A device for removing fluorine from wastewater

Abstract

The utility model discloses a wastewater defluorination device relates to wastewater treatment technical field, the utility model discloses a base is equipped with the defluorination cylinder on the top of base, the top of defluorination cylinder is connected with the sealing cover, the bottom of defluorination cylinder is installed with second motor, and the output of second motor is connected with the stirring shaft, and the outer surface of stirring shaft is fixed with the stirring vane, the utility model discloses a turnover shaft, overturns the board, the driving cone and the driven cone, after the cloth is finished, because partial powder medicine specific gravity is lighter, easily floats on the water surface, influences the reaction efficiency, second motor rotates to make the driving axle rotate to make the stirring vane and the driving cone rotate, and the driving cone rotation can make the turnover shaft and overturn the board rotate, and overturn the board rotation can be up and down to the wastewater of overturning and stirring, and then can be pressed into wastewater on the surface of wastewater agent and lime, and the collision probability of reinforcing agent particle and fluoride ion is accelerated, and the reaction speed is accelerated.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a wastewater defluoridation device. Background Technology

[0002] Industries such as chemical, electrolysis, and electronic component manufacturing generate large amounts of industrial wastewater during production. This wastewater has a high fluoride content, and if it is discharged without treatment or with substandard treatment, it will cause great pollution to the environment.

[0003] Existing technology discloses a wastewater deep defluorination device with patent number CN220999320U. This utility model facilitates the even distribution of lime and other substances into wastewater through a feeding mechanism, and then removes fluorides from the wastewater through a defluorination mechanism, thus completing the feeding and defluorination operations. However, in practical applications, lime and other reagents are prone to caking during storage and transportation due to factors such as humidity changes and pressure buildup. Caking of the reagents forms a blocky structure, which significantly reduces the contact area with wastewater and the dissolution rate, thereby prolonging the fluoride reaction time and reducing the defluorination efficiency. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a wastewater defluoridation device to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a wastewater defluorination device, comprising a base, a defluorination cylinder on the top of the base, a sealing cover connected to the top of the defluorination cylinder, a second motor installed at the bottom of the defluorination cylinder, an agitator shaft connected to the output end of the second motor, a stirring blade fixed to the outer surface of the stirring shaft, and a driving conical tooth fixed to the top of the stirring shaft, a tilting shaft installed inside the defluorination cylinder, and a tilting plate and a driven conical tooth fixed to the outer surface of the tilting shaft respectively; a water inlet pipe penetrating one side of the top of the sealing cover, and a feeding assembly provided in the middle of the top of the sealing cover.

[0006] Furthermore, the feeding assembly includes a feeding cylinder extending through the top of the sealing cover. A first motor is installed on the top of the feeding cylinder, and a drive shaft is connected to the output end of the first motor. A crushing roller is fixed on the outer surface of the drive shaft. A receiving hopper is welded to the bottom end of the drive shaft through a fixing rod, and a feeding pipe extends through the bottom of the receiving hopper. A feeding port is provided on one side of the feeding cylinder.

[0007] By adopting the above technical solution, the first motor drive shaft drives the crushing roller to rotate, which, in conjunction with the inner wall of the feeding cylinder, crushes the caking agent. Then, the rotation of the receiving hopper and the feeding pipe achieves uniform distribution of the agent. This structure effectively solves the problems of slow dissolution and incomplete reaction caused by agent caking in traditional devices.

[0008] Furthermore, a slip ring is fixed to the outer surface of the receiving hopper, and a slide rail is fixed to the bottom of the sealing cover, with the receiving hopper slidingly engaged with the slide rail via the slip ring.

[0009] By adopting the above technical solution, when the drive shaft drives the receiving hopper to rotate, the slip ring rolls on the slide rail to form a low-friction support, ensuring that the receiving hopper rotates smoothly.

[0010] Furthermore, a water pumping pipe and a slag discharge port are respectively provided on one side of the defluorination cylinder, and the lower part of the interior of the defluorination cylinder is inclined along the direction of the slag discharge port.

[0011] By adopting the above technical solution, the design allows the CaF2 precipitate generated by the reaction to automatically slide down the slope to the slag discharge port under the action of gravity. At the same time, the water pumping pipe is set at a higher position (5-10cm above the lowest end of the inclined surface), which can effectively extract the upper clear liquid and prevent the precipitate from being sucked in, thus ensuring the quality of the effluent and facilitating regular slag discharge.

[0012] Furthermore, a clean water pipe extends through the upper side of the other side of the defluorination cylinder.

[0013] By adopting the above technical solution, a flushing water flow is formed by injecting clean water. This design utilizes the diagonal layout of the clean water pipe and the slag discharge port, combined with the inclined guide slope inside the defluorination cylinder, so that the water flow accelerates along the slope under the action of gravity, flushing the CaF2 precipitate deposited at the bottom to the slag discharge port, shortening the slag discharge time and improving the removal rate of precipitate.

[0014] Furthermore, a sealing box is fixed inside the defluorination cartridge via a connecting rod, and both the active and driven conical teeth are located inside the sealing box, with the top of the sealing box being conical.

[0015] By adopting the above technical solution, the design allows the drug particles to slide along the conical surface to both sides when falling, avoiding accumulation on the top of the sealed box. At the same time, the sealed box adopts a fully enclosed structure, filled with lubricating grease and isolated from wastewater corrosion by a skeleton oil seal, ensuring the transmission efficiency of the bevel gear set. This effectively solves the problems of easy corrosion and jamming of traditional open gears and ensures the stable operation of the dual-shaft stirring system.

[0016] Furthermore, the stirring blades are arranged in several groups from top to bottom, and the outer surface of the several groups of stirring blades has multiple through holes.

[0017] By adopting the above technical solution, this design enables the water flow to form turbulence on the blade surface during the stirring process. The jet generated at the through hole enhances the micro-mixing effect of the agent and wastewater. Compared with traditional solid blades, this design improves the mixing uniformity and reduces power consumption.

[0018] Furthermore, an observation window is provided in the middle of the outer surface of the defluorination cylinder.

[0019] By adopting the above technical solution, operators can monitor the CaF2 crystal growth status through a visual window to understand the working status of the equipment.

[0020] Furthermore, a control panel is installed on the outer surface of the defluorination cylinder, and both the first motor and the second motor are electrically connected to the control panel.

[0021] By adopting the above technical solution, staff can control the first and second motors through the control panel and set the motor speeds independently.

[0022] In summary, the present invention has the following main advantages:

[0023] 1. This utility model, through the setting of the feeding assembly, allows workers to feed lime and other agents into the lower cylinder through the feeding port. The first motor drives the drive shaft to rotate, causing the coaxially fixed crushing roller to operate synchronously. The inner wall of the feeding cylinder adopts a tapered design that gradually narrows from top to bottom (forming a crushing chamber that is wider at the top and narrower at the bottom). The gap (2-5mm) between the outer wall of the crushing roller and the cylinder wall decreases with height, achieving a stepped crushing of caking agents from coarse to fine: the larger gap at the top initially breaks up the lumps, while the smaller gap at the bottom refines the particles. The crushed reagent particles (particle size ≤ 3 mm, dispersion ≥ 90%) fall freely into the receiving hopper, which is rigidly connected to the lower end of the drive shaft via a fixed rod. The hopper moves in a circular motion with the drive shaft, and the distribution pipe at the bottom of the hopper evenly distributes the reagent into the wastewater reaction zone inside the defluorination cylinder in a radial diffusion trajectory. This solves the problems of low dissolution rate and insufficient reaction caused by reagent caking in traditional devices, ensuring that the crushed reagent particles are quickly and evenly mixed and reacted with the wastewater, significantly shortening the defluorination reaction time.

[0024] 2. This utility model, through a flipping shaft, a stirring plate, an active conical tooth, and a driven conical tooth, addresses the issue that after the material is applied, some powdered agents, being relatively light, tend to float on the water surface, affecting reaction efficiency. At this point, the rotation of the second motor causes the drive shaft to rotate, which in turn causes the stirring blades and the active conical tooth to rotate. The rotation of the active conical tooth enables the flipping shaft and the stirring plate to rotate, and the rotation of the stirring plate stirs the wastewater up and down, thereby pressing the agents and lime floating on the surface of the wastewater into the wastewater, increasing the collision probability between the agent particles and fluoride ions, and accelerating the reaction speed. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the cross-sectional structure of the defluorination cylinder of this utility model;

[0027] Figure 3 This is a schematic diagram of the crushing roller structure of this utility model;

[0028] Figure 4 This is a schematic diagram of the sealing box structure of this utility model;

[0029] Figure 5 This is a schematic diagram of the stirring blade and tumbling plate structure of this utility model.

[0030] In the diagram: 1. Base; 2. Defluorination cylinder; 3. Sealing cover; 4. Feeding assembly; 401. Feeding cylinder; 402. First motor; 403. Drive shaft; 404. Crushing roller; 405. Slide rail; 406. Fixing rod; 407. Feeding hopper; 408. Distribution pipe; 409. Slip ring; 410. Feeding port; 5. Water inlet pipe; 6. Observation window; 7. Control panel; 8. Slag discharge port; 9. Water pumping pipe; 10. Clean water pipe; 11. Sealing box; 12. Tilting shaft; 13. Tilting plate; 14. Second motor; 15. Stirring shaft; 16. Stirring blade; 17. Connecting rod; 18. Active bevel gear; 19. Driven bevel gear. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0032] The embodiments of this utility model will be described below based on its overall structure.

[0033] Example 1: A wastewater defluoridation device, such as Figures 1-5As shown, the system includes a base 1, with a defluorination cylinder 2 on top of the base 1. An observation window 6 is located in the middle of the outer surface of the defluorination cylinder 2, allowing operators to monitor the CaF2 crystal growth state and understand the equipment's operating status. A sealing cover 3 is connected to the top of the defluorination cylinder 2. A second motor 14 is installed at the bottom of the defluorination cylinder 2, with a stirring shaft 15 connected to its output end. Stirring blades 16 are fixed to the outer surface of the stirring shaft 15, and a driving conical tooth 18 is fixed to its top. A tilting shaft 12 is installed inside the defluorination cylinder 2, with a stirring plate 13 and a driven conical tooth 19 fixed to its outer surface. A water inlet pipe 5 passes through one side of the top of the sealing cover 3, and a feeding assembly 4 is located in the middle of the top of the sealing cover 3. Component 4 includes a feeding cylinder 401 extending through the top of the sealing cover 3. A first motor 402 is mounted on the top of the feeding cylinder 401. The output end of the first motor 402 is connected to a drive shaft 403. A crushing roller 404 is fixed to the outer surface of the drive shaft 403. A receiving hopper 407 is welded to the bottom end of the drive shaft 403 via a fixing rod 406. A distribution pipe 408 extends through the bottom of the receiving hopper 407. A feeding port 410 is provided on one side of the feeding cylinder 401. The first motor 402 drives the drive shaft 403 to rotate the crushing roller 404, which, in conjunction with the inner wall of the feeding cylinder 401, crushes the caking agent. The rotation of the receiving hopper 407 and the distribution pipe 408 then achieves uniform distribution of the agent. This structure effectively solves the problems of slow dissolution and incomplete reaction caused by agent caking in traditional devices.

[0034] See Figures 1-2 In the above embodiment, a water pumping pipe 9 and a slag discharge port 8 are respectively provided on one side of the defluorination cylinder 2. The interior of the defluorination cylinder 2 is inclined along the direction of the slag discharge port 8. This design allows the CaF2 precipitate generated by the reaction to automatically slide down the inclined surface to the slag discharge port 8 under the action of gravity. At the same time, the water pumping pipe 9 is set at a higher position (5-10cm higher than the lowest end of the inclined surface), which can effectively extract the upper clear liquid and prevent the precipitate from being sucked in, thus ensuring the quality of the effluent and facilitating regular slag discharge.

[0035] See Figure 2 In the above embodiment, a clean water pipe 10 is inserted through the other side of the defluorination cylinder 2, and a flushing water flow is formed by injecting clean water. This design utilizes the diagonal layout of the clean water pipe 10 and the slag discharge port 8, combined with the inclined guide slope inside the defluorination cylinder 2, so that the water flow accelerates along the slope under the action of gravity, and washes the CaF2 precipitate deposited at the bottom to the slag discharge port 8, shortening the slag discharge time and improving the removal rate of precipitate.

[0036] See Figure 2 and Figure 4In the above embodiment, the defluorination cylinder 2 is fixed with a sealing box 11 inside by a connecting rod 17, and the active bevel gear 18 and the driven bevel gear 19 are both located inside the sealing box 11. The top of the sealing box is cone-shaped. This design allows the reagent particles to slide down the cone surface to both sides when they fall, avoiding accumulation on the top of the sealing box 11. At the same time, the sealing box 11 adopts a fully enclosed structure, and is filled with grease and isolated from wastewater corrosion by a skeleton oil seal, ensuring the transmission efficiency of the bevel gear set. This effectively solves the problem of easy corrosion and jamming of traditional open gears and ensures the stable operation of the dual-shaft stirring system.

[0037] See Figure 2 and Figure 5 In the above embodiment, the stirring blades 16 are arranged in several groups from top to bottom, and the outer surface of the several groups of stirring blades 16 is perforated with multiple through holes. This design makes the water flow form turbulence on the surface of the blades during the stirring process. The jet generated at the through holes enhances the micro-mixing effect of the agent and wastewater. Compared with traditional solid blades, it improves the mixing uniformity and reduces power consumption.

[0038] See Figure 1 In the above embodiment, the outer surface of the defluorination cylinder 2 is equipped with a control panel 7, and the first motor 402 and the second motor 14 are both electrically connected to the control panel 7. The operator can control the first motor 402 and the second motor 14 through the control panel 7 and can independently set the motor speed.

[0039] Example 2: To make the rotation of the receiving hopper more stable, Example 2 is an improvement on Example 1. (See attached document for details.) Figure 2 and Figure 3 The outer surface of the receiving hopper 407 is fixed with a slip ring 409, and the bottom of the sealing cover 3 is fixed with a slide rail 405. The receiving hopper 407 slides with the slide rail 405 through the slip ring 409. When the drive shaft 403 drives the receiving hopper 407 to rotate, the slip ring 409 rolls on the slide rail 405 to form a low-friction support, ensuring that the receiving hopper 407 rotates smoothly.

[0040] The implementation principle of this utility model is as follows: During operation, the operator first pumps fluoride-containing wastewater into the defluorination cylinder 2 through the inlet pipe 5. Then, lime, precipitant, disodium hydrogen phosphate, and phosphate rock powder are added to the feeding cylinder 401 through the feeding port 410. Subsequently, the first motor 402 is started. The rotation of the first motor 402 causes the drive shaft 403 to rotate, which synchronously drives the crushing roller 404 to crush the caking agent to a particle size ≤1mm. At the same time, the receiving hopper 407 rotates with the drive shaft 403, and the outer surface slip ring 409 rolls with low friction on the bottom slide rail 405 of the sealing cover 3, so that the bottom distribution pipe 408 evenly spreads the crushed agent to the reaction zone in a radial diffusion trajectory. While the material is being distributed, the operator starts the second motor 402. Motor 14 drives the stirring shaft 15 to rotate, causing the stirring blades 16 to form a horizontal circulation. Simultaneously, the active bevel teeth 18 at the top of the stirring shaft 15 mesh with the driven bevel teeth 19, driving the tilting shaft 12 and the tumbling plate 13 to rotate at high speed. As the tumbling plate 13 rotates, it tumbles the wastewater up and down, thus forcing light chemicals (such as lime powder) floating on the wastewater surface into the interior of the wastewater. This, combined with the horizontal flow field formed by the stirring blades 16, enhances the mixing effect between the chemicals and the wastewater. During this process, lime reacts with water to generate Ca(OH)2, dissociating OH- and increasing the pH value of the wastewater. Disodium hydrogen phosphate (Na2HPO4) dissolves and releases HPO42-, which reacts with H+ in the water... + The hydrolysis equilibrium reaction of OH- ions, combined with the weak neutralizing effect of calcium carbonate in the phosphate rock powder, stabilizes the wastewater pH within the optimal defluorination reaction range of 6.5-7.0. The phosphate rock powder, acting as a natural seed crystal, accelerates the reaction of F- ions in the wastewater with the calcium carbonate released from the reagent. 2+ PO43- reacts to form calcium fluorophosphate precipitate.

[0041] After the reaction is complete, the staff turns off the second motor 14 and allows the sediment to settle naturally. After sedimentation, the staff opens the valve of the water pumping pipe 9 and connects the external water pump to pump out the upper clear liquid (fluoride ion concentration ≤1mg / L). Then, the staff opens the slag discharge port 8 and injects clean water through the clean water pipe 10 to flush the sediment to the slag discharge port 8 for discharge.

[0042] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A wastewater defluoridation device, comprising a base (1), characterized in that: The base (1) has a defluorination cylinder (2) on top, and a sealing cover (3) is connected to the top of the defluorination cylinder (2). A second motor (14) is installed at the bottom of the defluorination cylinder (2), and a stirring shaft (15) is connected to the output end of the second motor (14). A stirring blade (16) is fixed on the outer surface of the stirring shaft (15), and an active conical tooth (18) is fixed at the top of the stirring shaft (15). A tilting shaft (12) is installed inside the defluorination cylinder (2), and a stirring plate (13) and a driven conical tooth (19) are fixed on the outer surface of the tilting shaft (12). A water inlet pipe (5) passes through one side of the top of the sealing cover (3). The top center of the sealing cover (3) is provided with a feeding assembly (4). The feeding assembly (4) includes a feeding cylinder (401) that passes through the top of the sealing cover (3). A first motor (402) is installed on the top of the feeding cylinder (401). The output end of the first motor (402) is connected to a drive shaft (403). A crushing roller (404) is fixed on the outer surface of the drive shaft (403). A receiving hopper (407) is welded to the bottom end of the drive shaft (403) through a fixing rod (406). A feeding pipe (408) passes through the bottom of the receiving hopper (407). A feeding port (410) is provided on one side of the feeding cylinder (401).

2. The wastewater defluoridation device according to claim 1, characterized in that: The outer surface of the receiving hopper (407) is fixed with a slip ring (409), and the bottom of the sealing cover (3) is fixed with a slide rail (405). The receiving hopper (407) slides in cooperation with the slide rail (405) through the slip ring (409).

3. The wastewater defluoridation device according to claim 1, characterized in that: The defluorination cylinder (2) is provided with a water pumping pipe (9) and a slag discharge port (8) on one side below, and the interior of the defluorination cylinder (2) is inclined along the direction of the slag discharge port (8).

4. The wastewater defluoridation device according to claim 1, characterized in that: A clean water pipe (10) runs through the top of the other side of the defluorination cylinder (2).

5. The wastewater defluoridation device according to claim 1, characterized in that: The defluorination cartridge (2) has a sealing box (11) fixed inside by a connecting rod (17), and the active bevel tooth (18) and the driven bevel tooth (19) are both located inside the sealing box (11). The top of the sealing box (11) is cone-shaped.

6. The wastewater defluoridation device according to claim 1, characterized in that: The stirring blades (16) are arranged in several groups from top to bottom, and the outer surface of the several groups of stirring blades (16) has multiple through holes.

7. The wastewater defluoridation device according to claim 1, characterized in that: The outer surface of the defluorination cylinder (2) is provided with an observation window (6).

8. The wastewater defluoridation device according to claim 1, characterized in that: The outer surface of the defluorination cylinder (2) is equipped with a control panel (7), and the first motor (402) and the second motor (14) are both electrically connected to the control panel (7).

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