A method and device for treating phosphogypsum leachate

Abstract

The application discloses a kind of phosphogypsum leachate processing method and device, it is related to sewage treatment technical field, comprising: reaction tank and fixedly connected in the inside of the reaction tank support seat, the inside of the support seat is rotatably connected with stirring rod, the top of the support seat is equipped with first drive motor, and the output of the first drive motor is fixedly connected with the stirring rod;Suction aid, located in the inside of the reaction tank, for auxiliary with the sewage at the bottom of the reaction tank is pumped to top and mixed reagent discharge.The application is by being provided with suction aid, so that sewage forms the circulating flow of "bottom-top", this process can avoid the local concentration of bottom sewage due to gravity deposition (or pollutant enrichment) too high, while let top not fully mixed sewage and bottom circulating sewage again contact, so that the sewage concentration in the whole reaction tank is more uniform.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically a method and apparatus for treating phosphogypsum leachate. Background Technology

[0002] Phosphogypsum leachate is wastewater containing various pollutants that is formed when rainwater, surface water, or groundwater seeps into the phosphogypsum stockpile during its storage or storage process, and then leaches and soaks it. It is complex in composition and highly polluting, and is one of the main environmental risk points in the phosphate chemical industry.

[0003] When treating phosphogypsum leachate wastewater, core pollutants such as phosphates, sulfates, heavy metals, and fluorides are typically removed through chemical precipitation and flocculation. However, when the phosphogypsum leachate wastewater is sent to the treatment tank to react with chemicals, the chemicals are usually poured into the wastewater, and then agitation is performed by a motor-driven stirring blade. Existing technologies usually rely solely on the stirring blade for mechanical agitation, which has a limited agitation range (especially at the bottom of the reaction tank, where "dead zones" are easily formed). High-concentration pollutants deposited at the bottom (such as particulate matter and heavy metals in the phosphogypsum leachate) are difficult to agitate sufficiently. Furthermore, phosphogypsum leachate contains a large amount of high-density pollutants (such as phosphogypsum particles, heavy metal precipitates, and suspended solids), whose density is much greater than that of water, naturally exhibiting a tendency to settle due to gravity.

[0004] The stirring intensity of existing technologies is usually insufficient to completely counteract this settling trend. During stirring, the upper layer of sewage flows faster, and pollutants are temporarily dispersed; however, the lower layer of sewage flows slower, and pollutants are easily deposited to the bottom of the tank under gravity, forming a high-concentration accumulation. This results in uneven mixing of sewage and chemicals, leading to low sewage treatment efficiency. To address this issue, we provide a method and apparatus for treating phosphogypsum leachate to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the problem that the stirring intensity of existing technologies is usually insufficient to completely counteract this settling tendency. During stirring, the upper layer of sewage flows faster, and pollutants are temporarily dispersed; however, the lower layer of sewage flows slower, and pollutants are easily deposited to the bottom of the pool under gravity, forming a high-concentration accumulation, which leads to uneven mixing of sewage and reagents. This invention provides a method and apparatus for treating phosphogypsum leachate.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a phosphogypsum leachate treatment device, comprising: a reaction tank and a support base fixedly connected to the inner side of the reaction tank, a stirring rod rotatably connected to the inner side of the support base, a first drive motor installed on the top of the support base, and the output end of the first drive motor fixedly connected to the stirring rod; a suction auxiliary device, located inside the reaction tank, for assisting in pumping the wastewater at the bottom of the reaction tank to the top and mixing it with the reagent for discharge, the suction auxiliary device including a fixed shell fixedly connected to the bottom of the stirring rod, a guide shell slidably connected to the outer wall of the fixed shell; a contraction regulator, located between the fixed shell and the guide shell, for adjusting the position of the guide shell; and a squeezing auxiliary component, located inside the fixed shell, for crushing particles or flocculent matter entering the inner side of the fixed shell.

[0007] As a further embodiment of the present invention: the suction aid further includes a first fixed shell fixedly connected to the bottom of the support base, the first fixed shell being rotatably connected to the stirring rod, a delivery pump being installed on the top of the support base, a first guide pipe being fixedly connected to the input end of the delivery pump, and one end of the first guide pipe extending through to the inner side of the first fixed shell, a second guide pipe being fixedly connected to the output end of the delivery pump, a guide hole communicating with the fixed shell being opened on the inner side of the stirring rod, and a guide hole communicating with the internal guide hole being opened on the outer side of the stirring rod, and a drug addition component being provided on one side of the first fixed shell.

[0008] As a further embodiment of the present invention: the drug addition assembly includes a suspension seat fixedly connected to one side of the support base, a storage hopper fixedly connected to the top of the suspension seat, a discharge port extending through to the bottom of the suspension seat on the inner side of the storage hopper, and a drug delivery pipe fixedly connected to the bottom of the discharge port.

[0009] As a further embodiment of the present invention: the drug addition assembly further includes a rotating rod rotatably connected to the inner side of the suspension seat, and a plurality of partition plates are fixedly connected to the outer wall of the rotating rod. The plurality of partition plates are distributed at equal distances around the outer wall of the rotating rod. A third drive motor is installed on one side of the suspension seat, and the output end of the third drive motor extends through to the inner side of the suspension seat and is fixedly connected to the rotating rod.

[0010] As a further embodiment of the present invention: the shrinkage regulator includes two movable blocks fixedly connected to the inner side of the guide shell, the outer wall of the fixed shell is provided with a guide groove that matches the movable blocks, the guide shell is slidably connected to the fixed shell through the two movable blocks fixedly connected to the inner side, and a first connecting spring is installed between the movable blocks and the guide groove.

[0011] As a further embodiment of the present invention: the shrinkage regulator further includes connecting blocks fixedly connected to the outer walls on both sides of the guide shell, and a second fixed shell is fixedly connected to the outer walls on both sides of the fixed shell. A second drive motor is installed at one end of the second fixed shell, and a take-up roller is fixedly connected to the output end of the second drive motor. One end of the take-up roller extends through to the inner side of the second fixed shell and is rotatably connected to the second fixed shell. A traction rope is wound on the outer wall of the take-up roller, and one end of the traction rope is fixedly connected to the connecting block.

[0012] As a further embodiment of the present invention: the extrusion auxiliary component includes a cavity formed in the inner wall of the fixed shell, two sets of connecting plates are slidably connected to the inner side of the cavity, each set of connecting plates has two plates, and the two connecting plates are symmetrically arranged about the central axis of the fixed shell. Multiple crushing cones are fixedly connected to the inner side of each connecting plate, and the crushing cones between every two connecting plates are staggered. A second connecting spring is installed between the cavity and the connecting plate.

[0013] As a further embodiment of the present invention: the extrusion auxiliary component further includes a spherical rod fixedly connected to one side of the connecting plate, and one end of the spherical rod extends through to the outside of the fixed shell. A plurality of arched blocks are fixedly connected to the inner side of the guide shell, and the plurality of arched blocks are evenly distributed on the inner side of the guide shell.

[0014] This invention also discloses a method for treating phosphogypsum leachate, using the aforementioned phosphogypsum leachate treatment device, comprising the following steps:

[0015] S1. When the phosphogypsum leachate enters the inside of the reaction tank and needs to be treated, the reagent is added to the inside of the reaction tank, and then the first drive motor is started. The output of the first drive motor drives the stirring rod to mix and stir the wastewater and the reagent.

[0016] S2. During the wastewater treatment process, the delivery pump is started. The delivery pump attempts to draw water from the inside of the guide shell through the guide hole on the inner side of the stirring rod, so that the wastewater at the bottom of the reaction tank can flow into the first fixed shell through the stirring rod and be discharged from the top of the reaction tank through the second guide pipe. During this process, the third drive motor is started, and the output end of the third drive motor drives the rotating rod to rotate slowly. Thus, the powdered medicine in the storage hopper can be intermittently transported through the medicine delivery pipe to the inside of the first fixed shell through multiple partition plates to mix with the wastewater. Then, it is discharged back into the reaction tank through the second guide pipe.

[0017] S3. When the sewage enters the interior of the guide shell, the second drive motor is started. The output end of the second drive motor can rotate in the forward and reverse directions under the control of the PLC controller. When the output end of the second drive motor rotates in the forward direction, it drives the winding roller to wind up the traction rope, thereby causing the connecting block to pull the guide shell to move laterally, thereby adjusting the position of the suction port.

[0018] S4. As the guide shell moves toward the fixed shell, it drives the two sets of arched blocks to move synchronously. When the lowest point of the inclined surface on one side of the arched block contacts the spherical rod, it pushes the spherical rod through the connecting plate to drive the crushing cone to move toward the middle position of the fixed shell. Since the two sets of crushing cones are symmetrically arranged and staggered, they can crush the flocculent material or solid impurities passing through the channel of the fixed shell.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. By setting up a suction aid, the sewage forms a "bottom-top" circulating flow. This process can avoid excessively high local concentrations (or pollutant enrichment) in the sewage at the bottom due to gravity sedimentation. At the same time, it allows the sewage that is not fully mixed at the top to come into contact with the sewage circulating up from the bottom again, making the sewage concentration in the entire reaction tank more uniform. The reagent enters the first fixed shell with the circulating sewage and mixes, and then is discharged into the reaction tank from the top through the second guide pipe. It is equivalent to the reagent being added "dispersed" in the circulating flow, avoiding the problems of excessively high local reagent concentrations (which may cause side reactions) or insufficient local treatment (incomplete treatment) caused by a large amount of reagent added at once. At the same time, the pollutants deposited at the bottom are continuously carried into the circulating flow and fully mixed with the sewage in the upper layer, ensuring that the sewage in any area of ​​the reaction tank (whether it is the upper layer or the lower layer) can come into contact with the effective concentration of reagent, fundamentally eliminating the problem of "good treatment in the upper layer and high concentration in the lower layer", and further improving the mixing uniformity.

[0021] 2. By setting a shrinkage regulator, when sewage enters the guide shell, the second drive motor is started. The output of the second drive motor can rotate forward and backward under the control of the PLC controller. When the output of the second drive motor rotates forward, it drives the winding roller to wind up the traction rope, thereby causing the connecting block to pull the guide shell to move laterally. This adjusts the position of the suction port, thereby expanding the suction range and eliminating dead corners inside the reaction tank. This ensures that high-concentration sewage at all locations at the bottom can be evenly sucked into the circulation system, further avoiding the problem of "local sedimentation and insufficient treatment", thus further improving the sewage treatment effect.

[0022] 3. By setting up extrusion aids, flocculent matter or solid impurities passing through the fixed shell channel can be crushed. Because pollutants inside uncrushed coarse flocculent matter or particles (such as phosphorus ions and heavy metals encased in the flocculent) are difficult to fully contact with the reagent, the reaction will be incomplete, affecting the treatment effect. Therefore, crushing disperses the coarse flocculent matter and crushes the solid particles, significantly increasing the surface area exposed to the pollutants. Simultaneously, the crushed fine particles, under the action of circulation suction and stirring, can be more evenly dispersed in the wastewater, reacting more effectively with the reagent (especially through...). The powdered reagents added through the delivery pipe fully collide and react, improving the conversion rate of pollutants (such as the precipitation rate of phosphorus and the removal rate of heavy metals), making the treatment more thorough. If coarse flocs or particles are not broken up, they are easily redeposited to the bottom of the reaction tank under gravity. Long-term accumulation will lead to a reduction in the effective volume of the tank bottom and a decrease in stirring and suction efficiency. By crushing, the coarse substances that may have been deposited are transformed into easily suspended fine particles, which continuously participate in the reaction under the action of circulation and stirring, reducing the generation of sediment at the bottom of the tank, thereby further improving the sewage treatment effect. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a cross-sectional view of the present invention;

[0025] Figure 3 This is a schematic diagram of the top structure of the support base of the present invention;

[0026] Figure 4 This is a schematic diagram of the fixed shell and guide shell structure of the present invention;

[0027] Figure 5 This is a cross-sectional view of the fixed shell and guide shell of the present invention;

[0028] Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle;

[0029] Figure 7 This is a schematic diagram of the inner structure of the fixing shell and the guiding shell of the present invention;

[0030] Figure 8 For the present invention Figure 7 Enlarged view at point B in the middle;

[0031] Figure 9 This is a schematic diagram of the pressing of two sets of crushing cones according to the present invention;

[0032] Figure 10 This is a cross-sectional view of the storage hopper and suspension seat of the present invention;

[0033] Figure 11 An exploded view of the pharmaceutical additive component of this invention.

[0034] In the diagram: 1. Reaction tank; 2. Support base; 3. Stirring rod; 4. First drive motor; 5. Conveying pump; 6. Fixed shell; 7. Guide shell; 8. First fixed shell; 9. Guide hole; 10. First guide pipe; 11. Drug delivery pipe; 12. Storage hopper; 13. Second guide pipe; 14. Second fixed shell; 15. Second drive motor; 16. First connecting spring; 17. Connecting block; 18. Traction rope; 19. Take-up roller; 20. Spherical rod; 21. Connecting plate; 22. Crushing cone; 23. Second connecting spring; 24. Cavity; 25. Moving block; 26. Arched block; 27. Suspension seat; 28. Third drive motor; 29. ​​Rotating rod; 30. Divider plate; 31. Discharge port. Detailed Implementation

[0035] 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.

[0036] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0037] Existing technologies typically rely solely on agitators for mechanical stirring, resulting in limited stirring range (especially at the bottom of the reaction tank where "dead zones" easily form). High concentrations of pollutants deposited at the bottom (such as particulate matter and heavy metals in phosphogypsum leachate) are difficult to agitate sufficiently. Furthermore, phosphogypsum leachate contains a large amount of high-density pollutants (such as phosphogypsum particles, heavy metal precipitates, and suspended solids), whose density is much greater than that of water, naturally exhibiting a tendency to settle due to gravity.

[0038] Existing technologies typically lack sufficient stirring intensity to completely counteract this settling tendency. During stirring, the upper layer of wastewater flows faster, temporarily dispersing pollutants; however, the lower layer flows slower, allowing pollutants to gradually settle to the bottom under gravity, forming a high-concentration accumulation. This results in uneven mixing of wastewater and chemicals. Therefore, this solution proposes the following technical improvements:

[0039] Please see Figures 1 to 11 This embodiment provides a phosphogypsum leachate treatment device, including: a reaction tank 1 and a support base 2 fixedly connected to the inner side of the reaction tank 1. A stirring rod 3 is rotatably connected to the inner side of the support base 2. A first drive motor 4 is installed on the top of the support base 2, and the output end of the first drive motor 4 is fixedly connected to the stirring rod 3. A suction auxiliary device is located inside the reaction tank 1 and is used to assist in pumping the sewage at the bottom of the reaction tank 1 to the top and mixing it with the reagent before discharge. The suction auxiliary device includes a fixed shell 6 fixedly connected to the bottom of the stirring rod 3. A guide shell 7 is slidably connected to the outer wall of the fixed shell 6. The suction auxiliary device also includes a first fixed shell 8 fixedly connected to the bottom of the support base 2. The first fixed shell 8 is rotatably connected to the stirring rod 3. A delivery pump 5 is installed on the top of the support base 2. A first guide pipe 10 is fixedly connected to the input end of the delivery pump 5, and one end of the first guide pipe 10 extends through the inner side of the first fixed shell 8. The output end of the delivery pump 5... A second guide pipe 13 is fixedly connected. A guide hole communicating with the fixed shell 6 is opened on the inner side of the stirring rod 3, and a guide hole 9 communicating with the inner guide hole is opened on the outer side of the stirring rod 3. A medicine adding component is provided on one side of the first fixed shell 8. The medicine adding component includes a suspension seat 27 fixedly connected to one side of the support seat 2. A storage hopper 12 is fixedly connected to the top of the suspension seat 27. A discharge port 31 penetrating to the bottom of the suspension seat 27 is opened on the inner side of the storage hopper 12. A medicine delivery pipe 11 is fixedly connected to the bottom of the discharge port 31. The medicine adding component also includes a rotating rod 29 rotatably connected to the inner side of the suspension seat 27. A plurality of partition plates 30 are fixedly connected to the outer wall of the rotating rod 29. The plurality of partition plates 30 are evenly distributed around the outer wall of the rotating rod 29. A third drive motor 28 is installed on one side of the suspension seat 27. The output end of the third drive motor 28 penetrates to the inner side of the suspension seat 27 and is fixedly connected to the rotating rod 29.

[0040] When the phosphogypsum leachate enters the inside of the reaction tank 1 and needs to be treated, the reagent is added to the inside of the reaction tank 1, and then the first drive motor 4 is started. The output end of the first drive motor 4 drives the stirring rod 3 to mix and stir the sewage and the reagent.

[0041] During the wastewater treatment process, the transfer pump 5 is started. The transfer pump 5 attempts to draw water from the inside of the guide shell 7 through the guide hole on the inner side of the stirring rod 3, allowing the wastewater at the bottom of the reaction tank 1 to flow into the first fixed shell 8 through the stirring rod 3 and be discharged from the top of the reaction tank 1 through the second guide pipe 13. During this process, the third drive motor 28 is started, and the output end of the third drive motor 28 drives the rotating rod 29 to rotate slowly. Thus, through multiple partition plates 30, the powdered agent inside the storage hopper 12 is intermittently transported through the delivery pipe 11 into the first fixed shell 8 to mix with the wastewater. Then, it is discharged back into the reaction tank 1 through the second guide pipe 13, forming a "bottom-top" circulation flow. This process can avoid localized sedimentation of wastewater at the bottom due to gravity. If the concentration is too high (or pollutants are concentrated), the unmixed wastewater at the top will come into contact with the wastewater circulating from the bottom again, making the wastewater concentration in the entire reaction tank more uniform. The reagent will be mixed after entering the first fixed shell with the circulating wastewater, and then discharged into the reaction tank from the top through the second guide pipe. This is equivalent to the reagent being added "dispersed" in the circulation flow, avoiding the problems of excessively high local reagent concentration (which may cause side reactions) or insufficient local treatment (incomplete treatment) caused by a large amount of reagent added at one time. At the same time, the pollutants deposited at the bottom are continuously carried into the circulation flow and fully mixed with the upper wastewater, ensuring that the wastewater in any area of ​​the reaction tank 1 (whether it is the upper or lower layer) can come into contact with the effective concentration of reagent, fundamentally eliminating the problem of "good treatment in the upper layer and high concentration in the lower layer", and further improving the mixing uniformity.

[0042] Please see Figures 4-7 A shrinkage adjuster, located between the fixed shell 6 and the guide shell 7, is used to adjust the position of the guide shell 7. The shrinkage adjuster includes two movable blocks 25 fixedly connected to the inner side of the guide shell 7. The outer wall of the fixed shell 6 is provided with guide grooves that match the movable blocks 25. The guide shell 7 is slidably connected to the fixed shell 6 through the two movable blocks 25 fixedly connected to the inner side. A first connecting spring 16 is installed between the movable blocks 25 and the guide groove. The shrinkage adjuster also includes connecting blocks 17 fixedly connected to the outer walls on both sides of the guide shell 7. A second fixed shell 14 is fixedly connected to the outer walls on both sides of the fixed shell 6. A second drive motor 15 is installed at one end of the second fixed shell 14. A take-up roller 19 is fixedly connected to the output end of the second drive motor 15. One end of the take-up roller 19 passes through the inner side of the second fixed shell 14 and is rotatably connected to the second fixed shell 14. A traction rope 18 is wound on the outer wall of the take-up roller 19. One end of the traction rope 18 is fixedly connected to the connecting block 17.

[0043] As wastewater enters the guide shell 7, the second drive motor 15 is activated. Under the control of the PLC controller, the output of the second drive motor 15 can rotate in both the forward and reverse directions. When the output of the second drive motor 15 rotates in the forward direction, it drives the winding roller 19 to wind up the traction rope 18, thereby causing the connecting block 17 to pull the guide shell 7 to move laterally. This adjusts the position of the suction port, thereby expanding the suction range and eliminating dead corners inside the reaction tank 1. This ensures that high-concentration wastewater at all locations at the bottom can be evenly drawn into the circulation system, further avoiding the problems of "local sedimentation and insufficient treatment," thus further improving the wastewater treatment effect.

[0044] Please see Figures 5-9 The extrusion auxiliary component, located inside the fixed shell 6, is used to crush particles or flocculent materials that enter the fixed shell 6. The extrusion auxiliary component includes a cavity 24 opened in the inner wall of the fixed shell 6. Two sets of connecting plates 21 are slidably connected to the inner side of the cavity 24. Each set of connecting plates 21 has two plates, and the two connecting plates 21 are symmetrically arranged about the central axis of the fixed shell 6. Multiple crushing cones 22 are fixedly connected to the inner side of each connecting plate 21. The crushing cones 22 between each two connecting plates 21 are staggered. A second connecting spring 23 is installed between the cavity 24 and the connecting plate 21. The extrusion auxiliary component also includes a ball rod 20 fixedly connected to one side of the connecting plate 21, and one end of the ball rod 20 extends to the outside of the fixed shell 6. Multiple arched blocks 26 are fixedly connected to the inner side of the guide shell 7. The multiple arched blocks 26 are evenly distributed on the inner side of the guide shell 7.

[0045] As the guide shell 7 moves toward the fixed shell 6, it drives the two sets of arched blocks 26 to move synchronously. When the lowest point of one inclined surface of the arched block 26 contacts the spherical rod 20, it pushes the spherical rod 20 through the connecting plate 21 to drive the crushing cone 22 toward the middle position of the fixed shell 6. Because the two sets of crushing cones 22 are symmetrically arranged and staggered, they can crush the flocculent material or solid impurities passing through the channel of the fixed shell 6. Since the pollutants inside the uncrushed coarse flocculent material or particles (such as phosphorus ions and heavy metals wrapped in flocculent material) are difficult to fully contact with the agent, the reaction will be incomplete, affecting the treatment effect. Therefore, by crushing, the coarse flocculent material is broken up and the solid particles are crushed, so that the surface of the pollutants is exposed. The surface area is significantly increased, and the fine particles after crushing can be more evenly dispersed in the wastewater under the action of circulation and agitation. They can fully collide and react with the agents (especially the powdered agents added through the delivery pipe 11), improving the conversion rate of pollutants (such as the precipitation rate of phosphorus and the removal rate of heavy metals), making the treatment more thorough. If coarse flocs or particles are not crushed, they are easy to redeposit to the bottom of the reaction tank under the action of gravity. Long-term accumulation will lead to a reduction in the effective volume of the tank bottom and a decrease in agitation and suction efficiency. By crushing, the coarse substances that may have been deposited are transformed into easily suspended fine particles, which continue to participate in the reaction under the action of circulation and agitation, reducing the generation of sediment at the bottom of the tank, thereby further improving the wastewater treatment effect.

[0046] The following describes a method for treating phosphogypsum leachate, based on the aforementioned phosphogypsum leachate treatment device, which specifically includes the following steps:

[0047] S1. When the phosphogypsum leachate enters the inside of the reaction tank 1 and needs to be treated, the agent is added to the inside of the reaction tank 1, and then the first drive motor 4 is started. The output end of the first drive motor 4 drives the stirring rod 3 to mix and stir the sewage and the agent.

[0048] S2. During the wastewater treatment process, the transfer pump 5 is started. The transfer pump 5 attempts to draw water from the inside of the guide shell 7 through the guide hole on the inside of the stirring rod 3, so that the wastewater at the bottom of the reaction tank 1 can flow into the first fixed shell 8 through the stirring rod 3 and be discharged from the top of the reaction tank 1 through the second guide pipe 13. During this process, the third drive motor 28 is started. The output end of the third drive motor 28 drives the rotating rod 29 to rotate slowly, so that the powdered agent inside the storage hopper 12 can be intermittently transported through the delivery pipe 11 to the inside of the first fixed shell 8 through multiple partition plates 30 to mix with the wastewater. Then, it is discharged back into the reaction tank 1 through the second guide pipe 13.

[0049] S3. When the sewage enters the guide shell 7, the second drive motor 15 is started. The output end of the second drive motor 15 can rotate in the forward and reverse directions under the control of the PLC controller. When the output end of the second drive motor 15 rotates in the forward direction, it drives the winding roller 19 to wind up the traction rope 18, thereby causing the connecting block 17 to pull the guide shell 7 to move laterally, thereby adjusting the position of the suction port.

[0050] S4. When the guide shell 7 moves toward the fixed shell 6, it drives the two sets of arched blocks 26 to move synchronously. When the lowest point of the inclined surface on one side of the arched block 26 contacts the spherical rod 20, it pushes the spherical rod 20 through the connecting plate 21 to drive the crushing cone 22 to move toward the middle position of the fixed shell 6. Since the two sets of crushing cones 22 are symmetrically arranged and staggered, they can crush the flocculent material or solid impurities in the channel of the fixed shell 6.

[0051] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for treating phosphogypsum leachate, characterized in that, include: The reaction tank (1) and the support base (2) fixedly connected to the inner side of the reaction tank (1) are provided with a stirring rod (3) rotatably connected to the inner side of the support base (2). A first drive motor (4) is installed on the top of the support base (2), and the output end of the first drive motor (4) is fixedly connected to the stirring rod (3). A suction aid is located inside the reaction tank (1) and is used to assist in pumping the sewage at the bottom of the reaction tank (1) to the top and mixing the agent for discharge. The suction aid includes a fixed shell (6) fixedly connected to the bottom of the stirring rod (3), and a guide shell (7) is slidably connected to the outer wall of the fixed shell (6). A shrinkage regulator is located between the fixed shell (6) and the guide shell (7) for adjusting the position of the guide shell (7); The extrusion aid is located inside the fixed shell (6) and is used to crush particles or flocculents that enter the inside of the fixed shell (6); The shrinkage regulator includes two movable blocks (25) fixedly connected to the inner side of the guide shell (7). The outer wall of the fixed shell (6) is provided with a guide groove that matches the movable blocks (25). The guide shell (7) is slidably connected to the fixed shell (6) through the two movable blocks (25) fixedly connected to the inner side. A first connecting spring (16) is installed between the movable blocks (25) and the guide groove. The shrinkage regulator also includes connecting blocks (17) fixedly connected to the outer walls on both sides of the guide shell (7). The outer walls on both sides of the fixed shell (6) are fixedly connected to a second fixed shell (14). A second drive motor (15) is installed at one end of the second fixed shell (14). A take-up roller (19) is fixedly connected to the output end of the second drive motor (15). One end of the take-up roller (19) extends through to the inner side of the second fixed shell (14) and is rotatably connected to the second fixed shell (14). A traction rope (18) is wound around the outer wall of the take-up roller (19). One end of the traction rope (18) is fixedly connected to the connecting block (17). The extrusion auxiliary component includes a cavity (24) formed in the inner wall of the fixed shell (6). Two sets of connecting plates (21) are slidably connected to the inner side of the cavity (24). Each set of connecting plates (21) has two plates, and the two connecting plates (21) are symmetrically arranged about the central axis of the fixed shell (6). Multiple crushing cones (22) are fixedly connected to the inner side of each connecting plate (21). The crushing cones (22) between every two connecting plates (21) are staggered. A second connecting spring (23) is installed between the cavity (24) and the connecting plate (21). The extrusion aid also includes a spherical rod (20) fixedly connected to one side of the connecting plate (21), and one end of the spherical rod (20) extends through to the outside of the fixed shell (6). A plurality of arched blocks (26) are fixedly connected to the inside of the guide shell (7), and the plurality of arched blocks (26) are evenly distributed on the inside of the guide shell (7).

2. The phosphogypsum leachate treatment device according to claim 1, characterized in that, The suction aid also includes a first fixed shell (8) fixedly connected to the bottom of the support base (2). The first fixed shell (8) is rotatably connected to the stirring rod (3). A delivery pump (5) is installed on the top of the support base (2). A first guide pipe (10) is fixedly connected to the input end of the delivery pump (5), and one end of the first guide pipe (10) extends through to the inner side of the first fixed shell (8). A second guide pipe (13) is fixedly connected to the output end of the delivery pump (5). A guide hole communicating with the fixed shell (6) is opened on the inner side of the stirring rod (3), and a guide hole (9) communicating with the inner guide hole is opened on the outer side of the stirring rod (3). A drug addition component is provided on one side of the first fixed shell (8).

3. The phosphogypsum leachate treatment device according to claim 2, characterized in that, The drug addition assembly includes a suspension seat (27) fixedly connected to one side of the support seat (2). A storage hopper (12) is fixedly connected to the top of the suspension seat (27). A discharge port (31) extending through to the bottom of the suspension seat (27) is opened on the inner side of the storage hopper (12). A drug delivery pipe (11) is fixedly connected to the bottom of the discharge port (31).

4. The phosphogypsum leachate treatment device according to claim 3, characterized in that, The drug addition assembly also includes a rotating rod (29) rotatably connected to the inner side of the suspension seat (27), and a plurality of partition plates (30) are fixedly connected to the outer wall of the rotating rod (29). The plurality of partition plates (30) are distributed at equal distances around the outer wall of the rotating rod (29). A third drive motor (28) is installed on one side of the suspension seat (27), and the output end of the third drive motor (28) extends through to the inner side of the suspension seat (27) and is fixedly connected to the rotating rod (29).

5. A method for treating phosphogypsum leachate, characterized in that, The apparatus for treating phosphogypsum leachate according to claim 4 includes the following steps: S1. When the phosphogypsum leachate enters the inside of the reaction tank (1) and needs to be treated, the agent is added to the inside of the reaction tank (1), and then the first drive motor (4) is started. The output end of the first drive motor (4) drives the stirring rod (3) to mix and stir the sewage and the agent. S2. During the sewage treatment process, the delivery pump (5) is started. The delivery pump (5) attempts to draw water from the inside of the guide shell (7) through the guide hole opened on the inside of the stirring rod (3), so that the sewage at the bottom of the reaction tank (1) can flow into the inside of the first fixed shell (8) through the stirring rod (3) and be discharged from the top of the reaction tank (1) through the second guide pipe (13). During this process, the third drive motor (28) is started. The output end of the third drive motor (28) drives the rotating rod (29) to rotate slowly. Thus, the powdered medicine inside the storage hopper (12) can be intermittently transported through the medicine delivery pipe (11) to the inside of the first fixed shell (8) to mix with the sewage through multiple partition plates (30). Then, it is discharged back into the reaction tank (1) through the second guide pipe (13). S3. When the sewage enters the interior of the guide shell (7), the second drive motor (15) is started. The output end of the second drive motor (15) can rotate in the forward direction and in the reverse direction under the control of the PLC controller. When the output end of the second drive motor (15) rotates in the forward direction, it drives the winding roller (19) to wind up the traction rope (18), thereby causing the connecting block (17) to pull the guide shell (7) to move laterally, thereby adjusting the position of the suction port. S4. When the guide shell (7) moves toward the fixed shell (6), it drives the two sets of arched blocks (26) to move synchronously. When the lowest point of the inclined surface on one side of the arched block (26) contacts the spherical rod (20), it pushes the spherical rod (20) through the connecting plate (21) to drive the crushing cone (22) to move toward the middle position of the fixed shell (6). Since the two sets of crushing cones (22) are symmetrically arranged and staggered, they can crush the flocculent material or solid impurities in the channel of the fixed shell (6).

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