Water pollution detection equipment for lithium extraction waste salt treatment and solid waste recycling method

Abstract

The invention provides water pollution detection equipment for lithium extraction waste salt treatment and a solid waste recycling method, and relates to the technical field of water pollution detection, the water pollution detection equipment comprises a mounting rack, an adjusting mechanism, a detection treatment mechanism, a detection mechanism and a moving mechanism; the adjusting mechanism comprises a rotating seat, a sample cup and an adjusting gear, the inner side of the rotating seat is rotatably connected with a rotating rod, and the front end of the rotating rod is fixedly connected with the sample cup. According to the scheme, acidic PH adjusting liquid is added into the sample cup through the liquid inlet pipe, filtrate is adjusted to a fixed PH value and then detected, so that the accuracy of detection data is effectively improved, the sample cup is shaken left and right through cooperation of an adjusting gear and a swing toothed plate, the mixing efficiency of the acidic PH adjusting liquid and the filtrate is improved, and the detection accuracy is improved. By adding the acidic pH adjusting liquid, the EDTA complex is digested and destroyed, metal ions are ensured to be completely free, and the efficiency and effect of subsequent suspended matter and heavy metal detection are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water pollution detection, and in particular to a water pollution detection device for lithium extraction waste salt treatment and a solid waste resource recovery method. Background Art

[0002] The waste salt produced as a by-product of the lithium extraction process is usually classified as hazardous waste. It contains harmful impurities such as fluoride and heavy metals. Traditional landfill treatment is costly, occupies land, and poses an environmental pollution risk. By recycling the waste salt from lithium extraction to prepare potassium tetraphenylborate and thenardite, the problem of hazardous solid waste disposal can be solved and significant economic benefits can be created. Strict water pollution testing during the recycling process can prevent impurities in the wastewater from mixing into the product during the subsequent crystallization process, affecting the purity of potassium tetraphenylborate or thenardite, and preventing toxic and harmful substances from entering the water environment, causing pollutants to damage the aquatic ecological environment.

[0003] In related technologies, when recycling waste salt from lithium extraction, the pH of the waste salt filtrate needs to be adjusted to neutral. However, some existing water pollution detection equipment is inconvenient to adjust the pH of the waste salt filtrate before testing. The degree of dissociation of EDTA complexes varies under different pH conditions, and the pH of the filtrate needs to be adjusted to be consistent when testing water pollution. Otherwise, it will interfere with the test and affect the accuracy of the test data. In addition, if strong acid is not used to digest and destroy the EDTA complex, the complete release of metal ions cannot be ensured, resulting in poor suspended matter detection results.

[0004] Therefore, it is necessary to provide a water pollution detection device for lithium extraction waste salt treatment and a solid waste resource recovery method to solve the above technical problems. Summary of the Invention

[0005] The present invention provides a water pollution detection device for lithium extraction waste salt treatment and a solid waste resource recovery method, which solves the technical problem in the related art that when water pollution detection equipment detects waste salt filtrate, it is inconvenient to adjust the pH value of the filtrate before performing the detection.

[0006] In order to solve the above technical problems, the present invention provides a water pollution detection device for lithium extraction waste salt treatment, which includes a mounting frame, an adjustment mechanism, a detection and processing mechanism, a detection mechanism and a moving mechanism;

[0007] The adjustment mechanism includes a rotating seat, a sample cup and an adjustment gear, the inner side of the rotating seat is rotatably connected to a rotating rod, the front end of the rotating rod is fixedly connected to the sample cup, and the rear end of the rotating rod is fixedly connected to the adjustment gear, the front side of the mounting frame is fixedly provided with a slide rail, the rotating seat is slidably connected to the slide rail, the inner side of the mounting frame is slidably connected to a swinging gear plate, the back side of the swinging gear plate is fixedly provided with a spring, and the top of the mounting frame is provided with a liquid inlet pipe;

[0008] The detection and processing mechanism includes a funnel, a collection cup, and a sliding tooth plate. The bottom of the funnel is arranged on the inner side of the top of the collection cup. A filter membrane is arranged on the inner side of the funnel. A mounting bracket is fixed on the front side of the mounting frame. The collection cup is clamped on the inner side of the mounting bracket.

[0009] The detection mechanism is arranged at the top of the left side of the mounting frame and is used to detect the pH value of the filtrate;

[0010] The moving mechanism is arranged on the front side of the mounting frame and is used for adjusting the position of the sample cup left and right.

[0011] Preferably, the sliding tooth plate is slidably connected to the inner side of the mounting frame, a first electric push rod is fixedly provided on the top of the inner side of the mounting frame, and an output end of the first electric push rod is fixedly connected to the sliding tooth plate.

[0012] Preferably, the moving mechanism includes two pulleys rotatably connected to the front side of the mounting frame, the surfaces of the two pulleys are provided with belts, the belts are fixedly connected to the rotating seat, and a driving motor for driving the pulleys to rotate is provided on the left side of the back side of the mounting frame.

[0013] Preferably, the inner side of the mounting bracket is rotatably connected to a negative pressure suction mechanism, and the negative pressure suction mechanism includes a transmission gear group rotatably connected to the inner side of the mounting bracket, a gear group is fixedly provided on the back side of the sliding gear plate, and the inner side of the mounting bracket is rotatably connected to a transmission gear through a rotating shaft, and two first brackets are fixedly provided on the top of the inner side of the mounting bracket, and an exhaust pipe is fixedly provided on the inner side of the two first brackets, and a first piston and a piston rod are slidably connected to the inner side of the exhaust pipe, and the right end of the piston rod is fixedly connected to the left side of the first piston, and a transmission tooth is fixed on the surface of the piston rod, and the transmission tooth is meshed with the transmission gear, and the exhaust pipe is connected to the collection cup through a hose.

[0014] Preferably, a cleaning mechanism is fixedly provided on the inner side of the top of the mounting frame, and the cleaning mechanism includes two second brackets fixedly provided on the inner side of the top of the mounting frame, and a cleaning cylinder is fixedly provided on the inner side of the two second brackets, and a second piston is slidably connected to the inner side of the cleaning cylinder, and the left end of the piston rod is fixedly connected to the second piston. A fixed bracket is provided on the top of the left side of the mounting frame, and a water outlet pipe is provided on the inner side of the fixed bracket, and a plurality of nozzles are connected to the surface of the water outlet pipe, and the cleaning cylinder is connected to the water outlet pipe through a hose.

[0015] Preferably, the detection mechanism includes a detection frame fixedly mounted on the left side of the top of the mounting frame, a second electric push rod is arranged on the inner side of the detection frame, a connecting bracket is fixedly mounted on the output end of the second electric push rod, a rotating shaft is rotatably connected to the inner side of the connecting bracket, a detection bracket is fixedly mounted on the front side of the rotating shaft, a pH detection sensor is arranged on the inner side of the detection bracket, and the fixed bracket is fixedly connected to the detection frame.

[0016] Preferably, a flipping mechanism is fixedly provided on the back of the detection frame, and the flipping mechanism includes two tracks fixedly provided on the back of the detection frame, the surfaces of the two tracks are slidably connected with sliding seats, the backs of the two sliding seats are fixedly connected to the connecting bracket, the surface of the rotating shaft is fixedly provided with a flipping gear, and the back of the detection frame is fixedly provided with a flipping gear plate.

[0017] Preferably, an LED light group is provided on the left side of the mounting frame, two adjusting screws are threadedly connected to the inner sides of both sides of the mounting frame, support seats are fixed to the bottoms of the four adjusting screws, a placement rack is fixed to the top of the mounting frame, and the peripheral side surface of the liquid inlet pipe is fixedly connected to the placement rack.

[0018] A method for recycling lithium-extracted waste salt into solid waste resources comprises the following steps:

[0019] Step S1, waste salt pretreatment:

[0020] S11, dissolution: Mix the waste salt with water in a mass ratio of 1:3-5, heat to 60-80°C, and stir until completely dissolved;

[0021] S12, impurity removal: add 0.1-0.5% EDTA solution to complex calcium and magnesium ions, adjust the pH to 6-7, and filter to remove insoluble matter such as silicon and aluminum;

[0022] Step S2, Glauber's salt crystallization:

[0023] S21, Concentration: Evaporate the filtrate to a density of 1.25-1.30 g / cm 3 , cooled to 10-20℃, and glauberite crystals were precipitated;

[0024] S22, separation: centrifugation to separate crystals, and the mother liquor enters the sodium enrichment stage;

[0025] Step S3, synthesis of potassium tetraphenylborate:

[0026] Mix glauberite and sodium tetraphenylborate in a molar ratio of 1:1.05-1.1, and stir the mixture at a pH of 7-9 and a temperature of 25-40°C for 1-2 hours to generate a potassium tetraphenylborate precipitate;

[0027] Step S4, sodium enrichment and thenardite crystallization:

[0028] S41, concentration: evaporating the mother liquor after the reaction to a sodium sulfate concentration of ≥ 20%, cooling to 0-5°C to precipitate the sodium sulfate;

[0029] S42. Dehydration: After the mirabilite is centrifuged and dried, anhydrous sodium sulfate is obtained.

[0030] Compared with related technologies, the water pollution detection equipment for lithium extraction waste salt treatment and the solid waste resource recovery method provided by the present invention have the following beneficial effects:

[0031] Acidic pH adjusting liquid is added to the sample cup through the liquid inlet tube, and the filtrate is adjusted to a fixed pH value before testing, thereby effectively improving the accuracy of the test data. By adjusting the coordination between the gear and the swinging tooth plate, the sample cup is shaken left and right, thereby improving the mixing efficiency of the acidic pH adjusting liquid and the filtrate and shortening the filtrate testing time. By adding acidic pH adjusting liquid, the EDTA complex is digested and destroyed, ensuring that the metal ions are completely free, improving the efficiency and effect of subsequent suspended matter and heavy metal testing, avoiding the problem of low free ion concentration test values ​​in the filtrate and high actual residual risks, and improving the accuracy of water pollution detection data;

[0032] By moving the sliding tooth plate to the left, the adjusting gear drives the sample cup to rotate through the rotating rod, and the filtrate in the sample cup is poured into the funnel. The suspended matter and particulate matter in the filtrate are filtered through the filter membrane to prevent subsequent particulate matter from clogging the detection instrument or causing a decrease in atomization efficiency in AAS detection, affecting data repeatability. The concentration of suspended particulate matter in the filtrate is detected by collecting and weighing the particulate matter on the top of the filter membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0034] Figure 1 The best structural diagram provided by the present invention;

[0035] Figure 2 A schematic diagram of the rear view of the mounting bracket provided by the present invention;

[0036] Figure 3 A schematic structural diagram of the adjustment mechanism and the moving mechanism provided by the present invention;

[0037] Figure 4 for Figure 3 A schematic structural diagram of a rear view of the mounting frame shown;

[0038] Figure 5 A schematic diagram of the state in which the adjusting gear provided by the present invention moves to the right and contacts the swinging gear plate, and the sampling cup is driven to rotate by the rotating rod;

[0039] Figure 6 A schematic diagram of the structure of the detection and processing mechanism provided by the present invention;

[0040] Figure 7 for Figure 6 A schematic structural diagram of a rear view of the mounting frame shown;

[0041] Figure 8 A schematic diagram of the state in which the first electric push rod provided by the present invention extends to drive the sliding tooth plate to move leftward, and drives the sample cup to rotate through the adjustment gear and the rotating rod;

[0042] Figure 9 A schematic structural diagram of the negative pressure suction mechanism and cleaning mechanism provided by the present invention;

[0043] Figure 10 for Figure 9 The schematic diagram shows a state in which the sliding tooth plate drives the tooth group to move leftward, and drives the piston rod to move leftward through the transmission tooth group, transmission gear and transmission teeth;

[0044] Figure 11 A schematic structural diagram of the detection mechanism provided by the present invention;

[0045] Figure 12 for Figure 11 The schematic diagram of the structure of the rear view of the detection frame shown;

[0046] Figure 13 for Figure 12 The enlarged structural diagram of point A is shown;

[0047] Figure 14 A schematic diagram of a state in which the second electric push rod provided by the present invention drives the connecting bracket to move upward, the flip gear contacts the flip gear plate, and the pH detection sensor is driven to rotate clockwise via the rotating shaft;

[0048] Figure 15 This is a flow chart of the solid waste resource utilization method provided by the present invention.

[0049] Description of Figure Numbers:

[0050] 1. Mounting frame;

[0051] 2. Adjustment mechanism; 21. Rotating seat; 22. Sample cup; 23. Adjustment gear; 24. Rotating rod; 25. Slide rail; 26. Swinging gear plate; 27. Spring; 28. Liquid inlet pipe;

[0052] 3. Detection and processing mechanism; 31. Funnel; 32. Collection cup; 33. Sliding tooth plate; 34. Filter membrane; 35. Mounting bracket; 36. First electric push rod;

[0053] 4. Detection mechanism; 41. Detection frame; 42. Second electric push rod; 43. Connecting bracket; 44. Rotating shaft; 45. Detection bracket; 46. pH detection sensor;

[0054] 5. Moving mechanism; 51. Pulley; 52. Belt; 53. Driving motor;

[0055] 6. Negative pressure suction mechanism; 61. Transmission gear set; 62. Gear set; 63. Transmission gear; 64. First bracket; 65. Exhaust pipe; 66. First piston; 67. Piston rod; 68. Transmission gear;

[0056] 7. Cleaning mechanism; 71. Second bracket; 72. Cleaning cylinder; 73. Second piston; 74. Fixed bracket; 75. Water outlet pipe; 76. Spray nozzle;

[0057] 8. Flipping mechanism; 81. Track; 82. Sliding seat; 83. Flipping gear; 84. Flipping gear plate;

[0058] 9. LED light assembly; 10. Adjustment screw; 11. Support base; 12. Placement rack.

[0059] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0060] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0061] The present invention provides a water pollution detection device for lithium extraction waste salt treatment and a solid waste resource recovery method.

[0062] First embodiment:

[0063] See also Figures 1 to 8 , a water pollution detection device for lithium extraction waste salt treatment, comprising a mounting frame 1, an adjustment mechanism 2, a detection and processing mechanism 3, a detection mechanism 4 and a moving mechanism 5;

[0064] The adjustment mechanism 2 includes a rotating seat 21, a sample cup 22 and an adjustment gear 23. The inner side of the rotating seat 21 is rotatably connected to a rotating rod 24. The front end of the rotating rod 24 is fixedly connected to the sample cup 22, and the rear end of the rotating rod 24 is fixedly connected to the adjustment gear 23. A slide rail 25 is fixedly provided on the front of the mounting frame 1. The rotating seat 21 is slidably connected to the slide rail 25. A swinging tooth plate 26 is slidably connected to the inner side of the mounting frame 1. A spring 27 is fixedly provided on the back of the swinging tooth plate 26. A liquid inlet pipe 28 is provided on the top of the mounting frame 1.

[0065] Please combine Figure 5 : Start the drive motor 53, the drive motor 53 rotates to drive the two pulleys 51 to rotate, the two pulleys 51 rotate and drive the rotating base 21 to slide to the right on the surface of the slide rail 25 through the belt 52. When the rotating base 21 moves, it drives the sample cup 22 and the adjusting gear 23 to move to the right. When the sample cup 22 moves to the bottom of the liquid inlet pipe 28, the acidic pH regulating liquid is added to the sample cup 22 through the liquid inlet pipe 28 to adjust the filtrate to a fixed pH value, and the sample cup 22 is sealed with a sealing cover. When the regulating gear 23 moves to the right and contacts the swinging gear plate 26, the drive motor 53 is controlled to rotate forward and reverse, so that the regulating gear 23 drives the sample cup 22 to shake through the rotating rod 24, thereby quickly mixing the acidic pH regulating liquid and the filtrate;

[0066] Furthermore, before adjusting the pH value of the filtrate, the pH value of the filtrate is pre-detected by the detection mechanism 4, and then the acidic pH regulating liquid is quantitatively added according to the detection result, which can improve the adjustment efficiency of the pH value of the filtrate. After the acidic pH regulating liquid is mixed with the filtrate, the pH value of the filtrate is detected again by the detection mechanism 4, thereby ensuring that the pH value of the filtrate is at a uniform standard;

[0067] The detection and processing mechanism 3 includes a funnel 31, a collection cup 32, and a sliding tooth plate 33. The bottom of the funnel 31 is arranged on the inner side of the top of the collection cup 32. A filter membrane 34 is arranged on the inner side of the funnel 31. A mounting bracket 35 is fixed to the front side of the mounting frame 1. The collection cup 32 is clamped on the inner side of the mounting bracket 35.

[0068] The sliding tooth plate 33 is slidably connected to the inner side of the mounting frame 1 , and a first electric push rod 36 is fixedly provided on the top of the inner side of the mounting frame 1 , and the output end of the first electric push rod 36 is fixedly connected to the sliding tooth plate 33 ;

[0069] Please combine Figure 8: The sample cup 22 is adjusted to the left side of the top of the funnel 31 by the moving mechanism 5, and the sealing cover is removed. Then, the first electric push rod 36 is started. The first electric push rod 36 extends and drives the sliding tooth plate 33 to slide to the left on the inner side of the mounting frame 1. When the sliding tooth plate 33 contacts the adjusting gear 23, the adjusting gear 23 drives the sample cup 22 to rotate clockwise through the rotating rod 24, so that the filtrate in the sample cup 22 flows into the funnel 31, and the filtrate is filtered by the filter membrane 34. The filtered filtrate enters the collection cup 32 and is collected through a pipe connected to the bottom of the collection cup 32;

[0070] Preferably, the filter membrane 34 is a detachable structure. After the filter membrane 34 is removed, the particulate matter on the top of the filter membrane 34 is collected and weighed to detect the concentration of suspended particles in the filtrate. A one-way valve is provided at the bottom of the collection cup 32.

[0071] Furthermore, after all the filtrate in the sample cup 22 is poured into the funnel 31, the funnel 31 is sealed by a sealing cover;

[0072] The detection mechanism 4 is provided at the top of the left side of the mounting frame 1 and is used to detect the pH value of the filtrate;

[0073] The moving mechanism 5 is provided at the front side of the mounting frame 1 and is used to adjust the position of the sample cup 22 left and right.

[0074] The moving mechanism 5 includes two pulleys 51 rotatably connected to the front side of the mounting frame 1. Belts 52 are sleeved on the surfaces of the two pulleys 51. The belts 52 are fixedly connected to the rotating base 21. A driving motor 53 for driving the pulleys 51 to rotate is provided on the left side of the back side of the mounting frame 1.

[0075] Please combine Figure 3 and Figure 4 : Start the driving motor 53, the driving motor 53 rotates to drive the left pulley 51 to rotate, the left pulley 51 rotates and drives the right pulley 51 to rotate through the belt 52, and the rotating seat 21 is driven to move by the belt 52 through the rotation of the two pulleys 51.

[0076] In this embodiment, unlike existing water pollution detection equipment, this equipment adds an acidic pH regulating liquid into the sample cup 22 through the liquid inlet pipe 28, adjusts the filtrate to a fixed pH value, and then performs the test, thereby effectively improving the accuracy of the test data. By adjusting the gear 23 and the swinging gear plate 26, the sample cup 22 is shaken left and right, thereby improving the mixing efficiency of the acidic pH regulating liquid and the filtrate and shortening the filtrate detection time. By adding the acidic pH regulating liquid, the EDTA complex is digested and destroyed, ensuring that the metal ions are completely free, thereby improving the efficiency and effectiveness of subsequent suspended matter and heavy metal detection, avoiding the problem of low free ion concentration detection value in the filtrate and high actual residual risk, and improving the accuracy of water pollution detection data;

[0077] By moving the sliding tooth plate 33 to the left, the adjusting gear 23 drives the sample cup 22 to rotate through the rotating rod 24, and the filtrate in the sample cup 22 is poured into the funnel 31. The suspended matter and particulate matter in the filtrate are filtered through the filter membrane 34 to prevent subsequent particulate matter from clogging the detection instrument or causing a decrease in atomization efficiency during AAS detection, affecting data repeatability. The concentration of suspended particulate matter in the filtrate is detected by collecting and weighing the particulate matter on the top of the filter membrane 34.

[0078] Second embodiment:

[0079] See also Figure 7 、 Figures 9 to 11 , the inner side of the mounting frame 1 is rotatably connected to a negative pressure suction mechanism 6, and the negative pressure suction mechanism 6 includes a transmission gear set 61 rotatably connected to the inner side of the mounting frame 1, and a gear set 62 is fixed on the back side of the sliding gear plate 33. The inner side of the mounting frame 1 is rotatably connected to a transmission gear 63 through a rotating shaft, and two first brackets 64 are fixed on the top of the inner side of the mounting frame 1. An exhaust pipe 65 is fixed on the inner side of the two first brackets 64, and a first piston 66 and a piston rod 67 are slidably connected to the inner side of the exhaust pipe 65. The right end of the piston rod 67 is fixedly connected to the left side of the first piston 66, and a transmission tooth 68 is fixed on the surface of the piston rod 67. The transmission tooth 68 is meshed with the transmission gear 63, and the exhaust pipe 65 is connected to the collection cup 32 through a hose;

[0080] Please combine Figure 9 and Figure 10: When all the filtrate in the sample cup 22 is poured into the funnel 31 and the funnel 31 is sealed by the sealing cover, the sliding tooth plate 33 is continuously driven to move to the left by the first electric push rod 36. When the sliding tooth plate 33 is out of contact with the adjusting gear 23, the sample cup 22 is kept in a tilted state, and the tooth group 62 is engaged with the transmission tooth group 61 under the movement of the sliding tooth plate 33, and the transmission gear 63 is driven to rotate by the transmission gear group 61. The rotation of the transmission gear 63 drives the transmission teeth 68 and the piston rod 67 to move to the left. The movement of the piston rod 67 drives the first piston 66 to slide to the left in the exhaust pipe 65, so that the gas in the collection cup 32 is extracted by the hose, so that a negative pressure is formed in the collection cup 32, thereby improving the filtration efficiency of the filtrate;

[0081] A cleaning mechanism 7 is fixedly provided on the inner side of the top of the mounting frame 1. The cleaning mechanism 7 includes two second brackets 71 fixedly provided on the inner side of the top of the mounting frame 1. A cleaning cylinder 72 is fixedly provided on the inner side of the two second brackets 71. A second piston 73 is slidably connected to the inner side of the cleaning cylinder 72. The left end of the piston rod 67 is fixedly connected to the second piston 73. A fixed bracket 74 is provided on the top of the left side of the mounting frame 1. A water outlet pipe 75 is provided on the inner side of the fixed bracket 74. A plurality of nozzles 76 are connected to the surface of the water outlet pipe 75. The cleaning cylinder 72 is connected to the water outlet pipe 75 through a hose.

[0082] Please combine Figures 9 to 11 When the transmission gear 63 drives the piston rod 67 to move leftward through the transmission teeth 68, the movement of the piston rod 67 drives the second piston 73 to slide leftward inside the cleaning cylinder 72, thereby transporting the cleaning liquid in the outlet pipe 75 through the hose into the outlet pipe 75 and spraying it through the nozzle 76, thereby cleaning the detection end of the pH detection sensor 46;

[0083] Preferably, the surface of the cleaning cylinder 72 is connected to a hose and a water suction pipe, and the surfaces of the hose and the water suction pipe are both provided with a one-way valve.

[0084] In this embodiment, when the first electric push rod 36 continuously drives the sliding tooth plate 33 to move to the left, the sliding tooth plate 33 drives the transmission tooth group 61 to rotate through the tooth group 62, and the transmission tooth group 61 drives the piston rod 67 to move to the left through the transmission gear 63 and the transmission teeth 68, so that the first piston 66 slides to the left in the exhaust pipe 65, thereby using the hose to extract the gas in the collection cup 32, and forming a negative pressure in the collection cup 32, thereby shortening the filtration time of the filtrate and improving the filtration efficiency of the filtrate. The leftward movement of the piston rod 67 will drive the second piston 73 to slide to the left on the inner side of the cleaning cylinder 72, and the cleaning liquid will be transported to the water outlet pipe 75 through the hose and sprayed out through the nozzle 76, thereby cleaning the detection end of the pH detection sensor 46 to avoid cross infection.

[0085] Third embodiment:

[0086] See also Figure 1 、 Figures 11 to 14 The detection mechanism 4 includes a detection frame 41 fixed to the left side of the top of the mounting frame 1, a second electric push rod 42 is provided on the inner side of the detection frame 41, and a connecting bracket 43 is fixed on the output end of the second electric push rod 42. The inner side of the connecting bracket 43 is rotatably connected to a rotating shaft 44, and a detection bracket 45 is fixed on the front side of the rotating shaft 44. A pH detection sensor 46 is provided on the inner side of the detection bracket 45, and the fixed bracket 74 is fixedly connected to the detection frame 41;

[0087] Please combine Figure 1 and Figure 11 : Start the second electric push rod 42, the second electric push rod 42 extends downward to drive the connecting bracket 43 to move downward, and the connecting bracket 43 drives the detection bracket 45 and the pH detection sensor 46 to move downward through the rotating shaft 44, so that the bottom end of the pH detection sensor 46 is inserted into the sample cup 22, thereby performing pH detection on the filtrate in the sample cup 22.

[0088] A flip mechanism 8 is fixedly provided on the back of the detection frame 41. The flip mechanism 8 includes two rails 81 fixedly provided on the back of the detection frame 41. The surfaces of the two rails 81 are slidably connected to sliding seats 82. The backs of the two sliding seats 82 are fixedly connected to the connecting bracket 43. A flip gear 83 is fixedly provided on the surface of the rotating shaft 44. A flip gear plate 84 is fixedly provided on the back of the detection frame 41.

[0089] Please combine Figure 12 and Figure 13 : Start the second electric push rod 42, which drives the pH detection sensor 46 to move upward through the connecting bracket 43, the rotating shaft 44 and the detection bracket 45. During the movement of the rotating shaft 44, the flip gear 83 is simultaneously driven to move upward. When the flip gear 83 contacts the flip gear plate 84, the flip gear 83 drives the detection bracket 45 and the pH detection sensor 46 to rotate clockwise through the rotating shaft 44, thereby facilitating the nozzle 76 to clean the detection end of the pH detection sensor 46;

[0090] Furthermore, the second electric push rod 42 is started, and the second electric push rod 42 drives the PH detection sensor 46 to move downward through the connecting bracket 43, the rotating shaft 44 and the detection bracket 45. With the cooperation of the flip gear 83 and the flip gear plate 84, the rotating shaft 44 drives the detection bracket 45 and the PH detection sensor 46 to rotate counterclockwise, thereby resetting the position of the PH detection sensor 46.

[0091] An LED lamp group 9 is provided on the left side of the mounting frame 1. Two adjusting screws 10 are threadedly connected to the inner sides of both sides of the mounting frame 1. The bottoms of the four adjusting screws 10 are fixed with support seats 11. A placement frame 12 is fixed on the top of the mounting frame 1. The peripheral side of the liquid inlet pipe 28 is fixedly connected to the placement frame 12.

[0092] Preferably, the turbidity of the filtrate is preliminarily detected by setting an LED light group 9, and the use height of the mounting bracket 1 can be adjusted by rotating the adjusting screw 10.

[0093] In this embodiment, the second electric push rod 42 extends downward to drive the connecting bracket 43 to move downward, and the connecting bracket 43 drives the detection bracket 45 and the pH detection sensor 46 to move downward through the rotating shaft 44, so that the pH value of the filtrate is detected by the pH detection sensor 46, and when the second electric push rod 42 retracts upward, it will simultaneously drive the rotating shaft 44, the pH detection sensor 46 and the flip gear 83 to move upward. When the flip gear 83 contacts the flip gear plate 84, the flip gear 83 will drive the detection bracket 45 and the pH detection sensor 46 to rotate clockwise through the rotating shaft 44, thereby facilitating the nozzle 76 to clean the detection end of the pH detection sensor 46, thereby improving the cleaning effect of the pH detection sensor 46.

[0094] Fourth embodiment:

[0095] See also Figure 15 A method for recycling waste salt from lithium extraction into solid waste resources comprises the following steps:

[0096] Step S1, waste salt pretreatment:

[0097] S11, dissolution: Mix the waste salt with water in a mass ratio of 1:3-5, heat to 60-80°C, and stir until completely dissolved;

[0098] S12, impurity removal: add 0.1-0.5% EDTA solution to complex calcium and magnesium ions, adjust the pH to 6-7, and filter to remove insoluble matter such as silicon and aluminum;

[0099] Step S2, Glauber's salt crystallization:

[0100] S21, Concentration: Evaporate the filtrate to a density of 1.25-1.30 g / cm 3 , cooled to 10-20℃, and glauberite crystals were precipitated;

[0101] S22, separation: centrifugation to separate crystals, and the mother liquor enters the sodium enrichment stage;

[0102] Step S3, synthesis of potassium tetraphenylborate:

[0103] Mix glauberite and sodium tetraphenylborate in a molar ratio of 1:1.05-1.1, and stir the mixture at a pH of 7-9 and a temperature of 25-40°C for 1-2 hours to generate a potassium tetraphenylborate precipitate;

[0104] Step S4, sodium enrichment and thenardite crystallization:

[0105] S41, concentration: evaporating the mother liquor after the reaction to a sodium sulfate concentration of ≥ 20%, cooling to 0-5°C to precipitate the sodium sulfate;

[0106] S42. Dehydration: After the mirabilite is centrifuged and dried, anhydrous sodium sulfate is obtained.

[0107] In this embodiment, the K in sodium tetraphenylborate and potassium glauberite + A specific precipitation reaction occurs to selectively generate potassium tetraphenylborate, which has a much lower solubility than sodium salt, achieving efficient and directional conversion of potassium. Potassium tetraphenylborate has a purity of ≥98% and can be directly sold as an electronic material or analytical reagent. Its economic value is 5-10 times higher than that of traditional potassium sulfate products.

[0108] In the pretreatment stage, EDTA complexation and pH adjustment combined technology is used to remove impurities such as calcium, aluminum, and silicon to prevent them from forming co-precipitations during the crystallization process. The sodium-enriched mother liquor is reused in the sodium sulfate crystallization process, forming a closed-loop cycle, reducing the consumption of fresh water and chemicals, and lowering overall costs.

[0109] Converting sulfate ions in waste salt into industrial-grade Glauber's salt avoids soil compaction and water pollution caused by direct sulfate discharge, complies with the requirements of the Law on the Prevention and Control of Environmental Pollution by Solid Waste, and ultimately reduces the amount of solid waste discharged, achieving the green production goal of treating waste with waste.

[0110] Please refer to the Figures 1 to 15 The working principles of the water pollution detection equipment for lithium extraction waste salt treatment and the solid waste resource recovery method provided by the present invention are as follows:

[0111] Step S1: Pour the sampled filtrate into the sample cup 22 in a fixed amount. Then, the second electric push rod 42 is activated. The second electric push rod 42 extends downward to drive the connecting bracket 43 to move downward. The connecting bracket 43 drives the detection bracket 45 and the pH detection sensor 46 to move downward via the rotating shaft 44. The bottom end of the pH detection sensor 46 is inserted into the sample cup 22. The pH of the filtrate in the sample cup 22 is detected, and the detection data is automatically recorded.

[0112] Step S2, starting the drive motor 53, the drive motor 53 rotates to drive the two pulleys 51 to rotate, the two pulleys 51 rotate and drive the rotating base 21 to slide rightward on the surface of the slide rail 25 through the belt 52. When the rotating base 21 moves, it drives the sample cup 22 and the adjustment gear 23 to move rightward. When the sample cup 22 moves to the bottom of the liquid inlet pipe 28, the acidic pH regulating liquid is added to the sample cup 22 through the liquid inlet pipe 28 according to the detection data, and the filtrate is adjusted to a fixed pH value. The sample cup 22 is sealed with a sealing cover. When the adjustment gear 23 moves to the right and contacts the swinging gear plate 26, the drive motor 53 is controlled to rotate forward and reverse, so that the adjustment gear 23 drives the sample cup 22 to shake through the rotating rod 24, thereby quickly mixing the acidic pH regulating liquid and the filtrate.

[0113] After the acidic pH regulating liquid is mixed with the filtrate, the pH value of the filtrate is tested again using the detection mechanism 4 to ensure that the pH value of the filtrate is within a uniform standard;

[0114] In step S3, the sample cup 22 is adjusted to the left side of the top of the funnel 31 by the moving mechanism 5, and the sealing cover is removed. Then, the first electric push rod 36 is started. The first electric push rod 36 extends to drive the sliding tooth plate 33 to slide to the left on the inner side of the mounting frame 1. When the sliding tooth plate 33 contacts the adjusting gear 23, the adjusting gear 23 drives the sample cup 22 to rotate clockwise via the rotating rod 24, so that the filtrate in the sample cup 22 flows into the funnel 31, and the filtrate is filtered by the filter membrane 34. The filtered filtrate enters the collection cup 32 and is collected through a pipe connected to the bottom of the collection cup 32 for subsequent water pollution detection.

[0115] In step S4, after all the filtrate in the sample cup 22 is poured into the funnel 31 and the funnel 31 is sealed by the sealing cover, the sliding tooth plate 33 is continuously driven to move leftward by the first electric push rod 36. When the sliding tooth plate 33 is disengaged from the adjustment gear 23, the sample cup 22 is kept in an inclined state. The tooth set 62 is engaged with the transmission tooth set 61 under the movement of the sliding tooth plate 33, and the transmission gear 63 is driven to rotate by the transmission tooth set 61. The rotation of the transmission gear 63 drives the transmission teeth 68 and the piston rod 67 to move leftward. The movement of the piston rod 67 drives the first piston 66 to slide leftward in the exhaust pipe 65, thereby extracting the gas in the collection cup 32 through the hose, so that a negative pressure is formed in the collection cup 32.

[0116] Step S5: Start the second electric push rod 42. The second electric push rod 42 drives the pH detection sensor 46 to move upward through the connecting bracket 43, the rotating shaft 44, and the detection bracket 45. During the movement of the rotating shaft 44, the flip gear 83 is also driven to move upward. When the flip gear 83 contacts the flip gear plate 84, the flip gear 83 drives the detection bracket 45 and the pH detection sensor 46 to rotate 90 degrees clockwise through the rotating shaft 44.

[0117] In step S6, please combine step S4 and step S5. When the transmission gear 63 drives the piston rod 67 to move to the left through the transmission teeth 68, the movement of the piston rod 67 drives the second piston 73 to slide to the left on the inner side of the cleaning cylinder 72, and the cleaning liquid in the water outlet pipe 75 is transported to the water outlet pipe 75 through the hose and sprayed out through the nozzle 76 to clean the detection end of the pH detection sensor 46.

[0118] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A water pollution detection device for lithium waste salt treatment, characterized in that: It includes a mounting frame, an adjustment mechanism, a detection and processing mechanism, a detection mechanism and a moving mechanism; The adjustment mechanism includes a rotating seat, a sample cup and an adjustment gear, the inner side of the rotating seat is rotatably connected to a rotating rod, the front end of the rotating rod is fixedly connected to the sample cup, and the rear end of the rotating rod is fixedly connected to the adjustment gear, the front side of the mounting frame is fixedly provided with a slide rail, the rotating seat is slidably connected to the slide rail, the inner side of the mounting frame is slidably connected to a swinging gear plate, the back side of the swinging gear plate is fixedly provided with a spring, and the top of the mounting frame is provided with a liquid inlet pipe; The detection and processing mechanism includes a funnel, a collection cup, and a sliding tooth plate. The bottom of the funnel is arranged on the inner side of the top of the collection cup. A filter membrane is arranged on the inner side of the funnel. A mounting bracket is fixed on the front side of the mounting frame. The collection cup is clamped on the inner side of the mounting bracket. The detection mechanism is arranged at the top of the left side of the mounting frame and is used to detect the pH value of the filtrate; The moving mechanism is arranged on the front side of the mounting frame and is used for adjusting the position of the sample cup left and right.

2. The water pollution detection equipment for lithium extraction waste salt treatment according to claim 1 is characterized in that: The sliding tooth plate is slidably connected to the inner side of the mounting frame. A first electric push rod is fixedly provided on the top of the inner side of the mounting frame. The output end of the first electric push rod is fixedly connected to the sliding tooth plate.

3. The water pollution detection equipment for lithium extraction waste salt treatment according to claim 1 is characterized in that: The moving mechanism includes two pulleys rotatably connected to the front side of the mounting frame, the surfaces of the two pulleys are provided with belts, and the belts are fixedly connected to the rotating seat. A driving motor for driving the pulleys to rotate is provided on the left side of the back side of the mounting frame.

4. The water pollution detection equipment for lithium extraction waste salt treatment according to claim 1 is characterized in that: The inner side of the mounting frame is rotatably connected to a negative pressure suction mechanism, and the negative pressure suction mechanism includes a transmission gear group rotatably connected to the inner side of the mounting frame, a gear group is fixedly provided on the back side of the sliding gear plate, and the inner side of the mounting frame is rotatably connected to a transmission gear through a rotating shaft, and two first brackets are fixedly provided on the top of the inner side of the mounting frame, and an exhaust pipe is fixedly provided on the inner side of the two first brackets, and a first piston and a piston rod are slidably connected to the inner side of the exhaust pipe, and the right end of the piston rod is fixedly connected to the left side of the first piston, and a transmission tooth is fixed on the surface of the piston rod, and the transmission tooth is meshed with the transmission gear, and the exhaust pipe is connected to the collection cup through a hose.

5. The water pollution detection equipment for lithium extraction waste salt treatment according to claim 4 is characterized in that: A cleaning mechanism is fixedly provided on the inner side of the top of the mounting frame, and the cleaning mechanism includes two second brackets fixedly provided on the inner side of the top of the mounting frame, and a cleaning cylinder is fixedly provided on the inner side of the two second brackets, and a second piston is slidably connected to the inner side of the cleaning cylinder, and the left end of the piston rod is fixedly connected to the second piston. A fixed bracket is provided on the top of the left side of the mounting frame, and a water outlet pipe is provided on the inner side of the fixed bracket. A plurality of nozzles are connected to the surface of the water outlet pipe, and the cleaning cylinder is connected to the water outlet pipe through a hose.

6. The water pollution detection equipment for lithium extraction waste salt treatment according to claim 5 is characterized in that: The detection mechanism includes a detection frame fixedly mounted on the left side of the top of the mounting frame, a second electric push rod is arranged on the inner side of the detection frame, a connecting bracket is fixedly mounted on the output end of the second electric push rod, a rotating shaft is rotatably connected to the inner side of the connecting bracket, a detection bracket is fixedly mounted on the front side of the rotating shaft, a pH detection sensor is arranged on the inner side of the detection bracket, and the fixed bracket is fixedly connected to the detection frame.

7. The water pollution detection equipment for lithium extraction waste salt treatment according to claim 6 is characterized in that: A flip mechanism is fixedly provided on the back of the detection frame, and the flip mechanism includes two tracks fixedly provided on the back of the detection frame, the surfaces of the two tracks are slidably connected with sliding seats, the backs of the two sliding seats are fixedly connected to the connecting bracket, the surface of the rotating shaft is fixedly provided with a flip gear, and the back of the detection frame is fixedly provided with a flip gear plate.

8. The water pollution detection equipment for lithium extraction waste salt treatment according to claim 1 is characterized in that: An LED light group is provided on the left side of the mounting frame, and two adjusting screws are threadedly connected to the inner sides of both sides of the mounting frame. The bottoms of the four adjusting screws are fixed with support seats, and a placement rack is fixed on the top of the mounting frame. The peripheral side of the liquid inlet pipe is fixedly connected to the placement rack.

9. A method for recycling waste salt from lithium extraction into solid waste resources, characterized in that: The method for recycling waste salt from lithium extraction into solid waste includes the water pollution detection device according to any one of claims 1 to 8 and the following steps: Step S1, waste salt pretreatment: S11, dissolution: Mix the waste salt with water in a mass ratio of 1:3-5, heat to 60-80°C, and stir until completely dissolved; S12, impurity removal: add 0.1-0.5% EDTA solution to complex calcium and magnesium ions, adjust the pH to 6-7, and filter to remove insoluble matter such as silicon and aluminum; Step S2, Glauber's salt crystallization: S21, Concentration: Evaporate the filtrate to a density of 1.25-1.30 g / cm 3 , cooled to 10-20℃, and glauberite crystals were precipitated; S22, separation: centrifugation to separate crystals, and the mother liquor enters the sodium enrichment stage; Step S3, synthesis of potassium tetraphenylborate: Mix glauberite and sodium tetraphenylborate in a molar ratio of 1:1.05-1.1, and stir the mixture at a pH of 7-9 and a temperature of 25-40°C for 1-2 hours to generate a potassium tetraphenylborate precipitate; Step S4, sodium enrichment and thenardite crystallization: S41, concentration: evaporating the mother liquor after the reaction to a sodium sulfate concentration of ≥ 20%, cooling to 0-5°C to precipitate the sodium sulfate; S42. Dehydration: After the mirabilite is centrifuged and dried, anhydrous sodium sulfate is obtained.

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