A method and device for treating fluorine-containing wastewater

Abstract

The present invention discloses a method and device for treating fluorine-containing wastewater, which belongs to the technical field of wastewater treatment, wherein the fluorine-containing wastewater treatment device comprises a reaction chamber, a dispersion mechanism is arranged in the middle of the reaction chamber, the dispersion mechanism comprises an upper turntable and a lower turntable, the lower turntable is movably connected to the bottom of the upper turntable, a plurality of first mesh plates and blades are arranged on the upper circumference of the lower turntable, an air intake mechanism is arranged on the upper turntable and the lower turntable, and the air outlet nozzle is rotatably installed on the lower turntable. The invention generates shear force and driving force on the fluorine-containing wastewater by rotating the first mesh plate, so that the clumps are dispersed and the contact between the chemical reagent and the fluorine-containing wastewater is promoted. When the lower turntable moves upward, the air bag is squeezed, and the gas is sent out from the air outlet nozzle. The third gear moves upward, driving the rotating shaft and the ball joint to rotate, so that the air outlet nozzle rotates accordingly, so that the air outlet position gradually moves from the inside to the outside, thereby improving the uniformity of gas distribution and enabling the chemical reagent to contact the fluorine ions more evenly.

Description

Technical Field

[0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a method and device for treating fluorine-containing wastewater. Background Art

[0002] Chemical precipitation is a commonly used technology for treating fluoride-containing wastewater. Its basic principle is to add specific chemical reagents, such as calcium salts or aluminum salts, to the wastewater to react chemically with fluoride ions in the water to form insoluble fluoride precipitates. These precipitates can then be separated from the water by physical methods such as sedimentation and filtration, thereby achieving the purpose of removing fluoride. When treating, the fluoride-containing wastewater is first subjected to necessary pretreatment, such as adjusting the pH value and removing suspended matter, to improve the efficiency of subsequent treatment. Then, an appropriate amount of calcium salts (such as calcium chloride, calcium sulfate) or aluminum salts (such as aluminum sulfate, aluminum chloride) is added to the pretreated wastewater. These chemical reagents react with fluoride ions in the water to form calcium fluoride or aluminum fluoride precipitates. Under appropriate pH and temperature conditions, fluoride ions react with calcium ions or aluminum ions to form insoluble fluoride precipitates. The reaction equation is as follows: For calcium salts: Ca²⁺ + 2F⁻ → CaF 2 ↓, for aluminum salts: Al³⁺ + 3F⁻ → AlF 3 ↓. Sedimentation separation: The generated fluoride precipitate gradually settles to the bottom of the container under the action of gravity to form a sedimentation layer. Solid-liquid separation: The precipitate is separated from the supernatant by sedimentation, filtration and other methods to obtain treated water with low fluoride content and fluoride precipitate.

[0003] The viscosity of fluoride-containing wastewater depends on the type and concentration of fluoride dissolved therein, as well as the presence of other dissolved or suspended matter. High-viscosity fluoride-containing wastewater may contain high concentrations of fluoride, or other substances that increase viscosity, such as high molecular polymers, organic matter or inorganic salts. The problem with the prior art is that when treating fluoride-containing wastewater with high viscosity, it is critical to ensure that chemical reagents can be quickly and evenly distributed in the wastewater. However, due to the high viscosity, the chemical reagents are unevenly distributed or take a long time to diffuse completely, so the chance of contact with fluoride ions is reduced, resulting in slower treatment efficiency. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a fluorine-containing wastewater treatment device, which has the advantage of improving the mixing uniformity of fluorine-containing wastewater and chemical reagents, and solves the problems of the prior art.

[0005] The present invention is implemented as follows: a fluorine-containing wastewater treatment device includes a reaction chamber, a wastewater inlet and a chemical reagent inlet are arranged on the top of the reaction chamber, a dispersion mechanism is arranged in the middle of the reaction chamber, the dispersion mechanism includes an upper turntable and a lower turntable, the lower turntable is movably connected to the bottom of the upper turntable, a plurality of first mesh plates and blades are arranged on the circumference of the lower turntable, a plurality of inclined blocks are arranged on the circumference of the bottom wall of the reaction chamber, the first mesh plates are movably arranged on the inclined blocks, an air intake mechanism is arranged on the upper turntable and the lower turntable, the air intake mechanism includes a plurality of air bags, an air outlet nozzle is arranged at the bottom of the air bag, the air outlet nozzle is rotatably installed on the lower turntable, and the bottom is located below the lower turntable.

[0006] As a preferred embodiment of the present invention, the dispersion mechanism also includes a motor and a gear set, the gear set consists of a first gear and a second gear, the motor is fixedly mounted on the top of the reaction chamber, the first gear is fixedly mounted on the output shaft of the motor, and the second gear is meshed and connected to one side of the first gear.

[0007] As a preferred embodiment of the present invention, the air intake mechanism also includes an air intake pipe, the air intake end of the air intake pipe is connected to an external air pump, and a plurality of hoses are arranged around the air outlet end of the air intake pipe, and the plurality of hoses pass through the upper turntable and are connected to the top of the airbag.

[0008] As a preferred embodiment of the present invention, the upper end of the air intake pipe rotates and passes through the top of the reaction chamber, the bottom of the air intake pipe is fixedly installed in the middle of the upper surface of the upper turntable, and the tops of several air bags are fixedly connected to the lower surface of the upper turntable.

[0009] As a preferred embodiment of the present invention, a plurality of movable grooves are opened on the upper circumference of the lower turntable, and a fixing seat is fixedly connected to the upper surface of the lower turntable and on both sides of each movable groove, a supporting seat is fixedly installed on the fixing seat, and the bottom of the airbag is arranged inside the supporting seat.

[0010] As a preferred embodiment of the present invention, the bottom of the airbag is fixedly connected to a spherical joint, the connection between the bottom of the airbag and the spherical joint is made of flexible material, and the air outlet nozzle is fixedly connected to the bottom of the spherical joint.

[0011] As a preferred embodiment of the present invention, a rotating shaft is rotatably installed on the fixed seat, one end of the rotating shaft extends into the fixed seat and is fixedly connected to the ball joint, the other end of the rotating shaft is fixedly connected to a third gear, one side of the third gear is meshed with a rack, the top of the rack is fixedly connected to the lower surface of the upper rotating shaft, and the lower end slides through the lower turntable.

[0012] As a preferred embodiment of the present invention, a spring and a telescopic rod are fixedly connected to the middle of the lower surface of the upper turntable, the spring is sleeved outside the telescopic rod, the spring and the bottom of the telescopic rod are fixedly connected to a second mesh plate, and the outer peripheral surface of the second mesh plate is fixedly connected to the inner wall of the lower turntable.

[0013] As a preferred embodiment of the present invention, the upper end of the first mesh plate is fixedly connected to the lower surface of the lower turntable, and a roller is rotatably installed inside the lower end, the roller abuts against the inclined block, and the bottoms of several inclined blocks are fixedly installed on the bottom inner wall of the reaction chamber through the chassis, and the blades are fixedly installed on the outer side of the first mesh plate.

[0014] A method for treating fluorine-containing wastewater, comprising the fluorine-containing wastewater treatment device, comprises the following steps:

[0015] Fluorine-containing wastewater and chemical reagents are introduced into the reaction chamber through the wastewater inlet and the chemical reagent inlet respectively, and then the motor and the external air pump are started, the upper turntable and the lower turntable are driven to rotate by the motor, the lower turntable drives the first screen plate and the blades to rotate, the roller is intermittently in contact with the inclined block, and drives the lower turntable to move up and down reciprocatingly, so that the fluorine-containing wastewater in the fluorine-containing wastewater is evenly distributed;

[0016] The air pump draws external air into the air inlet pipe, disperses it into each air bag through several hoses, moves upward through the lower turntable, squeezes the air bag, and makes the internal gas form bubbles in the fluorine-containing wastewater. The rising bubbles drive the fluorine-containing wastewater to flow.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention arranges the first mesh plate on the circumference, which not only plays a connecting role between the roller, the blades and the lower turntable, but also drives the lower turntable to move up and down through the cooperation of the roller and the inclined block. When it rotates, it also generates shear force and driving force on the fluorine-containing wastewater passing through, so as to disperse the clumps and promote the contact between the chemical reagent and the fluorine-containing wastewater.

[0019] 2. The present invention allows gas to be introduced into the air inlet pipe through an external air pump, dispersed into each hose from the bottom of the air inlet pipe, and then transported to each air bag. When the lower turntable moves upward, the air bag is squeezed and the gas is sent out from the air outlet nozzle. During this process, the lower turntable drives the third gear to move upward. Through the engagement between the third gear and the rack, the third gear drives the rotating shaft and the ball joint to rotate, so that the air outlet nozzle rotates accordingly, and the air outlet position is gradually moved from the inside to the outside, thereby improving the uniformity of gas distribution and allowing the chemical reagents to be more evenly exposed to nutrients and oxygen. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall cross-sectional three-dimensional structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the top view of the structure of the present invention;

[0022] Figure 3 For the present invention Figure 2 Schematic diagram of the three-dimensional structure of the middle AA section;

[0023] Figure 4 For the present invention Figure 3 A magnified view of the structure at C in the middle;

[0024] Figure 5 For the present invention Figure 2 Schematic diagram of the three-dimensional structure of the middle BB section;

[0025] Figure 6 It is a schematic diagram of the local three-dimensional structure of the present invention.

[0026] In the figure: 1. reaction chamber; 2. dispersion mechanism; 21. upper turntable; 22. lower turntable; 221. movable groove; 23. motor; 24. first gear; 25. second gear; 26. telescopic rod; 27. spring; 28. first mesh plate; 29. ​​roller; 210. blade; 211. chassis; 212. inclined block; 213. second mesh plate; 3. air intake mechanism; 31. air intake pipe; 32. hose; 33. air bag; 331. ball joint; 332. air outlet nozzle; 34. supporting seat; 35. rack; 36. third gear; 37. rotating shaft; 38. fixed seat; 4. wastewater inlet; 5. chemical reagent inlet. DETAILED DESCRIPTION

[0027] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0028] The structure of the present invention is described in detail below in conjunction with the accompanying drawings.

[0029] like Figures 1 to 6 As shown, the fluorine-containing wastewater treatment device provided by the embodiment of the present invention includes a reaction chamber 1, a wastewater inlet 4 and a chemical reagent inlet 5 are arranged on the top of the reaction chamber 1, a dispersion mechanism 2 is arranged in the middle of the reaction chamber 1, the dispersion mechanism 2 includes an upper turntable 21 and a lower turntable 22, the lower turntable 22 is movably connected to the bottom of the upper turntable 21, a plurality of first mesh plates 28 and blades 210 are arranged on the circumference of the lower turntable 22, a plurality of inclined blocks 212 are arranged on the circumference of the bottom wall of the reaction chamber 1, the first mesh plates 28 are movably arranged on the inclined blocks 212, an air intake mechanism 3 is arranged on the upper turntable 21 and the lower turntable 22, the air intake mechanism 3 includes a plurality of air bags 33, an air outlet nozzle 332 is arranged at the bottom of the air bag 33, the air outlet nozzle 332 is rotatably installed on the lower turntable 22, and the bottom is located below the lower turntable 22.

[0030] Furthermore, the dispersion mechanism 2 also includes a motor 23 and a gear set, the gear set consists of a first gear 24 and a second gear 25, the motor 23 is fixedly installed on the top of the reaction chamber 1, the first gear 24 is fixedly installed on the output shaft of the motor 23, and the second gear 25 is meshed and connected to one side of the first gear 24.

[0031] Specifically, the wastewater inlet 4 and the chemical reagent inlet 5 are used to pass the fluorine-containing wastewater and the chemical reagent into the reaction chamber 1, respectively. After passing, the chemical reagent is quickly and evenly distributed in the fluorine-containing wastewater through the dispersion mechanism 2. At the same time, oxygen or air is supplied through the air intake mechanism 3. In the process of treating fluorine-containing wastewater by chemical precipitation method, the injected gas can play a role in stirring and promoting the sedimentation of the precipitate. By injecting air or oxygen into the wastewater, the oxygen content in the water can be increased, which is conducive to the redox reaction. At the same time, the flow of gas can break the agglomeration of the precipitate and make it more dispersed, thereby improving the precipitation efficiency. In addition, the stirring action of the gas can also prevent the precipitate from depositing on the reactor wall, ensuring that the reaction is more uniform and effective. Further, the device is suitable for the treatment of fluorine-containing wastewater with high viscosity. It should be noted that the reaction chamber 1 is also provided with a drain port and a miscellaneous discharge port (not shown in the figure), which are used to discharge the treated wastewater and precipitate respectively.

[0032] Among them, the first gear 24 and the second gear 25 form a reduction gear set, which drives the upper turntable 21 and the lower turntable 22 to rotate, which can meet the demand for low-speed stirring during the treatment of fluorine-containing wastewater (when the speed is reduced to a certain level, it will not hinder the precipitation of sediment), increase the torque, and provide sufficient power for the rotation of the blades 210, the first mesh plate 28, the lower turntable 22, and the up and down movement of the lower turntable.

[0033] As a preferred embodiment of the present invention, the air intake mechanism 3 also includes an air intake pipe 31, the air intake end of the air intake pipe 31 is connected to an external air pump, a plurality of hoses 32 are arranged around the air outlet end of the air intake pipe 31, the plurality of hoses 32 penetrate the upper turntable 21, and are connected to the top of the airbag 33, the upper end of the air intake pipe 31 rotates and penetrates the top of the reaction chamber 1, the bottom of the air intake pipe 31 is fixedly installed in the middle of the upper surface of the upper turntable 21, the tops of the plurality of airbags 33 are fixedly connected to the lower surface of the upper turntable 21, a plurality of movable grooves 221 are opened around the upper circumference of the lower turntable 22, a fixed seat 38 is fixedly connected to the upper surface of the lower turntable 22 and located on both sides of each movable groove 221, and a fixed seat 38 is fixed on the fixed seat 38 A supporting seat 34 is fixedly installed, and the bottom of the airbag 33 is arranged inside the supporting seat 34. A spherical joint 331 is fixedly connected to the bottom of the airbag 33. The connection between the bottom of the airbag 33 and the spherical joint 331 is made of flexible material. The air outlet nozzle 332 is fixedly connected to the bottom of the spherical joint 331. A rotating shaft 37 is rotatably installed on the fixed seat 38. One end of the rotating shaft 37 extends into the fixed seat 38 and is fixedly connected to the spherical joint 331. The other end of the rotating shaft 37 is fixedly connected to a third gear 36. A rack 35 is meshedly connected to one side of the third gear 36. The top of the rack 35 is fixedly connected to the lower surface of the upper rotating shaft 37, and the lower end slides through the lower turntable 22.

[0034] Specifically, the airbag 33 is circumferentially arranged between the upper turntable 21 and the lower turntable 22, and the ball joint 331 and the air outlet nozzle 332 at the bottom can rotate in the movable groove 221 to change the air outlet position. The ball joint 331 is rotatably installed inside the lower end of the supporting seat 34. By setting the bottom of the airbag 33 in the supporting seat 34, on the one hand, the airbag 33 can be protected to avoid dislocation of the airbag 33 when the airbag 33 is squeezed, thereby improving the stability of the airbag 33. On the other hand, it can support and limit the air outlet nozzle 332, improve the strength and stability of the ball joint 331 and the air outlet nozzle 332, and ensure the reliability of the air outlet adjustment operation. In addition, it can also play a role in installing and supporting the rotating shaft 37.

[0035] During operation, the external air pump passes the gas into the air inlet pipe 31, which is dispersed into each hose 32 from the bottom of the air inlet pipe 31, and then transported to each air bag 33. When the lower turntable 22 moves upward, it squeezes the air bag 33, and the gas is sent out from the air outlet nozzle 332. During this process, the lower turntable 22 drives the third gear 36 to move upward. Through the engagement between the third gear 36 and the rack 35, the third gear 36 drives the rotating shaft 37 and the ball joint 331 to rotate, so that the air outlet nozzle 332 rotates accordingly, so that the air outlet position gradually moves from the inside to the outside, thereby improving the uniformity of gas distribution.

[0036] It should be noted that the rack 35 not only drives the third gear 36 to rotate, but also plays a guiding and limiting role in the up and down movement of the lower turntable 22, thereby improving the stability of the lower turntable 22 during movement, thereby improving the reliability of the device operation.

[0037] Furthermore, a spring 27 and a telescopic rod 26 are fixedly connected to the middle of the lower surface of the upper turntable 21, and the spring 27 is sleeved outside the telescopic rod 26. The second mesh plate 213 is fixedly connected to the bottom of the spring 27 and the telescopic rod 26. The outer peripheral surface of the second mesh plate 213 is fixedly connected to the inner wall of the lower turntable 22. The upper end of the first mesh plate 28 is fixedly connected to the lower surface of the lower turntable 22, and a roller 29 is rotatably installed inside the lower end. The roller 29 abuts against the inclined block 212. The bottoms of several inclined blocks 212 are fixedly installed on the bottom inner wall of the reaction chamber 1 through the chassis 211, and the blades 210 are fixedly installed on the outer surface of the first mesh plate 28.

[0038] Specifically, by setting a second mesh plate 213 inside the lower turntable 22, when it moves upward, it squeezes the culture solution above to diffuse it to the surroundings. When it moves downward, a low-pressure area is formed below, which attracts the surrounding fluorine-containing wastewater to flow in, so that the fluorine-containing wastewater is continuously circulated in the vertical direction, enhancing the mixing of substances in the vertical direction without hindering the diffusion of gases.

[0039] By arranging the first mesh plate 28 in a circle, the blades 210 and the rollers 29 can be connected to the lower turntable 22, so that the lower turntable 22 can be driven to move up and down. When the lower turntable 22 rotates, shear force and driving force are generated on the fluorine-containing wastewater passing through, so that larger sediment agglomerates are dispersed, and the contact between chemical reagents and fluoride ions is promoted.

[0040] During operation, the upper turntable 21 and the lower turntable 22 are driven to rotate by the motor 23, and the lower turntable 22 drives the blades 210, the first mesh plate 28 and the roller 29 to rotate synchronously, and the roller 29 rolls along the surface of the bottom plate 211. When it moves to the inclined block 212, the roller 29 drives the first mesh plate 28 and the lower turntable 22 to move upward, so that the spring 27 contracts, the airbag 33 is compressed, and the gas is released. When the roller 29 is separated from the inclined block 212, the lower turntable 22 moves downward under the elastic force of the spring 27 and continues to rotate to achieve up and down reciprocating movement, so that the fluorine-containing wastewater and the chemical reagent move up and down, rotate and move, and the gas flows from the inside to the outside, which enhances the mixing effect, is conducive to the full contact between the chemical reagent and the fluorine-containing wastewater and oxygen, and ensures that the chemical reagent can be evenly distributed in the fluorine-containing wastewater.

[0041] like Figure 1-Figure 6 As shown, the method for using the fluorine-containing wastewater treatment device provided in the embodiment of the present invention comprises the following steps:

[0042] Fluorine-containing wastewater and chemical reagents are introduced into the reaction chamber 1 through the wastewater inlet 4 and the chemical reagent inlet 5, respectively, and then the motor 23 and the external air pump are started, and the upper turntable 21 and the lower turntable 22 are driven to rotate by the motor 23, and the lower turntable 22 drives the first mesh plate 28 and the blades 210 to rotate, and the roller 29 is intermittently in contact with the inclined block 212, and drives the lower turntable 22 to move up and down reciprocatingly, so that the fluorine-containing wastewater in the fluorine-containing wastewater is evenly distributed, and it is ensured that the chemical reagents can be evenly distributed in various positions of the fluorine-containing wastewater;

[0043] The air pump draws external air into the air inlet pipe 31, disperses it into each air bag 33 through a plurality of hoses 32, and moves upward through the lower turntable 22 to squeeze the air bag 33, so that the internal gas forms bubbles in the fluorine-containing wastewater. The rising bubbles drive the fluorine-containing wastewater to flow, which not only plays a certain stirring role, but also promotes the mixing of fluorine ions, chemical reagents and gases in the fluorine-containing wastewater;

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0045] 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 fluorine-containing wastewater treatment device, comprising a reaction chamber (1), wherein the top of the reaction chamber (1) is provided with a wastewater inlet (4) and a chemical reagent inlet (5), Features: A dispersion mechanism (2) is arranged in the middle of the reaction chamber (1), the dispersion mechanism (2) comprising an upper rotating disk (21) and a lower rotating disk (22), the lower rotating disk (22) being movably connected to the bottom of the upper rotating disk (21), a plurality of first mesh plates (28) and blades (210) being arranged on the upper circumference of the lower rotating disk (22), a plurality of inclined blocks (212) being arranged on the upper circumference of the bottom wall of the reaction chamber (1), the first mesh plates (28) being movably arranged on the inclined blocks (212), an air intake mechanism (3) being arranged on the upper rotating disk (21) and the lower rotating disk (22), the air intake mechanism (3) comprising a plurality of air bags (33), an air outlet nozzle (332) being arranged at the bottom of the air bag (33), the air outlet nozzle (332) being rotatably mounted on the lower rotating disk (22), and the bottom of the air outlet nozzle (332) being located below the lower rotating disk (22); The lower turntable (22) is provided with a plurality of movable grooves (221) on its upper circumference, a fixing seat (38) is fixedly connected to the upper surface of the lower turntable (22) and located on both sides of each movable groove (221), a supporting seat (34) is fixedly mounted on the fixing seat (38), and the bottom of the airbag (33) is arranged inside the supporting seat (34); The bottom of the airbag (33) is fixedly connected to a spherical joint (331); the connection between the bottom of the airbag (33) and the spherical joint (331) is made of a flexible material; and the air outlet nozzle (332) is fixedly connected to the bottom of the spherical joint (331); The upper end of the first mesh plate (28) is fixedly connected to the lower surface of the lower turntable (22), and a roller (29) is rotatably mounted inside the lower end, the roller (29) abuts against the inclined block (212), and the bottoms of a plurality of the inclined blocks (212) are fixedly mounted on the bottom inner wall of the reaction chamber (1) through a bottom plate (211), and the blades (210) are fixedly mounted on the outer surface of the first mesh plate (28).

2. The fluorine-containing wastewater treatment device according to claim 1, Features: The dispersion mechanism (2) further comprises a motor (23) and a gear set, wherein the gear set comprises a first gear (24) and a second gear (25), wherein the motor (23) is fixedly mounted on the top of the reaction chamber (1), the first gear (24) is fixedly mounted on the output shaft of the motor (23), and the second gear (25) is meshingly connected to one side of the first gear (24).

3. The fluorine-containing wastewater treatment device according to claim 1, Features: The air intake mechanism (3) further comprises an air intake pipe (31), the air intake end of the air intake pipe (31) being connected to an external air pump, and a plurality of hoses (32) being arranged around the air outlet end of the air intake pipe (31), the plurality of hoses (32) passing through the upper rotating disk (21) and being in communication with the top of the air bag (33).

4. The fluorine-containing wastewater treatment device according to claim 3, Features: The upper end of the air inlet pipe (31) rotates and penetrates the top of the reaction chamber (1); the bottom of the air inlet pipe (31) is fixedly mounted on the middle of the upper surface of the upper turntable (21); and the tops of a plurality of air bags (33) are fixedly connected to the lower surface of the upper turntable (21).

5. The fluorine-containing wastewater treatment device according to claim 1, Features: A rotating shaft (37) is rotatably mounted on the fixing seat (38), one end of the rotating shaft (37) extends into the fixing seat (38) and is fixedly connected to the ball joint (331), the other end of the rotating shaft (37) is fixedly connected to a third gear (36), one side of the third gear (36) is meshingly connected to a rack (35), the top of the rack (35) is fixedly connected to the lower surface of the upper rotating shaft (37), and the lower end slides through the lower rotating disk (22).

6. The fluorine-containing wastewater treatment device according to claim 1, Features: A spring (27) and a telescopic rod (26) are fixedly connected in the middle of the lower surface of the upper turntable (21); the spring (27) is sleeved outside the telescopic rod (26); a second mesh plate (213) is fixedly connected at the bottom of the spring (27) and the telescopic rod (26); and the outer peripheral surface of the second mesh plate (213) is fixedly connected to the inner wall of the lower turntable (22).

7. A method for treating fluoride-containing wastewater, Features: Using the fluorine-containing wastewater treatment device according to any one of claims 1 to 6 comprises the following steps: Fluorine-containing wastewater and chemical reagents are introduced into the reaction chamber (1) through the wastewater inlet (4) and the chemical reagent inlet (5), respectively, and then the motor (23) and the external air pump are started, the upper turntable (21) and the lower turntable (22) are driven to rotate by the motor (23), the lower turntable (22) drives the first screen plate (28) and the blades (210) to rotate, the roller (29) intermittently contacts the inclined block (212), and drives the lower turntable (22) to move up and down reciprocatingly, so that the fluorine-containing wastewater in the fluorine-containing wastewater is evenly distributed; The air pump draws external air into the air inlet pipe (31), disperses it into the air bags (33) through a plurality of hoses (32), moves upward through the lower turntable (22), squeezes the air bags (33), and forms bubbles in the internal gas in the fluorine-containing wastewater. The rising bubbles drive the fluorine-containing wastewater to flow.

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