wastewater entering the drain outlet is screened out by the filter bag to remove the treated mercuric sulfide, and then discharged to the filter cartridge, where the multi-layer activated carbon filled in the filter cartridge completes the final adsorption.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. In this scheme, the upper inclined platform, middle inclined platform, and lower inclined trough correspond to the surface, middle, and bottom sedimentation layers of wastewater, respectively. The traditional sampling and testing method is replaced by multi-point wide-area testing. Furthermore, no stirring blades are installed inside the material platform, which avoids the sediment enrichment zone caused by stirring blades. The movement of the dosing plate and the flow of wastewater in the upper, middle, and lower inclined platforms can greatly reduce the dead zone of eddy currents, making it easier to detect excessive or insufficient sulfide dosage. When there is excessive sulfide, ferric chloride can be added to disrupt the colloidal stability and cause mercuric sulfide to re-aggregate from the waste liquid into filterable particles. When the sulfide dosage is insufficient, the amount of mercuric sulfide generated again after the sulfide is added in the upper, middle, and lower inclined platforms should be considered, and sulfide should be replenished. 2. In this scheme, the gradually descending upper and middle inclined platforms, as well as the shrinking spaces inside boxes A, B, and C, combined with the impact of the wastewater falling, can gradually increase the pressure inside the filter bag, enabling the wastewater to achieve a certain degree of pressure filtration, making the filtration more efficient, and the impacting water flow can prevent local clogging of the filter bag. 3. In this solution, the polymerization component can cause the dosing plate to move the waste liquid closer to the middle and lower inclined platforms when the upper inclined platform rises, making it easier for the middle inclined platform to be filled with sufficient waste liquid and lifted, resulting in more accurate results during subsequent liquid spraying and testing. Attached Figure Description

[0015] Figure 1 This is a schematic elevation view of a mercury treatment device for acidic mercury-containing wastewater according to the present invention. Figure 2 This is a schematic diagram of the internal separation mechanism of the mercury treatment device for acidic mercury-containing wastewater according to the present invention before it is unfolded. Figure 3 This is a schematic diagram of the upper part of the material platform inside the glove box of the mercury treatment device for acidic mercury-containing wastewater according to the present invention. Figure 4 This is a schematic diagram of the internal separation mechanism of the mercury treatment device for acidic mercury-containing wastewater according to the present invention after unfolding. Figure 5 This is an enlarged schematic diagram of point A in this invention; Figure 6 This is an enlarged schematic diagram of point B in this invention; Figure 7 This is an enlarged schematic diagram of point C in this invention; Figure 8 This is an enlarged schematic diagram of point D in this invention; Figure 9 This is an enlarged schematic diagram of point E in this invention.

[0016] In the picture: 1. Glove box body; 2. Primary screening mechanism; 3. Mixing mechanism; 4. Separation mechanism; 5. Filter cartridge; 6. Sedimentation assembly; 7. Polymerization assembly; 8. Filtration assembly; 9. Drive unit; 10. Material platform; 11. Drive motor; 12. Wire feeder; 13. Wire hanging device; 14. Wire winding spool; 15. Upper inclined platform; 16. Middle inclined platform; 17. Lower inclined trough; 18. Telescopic box; 19. Box A; 20. Box B; 21. Box C; 22. Water inlet A; 23. Water inlet B; 24. Water inlet C 25. Stop; 26. Inner stop; 27. Opening; 28. Spring box; 29. ​​Outer stop; 30. Drain outlet; 31. Fixing frame; 32. Movable block; 33. Limiting block; 34. Dosing plate; 35. Dosing box; 36. Dosing port; 37. Control switch; 38. Thrusting beam; 39. Top box; 40. Touch rod; 41. Storage chamber; 42. Filter bag; 43. Primary screening chamber; 44. Partition; 45. Inlet pipe; 46. Dosing box; 47. Pump; 48. Feed pipe; 49. Outlet pipe. Detailed Implementation

[0017] 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.

[0018] like Figure 1-9 As shown, a mercury treatment device for acidic mercury-containing wastewater includes a glove box body 1. An observation window is provided on the surface of the glove box body 1. Inside the glove box body 1, a primary screening mechanism 2, a mixing mechanism 3 and a separation mechanism 4 are arranged in sequence at the end near the wastewater inlet. A filter cartridge 5 is provided on the outside of the glove box body 1 at the end near the wastewater outlet. The separation mechanism 4 includes a sedimentation component 6, a polymerization component 7, and a filtration component 8. The sedimentation component 6 is used for the stratification of wastewater after the initial feeding and stirring. The polymerization component 7 is used for the aggregation of wastewater towards the sedimentation component 6 and to detect whether the amount of sulfide added in the wastewater is sufficient. The filtration component 8 is used to filter out the reactants generated after the wastewater is fed.

[0019] Specifically, the sedimentation component 6 includes a drive unit 9 and a material platform 10. The drive unit 9 includes a drive motor 11, which is fixedly installed on the top of the inner wall of the glove box body 1. A wire feeder 12 is fixedly installed at the output end of the drive motor 11, and multiple strands of hanging wire 13 are wound around the surface of the wire feeder 12. The upper side of the material platform 10 is provided with an upper inclined platform 15, a middle inclined platform 16 and a lower inclined groove 17 from top to bottom. The lower end of the multi-strand suspension wire 13 passes through the winding shaft 14 and is fixedly connected to the corner of the upper surface of the upper inclined platform 15. The inner walls of the upper inclined platform 15, the middle inclined platform 16 and the lower inclined groove 17 are all provided with a slope of not less than 45 degrees. The inner side of the upper inclined platform 15, the middle inclined platform 16 and the lower inclined groove 17 is provided with a telescopic box 18. The number of middle inclined platforms 16 is not less than one, and the specific number is adapted to the size and internal height of the material platform 10.

[0020] It is understandable that the upper inclined platform 15, the middle inclined platform 16, and the lower inclined trough 17 correspond to the surface, middle, and bottom sediments of the wastewater, respectively. The traditional sampling and testing method is replaced by multi-point wide-area testing to facilitate the detection of excessive or insufficient sulfide dosage. When there is excessive sulfide, ferric chloride can be added to disrupt the colloidal stability and cause mercuric sulfide to re-aggregate from the waste liquid into filterable particles. When the sulfide dosage is insufficient, the amount of mercuric sulfide generated secondary after the addition of sulfide in the upper inclined platform 15, the middle inclined platform 16, and the lower inclined trough 17 is considered, and sulfide is replenished. The materials used in the process are stored in a compartment (not shown in the figure) on one side of the dosing tank 46. The operator can take them out from one side of the dosing tank 46 using gloves from the glove box body 1. The upper inclined platform 15 and the middle inclined platform 16 are filled with wastewater and rise in sequence. The slope set inside allows the mercuric sulfide generated to precipitate and aggregate inward for separate recovery.

[0021] The telescopic box 18 includes, from top to bottom, nested boxes A19, B20, and C21 corresponding to the upper inclined platform 15, middle inclined platform 16, and lower inclined trough 17. The lower outer walls of boxes A19, B20, and C21 are respectively provided with several water inlet troughs A22, B23, and C24. Wastewater contained in the upper inclined platform 15, middle inclined platform 16, and lower inclined trough 17 is guided through water inlet troughs A22, B23, and C24 to the corresponding boxes A19, B20, and C21, and finally discharged into filter bag 42 to collect mercury sulfide and other products. Subsequently, the wastewater and exhaust gas from the glove box body 1 are ultimately filtered by activated carbon filled in filter cartridge 5. Filter cartridge 5 is detachable and can be replaced later.

[0022] It is understandable that, such as Figure 5 and Figure 7 As shown, the upper inclined platform 15 is vertically slidably connected to the lower end of the outer wall of the box A19. The outer wall of the box A19 is provided with a stop block 25 on the upper side of the water inlet trough A22. After the upper inclined platform 15 is lifted, it is convenient to lift the box A19. Since the box A19 is lifted by the upper inclined platform 15, the water inlet trough A22 is blocked by the lower end of the upper inclined platform 15 when the upper inclined platform 15 is lifted. When the upper inclined platform 15 is in the descending state, the wastewater flows from the water inlet trough A22 to the drain outlet 30. It should be added that the surface of the box B20 is a rough surface, which makes it convenient for the water inlet trough A22 to be exposed when the upper inclined platform 15 moves down, making the device structure more stable. like Figure 5 and Figure 8 As shown, the inclined platform 16 is fixedly connected to the lower end of the outer wall of the box B20. The top of the box C21 is fixedly connected to the inner baffle 26. The position of the inner baffle 26 matches the position of the water inlet tank B23. The lower side of the inner baffle 26 is provided with an opening 27 that matches the position of the water inlet tank B23. When the box B20 descends with the upper inclined platform 15, the inner baffle 26 no longer blocks the water inlet tank B23. Wastewater enters the drain outlet 30 through the water inlet tank B23 and the opening 27. like Figure 5 and Figure 9As shown, a spring box 28 is embedded at one end of the lower inclined trough 17 near the bottom of the box C21. An outer baffle 29 is provided at the movable end of the spring box 28. The position of the outer baffle 29 matches the position of the inlet trough C24. The upper end of the outer baffle 29 is higher than the upper end of the inner wall of the inlet trough C24. A connecting drain outlet 30 is provided between the box A19, the box B20 and the box C21. When the middle inclined platform 16 is raised, the outer baffle 29 extends out from the spring box 28 and the lower end blocks the inlet trough C24. Since the upper end of the outer baffle 29 is provided with a part that exceeds the height of the inner top of the inlet trough C24, when the middle inclined platform 16 moves down, this part can contact the bottom of the middle inclined platform 16 in advance, pressing the outer baffle 29 back into the spring box 28. The exposed area of ​​the inlet trough C24 changes from small to large to small, and the wastewater enters the drain outlet 30 through the inlet trough C24.

[0023] Among them, such as Figure 3 As shown, the polymerization component 7 includes a fixed frame 31, which is fixedly connected to the inner wall of the glove box body 1 and located on the upper side of the material platform 10. Movable blocks 32 are slidably connected to the outer walls at both ends of the fixed frame 31. Limiting blocks 33 are fixed on both sides of the movable blocks 32 on the outer walls of the fixed frame 31. The limiting blocks 33 are fixed on the fixed frame 31 and are used to restrict the dosing plate 34 to move only in a designated area. The movable blocks 32 are vertically slidably connected to the inner wall of the dosing plate 34. A dosing box 35 is fixedly installed on the top of the dosing plate 34. The outer wall of the dosing plate 34 is provided with a dosing port 36 corresponding to the height of the upper inclined platform 15 and the middle inclined platform 16 after unfolding, and a control switch 37. The control switch 37 can be electronic or mechanical. When triggered, a small amount of solution is sprayed out. If a large amount of solution needs to be replenished, it can be pressed multiple times. The inner wall of the glove box body 1 is fixedly connected with a trigger rod 40 that matches the position of the control switch 37. The drive motor 11 starts and controls the upper inclined platform 15 to rise through the wire feeder 12, the hanging wire 13 and the winding spool 14. As the box body A19 is pulled up by the upper inclined platform 15, the top box 39 on the top of the box body A19 contacts the lifting beam 38. With the help of the fixing frame 31, the dosing plates 34 on both sides of the upper inclined platform 15 approach the upper inclined platform 15. Finally, after the trigger rod 40 contacts the control switch 37, a small amount of sodium sulfide (Na2S) solution is controlled to be sprayed from the dosing port 36 onto the upper inclined platform 15, the middle inclined platform 16 and the lower inclined trough 17. It is observed whether mercuric sulfide (HgS) is generated.

[0024] Specifically, a lifting beam 38 is vertically slidably connected to the upper end of the material platform 10. The height of the lifting beam 38 gradually decreases from both ends to the middle. The top of the top box 39 is a smooth arc shape. The top of the box A19 is fixedly connected to the top of the box. It should be noted that the top box 39 is set on the top of the box A19 so that the box A19 does not have to rise to a certain height before contacting the lifting beam 38. The surface of the dosing plate 34 is provided with two grooves that are adapted to the movement paths of the lifting beam 38 and the movable block 32. When the lifting beam 38 is located in the groove, only the upper end of the lifting beam 38 away from the upper inclined platform 15 contacts the groove, which makes it convenient to lift the dosing plate 34 closer to the upper inclined platform 15.

[0025] It should be added that the filter assembly 8 includes a storage chamber 41, which is located inside the material platform 10. One end of the storage chamber 41 is connected to the bottom of the drain outlet 30, and a filter bag 42 is provided at the connection between the storage chamber 41 and the drain outlet 30. When wastewater flows from the drain outlet 30 onto the surface of the filter bag 42, the drive motor 11 starts gradually when discharging wastewater. Specifically, it cycles between starting and stopping, gradually lowering the suspension line 13 and the upper inclined platform 15. This can be understood as the upper inclined platform gradually descending. The constricted spaces within platforms 15 and 16, as well as housings A19, B20, and C21, combined with the impact of the falling wastewater, gradually increase the pressure within the filter bag 42 during filtration, enabling the wastewater to achieve a certain degree of pressure filtration, resulting in more efficient filtration. Furthermore, the impacting water flow can prevent localized clogging of the filter bag 42. Additionally, a removable inspection door (not shown in the figure) is provided on the back of the glove box body 1, allowing for cleaning of the filter bag 42 or storage chamber 41.

[0026] The primary screening mechanism 2 includes a primary screening chamber 43. The inner wall of the primary screening chamber 43 is provided with several partitions 44, all of which are arranged vertically. Wastewater flow ports are provided between the top or bottom of the partitions 44 and the inner wall of the primary screening chamber 43. An inlet pipe 45 is fixedly installed on the outer wall of the glove box body 1, and one end of the inlet pipe 45 is connected to the inside of the primary screening chamber 43.

[0027] The mixing mechanism 3 includes a dosing tank 46 and a pump 47. The dosing tank 46 is fixedly installed on the top of the inner wall of the glove box body 1. The feed end of the pump 47 is connected to the primary screening chamber 43 and the discharge end of the dosing tank 46 through the feed pipe 48. The pump 47 is also connected to a tap water pipe, which can rinse the inside of the glove box body 1 when necessary. The liquid outlet pipe 49 of the pump 47 extends to the upper side of the upper inclined platform 15, so that the wastewater is poured into the middle of the material platform 10. The falling water flow can also impact the dosing plate 34, causing the dosing plate 34 to move away from the upper inclined platform 15. The control switch 37 can be disengaged from the trigger rod 40.

[0028] The present invention also provides a method for treating mercury in acidic mercury-containing wastewater, comprising the following steps: S1, pH adjustment: Referring to the laboratory wastewater storage records, add sodium bicarbonate to the wastewater and stir. After measuring and maintaining the pH value in the range of 8-10, send the pH-adjusted wastewater into the main body 1 of the glove box through the inlet pipe 45. S2, Sulfidation reaction: Pump 47 starts, draws wastewater from primary screening chamber 43, and then draws sulfides such as sodium sulfide Na2S from dosing tank 46. During the process, the drawn wastewater and sodium sulfide Na2S come into contact at the impeller of pump 47, are dispersed and stirred, and then fall from the discharge end of pump 47 into the upper side of material platform 10. S3, Wastewater stratification: After the sodium sulfide Na2S is put into contact with the mercury in the wastewater, the drive motor 11 starts and controls the upper inclined platform 15 to rise by the wire feeder 12, the suspension line 13 and the winding spool 14. The upper inclined platform 15 then makes the box B20 also rise by the contact between the box A19 and the box B20. S4. Feeding detection: As the box A19 is pulled up by the upper inclined platform 15, the top box 39 of the box A19 contacts the lifting beam 38. With the help of the fixing frame 31, the dosing plates 34 on both sides of the upper inclined platform 15 approach the upper inclined platform 15. Finally, after the touch rod 40 contacts the control switch 37, a trace amount of sodium sulfide Na2S solution is controlled to be sprinkled from the dosing port 36 onto the upper inclined platform 15, the middle inclined platform 16 and the lower inclined trough 17. It is observed whether there is still mercuric sulfide HgS generated. Then, it is controlled whether to continue to supplement sodium sulfide Na2S or ferric chloride FeCl3 to eliminate excess sulfide. S5. Wastewater Discharge: Drive motor 11 starts, gradually releasing suspension line 13. Upper inclined platform 15 loses constraint and gradually falls under the influence of gravity. During the process, as the height of upper inclined platform 15 decreases, inlet tank A22 is exposed, and wastewater in upper inclined platform 15 can pass through inlet tank A22 and enter the drain outlet 30. In middle inclined platform 16, as box B20 subsequently falls with upper inclined platform 15, inner baffle 26 no longer blocks inlet tank B23, and wastewater also enters drain outlet 30 through inlet tank B23 and opening 27. In lower inclined trough 17, as middle inclined platform 16 falls, the lower end of middle inclined platform 16 presses outer baffle 29 back into spring box 28, allowing this part of wastewater to enter drain outlet 30 through inlet tank C24. The wastewater entering drain outlet 30 is screened out by filter bag 42 to remove treated mercuric sulfide, and then discharged to filter cartridge 5, where the multi-layer activated carbon filled in filter cartridge 5 completes the final adsorption.

[0029] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted herein.

Claims

1. A mercury treatment device for acidic mercury-containing wastewater, comprising a glove box body (1), wherein an observation window is provided on the surface of the glove box body (1), characterized in that: The glove box body (1) is provided with a primary screening mechanism (2), a mixing mechanism (3) and a separation mechanism (4) arranged in sequence at one end near the wastewater inlet. The glove box body (1) is provided with a filter cartridge (5) at one end near the wastewater outlet. The separation mechanism (4) includes a sedimentation component (6), a polymerization component (7), and a filtration component (8). The sedimentation component (6) is used for the stratification of wastewater after initial feeding and stirring. The polymerization component (7) is used for the aggregation of wastewater to the sedimentation component (6) and to detect whether the amount of sulfide added in the wastewater is sufficient. The filtration component (8) is used to filter out the reactants generated after the wastewater is fed.

2. The mercury treatment device for acidic mercury-containing wastewater according to claim 1, characterized in that: The precipitation assembly (6) includes a drive unit (9) and a material platform (10). The drive unit (9) includes a drive motor (11), which is fixedly installed on the top of the inner wall of the glove box body (1). A wire feeder (12) is fixedly installed at the output end of the drive motor (11), and multiple strands of hanging wire (13) are wound around the surface of the wire feeder (12). The upper side of the material platform (10) is provided with an upper inclined platform (15), a middle inclined platform (16) and a lower inclined groove (17) from top to bottom. The lower ends of the multiple strands of the lifting wire (13) pass through the winding shaft (14) and are fixedly connected to the corner of the upper surface of the upper inclined platform (15). The inner walls of the upper inclined platform (15), the middle inclined platform (16) and the lower inclined groove (17) are all provided with a slope of not less than 45 degrees. The inner sides of the upper inclined platform (15), the middle inclined platform (16) and the lower inclined groove (17) are provided with telescopic boxes (18). The number of the middle inclined platform (16) is not less than one.

3. The mercury treatment device for acidic mercury-containing wastewater according to claim 2, characterized in that: The telescopic box (18) includes, from top to bottom, box bodies A (19), B (20), and C (21) nested together, corresponding to the upper inclined platform (15), middle inclined platform (16), and lower inclined groove (17). The lower ends of the outer walls of box bodies A (19), B (20), and C (21) are respectively provided with a number of water inlet grooves A (22), B (23), and C (24).

4. The mercury treatment device for acidic mercury-containing wastewater according to claim 3, characterized in that: The upper inclined platform (15) is vertically slidably connected to the lower end of the outer wall of the box A (19). A stop (25) is provided on the upper side of the water inlet trough A (22) on the outer wall of the box A (19). The middle inclined platform (16) is fixedly connected to the lower end of the outer wall of the box B (20). An inner stop (26) is fixedly connected to the top of the box C (21). The position of the inner stop (26) matches the position of the water inlet trough B (23). The lower side of the inner stop (26) is provided with a position that matches the position of the water inlet trough B (23). The matching opening (27) has a spring box (28) buried at one end of the lower inclined groove (17) near the bottom of the box body C (21). The movable end of the spring box (28) is provided with an outer baffle (29). The position of the outer baffle (29) matches the position of the water inlet groove C (24). The upper end of the outer baffle (29) is higher than the upper end of the inner wall of the water inlet groove C (24). A connected drain outlet (30) is provided between the box body A (19), the box body B (20) and the box body C (21).

5. The mercury treatment device for acidic mercury-containing wastewater according to claim 4, characterized in that: The polymerization component (7) includes a fixed frame (31), which is fixedly connected to the inner wall of the glove box body (1) and located on the upper side of the material platform (10). Movable blocks (32) are slidably connected to the outer walls at both ends of the fixed frame (31). Limiting blocks (33) are provided on both sides of the movable blocks (32) on the outer walls of the fixed frame (31). The movable blocks (32) are vertically slidably connected to the inner wall of the dosing plate (34). A dosing box (35) is fixedly installed on the top of the dosing plate (34). The outer wall of the dosing plate (34) is provided with a dosing port (36) and a control switch (37) corresponding to the height of the upper inclined platform (15) and the middle inclined platform (16) after unfolding. A trigger rod (40) matching the position of the control switch (37) is fixedly connected to the inner wall of the glove box body (1).

6. The mercury treatment device for acidic mercury-containing wastewater according to claim 5, characterized in that: The upper end of the material platform (10) is vertically slidably connected to a lifting beam (38). The height of both ends of the lifting beam (38) gradually decreases towards the middle. The top of the top box (39) is a smooth arc shape. The top of the box body A (19) is fixedly connected to the top box (39).

7. The mercury treatment device for acidic mercury-containing wastewater according to claim 6, characterized in that: The filter assembly (8) includes a storage cavity (41) which is located inside the material platform (10). One end of the storage cavity (41) is connected to the bottom of the drain outlet (30). A filter bag (42) is provided at the connection between the storage cavity (41) and the drain outlet (30).

8. The mercury treatment device for acidic mercury-containing wastewater according to claim 7, characterized in that: The primary screening mechanism (2) includes a primary screening chamber (43). The inner wall of the primary screening chamber (43) is provided with several partitions (44). Wastewater flow ports are provided between the top or bottom of the partitions (44) and the inner wall of the primary screening chamber (43). An inlet pipe (45) is fixedly installed on the outer wall of the glove box body (1). One end of the inlet pipe (45) is connected to the inside of the primary screening chamber (43).

9. A mercury treatment device for acidic mercury-containing wastewater according to claim 8, characterized in that: The mixing mechanism (3) includes a drug delivery box (46) and a pump (47). The drug delivery box (46) is fixedly installed on the top of the inner wall of the glove box body (1). The feed end of the pump (47) is connected to the primary screening chamber (43) and the discharge end of the drug delivery box (46) through the feed pipe (48). The liquid outlet pipe (49) of the pump (47) extends to the upper side of the upper inclined platform (15).

10. A method for treating mercury in acidic mercury-containing wastewater, characterized in that, Includes the following steps: S1, pH adjustment: Refer to the laboratory wastewater storage record, add sodium bicarbonate to the wastewater and stir. After the pH value is maintained in the range of 8-10, send the pH-adjusted wastewater into the main body (1) of the glove box through the inlet pipe (45). S2, Sulfide reaction: The pump (47) is started, and wastewater is drawn from the primary screening chamber (43). Sulfides such as sodium sulfide Na2S are drawn from the dosing tank (46). During the process, the drawn wastewater and sodium sulfide Na2S come into contact at the impeller of the pump (47), and after being dispersed and stirred, they fall from the discharge end of the pump (47) into the upper side of the material platform (10). S3, Wastewater stratification: After the sodium sulfide Na2S is put into contact with the mercury in the wastewater, the drive motor (11) is started. The upper inclined platform (15) is controlled to rise by the wire feeder (12), the suspension line (13) and the winding spool (14). The upper inclined platform (15) then rises by the contact between the box A (19) and the box B (20). The box B (20) is also filled with wastewater and rises. S4. Feeding detection: As the box A (19) is pulled up by the upper inclined platform (15), the top box (39) at the top of the box A (19) contacts the lifting beam (38), and with the help of the fixing frame (31), the dosing plates (34) on both sides of the upper inclined platform (15) approach the upper inclined platform (15). Finally, after the touch rod (40) contacts the control switch (37), the trace amount of sodium sulfide Na2S solution is controlled to be sprinkled from the dosing port (36) onto the upper inclined platform (15), the middle inclined platform (16) and the lower inclined trough (17). It is observed whether there is still mercuric sulfide HgS generated, and then it is controlled whether to continue to supplement sodium sulfide Na2S or ferric chloride FeCl3 to eliminate excess sulfide. S5. Wastewater discharge: The drive motor (11) starts and gradually releases the suspension line (13). The upper inclined platform (15) loses its constraint and gradually falls under the influence of gravity. During the process, as the height of the upper inclined platform (15) decreases, the water inlet tank A (22) is exposed, and the wastewater in the upper inclined platform (15) can pass through the water inlet tank A (22) and enter the drain outlet (30). In the middle inclined platform (16), when the box body B (20) subsequently falls with the upper inclined platform (15), the inner baffle (26) no longer blocks the water inlet tank B (23). Wastewater enters the drain outlet (30) through the inlet tank (23) and the opening (27) into the lower inclined tank (17). When the middle inclined platform (16) falls, the lower end of the middle inclined platform (16) presses the outer baffle (29) back into the spring box (28), so that this part of the wastewater enters the drain outlet (30) through the inlet tank (24). The wastewater entering the drain outlet (30) is screened out by the filter bag (42) after treatment of mercuric sulfide, and then discharged to the filter cartridge (5). The multi-layer activated carbon filled in the filter cartridge (5) completes the final adsorption.

Images