A device for removing fluoride from tail water

Abstract

The invention provides a device for removing fluoride in tail water, belonging to the technical field of sewage treatment equipment; the device comprises a sedimentation cylinder for treating tail water, wherein a water inlet pipe and a feeding pipe are provided on the side wall of the sedimentation cylinder for respectively adding tail water and treatment drugs into the sedimentation cylinder; a filter plate for filtering solid precipitates is arranged in the sedimentation cylinder, and the filter plate can move axially along the sedimentation cylinder; before treating the tail water, the filter plate is located above the feeding pipe and the water inlet pipe, the tail water and the treatment drugs are passed into the sedimentation cylinder, after the water reacts with the treatment drugs, the filter plate moves downward to filter the solid precipitates under the filter plate instead of standing to shorten the tail water treatment time; the device is used to solve the technical problem of low treatment efficiency of the existing device for removing fluoride ions.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment equipment, and in particular relates to a device for removing fluoride from tail water. Background Art

[0002] Manufacturers involved in storage chips, liquid crystal displays and solar photovoltaic industries will all produce tail water with high fluoride concentrations. After the tail water enters the sewage treatment plant, the fluoride concentration must be reduced to below the standard value before discharge is allowed. If the fluoride concentration in the tail water is not reduced to below the standard value, it will have a certain negative impact on drinking water safety and water ecology.

[0003] Existing fluoride removal technologies mainly include precipitation, activated alumina adsorption, electrodialysis, reverse osmosis, ion exchange, adsorption, bone char adsorption and zeolite defluoridation. Among them, precipitation is the most widely used. The precipitation method mainly refers to adding precipitants such as lime, calcium salt or phosphate (i.e. treatment drugs) to the fluoride-containing tail water, so that the precipitant combines with the fluoride ions in the tail water and converts them into solid precipitates, and finally removes the fluoride ions by solid-liquid separation.

[0004] However, when using the precipitation method to remove fluoride ions, after the precipitant combines with the fluoride ions in the tail water, it takes a certain amount of time to allow the solid precipitate to completely settle. Only after the solid precipitate is completely settled can the treated water be transferred to the next process, which results in low tail water treatment efficiency.

[0005] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0006] The object of the present invention is to provide a device for removing fluoride from tail water, so as to solve the technical problem of low treatment efficiency of existing devices for removing fluoride ions.

[0007] In order to achieve the above object, the device for removing fluoride from tail water of the present invention provides the following technical solution:

[0008] A device for removing fluoride in tail water comprises a sedimentation cylinder for treating tail water, wherein the side wall of the sedimentation cylinder is provided with a water inlet pipe and a feeding pipe for respectively adding tail water and treatment drugs into the sedimentation cylinder; a filter plate for filtering solid precipitates is arranged in the sedimentation cylinder, and the filter plate can move axially along the sedimentation cylinder; before treating the tail water, the filter plate is located above the feeding pipe and the water inlet pipe, the tail water and the treatment drugs are passed into the sedimentation cylinder, and after the water reacts with the treatment drugs, the filter plate moves downward to filter the solid precipitates under the filter plate instead of standing to shorten the tail water treatment time.

[0009] As a further optimized technical solution, the device for removing fluoride from tail water further includes a driving assembly for driving the filter plate to move axially, and the driving assembly has:

[0010] A guide component, wherein the guide component is vertically arranged in the sedimentation cylinder, and the filter plate is sleeved on the guide portion and slidably cooperates with the guide component to move axially along the sedimentation cylinder;

[0011] A driving member, the driving member is used to drive the filter plate to slide along the guide member;

[0012] A first rotation driving source is provided on the sedimentation cylinder and is used to provide driving force for the movement of the driving member.

[0013] As a further optimized technical solution, a stirring assembly is provided in the guide component to accelerate the reaction between the tail water and the treatment drug;

[0014] The stirring assembly comprises:

[0015] A stirring rod, wherein the stirring rod is arranged on the guide component;

[0016] a second rotation driving source, which is disposed on the sedimentation cylinder and is used to drive the guide member to rotate;

[0017] A hidden groove, which is arranged on the outer side wall of the guide component and is used to completely accommodate the stirring rod; the stirring rod has a first position perpendicular to the axial direction of the guide component and a second position in which the stirring rod is completely accommodated in the hidden groove;

[0018] A transmission unit is used to drive the stirring rod to switch between a first position and a second position.

[0019] As a further optimized technical solution, a transmission rod is arranged in the guide component, and the transmission rod can move axially along the guide component; one end of the stirring rod is arranged inside the hidden groove and is hinged with the guide component; the stirring rod is arranged at one end of the hidden groove and is fixedly connected with a gear, and the transmission rod is provided with a rack meshing with the gear; when the transmission rod moves upward, the rack drives the stirring rod to rotate to the first position through the gear, and when the transmission rod moves downward, the rack drives the stirring rod to rotate to the second position through the gear, and the transmission rod, the gear and the rack constitute the transmission unit.

[0020] As a further optimized technical solution, the top of the transmission rod is fixedly connected to a sliding ring, which is sleeved on the top of the guide component and slidingly matched with the outer wall of the guide component. The filter plate slides along the guide component to push the sliding ring to move, thereby driving the transmission rod to move axially; a rotating ring is provided at the bottom of the sliding ring, and the rotating ring slidingly matches with the sliding ring.

[0021] As a further optimized technical solution, an elastic reset member is arranged on the top of the sliding ring, and the elastic reset member is sleeved on the top of the guide component and is used to press the sliding ring.

[0022] As a further optimized technical solution, a cleaning brush is fixedly provided at the bottom end of the transmission rod, and a second sliding groove is provided at the position of the guide component corresponding to the cleaning brush for allowing the cleaning brush to move axially along the guide component. The cleaning brush moves downward to contact the bottom wall of the sedimentation cylinder.

[0023] As a further optimized technical solution, a de-impurity groove is arranged on the outer side of the bottom of the sedimentation cylinder, and a slag discharge structure is arranged on the side wall of the sedimentation cylinder opposite to the de-impurity groove for discharging solid sediment at the bottom of the sedimentation cylinder.

[0024] As a further optimized technical solution, the impurity removal tank is arranged circumferentially around the sedimentation cylinder.

[0025] As a further optimized technical solution, the slag discharge structure includes a through hole and a stop ring arranged on the side wall of the sedimentation cylinder. The stop ring is sleeved on the outside of the sedimentation cylinder and can move axially along the sedimentation cylinder to cover, close or open the through hole.

[0026] Beneficial effect: By adopting the technical solution of the present invention, when treating tail water, first move the filter plate to above the feeding pipe and the water inlet pipe, then pass the tail water into the sedimentation barrel through the water inlet pipe, and then add the treatment drug into the sedimentation barrel through the feeding pipe, so that the fluoride ions in the tail water react with the precipitant to generate solid precipitates; then move the filter plate downward. During this process, the filter plate can forcibly separate the solid and liquid of the tail water, and filter the solid precipitates to the lower side of the filter plate, and the filtered liquid can be directly obtained. Compared with the prior art, the tail water does not need to be left to stand after treatment, and the solid-liquid separation of the tail water can be completed by the filter plate, thereby effectively improving the treatment efficiency of the tail water. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0028] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the internal structure of a sedimentation cylinder according to an embodiment of the present invention;

[0030] Figure 3 for Figure 2 A schematic diagram of the structure enlargement of part A;

[0031] Figure 4This is a schematic diagram of the assembly structure of a guide component, a stirring rod, and a cleaning brush according to an embodiment of the present invention;

[0032] Figure 5 Another schematic diagram of the internal structure of the sedimentation cylinder according to an embodiment of the present invention.

[0033] In the figure: 1. sedimentation cylinder; 2. water inlet pipe; 3. feeding pipe; 4. filter plate; 5. guide component; 501. hidden groove; 502. second sliding groove; 503. first sliding groove; 6. driving member; 7. first rotating driving source; 8. stirring rod; 9. second rotating driving source; 10. transmission rod; 1001. rack; 1002. first connecting block; 1003. second connecting block; 11. gear; 12. sliding ring; 13. rotating ring; 14. elastic reset member; 15. cleaning brush; 1501. support rod; 1502. top brush; 1503. bottom brush; 16. debris removal groove; 17. through hole; 18. stop ring; 19. water pump; 1901. discharge pipe; 20. sewage pipe; 21. filter screen; 22. electric push rod; 23. fixing ring. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0035] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0036] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0037] The present invention provides a device for removing fluoride from tail water. By arranging a filter plate in a sedimentation cylinder, when the tail water reacts with a treatment drug, it is filtered through the filter plate to quickly achieve solid-liquid separation, shortening the overall treatment time, thereby improving the treatment efficiency of the tail water.

[0038] Example 1

[0039] like Figure 1-5 As shown, and specific reference Figure 1 , Figure 2 The device for removing fluoride from tail water includes a sedimentation cylinder 1 for treating tail water. The sedimentation cylinder 1 is cylindrical and has a chamber for containing tail water. The sedimentation cylinder 1 has a water inlet pipe 2 and a feeding pipe 3 on the side wall. The water inlet pipe 2 is used to add tail water into the chamber of the sedimentation cylinder 1, and the feeding pipe 3 is used to add treatment drugs into the chamber of the sedimentation cylinder 1. A filter plate 4 for filtering solid precipitates is installed in the sedimentation cylinder 1. The size of the filter plate 4 is adapted to the cross-section of the internal chamber of the sedimentation cylinder 1, and the filter plate 4 can move axially along the sedimentation cylinder 1. In this way, when the filter plate 4 moves axially along the sedimentation cylinder 1, the solid precipitates can be pressed to the bottom of the filter plate 4, thereby facilitating solid-liquid separation, that is, filtering is used instead of standing to shorten the tail water treatment time.

[0040] In order to facilitate the discharge of the filtered solution, a water pump 19 is fixedly installed on the top of the sedimentation cylinder 1. The water pump 19 has a suction pipe (not shown in the figure) for pumping water and a discharge pipe 1901 for draining water. The suction pipe is a hose with a length not less than the height of the internal chamber of the sedimentation cylinder 1. The end of the suction pipe away from the water pump 19 extends into the chamber of the sedimentation cylinder 1 and is placed on the filter plate 4. It can move axially along the sedimentation cylinder 1 with the filter plate 4. The discharge pipe 1901 is connected to the equipment of the next external processing process.

[0041] During specific use, before treating the tail water, the filter plate 4 is first moved to above the feeding pipe 3 and the water inlet pipe 2, and then the tail water is passed into the sedimentation barrel 1 through the water inlet pipe 2, and then the treatment drug is added into the sedimentation barrel 1 through the feeding pipe 3, so that the fluoride ions in the tail water react with the treatment drug to generate solid precipitates. After the water reacts with the treatment drug, the filter plate 4 is moved downward, and the filter plate 4 forcibly separates the treated tail water into solid and liquid, and presses the solid precipitates to the lower side of the filter plate 4. During the descent of the filter plate 4, the water pump 19 can be started synchronously to discharge the filtrate above the filter plate 4 to the next treatment process. Compared with the prior art, the filtering method through the filter plate 4 effectively shortens the tail water treatment time and improves the treatment efficiency.

[0042] On the basis of the above technical solution, in order to facilitate the movement of the filter plate 4, the device for removing fluoride in tail water also includes a driving assembly for driving the filter plate 4 to move axially, and the driving assembly has a guide component 5, a driving member 6, and a first rotation driving source 7.

[0043] The guide component 5 is vertically installed in the sedimentation cylinder 1 and installed at the center of the sedimentation cylinder 1. The filter plate 4 is sleeved on the guide part and slidably cooperates with the guide component 5 to move axially along the sedimentation cylinder 1. The driving member 6 is used to drive the filter plate 4 to slide along the guide component 5. The first rotation driving source 7 is provided on the sedimentation cylinder 1 to provide driving force for the driving member 6 to move.

[0044] In this embodiment, the first rotation driving source 7 is a motor, the driving member 6 is a rope or a chain, the first rotation driving source 7 is fixedly installed on the top of the sedimentation cylinder 1, and one end of the driving member 6 is fixedly wound around its rotation output shaft, or an electric hoist is installed on the rotation output shaft, one end of the driving member 6 is wound and fixed on the electric hoist, and the other end of the driving member 6 is fixedly connected to the filter plate 4. In this way, when the first rotation driving source 7 is started, the end of the driving member 6 connected to the first rotation driving source 7 rotates around the rotation output shaft of the first rotation driving source 7 or the electric hoist to achieve pulling up or lowering the filter plate 4. In order to make the filter plate 4 descend more smoothly, the filter plate 4 can be made of a material with a higher density, or a counterweight can be fixedly connected to the filter plate 4.

[0045] Furthermore, in order to ensure the smooth movement of the filter plate 4, two groups of drive components are installed, and the two groups of drive components are symmetrically installed on the sedimentation cylinder 1 with the plane where the axis of the sedimentation cylinder 1 is located as a reference.

[0046] In other embodiments, the driving member 6 can be a screw, which is rotatably installed in the chamber of the sedimentation cylinder 1 and is arranged parallel to the guide member 5. The screw passes through the filter plate 4 and is threadedly connected to the filter plate 4. At this time, the first rotation driving source 7 is still a motor, and the first rotation driving source 7 is used to drive the screw forward and reverse to drive the filter plate 4 to move up and down along the axial direction of the sedimentation cylinder 1.

[0047] like Figure 2 , Figure 4 As shown, in order to accelerate the reaction between tail water and treatment drugs and improve the treatment efficiency of tail water, a stirring assembly is arranged in the guide component 5, and the stirring assembly includes a stirring rod 8, a second rotation driving source 9, a hidden groove 501 and a transmission unit.

[0048] The stirring rod 8 is installed on the guide component 5, and the second rotation drive source 9 is installed on the top of the sedimentation cylinder 1. At this time, the two ends of the guide component 5 are rotated with the sedimentation cylinder 1. The second rotation drive source 9 uses a motor and is used to drive the guide component 5 to rotate, so as to drive the stirring rod 8 to rotate, so as to facilitate the stirring of the mixture of tail water and treatment drugs. The hidden groove 501 is opened on the outer wall of the guide component 5, and its shape is similar to that of the stirring rod 8, which is used to completely accommodate the stirring rod 8. The stirring rod 8 has a first position perpendicular to the axial direction of the guide component 5 and a second position completely accommodated in the hidden groove 501. When the filter plate 4 moves downward for solid-liquid separation, the stirring rod 8 needs to be completely accommodated in the hidden groove 501 to avoid interference with the filter plate 4. The transmission unit is used to drive the stirring rod 8 to switch between the first position and the second position.

[0049] A transmission rod 10 is arranged in the guide component 5. The transmission rod 10 is a square rod structure. A sliding channel matching the shape of the transmission rod 10 is arranged in the corresponding guide component 5. The transmission rod 10 is installed in the sliding channel and slides with the guide component 5 to realize axial movement along the guide component 5.

[0050] One end of the stirring rod 8 is installed inside the hidden groove 501 and is hinged to the guide component 5; the stirring rod 8 is arranged at one end of the hidden groove 501 and is fixedly connected to a gear 11, and a rack 1001 meshing with the gear 11 is provided on the transmission rod 10; when the transmission rod 10 moves upward, the rack 1001 drives the stirring rod 8 to rotate to the first position through the gear 11, and when the transmission rod 10 moves downward, the rack 1001 drives the stirring rod 8 to rotate to the second position through the gear 11. The transmission rod 10, the gear 11 and the rack 1001 constitute the above-mentioned transmission unit.

[0051] In this embodiment, there are multiple groups of stirring rods 8, which are arranged axially at intervals along the guide component 5. Each group of stirring rods 8 has two stirring rods, and the two stirring rods 8 in each group are symmetrically arranged. The transmission rod 10 is installed between the two stirring rods 8. Racks 1001 are set on both sides of the transmission rod 10 corresponding to the position of the stirring rod 8 to engage with the gear 11 at the end of the stirring rod 8.

[0052] like Figure 3As shown, the top of the transmission rod 10 is integrally fixedly connected with a second connecting block 1003 arranged transversely, and the guide component 5 is provided with a first sliding groove 503 communicating with the internal sliding channel at the top position corresponding to the transmission rod 10. The first sliding groove 503 is in a long strip shape and is arranged axially along the guide component 5. The second connecting block 1003 extends out of the first sliding groove 503 and can slide along the first sliding groove 503 to facilitate the driving of the transmission rod 10 to move up and down. The transmission rod 10 is fixedly connected with a sliding ring 12 through the second connecting block 1003. The sliding ring 12 is sleeved on the top of the guide component 5 and slides with the outer wall of the guide component 5. By driving the sliding ring 12 to move axially along the guide component 5, the driving transmission rod 10 can be driven to move axially in the guide component 5.

[0053] In this embodiment, the filter plate 4 slides along the guide component 5 to push the sliding ring 12 to move, thereby driving the transmission rod 10 to move axially.

[0054] Specifically, during use, before the tail water and treatment drugs are introduced into the sedimentation barrel 1, the filter plate 4 is lifted upward, and the filter plate 4 moves upward to push the sliding ring 12 to slide upward. At this time, the sliding ring 12 drives the transmission rod 10 to move upward, and at the same time drives the stirring rod 8 to rotate until the stirring rod 8 is in the first position and the filter plate 4 stops moving. At this time, the stirring rod 8 is in a fully expanded state, and the second rotation driving source 9 is started. The second rotation driving source 9 drives the guide component 5 to rotate, and then carries the stirring rod 8 to perform a stirring action to achieve stirring of the tail water. After the stirring is completed, the filter plate 4 is moved downward. At this time, the sliding ring 12 and the transmission rod 10 move downward under the action of their own gravity, and the rack 1001 drives the gear 11 at the end of the stirring rod 8 to rotate, so that the stirring rod 8 rotates from the first position to the second position, and the stirring rod 8 is completely received in the hidden groove 501, so as not to interfere with the downward movement of the filter plate 4 for the filter pressing action.

[0055] In the above technical solution, because the bottom of the sliding ring 12 directly contacts the filter plate 4 and rotates with the filter plate 4 during stirring, it is easy to cause mutual wear between the sliding ring 12 and the filter plate 4. In order to reduce the wear between the sliding ring 12 and the filter plate 4, a rotating ring 13 is rotatably installed at the bottom of the sliding ring 12. Specifically, a bearing can be installed between the rotating ring 13 and the sliding ring 12 to reduce the rotational friction. In this way, when stirring is performed again, the bottom end of the rotating ring 13 presses the filter plate 4, and the top end rotates with the sliding ring 12, which effectively reduces the wear between the filter plate 4 and the sliding ring 12.

[0056] Furthermore, in order to ensure that the stirring rod 8 rotates smoothly from the first position to the second position, an elastic reset member 14 is provided on the top of the sliding ring 12 . The elastic reset member 14 is sleeved on the top of the guide component 5 and is used to press the sliding ring 12 .

[0057] In this embodiment, the elastic reset member 14 is a coil spring, the top of the guide member 5 is fixedly connected with a fixing ring 23, the coil spring is sleeved on the outer wall of the guide member 5, the top is fixedly connected with the fixing ring 23, and the bottom presses the sliding ring 12. In this way, when the filter plate 4 moves upward and pushes the sliding ring 12, the coil spring will be compressed. When the filter plate 4 moves downward, the restriction on the sliding ring 12 is cancelled, and the coil spring automatically pops open to push the sliding ring 12 downward, so that the stirring rod 8 is quickly stored in the hidden groove 501. In addition, under the action of the coil spring, the storage state of the stirring rod 8 can also be stably maintained.

[0058] Furthermore, if Figure 2 , Figure 5 As shown, the bottom end of the transmission rod 10 is integrally fixedly connected with a first connecting block 1002, and the guide component 5 is provided with a second sliding groove 502 connected to the internal sliding channel at a position corresponding to the bottom of the transmission rod 10. The second sliding groove 502 is also in a long strip shape and is arranged axially along the guide component 5. Cleaning brushes 15 are fixedly connected at both ends of the first connecting block 1002. The cleaning brush 15 can slide up and down along the first sliding groove 503 as the transmission rod 10 moves up and down. The cleaning brush 15 can contact the bottom wall of the sedimentation cylinder 1 when moving up and down, that is, when the cleaning brush 15 contacts the bottom wall of the sedimentation cylinder 1, the bottom wall of the sedimentation cylinder 1 can be cleaned, and when the cleaning brush 15 moves upward to break away from the bottom wall of the sedimentation cylinder 1, it can act as a stirring component to accelerate the reaction between the tail water and the treatment drug.

[0059] Specifically, the cleaning brush 15 has a support rod 1501, the first connecting block 1002 is fixedly connected to the support rod 1501, the support rod 1501 is arranged horizontally, the support rod 1501 has top bristles 1502 on the upper side and bottom bristles 1503 on the lower side, the top bristles 1502 are used to clean the bottom surface of the filter plate 4, and the bottom bristles 1503 are used to clean the bottom wall of the sedimentation cylinder 1. Specifically, after the tail water is discharged from the sedimentation cylinder 1, the cleaning brush 15 can be lowered to contact the bottom wall of the sedimentation cylinder 1, and the filter plate 4 can be lowered to contact the top bristles 1502 of the cleaning brush 15. At this time, the guide component 5 is rotated to simultaneously clean the filter plate 4 and the sedimentation cylinder 1.

[0060] Furthermore, in order to facilitate the cleaning of solid sediments under the filter plate 4, a de-impurity groove 16 is provided on the outer side of the bottom of the sedimentation cylinder 1, and a slag discharge structure is provided on the side wall of the sedimentation cylinder 1 relative to the de-impurity groove 16 for discharging the solid sediments at the bottom of the sedimentation cylinder 1.

[0061] In this embodiment, in order to improve the cleaning efficiency, the impurity removal groove 16 is arranged circumferentially around the sedimentation cylinder 1. The slag discharge structure includes a through hole 17 and a stop ring 18. The through hole 17 is opened on the bottom side wall of the sedimentation cylinder 1. The stop ring 18 is sleeved on the outside of the sedimentation cylinder 1. An electric push rod 22 is installed on the stop ring 18. The electric push rod 22 is used to push the stop ring 18 to move axially on the sedimentation cylinder 1, so as to cover, close or open the through hole 17. In this way, when it is necessary to discharge solid sediment, the electric push rod 22 pulls the stop ring 18 upward to open the through hole 17, and discharges the solid sediment into the impurity removal groove 16 through the through hole 17. When the tail water reacts in the sedimentation cylinder 1, the stop ring 18 needs to move downward to close the through hole 17.

[0062] Furthermore, a sewage pipe 20 is connected to the bottom of the impurity removal tank 16 for discharging tail water containing solid sediments. In order to prevent the solid sediments from being discharged during the tail water discharge, a filter screen 21 is provided at the water inlet of the sewage pipe 20 .

[0063] Specifically, during use, in order to quickly discharge the solid precipitates, after the through hole 17 is opened, the cleaning brush 15 can be rotated, so that the cleaning brush 15 can quickly push the solid precipitates out of the through hole 17 .

[0064] The specific method of using the above device is as follows:

[0065] The first step is to move the filter plate 4 to above the water inlet pipe 2 and the feeding pipe 3 and press the sliding ring 12. At this time, the stirring rod 8 is rotated to the first position, and at the same time, the stop ring 18 is moved downward to close the through hole 17.

[0066] In the second step, the tail water to be treated is introduced into the sedimentation tank 1 through the water inlet pipe 2, and a certain amount of precipitant is added into the sedimentation tank 1 through the feeding pipe 3.

[0067] In the third step, the second rotation driving source 9 drives the stirring rod 8 to rotate through the guide component 5 to stir the tail water in the sedimentation tank 1, so that the fluoride ions in the tail water and the precipitant react faster.

[0068] Step 4. After stirring for a preset time, turn off the second rotation drive source 9, and then control the filter plate 4 to move downward. During this process, the stirring rod 8 will rotate into the hidden groove 501 and will not interfere with the movement of the filter plate 4. During the movement of the filter plate 4, the filter plate 4 can forcibly separate the solid and liquid of the tail water and press the solid precipitate to the lower side of the filter plate 4 until the filter plate 4 moves to the top bristles 1502 of the compression cleaning brush 15. At this time, the top bristles 1502 are in contact with the lower side of the filter plate 4, and the bottom bristles 1503 are in contact with the bottom wall of the sedimentation barrel 1.

[0069] Step 5: Start the water pump 19. The water pump 19 can also be started during the descent of the filter plate 4 to transfer the tail water on the upper side of the filter plate 4 to the next process.

[0070] Step 6: Start the electric push rod 22 to control the stop ring 18 to open the through hole 17, so that the tail water of the mixed solid precipitate on the lower side of the filter plate 4 is discharged into the impurity removal tank 16 through the through hole 17.

[0071] Step 7: Start the second rotation drive source 9 to drive the cleaning brush 15 to rotate through the guide component 5 to clean the solid sediment attached to the bottom side of the filter plate 4 and the bottom of the sedimentation barrel 1, and throw these solid sediments into the impurity removal tank 16 through the centrifugal force of the cleaning brush 15.

[0072] In summary, by using this device, the solid-liquid separation of tail water can be quickly achieved, thereby improving the treatment efficiency of tail water.

[0073] It should be understood that the above description is merely exemplary and the embodiments of the present application do not limit this.

[0074] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A device for removing fluoride from tail water, comprising a sedimentation cylinder (1) for treating tail water, characterized in that: The side wall of the sedimentation cylinder (1) is provided with a water inlet pipe (2) and a feeding pipe (3) for respectively adding tail water and treatment drugs into the sedimentation cylinder (1); a filter plate (4) for filtering solid sediment is arranged in the sedimentation cylinder (1), and the filter plate (4) can move along the axial direction of the sedimentation cylinder (1); before treating the tail water, the filter plate (4) is located above the feeding pipe (3) and the water inlet pipe (2), and the tail water and the treatment drugs are passed into the sedimentation cylinder (1); after the water reacts with the treatment drugs, the filter plate (4) moves downward to filter the solid sediment under the filter plate (4) instead of letting it stand, thereby shortening the tail water treatment time; The device for removing fluoride from tail water further comprises a driving assembly for driving the filter plate (4) to move axially, the driving assembly comprising: A guide component (5), the guide component (5) being vertically arranged in the sedimentation cylinder (1), the filter plate (4) being sleeved on the guide component and slidably engaged with the guide component (5) so as to move axially along the sedimentation cylinder (1); A driving member (6), the driving member (6) being used to drive the filter plate (4) to slide along the guide member (5); a first rotation driving source (7), the first rotation driving source (7) being arranged on the sedimentation cylinder (1) and being used to provide driving force for the driving member (6) to move; The guide component (5) is provided with a stirring assembly for accelerating the reaction between the tail water and the treatment drug; The stirring assembly comprises: a stirring rod (8), wherein the stirring rod (8) is arranged on the guide component (5); a second rotation driving source (9), the second rotation driving source (9) being arranged on the sedimentation cylinder (1) and used for driving the guide component (5) to rotate; A hidden groove (501), wherein the hidden groove (501) is arranged on the outer side wall of the guide component (5) and is used to completely accommodate the stirring rod (8); the stirring rod (8) has a first position perpendicular to the axial direction of the guide component (5) and a second position completely accommodated in the hidden groove (501); A transmission unit, the transmission unit being used to drive the stirring rod (8) to switch between a first position and a second position; a transmission rod (10) is arranged in the guide component (5), and the transmission rod (10) can move axially along the guide component (5); one end of the stirring rod (8) is arranged in the hidden groove (501) and is hinged to the guide component (5); one end of the stirring rod (8) arranged in the hidden groove (501) is fixedly connected to a gear (11), and the transmission rod (10) is provided with a rack (1001) meshing with the gear (11); when the transmission rod (10) moves upward, the rack (1001) drives the stirring rod (8) to rotate toward the first position via the gear (11); when the transmission rod (10) moves downward, the rack (1001) drives the stirring rod (8) to rotate toward the second position via the gear (11), and the transmission rod (10), the gear (11) and the rack (1001) constitute the transmission unit; The top of the transmission rod (10) is fixedly connected to a sliding ring (12); the sliding ring (12) is sleeved on the top of the guide component (5) and slidably engages with the outer wall of the guide component (5); the filter plate (4) slides along the guide component (5) to push the sliding ring (12) to move, thereby driving the transmission rod (10) to move axially; a rotating ring (13) is provided at the bottom of the sliding ring (12); the rotating ring (13) slidably engages with the sliding ring (12).

2. The device for removing fluoride from tail water according to claim 1, characterized in that: An elastic reset member (14) is provided on the top of the sliding ring (12); the elastic reset member (14) is sleeved on the top of the guide component (5) and is used to press the sliding ring (12).

3. The device for removing fluoride from tail water according to claim 1, characterized in that: A cleaning brush (15) is fixedly provided at the bottom end of the transmission rod (10), and a second sliding groove (502) is provided on the guide component (5) at a position corresponding to the cleaning brush (15) for allowing the cleaning brush (15) to move axially along the guide component (5). The cleaning brush (15) moves downward and can contact the bottom wall of the sedimentation cylinder (1).

4. The device for removing fluoride from tail water according to any one of claims 1 to 3, characterized in that: A de-impurity groove (16) is arranged outside the bottom of the sedimentation cylinder (1), and a slag discharge structure is arranged on the side wall of the sedimentation cylinder (1) opposite to the de-impurity groove (16) for discharging solid sediment at the bottom of the sedimentation cylinder (1).

5. The device for removing fluoride from tail water according to claim 4, characterized in that: The impurity removal tank (16) is arranged circumferentially around the sedimentation cylinder (1).

6. The device for removing fluoride from tail water according to claim 4, characterized in that: The slag discharge structure comprises a through hole (17) and a stop ring (18) arranged on the side wall of the sedimentation barrel (1); the stop ring (18) is sleeved on the outside of the sedimentation barrel (1) and can move axially along the sedimentation barrel (1) to cover, close or open the through hole (17).

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