A method for treating tantalum-niobium smelting wastewater

Abstract

The present invention discloses a method for treating tantalum-niobium smelting wastewater, which relates to the technical field of tantalum-niobium smelting, and specifically comprises the following steps: step one, wastewater collection and preliminary treatment; step two, physicochemical reaction and precipitation; step three, biological treatment; step four, MBR membrane pool treatment. The method for treating tantalum-niobium smelting wastewater can ensure uniform distribution in the sedimentation tank by intermittently adding coagulants or precipitants, avoiding excessive or low local concentration caused by a one-time large amount of input, thereby improving the coagulation effect, and more effectively removing impurities such as suspended matter, part of organic matter and sulfate in the wastewater. According to the water quality changes and treatment requirements in the sedimentation tank, the input amount of coagulants or precipitants can be flexibly adjusted to make the treatment process more accurate and efficient; by accurately controlling the input amount of coagulants or precipitants, waste caused by excessive addition can be avoided, and the consumption of chemical agents can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of tantalum-niobium smelting, and in particular to a method for treating tantalum-niobium smelting wastewater. Background Art

[0002] Tantalum and niobium smelting wastewater is a kind of industrial wastewater containing high concentration of suspended solids, organic matter and possibly sulfate and other complex components. The treatment of this kind of wastewater is of great significance for environmental protection and sustainable utilization of resources. Among the existing tantalum and niobium smelting wastewater treatment methods, coagulation and sedimentation method is usually used as the main treatment method;

[0003] When treating tantalum and niobium smelting wastewater, the existing coagulation and sedimentation method generally removes suspended solids, organic matter, etc. in the wastewater by continuously or all at once adding a large amount of coagulants or precipitants. However, this method has obvious defects. First, a large amount of coagulants or precipitants added all at once often leads to excessively high or low local concentrations in the sedimentation tank, and uneven coagulation effects, thereby affecting the wastewater treatment efficiency. Second, continuous large-scale additions not only increase the load of the sedimentation tank, but also may affect the treatment efficiency of the sedimentation tank, while increasing the energy consumption in the subsequent treatment process.

[0004] In addition, when storing coagulants or precipitants in a storage box, the material that has been stationary for a long time is prone to form agglomerates, sediments or compaction at the bottom of the storage box, resulting in difficulty in discharging the material. Existing treatment systems usually lack effective mechanisms to break up these agglomerates or sediments, thereby affecting the uniform distribution and flow of the material, increasing the risk of material blockage, and reducing the stability and reliability of the wastewater treatment system. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a method for treating tantalum-niobium smelting wastewater, which solves the technical problems mentioned in the background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a method for treating tantalum-niobium smelting wastewater, specifically comprising the following steps:

[0007] Step 1: Wastewater collection and preliminary treatment: Collect wastewater generated during the tantalum-niobium smelting process, perform deammoniation treatment to reduce the ammonia nitrogen content in the wastewater, discharge the wastewater into the regulating tank, add a regulator to cool the wastewater to reduce its temperature, and then put the wastewater into the sedimentation tank;

[0008] Step 2: Physicochemical reaction and precipitation: Put the coagulant and the precipitant into the storage box, and then use the control component to put the coagulant and the precipitant into the sedimentation tank;

[0009] Step 3: Biological treatment: The wastewater after physical and chemical treatment is sent to the anaerobic tank, and the organic matter and sulfate in the wastewater are further removed by the action of anaerobic microorganisms. The wastewater is then sent to the anoxic tank and the contact oxidation tank, and the nitrogen compounds in the wastewater are removed by the anoxic denitrification and aerobic nitrification processes. In the contact oxidation tank, the organic matter in the wastewater is further degraded by the oxidation action of aerobic microorganisms.

[0010] Step 4: MBR membrane pool treatment: Send the biologically treated wastewater into the MBR membrane pool, and use membrane separation technology to achieve mud and water separation, and further remove suspended matter, colloids, bacteria and viruses in the wastewater. The effluent quality of the MBR membrane pool is stable and can meet national emission standards;

[0011] A support plate is fixedly installed on the top of the sedimentation tank, a mounting frame is fixedly installed on the support plate, and two storage boxes are fixedly installed on the mounting frame, and a control component is arranged on the storage box;

[0012] The control component includes a lifting rod slidably installed on the material storage box, a discharge pipe is fixedly connected to the bottom of the lifting rod, material troughs are opened on both sides of the discharge pipe, a sealing plate for sealing the material trough is arranged at the inner end of the material trough, a fixed block is fixedly connected to the top of the outer wall of the sealing plate, and the fixed block is fixedly installed at the bottom of the material storage box, and a driving member for driving the lifting rod and the discharge pipe on the material storage box to move up and down is arranged on the top of the material storage box.

[0013] As a further preferred embodiment of the present technical solution, the driving member includes a dual-axis motor fixedly mounted on a mounting frame, the two ends of the dual-axis motor are respectively fixedly connected with a first driving shaft and a second driving shaft, the top of the first driving shaft is fixedly connected with a second bevel gear, and a transmission member is arranged on one side of the second bevel gear.

[0014] As a further preferred embodiment of the present technical solution, a support frame and a positioning plate are fixedly connected to the top of the storage box, a sliding rod is fixedly connected to the support frame, a sliding plate is slidably connected to the sliding rod, a sliding seat is fixedly connected to one end of the sliding plate, a moving rod is slidably connected to the sliding seat, the moving rod is slidably installed on the support frame, and the bottom of the moving rod is fixedly connected to the lifting rod, a bolt is arranged on the sliding seat, a first damping spring mounted on the moving rod is arranged between the sliding seat and the support frame, and a guide wheel is arranged on one side of the sliding seat.

[0015] As a further preferred embodiment of the present technical solution, the transmission member includes a rotating rod rotatably mounted on the positioning plate, the two ends of the rotating rod are respectively fixedly connected with a first bevel gear and an eccentric wheel, and the first bevel gear is meshingly connected with the second bevel gear, a circular groove is opened on one side of the eccentric wheel, and the guide wheel is located in the circular groove of the eccentric wheel.

[0016] As a further preferred embodiment of the present technical solution, a fixing frame is fixedly connected to the top of the mounting frame, a cross bar is connected to the fixing frame for laterally movement, a vertical bar is fixedly connected to the inner end of the cross bar, a guide bar is fixedly connected to the top of the vertical bar, a knocking rod is fixedly connected to the inner end of the knocking rod, a limiting block is fixedly connected to the outer wall of the knocking rod, and a second damping spring mounted on the cross bar is arranged between the limiting block and the fixing frame.

[0017] As a further preferred embodiment of the present technical solution, a disc is fixedly connected to the outer wall of the rotating rod, a plurality of trapezoidal blocks are arranged on the surface of the disc in a circular array, and the inclined surfaces of the guide rod and the trapezoidal blocks are matched with each other.

[0018] As a further preferred embodiment of the present technical solution, a cross fixedly mounted on the bottom of the support plate is provided at the bottom of the second drive shaft, and the upper and lower ends of the cross are rotatably connected to the fourth bevel gear and the fifth bevel gear respectively, and the two ends of the cross are rotatably connected to the third bevel gear meshing with the fourth bevel gear and the fifth bevel gear, the outer wall of the fourth bevel gear is provided with an outer rod in a circular array, the outer wall of the fifth bevel gear is provided with an inner rod in a circular array, and the outer rod and the inner rod are provided with stirring paddles for stirring the wastewater in the sedimentation tank.

[0019] As a further preferred embodiment of the present technical solution, a gear is fixedly connected to the top of the fourth bevel gear, a sleeve frame sleeved on a cross is provided above the gear, and a gear rod meshing with the gear is provided on the sleeve frame.

[0020] As a further optimization of the present technical solution, a transmission shaft is rotatably connected to the support plate, the transmission shaft is transmission-connected to the second drive shaft through a synchronous pulley transmission member, a linkage rod is fixedly connected to the bottom of the transmission shaft, and the other end of the linkage rod is rotatably connected to the gear rod.

[0021] Compared with the prior art, it has the following beneficial effects:

[0022] By intermittently adding coagulants or precipitants, it is possible to ensure that they are evenly distributed in the sedimentation tank, avoiding excessive or low local concentrations caused by a one-time large amount of addition, thereby improving the coagulation effect and more effectively removing suspended solids, some organic matter, sulfate and other impurities in the wastewater. According to the changes in water quality and treatment requirements in the sedimentation tank, the amount of coagulant or precipitant added can be flexibly adjusted to make the treatment process more accurate and efficient; by accurately controlling the amount of coagulant or precipitant added, waste caused by excessive addition can be avoided and the consumption of chemical agents can be reduced; continuous large amounts of input may increase the load of the sedimentation tank and affect its treatment efficiency, while intermittent input can disperse this load, allowing the sedimentation tank to maintain a high treatment efficiency and reduce energy consumption in subsequent treatment processes; by loosening and tightening the bolts, the position of the guide wheel can be easily adjusted, thereby changing the distance the discharge pipe moves up and down and the amount of coagulant or precipitant added. This design makes the system easy to adjust and maintain, and improves the flexibility and reliability of the system.

[0023] The vibration generated by knocking on the storage box helps to break up the agglomeration or deposition of coagulants or precipitants that may form inside the storage box, ensuring that the material can be evenly distributed in the storage box. The vibration can promote the flow of materials in the storage box, avoid material retention or blockage in the storage box, and ensure that the material can be smoothly discharged from the discharge pipe; the knocking action can accelerate the falling speed of the material inside the storage box, especially when the material fluidity is poor or there is residue at the bottom of the storage box, the material can be more effectively discharged from the storage box by knocking; materials that have been stationary for a long time are prone to form compaction at the bottom of the storage box, resulting in difficulty in discharging. The knocking treatment can destroy this compaction structure and restore the material to a loose state, which is convenient for subsequent discharging operations; by knocking on the storage box, the risk of material blockage in the storage box can be reduced, ensuring the stable operation of the wastewater treatment system. The design of the knocking mechanism makes the discharge process of the storage box more reliable, reducing system failures and downtime caused by material blockage.

[0024] The alternating positive and negative stirring method helps to break up the static layers and dead corners in the wastewater, so that the suspended matter, coagulants or precipitants in the wastewater can be more fully mixed and reacted. This stirring method can increase the turbulence in the wastewater, thereby improving the stirring efficiency and making the wastewater treatment process more efficient. The alternating positive and negative stirring helps the coagulant or precipitant to be more evenly dispersed in the wastewater, avoiding the situation where the local concentration is too high or too low, thereby improving its treatment effect. The positive and negative rotation of the stirring paddle can more effectively aggregate the suspended matter and other impurities in the wastewater into larger particles, which is convenient for subsequent precipitation and separation. Sufficient mixing and reaction help the coagulant or precipitant to play a better role and remove suspended matter, organic matter and other impurities in the wastewater, thereby improving the water quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the control component in the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of the material storage box, lifting rod, discharge pipe, rotating rod, disc and trapezoidal block in the present invention;

[0028] Figure 4 It is a schematic cross-sectional view of the structure of the discharge pipe in the present invention;

[0029] Figure 5 for Figure 3 The enlarged view of point A in the middle;

[0030] Figure 6 It is a schematic diagram of the structure of the horizontal rod, vertical rod, guide rod, knocking rod and trapezoidal block in the present invention;

[0031] Figure 7 It is a schematic diagram of the structure of the gear rod, the linkage rod, the outer rod, and the fifth bevel gear in the present invention;

[0032] Figure 8 for Figure 7 Enlarged view of point B in the middle.

[0033] In the figure: 1, sedimentation tank; 2, support plate; 3, mounting frame; 4, storage box; 5, control component; 11, liquid inlet pipe; 12, liquid outlet pipe; 51, lifting rod; 52, discharge pipe; 53, material trough; 54, fixed block; 55, sealing plate; 56, support frame; 57, positioning plate; 58, slide bar; 59, slide plate; 510, slide seat; 511, moving rod; 512, first damping spring; 513, bolt; 514, guide wheel; 518, rotating rod; 519, eccentric wheel; 520, first bevel gear; 521, disc; 522, trapezoidal block; 523, dual-axis motor ; 524, the first drive shaft; 525, the second drive shaft; 526, the second bevel gear; 527, the fixed frame; 528, the cross bar; 529, the vertical rod; 530, the guide rod; 531, the knock rod; 532, the limit block; 533, the second damping spring; 534, the cross; 535, the third bevel gear; 536, the fourth bevel gear; 537, the fifth bevel gear; 538, the outer rod; 539, the inner rod; 540, the gear; 541, the sleeve frame; 542, the gear rod; 543, the transmission shaft; 544, the synchronous belt pulley transmission member; 545, the linkage rod; 546, the stirring paddle. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings of the specification. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1: Combination Figure 1-Figure 8 As shown, the present invention provides a technical solution: a method for treating tantalum-niobium smelting wastewater, specifically comprising the following steps:

[0036] Step 1, wastewater collection and preliminary treatment: Collect wastewater generated during the tantalum-niobium smelting process, carry out deammoniation treatment to reduce the ammonia nitrogen content in the wastewater, discharge the wastewater into the regulating tank, adjust the pH value of the wastewater to a suitable range (such as 7-8) by adding regulators such as industrial sulfuric acid, cool the wastewater to reduce its temperature, create favorable conditions for subsequent treatment, and then put the wastewater into the sedimentation tank 1;

[0037] Step 2, physicochemical reaction and precipitation: Put the coagulant (such as PAC, PAM) and the precipitant (such as barium chloride) into the storage box 4, and then use the control component 5 to put the coagulant and the precipitant into the sedimentation tank 1, remove the suspended matter, part of the organic matter and sulfate in the wastewater through chemical reaction and coagulation, and separate the formed precipitate from the wastewater through precipitation;

[0038] Step 3: Biological treatment: The wastewater after physical and chemical treatment is sent to the anaerobic tank, and the organic matter and sulfate in the wastewater are further removed by the action of anaerobic microorganisms. The wastewater is then sent to the anoxic tank and the contact oxidation tank, and the nitrogen compounds in the wastewater are removed by the anoxic denitrification and aerobic nitrification processes. In the contact oxidation tank, the organic matter in the wastewater is further degraded by the oxidation action of aerobic microorganisms.

[0039] Step 4: MBR membrane pool treatment: Send the biologically treated wastewater into the MBR membrane pool, and use membrane separation technology to achieve mud and water separation, and further remove suspended matter, colloids, bacteria and viruses in the wastewater. The water quality of the MBR membrane pool effluent is stable and can meet national emission standards.

[0040] An inlet pipe 11 is provided at the upper left end of the sedimentation tank 1, and an outlet pipe 12 is provided at the lower right end of the sedimentation tank 1. The inlet pipe 11 is used for wastewater to enter the sedimentation tank 1 for chemical reaction and coagulation, and the outlet pipe 12 is used to discharge the wastewater after the reaction;

[0041] A support plate 2 is fixedly installed on the top of the sedimentation tank 1, a mounting frame 3 is fixedly installed on the support plate 2, and two storage boxes 4 are fixedly installed on the mounting frame 3, and a control component 5 is arranged on the storage box 4;

[0042] The control assembly 5 includes a lifting rod 51 slidably mounted on the material storage box 4, a discharge pipe 52 is fixedly connected to the bottom of the lifting rod 51, material grooves 53 are provided on both sides of the discharge pipe 52, and a sealing plate 55 for sealing the material groove 53 is provided at the inner end of the material groove 53, a fixing block 54 is fixedly connected to the top of the outer wall of the sealing plate 55, and the fixing block 54 is fixedly mounted on the bottom of the material storage box 4, and a driving member for driving the lifting rod 51 and the discharge pipe 52 to move up and down on the material storage box 4 is provided on the top of the material storage box 4;

[0043] The driving member includes a double-axis motor 523 fixedly mounted on the mounting frame 3, the two ends of the double-axis motor 523 are respectively fixedly connected with a first driving shaft 524 and a second driving shaft 525, the top of the first driving shaft 524 is fixedly connected with a second bevel gear 526, and a transmission member is arranged on one side of the second bevel gear 526;

[0044] A support frame 56 and a positioning plate 57 are fixedly connected to the top of the storage box 4, a slide bar 58 is fixedly connected to the support frame 56, a slide bar 58 is slidably connected to a slide plate 59, one end of the slide plate 59 is fixedly connected to a slide seat 510, a moving rod 511 is slidably connected to the slide seat 510, the moving rod 511 is slidably installed on the support frame 56, and the bottom of the moving rod 511 is fixedly connected to the lifting rod 51, a bolt 513 is provided on the slide seat 510, and the bolt 513 is used to fix the slide seat 510 on the moving rod 511. By loosening the bolt 513, the slide seat 510 is moved to a position on the moving rod 511. After the position is adjusted, the bolt 513 is tightened again. The slide 510 is fixedly connected to the moving rod 511, that is, the position of the guide wheel 514 is adjusted, which changes the distance that the eccentric wheel 519 drives the guide wheel 514, the slide 510, the moving rod 511 of the slide plate 59, the lifting rod 51, and the discharge pipe 52 to move up and down when the eccentric wheel 519 rotates, changes the material trough 53 of the discharge pipe 52 to enter the material storage box 4, thereby changing the amount of coagulant or precipitant in the material storage box 4 entering the discharge pipe 52, and further changes the amount of coagulant or precipitant input into the sedimentation tank 1. A first damping spring 512 sleeved on the moving rod 511 is provided between the slide 510 and the support frame 56, and a guide wheel 514 is provided on one side of the slide 510;

[0045] The transmission member includes a rotating rod 518 rotatably mounted on the positioning plate 57, and the two ends of the rotating rod 518 are respectively fixedly connected with a first bevel gear 520 and an eccentric wheel 519, and the first bevel gear 520 is meshingly connected with the second bevel gear 526. A circular groove is opened on one side of the eccentric wheel 519, and the guide wheel 514 is located in the circular groove of the eccentric wheel 519.

[0046] In the embodiment of the present invention, the dual-axis motor 523 is turned on to drive the first drive shaft 524 and the second drive shaft 525 to rotate synchronously, so that the first drive shaft 524 drives the second bevel gear 526 to rotate, and the second bevel gear 526 drives the meshed first bevel gear 520 and the rotating rod 518 to rotate, so that the rotating rod 518 drives the eccentric wheel 519 to rotate, so that when the eccentric wheel 519 rotates, it cooperates with the elastic force of the first damping spring 512 to drive the guide wheel 514, the slide seat 510, and the slide plate 59 to move. The movable rod 511, the lifting rod 51, and the discharge pipe 52 move up and down. When the discharge pipe 52 located at the bottom of the storage box 4 is driven to move upward, the fixing block 54 and the sealing plate 55 are fixedly installed at the bottom of the storage box 4. This makes it possible for the sealing plate 55 to no longer seal the material trough 53 when the discharge pipe 52 moves upward. This makes it possible for the material trough 53 of the discharge pipe 52 to enter the interior of the storage box 4. The coagulant or precipitant in the storage box 4 enters the discharge pipe 52 through the material trough 53, and is discharged into the sedimentation tank 1 through the discharge pipe 52. When the discharge pipe 52 moves downward, the sealing plate 55 gradually seals the trough 53, so that the trough 53 moves to the bottom of the storage box 4. At this time, the coagulant or precipitant in the storage box 4 no longer enters the discharge pipe 52 through the trough 53, that is, the coagulant or precipitant is intermittently added to the sedimentation tank 1 through the up and down movement of the discharge pipe 52. The intermittent addition can ensure that the coagulant or precipitant is evenly distributed in the sedimentation tank 1, avoiding excessively high or low local concentrations caused by a large amount of one-time addition, thereby improving the coagulation effect and removing suspended matter in the sewage more effectively; the intermittent addition method can flexibly adjust the amount of input according to the water quality changes and treatment requirements in the sedimentation tank 1, avoiding unnecessary waste, thereby reducing the cost of the agent; the continuous large-scale addition of coagulant or precipitant may increase the load of the sedimentation tank 1 and affect its treatment efficiency, while the intermittent addition can disperse this load, so that the sedimentation tank 1 maintains a high treatment efficiency; the intermittent addition method helps to maintain the stability of the water quality in the sedimentation tank 1 and avoid the unstable water quality caused by fluctuations in the agent concentration;

[0047] By loosening the bolt 513, the position of the sliding seat 510 on the moving rod 511 is moved. After the position is adjusted, the bolt 513 is tightened to fix the sliding seat 510 and the moving rod 511, that is, the position of the guide wheel 514 is adjusted. This changes the distance that the eccentric wheel 519 drives the guide wheel 514, the sliding seat 510, the sliding plate 59 moving rod 511, the lifting rod 51, and the discharge pipe 52 to move up and down when rotating, and changes the material trough 53 of the discharge pipe 52 to enter the storage box 4, thereby changing the coagulant or precipitant in the storage box 4 to enter the discharge pipe 52, and then change the amount of coagulant or precipitant input to sedimentation tank 1, and then adjust the amount of coagulant or precipitant input in time according to the sewage quality and treatment requirements in sedimentation tank 1, which can more effectively remove suspended solids, part of organic matter and sulfate in wastewater, thereby improving the treatment efficiency of the entire water treatment system; by accurately controlling the input amount of coagulant or precipitant, waste and unnecessary cost increase caused by excessive addition can be avoided, which can not only reduce the consumption of chemical agents, but also reduce the energy consumption in the subsequent treatment process.

[0048] Embodiment 2: Combination Figure 6 As shown, on the basis of the first embodiment, a fixing frame 527 is fixedly connected to the top of the mounting frame 3, a cross bar 528 is connected to the fixing frame 527 for transverse movement, a vertical rod 529 is fixedly connected to the inner end of the cross bar 528, a guide rod 530 is fixedly connected to the top of the vertical rod 529, a knocking rod 531 is fixedly connected to the inner end of the knocking rod 531, a limited block 532 is fixedly connected to the outer wall of the knocking rod 531, and a second damping spring 533 sleeved on the cross bar 528 is provided between the limited block 532 and the fixing frame 527;

[0049] A disc 521 is fixedly connected to the outer wall of the rotating rod 518 . A plurality of trapezoidal blocks 522 are arranged in a circular array on the surface of the disc 521 . The inclined surfaces of the guide rod 530 and the trapezoidal blocks 522 are matched with each other.

[0050] In an embodiment of the present invention, when the rotating rod 518 rotates, it can drive the disc 521 and the trapezoidal block 522 to rotate synchronously, so that the inclined surface of the trapezoidal block 522 pushes the guide rod 530 and the vertical rod 529 to move inward, and drives the cross bar 528, the knocking rod 531, and the limit block 532 to move outward, and compresses the second damping spring 533. When the trapezoidal block 522 slides over the inclined surface of the guide rod 530, the knocking rod 531 and the cross bar 528 move toward one side of the storage box 4 under the elastic force of the second damping spring 533, so that the knocking rod 531 knocks the storage box 4, thereby facilitating the discharge of the coagulant or precipitant inside the storage box 4. Knocking the storage box 4 can To generate vibration, this vibration helps to break up the agglomeration or deposition of coagulant or precipitant that may form inside the storage box 4, and promote the uniform distribution and flow of materials in the storage box 4, which helps to ensure that the material can be discharged smoothly from the discharge pipe 52 to avoid blockage or retention; the knocking action can accelerate the falling speed of the material inside the storage box 4, especially when the material fluidity is poor or there is residue at the bottom of the storage box 4, by knocking, the material can be more effectively discharged from the storage box 4, and the discharge efficiency is improved. Materials that have been stationary for a long time are prone to form compaction at the bottom of the storage box 4, which makes discharge difficult. The knocking treatment can destroy this compaction structure, so that the material returns to a loose state, which is convenient for subsequent discharge operations.

[0051] Example 3: Combination Figure 7 , Figure 8 As shown, on the basis of the second embodiment, a cross 534 fixedly mounted on the bottom of the support plate 2 is provided at the bottom of the second drive shaft 525, and the upper and lower ends of the cross 534 are rotatably connected to the fourth bevel gear 536 and the fifth bevel gear 537 respectively, and the two ends of the cross 534 are rotatably connected to the third bevel gear 535 meshing with the fourth bevel gear 536 and the fifth bevel gear 537, and the outer wall of the fourth bevel gear 536 is provided with an outer rod 538 in a circumferential array, and the outer wall of the fifth bevel gear 537 is provided with an inner rod 539 in a circumferential array, and the outer rod 538 and the inner rod 539 are provided with a stirring paddle 546 for stirring the wastewater in the sedimentation tank 1;

[0052] A gear 540 is fixedly connected to the top of the fourth bevel gear 536. A sleeve frame 541 sleeved on the cross 534 is provided above the gear 540. A gear rod 542 meshing with the gear 540 is provided on the sleeve frame 541.

[0053] A transmission shaft 543 is rotatably connected to the support plate 2 , and the transmission shaft 543 is transmission-connected to the second drive shaft 525 via a synchronous pulley transmission member 544 . A linkage rod 545 is fixedly connected to the bottom of the transmission shaft 543 , and the other end of the linkage rod 545 is rotatably connected to the gear rod 542 .

[0054] In the embodiment of the present invention, when the second drive shaft 525 of the dual-axis motor 523 rotates, the second drive shaft 525 drives the transmission shaft 543 to rotate through the synchronous pulley transmission member 544. The transmission shaft 543 drives the linkage rod 545 to rotate synchronously, so that the linkage rod 545 drives the gear rod 542 to reciprocate when rotating, so that the gear rod 542 drives the gear 540 to reciprocate during the reciprocating movement, so that the gear 540 drives the fourth bevel gear 536 to rotate, so that the fourth bevel gear 536 cooperates with the meshing third bevel gear 535 to drive the fifth bevel gear 537 to rotate in the opposite direction, thereby causing the outer rod 538 and the inner rod 539 to rotate in opposite directions, so that the outer rod 538 and the inner rod 539 rotate in opposite directions. 38. The inner rod 539 drives the stirring paddle 546 to stir the wastewater, coagulant or precipitant in the sedimentation tank 1. The alternating forward and reverse stirring method helps to break the static layer and dead corners in the wastewater, so that the suspended matter, coagulant or precipitant in the wastewater can be more fully mixed and reacted. This stirring method can increase the turbulence in the wastewater, thereby improving the stirring efficiency and making the wastewater treatment process more efficient. The alternating forward and reverse stirring helps the coagulant or precipitant to be more evenly dispersed in the wastewater, thereby improving its treatment effect. Through the forward and reverse rotation of the stirring paddle 546, impurities such as suspended matter in the wastewater can be more effectively aggregated into larger particles, which is convenient for subsequent sedimentation and separation.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for treating tantalum-niobium smelting wastewater, characterized in that: The specific steps include: Step 1: Wastewater collection and preliminary treatment: Collect wastewater generated during the tantalum-niobium smelting process, perform deammoniation treatment to reduce the ammonia nitrogen content in the wastewater, discharge the wastewater into a regulating tank, add a regulator to cool the wastewater to reduce its temperature, and then put the wastewater into a sedimentation tank (1); Step 2: Physicochemical reaction and precipitation: Put the coagulant and the precipitant into the storage box (4), and then use the control component (5) to put the coagulant and the precipitant into the sedimentation tank (1); Step 3: Biological treatment: The wastewater after physical and chemical treatment is sent to the anaerobic tank, and the organic matter and sulfate in the wastewater are further removed by the action of anaerobic microorganisms. The wastewater is then sent to the anoxic tank and the contact oxidation tank, and the nitrogen compounds in the wastewater are removed by the anoxic denitrification and aerobic nitrification processes. In the contact oxidation tank, the organic matter in the wastewater is further degraded by the oxidation action of aerobic microorganisms. Step 4: MBR membrane pool treatment: Send the biologically treated wastewater into the MBR membrane pool, and use membrane separation technology to achieve mud and water separation, and further remove suspended matter, colloids, bacteria and viruses in the wastewater. The effluent quality of the MBR membrane pool is stable and can meet national emission standards; A support plate (2) is fixedly mounted on the top of the sedimentation tank (1), a mounting frame (3) is fixedly mounted on the support plate (2), two material storage boxes (4) are fixedly mounted on the mounting frame (3), and a control component (5) is provided on the material storage box (4); The control component (5) comprises a lifting rod (51) slidably mounted on the material storage box (4); a discharge pipe (52) is fixedly connected to the bottom of the lifting rod (51); material grooves (53) are provided on both sides of the discharge pipe (52); a sealing plate (55) for sealing the material groove (53) is provided at the inner end of the material groove (53); a fixing block (54) is fixedly connected to the top of the outer wall of the sealing plate (55); the fixing block (54) is fixedly mounted on the bottom of the material storage box (4); and a driving member for driving the lifting rod (51) and the discharge pipe (52) located on the material storage box (4) to move up and down is provided on the top of the material storage box (4); The driving member comprises a double-axis motor (523) fixedly mounted on the mounting frame (3); the two ends of the double-axis motor (523) are respectively fixedly connected to a first driving shaft (524) and a second driving shaft (525); the top of the first driving shaft (524) is fixedly connected to a second bevel gear (526); and a transmission member is provided on one side of the second bevel gear (526); The top of the material storage box (4) is fixedly connected to a support frame (56) and a positioning plate (57); a slide bar (58) is fixedly connected to the support frame (56); a slide plate (59) is slidably connected to the slide bar (58); a slide seat (510) is fixedly connected to one end of the slide plate (59); a moving rod (511) is slidably connected to the slide seat (510); the moving rod (511) is slidably mounted on the support frame (56); and the bottom of the moving rod (511) is fixedly connected to the lifting rod (51); a bolt (513) is provided on the slide seat (510); a first damping spring (512) sleeved on the moving rod (511) is provided between the slide seat (510) and the support frame (56); and a guide wheel (514) is provided on one side of the slide seat (510); The transmission member comprises a rotating rod (518) rotatably mounted on the positioning plate (57), the two ends of the rotating rod (518) being respectively fixedly connected to a first bevel gear (520) and an eccentric wheel (519), and the first bevel gear (520) is meshingly connected to a second bevel gear (526), ​​a circular groove is formed on one side of the eccentric wheel (519), and the guide wheel (514) is located in the circular groove of the eccentric wheel (519); The top of the mounting frame (3) is fixedly connected to a fixing frame (527), the fixing frame (527) is laterally movably connected to a cross bar (528), the inner end of the cross bar (528) is fixedly connected to a vertical bar (529), the top of the vertical bar (529) is fixedly connected to a guide bar (530), the inner end of a knocking rod (531) is fixedly connected to a knocking rod (531), the outer wall of the knocking rod (531) is fixedly connected to a limit block (532), and a second damping spring (533) sleeved on the cross bar (528) is provided between the limit block (532) and the fixing frame (527); A circular disc (521) is fixedly connected to the outer wall of the rotating rod (518), a plurality of trapezoidal blocks (522) are arranged in a circular array on the surface of the circular disc (521), and the guide rod (530) and the inclined surfaces of the trapezoidal blocks (522) are mutually adapted.

2. The method for treating tantalum-niobium smelting wastewater according to claim 1, characterized in that: A cross (534) fixedly mounted on the bottom of the support plate (2) is provided at the bottom of the second drive shaft (525); the upper and lower ends of the cross (534) are rotatably connected to a fourth bevel gear (536) and a fifth bevel gear (537), respectively; both ends of the cross (534) are rotatably connected to a third bevel gear (535) meshingly connected to the fourth bevel gear (536) and the fifth bevel gear (537); an outer rod (538) is provided on the outer wall of the fourth bevel gear (536) in a circumferential array; an inner rod (539) is provided on the outer wall of the fifth bevel gear (537) in a circumferential array; and stirring paddles (546) for stirring wastewater in the sedimentation tank (1) are provided on the outer rods (538) and the inner rods (539).

3. The method for treating tantalum-niobium smelting wastewater according to claim 2, characterized in that: A gear (540) is fixedly connected to the top of the fourth bevel gear (536), a sleeve frame (541) sleeved on the cross (534) is provided above the gear (540), and a gear rod (542) meshing with the gear (540) is provided on the sleeve frame (541).

4. The method for treating tantalum-niobium smelting wastewater according to claim 3, characterized in that: A transmission shaft (543) is rotatably connected to the support plate (2); the transmission shaft (543) is transmission-connected to the second drive shaft (525) via a synchronous pulley transmission member (544); a linkage rod (545) is fixedly connected to the bottom of the transmission shaft (543); the other end of the linkage rod (545) is rotatably connected to the gear rod (542).

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